WO2019229928A1 - Check valve and package with check valve - Google Patents

Check valve and package with check valve Download PDF

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Publication number
WO2019229928A1
WO2019229928A1 PCT/JP2018/020945 JP2018020945W WO2019229928A1 WO 2019229928 A1 WO2019229928 A1 WO 2019229928A1 JP 2018020945 W JP2018020945 W JP 2018020945W WO 2019229928 A1 WO2019229928 A1 WO 2019229928A1
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WO
WIPO (PCT)
Prior art keywords
valve seat
sheet
valve
lower valve
seals
Prior art date
Application number
PCT/JP2018/020945
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French (fr)
Japanese (ja)
Inventor
幹雄 田中
千也 田中
Original Assignee
有限会社田中テクニカル
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Publication date
Application filed by 有限会社田中テクニカル filed Critical 有限会社田中テクニカル
Priority to JP2020522501A priority Critical patent/JPWO2019229928A1/en
Priority to PCT/JP2018/020945 priority patent/WO2019229928A1/en
Publication of WO2019229928A1 publication Critical patent/WO2019229928A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/20—Check valves specially designed for inflatable bodies, e.g. tyres

Definitions

  • the present invention relates to a seat check valve and a package with a check valve.
  • a valve made of a sheet has been used to discharge gas generated from the stored grains to the outside of the bag.
  • This check valve allows the flow of the forward airflow and shuts off the reverse airflow by opening and closing the valve flow path, which is a space through which the gas passes, in discharging the gas. It can be done.
  • the inventor of the present application has made many inventions related to check valves, and as one conventional example thereof, there are check valves described in Patent Documents 1 to 5. The valve flow path was provided. For this reason, if the valve flow path is closed due to the package being stuck to another object or the like, the intended forward fluid flow cannot be realized.
  • the inlet is only a base film provided with an opening. Therefore, both the valve film and the base film are subjected to pressure in the bag, so that the state in which the two films are in close contact may continue, and the valve opening may not be performed smoothly.
  • An object of the present invention is to provide a seat check valve having a plurality of valve flow paths having a new structure.
  • the present invention relates to an improvement in a check valve made of a sheet that is used while being fixed to a package sheet.
  • the check valve according to the present invention includes a pair of left and right base seats, a pair of left and right lower valve seats positioned above the base seat, and an upper valve seat disposed above the lower valve seat.
  • Both front and rear sides of these sheets are fixed in a sealed state by front and rear seals provided at the front and rear.
  • the opposing inner end sides of the pair of left and right base sheets and the opposing inner end sides of the pair of left and right lower valve seats are fixed in a sealed state by left and right inlet seals.
  • a plurality of sheets are sealed by the front and rear seals and the left and right inlet seals, thereby forming a cylindrical inlet having a thickness in the vertical direction. As a result, the inlet has higher rigidity than that of the single sheet.
  • the upper valve seat covers the space from the lower valve seat on the left to the lower valve seat on the right, including above the inlet.
  • the inlet seal guides the fluid from below the inlet to the valve flow path between the lower valve seat and the upper valve seat without introducing the fluid between the base seat and the lower valve seat. Is.
  • the said fluid in the said valve flow path is comprised so that it may flow out outside from the edge of the both right and left sides of the said upper valve seat.
  • the pressure receiving surface is a seat located on the lower surface of the check valve.
  • the upper valve seat is in the region of the inlet, and the base sheet is in the region other than the inlet, but the upper valve seat is placed on the base sheet in the region other than the inlet. Since other sheets including it are stacked, they are also subjected to pressure. As a result, there is a possibility that the inflow gap between the upper valve seat and the lower valve seat does not widen only by keeping all the seats overlapped by receiving upward pressure.
  • a plurality of sheets are sealed by the front and rear seals and the left and right inlet seals, thereby forming a cylindrical inlet having a thickness in the vertical direction.
  • the inflow port has higher rigidity than that of the single sheet. Therefore, the inflow gap between the upper valve seat and the inflow port is likely to widen due to the difference in rigidity between the two, and smooth valve opening during forward flow can be promoted.
  • the filter sheet is disposed between the base sheet and the lower valve sheet or below the base sheet so as to cover the inflow port.
  • the inflow port seal seals at least three sheets of the inner end sides of the pair of left and right base sheets, the inner end sides of the pair of left and right lower valve seats, and the filter sheet.
  • the filter sheet not only prevents foreign substances from being mixed into the valve flow path, but can further increase the rigidity of the inflow port, thereby further promoting smooth valve opening.
  • the number of seats arranged and sealed below the lower valve seat is the same for the front and rear seals and the left and right inlet seals.
  • the inflow port has a cylindrical shape with the same number of sealed sheets below the inflow gap, the rigidity of the entire cylinder is secured.
  • the total number of sheets sealed by the front and rear seals is larger than the total number of sheets sealed by the left and right inlet seals. As a result, the cylindrical inlet is maintained in a state supported by the front and rear seals.
  • this invention can be implemented as a thing provided with the means to improve the closing property of the said valve flow path between the said lower valve seat and the said upper valve seat.
  • at least one surface of the lower valve seat and the upper valve seat facing each other is provided with adhesiveness, or the lower valve seat and the upper valve seat It is assumed that the contact liquid is disposed in the valve flow path between or at least one of the means.
  • the inflow port can be implemented as a rectangular shape in plan view in which the front and rear seals on the front and rear sides are short sides and the left and right inflow port seals are long sides.
  • the check valve including the various means described above covers the opening provided in the package sheet. It is intended to provide what is arranged in.
  • the top, bottom, left and right, and front and rear indicate only the relative positional relationship between them, and that the absolute position is not specified.
  • the check valve is used upside down. Even in such a case, if the relative positional relationship satisfies the invention-specific matters of the present invention, it should be regarded as a check valve according to the implementation of the present invention.
  • the present invention is able to provide a seat check valve having a plurality of valve flow paths having a new structure.
  • the present invention has been able to improve the certainty of the operation of the valve, such as improving the valve opening performance in forward flow.
  • the check valve 10 according to the embodiment shown in FIG. 1 to FIG. 4 has an adhesive seal such as a heat seal, an adhesive, or an adhesive on the inner side of a package sheet 51 constituting a bag-like package 50 having airtightness. 21 is fixed and used so as to cover the opening 52 of the package 50 from the inside.
  • the check valve 10 is a bag body having airtightness suitable for storing contents (for example, cereals such as coffee beans or pet food) that generate gas with a change with time, such as fermentation, and storage items such as clothes.
  • a package 50 such as a compression bag suitable for volume reduction, in other words, an internal fluid (specifically, air but other fluid gas or liquid may be used after the storage is stored in a sealed state). ) Can be suitably applied to a package 50 having a function of discharging the outside.
  • the check valve 10 has a filter sheet 14 disposed on the left and right base sheets 11, a left and right lower valve seat 12 disposed on the filter sheet 14, and an upper valve seat disposed thereon. 13 is arranged.
  • the fluid flows through the inlet 32 provided in the filter sheet 14, the base sheet 11, and the lower valve sheet 12 and extends downward from the inflow gap 33. It passes through the valve flow path 31 between the valve seat 12 and the upper valve seat 13 and flows out from the outflow gap 34 serving as the outflow port 35 to the outflow space 36.
  • the fluid that has flowed out flows out of the package 50 through an opening 52 provided in the package sheet 51.
  • the base sheet 11, the lower valve sheet 12, and the upper valve sheet 13 may be configured by flexible synthetic resin sheets (for example, sheets made of various thermoplastic synthetic resins such as polyethylene, polypropylene, and PET, or composites). Are suitable.
  • the filter sheet 14 can be composed of various sheet bodies having openings such as non-woven fabrics and woven fabrics made of synthetic resin, etc., and can also be composed of a punching metal-like metal foil. It is also possible to configure.
  • the filter sheet 14 can be implemented with various changes in the aperture ratio and the mesh depending on the type of the stored item and the purpose of use of the filter, but in any case, the filter sheet 14 needs to allow passage of fluid.
  • the filter sheet 14 contains fine powder, and is provided to prevent the fine powder from entering the valve channel 31 or flowing out of the package 50. When the object does not contain or generate fine powder, it can be omitted, and only the base sheet 11, the lower valve sheet 12 and the upper valve sheet 13 are implemented as shown in FIG. can do. Further, as shown in FIG. 5 (B), the filter sheet 14 may be disposed below the base sheet 11 for implementation.
  • the base sheet 11 and the filter sheet 14 are less flexible than the lower valve sheet 12 and the upper valve sheet 13, the base sheet 11 and the filter sheet 14 can be used, and a relatively rigid metal foil is used or used together. It is also possible that the thickness of the seat is larger than that of the lower valve seat 12 and the upper valve seat 13. On the other hand, the lower valve seat 12 and the upper valve seat 13 open and close the valve flow path 31 when they are brought into close contact with each other, and have sufficient flexibility to realize a sharp movement. It is preferable to carry out with a thing.
  • All the seats (the base sheet 11, the lower valve seat 12, the upper valve seat 13, and the filter seat 14) constituting the check valve 10 of this embodiment all have the same front and rear width, and the front and rear of the check valve 10 The length is specified. These seats are fixed in a sealed state by front and rear seals 17 on both front and rear sides.
  • the filter sheet 14 is implemented as a sheet having the largest area, and covers the entire check valve 10 and defines its outer shape. It may be carried out with a size that can be covered.
  • the base sheet 11 is disposed in a pair on the left and right sides with the inlet 32 interposed therebetween, and is fixed in a sealed state by the front and rear seals 17 and the left and right seals 18 on the left and right sides thereof.
  • the front and rear seals 17 and the left and right seals 18 are connected to each other in a plan view, and constitute a peripheral seal 19 that defines the outer periphery of the check valve.
  • the planar shape is rectangular, but can be implemented in various forms such as a circle and an ellipse.
  • the lower valve seats 12 are arranged in a pair on the left and right sides with the inflow port 32 interposed therebetween.
  • the left and right lengths of the lower valve seats 12 are shorter than those of the base sheet 11, and the left and right ends are not fixed to other seats and are in a free state. ing.
  • the upper valve seat 13 is disposed thereon so as to cover the inflow port 32, and the left and right length thereof is shorter than that of the base sheet 11, and the left and right ends are substantially equal to the left and right ends of the lower valve seat 12. Has been placed.
  • the upper valve seat 13 covers the space from the left lower valve seat 12 to the right lower valve seat 12 including the upper part of the inflow port 32.
  • the left and right ends of the upper valve seat 13 are slightly longer than the left and right ends of the lower valve seat 12 and protrude from both the left and right sides.
  • the left and right ends of the lower valve seat 12 may be slightly longer than the left and right ends of the upper valve seat 13.
  • the left and right ends of the upper valve seat 13 are not fixed to other seats and are in a free state.
  • the inflow port 32 is formed in a vertical direction configured by fixing three sheets of a pair of left and right base sheets 11, a lower valve sheet 12, and a filter sheet 14 with an inflow port seal 16 and front and rear front and rear seals 17. This is a thick cylindrical opening.
  • the inflow port 32 in plan view, has a rectangular tube shape with a rectangular shape in plan view with the front and rear seals 17 as short sides and the left and right inflow seals 16 as long sides.
  • the inflow gap 33 (About the inflow gap 33)
  • the upper end surface of the inflow port 32 is covered with the upper valve seat 13, and a gap between the inner end sides of the pair of left and right lower valve seats 12 and the upper valve seat 13 constitutes an inflow gap 33.
  • the inflow gaps 33 extend in the front-rear direction over the entire length between the front-rear front-rear seals 17, respectively.
  • the inflow gap 33 is a gap serving as an inlet of the valve flow path 31 that is a space extending between the left and right sides formed between the lower valve seat 12 and the upper valve seat 13.
  • valve flow path 31 has the front and rear seals 17 as short sides in plan view, and the left and right inflow gaps 33 and the left and right sides of the lower valve seat 12 Make a rectangle with the long edges on both sides.
  • the left and right ends of the upper valve seat 13 are shorter than the left and right ends of the lower valve seat 12, the left and right ends of the upper valve seat 13 are the long sides of the valve flow path 31.
  • the inflow gap 33 closes the valve when the opposing surfaces of the lower valve seat 12 and the upper valve seat 13 are in close contact with each other, and allows the fluid to pass through when the both open up and down.
  • at least one of the opposing surfaces of the lower valve seat 12 and the upper valve seat 13 has adhesiveness.
  • at least one surface of the lower valve sheet 12 or the upper valve sheet 13 is a sheet having adhesiveness, or a coating film having adhesiveness is formed.
  • a close contact liquid 22 such as silicon in the valve flow path 31 between the lower valve seat 12 and the upper valve seat 13.
  • the left and right outflow gaps 34 are downstream ends of the left and right valve flow paths 31 and serve as outlets 35. Specifically, it is defined by the shorter left and right edges of the lower valve seat 12 and the upper valve seat 13 in the left-right direction.
  • the left and right outflow gaps 34 extend in the front-rear direction over the entire length between the front-rear front-rear seals 17.
  • the outflow space 36 is a region between the package sheet 51 and the upper surface of the check valve 10, and the fluid that has flowed out of the check valve 10 from the outflow gap 34 once enters the outflow space 36 and enters the package sheet 51. It flows out of the package 50 from the provided opening 52.
  • the outer periphery of the outflow space 36 is defined by an adhesive seal 21 that fixes the check valve 10 to the package sheet 51 in a sealed state. Although this sticking seal 21 can be provided overlapping with the peripheral seal 19, it may be provided at a separate position.
  • the inlet seal 16, the peripheral seal 19, and the sticker seal 21 are not particularly limited as long as predetermined sheets are fixed in a sealed state. However, in current mass production facilities, a fusion seal such as a heat seal or an ultrasonic seal is used. It is desirable to implement as.
  • the lower valve seat 12 is attached to the upper valve seat 13 and the inflow gap is a problem.
  • the periphery of the inflow port 32 is defined by the inflow port seal 16 and the front and rear seals 17 and is harder than the lower valve seat 12 and the upper valve seat 13. Yes. Therefore, the upper valve seat 13 has a greater degree of freedom than the inflow port 32, and only the upper valve seat 13 is separated from the inflow port 32, which has a high rigidity by sealing a plurality of sheets, and is easily lifted. Therefore, occurrence of valve opening failure can be suppressed.
  • the inflow port 32 is integrated with the base sheet 11, the lower valve sheet 12, and the filter sheet 14 by a seal such as a fusion seal.
  • the upper valve seat 13 is more easily separated from the inlet 32 because it is hardened and has a cylindrical shape with a length in the vertical direction. It should be noted that the melt sealing of the inlet 32 can be carried out by making the upper surface uneven or rough on the upper surface.
  • the inflow port 32 has a rectangular shape in a plan view in which the front and rear front and rear seals 17 have short sides and the left and right inflow port seals 16 have long sides. Therefore, a sufficient length can be given to the inflow port 32 in the front-rear direction. And, if there is a gap somewhere between the upper valve seat 13 and the inlet 32 and the fluid can flow into the valve flow path 31, the inflow gap 33 can be opened over its entire length, From this point as well, it is an advantageous form for suppressing the occurrence of defective valve opening.
  • the positions of the inner end sides of the base sheet 11 and the lower valve seat 12 and the positions of the left and right inlet seals 16 are depicted as being completely coincident with each other.
  • the left and right inlet seals 16 may be sealed at positions slightly outside the inner end sides of the base sheet 11 and the lower valve sheet 12, respectively.
  • the inner end sides of the base sheet 11 and the lower valve seat 12 may slightly protrude from the left and right inlet seals 16 to the inside of the inlet 32.
  • each of the base sheet 11, the lower valve sheet 12, the upper valve sheet 13, and the filter sheet 14 includes a base tape 41, a lower valve tape 42,
  • the upper valve tape 43 and the filter tape 44 can be produced by a web-like tape.
  • heat sealing is performed while intermittently feeding these tapes in the longitudinal direction, so that a plurality of check valves 10 can be implemented as valve tapes arranged at appropriate intervals.
  • the package 50 with a check valve can be completed by separating and attaching the check valves 10 one by one while feeding the valve tape to the package sheet 51.
  • the check valve 10 can be completed by performing heat sealing while feeding each tape, the check valve 10 having an accurate form can be obtained without positioning in the longitudinal direction of the tape. .
  • accurate positioning can be made relatively accurate and simpler than before.
  • the check valve 10 is arranged inside the package 50.
  • the check valve 10 can be arranged outside the package 50 as shown in FIG.
  • the outflow port 35 can be directly exposed to the outside, but the ventilation sheet 15 can also be disposed above the check valve 10 for the purpose of protecting it.
  • the ventilation sheet 15 is preferably provided with air permeability suitable for fluid discharge, such as being provided with a vent 37 or made of a porous material.
  • the flow of the fluid flowing out from the inside of the package 50 is assumed to be a forward flow, and the flow from the outside to the inside is assumed to be a reverse flow. However, the forward flow and the reverse flow are assumed to have an opposite relationship. It can also be implemented.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Bag Frames (AREA)

Abstract

Provided are a check valve made of sheets and having a plurality of valve flow paths with a new structure, and a package with the check valve, and the object is to improve the reliability of valve operation, in particular, to improve the valve opening performance during forward flow. The check valve comprises a pair of left and right base sheets (11), a filter sheet (14), a pair of left and right lower valve sheets (12) positioned above the filter sheet, and an upper valve sheet (13) disposed above the lower valve sheets. Both front and rear sides of these sheets are closed by front and rear seals (17). The space between the left and right base sheets (11) and the space between the left and right lower valve sheets (12) coincide with each other, and the periphery of this space is fixed in a sealed state by the front and rear seals (17) and an inflow port seal (16) to form an inflow port (32). The upper valve sheet (13) covers the upper side of the inflow port (32), and the fluid from the inflow port (32) passes through the left and right valve flow paths (31) and flows out from both left and right ends of the upper valve sheet (13).

Description

逆止弁及び逆止弁付パッケージCheck valve and package with check valve
本発明は、シート製の逆止弁及び逆止弁付パッケージに関するものである。
従来、コーヒー豆などの穀物を収納する袋状のパッケージにあっては、収納した穀物から発生する気体を袋外部に排出するために、シート製の弁が用いられている。 The present invention relates to a seat check valve and a package with a check valve.
Conventionally, in a bag-like package for storing grains such as coffee beans, a valve made of a sheet has been used to discharge gas generated from the stored grains to the outside of the bag.
この逆止弁は、上記気体の排出に当たって、気体の通過する空間である弁流路が開放及び閉鎖されることにより、順方向の気流の流れを許容し、逆方向の気流を遮断することができるものである。
本願発明者は、逆止弁に関する多くの発明を行なっているが、その一つの従来例として、特許文献１～５に記載された逆止弁があるが、これらの逆止弁は、単一の弁流路を備えるものであった。そのため、パッケージが他の物とひっついて置かれるなどしてその弁流路が閉ざされてしまうと、目的とする順方向の流体の流れが実現しなくなる。 This check valve allows the flow of the forward airflow and shuts off the reverse airflow by opening and closing the valve flow path, which is a space through which the gas passes, in discharging the gas. It can be done.
The inventor of the present application has made many inventions related to check valves, and as one conventional example thereof, there are check valves described in Patent Documents 1 to 5. The valve flow path was provided. For this reason, if the valve flow path is closed due to the package being stuck to another object or the like, the intended forward fluid flow cannot be realized.
特許文献６～８の弁は、袋内が高圧になった際に、その圧力で流入口の上部に配置された弁フィルムを押し上げた流体が、二箇所の流出口から外部に流出するように構成されたものであり、単一の弁流路を備えた特許文献１～５に記載の逆止弁に比して、不用意に弁流路が閉ざされてしまう可能性を少なくすることが出来る。 In the valves of Patent Documents 6 to 8, when the pressure in the bag becomes high, the fluid that pushes up the valve film disposed at the upper part of the inlet by the pressure flows out from the two outlets to the outside. Compared to the check valves described in Patent Documents 1 to 5 having a single valve flow path, the possibility of the valve flow path being inadvertently closed is reduced. I can do it.
ところが、特許文献６～８の弁にあっては、流入口はベースフィルムに開口を設けたものに過ぎない。そのため、弁フィルムとベースフィルムの両フィルムは袋内の圧力を受けるため、両フィルム同士が密着した状態が続く場合があり、開弁が円滑に行わないおそれがある。 However, in the valves of Patent Documents 6 to 8, the inlet is only a base film provided with an opening. Therefore, both the valve film and the base film are subjected to pressure in the bag, so that the state in which the two films are in close contact may continue, and the valve opening may not be performed smoothly.
特許第４４３６９２５号公報Japanese Patent No. 4436925 特許第２６９１８８１号公報Japanese Patent No. 2691881 特許第３０１２９６８号公報Japanese Patent No. 3012968 特許第４７６１４０８号公報Japanese Patent No. 4761408 特開２０１６－９８０１０号公報JP 2016-98010 A 特許第２７５４７５１号公報Japanese Patent No. 2754751 特許第３３４６０３０号公報Japanese Patent No. 3346030 特開昭６３－１５２５５１号公報JP 63-152551 A
本発明の目的は、新たな構造を備えた複数の弁流路を有するシート製の逆止弁の提供を図ることにある。
特に本発明は順流時の開弁性の向上を図るなど、弁の作動の確実性の向上を図ることを課題とする。 An object of the present invention is to provide a seat check valve having a plurality of valve flow paths having a new structure.
In particular, it is an object of the present invention to improve the reliability of valve operation, such as improving the valve opening performance during forward flow.
本発明は、パッケージシートに固定されて用いられるシート製の逆止弁の改良に関する。本発明の逆止弁においては、左右一対のベースシートと、前記ベースシートの上方に位置された左右一対の下弁シートと、前記下弁シートの上方に配置された上弁シートとを備える。 The present invention relates to an improvement in a check valve made of a sheet that is used while being fixed to a package sheet. The check valve according to the present invention includes a pair of left and right base seats, a pair of left and right lower valve seats positioned above the base seat, and an upper valve seat disposed above the lower valve seat.
これらのシートの前後両側は、前後に設けられた前後シールによって、密閉状態で固定されている。左右一対の前記ベースシートの対向するそれぞれの内端辺と、左右一対の前記下弁シート間の対向するそれぞれの内端辺とは、左右の流入口シールによって密閉状態で固定されている。これらの前後の前記前後シールと左右の流入口シールとによって複数枚のシートがシールされることで、上下方向に厚みのある筒状の流入口が構成される。その結果、前記流入口においては、シート単体のものよりも剛性の高いものとなっている。 Both front and rear sides of these sheets are fixed in a sealed state by front and rear seals provided at the front and rear. The opposing inner end sides of the pair of left and right base sheets and the opposing inner end sides of the pair of left and right lower valve seats are fixed in a sealed state by left and right inlet seals. A plurality of sheets are sealed by the front and rear seals and the left and right inlet seals, thereby forming a cylindrical inlet having a thickness in the vertical direction. As a result, the inlet has higher rigidity than that of the single sheet.
前記上弁シートは、左の前記下弁シートから右の前記下弁シートまでの間を前記流入口の上方を含めて覆っている。前記流入口シールは、前記流入口の下方からの流体を前記ベースシートと前記下弁シートとの間に導入させることなく、前記下弁シートと前記上弁シートとの間の弁流路に導くものである。そして前記弁流路内の前記流体は、前記上弁シートの左右両側の端辺から外部に流出するように構成されたものである。 The upper valve seat covers the space from the lower valve seat on the left to the lower valve seat on the right, including above the inlet. The inlet seal guides the fluid from below the inlet to the valve flow path between the lower valve seat and the upper valve seat without introducing the fluid between the base seat and the lower valve seat. Is. And the said fluid in the said valve flow path is comprised so that it may flow out outside from the edge of the both right and left sides of the said upper valve seat.
パッケージ内の流体の圧力が外部の流体の圧力よりも大きくなると、前記逆止弁の全体に上方への圧力が加わる。この圧力の受圧面は、逆止弁の下面に位置するシートである。具体的には、前記流入口の領域では前記上弁シートであり、前記流入口以外の領域では前記ベースシートであるが、前記流入口以外の領域では前記ベースシートの上に前記上弁シートを含む他のシートも重ねられているため、同じく圧力を受ける。その結果、全てのシートが上方への圧力を受けて重なった状態を保つだけで、前記上弁シートと前記下弁シートとの間の流入隙間が広がらない恐れがある。これに対して、本発明にあっては、前後の前記前後シールと左右の流入口シールとによって複数枚のシートがシールされることで、上下方向に厚みのある筒状の流入口が構成されており、前記流入口は、シート単体のものよりも剛性の高いものとなっている。従って、前記上弁シートと前記流入口との間の流入隙間は、両者の剛性の差によって広がりやすいものであり、順流時における円滑な開弁が促進され得るものである。 When the pressure of the fluid in the package becomes larger than the pressure of the external fluid, upward pressure is applied to the entire check valve. The pressure receiving surface is a seat located on the lower surface of the check valve. Specifically, the upper valve seat is in the region of the inlet, and the base sheet is in the region other than the inlet, but the upper valve seat is placed on the base sheet in the region other than the inlet. Since other sheets including it are stacked, they are also subjected to pressure. As a result, there is a possibility that the inflow gap between the upper valve seat and the lower valve seat does not widen only by keeping all the seats overlapped by receiving upward pressure. On the other hand, in the present invention, a plurality of sheets are sealed by the front and rear seals and the left and right inlet seals, thereby forming a cylindrical inlet having a thickness in the vertical direction. The inflow port has higher rigidity than that of the single sheet. Therefore, the inflow gap between the upper valve seat and the inflow port is likely to widen due to the difference in rigidity between the two, and smooth valve opening during forward flow can be promoted.
本発明は、通気性を有するフィルターシートを含めて実施することも望ましい。前記フィルターシートは、前記ベースシートと前記下弁シートとの間、又は、前記ベースシートの下方に、前記流入口を覆うように配置される。前記流入口シールは、左右一対の前記ベースシートの前記内端辺と、左右一対の前記下弁シートの前記内端辺と、前記フィルターシートとの少なくとも３枚のシートをシールしている。前記フィルターシートによって、弁流路への異物の混入が抑制されることはもちろん、前記流入口の剛性をさらに高めることができ、円滑な開弁がさらに促進される。 It is also desirable to implement the present invention including a filter sheet having air permeability. The filter sheet is disposed between the base sheet and the lower valve sheet or below the base sheet so as to cover the inflow port. The inflow port seal seals at least three sheets of the inner end sides of the pair of left and right base sheets, the inner end sides of the pair of left and right lower valve seats, and the filter sheet. The filter sheet not only prevents foreign substances from being mixed into the valve flow path, but can further increase the rigidity of the inflow port, thereby further promoting smooth valve opening.
前記流入口においては、前記下弁シートの下方に配置されてシールされたシートの枚数が、前後の前記前後シールと左右の前記流入口シールとで等しいものである。このように、前記流入口は前記流入隙間の下方において、シールされているシートの枚数が等しい筒状をなすため、筒全体としての剛性が担保される。
他方、前後の前記前後シールでシールされたシートの総枚数は、左右の前記流入口シールでシールされたシートの総枚数よりも多いものである。その結果、筒状の前記流入口は、前後の前記前後シールで支持された状態に保たれる。 At the inlet, the number of seats arranged and sealed below the lower valve seat is the same for the front and rear seals and the left and right inlet seals. Thus, since the inflow port has a cylindrical shape with the same number of sealed sheets below the inflow gap, the rigidity of the entire cylinder is secured.
On the other hand, the total number of sheets sealed by the front and rear seals is larger than the total number of sheets sealed by the left and right inlet seals. As a result, the cylindrical inlet is maintained in a state supported by the front and rear seals.
また本発明は、前記下弁シートと前記上弁シートとの間の前記弁流路の閉鎖性を高める手段を備えたものとして実施することができる。具体的には、前記下弁シートと前記上弁シートとの互いに対向する面の少なくともいずれか一方の面が粘着性を備えたものとするか、又は、前記下弁シートと前記上弁シートとの間の前記弁流路内に密着用液体が配置されたものとするか、少なくともいずれか一方の手段を備えたものとすることができる。
前記流入口は、前後の前記前後シールを短辺とし、左右の前記流入口シールを長辺とした平面視長方形をなすものとして実施することができる。 Moreover, this invention can be implemented as a thing provided with the means to improve the closing property of the said valve flow path between the said lower valve seat and the said upper valve seat. Specifically, at least one surface of the lower valve seat and the upper valve seat facing each other is provided with adhesiveness, or the lower valve seat and the upper valve seat It is assumed that the contact liquid is disposed in the valve flow path between or at least one of the means.
The inflow port can be implemented as a rectangular shape in plan view in which the front and rear seals on the front and rear sides are short sides and the left and right inflow port seals are long sides.
また本発明は、前記パッケージシートによってその少なくとも一部が構成された密閉性を備えたパッケージにおいて、上記の種々の手段を備えた逆止弁が、前記パッケージシートに設けられた開口部を覆うように配置されているものを提供するものである。 According to the present invention, in the package having a sealing property, at least a part of which is constituted by the package sheet, the check valve including the various means described above covers the opening provided in the package sheet. It is intended to provide what is arranged in.
本発明において、上下、左右及び前後は、それぞれの相対的な位置関係を示すに止まり、絶対的な位置を特定したものではないと理解されるべきであり、例えば逆止弁が裏返しにして使用された場合でも相対的な位置関係が本発明の発明特定事項を満たすものであれば、本発明の実施に係る逆止弁であるとみなされるべきである。 In the present invention, it should be understood that the top, bottom, left and right, and front and rear indicate only the relative positional relationship between them, and that the absolute position is not specified. For example, the check valve is used upside down. Even in such a case, if the relative positional relationship satisfies the invention-specific matters of the present invention, it should be regarded as a check valve according to the implementation of the present invention.
本発明は、新たな構造を備えた複数の弁流路を有するシート製の逆止弁を提供することが出来たものである。
また本発明は、順流時の開弁性の向上を図るなど、弁の作動の確実性の向上を図ることが出来たものである。 The present invention is able to provide a seat check valve having a plurality of valve flow paths having a new structure.
In addition, the present invention has been able to improve the certainty of the operation of the valve, such as improving the valve opening performance in forward flow.
（Ａ）本発明の実施の形態に係る逆止弁の平面図、（Ｂ）同逆止弁の底面図。(A) The top view of the non-return valve which concerns on embodiment of this invention, (B) The bottom view of the non-return valve. （Ａ）図１（Ａ）のＡーＡ線断面図、（Ｂ）図１（Ａ）のＢーＢ線断面図。(A) AA line sectional view of Drawing 1 (A), (B) BB line sectional view of Drawing 1 (A). 同逆止弁を形成したテープの切欠斜視図。The notch perspective view of the tape which formed the check valve. 同テープのテープ配置を示す切欠斜視図。The notch perspective view which shows the tape arrangement | positioning of the tape. （Ａ）他の実施の形態に係る逆止弁の中央横断面図、（Ｂ）さらに他の実施の形態に係る逆止弁の中央横断面図。(A) Central cross-sectional view of a check valve according to another embodiment, (B) Central cross-sectional view of a check valve according to still another embodiment. さらにまた他の実施の形態に係る逆止弁の中央横断面図。Furthermore, the center cross-sectional view of the non-return valve which concerns on other embodiment.
以下、図面に基づき本発明の実施の形態を説明する。なお図２～図６の各図におけるシートやテープの間の間隔や厚みは、シートやテープの配置構造を明確に説明するために、実際よりも大きくして描いているもので、逆止弁に流体が通過していない場合、重ねられたシートやテープは実際には互いに接触しているものである。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the spacing and thickness between the sheets and tapes in FIGS. 2 to 6 are drawn larger than the actual ones in order to clearly explain the arrangement structure of the sheets and tapes. When no fluid is passing through, the stacked sheets or tapes are actually in contact with each other.
（概要）
図１から図４に示す実施の形態に係る逆止弁１０は、密閉性を備えた袋状のパッケージ５０を構成するパッケージシート５１の内側にヒートシール、接着剤、粘着剤などの貼り付けシール２１によって、パッケージ５０の開口部５２を内側から覆うように固定されて用いられている。逆止弁１０は発酵などの経時変化に伴い気体を発生させる内容物（例えばコーヒー豆などの穀類やペットフード）を収納するのに適する気密性を備えた袋体や、衣類などの収納物品の減容に適する圧縮袋などのパッケージ５０、言い換えれば、収納物を密封状態で収納した後に内部の流体（具体的には空気であるが他の流動性のある気体や液体であっても構わない）を外部に排出させる機能を備えたパッケージ５０に好適に適用することができる。 (Overview)
The check valve 10 according to the embodiment shown in FIG. 1 to FIG. 4 has an adhesive seal such as a heat seal, an adhesive, or an adhesive on the inner side of a package sheet 51 constituting a bag-like package 50 having airtightness. 21 is fixed and used so as to cover the opening 52 of the package 50 from the inside. The check valve 10 is a bag body having airtightness suitable for storing contents (for example, cereals such as coffee beans or pet food) that generate gas with a change with time, such as fermentation, and storage items such as clothes. A package 50 such as a compression bag suitable for volume reduction, in other words, an internal fluid (specifically, air but other fluid gas or liquid may be used after the storage is stored in a sealed state). ) Can be suitably applied to a package 50 having a function of discharging the outside.
逆止弁１０は図２に示すように、左右のベースシート１１の上にフィルターシート１４が配置され、フィルターシート１４の上に左右の下弁シート１２が配置され、これらの上に上弁シート１３が配置されている。
パッケージ５０内の流体は、その圧力が外部の圧力よりも高まった時に、フィルターシート１４、ベースシート１１、下弁シート１２に設けられた上下方向に伸びる流入口３２を経て、流入隙間３３から下弁シート１２と上弁シート１３の間の弁流路３１を通過して、流出口３５となる流出隙間３４から流出空間３６へ流出する。流出した流体は、パッケージシート５１に設けられた開口部５２からパッケージ５０の外部に流出する。 As shown in FIG. 2, the check valve 10 has a filter sheet 14 disposed on the left and right base sheets 11, a left and right lower valve seat 12 disposed on the filter sheet 14, and an upper valve seat disposed thereon. 13 is arranged.
When the pressure in the package 50 becomes higher than the external pressure, the fluid flows through the inlet 32 provided in the filter sheet 14, the base sheet 11, and the lower valve sheet 12 and extends downward from the inflow gap 33. It passes through the valve flow path 31 between the valve seat 12 and the upper valve seat 13 and flows out from the outflow gap 34 serving as the outflow port 35 to the outflow space 36. The fluid that has flowed out flows out of the package 50 through an opening 52 provided in the package sheet 51.
流体の流出が終わって、パッケージ５０の内外の圧力がほぼ均衡すると、下弁シート１２と上弁シート１３とが密着して、弁が閉じる。パッケージ５０の外部の流体が内部に流入しようとしても、下弁シート１２と上弁シート１３との密着状態が維持され、その流入を許さないものであり、これによって逆止弁としての機能が発揮される。 When the outflow of the fluid is finished and the pressure inside and outside the package 50 is almost balanced, the lower valve seat 12 and the upper valve seat 13 are brought into close contact with each other, and the valve is closed. Even if a fluid outside the package 50 flows into the inside, the close contact state between the lower valve seat 12 and the upper valve seat 13 is maintained, and the inflow is not allowed, thereby functioning as a check valve. Is done.
（各シートについて）
ベースシート１１、下弁シート１２及び上弁シート１３は、柔軟な合成樹脂製シート（例えば、ポリエチレン、ポリプロピレン、PETなどの各種熱可塑性合成樹脂の単体や複合体からなるシート）によって構成することが適している。 (About each sheet)
The base sheet 11, the lower valve sheet 12, and the upper valve sheet 13 may be configured by flexible synthetic resin sheets (for example, sheets made of various thermoplastic synthetic resins such as polyethylene, polypropylene, and PET, or composites). Are suitable.
フィルターシート１４は、合成樹脂製などの不織布や織布などの開口を有する種々のシート体によって構成することができ、パンチングメタル状の金属箔によって構成することも可能であり、これらの複合素材によって構成することも可能である。フィルターシート１４は、収納物の種類とフィルターの使用目的によって開口率やメッシュを種々変更して実施することができるが、いずれの場合にあっても流体の通過を許すものである必要がある。このフィルターシート１４は、収納物が微粉末を含んでおり、その微粉末が弁流路３１の内部に入り込んだりパッケージ５０の外部に流出したりすることを防ぐために設けられるものであるため、収納物が微粉末を含まなかったり発生したりしないものである場合には、省略することができ、図５（Ａ）に示すようにベースシート１１、下弁シート１２及び上弁シート１３のみで実施することができる。また、図５（Ｂ）に示すようにフィルターシート１４をベースシート１１の下方に配置して実施することもできる。 The filter sheet 14 can be composed of various sheet bodies having openings such as non-woven fabrics and woven fabrics made of synthetic resin, etc., and can also be composed of a punching metal-like metal foil. It is also possible to configure. The filter sheet 14 can be implemented with various changes in the aperture ratio and the mesh depending on the type of the stored item and the purpose of use of the filter, but in any case, the filter sheet 14 needs to allow passage of fluid. The filter sheet 14 contains fine powder, and is provided to prevent the fine powder from entering the valve channel 31 or flowing out of the package 50. When the object does not contain or generate fine powder, it can be omitted, and only the base sheet 11, the lower valve sheet 12 and the upper valve sheet 13 are implemented as shown in FIG. can do. Further, as shown in FIG. 5 (B), the filter sheet 14 may be disposed below the base sheet 11 for implementation.
ベースシート１１とフィルターシート１４は、下弁シート１２と上弁シート１３に比べて柔軟性が乏しいものであっても実施することができ、比較的剛性の高い金属箔を用いたり併用したりすることも可能であるし、シートの厚みを下弁シート１２と上弁シート１３に比べて大きいものとして実施することも可能である。
他方下弁シート１２と上弁シート１３は、両者が密着と離反とをなすことによって弁流路３１の開閉がなされるものであり、鋭敏な動きが実現するように十分な柔軟性を備えたもので実施することが好ましい。 Even if the base sheet 11 and the filter sheet 14 are less flexible than the lower valve sheet 12 and the upper valve sheet 13, the base sheet 11 and the filter sheet 14 can be used, and a relatively rigid metal foil is used or used together. It is also possible that the thickness of the seat is larger than that of the lower valve seat 12 and the upper valve seat 13.
On the other hand, the lower valve seat 12 and the upper valve seat 13 open and close the valve flow path 31 when they are brought into close contact with each other, and have sufficient flexibility to realize a sharp movement. It is preferable to carry out with a thing.
（各シートの関係について）
この実施の形態の逆止弁１０を構成する全てのシート（ベースシート１１、下弁シート１２、上弁シート１３、フィルターシート１４）は、全て同じ前後の幅を備え、逆止弁１０の前後長さを規定している。これらのシートは、前後両側の前後シール１７によって密閉状態に固定されている。 (About the relationship between each sheet)
All the seats (the base sheet 11, the lower valve seat 12, the upper valve seat 13, and the filter seat 14) constituting the check valve 10 of this embodiment all have the same front and rear width, and the front and rear of the check valve 10 The length is specified. These seats are fixed in a sealed state by front and rear seals 17 on both front and rear sides.
この例では、これらのシートのうち、フィルターシート１４が最も面積の大きなシートとして実施され、逆止弁１０の全体に及ぶとともにその外形を規定するものであるが、フィルターシート１４は流入口３２を覆うことが出来る大きさに止めて実施しても構わない。 In this example, among these sheets, the filter sheet 14 is implemented as a sheet having the largest area, and covers the entire check valve 10 and defines its outer shape. It may be carried out with a size that can be covered.
ベースシート１１は、流入口３２を挟んで左右一対に配置されたものであり、その左右両側で前後シール１７と左右シール１８によって密閉状態に固定されている。
前後シール１７と左右シール１８とは図１に示すように平面視においてその端同士がつながっており、逆止弁の外周を規定する周囲シール１９を構成する。この例では、その平面形状は矩形をなすが、円形や楕円形など種々の形態で実施することが可能である。
下弁シート１２は、流入口３２を挟んで左右一対に配置されたものであり、その左右長さはベースシート１１よりも短く、左右両端は他のシートと固定されておらず自由状態となっている。 The base sheet 11 is disposed in a pair on the left and right sides with the inlet 32 interposed therebetween, and is fixed in a sealed state by the front and rear seals 17 and the left and right seals 18 on the left and right sides thereof.
As shown in FIG. 1, the front and rear seals 17 and the left and right seals 18 are connected to each other in a plan view, and constitute a peripheral seal 19 that defines the outer periphery of the check valve. In this example, the planar shape is rectangular, but can be implemented in various forms such as a circle and an ellipse.
The lower valve seats 12 are arranged in a pair on the left and right sides with the inflow port 32 interposed therebetween. The left and right lengths of the lower valve seats 12 are shorter than those of the base sheet 11, and the left and right ends are not fixed to other seats and are in a free state. ing.
上弁シート１３は、流入口３２を覆うようにその上に配置されたものであり、その左右長さはベースシート１１よりも短く、左右両端は下弁シート１２の左右両端とほぼ等しい位置に配置されている。上弁シート１３は左の下弁シート１２から右の下弁シート１２までの間を流入口３２の上方を含めて覆っている。 The upper valve seat 13 is disposed thereon so as to cover the inflow port 32, and the left and right length thereof is shorter than that of the base sheet 11, and the left and right ends are substantially equal to the left and right ends of the lower valve seat 12. Has been placed. The upper valve seat 13 covers the space from the left lower valve seat 12 to the right lower valve seat 12 including the upper part of the inflow port 32.
図の例では、上弁シート１３の左右両端は下弁シート１２の左右両端よりも僅かに長く、左右両側に突出しているものが示されているが、両者は全く同じ位置であっても構わないし、下弁シート１２の左右両端が上弁シート１３の左右両端よりも僅かに長いものであっても構わない。
上弁シート１３の左右両端は他のシートと固定されておらず自由状態となっている。 In the example shown in the drawing, the left and right ends of the upper valve seat 13 are slightly longer than the left and right ends of the lower valve seat 12 and protrude from both the left and right sides. Alternatively, the left and right ends of the lower valve seat 12 may be slightly longer than the left and right ends of the upper valve seat 13.
The left and right ends of the upper valve seat 13 are not fixed to other seats and are in a free state.
（流入口３２について）
流入口３２は、左右一対のベースシート１１と下弁シート１２とフィルターシート１４との3枚のシートを、流入口シール１６と前後の前後シール１７とによって固定することにより構成された上下方向に厚みのある筒状の開口である。
この実施の形態では平面視において、流入口３２は、前後の前後シール１７を短辺とし、左右の流入口シール１６を長辺とした平面視長方形の角筒状をなしている。 (About the inlet 32)
The inflow port 32 is formed in a vertical direction configured by fixing three sheets of a pair of left and right base sheets 11, a lower valve sheet 12, and a filter sheet 14 with an inflow port seal 16 and front and rear front and rear seals 17. This is a thick cylindrical opening.
In this embodiment, in plan view, the inflow port 32 has a rectangular tube shape with a rectangular shape in plan view with the front and rear seals 17 as short sides and the left and right inflow seals 16 as long sides.
（流入隙間３３について）
この流入口３２の上端面は上弁シート１３によって覆われており、左右一対の下弁シート１２の内端辺と上弁シート１３との間の隙間が流入隙間３３を構成する。図２（Ｂ）に最もよく示されるように、流入隙間３３は、それぞれ前後の前後シール１７間の全長にわたって前後方向に伸びている。
流入隙間３３は、下弁シート１２と上弁シート１３との間の形成された左右両側に伸びる空間である弁流路３１の入り口となる隙間である。 (About the inflow gap 33)
The upper end surface of the inflow port 32 is covered with the upper valve seat 13, and a gap between the inner end sides of the pair of left and right lower valve seats 12 and the upper valve seat 13 constitutes an inflow gap 33. As best shown in FIG. 2B, the inflow gaps 33 extend in the front-rear direction over the entire length between the front-rear front-rear seals 17, respectively.
The inflow gap 33 is a gap serving as an inlet of the valve flow path 31 that is a space extending between the left and right sides formed between the lower valve seat 12 and the upper valve seat 13.
（弁流路３１について）
図１（Ａ）に最もよく示されるように、この実施の形態では、弁流路３１は平面視において、前後の前後シール１７を短辺とし、左右の流入隙間３３と下弁シート１２の左右両側の端辺を長辺とした長方形をなす。なお上弁シート１３の左右両端が下弁シート１２の左右両端よりも短い場合には、上弁シート１３の左右両端辺が弁流路３１の長辺となる。 (Regarding the valve flow path 31)
As best shown in FIG. 1A, in this embodiment, the valve flow path 31 has the front and rear seals 17 as short sides in plan view, and the left and right inflow gaps 33 and the left and right sides of the lower valve seat 12 Make a rectangle with the long edges on both sides. When the left and right ends of the upper valve seat 13 are shorter than the left and right ends of the lower valve seat 12, the left and right ends of the upper valve seat 13 are the long sides of the valve flow path 31.
流入隙間３３は、下弁シート１２と上弁シート１３の対向する面が密着することによって弁を閉じるものであり、両者が上下に開くことにより弁が開いて流体の通過することを許す。閉弁状態の閉鎖性を高めるためには、下弁シート１２と上弁シート１３の対向する面の少なくともいずれか一方が、粘着性を備えたものであることが好ましい。具体的には、下弁シート１２または上弁シート１３に、その少なくとも一方の面が、粘着性を備えたシートを採用するか、粘着性を備えた塗膜を形成することが好ましい。
また、図２（Ａ）に示すように、下弁シート１２と上弁シート１３との間の弁流路３１内にシリコンなどの密着用液体２２を配置して実施することも好ましい。 The inflow gap 33 closes the valve when the opposing surfaces of the lower valve seat 12 and the upper valve seat 13 are in close contact with each other, and allows the fluid to pass through when the both open up and down. In order to enhance the closing performance in the closed state, it is preferable that at least one of the opposing surfaces of the lower valve seat 12 and the upper valve seat 13 has adhesiveness. Specifically, it is preferable that at least one surface of the lower valve sheet 12 or the upper valve sheet 13 is a sheet having adhesiveness, or a coating film having adhesiveness is formed.
Further, as shown in FIG. 2 (A), it is also preferable to carry out by placing a close contact liquid 22 such as silicon in the valve flow path 31 between the lower valve seat 12 and the upper valve seat 13.
（流出隙間３４と流出口３５について）
左右の流出隙間３４は左右の弁流路３１の下流端であって、流出口３５となるものである。具体的には左右方向において下弁シート１２と上弁シート１３との何か短い方の左右端辺によって規定される。左右の流出隙間３４は、それぞれ前後の前後シール１７間の全長にわたって前後方向に伸びている。 (About outflow gap 34 and outlet 35)
The left and right outflow gaps 34 are downstream ends of the left and right valve flow paths 31 and serve as outlets 35. Specifically, it is defined by the shorter left and right edges of the lower valve seat 12 and the upper valve seat 13 in the left-right direction. The left and right outflow gaps 34 extend in the front-rear direction over the entire length between the front-rear front-rear seals 17.
(流出空間３６について)
流出空間３６は、パッケージシート５１と逆止弁１０の上面との間の領域であり、流出隙間３４から逆止弁１０の外部に流出した流体は一旦流出空間３６に入って、パッケージシート５１に設けられた開口部５２からパッケージ５０の外側へ流出する。流出空間３６の外周は逆止弁１０をパッケージシート５１に密封状態で固定する貼り付けシール２１によって規定されるものである。この貼り付けシール２１は周囲シール１９と重複して設けることができるが、別個の位置に設けても構わない。 (About outflow space 36)
The outflow space 36 is a region between the package sheet 51 and the upper surface of the check valve 10, and the fluid that has flowed out of the check valve 10 from the outflow gap 34 once enters the outflow space 36 and enters the package sheet 51. It flows out of the package 50 from the provided opening 52. The outer periphery of the outflow space 36 is defined by an adhesive seal 21 that fixes the check valve 10 to the package sheet 51 in a sealed state. Although this sticking seal 21 can be provided overlapping with the peripheral seal 19, it may be provided at a separate position.
（シールについて）
流入口シール１６と周囲シール１９と貼り付けシール２１は、所定のシート同士を密閉状態で固定するものであれば特に制限はないが、現在の量産設備ではヒートシールや超音波シールなどの溶融シールとして実施することが望ましい。 (About the seal)
The inlet seal 16, the peripheral seal 19, and the sticker seal 21 are not particularly limited as long as predetermined sheets are fixed in a sealed state. However, in current mass production facilities, a fusion seal such as a heat seal or an ultrasonic seal is used. It is desirable to implement as.
（流体の流れ）
パッケージ５０の内部の流体の圧力が、外部の流体圧力よりも高まった際には、逆止弁１０を構成する全てのシート（ベースシート１１、下弁シート１２、上弁シート１３、フィルターシート１４）がパッケージシート５１に押し付けられる。その際、流入口３２の流体によって、流入口３２の上方の上弁シート１３が下弁シート１２よりも上方に持ち上がることによって、流入隙間３３が開いて、弁流路３１に流体が流入し、流出隙間３４（流出口３５）から流出し、さらに流出空間３６及び開口部５２を経てパッケージ５０の外部に流出する。 (Flow of fluid)
When the pressure of the fluid inside the package 50 becomes higher than the outside fluid pressure, all the sheets constituting the check valve 10 (base sheet 11, lower valve sheet 12, upper valve sheet 13, filter sheet 14). ) Is pressed against the package sheet 51. At that time, the upper valve seat 13 above the inlet 32 is lifted above the lower valve seat 12 by the fluid at the inlet 32, thereby opening the inflow gap 33 and allowing the fluid to flow into the valve flow path 31. It flows out from the outflow gap 34 (outflow port 35), and further flows out of the package 50 through the outflow space 36 and the opening 52.
ここで一般に問題となるのが、内外の圧力差がさほど大きくない場合やゆっくりと圧力差がついていく場合には、下弁シート１２が上弁シート１３に貼り付いた状態となって、流入隙間３３が開きにくい開弁不良の状態が生じる恐れがある点である。これに対して、本発明にあっては、流入口３２は、その周囲が流入口シール１６と前後シール１７とによって規定されており、下弁シート１２及び上弁シート１３よりも硬質となっている。そのために、上弁シート１３は流入口３２よりも自由度が大きく、上弁シート１３だけが、複数枚のシートをシールして剛性が高くなった流入口３２から離れて、持ち上がり易い形態となっているために、開弁不良の発生を抑制することができる。 In general, when the pressure difference between the inside and outside is not so large or when the pressure difference slowly follows, the lower valve seat 12 is attached to the upper valve seat 13 and the inflow gap is a problem. There is a possibility that a state of poor valve opening may occur that makes it difficult for 33 to open. On the other hand, in the present invention, the periphery of the inflow port 32 is defined by the inflow port seal 16 and the front and rear seals 17 and is harder than the lower valve seat 12 and the upper valve seat 13. Yes. Therefore, the upper valve seat 13 has a greater degree of freedom than the inflow port 32, and only the upper valve seat 13 is separated from the inflow port 32, which has a high rigidity by sealing a plurality of sheets, and is easily lifted. Therefore, occurrence of valve opening failure can be suppressed.
この実施の形態では、フィルターシート１４を含めて実施しているため、流入口３２は、ベースシート１１と下弁シート１２とフィルターシート１４との三者が溶融シールなどのシールによって一体となって硬質化されているとともに、上下方向にも長さを備えた筒状となっているために、上弁シート１３が流入口３２から、より離れやすいものとなっている。なおこの流入口３２の溶融シールは、その上部表面に上下に凹凸をつけたり粗面にしたりして実施することもできる。 In this embodiment, since the filter sheet 14 is included, the inflow port 32 is integrated with the base sheet 11, the lower valve sheet 12, and the filter sheet 14 by a seal such as a fusion seal. The upper valve seat 13 is more easily separated from the inlet 32 because it is hardened and has a cylindrical shape with a length in the vertical direction. It should be noted that the melt sealing of the inlet 32 can be carried out by making the upper surface uneven or rough on the upper surface.
またこの実施の形態では、前述のように、流入口３２が、前後の前後シール１７を短辺とし、左右の流入口シール１６を長辺とした平面視長方形をなしている。そのため、流入口３２に前後方向に十分な長さを与えることができる。そして、上弁シート１３と流入口３２との間のどこか一箇所に隙間ができて、流体が弁流路３１に流入することができれば、流入隙間３３はその全長にわたって開くことができるため、この点からも開弁不良の発生を抑制するのに有利な形態となっている。 Further, in this embodiment, as described above, the inflow port 32 has a rectangular shape in a plan view in which the front and rear front and rear seals 17 have short sides and the left and right inflow port seals 16 have long sides. Therefore, a sufficient length can be given to the inflow port 32 in the front-rear direction. And, if there is a gap somewhere between the upper valve seat 13 and the inlet 32 and the fluid can flow into the valve flow path 31, the inflow gap 33 can be opened over its entire length, From this point as well, it is an advantageous form for suppressing the occurrence of defective valve opening.
なお、図では、ベースシート１１と下弁シート１２のそれぞれの内端辺の位置と、左右の流入口シール１６の位置とは、完全に一致している状態として描かれているが、製造時のテープの蛇行などを考慮して、左右の流入口シール１６は、ベースシート１１と下弁シート１２のそれぞれの内端辺よりも少し外側の位置をシールするようにしても構わない。言い換えれば、ベースシート１１と下弁シート１２の内端辺が、左右の流入口シール１６から流入口３２の内側に少しはみ出しているものであっても構わない。 In the drawing, the positions of the inner end sides of the base sheet 11 and the lower valve seat 12 and the positions of the left and right inlet seals 16 are depicted as being completely coincident with each other. In consideration of the meandering of the tape, the left and right inlet seals 16 may be sealed at positions slightly outside the inner end sides of the base sheet 11 and the lower valve sheet 12, respectively. In other words, the inner end sides of the base sheet 11 and the lower valve seat 12 may slightly protrude from the left and right inlet seals 16 to the inside of the inlet 32.
（ウエブ状のテープについて）
図３及び図４に示すように、量産に際しては、ベースシート１１、下弁シート１２、上弁シート１３及びフィルターシート１４の各シートは、その前後方向に伸びるベーステープ４１、下弁テープ４２、上弁テープ４３及びフィルターテープ４４のウエブ状のテープによって生産することができる。製造時にはこれらのテープを間歇的に長手方向に送りながらヒートシールを施すことによって、複数の逆止弁１０が適宜間隔を置いて配列された弁テープとして実施することができる。使用に際しては、パッケージシート５１に対して弁テープを送りながら、ひとつずつの逆止弁１０を切り離して貼り付けることにより、逆止弁付のパッケージ５０を完成させることができる。 (About web-like tape)
As shown in FIGS. 3 and 4, in mass production, each of the base sheet 11, the lower valve sheet 12, the upper valve sheet 13, and the filter sheet 14 includes a base tape 41, a lower valve tape 42, The upper valve tape 43 and the filter tape 44 can be produced by a web-like tape. At the time of manufacture, heat sealing is performed while intermittently feeding these tapes in the longitudinal direction, so that a plurality of check valves 10 can be implemented as valve tapes arranged at appropriate intervals. In use, the package 50 with a check valve can be completed by separating and attaching the check valves 10 one by one while feeding the valve tape to the package sheet 51.
このように、各テープを送りながらヒートシールを施すことで逆止弁１０を完成することができるため、テープの長手方向における位置決めを行わずとも正確な形態の逆止弁１０を得ることができる。今日においては、センサーや数値制御技術の発達により、正確な位置決めは従来よりも比較的正確かつ簡単になすことができるが、量産性を高めるためにテープの送り速度を高めれば高めるほど、位置決の精度を高めることが困難となる。従ってこの実施の形態に係る逆止弁１０の構造は量産性の向上に適する構造と言える。 Thus, since the check valve 10 can be completed by performing heat sealing while feeding each tape, the check valve 10 having an accurate form can be obtained without positioning in the longitudinal direction of the tape. . Today, with the development of sensors and numerical control technology, accurate positioning can be made relatively accurate and simpler than before. However, the higher the tape feed speed is, the higher the positioning is. It is difficult to increase the accuracy of the. Therefore, it can be said that the structure of the check valve 10 according to this embodiment is a structure suitable for improving mass productivity.
（変更例）
上記の実施の形態では、パッケージ５０の内側に逆止弁１０を配置したが、図６に示すように、パッケージ５０の外側に逆止弁１０を配置して実施することもできる。その際、流出口３５は直接外部に露出させることもできるが、それを保護するためなどを目的として、通気シート１５を逆止弁１０の上側に配置することもできる。通気シート１５は、通気口３７を備えるものとしたり多孔質材料で構成したりするなど、流体の排出に適する通気性を備えたものであることが好ましい。
またこの例では、パッケージ５０の内部から外部へ流出する流体の流れを順流とし、外部から内部への流れを逆流としたものとして実施しているが、順流と逆流を反対の関係となるものとして実施することもできる。 (Example of change)
In the above embodiment, the check valve 10 is arranged inside the package 50. However, the check valve 10 can be arranged outside the package 50 as shown in FIG. At that time, the outflow port 35 can be directly exposed to the outside, but the ventilation sheet 15 can also be disposed above the check valve 10 for the purpose of protecting it. The ventilation sheet 15 is preferably provided with air permeability suitable for fluid discharge, such as being provided with a vent 37 or made of a porous material.
In this example, the flow of the fluid flowing out from the inside of the package 50 is assumed to be a forward flow, and the flow from the outside to the inside is assumed to be a reverse flow. However, the forward flow and the reverse flow are assumed to have an opposite relationship. It can also be implemented.
１０　逆止弁
１１　ベースシート
１２　下弁シート
１３　上弁シート
１４　フィルターシート
１５　通気シート
１６　流入口シール
１７　前後シール
１８　左右シール
１９　周囲シール
２１　貼り付けシール
２２　密着用液体
３１　弁流路
３２　流入口
３３　流入隙間
３４　流出隙間
３５　流出口
３６　流出空間
３７　通気口
４１　ベーステープ
４２　下弁テープ
４３　上弁テープ
４４　フィルターテープ
５０　パッケージ
５１　パッケージシート
５２　開口部 DESCRIPTION OF SYMBOLS 10 Check valve 11 Base sheet 12 Lower valve sheet 13 Upper valve sheet 14 Filter sheet 15 Ventilation sheet 16 Inlet seal 17 Front and rear seal 18 Left and right seal 19 Peripheral seal 21 Adhesive seal 22 Adhesive liquid 31 Valve flow path 32 Inlet 33 Inflow gap 34 Outflow gap 35 Outlet 36 Outflow space 37 Vent 41 Base tape 42 Lower valve tape 43 Upper valve tape 44 Filter tape 50 Package 51 Package sheet 52 Opening

Claims (6)

  1. パッケージシートに固定されて用いられるシート製の逆止弁において、
    左右一対のベースシートと、前記ベースシートの上方に位置された左右一対の下弁シートと、前記下弁シートの上方に配置された上弁シートとを備え、
    これらのシートの前後両側は、前後に設けられた前後シールによって、密閉状態で固定されており、
    左右一対の前記ベースシートの対向するそれぞれの内端辺と、左右一対の前記下弁シート間の対向するそれぞれの内端辺とは、左右の流入口シールによって密閉状態で固定されており、
    前記下弁シートとその下方に配置されたシートとの複数枚のシートが、前後の前記前後シールと左右の前記流入口シールとにより、シールされることによって、上下方向に厚みのある筒状の流入口が構成され、
    前記上弁シートは、左の前記下弁シートから右の前記下弁シートまでの間を前記流入口の上方を含めて覆っており、
    前記流入口シールは、前記流入口の下方からの流体を前記ベースシートと前記下弁シートとの間に導入させることなく、前記下弁シートと前記上弁シートとの間の弁流路に導くものであり、
    前記上弁シートの左右両側の端辺から前記弁流路内の前記流体が外部に流出するように構成されたことを特徴とする逆止弁。     In a check valve made of a sheet that is fixed to a package sheet,
    A pair of left and right base seats, a pair of left and right lower valve seats positioned above the base seat, and an upper valve seat disposed above the lower valve seat,
    The front and rear sides of these seats are fixed in a sealed state by front and rear seals provided at the front and rear,
    The opposing inner end sides of the pair of left and right base sheets and the opposing inner end sides of the pair of left and right lower valve seats are fixed in a sealed state by left and right inlet seals,
    A plurality of sheets of the lower valve seat and a sheet disposed below the lower valve seat are sealed by the front and rear seals and the left and right inlet seals, so that a cylindrical shape having a thickness in the vertical direction is formed. An inflow port is constructed,
    The upper valve seat covers the space from the lower valve seat on the left to the lower valve seat on the right, including above the inflow port,
    The inlet seal guides the fluid from below the inlet to the valve flow path between the lower valve seat and the upper valve seat without introducing the fluid between the base seat and the lower valve seat. Is,
    A check valve characterized in that the fluid in the valve flow path flows out from the left and right edges of the upper valve seat.
  2. 前記ベースシートと前記下弁シートとの間、又は、前記ベースシートの下方に、通気性を有するフィルターシートが、前記流入口を覆うように配置されており、
    前記流入口シールは、左右一対の前記ベースシートの前記内端辺と、左右一対の前記下弁シートの前記内端辺と、前記フィルターシートとの少なくとも３枚のシートをシールしており、
    前記流入口において、前記下弁シートの下方に配置されてシールされたシートの枚数が、前後の前記前後シールと左右の前記流入口シールとで等しいことを特徴とする請求項１記載の逆止弁。     Between the base sheet and the lower valve sheet, or below the base sheet, a breathable filter sheet is disposed so as to cover the inflow port,
    The inlet seal seals at least three sheets of the inner end sides of the pair of left and right base sheets, the inner end sides of the pair of left and right lower valve seats, and the filter sheet;
    2. The check according to claim 1, wherein the number of seats arranged and sealed below the lower valve seat at the inflow port is equal between the front and rear seals and the left and right inflow port seals. valve.
  3. 前後の前記前後シールでシールされたシートの枚数が、左右の前記流入口シールでシールされたシートの枚数よりも多いことを特徴とする請求項１又は２に記載の逆止弁。 3. The check valve according to claim 1, wherein the number of sheets sealed by the front and rear seals is larger than the number of sheets sealed by the left and right inlet seals.
  4. 前記下弁シートと前記上弁シートとの互いに対向する面の少なくともいずれか一方の面が粘着性を備えたものであるか、前記下弁シートと前記上弁シートとの間の前記弁流路内に密着用液体が配置されたものであるかの、少なくともいずれか一方の手段を備えることにより、前記弁流路の閉鎖性が高められたことを特徴とする請求項１又は２に記載の逆止弁。 The valve flow path between the lower valve seat and the upper valve seat, or at least one of the opposing surfaces of the lower valve seat and the upper valve seat is adhesive. The closing property of the valve flow path is improved by providing at least one of the means in which a close-contact liquid is disposed therein. Check valve.
  5. 前記流入口は、前後の前記前後シールを短辺とし、左右の前記流入口シールを長辺とした平面視長方形をなす筒状の空間であることを特徴とする請求項１又は２に記載の逆止弁。 The said inflow port is the cylindrical space which makes the planar view rectangle which made the said front and back said front-and-rear seal a short side, and made the left and right inflow-port seals a long side, The Claim 1 or 2 characterized by the above-mentioned. Check valve.
  6. 前記パッケージシートによってその少なくとも一部が構成された密閉性を備えたパッケージにおいて、
    請求項１又は２に記載の逆止弁が、前記パッケージシートに設けられた開口部を覆うように配置されていることを特徴とする逆止弁付パッケージ。     In a package with hermeticity, at least part of which is constituted by the package sheet,
    A package with a check valve, wherein the check valve according to claim 1 or 2 is disposed so as to cover an opening provided in the package sheet.
PCT/JP2018/020945 2018-05-31 2018-05-31 Check valve and package with check valve WO2019229928A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3346030B2 (en) * 1994-04-18 2002-11-18 藤森工業株式会社 Degassing valve label
WO2012090337A1 (en) * 2010-12-29 2012-07-05 有限会社田中テクニカル Check valve and storage body equipped with same
JP6239170B1 (en) * 2017-03-16 2017-11-29 丸天産業株式会社 Gas vent valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3346030B2 (en) * 1994-04-18 2002-11-18 藤森工業株式会社 Degassing valve label
WO2012090337A1 (en) * 2010-12-29 2012-07-05 有限会社田中テクニカル Check valve and storage body equipped with same
JP6239170B1 (en) * 2017-03-16 2017-11-29 丸天産業株式会社 Gas vent valve

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