WO2013157509A1 - Check valve device - Google Patents

Check valve device Download PDF

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Publication number
WO2013157509A1
WO2013157509A1 PCT/JP2013/061150 JP2013061150W WO2013157509A1 WO 2013157509 A1 WO2013157509 A1 WO 2013157509A1 JP 2013061150 W JP2013061150 W JP 2013061150W WO 2013157509 A1 WO2013157509 A1 WO 2013157509A1
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WO
WIPO (PCT)
Prior art keywords
film
flow path
bag
heat
bent flow
Prior art date
Application number
PCT/JP2013/061150
Other languages
French (fr)
Japanese (ja)
Inventor
克敏 吉房
宏恭 吉房
Original Assignee
G.E.S.株式会社
エアーピエンシーインコーポレーテッド
ソン ジェード
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by G.E.S.株式会社, エアーピエンシーインコーポレーテッド, ソン ジェード filed Critical G.E.S.株式会社
Priority to JP2014511204A priority Critical patent/JP6038891B2/en
Publication of WO2013157509A1 publication Critical patent/WO2013157509A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/05Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D81/051Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using pillow-like elements filled with cushioning material, e.g. elastic foam, fabric
    • B65D81/052Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using pillow-like elements filled with cushioning material, e.g. elastic foam, fabric filled with fluid, e.g. inflatable elements

Definitions

  • the present invention relates to a check valve device for automatically stopping gas discharge in a state where gas is filled in a bag portion made of a film that can be heat-sealed at least on one side, and in particular in a sealed state.
  • the present invention relates to a check valve device that can easily form a valve portion by heat-sealing (heat-sealing) the first film and the second film in a predetermined shape into a predetermined shape.
  • an air-injection type air cell cushioning material when manufacturing a packaging material having a cushioning function by air, an air-injection type air cell cushioning material is known, and this air-injection type air cell cushioning material heat-seals two films, A structure in which a large number of air cells are connected to each other is formed, and a simple air inlet is provided at the end. Usually, air is injected from the inlet at the end, and then the inlet is heat-sealed.
  • a special inlet check valve is attached to the end of the air introduction passage provided in front of the check valve portion, and each air cell is passed through the inlet check valve and the check valve portion. I try to inject air.
  • this check valve for entrance cannot be manufactured by a normal film heat sealing process because of its complicated structure. For this reason, it is necessary to bring the check valve for the inlet manufactured in a separate manufacturing process into the manufacturing process (heat sealing process) of the air cell cushioning material, and heat-weld it to the valve insertion position.
  • the manufacturing equipment inevitably had a complicated structure and increased size.
  • the present invention solves the above-mentioned problems, and when the film bag portion is filled with gas, the gas holding performance is high, the atmospheric pressure in the bag portion can be maintained for a long time, and the structure is simple.
  • An object of the present invention is to provide a check valve device that can be manufactured at low cost.
  • Another object of the present invention is to provide an air cell cushioning material that can maintain the air pressure in the air cell for a long period of time, and that is simple in structure and can be manufactured at low cost.
  • the present inventor has thermally fused the gas injection path to a specific shape even in a structure in which only the first film and the second film are overlapped.
  • the gas pressure in the bag portion can be increased while the film bag portion is filled with gas through the check valve portion without using a separately manufactured inlet check valve.
  • the inventors have found that it can be maintained over a period of time, and have reached the following invention.
  • the check valve device includes a first film and a second film that are overlapped, a peripheral portion is heat-sealed to form a bag portion, and the bag portion is formed from a gas injection path provided at an end portion of the bag portion.
  • a check valve device provided in the gas injection path for injecting gas into the gas injection path A bent flow path as a gas flow path that continues from the gas injection path into the bag portion is formed by a heat-sealed wire in which the first film and the second film are heat-sealed linearly, and the bent flow There is a valve in the road,
  • the gas is injected into the bag part through the valve part of the gas injection path and the bent flow path, and the filling is completed and the gas pressure is applied to the bag part, the first film on the bag part side Due to the expansion of the second film due to the gas pressure, a first expansion portion and a second expansion portion are formed in a part of the first film and the second film via a heat-sealing line that forms the bent flow path.
  • the first film and the second film of the valve section in the bent flow path are pulled and pressed by the first expansion section and the second expansion section so that they are in close contact with each other, and the valve section of the bent flow path is It is hermetically sealed.
  • the check valve device of the present invention when the gas is injected into the bag part from the gas injection path through the bent flow path, and the filling is completed and the gas pressure is applied to the bag part, the first film on the bag part side And the expansion of the second film form a first expansion portion and a second expansion portion, and the first expansion portion and the second expansion portion are connected to the first of the valve portion in the bent flow path via the heat-sealing line.
  • the film between the film 1 and the second film is pulled and pressed, and the folded flow path and the valve part film shrink to cause wrinkles, and the wrinkled film comes into close contact with each other, so the valve part after gas filling is sealed. be able to.
  • the 1st film and 2nd film which comprise a bag part can form a bent flow path by a heat fusion line, and can form a check valve device which uses that as a valve part.
  • the number of parts is small, it is possible to manufacture a film bag that is useful for environmental conservation and is filled with gas at a very low cost.
  • first film and the second film can be formed from separate films, but the continuous film may be bent to form the first film and the second film, and the bag portion may be formed by heat fusion. it can.
  • the width of the valve portion of the bent flow path is shorter than 1/4 of the width of the bag portion and longer than 1/25 of the width thereof, and the width of the valve portion is the same as when the bag portion is expanded.
  • the first and second inflating portions are formed to be shorter than 1/4 of the maximum expansion width and longer than 1/25 of the maximum expansion width.
  • gas injection path is formed substantially perpendicular to the bent flow path, and a gas injection port can be formed at the end of the gas injection path.
  • gas injection path and the bent flow path can be formed integrally, and a gas injection port can be formed at the end of the bent flow path.
  • bent flow path can be formed outside the bag portion and in a part of a heat-sealing line that is formed in the gas injection passage and partitions the bag portion and the gas injection passage.
  • valve portion of the bent flow path can be provided in an air injection path of an air cell cushioning material that forms a plurality of air cells by linearly heat-sealing the first film and the second film.
  • each air cell can be provided with a bent flow path having the valve portion.
  • the air cell cushioning material of the present invention includes a first film and a second film, and a peripheral portion is heat-sealed to form a bag portion that becomes a plurality of air cells, and a gas provided at an end of the bag portion.
  • the bent flow path is a gas flow path that continues from the gas injection path into the bag portion by a heat-sealing line in which the first film and the second film are heat-sealed linearly.
  • a valve portion is provided in the bent flow path, When the gas is injected into the bag part through the valve part of the gas injection path and the bent flow path, and the filling is completed and the gas pressure is applied to the bag part, the first film on the bag part side As a result of the expansion of the second film by the gas pressure, a first expansion portion and a second expansion portion are formed in a part of the first film and the second film via a heat-sealing line that forms the bent flow path. The first film and the second film of the valve section in the bent flow path are pulled and pressed by the first expansion section and the second expansion section to be in close contact with each other, and the bent flow path The valve portion is hermetically sealed.
  • the air cell cushioning material of the present invention only the first film and the second film constituting the air cell are used to form a bent flow path by heat-sealing lines, and the above check is made on the valve portion in the bent flow path. Since the valve device is provided, it is not necessary to attach an inlet check valve having a special structure to the inlet of the air cell as in the prior art. Further, it is not necessary to use heat-resistant printing or special valve members, the safety in using the product is improved, and since the number of parts is small, it can be manufactured very inexpensively and easily.
  • the valve portion can be formed only by heat-sealing the first film and the second film into a predetermined shape, the check manufactured in a separate process
  • the structure is simple and it can be manufactured at low cost, and the gas holding performance is high, maintaining the atmospheric pressure in the film bag (air cell) for a long time. can do.
  • there is no need to use heat-resistant printing or special valve members the safety in using the product is improved, and since the number of parts is small, it can be used for environmental conservation.
  • FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIG. 1 in which the thickness of the film is emphasized. It is a side view of the air cell shock absorbing material of the state which injected and filled air in the air cell.
  • FIG. 3 is a schematic cross-sectional view corresponding to FIG. 2 in a state where air is injected and filled in an air cell. It is a disassembled perspective view which shows a 1st film, a 2nd film, and a heat sealing
  • FIG. 1 to 7 show an air cell cushioning material 20 to which the check valve device 1 of the present invention is applied.
  • this air cell cushioning material 20 can be thermally fused on both sides or one side. It is composed of a first film 2 and a second film 3, and the peripheral portions of the first film 2 and the second film 3 are heat-sealed by a heat-sealing wire 14, and further, a lattice-like heat-sealing boundary line 15 inside.
  • the heat-sealing boundary line 18 is heat-sealed vertically and horizontally, whereby a large number of bag portions (air cells) 4 are formed vertically and horizontally.
  • a check valve device 1 is formed on the upper portion of the bag portion 4 of each row.
  • a single-layer plastic film can be used, but it is desirable to use a functional film having two or more layers from the viewpoint of gas barrier properties and heat sealability.
  • first film 2 and the second film 3 when a two-layer plastic film is used for the first film 2 and the second film 3, a gas barrier nylon or the like can be used for the outer layer, and LLDPE can be used for the inner layer.
  • LLDPE low-density polyethylene
  • the first film 2 and the second film 3 are heat-sealed by using LLDPE for the outer layer and nylon or the like for the inner layer. It is also possible to apply heat fusion in a state in which the first film 2 and the second film 3 that are attached are further folded.
  • the layer in this case is a case where a binder etc. are not included as a layer.
  • the effect of mutual adhesion by tension and pressing of the first film 2 and the second film 3 of the check valve device 1 can be further enhanced together with the adhesiveness. It has been found by conducting research.
  • the first film 2 and the second film 3 are preferably plastic films having a thickness of about 20 ⁇ m to about 300 ⁇ m.
  • the lattice-like heat fusion boundary line 15 and the heat fusion boundary line 18 forming the bag portion 4 are composed of a long heat fusion boundary line 15 and a short heat fusion boundary line 18 as shown in FIG.
  • a gas injection path 5 is formed at the upper end of the air cell cushioning material 20 by a heat fusion line 14 and a heat fusion boundary line 19 provided in parallel, and an inlet 9 is formed at the end of the gas injection path 5. It is open. Note that air is normally injected into the bag portion 4 of the air cell buffer material 20, but of course, a gas such as nitrogen can also be injected, and the air inlet of the air cell buffer material 20 serves as the gas injection path 5. Formed as.
  • a large number of bag portions (air cells) 4 of the air cell cushioning material 20 are formed as a plurality of stages of bag portions 4 connected in a plurality of rows below the gas injection path 5, each of which is a heat-sealing boundary line 18. Is formed in parallel with the gas injection path 5 and the thermal fusion boundary 15 is formed in the vertical direction. Cell flow paths 17 are provided at both ends of the heat fusion boundary line 18 of each stage provided in the horizontal direction, and each column is connected to the heat fusion boundary line 19 at the top (below the gas injection path 5).
  • a check valve device 1 is provided for filling the bag portion 4. The air injected from the inlet 9 at the end of the gas injection path 5 is passed through each check valve device 1, and all the bag parts 4 are filled with air from the bag part 4 through the lower cell flow path 17. It has become.
  • the check valve device 1 arranged at the inlet position of the bag portion 4 in each row is a portion continuing into the bag portion 4 as a branch passage from the gas injection passage 5, and between the first film 2 and the second film 3,
  • the heat-sealing wires 11, 12, and 13 are heat-sealed linearly to form a bent flow path 6, and the bent flow path 6 is configured as a valve portion 10.
  • the valve portion 10 of the bent flow path 6 has a bent shape bent substantially at a right angle, and has a width and a shape capable of functioning as a check valve.
  • the check valve device 1 is configured by providing a valve portion 10 in a bent flow path 6, and the bent flow path 6 having the valve portion 10 is located below the gas injection path 5.
  • the valve inlet 6a is formed in a part of the heat fusion boundary line 19 of the heat fusion line 19, and the heat fusion wires 11 and 12 are vertically extended downward from the valve inlet 6a.
  • the lower end of the wire 11 is bent at a substantially right angle toward the other heat-sealing wire 12 to form a heat-sealing wire 13 substantially parallel to the gas injection path 5, and the tip of the other heat-sealing wire 12 is heat-sealed.
  • a valve outlet 6b is formed between the line 13 and the line 13.
  • the check valve device 1 is configured by forming the bent flow path 6 between the first film 2 and the second film 3 by the three heat-sealing wires 11, 12, and 13. 10 is simply formed between the first film 2 and the second film 3 in the bent flow path 6. That is, when the gas is filled, as shown in FIGS. 3 to 7, the bag portion 4 expands. At this time, the first expansion portion 7 of the first film 2 and the second expansion portion 8 of the second film 3 The first expansion part 7 of the first film 2 and the second expansion part 8 of the second film 3 are formed in the vicinity of the check valve device 1 and are valved from both sides via heat-sealing wires 11 and 12 during expansion. The film of the portion 10 is pulled and pressed, the first film 2 and the second film 3 are brought into close contact with each other by the tensile force and pressing force, and the function as the valve portion 10 that seals the bent flow path 6 is performed. ing.
  • the check valve device 1 completes filling by injecting gas into the bag part 4 through the gas injection path 5 and the bent flow path 6, and the gas pressure is applied to the bag part 4, the bag part 4 And the first film 2 and the second film 3 on the bag part 4 side are expanded by the gas pressure, and the first expansion part 7 and the first film 7 are connected to the first expansion part 7 via the heat-sealing wires 11 and 12 on both sides of the bent flow path 6.
  • the expansion part 8 pulls and presses the first film 2 and the second film 3 of the valve part 10 in the bent flow path 6 so that the valve part 10 of the bent flow path 6 is brought into close contact with each other. Configured to close.
  • the channel width A width of the narrowest part of the bent channel
  • the channel width A is important. If the flow path width A is too large relative to the width of the bag part 4, the internal gas tends to flow backward and leak easily, and if the flow path width A is small, the air is injected into the bag part 4 using an air pump or the like. At this time, pressure loss increases, and it is difficult to inject gas efficiently.
  • the flow path width A is formed to be shorter than 1/4 of the width W of the bag portion 4 and longer than 1/25 of the width W, and when the bag portion 4 is expanded.
  • the first expansion portion 7 and the second expansion portion 8 are formed to be shorter than 1/4 of the maximum expansion width Wx (FIG. 3) and longer than 1/25 of the maximum expansion width Wx. Accordingly, when the bag portion 4 is filled with gas, the first film 2 of the valve portion 10 is caused by the tensile force and the pressing force of the first expansion portion 7 of the first film 2 and the second expansion portion 8 of the second film 3. And the second film 3 can be brought into close contact with each other.
  • this check valve device 1 when the flow path width A of the valve portion 10 is wider than 1 ⁇ 4 of the width W of the bag portion 4, the adhesion of the valve portion 10 is likely to be reduced.
  • the flow path width A of 10 is shorter than 1/25 of the maximum expansion width Wx of the first expansion portion 7 and the second expansion portion 8, the pressure loss at the valve portion 10 when air is injected is reduced. It is very increased and is likely to hinder air injection.
  • the flow path width A is shorter than 1/7 of the width W of the bag portion 4 and longer than 1/19 of the width W, and the first inflating portion 7 when the bag portion 4 is inflated. It is preferable to form the second expansion portion 8 shorter than 1/7 of the maximum expansion width Wx (FIG. 3) and longer than 1/19 of the maximum expansion width Wx. Specifically, for example, when the bag portion 4 has a width W of about 40 mm and the maximum expansion width Wx of the first inflatable portion 7 and the second inflatable portion 8 is about 35 mm, the flow path width A is: It is preferable to be less than about 20 mm and about 2.0 mm or more.
  • the flow path width A of the valve portion 10 can be in the range of about 0.8 mm to about 20 mm.
  • the check valve device 1 having the above-described configuration is disposed between the upper gas injection path 5 of the air cell cushioning material 20 made of the first film 2 and the second film 3 and the lower bag portion 4 (air cell).
  • the gas (air) injected from the gas injection path 5 is injected into each bag portion 4 through each check valve device 1 and filled.
  • the air cell cushioning material having the above configuration is formed by cutting the first film 2 and the second film 3 into a rectangular shape having a predetermined size and superimposing them to form a linear heat-sealing line at a predetermined position.
  • the peripheral portions of the first film 2 and the second film 3 are heat-sealed by the heat-sealing wire 14, and the gas injection path 5 is formed by the heat-sealing boundary line 19 and the heat-sealing wire 14 in the upper horizontal direction.
  • the end portion is opened to form the injection port 9.
  • the check valve device 1 is formed by the heat-sealing lines 11, 12, 13 between the heat-sealing boundary line 19 and the bag part 4 formed below the heat-sealing boundary line 19.
  • air gas
  • air is injected into each bag portion 4 of the air cell cushioning material 20 using, for example, a small air injector (air pump).
  • air pump air pump
  • a nozzle of an air pump (not shown) is inserted into the inlet 9 at the end of the gas injection path 5, and air is passed through the check valve device 1 from the gas injection path 5 into each bag part 4. Fill.
  • the bag parts 4 expand as shown in FIGS. 3 to 7, and accordingly, the first film and the first film of the bag part 4 are expanded.
  • the first expansion portion 7 and the second expansion portion 8 are formed by the first film 2 and the second film 3 on both sides of the bent flow path 6 of each check valve device 1, that is, on both sides of the valve portion 10. Is done.
  • the first film 2 of the valve section 10 in the bent flow path 6 is caused by the tensile force and the pressing force of the first expansion section 7 and the second expansion section 8 via the heat-sealing wires 11 and 12 of the valve section 10.
  • the second film 3 are brought into close contact with each other.
  • first expansion portion 7 and the second expansion portion 8 are tensioned and pressed between the first film 2 and the second film 3 of the valve portion 10 in the bent flow path 6 via the heat-sealing wires 11 and 12. Then, since the film of the bent flow path 6 and the valve portion 10 is contracted and wrinkled, and the wrinkled films are in close contact with each other, the valve portion 10 after gas filling is sealed.
  • each check valve device 1 is sealed, filling of the air cell cushioning material 20 is completed, and each bag portion 4 is held in an inflated state.
  • the sealed state at this time is twisted or wrinkled in the film of the valve portion 10 due to the tensile force of the first and second inflating portions 7 and 8. 10 closures can be easily confirmed.
  • the air cell cushioning material 20 is formed by the bag part 4 and the check valve device 1 by a very simple process in which a heat-sealing line is formed between the first film 2 and the second film 3 on the front and back sides.
  • the check valve device 1 is formed only by the first film 2 and the second film 3 constituting the bag portion 4 and forms a bent flow path 6 by heat-sealing lines. Since it can be configured to be the valve portion 10, it is not necessary to attach a check valve for an inlet having a special structure to the inlet of the bag portion as in the prior art, and it can be manufactured very cheaply and easily. it can.
  • the valve portion 10 having the bent flow path 6 is provided only in the bag portion 4 adjacent to the gas injection path 5, but as shown in FIG.
  • the valve portions 10 having the bent flow paths 6 can be provided in all the plurality of bag portions 4.
  • the valve part 10 is formed at the thermal fusion boundary line 19 between the bag parts 4 adjacent in the vertical direction.
  • the valve part 10 provided in the some bag part 4 can also be formed in the heat sealing
  • a branch gas injection path extending in the multi-stage direction is provided in the gas injection path 5 in the upper lateral direction of the air cell cushioning material 20 with respect to the plurality of bag portions 4 formed in a multi-stage shape there.
  • 5a may be vertically connected and air may be injected from the gas injection path 5 through the branch gas injection path 5a to the lower bag section 4 through the valve section 10.
  • the heat-sealing line 11 can also be provided with an inclination rather than a right angle with respect to the heat-sealing boundary line 19.
  • the bent flow path 6 has a wider valve inlet 6a, and air can be injected better.
  • the air cell cushioning material of each example and comparative example was formed in a size of 150 ⁇ 390 mm by overlapping a first film of 150 ⁇ 390 mm and a second film of 150 ⁇ 390 mm and heat-sealing a predetermined portion.
  • 40 air cells having a maximum expansion width of 30 ⁇ 30 mm were formed in 4 columns and 10 rows.
  • a multi-layer co-pressed film having a gas barrier property with a thickness of 75 ⁇ m was used for the first film and the second film.
  • the flow path width A of the valve part was set to 21 mm, and in Examples 1 to 5, the flow path width A of the valve part was changed to 3 mm to 15 mm to manufacture the cushioning material.
  • FIG. 12 shows a check valve device 1A according to another embodiment.
  • This check valve device 1A is formed by forming a bent flow path 6A that is bent in a triangular shape at the upper part of each bag part 4 and forming a valve part 10A in the bent flow path 6A.
  • the bent flow path of the check valve device 1A is bent so that the first film and the second film are heat-sealed linearly by triangular frame-shaped heat-sealing wires 11A, 12A, and 13A and bent at an acute angle.
  • the flow path 6A is formed, and the bent flow path 6A is configured as a valve portion 10A.
  • the valve portion 10A of the bent flow path 6A has a bent shape bent in a substantially triangular shape as shown in FIG. 12, and the flow path width A and the shape that can function as a check valve as described above. have.
  • the flow path width A of the valve portion 10A is formed to be shorter than 1/4 of the width W of the bag portion 4 and longer than 1/25 of the width W in the same manner as described above, and when the bag portion 4 is expanded.
  • the first inflatable portion and the second inflatable portion are formed to be shorter than 1 ⁇ 4 of the maximum expansion width Wx and longer than 1/25 of the maximum expansion width Wx.
  • the first film and the second film of 10A are in close contact with each other.
  • FIGS. 13 and 14 show an air cell cushioning material having a single air cell according to still another embodiment.
  • the air cell cushioning material of this example as described above, the first film 22 and the second film 23 are overlapped, and the peripheral portion thereof is surrounded by the heat-sealing wire 34 to form a single bag portion 24.
  • a check valve device 21 is provided on the upper portion of the bag portion 24.
  • the gas injection path 25 is formed vertically in the upper part of the bag part 24 (in the longitudinal direction of the bag part 24), and the check valve device 21 is connected to the end part of the gas injection path 25 as shown in FIGS.
  • the valve portion 30 is formed by the heat fusion wires 31 to 33.
  • the valve portion 30 of the check valve device 21 is configured to form a bent flow passage 26 at an end portion of the gas injection passage 25 and to have a check valve inside thereof.
  • 25 is formed from heat-sealing wires 31 and 32 extending in parallel vertically from the peripheral heat-sealing wire 34, and the lower end of one heat-sealing wire 31 is substantially on the side of the other heat-sealing wire 32.
  • a heat-sealing line 33 substantially perpendicular to the longitudinal direction of the gas injection path 25 is formed so as to be bent at a right angle, and a valve outlet is formed between the tip of the other heat-sealing line 32 and the heat-sealing line 33. Configured. Thereby, the valve part 30 is comprised by the bending flow path 26 provided in the edge part of the gas injection path 25.
  • This check valve device 21 is formed by forming a bent flow path 26 between the first film 22 and the second film 23 by three heat-sealing wires 31, 32, 33.
  • the valve portion 30 that seals the bent flow path 26 when filled with gas is formed between the first expansion portion 27 of the first film 22 and the second expansion portion 28 of the second film 23.
  • the first expansion portion 27 of the first film 22 and the second expansion portion 28 of the second film 23 pull the film of the valve portion 30 from both sides via the heat fusion wires 31 and 32.
  • the flow path width A in the valve section 30 of the bent flow path 26 is shorter than 1/4 of the width W of the bag section 4 and longer than 1/25 of the width W as shown in FIG. It is preferable that the bag portion 24 is formed to be shorter than 1/4 of the maximum expansion width Wx (FIG. 14) of the first expansion portion 27 and the second expansion portion 28 when the bag portion 24 is expanded and longer than 1/25 of the maximum expansion width Wx. . Accordingly, when the bag portion 24 is filled with gas, the first film 22 of the valve portion 30 is caused by the tensile force and the pressing force of the first expansion portion 27 of the first film 22 and the second expansion portion 28 of the second film 23. And the second film 23 can be adhered to each other.
  • the channel width A is shorter than 1/7 of the width W of the bag portion 4 and longer than 1/19 of the width W, and the first inflating portion 27 when the bag portion 4 is inflated.
  • the second expansion portion 28 may be formed to be shorter than 1/7 of the maximum expansion width Wx (FIG. 14a) and longer than 1/19 of the maximum expansion width Wx.
  • the air cell cushioning material having such a configuration, for example, when a nozzle of an air pump is inserted into the gas injection path 25 and air is injected, the air passes through the valve portion 30 of the check valve device 21 of the bent flow path 26 and passes through the bag. It flows into the part 24 and the bag part 24 is inflated.
  • valve portion 30 when the first film 22 and the second film 23 of the valve part are pulled and pressed to come into close contact with each other, air tends to be discharged through the valve part 30 due to the gas pressure of the bag part 24. Furthermore, due to the constriction of the valve portion 30 due to the tension and pressing between the first film 22 and the second film 23, the flow velocity of the gas flowing through the valve portion 30 increases, and a negative pressure is generated in the valve portion 30. Is pressed by the atmospheric pressure, the valve portion 30 can be reliably closed by this action when the air filling is completed.
  • the check valve device 21 can be easily connected to the gas injection path 25 provided on the upper portion of the bag portion 24 by the heat-sealing wires 31 to 33. Since it is possible to form a bag body with a check valve that can be sealed only by forming the bag body, in addition to the air cell cushioning material, even a bag body made of a film that is filled with gas and sealed is of the present invention. A check valve device can be easily applied.
  • FIG. 15 shows an air cell cushioning material of still another embodiment, and the same components as those of the embodiment of FIGS. 13 and 14 are given the same reference numerals as those of FIG.
  • the first film and the second film are overlapped, and the peripheral portion thereof is surrounded by the heat-sealing wire 34 to form the bag portion 24, and the upper portion of the bag portion 24.
  • the gas injection path 25 is formed vertically (in the longitudinal direction of the bag part 24) at the upper part of the bag part 24, and the check valve device 29 is connected to the end part of the gas injection path 25 as shown in FIG.
  • a valve portion 35 is formed by the heat fusion wires 31, 32 and 37.
  • the valve portion 35 of the check valve device 29 is formed so as to form a bent flow path 36 that bends on both sides of the end portion of the gas injection path 25, and the inside thereof serves as a check valve.
  • the gas injection path 25 is formed of heat fusion lines 31 and 32 extending vertically and parallel from the peripheral heat fusion line 34, and a U-shaped thermal fusion is performed so as to cover the lower side of the gas injection path 25.
  • a wire 37 is provided to form a bent flow path 36 and a valve outlet is formed above the heat fusion wires 31 and 32.
  • the valve part 35 is comprised by the bending flow path 36 provided in the edge part of the gas injection path 25.
  • the bent flow path 36 is formed between the first film and the second film by the heat-sealing wires 31, 32, and 37 as described above.
  • the valve part 35 which seals the bent flow path 36 at the time of gas filling is formed between the 1st expansion part of the 1st film, and the 2nd expansion part of the 2nd film.
  • the first expansion part of one film and the second expansion part of the second film pull and press the film of the valve part 35 from both sides via the heat-sealing wires 31, 32, 37, and the first film and the second film
  • the films are brought into close contact with each other to form a check valve device 29.
  • the nozzle of the air pump When injecting air into the air cell cushioning material, the nozzle of the air pump is inserted into the gas injection path 25 and air is injected in the same manner as described above, and then the air passes through the valve portion 35 of the bent flow path 36 and passes through the bag. It flows into the part 24 and the bag part 24 is inflated.
  • FIG. 16 shows an air cell cushioning material according to another embodiment, and the same components as those in the above embodiment are denoted by the same reference numerals as those in FIG.
  • the first film and the second film are overlapped, and the peripheral portion thereof is surrounded by the heat-sealing wire 14 to form the bag portion 4, and the upper portion of the bag portion 4.
  • a check valve device 49 is provided in the gas injection path 5.
  • the gas injection path 5 is formed in the upper part of the bag part 4 in the lateral direction, and the check valve device 49 has a heat sealing line 19 for partitioning the gas injection path 5 and the bag part 4 as shown in FIG.
  • a valve portion 40 is formed in part and configured.
  • the valve portion 40 of the check valve device 49 forms an opening in a part of the heat-sealing line 19 that partitions the gas injection path 5 and the bag portion 4, and the opened valve portion 40 is viewed from above.
  • a saddle-shaped (L-shaped) heat-sealing wire 48 is provided in the gas injection path 5 so as to cover it.
  • the base of the L-shaped heat-sealing wire 48 is connected to the heat-sealing wire 19.
  • a bent flow path 46 is formed on the upper side of the valve section 40, and the valve section 40 is configured by an opening provided in a part of the gas injection path 5 and a subsequent bent flow path 46. Become.
  • the bent flow path 46 is formed between the first film and the second film by the heat fusion wires 19 and 48 in the same manner as described above.
  • the valve part 40 which seals the bent flow path 46 at the time of gas filling is formed between the 1st expansion
  • the first inflated part of one film and the second inflated part of the second film are contracted by pulling and pressing the film of the valve part 40 from both sides via the heat-sealing wires 19, 48. Is a check valve device 49.
  • the nozzle of the air pump When injecting air into the air cell cushioning material, the nozzle of the air pump is inserted into the gas injection path 5 from the injection port 9 and the air is injected as described above. And then flows into the bag part 4 to inflate the bag part 4.
  • the check valve apparatus of this invention can also be applied to the valve
  • the air cell cushioning material is formed by heat-sealing the first film and the second film.
  • the film is further overlapped on the outside, and three or more films are heat-welded to form a bag.
  • Parts and valves can also be formed.
  • the shape of a bag part can also be made into a polygon and a circle other than the above rectangles and rectangles.

Abstract

A bag section (4) is formed by linearly thermally bonding a first film (2) and a second film (3), and a bent flow passage (6) having a valve section (10) is formed in the gas filling passage (5) of the bag section (4). Gas is filled into the bag section (4) through the gas filling passage (5) and through the valve section (10) of the bent flow passage (6), and the bag section (4) is inflated when gas pressure is applied to the inside of the bag section (4). When this occurs, the gas pressure on the bag section (4) side inflates the first film (2) and the second film (3), and as a result, a first inflation section (7) and a second inflation section (8) are formed by thermal bonding lines which form the bent flow passage (6). Portions of the first film (2) and of the second film (3), the portions being located at the valve section (10) within the bent flow passage (6), are pulled and pressed by both the first inflated section (7) and the second inflated section (8) such that the first film (2) and the second film (3) are in close contact with each other, and as a result, the valve section (10) of the bent flow passage (6) is closed.

Description

チェックバルブ装置Check valve device
 本発明は、少なくとも片面が熱融着可能なフィルム製の袋部に、気体注入路を通して気体を充填した状態で自動的に気体の排出を停止させて密閉状態とするチェックバルブ装置に関し、特に袋部の第1フィルムと第2フィルム間を所定の形状に熱融着(ヒートシール)して、簡単に弁部を形成することができるチェックバルブ装置に関する。 The present invention relates to a check valve device for automatically stopping gas discharge in a state where gas is filled in a bag portion made of a film that can be heat-sealed at least on one side, and in particular in a sealed state. The present invention relates to a check valve device that can easily form a valve portion by heat-sealing (heat-sealing) the first film and the second film in a predetermined shape into a predetermined shape.
 例えば、空気による緩衝機能を備えた包装材を製造する場合、空気注入式の空気セル緩衝材が知られており、この空気注入式の空気セル緩衝材は、2枚のフィルムをヒートシールし、多数の空気セルを連通して形成した構造とし、端部に単純な空気の注入口を設けて構成され、通常、この端部の注入口から空気を注入した後、注入口をヒートシールする。 For example, when manufacturing a packaging material having a cushioning function by air, an air-injection type air cell cushioning material is known, and this air-injection type air cell cushioning material heat-seals two films, A structure in which a large number of air cells are connected to each other is formed, and a simple air inlet is provided at the end. Usually, air is injected from the inlet at the end, and then the inlet is heat-sealed.
 このため、ユーザーが、空気セル緩衝材を使用する段階で、自ら空気セル緩衝材に空気を注入する場合、ヒートシール機構付きの空気注入機を購入する必要があり、ヒートシール機構付きの空気注入機は構造が比較的大型のため、末端ユーザーには簡便に使用することが難しい。 For this reason, when the user injects air into the air cell cushioning material at the stage of using the air cell cushioning material, it is necessary to purchase an air injecting machine with a heat sealing mechanism. Since the machine is relatively large in structure, it is difficult for the end user to use it easily.
特表2005-509568号公報JP 2005-509568 Gazette
 そこで、従来、空気注入式の空気セル緩衝材に使用する簡単な構造のチェックバルブ(逆止弁)が、上記特許文献1で提案されている。この空気注入式の空気セル緩衝材では、2枚のフィルムを重ね合わせた緩衝材本体の端部に、中フィルムを間に介挿しその内側に蛇行通路を形成してチェックバルブ部を形成し、このチェックバルブ部を通して、各空気セル内に空気を注入する構造とされている。然るに、この空気セル緩衝材は、空気注入用の入口にチェックバルブ部を設けているものの、チェックバルブ部の性能の問題から、空気をセルに注入した後、チェックバルブ部から空気が漏れ易く、比較的短時間で空気が空気セルから抜けてしまう。 Therefore, conventionally, a check valve (check valve) having a simple structure used for an air injection type air cell cushioning material has been proposed in the above-mentioned Patent Document 1. In this air-injection type air cell cushioning material, an intermediate film is inserted in the end of the cushioning material main body where two films are overlapped, and a check valve portion is formed by forming a meandering passage inside thereof. Air is injected into each air cell through the check valve portion. However, although this air cell cushioning material has a check valve portion at the inlet for air injection, due to the problem of the performance of the check valve portion, air is likely to leak from the check valve portion after injecting air into the cell, Air escapes from the air cell in a relatively short time.
 このため、上記空気セル緩衝材では、チェックバルブ部の手前に設けた空気導入通路の端部に、さらに特殊な入口用チェックバルブを取り付け、その入口用チェックバルブとチェックバルブ部を通して、各空気セルに空気を注入するようにしている。 Therefore, in the above air cell cushioning material, a special inlet check valve is attached to the end of the air introduction passage provided in front of the check valve portion, and each air cell is passed through the inlet check valve and the check valve portion. I try to inject air.
 しかし、この入口用チェックバルブは構造が複雑なため、通常のフィルムのヒートシール工程では製造することができない。このため、別の製造工程で製造した入口用チェックバルブを空気セル緩衝材の製造工程(ヒートシール工程)に持ち込み、バルブ挿入位置にそれを熱溶着する必要があり、そのような工程を自動化した製造装置は必然的にその構造が複雑化し大型化していた。 However, this check valve for entrance cannot be manufactured by a normal film heat sealing process because of its complicated structure. For this reason, it is necessary to bring the check valve for the inlet manufactured in a separate manufacturing process into the manufacturing process (heat sealing process) of the air cell cushioning material, and heat-weld it to the valve insertion position. The manufacturing equipment inevitably had a complicated structure and increased size.
 本発明は、上述の課題を解決するものであり、フィルム製の袋部に気体を充填する際、気体保持性能が高く、袋部内の気圧を長期間維持することができ、しかも構造が簡単で安価に製造することができるチェックバルブ装置を提供することを目的とする。 The present invention solves the above-mentioned problems, and when the film bag portion is filled with gas, the gas holding performance is high, the atmospheric pressure in the bag portion can be maintained for a long time, and the structure is simple. An object of the present invention is to provide a check valve device that can be manufactured at low cost.
 また、本発明は、空気セル内の気圧を長期間維持することができ、しかも構造が簡単で安価に製造することができる空気セル緩衝材を提供することを目的とする。 Another object of the present invention is to provide an air cell cushioning material that can maintain the air pressure in the air cell for a long period of time, and that is simple in structure and can be manufactured at low cost.
 本発明者は、フィルム製袋の逆止弁について鋭意研究の結果、第1フィルムと第2フィルムの2枚のフィルムのみを重ね合わせた構造であっても、気体注入路を特定形状に熱融着して逆止弁部とすることにより、別に製造した入口用チェックバルブを使用しなくとも、逆止弁部を通してフィルム製の袋部内に気体を充填した状態で、袋部内の気体圧力を長期間にわたり保持することができることを知見し、下記の発明に至った。 As a result of earnest research on the check valve for the film bag, the present inventor has thermally fused the gas injection path to a specific shape even in a structure in which only the first film and the second film are overlapped. By attaching it to the check valve portion, the gas pressure in the bag portion can be increased while the film bag portion is filled with gas through the check valve portion without using a separately manufactured inlet check valve. The inventors have found that it can be maintained over a period of time, and have reached the following invention.
 本発明に係るチェックバルブ装置は、第1フィルム及び第2フィルムを重ね合わせ、周縁部を熱融着して袋部が形成され、該袋部の端部に設けた気体注入路から該袋部内に気体を注入して充填するために、該気体注入路に設けられるチェックバルブ装置であって、
 該気体注入路から該袋部内に続く気体の流路として折れ曲り流路が、該第1フィルムと第2フィルム間を線状に熱融着した熱融着線により形成され、該折れ曲り流路内に弁部が設けられ、
 該気体注入路及び該折れ曲り流路の該弁部を通して気体を該袋部内に注入し、充填が完了して該袋部内に気体圧力が印加されたとき、袋部側の該第1フィルムと第2フィルムの該気体圧力による膨張によって、該折れ曲り流路を形成する熱融着線を介して該第1フィルムと第2フィルムの一部に第1膨張部と第2膨張部が形成され、該第1膨張部と第2膨張部により該折れ曲り流路内の弁部の該第1フィルムと第2フィルムが引張及び押圧されて相互に密着し、該折れ曲り流路の弁部が密閉されることを特徴とする。
The check valve device according to the present invention includes a first film and a second film that are overlapped, a peripheral portion is heat-sealed to form a bag portion, and the bag portion is formed from a gas injection path provided at an end portion of the bag portion. A check valve device provided in the gas injection path for injecting gas into the gas injection path,
A bent flow path as a gas flow path that continues from the gas injection path into the bag portion is formed by a heat-sealed wire in which the first film and the second film are heat-sealed linearly, and the bent flow There is a valve in the road,
When the gas is injected into the bag part through the valve part of the gas injection path and the bent flow path, and the filling is completed and the gas pressure is applied to the bag part, the first film on the bag part side Due to the expansion of the second film due to the gas pressure, a first expansion portion and a second expansion portion are formed in a part of the first film and the second film via a heat-sealing line that forms the bent flow path. The first film and the second film of the valve section in the bent flow path are pulled and pressed by the first expansion section and the second expansion section so that they are in close contact with each other, and the valve section of the bent flow path is It is hermetically sealed.
 この発明のチェックバルブ装置によれば、気体注入路から折れ曲り流路を通して気体を袋部内に注入し、充填が完了して袋部内に気体圧力が印加されたとき、袋部側の第1フィルムと第2フィルムの膨張によって、第1膨張部と第2膨張部が形成され、この第1膨張部と第2膨張部が熱融着線を介して、折れ曲り流路内の弁部の第1フィルムと第2フィルム間を引張及び押圧し、折れ曲り流路及び弁部のフィルムが収縮して皺が寄り、皺が寄ったフィルム間が密着するため、気体充填後の弁部を密閉することができる。なお、弁部の第1フィルムと第2フィルム間が引張及び押圧されて密着した状態で、弁部には排出側に袋部の気体圧力が印加されるが、第1フィルムと第2フィルム間の引張による弁部の収縮閉鎖圧力は大きく、弁部の密閉は長期間にわたり保持される。 According to the check valve device of the present invention, when the gas is injected into the bag part from the gas injection path through the bent flow path, and the filling is completed and the gas pressure is applied to the bag part, the first film on the bag part side And the expansion of the second film form a first expansion portion and a second expansion portion, and the first expansion portion and the second expansion portion are connected to the first of the valve portion in the bent flow path via the heat-sealing line. The film between the film 1 and the second film is pulled and pressed, and the folded flow path and the valve part film shrink to cause wrinkles, and the wrinkled film comes into close contact with each other, so the valve part after gas filling is sealed. be able to. In addition, in the state which the 1st film and 2nd film of the valve part were pulled and pressed and contact | adhered, the gas pressure of a bag part is applied to a discharge side to a valve part, but between 1st film and 2nd film The contraction and closing pressure of the valve part due to the tension of the valve is large, and the sealing of the valve part is maintained for a long time.
 これにより、袋部を構成する第1フィルム及び第2フィルムのみで、熱融着線によって折れ曲り流路を形成し、そこを弁部とするチェックバルブ装置を形成することができるので、従来のように、特殊な構造の入口用チェックバルブを袋部の注入口に取り付ける必要がない。また、耐熱性の印刷や特殊なバルブ部材を使用する必要がなく、製品使用上の安全性も向上する。さらに、部品点数の少なさから、環境の保全に役立ち、気体を充填するフィルム袋を非常に安価に且つ簡単に製造することができる。 Thereby, only the 1st film and 2nd film which comprise a bag part can form a bent flow path by a heat fusion line, and can form a check valve device which uses that as a valve part. Thus, it is not necessary to attach an inlet check valve having a special structure to the bag inlet. Further, it is not necessary to use heat-resistant printing or special valve members, and the safety in using the product is improved. Further, since the number of parts is small, it is possible to manufacture a film bag that is useful for environmental conservation and is filled with gas at a very low cost.
 ここで、第1フィルムと第2フィルムは別個のフィルムから形成することができるが、連続する1枚フィルムを曲げて第1フィルムと第2フィルムとし、熱融着により袋部を形成することもできる。 Here, the first film and the second film can be formed from separate films, but the continuous film may be bent to form the first film and the second film, and the bag portion may be formed by heat fusion. it can.
 また、上記折れ曲り流路の弁部の幅は、袋部の幅の1/4より短く且つその幅の1/25より長く形成され、且つ弁部の幅は、袋部が膨張した際の上記第1膨張部と第2膨張部の最大膨張幅の1/4より短く且つ最大膨張幅の1/25より長く形成することが好ましい。 Further, the width of the valve portion of the bent flow path is shorter than 1/4 of the width of the bag portion and longer than 1/25 of the width thereof, and the width of the valve portion is the same as when the bag portion is expanded. Preferably, the first and second inflating portions are formed to be shorter than 1/4 of the maximum expansion width and longer than 1/25 of the maximum expansion width.
 また、上記気体注入路は上記折れ曲り流路に対し略直角に形成され、該気体注入路の端部に気体の注入口を形成することができる。 Further, the gas injection path is formed substantially perpendicular to the bent flow path, and a gas injection port can be formed at the end of the gas injection path.
 また、上記気体注入路と上記折れ曲り流路を一体に形成し、折れ曲り流路の端部に気体の注入口を形成することもできる。 Also, the gas injection path and the bent flow path can be formed integrally, and a gas injection port can be formed at the end of the bent flow path.
 また、上記折れ曲り流路は上記袋部の外側であって上記気体注入路内に形成され袋部と気体注入路を仕切る熱融着線の一部に、上記弁部を形成することができる。 Further, the bent flow path can be formed outside the bag portion and in a part of a heat-sealing line that is formed in the gas injection passage and partitions the bag portion and the gas injection passage. .
 さらに、上記折れ曲り流路の弁部は、上記第1フィルムと第2フィルム間を線状に熱融着して複数の空気セルを形成する空気セル緩衝材の空気注入路に設けることができる。また、上記複数の空気セルを設けた空気セル緩衝材においては、各々の空気セルに、上記弁部を有した折れ曲り流路を設けることができる。 Furthermore, the valve portion of the bent flow path can be provided in an air injection path of an air cell cushioning material that forms a plurality of air cells by linearly heat-sealing the first film and the second film. . Further, in the air cell cushioning material provided with the plurality of air cells, each air cell can be provided with a bent flow path having the valve portion.
 このように、複数の空気セルを設けた空気セル緩衝材において、各々の空気セルに、上記折れ曲り流路の弁部を、任意の間隔で特定形状に熱融着して形成すれば、簡単で安全性の高い空気セル緩衝材を安価に製造することができる。 In this way, in the air cell cushioning material provided with a plurality of air cells, it is easy to form the bent flow path valve portion in each air cell by heat-sealing to a specific shape at an arbitrary interval. In addition, a highly safe air cell cushioning material can be manufactured at low cost.
 本発明の空気セル緩衝材は、第1フィルム及び第2フィルムを重ね合わせ、周縁部を熱融着して複数の空気セルとなる袋部が形成され、該袋部の端部に設けた気体注入路からチェックバルブ装置を通して該袋部内に気体を注入して充填する空気セル緩衝材であって、
 該チェックバルブ装置には、折れ曲り流路が、該第1フィルムと第2フィルム間を線状に熱融着した熱融着線により、該気体注入路から該袋部内に続く気体の流路として形成され、該折れ曲り流路内に弁部が設けられ、
 該気体注入路及び該折れ曲り流路の該弁部を通して気体を該袋部内に注入し、充填が完了して該袋部内に気体圧力が印加されたとき、該袋部側の該第1フィルムと第2フィルムの該気体圧力による膨張によって、該折れ曲り流路を形成する熱融着線を介して該第1フィルムと第2フィルムの一部に第1膨張部と第2膨張部が形成され、該第1膨張部と第2膨張部により該折れ曲り流路内の該弁部の該第1フィルムと第2フィルムが引張及び押圧されて相互に密着し、該折れ曲り流路の該弁部が密閉されることを特徴とする。
The air cell cushioning material of the present invention includes a first film and a second film, and a peripheral portion is heat-sealed to form a bag portion that becomes a plurality of air cells, and a gas provided at an end of the bag portion. An air cell cushioning material for injecting and filling gas into the bag portion from the injection path through the check valve device,
In the check valve device, the bent flow path is a gas flow path that continues from the gas injection path into the bag portion by a heat-sealing line in which the first film and the second film are heat-sealed linearly. A valve portion is provided in the bent flow path,
When the gas is injected into the bag part through the valve part of the gas injection path and the bent flow path, and the filling is completed and the gas pressure is applied to the bag part, the first film on the bag part side As a result of the expansion of the second film by the gas pressure, a first expansion portion and a second expansion portion are formed in a part of the first film and the second film via a heat-sealing line that forms the bent flow path. The first film and the second film of the valve section in the bent flow path are pulled and pressed by the first expansion section and the second expansion section to be in close contact with each other, and the bent flow path The valve portion is hermetically sealed.
 本発明の空気セル緩衝材によれば、空気セルを構成する第1フィルム及び第2フィルムのみで、熱融着線によって折れ曲り流路を形成し、折れ曲り流路内の弁部に上記チェックバルブ装置を設けるので、従来のように、特殊な構造の入口用チェックバルブを空気セルの注入口に取り付ける必要がない。また、耐熱性の印刷や特殊なバルブ部材を使用する必要がなく、製品使用上の安全性も向上し、部品点数の少なさから、非常に安価に且つ簡単に製造することができる。 According to the air cell cushioning material of the present invention, only the first film and the second film constituting the air cell are used to form a bent flow path by heat-sealing lines, and the above check is made on the valve portion in the bent flow path. Since the valve device is provided, it is not necessary to attach an inlet check valve having a special structure to the inlet of the air cell as in the prior art. Further, it is not necessary to use heat-resistant printing or special valve members, the safety in using the product is improved, and since the number of parts is small, it can be manufactured very inexpensively and easily.
 本発明のチェックバルブ装置及び空気セル緩衝材によれば、第1フィルムと第2フィルムを所定の形状に熱融着するのみで弁部を形成することができるため、別工程で製造されたチェックバルブを袋部(空気セル)の口に取り付ける必要がなく、構造が簡単で安価に製造することができ、また、気体保持性能が高く、フィルム製袋(空気セル)内の気圧を長期間維持することができる。また、耐熱性の印刷や特殊なバルブ部材を使用する必要がなく、製品使用上の安全性も向上し、部品点数の少なさから、環境の保全に役立てることができる。 According to the check valve device and the air cell cushioning material of the present invention, since the valve portion can be formed only by heat-sealing the first film and the second film into a predetermined shape, the check manufactured in a separate process There is no need to attach a valve to the mouth of the bag (air cell), the structure is simple and it can be manufactured at low cost, and the gas holding performance is high, maintaining the atmospheric pressure in the film bag (air cell) for a long time. can do. In addition, there is no need to use heat-resistant printing or special valve members, the safety in using the product is improved, and since the number of parts is small, it can be used for environmental conservation.
本発明のチェックバルブ装置を適用した空気セル緩衝材の一例を示す平面図である。It is a top view which shows an example of the air cell shock absorbing material to which the check valve apparatus of this invention is applied. フィルムの厚さを強調した模式図的な図1のII-II断面図である。FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIG. 1 in which the thickness of the film is emphasized. 空気セル内に空気を注入し充填した状態の空気セル緩衝材の側面図である。It is a side view of the air cell shock absorbing material of the state which injected and filled air in the air cell. 空気セル内に空気を注入し充填した状態の図2に対応した模式図的な断面図である。FIG. 3 is a schematic cross-sectional view corresponding to FIG. 2 in a state where air is injected and filled in an air cell. 第1フィルム、第2フィルム、及び熱融着線を示す分解斜視図である。It is a disassembled perspective view which shows a 1st film, a 2nd film, and a heat sealing | fusion line. 空気セル内に空気を充填した状態のチェックバルブ装置を示す平面説明図である。It is plane explanatory drawing which shows the check valve apparatus of the state with which the air cell was filled with air. 空気セル内に空気を充填した状態のチェックバルブ装置を示す斜視説明図である。It is a perspective view showing a check valve device in a state where air is filled in an air cell. 他の実施形態の空気セル緩衝材を示す平面図である。It is a top view which shows the air cell shock absorbing material of other embodiment. 他の実施形態の空気セル緩衝材を示す平面図である。It is a top view which shows the air cell shock absorbing material of other embodiment. 他の実施形態の空気セル緩衝材を示す平面図である。It is a top view which shows the air cell shock absorbing material of other embodiment. 本発明の実施例と比較例の性能を示す性能比較表である。It is a performance comparison table | surface which shows the performance of the Example and comparative example of this invention. 他の実施形態の空気セル緩衝材を示す平面図である。It is a top view which shows the air cell shock absorbing material of other embodiment. 他の実施形態の単一の空気セルを有する空気セル緩衝材を示す平面図である。It is a top view which shows the air cell shock absorbing material which has the single air cell of other embodiment. 他の実施形態の空気セル緩衝材の側面図(a)、及びその中央縦断面図(b)である。It is the side view (a) of the air cell shock absorbing material of other embodiment, and its center longitudinal cross-sectional view (b). 弁部を任意の位置に配置した他の実施形態を示し、単一の空気セルを有する空気セル緩衝材を示す平面図である。It is a top view which shows other embodiment which has arrange | positioned the valve part in arbitrary positions, and shows the air cell shock absorbing material which has a single air cell. 他の実施形態の空気セル緩衝材を示し、独立した弁部を通して空気を注入する、複数の空気セルを有した空気セル緩衝材の平面図である。It is a top view of the air cell shock absorbing material which has the several air cell which shows the air cell shock absorbing material of other embodiment, and inject | pours air through the independent valve part.
 以下、本発明の一実施形態を図面に基づいて説明する。図1~図7は本発明のチェックバルブ装置1を適用した空気セル緩衝材20を示しており、この空気セル緩衝材20は、図5に示すように、両面または片面が熱融着可能な第1フィルム2、第2フィルム3から構成され、第1フィルム2と第2フィルム3の周縁部は熱融着線14により熱融着され、さらに、内部に格子状の熱融着境界線15,熱融着境界線18が縦横にヒートシールされ、これにより、多数の袋部(空気セル)4が縦横に形成される。各列の袋部4の上部にはチェックバルブ装置1が形成される。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 7 show an air cell cushioning material 20 to which the check valve device 1 of the present invention is applied. As shown in FIG. 5, this air cell cushioning material 20 can be thermally fused on both sides or one side. It is composed of a first film 2 and a second film 3, and the peripheral portions of the first film 2 and the second film 3 are heat-sealed by a heat-sealing wire 14, and further, a lattice-like heat-sealing boundary line 15 inside. , The heat-sealing boundary line 18 is heat-sealed vertically and horizontally, whereby a large number of bag portions (air cells) 4 are formed vertically and horizontally. A check valve device 1 is formed on the upper portion of the bag portion 4 of each row.
 第1フィルム2、第2フィルム3には、単層のプラスチックフィルムを用いることができるが、ガスバリアー性やヒートシール性の観点から、2層以上の機能性フィルムを用いることが望ましい。 As the first film 2 and the second film 3, a single-layer plastic film can be used, but it is desirable to use a functional film having two or more layers from the viewpoint of gas barrier properties and heat sealability.
 例えば、2層のプラスチックフィルムを、第1フィルム2、第2フィルム3に使用する場合、外側層にはガスバリアー性のあるナイロン等を使用し、内側層にはLLDPEを使用することができる。また、3層のプラスチックフィルムを使用する場合、外側層にはLLDPEを使用し、内側層にはナイロン等を使用することで、第1フィルム2、第2フィルム3を熱融着し、熱融着された第1フィルム2と第2フィルム3をさらに折り込んだ状態で熱融着を加えることも可能である。 For example, when a two-layer plastic film is used for the first film 2 and the second film 3, a gas barrier nylon or the like can be used for the outer layer, and LLDPE can be used for the inner layer. In addition, when using a three-layer plastic film, the first film 2 and the second film 3 are heat-sealed by using LLDPE for the outer layer and nylon or the like for the inner layer. It is also possible to apply heat fusion in a state in which the first film 2 and the second film 3 that are attached are further folded.
 尚、この場合の層とはバインダー等を層として含まない場合である。また、粘着性のあるフィルム等を使用した場合は、チェックバルブ装置1の第1フィルム2、第2フィルム3の引張および押圧による相互密着の効果を、その粘着性と共に、より高められることが、実施研究により判明している。また、第1フィルム2、第2フィルム3には、約20μm~約300μmの厚さのプラスチックフィルムを用いることが好ましい。 In addition, the layer in this case is a case where a binder etc. are not included as a layer. In addition, when an adhesive film or the like is used, the effect of mutual adhesion by tension and pressing of the first film 2 and the second film 3 of the check valve device 1 can be further enhanced together with the adhesiveness. It has been found by conducting research. The first film 2 and the second film 3 are preferably plastic films having a thickness of about 20 μm to about 300 μm.
 袋部4を形成する格子状の熱融着境界線15,熱融着境界線18は、長尺の熱融着境界線15と短尺の熱融着境界線18から構成され、図1のように、空気セル緩衝材20の上端部に気体注入路5が、平行に設けた熱融着線14と熱融着境界線19によって形成され、気体注入路5の端部には注入口9が開口している。なお、空気セル緩衝材20の袋部4には、通常、空気が注入されるが、勿論、窒素などの気体を注入することもでき、空気セル緩衝材20の空気注入口は気体注入路5として形成される。 The lattice-like heat fusion boundary line 15 and the heat fusion boundary line 18 forming the bag portion 4 are composed of a long heat fusion boundary line 15 and a short heat fusion boundary line 18 as shown in FIG. In addition, a gas injection path 5 is formed at the upper end of the air cell cushioning material 20 by a heat fusion line 14 and a heat fusion boundary line 19 provided in parallel, and an inlet 9 is formed at the end of the gas injection path 5. It is open. Note that air is normally injected into the bag portion 4 of the air cell buffer material 20, but of course, a gas such as nitrogen can also be injected, and the air inlet of the air cell buffer material 20 serves as the gas injection path 5. Formed as.
 空気セル緩衝材20の袋部4に空気を注入し充填する際、端部の注入口9から気体注入路5を通して注入するが、空気の充填後に、自動的に気体注入路5と袋部4間を閉鎖するために、図1に示すように、気体注入路5下側の複数列の袋部4と気体注入路5との間に、各々、チェックバルブ装置1が、第1フィルム2と第2フィルム3間を線状に熱融着して、所定形状の弁部10を設けることにより形成される。 When air is injected into the bag part 4 of the air cell cushioning material 20 and filled, it is injected through the gas injection path 5 from the inlet 9 at the end, but after filling the air, the gas injection path 5 and the bag part 4 are automatically filled. In order to close the gap between the first film 2 and the check valve device 1 between the plurality of rows of bag portions 4 below the gas injection path 5 and the gas injection path 5, as shown in FIG. It is formed by linearly heat-sealing between the second films 3 and providing a valve portion 10 having a predetermined shape.
 空気セル緩衝材20の多数の袋部(空気セル)4は、気体注入路5下側に複数列で連設される、複数段の袋部4として形成され、各々、熱融着境界線18を気体注入路5と平行に形成するとともに、熱融着境界線15を縦方向に形成して構成される。水平方向に設けた各段の熱融着境界線18の両端には、セル用流路17が設けられ、最上部(気体注入路5の下側)の熱融着境界線19に、各列袋部4への充填用にチェックバルブ装置1が設けられる。気体注入路5の端部の注入口9から注入した空気を、各チェックバルブ装置1に通し、袋部4から下段のセル用流路17を通して、全ての袋部4に空気を充填するようになっている。 A large number of bag portions (air cells) 4 of the air cell cushioning material 20 are formed as a plurality of stages of bag portions 4 connected in a plurality of rows below the gas injection path 5, each of which is a heat-sealing boundary line 18. Is formed in parallel with the gas injection path 5 and the thermal fusion boundary 15 is formed in the vertical direction. Cell flow paths 17 are provided at both ends of the heat fusion boundary line 18 of each stage provided in the horizontal direction, and each column is connected to the heat fusion boundary line 19 at the top (below the gas injection path 5). A check valve device 1 is provided for filling the bag portion 4. The air injected from the inlet 9 at the end of the gas injection path 5 is passed through each check valve device 1, and all the bag parts 4 are filled with air from the bag part 4 through the lower cell flow path 17. It has become.
 各列の袋部4の注入口位置に配されるチェックバルブ装置1は、気体注入路5からの分岐路として袋部4内に続く部分で、第1フィルム2と第2フィルム3間を、熱融着線11,12,13により線状に熱融着して折れ曲り流路6とし、折れ曲り流路6内を弁部10とするように構成される。この折れ曲り流路6の弁部10は、図1に示すように、略直角に曲折した折れ曲り形状を有し、逆止弁として機能可能な幅と形状を有したものとなっている。 The check valve device 1 arranged at the inlet position of the bag portion 4 in each row is a portion continuing into the bag portion 4 as a branch passage from the gas injection passage 5, and between the first film 2 and the second film 3, The heat-sealing wires 11, 12, and 13 are heat-sealed linearly to form a bent flow path 6, and the bent flow path 6 is configured as a valve portion 10. As shown in FIG. 1, the valve portion 10 of the bent flow path 6 has a bent shape bent substantially at a right angle, and has a width and a shape capable of functioning as a check valve.
 すなわち、チェックバルブ装置1は、図1に示すように、折れ曲り流路6内に弁部10を設けて構成され、弁部10を有する折れ曲り流路6は、気体注入路5の下側の熱融着境界線19の一部に、弁入口6aを開口して形成し、さらに、その弁入口6aから熱融着線11,12を下方に縦に延設し、一方の熱融着線11の下端を他方の熱融着線12側に略直角に曲げて、気体注入路5と略平行な熱融着線13を形成し、他方の熱融着線12の先端と熱融着線13との間に、弁出口6bを形成して、構成される。 That is, as shown in FIG. 1, the check valve device 1 is configured by providing a valve portion 10 in a bent flow path 6, and the bent flow path 6 having the valve portion 10 is located below the gas injection path 5. The valve inlet 6a is formed in a part of the heat fusion boundary line 19 of the heat fusion line 19, and the heat fusion wires 11 and 12 are vertically extended downward from the valve inlet 6a. The lower end of the wire 11 is bent at a substantially right angle toward the other heat-sealing wire 12 to form a heat-sealing wire 13 substantially parallel to the gas injection path 5, and the tip of the other heat-sealing wire 12 is heat-sealed. A valve outlet 6b is formed between the line 13 and the line 13.
 このように、チェックバルブ装置1は第1フィルム2と第2フィルム3間を3本の熱融着線11,12,13により折れ曲り流路6を形成して構成されるが、その弁部10は折れ曲り流路6内に、単純に第1フィルム2と第2フィルム3間で形成されることとなる。つまり、気体の充填時、図3~図7に示すように、袋部4は膨張するが、そのとき、第1フィルム2の第1膨張部7と第2フィルム3の第2膨張部8がチェックバルブ装置1の近傍に形成され、その第1フィルム2の第1膨張部7と第2フィルム3の第2膨張部8が、膨張時、両側から熱融着線11,12を介して弁部10のフィルムを引張及び押圧し、その引張力及び押圧力によって第1フィルム2と第2フィルム3間を密着させ、折れ曲り流路6を密閉する弁部10としての機能を行うようになっている。 As described above, the check valve device 1 is configured by forming the bent flow path 6 between the first film 2 and the second film 3 by the three heat-sealing wires 11, 12, and 13. 10 is simply formed between the first film 2 and the second film 3 in the bent flow path 6. That is, when the gas is filled, as shown in FIGS. 3 to 7, the bag portion 4 expands. At this time, the first expansion portion 7 of the first film 2 and the second expansion portion 8 of the second film 3 The first expansion part 7 of the first film 2 and the second expansion part 8 of the second film 3 are formed in the vicinity of the check valve device 1 and are valved from both sides via heat-sealing wires 11 and 12 during expansion. The film of the portion 10 is pulled and pressed, the first film 2 and the second film 3 are brought into close contact with each other by the tensile force and pressing force, and the function as the valve portion 10 that seals the bent flow path 6 is performed. ing.
 つまり、チェックバルブ装置1は、気体注入路5及び折れ曲り流路6を通して気体を袋部4内に注入し充填を完了して、袋部4内に気体圧力が印加されたとき、袋部4が膨張し、袋部4側の第1フィルム2と第2フィルム3の気体圧力による膨張により、折れ曲り流路6の両側の熱融着線11,12を介して第1膨張部7と第2膨張部8が、折れ曲り流路6内の弁部10の第1フィルム2と第2フィルム3を引張及び押圧して相互に密着させ、これにより、折れ曲り流路6の弁部10を閉鎖するように構成される。 That is, when the check valve device 1 completes filling by injecting gas into the bag part 4 through the gas injection path 5 and the bent flow path 6, and the gas pressure is applied to the bag part 4, the bag part 4 And the first film 2 and the second film 3 on the bag part 4 side are expanded by the gas pressure, and the first expansion part 7 and the first film 7 are connected to the first expansion part 7 via the heat-sealing wires 11 and 12 on both sides of the bent flow path 6. 2 The expansion part 8 pulls and presses the first film 2 and the second film 3 of the valve part 10 in the bent flow path 6 so that the valve part 10 of the bent flow path 6 is brought into close contact with each other. Configured to close.
 ここで、折れ曲り流路6を逆止弁として機能させるためには、折れ曲り流路6の弁部10における流路幅A(折れ曲り流路の最も狭い部分の幅)が重要となる。流路幅Aが袋部4の幅に対し大きすぎると、内部の気体が逆流して漏れやすく、流路幅Aが小さいと、空気ポンプなどを使用して気体を袋部4内に注入する際、圧力損失が増大し、効率よく気体を注入することが難しい。 Here, in order for the bent channel 6 to function as a check valve, the channel width A (width of the narrowest part of the bent channel) in the valve portion 10 of the bent channel 6 is important. If the flow path width A is too large relative to the width of the bag part 4, the internal gas tends to flow backward and leak easily, and if the flow path width A is small, the air is injected into the bag part 4 using an air pump or the like. At this time, pressure loss increases, and it is difficult to inject gas efficiently.
 このために、流路幅Aは、図1のように、袋部4の幅Wの1/4より短く且つ幅Wの1/25より長く形成し、且つ袋部4が膨張した際の第1膨張部7と第2膨張部8の最大膨張幅Wx(図3)の1/4より短く且つ最大膨張幅Wxの1/25より長く形成する。これにより、袋部4への気体の充填時、第1フィルム2の第1膨張部7と第2フィルム3の第2膨張部8の引張力及び押圧力により、弁部10の第1フィルム2と第2フィルム3を密着させることができる。 Therefore, as shown in FIG. 1, the flow path width A is formed to be shorter than 1/4 of the width W of the bag portion 4 and longer than 1/25 of the width W, and when the bag portion 4 is expanded. The first expansion portion 7 and the second expansion portion 8 are formed to be shorter than 1/4 of the maximum expansion width Wx (FIG. 3) and longer than 1/25 of the maximum expansion width Wx. Accordingly, when the bag portion 4 is filled with gas, the first film 2 of the valve portion 10 is caused by the tensile force and the pressing force of the first expansion portion 7 of the first film 2 and the second expansion portion 8 of the second film 3. And the second film 3 can be brought into close contact with each other.
 つまり、このチェックバルブ装置1においては、弁部10の流路幅Aを、袋部4の幅Wの1/4より広くした場合、弁部10の密着性が低下しやすく、また、弁部10の流路幅Aを、第1膨張部7と第2膨張部8の最大膨張幅Wxの1/25より短く形成した場合には、空気を注入する際の弁部10での圧力損失が非常に増大し、空気の注入に支障をきたし易いのである。 That is, in this check valve device 1, when the flow path width A of the valve portion 10 is wider than ¼ of the width W of the bag portion 4, the adhesion of the valve portion 10 is likely to be reduced. When the flow path width A of 10 is shorter than 1/25 of the maximum expansion width Wx of the first expansion portion 7 and the second expansion portion 8, the pressure loss at the valve portion 10 when air is injected is reduced. It is very increased and is likely to hinder air injection.
 なお、より望ましくは、流路幅Aは、袋部4の幅Wの1/7より短く且つ幅Wの1/19より長く形成し、且つ袋部4が膨張した際の第1膨張部7と第2膨張部8の最大膨張幅Wx(図3)の1/7より短く且つ最大膨張幅Wxの1/19より長く形成するとよい。具体的には、例えば袋部4の幅Wが約40mm、第1膨張部7と第2膨張部8の最大膨張幅Wxが約35mmの大きさの袋部の場合、流路幅Aは、約20mm未満で約2.0mm以上とすることが好ましい。流路幅Aを20mm以上とすると、弁部10の密着性が低下しやすく、流路幅Aを2.0mm未満とすると、空気の注入が難しくなる。具体的には、通常の大きさの袋部を有する空気セル緩衝材の場合、弁部10の流路幅Aは、約0.8mm~約20mmの範囲とすることができる。 More desirably, the flow path width A is shorter than 1/7 of the width W of the bag portion 4 and longer than 1/19 of the width W, and the first inflating portion 7 when the bag portion 4 is inflated. It is preferable to form the second expansion portion 8 shorter than 1/7 of the maximum expansion width Wx (FIG. 3) and longer than 1/19 of the maximum expansion width Wx. Specifically, for example, when the bag portion 4 has a width W of about 40 mm and the maximum expansion width Wx of the first inflatable portion 7 and the second inflatable portion 8 is about 35 mm, the flow path width A is: It is preferable to be less than about 20 mm and about 2.0 mm or more. If the flow path width A is 20 mm or more, the adhesion of the valve portion 10 is likely to be lowered, and if the flow path width A is less than 2.0 mm, it is difficult to inject air. Specifically, in the case of an air cell cushioning material having a normal size bag portion, the flow path width A of the valve portion 10 can be in the range of about 0.8 mm to about 20 mm.
 上記構成のチェックバルブ装置1は、第1フィルム2と第2フィルム3からなる空気セル緩衝材20の上部の気体注入路5とその下部の袋部4(空気セル)との間に配され、気体注入路5から注入された気体(空気)を、各チェックバルブ装置1を通して各袋部4に注入し充填するようになっている。 The check valve device 1 having the above-described configuration is disposed between the upper gas injection path 5 of the air cell cushioning material 20 made of the first film 2 and the second film 3 and the lower bag portion 4 (air cell). The gas (air) injected from the gas injection path 5 is injected into each bag portion 4 through each check valve device 1 and filled.
 上記構成の空気セル緩衝材は、第1フィルム2と第2フィルム3を、所定の大きさの長方形形状に裁断して重ね合わせ、所定の位置に線状の熱融着線を形成する、つまり、第1フィルム2と第2フィルム3の周縁部を熱融着線14によるヒートシールし、上部水平方向に、熱融着境界線19と熱融着線14によって気体注入路5を形成し、その端部を開口して注入口9を形成する。さらに、熱融着境界線19とその下側に形成される袋部4との間には、各々、チェックバルブ装置1が熱融着線11,12,13によって形成される。これらの製造工程は、第1フィルム2と第2フィルム3間をヒートシールするのみの極めて簡単なヒートシール工程のみで構成することができ、従来のように、特殊な材料と加工により別個に製造したチェックバルブを、空気注入口に接着剤或いはヒートシールなどで取着する必要がない。 The air cell cushioning material having the above configuration is formed by cutting the first film 2 and the second film 3 into a rectangular shape having a predetermined size and superimposing them to form a linear heat-sealing line at a predetermined position. The peripheral portions of the first film 2 and the second film 3 are heat-sealed by the heat-sealing wire 14, and the gas injection path 5 is formed by the heat-sealing boundary line 19 and the heat-sealing wire 14 in the upper horizontal direction. The end portion is opened to form the injection port 9. Further, the check valve device 1 is formed by the heat- sealing lines 11, 12, 13 between the heat-sealing boundary line 19 and the bag part 4 formed below the heat-sealing boundary line 19. These manufacturing processes can be configured with only a very simple heat sealing process that only heat seals between the first film 2 and the second film 3, and separately manufactured by special materials and processing as in the past. There is no need to attach the check valve to the air inlet with an adhesive or heat seal.
 このような構成の空気セル緩衝材20に空気(気体)を充填する場合、例えば小型の空気注入器(空気ポンプ)を用いて、空気セル緩衝材20の各袋部4内に、空気を注入して使用するが、その場合、図示しない空気ポンプのノズルを気体注入路5の端部の注入口9に差し込み、空気を気体注入路5から各チェックバルブ装置1を通して、各袋部4内に充填する。 When air (gas) is filled in the air cell cushioning material 20 having such a configuration, air is injected into each bag portion 4 of the air cell cushioning material 20 using, for example, a small air injector (air pump). In this case, a nozzle of an air pump (not shown) is inserted into the inlet 9 at the end of the gas injection path 5, and air is passed through the check valve device 1 from the gas injection path 5 into each bag part 4. Fill.
 気体注入路5を通して空気を注入すると、空気は、各チェックバルブ装置1の折れ曲り流路6の弁部10の弁入口6aから弁出口6bを通り、先ず上段の袋部4に入り、さらに、熱融着境界線18の両端のセル用流路17を通過して、下段の袋部4に流入し、順に下段の全ての袋部4に空気を注入していく。 When air is injected through the gas injection path 5, the air passes from the valve inlet 6a of the valve section 10 of the bent flow path 6 of each check valve device 1 through the valve outlet 6b, first enters the upper bag section 4, After passing through the cell flow path 17 at both ends of the thermal fusion boundary line 18, it flows into the lower bag part 4 and injects air into all the lower bag parts 4 in order.
 そして、全ての袋部4に適正圧力の空気が注入され、充填が完了すると、図3~図7に示すように、袋部4が膨張し、それに伴い、袋部4の第1フィルムと第2フィルムの膨張によって、各チェックバルブ装置1の折れ曲り流路6の両側つまり弁部10の両側に、第1フィルム2と第2フィルム3による第1膨張部7と第2膨張部8が形成される。この第1膨張部7と第2膨張部8の引張力及び押圧力が、弁部10の熱融着線11,12を介して、折れ曲り流路6内の弁部10の第1フィルム2と第2フィルム3間を密着させるように作用する。つまり、第1膨張部7と第2膨張部8が熱融着線11,12を介して、折れ曲り流路6内の弁部10の第1フィルム2と第2フィルム3間を引張及び押圧し、折れ曲り流路6及び弁部10のフィルムが収縮して皺が寄り、皺が寄ったフィルム間が密着するため、気体充填後の弁部10が密閉される。 Then, when air of appropriate pressure is injected into all the bag parts 4 and filling is completed, the bag parts 4 expand as shown in FIGS. 3 to 7, and accordingly, the first film and the first film of the bag part 4 are expanded. Due to the expansion of the two films, the first expansion portion 7 and the second expansion portion 8 are formed by the first film 2 and the second film 3 on both sides of the bent flow path 6 of each check valve device 1, that is, on both sides of the valve portion 10. Is done. The first film 2 of the valve section 10 in the bent flow path 6 is caused by the tensile force and the pressing force of the first expansion section 7 and the second expansion section 8 via the heat-sealing wires 11 and 12 of the valve section 10. And the second film 3 are brought into close contact with each other. That is, the first expansion portion 7 and the second expansion portion 8 are tensioned and pressed between the first film 2 and the second film 3 of the valve portion 10 in the bent flow path 6 via the heat-sealing wires 11 and 12. Then, since the film of the bent flow path 6 and the valve portion 10 is contracted and wrinkled, and the wrinkled films are in close contact with each other, the valve portion 10 after gas filling is sealed.
 これにより、各チェックバルブ装置1の弁部10が密閉され、空気セル緩衝材20への空気の充填が完了し、各袋部4が膨張状態で保持される。このときの密閉状態は、図7に示すように、第1膨張部7と第2膨張部8の引張力によって弁部10のフィルムに捩れや皴が発生しているので、外観からも弁部10の閉鎖が容易に確認できる。なお、弁部10の第1フィルム2と第2フィルム3間が引張及び押圧されて密着した状態で、弁部10には排出側に袋部の気体圧力が印加されるが、第1フィルム2と第2フィルム3間の引張及び押圧による弁部の収縮閉鎖圧力は大きく、弁部の密閉は長期間にわたり保持される。 Thereby, the valve portion 10 of each check valve device 1 is sealed, filling of the air cell cushioning material 20 is completed, and each bag portion 4 is held in an inflated state. As shown in FIG. 7, the sealed state at this time is twisted or wrinkled in the film of the valve portion 10 due to the tensile force of the first and second inflating portions 7 and 8. 10 closures can be easily confirmed. In addition, in the state which the 1st film 2 and 2nd film 3 of the valve part 10 were pulled and pressed and contact | adhered, the gas pressure of a bag part is applied to the valve part 10 at the discharge side, but the 1st film 2 The contraction and closing pressure of the valve part due to the tension and the press between the second film 3 and the second film 3 are large, and the sealing of the valve part is maintained for a long time.
 このように、空気セル緩衝材20は、表裏の第1フィルム2と第2フィルム3間に、熱融着線を形成するのみの、非常に簡単な工程によって、袋部4及びチェックバルブ装置1を形成することができ、チェックバルブ装置1は、袋部4を構成する第1フィルム2及び第2フィルム3のみで、熱融着線により折れ曲り流路6を形成して、その流路を弁部10とするように構成することができるので、従来のように、特殊な構造の入口用チェックバルブを袋部の注入口に取り付ける必要がなく、非常に安価に且つ簡単に製造することができる。 As described above, the air cell cushioning material 20 is formed by the bag part 4 and the check valve device 1 by a very simple process in which a heat-sealing line is formed between the first film 2 and the second film 3 on the front and back sides. The check valve device 1 is formed only by the first film 2 and the second film 3 constituting the bag portion 4 and forms a bent flow path 6 by heat-sealing lines. Since it can be configured to be the valve portion 10, it is not necessary to attach a check valve for an inlet having a special structure to the inlet of the bag portion as in the prior art, and it can be manufactured very cheaply and easily. it can.
 なお、上記実施形態の空気セル緩衝材20では、気体注入路5に隣接した袋部4にのみ、折れ曲り流路6を有する弁部10を設けたが、図8に示すように、複数の袋部4が多段状に配置されている空気セル緩衝材の場合、全ての複数の袋部4に折れ曲り流路6を有する弁部10を設けることができる。この場合、多段状の複数の袋部4では、上下に隣接する袋部4との間の熱融着境界線19に、弁部10を形成することとなる。また、複数の袋部4に設ける弁部10は、図9に示すように、左右に隣接する袋部4との間の熱融着境界線15に形成することもできる。さらに、図10に示すように、空気セル緩衝材20の上部横方向の気体注入路5には、そこに多段状に形成される複数の袋部4に対し、多段方向に延びる分岐気体注入路5aを縦に接続形成し、気体注入路5から分岐気体注入路5aを通して、下段の袋部4に、弁部10を通して空気を注入するように構成することもできる。なお、図10の弁部10のように、熱融着境界線19に対し熱融着線11を直角ではなく、傾斜して設けることもできる。これにより、折り曲げ流路6は弁入口6aがより広く形成され、空気の注入が良好となる。 In the air cell cushioning material 20 of the above embodiment, the valve portion 10 having the bent flow path 6 is provided only in the bag portion 4 adjacent to the gas injection path 5, but as shown in FIG. In the case of the air cell cushioning material in which the bag portions 4 are arranged in multiple stages, the valve portions 10 having the bent flow paths 6 can be provided in all the plurality of bag portions 4. In this case, in the plurality of multi-stage bag parts 4, the valve part 10 is formed at the thermal fusion boundary line 19 between the bag parts 4 adjacent in the vertical direction. Moreover, the valve part 10 provided in the some bag part 4 can also be formed in the heat sealing | fusion boundary line 15 between the bag parts 4 adjacent on either side, as shown in FIG. Further, as shown in FIG. 10, a branch gas injection path extending in the multi-stage direction is provided in the gas injection path 5 in the upper lateral direction of the air cell cushioning material 20 with respect to the plurality of bag portions 4 formed in a multi-stage shape there. 5a may be vertically connected and air may be injected from the gas injection path 5 through the branch gas injection path 5a to the lower bag section 4 through the valve section 10. In addition, like the valve part 10 of FIG. 10, the heat-sealing line 11 can also be provided with an inclination rather than a right angle with respect to the heat-sealing boundary line 19. As a result, the bent flow path 6 has a wider valve inlet 6a, and air can be injected better.
 以下、本発明の効果を確認するために、比較例と共に行なった実施例について図11を参照して説明する。各実施例、比較例の空気セル緩衝材は、150×390mmの第1フィルム、150×390mmの第2フィルムを重ね合わせて所定部分をヒートシールし、150×390mmの大きさに形成した。また、緩衝材には、最大膨張幅が30×30mmの空気セルを、4列10行で40個形成した。 Hereinafter, in order to confirm the effect of the present invention, an example performed together with a comparative example will be described with reference to FIG. The air cell cushioning material of each example and comparative example was formed in a size of 150 × 390 mm by overlapping a first film of 150 × 390 mm and a second film of 150 × 390 mm and heat-sealing a predetermined portion. In the buffer material, 40 air cells having a maximum expansion width of 30 × 30 mm were formed in 4 columns and 10 rows.
 第1フィルム、第2フィルムには、厚さ75μmのガスバリアー性のある多層共押しフィルムを使用した。比較例1では、弁部の流路幅Aを21mmとし、実施例1~5では、弁部の流路幅Aを3mm~15mmと変えて緩衝材を製作した。 For the first film and the second film, a multi-layer co-pressed film having a gas barrier property with a thickness of 75 μm was used. In Comparative Example 1, the flow path width A of the valve part was set to 21 mm, and in Examples 1 to 5, the flow path width A of the valve part was changed to 3 mm to 15 mm to manufacture the cushioning material.
 各比較例1、実施例1~5の空気セル緩衝材には、小型の空気注入器を用いて空気を注入し、その注入時の空気圧を測定すると共に、空気セルが所定の膨張状態に達した状態で、空気注入器のノズルを外し、空気を充填した各比較例1、実施例1~5の空気セル緩衝材の上に約200gの平板を載置し、その状態で平板の高さの変化を測定することにより、空気セルの空気保持状態が90%となるまでの期間を測定した。その結果を図11の性能表に示す。 In each of the air cell cushioning materials of Comparative Example 1 and Examples 1 to 5, air was injected using a small air injector, the air pressure at the time of injection was measured, and the air cell reached a predetermined expanded state. In this state, the nozzle of the air injector is removed, and about 200 g of a flat plate is placed on the air cell cushioning material of each of Comparative Example 1 and Examples 1 to 5 filled with air. By measuring this change, the period until the air retention state of the air cell reached 90% was measured. The results are shown in the performance table of FIG.
 図11の性能表に示すように、比較例1の如く、弁部10の流路幅Aを袋部4の幅W或いは最大膨張幅Wxの一定割合より大きくしたものでは、明らかに空気セルの空気保持期間が短く、実施例1~5のように、弁部10の流路幅Aを適正値にしたものでは、空気セルの空気保持期間が比較例に比べ、著しく長くなったことが分かる。 As shown in the performance table of FIG. 11, as in Comparative Example 1, when the flow path width A of the valve portion 10 is larger than a certain ratio of the width W of the bag portion 4 or the maximum expansion width Wx, the air cell clearly When the air holding period is short and the flow path width A of the valve unit 10 is set to an appropriate value as in Examples 1 to 5, the air holding period of the air cell is significantly longer than that of the comparative example. .
 一方、空気セルに空気を注入する際の空気注入圧力は、チェックバルブ装置1の弁部10の流路幅Aが適正値より小さくなると、注入時の空気流の圧力損失が非常に大きくなって、空気注入圧力が汎用の小型空気ポンプの圧力を超え、また注入時のフィルムの破損も生じやすく、空気の充填が難しくなった。 On the other hand, when the flow path width A of the valve portion 10 of the check valve device 1 is smaller than an appropriate value, the air injection pressure when the air is injected into the air cell becomes very large. The air injection pressure exceeded that of a general-purpose small air pump, and the film was easily damaged during injection, making it difficult to fill the air.
 図12は他の実施形態のチェックバルブ装置1Aを示している。このチェックバルブ装置1Aは、三角形状に折れ曲った折れ曲り流路6Aを各袋部4の上部に形成し、その折れ曲り流路6A内に弁部10Aを形成して構成される。 FIG. 12 shows a check valve device 1A according to another embodiment. This check valve device 1A is formed by forming a bent flow path 6A that is bent in a triangular shape at the upper part of each bag part 4 and forming a valve part 10A in the bent flow path 6A.
 このチェックバルブ装置1Aの折れ曲り流路は、第1フィルムと第2フィルム間を、三角形枠状の熱融着線11A,12A,13Aにより線状に熱融着して、鋭角に曲がる折れ曲り流路6Aとし、折れ曲り流路6A内を弁部10Aとするように構成される。これにより、折れ曲り流路6Aの弁部10Aは、図12のように、略三角形状に曲折した折れ曲り形状を有し、上記と同様、逆止弁として機能可能な流路幅Aと形状を有している。 The bent flow path of the check valve device 1A is bent so that the first film and the second film are heat-sealed linearly by triangular frame-shaped heat-sealing wires 11A, 12A, and 13A and bent at an acute angle. The flow path 6A is formed, and the bent flow path 6A is configured as a valve portion 10A. Thereby, the valve portion 10A of the bent flow path 6A has a bent shape bent in a substantially triangular shape as shown in FIG. 12, and the flow path width A and the shape that can function as a check valve as described above. have.
 つまり、弁部10Aの流路幅Aは、上記と同様に、袋部4の幅Wの1/4より短く且つ幅Wの1/25より長く形成し、且つ袋部4が膨張した際の第1膨張部と第2膨張部の最大膨張幅Wxの1/4より短く且つ最大膨張幅Wxの1/25より長く形成され、これにより、袋部4への気体の充填完了時、弁部10Aの第1フィルムと第2フィルム間が密着する。 That is, the flow path width A of the valve portion 10A is formed to be shorter than 1/4 of the width W of the bag portion 4 and longer than 1/25 of the width W in the same manner as described above, and when the bag portion 4 is expanded. The first inflatable portion and the second inflatable portion are formed to be shorter than ¼ of the maximum expansion width Wx and longer than 1/25 of the maximum expansion width Wx. The first film and the second film of 10A are in close contact with each other.
 このような、図12に示す三角形形状の折れ曲り流路6Aであっても、気体を気体注入路5を通して注入したとき、袋部4が膨張し、第1フィルムの第1膨張部と第2フィルムの第2膨張部がチェックバルブ装置1Aの近傍に形成され、その第1フィルムの第1膨張部と第2フィルムの第2膨張部が、膨張時、両側から熱融着線11A,1/4Aを介して弁部10Aのフィルムを引張及び押圧し、その引張力及び押圧力によって第1フィルムと第2フィルム間を密着させ、折れ曲り流路6Aを密閉する弁部10Aとして機能させることもできる。 Even in the case of the triangular bent flow path 6A shown in FIG. 12, when the gas is injected through the gas injection path 5, the bag portion 4 expands, and the first expansion portion and the second expansion portion of the first film are expanded. A second inflating part of the film is formed in the vicinity of the check valve device 1A, and the first inflating part of the first film and the second inflating part of the second film are expanded from both sides by the heat- sealing lines 11A, 1 / The film of the valve portion 10A is pulled and pressed through 4A, and the first film and the second film are brought into close contact with each other by the tensile force and the pressing force, thereby functioning as the valve portion 10A that seals the bent flow path 6A. it can.
 図13、14はさらに他の実施形態の単一の空気セルを有する空気セル緩衝材を示している。この例の空気セル緩衝材は、上記と同様、第1フィルム22と第2フィルム23を重ね合わせ、その周縁部を熱融着線34により包囲して単一の袋部24を形成し、その袋部24の上部にチェックバルブ装置21を設けて構成される。気体注入路25は袋部24の上部に縦に(袋部24の長手方向に向けて)形成され、チェックバルブ装置21は、図13、14に示すように、その気体注入路25の末端部に、熱融着線31~33によって弁部30が形成されている。 13 and 14 show an air cell cushioning material having a single air cell according to still another embodiment. In the air cell cushioning material of this example, as described above, the first film 22 and the second film 23 are overlapped, and the peripheral portion thereof is surrounded by the heat-sealing wire 34 to form a single bag portion 24. A check valve device 21 is provided on the upper portion of the bag portion 24. The gas injection path 25 is formed vertically in the upper part of the bag part 24 (in the longitudinal direction of the bag part 24), and the check valve device 21 is connected to the end part of the gas injection path 25 as shown in FIGS. In addition, the valve portion 30 is formed by the heat fusion wires 31 to 33.
 チェックバルブ装置21の弁部30は、図13に示すように、気体注入路25の端部に折れ曲り流路26を形成し、その内部を逆止弁とするように構成され、気体注入路25は周縁部の熱融着線34から縦に平行に延設された熱融着線31,32から形成され、一方の熱融着線31の下端を他方の熱融着線32側に略直角に曲げるように、気体注入路25の長手方向と略直角の熱融着線33を形成し、他方の熱融着線32の先端と熱融着線33との間に、弁出口を形成して、構成される。これにより、弁部30は気体注入路25の端部に設けた折れ曲り流路26によって構成されることとなる。 As shown in FIG. 13, the valve portion 30 of the check valve device 21 is configured to form a bent flow passage 26 at an end portion of the gas injection passage 25 and to have a check valve inside thereof. 25 is formed from heat-sealing wires 31 and 32 extending in parallel vertically from the peripheral heat-sealing wire 34, and the lower end of one heat-sealing wire 31 is substantially on the side of the other heat-sealing wire 32. A heat-sealing line 33 substantially perpendicular to the longitudinal direction of the gas injection path 25 is formed so as to be bent at a right angle, and a valve outlet is formed between the tip of the other heat-sealing line 32 and the heat-sealing line 33. Configured. Thereby, the valve part 30 is comprised by the bending flow path 26 provided in the edge part of the gas injection path 25. FIG.
 このチェックバルブ装置21は、第1フィルム22と第2フィルム23間を3本の熱融着線31,32,33によって、折れ曲り流路26を形成することにより形成される。気体の充填時に折れ曲り流路26を密閉する弁部30は、図14に示すように、第1フィルム22の第1膨張部27と第2フィルム23の第2膨張部28との間に形成され、気体の充填時、第1フィルム22の第1膨張部27と第2フィルム23の第2膨張部28が、両側から熱融着線31,32を介して弁部30のフィルムを引張及び押圧し、その第1フィルム22と第2フィルム23間を密着させる構造である。 This check valve device 21 is formed by forming a bent flow path 26 between the first film 22 and the second film 23 by three heat-sealing wires 31, 32, 33. As shown in FIG. 14, the valve portion 30 that seals the bent flow path 26 when filled with gas is formed between the first expansion portion 27 of the first film 22 and the second expansion portion 28 of the second film 23. When the gas is filled, the first expansion portion 27 of the first film 22 and the second expansion portion 28 of the second film 23 pull the film of the valve portion 30 from both sides via the heat fusion wires 31 and 32. This is a structure in which the first film 22 and the second film 23 are pressed and pressed.
 ここで、折れ曲り流路26の弁部30における流路幅Aは、図13のように、袋部4の幅Wの1/4より短く且つ幅Wの1/25より長く形成し、且つ袋部24が膨張した際の第1膨張部27と第2膨張部28の最大膨張幅Wx(図14)の1/4より短く且つ最大膨張幅Wxの1/25より長く形成することが好ましい。これにより、袋部24への気体の充填時、第1フィルム22の第1膨張部27と第2フィルム23の第2膨張部28の引張力及び押圧力により、弁部30の第1フィルム22と第2フィルム23を密着させることができる。なお、より望ましくは、流路幅Aは、袋部4の幅Wの1/7より短く且つ幅Wの1/19より長く形成し、且つ袋部4が膨張した際の第1膨張部27と第2膨張部28の最大膨張幅Wx(図14a)の1/7より短く且つ最大膨張幅Wxの1/19より長く形成するとよい。 Here, the flow path width A in the valve section 30 of the bent flow path 26 is shorter than 1/4 of the width W of the bag section 4 and longer than 1/25 of the width W as shown in FIG. It is preferable that the bag portion 24 is formed to be shorter than 1/4 of the maximum expansion width Wx (FIG. 14) of the first expansion portion 27 and the second expansion portion 28 when the bag portion 24 is expanded and longer than 1/25 of the maximum expansion width Wx. . Accordingly, when the bag portion 24 is filled with gas, the first film 22 of the valve portion 30 is caused by the tensile force and the pressing force of the first expansion portion 27 of the first film 22 and the second expansion portion 28 of the second film 23. And the second film 23 can be adhered to each other. More desirably, the channel width A is shorter than 1/7 of the width W of the bag portion 4 and longer than 1/19 of the width W, and the first inflating portion 27 when the bag portion 4 is inflated. In addition, the second expansion portion 28 may be formed to be shorter than 1/7 of the maximum expansion width Wx (FIG. 14a) and longer than 1/19 of the maximum expansion width Wx.
 このような構成の空気セル緩衝材では、例えば空気ポンプのノズルを気体注入路25に差し込み、空気を注入すると、空気は、折れ曲り流路26のチェックバルブ装置21の弁部30を通り、袋部24に流入し、袋部24を膨張させていく。 In the air cell cushioning material having such a configuration, for example, when a nozzle of an air pump is inserted into the gas injection path 25 and air is injected, the air passes through the valve portion 30 of the check valve device 21 of the bent flow path 26 and passes through the bag. It flows into the part 24 and the bag part 24 is inflated.
 袋部24に適正圧力の空気が注入され、充填が完了すると、上記と同様に、袋部24の膨張に伴い、チェックバルブ装置21の折れ曲り流路26の両側つまり弁部30の両側の第1フィルム22と第2フィルム23が膨張し、その膨張によって図11の如く第1膨張部27と第2膨張部28が形成される。この第1膨張部27と第2膨張部28の引張力及び押圧力が、弁部30の熱融着線31,32を介して、折れ曲り流路26内の弁部30の第1フィルム22と第2フィルム23間を密着させるように作用する。これにより、チェックバルブ装置21の弁部30は密閉され、袋部24への充填が完了した状態で、袋部24は膨張状態で保持されることとなる。 When air of an appropriate pressure is injected into the bag portion 24 and the filling is completed, as described above, as the bag portion 24 expands, the first and second sides of the bent flow path 26 of the check valve device 21, that is, the both sides of the valve portion 30 are changed. The 1st film 22 and the 2nd film 23 expand | swell, and the 1st expansion | swelling part 27 and the 2nd expansion | swelling part 28 are formed like FIG. 11 by the expansion | swelling. The tensile force and pressing force of the first expansion portion 27 and the second expansion portion 28 are applied to the first film 22 of the valve portion 30 in the bent flow path 26 via the heat fusion wires 31 and 32 of the valve portion 30. And the second film 23 are brought into close contact with each other. Thereby, the valve part 30 of the check valve device 21 is sealed, and the bag part 24 is held in an expanded state in a state where the filling of the bag part 24 is completed.
 なお、弁部の第1フィルム22と第2フィルム23間が引張及び押圧されて密着する際、袋部24の気体圧力により弁部30を通して空気が外に排出されようとするが、上記と同様に、第1フィルム22と第2フィルム23間の引張及び押圧による弁部30の狭窄により、弁部30を流れる気体の流速が増大して弁部30内に負圧が発生し、弁部30が大気圧により押圧されるので、この作用によっても空気の充填完了時、弁部30は確実に閉鎖することができる。 In addition, when the first film 22 and the second film 23 of the valve part are pulled and pressed to come into close contact with each other, air tends to be discharged through the valve part 30 due to the gas pressure of the bag part 24. Furthermore, due to the constriction of the valve portion 30 due to the tension and pressing between the first film 22 and the second film 23, the flow velocity of the gas flowing through the valve portion 30 increases, and a negative pressure is generated in the valve portion 30. Is pressed by the atmospheric pressure, the valve portion 30 can be reliably closed by this action when the air filling is completed.
 このように、単一の袋部24に空気(気体)を充填する場合においても、袋部24の上部に設けた気体注入路25に、熱融着線31~33によってチェックバルブ装置21を簡単に形成するのみで、密閉可能な逆止弁付き袋体を形成することができるので、空気セル緩衝材のほか、気体を充填して密閉するフィルム製の袋体であっても、本発明のチェックバルブ装置を簡便に適用することができる。 As described above, even when the single bag portion 24 is filled with air (gas), the check valve device 21 can be easily connected to the gas injection path 25 provided on the upper portion of the bag portion 24 by the heat-sealing wires 31 to 33. Since it is possible to form a bag body with a check valve that can be sealed only by forming the bag body, in addition to the air cell cushioning material, even a bag body made of a film that is filled with gas and sealed is of the present invention. A check valve device can be easily applied.
 図15はさらに他の実施形態の空気セル緩衝材を示し、上記図13、14の実施形態と同様な構成部分については、図15に上記と同じ符号を付してその説明を省略する。 FIG. 15 shows an air cell cushioning material of still another embodiment, and the same components as those of the embodiment of FIGS. 13 and 14 are given the same reference numerals as those of FIG.
 この例の空気セル緩衝材は、上記と同様、第1フィルムと第2フィルムを重ね合わせ、その周縁部を熱融着線34により包囲して袋部24を形成し、その袋部24の上部にチェックバルブ装置21を設けて構成される。気体注入路25は袋部24の上部に縦に(袋部24の長手方向に向けて)形成され、チェックバルブ装置29は、図15に示すように、その気体注入路25の末端部に、熱融着線31,32,37によって弁部35が形成される。 In the air cell cushioning material of this example, as described above, the first film and the second film are overlapped, and the peripheral portion thereof is surrounded by the heat-sealing wire 34 to form the bag portion 24, and the upper portion of the bag portion 24. Is provided with a check valve device 21. The gas injection path 25 is formed vertically (in the longitudinal direction of the bag part 24) at the upper part of the bag part 24, and the check valve device 29 is connected to the end part of the gas injection path 25 as shown in FIG. A valve portion 35 is formed by the heat fusion wires 31, 32 and 37.
 チェックバルブ装置29の弁部35は、図15に示すように、気体注入路25の端部両側に曲折する折れ曲り流路36を形成し、その内部を逆止弁とするように構成され、気体注入路25は周縁部の熱融着線34から縦に平行に延設された熱融着線31,32から形成され、気体注入路25の下側を覆うようにコ字状の熱融着線37を設けて、折れ曲り流路36を形成し、熱融着線31,32の上方に弁出口を形成して構成される。これにより、弁部35は気体注入路25の端部に設けた折れ曲り流路36によって構成されることとなる。 As shown in FIG. 15, the valve portion 35 of the check valve device 29 is formed so as to form a bent flow path 36 that bends on both sides of the end portion of the gas injection path 25, and the inside thereof serves as a check valve. The gas injection path 25 is formed of heat fusion lines 31 and 32 extending vertically and parallel from the peripheral heat fusion line 34, and a U-shaped thermal fusion is performed so as to cover the lower side of the gas injection path 25. A wire 37 is provided to form a bent flow path 36 and a valve outlet is formed above the heat fusion wires 31 and 32. Thereby, the valve part 35 is comprised by the bending flow path 36 provided in the edge part of the gas injection path 25. FIG.
 この図15のチェックバルブ装置29においても、上記と同様に、第1フィルムと第2フィルム間を熱融着線31,32,37によって、折れ曲り流路36を形成している。これにより、気体の充填時に折れ曲り流路36を密閉する弁部35は、第1フィルムの第1膨張部と第2フィルムの第2膨張部との間に形成され、気体の充填時、第1フィルムの第1膨張部と第2フィルムの第2膨張部が、両側から熱融着線31,32、37を介して弁部35のフィルムを引張及び押圧し、その第1フィルムと第2フィルム間を密着させ、チェックバルブ装置29としている。 In the check valve device 29 of FIG. 15 as well, the bent flow path 36 is formed between the first film and the second film by the heat-sealing wires 31, 32, and 37 as described above. Thereby, the valve part 35 which seals the bent flow path 36 at the time of gas filling is formed between the 1st expansion part of the 1st film, and the 2nd expansion part of the 2nd film. The first expansion part of one film and the second expansion part of the second film pull and press the film of the valve part 35 from both sides via the heat-sealing wires 31, 32, 37, and the first film and the second film The films are brought into close contact with each other to form a check valve device 29.
 この空気セル緩衝材に空気を注入する場合、上記と同様に、空気ポンプのノズルを気体注入路25に差し込み、空気を注入すると、空気は、折れ曲り流路36の弁部35を通り、袋部24に流入し、袋部24を膨張させていく。 When injecting air into the air cell cushioning material, the nozzle of the air pump is inserted into the gas injection path 25 and air is injected in the same manner as described above, and then the air passes through the valve portion 35 of the bent flow path 36 and passes through the bag. It flows into the part 24 and the bag part 24 is inflated.
 袋部24に適正圧力の空気が注入され、充填が完了すると、上記と同様に、袋部24の膨張に伴い、チェックバルブ装置29の折れ曲り流路36の両側つまり弁部35の両側の第1フィルムと第2フィルムが膨張し、その膨張によって第1膨張部と第2膨張部が形成される。この第1膨張部と第2膨張部の引張力及び押圧力が、弁部35の熱融着線31,32を介して、折れ曲り流路36内の弁部35の第1フィルムと第2フィルム間を密着させるように作用する。これにより、チェックバルブ装置の弁部35は密閉され、袋部24への充填が完了した状態で、袋部24は膨張状態で保持されることとなる。 When air of an appropriate pressure is injected into the bag portion 24 and the filling is completed, as described above, as the bag portion 24 expands, the second side of the bent flow path 36 of the check valve device 29, that is, on the both sides of the valve portion 35 is changed. The 1st film and the 2nd film expand | swell, and the 1st expansion | swelling part and the 2nd expansion | swelling part are formed by the expansion | swelling. The tensile force and pressing force of the first expansion portion and the second expansion portion are applied to the first film and the second film of the valve portion 35 in the bent flow path 36 via the heat fusion wires 31 and 32 of the valve portion 35. It acts to bring the films into close contact. Thereby, the valve part 35 of a check valve apparatus is sealed, and the bag part 24 will be hold | maintained in the inflated state in the state which the filling to the bag part 24 was completed.
 図16はさらに他の実施形態の空気セル緩衝材を示し、上記実施形態と同様な構成部分については、図16に上記と同じ符号を付してその説明を省略する。 FIG. 16 shows an air cell cushioning material according to another embodiment, and the same components as those in the above embodiment are denoted by the same reference numerals as those in FIG.
 この例の空気セル緩衝材は、上記と同様、第1フィルムと第2フィルムを重ね合わせ、その周縁部を熱融着線14により包囲して袋部4を形成し、その袋部4の上部の気体注入路5内にチェックバルブ装置49を設けて構成される。気体注入路5は袋部4の上部に横方向に向けて形成され、チェックバルブ装置49は、図16に示すように、その気体注入路5と袋部4とを仕切る熱融着線19の一部に弁部40が形成されて構成される。 In the air cell cushioning material of this example, as described above, the first film and the second film are overlapped, and the peripheral portion thereof is surrounded by the heat-sealing wire 14 to form the bag portion 4, and the upper portion of the bag portion 4. A check valve device 49 is provided in the gas injection path 5. The gas injection path 5 is formed in the upper part of the bag part 4 in the lateral direction, and the check valve device 49 has a heat sealing line 19 for partitioning the gas injection path 5 and the bag part 4 as shown in FIG. A valve portion 40 is formed in part and configured.
 チェックバルブ装置49の弁部40は、図16に示すように、気体注入路5と袋部4を仕切る熱融着線19の一部に開口を形成し、その開口した弁部40を上から覆うように、鈎型(L形)の熱融着線48を気体注入路5内に設けて形成される。L形の熱融着線48の元部は熱融着線19上に接続される。これにより、弁部40の上側に折れ曲り流路46が形成されることとなり、弁部40は気体注入路5の一部に設けた開口とそれに続く折れ曲り流路46によって構成されることとなる。 As shown in FIG. 16, the valve portion 40 of the check valve device 49 forms an opening in a part of the heat-sealing line 19 that partitions the gas injection path 5 and the bag portion 4, and the opened valve portion 40 is viewed from above. A saddle-shaped (L-shaped) heat-sealing wire 48 is provided in the gas injection path 5 so as to cover it. The base of the L-shaped heat-sealing wire 48 is connected to the heat-sealing wire 19. As a result, a bent flow path 46 is formed on the upper side of the valve section 40, and the valve section 40 is configured by an opening provided in a part of the gas injection path 5 and a subsequent bent flow path 46. Become.
 この図16のチェックバルブ装置49においても、上記と同様に、第1フィルムと第2フィルム間を熱融着線19,48によって、折れ曲り流路46を形成している。これにより、気体の充填時に折れ曲り流路46を密閉する弁部40は、第1フィルムの第1膨張部と第2フィルムの第2膨張部との間に形成され、気体の充填時、第1フィルムの第1膨張部と第2フィルムの第2膨張部が、両側から熱融着線19、48を介して弁部40のフィルムを引張及び押圧して収縮させ、それによって、弁部40を密閉状態としチェックバルブ装置49としている。 In the check valve device 49 of FIG. 16 as well, the bent flow path 46 is formed between the first film and the second film by the heat fusion wires 19 and 48 in the same manner as described above. Thereby, the valve part 40 which seals the bent flow path 46 at the time of gas filling is formed between the 1st expansion | swelling part of a 1st film, and the 2nd expansion | swelling part of a 2nd film. The first inflated part of one film and the second inflated part of the second film are contracted by pulling and pressing the film of the valve part 40 from both sides via the heat-sealing wires 19, 48. Is a check valve device 49.
 この空気セル緩衝材に空気を注入する場合、上記と同様に、空気ポンプのノズルを気体注入路5に注入口9から差し込み、空気を注入すると、空気は、折れ曲り流路46の弁部40を通り、袋部4に流入し、袋部4を膨張させていく。 When injecting air into the air cell cushioning material, the nozzle of the air pump is inserted into the gas injection path 5 from the injection port 9 and the air is injected as described above. And then flows into the bag part 4 to inflate the bag part 4.
 袋部4に適正圧力の空気が注入され、充填が完了すると、上記と同様に、袋部4の膨張に伴い、チェックバルブ装置49の折れ曲り流路46の両側つまり弁部40の両側の第1フィルムと第2フィルムが膨張し、その膨張によって第1膨張部と第2膨張部が形成される。この第1膨張部と第2膨張部の引張力及び押圧力が、弁部40の熱融着線19,48を介して、折れ曲り流路46内の弁部40のフィルムを収縮させ、フィルムに皺が寄り、フィルム間が密着する。これにより、チェックバルブ装置49の弁部40は密閉され、袋部4への充填が完了した状態で、袋部4は膨張状態で保持されることとなる。 When air of an appropriate pressure is injected into the bag portion 4 and the filling is completed, as described above, as the bag portion 4 expands, the second side of the bent flow path 46 of the check valve device 49, that is, on the both sides of the valve portion 40 is changed. The 1st film and the 2nd film expand | swell, and the 1st expansion | swelling part and the 2nd expansion | swelling part are formed by the expansion | swelling. The tensile force and pressing force of the first expansion portion and the second expansion portion cause the film of the valve portion 40 in the bent flow path 46 to contract through the heat- sealing lines 19 and 48 of the valve portion 40, and the film The wrinkles are close to each other and the films are in close contact. Thereby, the valve part 40 of the check valve device 49 is sealed, and the bag part 4 is held in an inflated state in a state where the filling of the bag part 4 is completed.
 なお、上記実施形態では空気セル緩衝材にチェックバルブ装置を適用した例を説明したが、フィルム製の風船のバルブに、本発明のチェックバルブ装置を適用することもできる。また、上記空気セル緩衝材は第1フィルムと第2フィルムを熱融着して形成したが、その外側にさらにフィルムを重ねて融着し、3枚以上のフィルムを重ねて熱溶着し、袋部及び弁部を形成することもできる。また、袋部の形状は、上記のような長方形、矩形のほか、多角形や円形とすることもできる。 In addition, although the example which applied the check valve apparatus to the air cell shock absorbing material was demonstrated in the said embodiment, the check valve apparatus of this invention can also be applied to the valve | bulb of film balloons. The air cell cushioning material is formed by heat-sealing the first film and the second film. The film is further overlapped on the outside, and three or more films are heat-welded to form a bag. Parts and valves can also be formed. Moreover, the shape of a bag part can also be made into a polygon and a circle other than the above rectangles and rectangles.
 1   チェックバルブ装置
 2   第1フィルム
 3   第2フィルム
 4   袋部
 5   気体注入路
 6   折れ曲り流路
 6a  弁入口
 6b  弁出口
 7   第1膨張部
 8   第2膨張部
 9   注入口
 10  弁部
 11  熱融着線
 12  熱融着線
 13  熱融着線
 14  熱融着線
 15  熱融着境界線
 17  セル用流路
 18  熱融着境界線
 19  熱融着境界線
 20  空気セル緩衝材
DESCRIPTION OF SYMBOLS 1 Check valve apparatus 2 1st film 3 2nd film 4 Bag part 5 Gas injection path 6 Bending flow path 6a Valve inlet 6b Valve outlet 7 1st expansion part 8 2nd expansion part 9 Inlet 10 Valve part 11 Thermal fusion Line 12 Thermal fusion line 13 Thermal fusion line 14 Thermal fusion line 15 Thermal fusion boundary line 17 Cell flow path 18 Thermal fusion boundary line 19 Thermal fusion boundary line 20 Air cell cushioning material

Claims (8)

  1.  第1フィルム及び第2フィルムを重ね合わせ、周縁部を熱融着して袋部が形成され、該袋部の端部に設けた気体注入路から該袋部内に気体を注入して充填するために、該気体注入路に設けられるチェックバルブ装置であって、
     該気体注入路から該袋部内に続く気体の流路として折れ曲り流路が、該第1フィルムと第2フィルム間を線状に熱融着した熱融着線により形成され、該折れ曲り流路内に弁部が設けられ、
     該気体注入路及び該折れ曲り流路の該弁部を通して気体を該袋部内に注入し、充填が完了して該袋部内に気体圧力が印加されたとき、該袋部側の該第1フィルムと第2フィルムの該気体圧力による膨張によって、該折れ曲り流路を形成する熱融着線を介して該第1フィルムと第2フィルムの一部に第1膨張部と第2膨張部が形成され、該第1膨張部と第2膨張部により該折れ曲り流路内の該弁部の該第1フィルムと第2フィルムが引張及び押圧されて相互に密着し、該折れ曲り流路の該弁部が密閉されることを特徴とするチェックバルブ装置。
    The first film and the second film are overlapped, and the peripheral portion is heat-sealed to form a bag portion, and gas is injected into the bag portion from the gas injection path provided at the end portion of the bag portion for filling. A check valve device provided in the gas injection path,
    A bent flow path as a gas flow path that continues from the gas injection path into the bag portion is formed by a heat-sealed wire in which the first film and the second film are heat-sealed linearly, and the bent flow There is a valve in the road,
    When the gas is injected into the bag part through the valve part of the gas injection path and the bent flow path, and the filling is completed and the gas pressure is applied to the bag part, the first film on the bag part side As a result of the expansion of the second film by the gas pressure, a first expansion portion and a second expansion portion are formed in a part of the first film and the second film via a heat-sealing line that forms the bent flow path. The first film and the second film of the valve section in the bent flow path are pulled and pressed by the first expansion section and the second expansion section to be in close contact with each other, and the bent flow path A check valve device, wherein a valve portion is sealed.
  2.  前記折れ曲り流路の前記弁部の幅は、該袋部の幅の1/4より短く且つ該幅の1/25より長く形成され、且つ該弁部の幅は、該袋部が膨張した際の前記第1膨張部と第2膨張部の最大膨張幅の1/4より短く且つ該最大膨張幅の1/25より長く形成されたことを特徴とする請求項1記載のチェックバルブ装置。 The width of the valve portion of the bent flow path is shorter than 1/4 of the width of the bag portion and longer than 1/25 of the width, and the width of the valve portion is expanded by the bag portion. 2. The check valve device according to claim 1, wherein the check valve device is formed to be shorter than ¼ of the maximum expansion width of the first expansion portion and the second expansion portion and longer than 1/25 of the maximum expansion width.
  3.  前記気体注入路は前記折れ曲り流路に対し略直角に形成され、該気体注入路の端部に気体の注入口が形成されたことを特徴とする請求項1記載のチェックバルブ装置。 The check valve device according to claim 1, wherein the gas injection path is formed substantially at right angles to the bent flow path, and a gas injection port is formed at an end of the gas injection path.
  4.  前記気体注入路と前記折れ曲り流路が一体に形成され、該折れ曲り流路の端部に気体の注入口が形成されたことを特徴とする請求項1記載のチェックバルブ装置。 The check valve device according to claim 1, wherein the gas injection path and the bent flow path are integrally formed, and a gas injection port is formed at an end of the bent flow path.
  5.  前記折れ曲り流路は前記袋部の外側であって前記気体注入路内に形成され、前記弁部が該袋部と該気体注入路を仕切る熱融着線の一部に形成されたことを特徴とする請求項1記載のチェックバルブ装置。 The bent flow path is formed outside the bag part and in the gas injection path, and the valve part is formed in a part of a heat-sealing line that partitions the bag part and the gas injection path. The check valve device according to claim 1, wherein
  6.  前記折れ曲り流路の弁部が、前記第1フィルムと第2フィルム間を線状に熱融着して複数の空気セルを形成する空気セル緩衝材の気体注入路に設けられたことを特徴とする請求項1記載のチェックバルブ装置。 The valve portion of the bent flow path is provided in a gas injection path of an air cell cushioning material that forms a plurality of air cells by linearly heat-sealing the first film and the second film. The check valve device according to claim 1.
  7.  前記複数の空気セルを設けた空気セル緩衝材には、前記弁部を有する折れ曲り流路が各々の該空気セルに設けられたことを特徴とする請求項6記載のチェックバルブ装置。 The check valve device according to claim 6, wherein the air cell cushioning material provided with the plurality of air cells is provided with a bent flow path having the valve portion in each air cell.
  8.  第1フィルム及び第2フィルムを重ね合わせ、周縁部を熱融着して複数の空気セルとなる袋部が形成され、該袋部の端部に設けた気体注入路からチェックバルブ装置を通して該袋部内に気体を注入して充填する空気セル緩衝材であって、
     該チェックバルブ装置には、折れ曲り流路が、該第1フィルムと第2フィルム間を線状に熱融着した熱融着線により、該気体注入路から該袋部内に続く気体の流路として形成され、該折れ曲り流路内に弁部が設けられ、
     該気体注入路及び該折れ曲り流路の該弁部を通して気体を該袋部内に注入し、充填が完了して該袋部内に気体圧力が印加されたとき、該袋部側の該第1フィルムと第2フィルムの該気体圧力による膨張によって、該折れ曲り流路を形成する熱融着線を介して該第1フィルムと第2フィルムの一部に第1膨張部と第2膨張部が形成され、該第1膨張部と第2膨張部により該折れ曲り流路内の該弁部の該第1フィルムと第2フィルムが引張及び押圧されて相互に密着し、該折れ曲り流路の該弁部が密閉されることを特徴とする空気セル緩衝材。
    The first film and the second film are overlapped, and the peripheral portion is heat-sealed to form a bag portion that becomes a plurality of air cells, and the bag is passed through a check valve device from a gas injection path provided at the end of the bag portion. An air cell cushioning material that is filled by injecting gas into the part,
    In the check valve device, the bent flow path is a gas flow path that continues from the gas injection path into the bag portion by a heat-sealing line in which the first film and the second film are heat-sealed linearly. A valve portion is provided in the bent flow path,
    When the gas is injected into the bag part through the valve part of the gas injection path and the bent flow path, and the filling is completed and the gas pressure is applied to the bag part, the first film on the bag part side As a result of the expansion of the second film by the gas pressure, a first expansion portion and a second expansion portion are formed in a part of the first film and the second film via a heat-sealing line that forms the bent flow path. The first film and the second film of the valve section in the bent flow path are pulled and pressed by the first expansion section and the second expansion section to be in close contact with each other, and the bent flow path An air cell cushioning material characterized in that a valve portion is hermetically sealed.
PCT/JP2013/061150 2012-04-20 2013-04-15 Check valve device WO2013157509A1 (en)

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JP2016050028A (en) * 2014-09-01 2016-04-11 克敏 吉房 Exhaust valve device and gas cushion material
CN110466890A (en) * 2019-09-10 2019-11-19 杭州巨杰包装科技有限公司 Novel air buffer body and preparation method thereof with lock airway dysfunction
JP7113552B1 (en) * 2021-05-14 2022-08-05 均 佐武 film assembly
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