JP3193730B2 - Valve structure and restoration prevention body of deaerated packaging bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve structure of a degassing packaging bag which can be easily degassed by a vacuum cleaner or the like to perform degassing packaging (vacuum packaging), and a restoration preventing member in a degassed packaging state. .

[0002]

2. Description of the Related Art Conventionally, deaerated packaging (vacuum packaging) has been used for food products,
It is frequently used for machine parts, chemicals, fibers, etc. In particular, in recent years, as a part of space saving in logistics, deaeration of the distribution of large and bulky air content products such as cotton, wool, feather and other fiber raw materials and products using them, and urethane foam of chemical products etc. The use of packaging contributes to cost and space savings. In conventional degassing packaging, a bag formed of a film with high air impermeability is filled with the contents, and air is evacuated from the opening in the chamber of the degassing packaging machine. It is sealed (for example, JP-A-59-51019). On the other hand, a simple degassing packaging bag that can be easily degassed without using a degassing chamber is also provided. In a conventional simple degassing packaging bag, a suction valve for degassing is composed of two guide pieces forming an air flow passage (valve hole), and the valve hole is opened by inserting a suction nozzle into the valve hole. So that the air inside the bag can be sucked (for example, JP-A-1-99925,
Japanese Utility Model Application Laid-Open No. 62-99534). In general, when the pressure in the bag is positive, it is easy to provide a check valve so that the air in the bag does not leak, and many types have been proposed (for example, Japanese Patent Publication No. 64-9214). And JP-A-63-46117). However, in the case of vacuum packaging, since the pressure in the bag is negative, it is difficult to maintain the valve in a non-return state against the atmospheric pressure with the pressure in the bag as in positive pressure packaging. A simple valve element that reliably performs a check valve function by a deaeration valve of a packaging bag has not been proposed.

[0003]

In the case of degassing packaging, the basic condition is to seal the bag. However, after filling the contents of the bag conventionally, the bag mouth can be easily sealed, and a long time is required. There is no sealing means that meets the requirement of being able to remain sealed over time. For example, fasteners and the like are easy to handle, but lack sealability. In addition, sealing with an adhesive tape lacks durability, and dust and the like easily adhere to an adhesive surface, and lacks reliability and sealing performance. For this reason, the sealing of the bag mouth of this type of bag is conventionally performed exclusively by heat sealing. However, heat sealing requires a special heat sealer, and there is a drawback that it cannot be easily performed at home or the like. If there is no heat sealer, it is possible to carry out with an iron, but it is difficult to control the temperature and it is difficult to seal well. In the case of heat sealing,
The bag must be made of a thermo-adhesive resin, and the material of the packaging bag is limited. Furthermore, since the heat-sealed portion cannot be opened, the bag must be broken when unpacking, and the sealed packaging bag cannot be used repeatedly.

On the other hand, in the conventional degassing valve of the simple degassing packaging bag, the two guide pieces come into contact with each other and close the valve hole by pulling out the nozzle from the valve hole after the degassing is completed. Extremely weak air enters, or foreign matter easily enters by inserting foreign matter into the valve hole,
It was difficult to reliably maintain degassed packaging. Also,
In this case, a special suction nozzle to be inserted into the valve hole is required, and there is a drawback that degassing cannot be performed simply by applying a suction port of a vacuum cleaner or the like. Further, the structure of the valve body is complicated, so that it cannot be easily attached to the bag body, and there is a disadvantage that the cost is increased. In addition, the structure and material of the packaging bag are limited by the material of the packaging bag to be attached, and the filling in the bag is also sucked when suctioning, so the applicable contents are limited to solids, There is a problem that the method cannot be applied to a granular material or fine feathers. Furthermore, as a problem of the conventional degassing packaging, in addition to the above, if a pinhole is generated in a bag during the process of distribution, use, storage, etc., air flows in even if the bag is bent and degassed. There is a problem that it is not possible to prevent the accident of restoring.

SUMMARY OF THE INVENTION The present invention is to solve the above problems of the conventional degassing packaging at once, and the first object of the present invention is to provide a simple suction device without requiring a special degassing packaging machine. It can be easily degassed and packed at home, etc., and after degassing, the valve hole is automatically closed and the degassed state can be reliably maintained. Not only solids but also powders, granules, feathers, etc. Degassing also applicable
An object of the present invention is to provide a valve structure for a packaging bag . Second purpose
It is an object of the present invention to provide a deaeration package with a restoration preventing body for preventing expansion of the deaeration package when the sealing state of the deaeration packaging bag is broken.

[0006]

According to the present invention, there is provided a valve structure of a deaerated packaging body which solves the above-mentioned problems.
Valve structure for deaeration of the deaeration packaging bag
Around the air vent formed in the wall film of the packaging bag.
And a valve guide hole with a diameter larger than that of the deaeration port.
A valve body guide plate formed of a transient material;
A valve body which is loosely fitted in a valve guide hole and has a lower surface having close contact properties,
Provided on the lower surface of the valve body guide panel and smaller in diameter than the valve guide hole
Seat made of an air-impermeable material having a valve hole formed therein
And is located above the valve body in the valve guide hole.
As described above, the air-permeable elastic body is provided .

As a means for preventing the contents from being sucked in during degassing, a filter is provided on the inner side of the valve seat so as to cover the valve hole. This has made possible the deaeration packaging of relatively fine articles. In order to make the resistance at the time of suction uniform, it is desirable to attach an air-impermeable cover sheet or a microporous sheet to the lower surface of the filter. In order to reinforce the bag wall around the deaeration port, a reinforcing sheet is provided on the top surface of the valve body guide panel. Further, the valve body or the valve seat and the reinforcing sheet are formed of magnets, and the valve body is urged toward the valve seat side by magnetic force or by an elastic force with an elastic body interposed above the valve body to seal the valve body. Has been improved. The valve body and the valve seat need not necessarily be planar shapes, and the valve seat may have a cylindrical portion protruding around the valve hole, and the valve body may be formed in a cap shape. The valve structure of the air supply packaging bag can be achieved by loosely fitting the valve structure of the degassing packaging bag in a state where the valve body is inverted to the valve guide hole.

Further , the restoration preventing body of the degassed packaging bag of the present invention.
Put the packaged product on a degassed packaging bag
The degassed packaging bag is restrained around the degassed packaging bag.
A degassing packaging bag restoration prevention body for preventing restoration of
A bag large enough to fit a deaerated packaging bag
The tube body is formed from a plastic sheet,
That a circular or elliptical hole was formed on the entire surface or a part of the
And therefore a certain degree of elasticity
A net-shaped bag that can be wrapped
Even if the garment expands and tries to restore it to its original state,
The restoration can be prevented by restricting the peripheral surface.

[0009]

[Function] By adopting the valve of the above structure, degassing packaging
In the case of, apply a suction device such as a vacuum cleaner to the
When suction starts, the valve is sucked up by the suction force.
The valve hole is opened and the top surface is on the wall film side.
, But the upper surface of the valve body and the vent are kept ventilated.
Therefore, suction is possible. That is, thereby, the present invention
The valve structure is a check valve that allows ventilation in only one direction.
Has a function. The air in the bag is filled by suction
Is discharged through the inside of the bag,
Even the filling is disturbed by the filter and outside
It will not be sucked in.

[0010] When the suction is completed, the valve body is pulled inside by the negative pressure in the bag, moves and comes into close contact with the valve seat, closes the valve hole, and then the vacuum in the bag is maintained. In particular, the valve body is always urged in the direction in which the valve body and the valve seat are in close contact with each other due to the restoring force of the elastic body provided at the top of the valve body. The deaeration state can be maintained satisfactorily for a long time without moving. In the case of an air supply packaging bag, the state of the valve body is reversed, so that the bottom surface having a rough surface comes into contact with the valve seat during air supply, so that air can flow into the bag from the gap and air supply. Is completed, the upper surface of the valve body closes the air supply port due to the internal pressure of the bag, thereby preventing the inside air from leaking.
The valve structure of the present invention can be constituted by a combination of a synthetic resin sheet or the like, is not bulky, has no inherent hardness of a solid material, and does not have a risk of damaging the wall film of the bag body. Also,
It can also be produced simply by bonding, and can be achieved by simply attaching it to the vent or air supply opening of the bag.

[0011] The deaerated packaging restoration preventive body has a certain degree of elasticity caused by punching a circle or an ellipse into a cylindrical bag or sheath formed of a plastic sheet, and the article in the deaerated package state is obtained. It is possible to cope with the difference in volume, and always keeps a state of fitting to the outer peripheral surface of the degassed package, and wraps the package with a net. Therefore, even if the degassed state is broken and the packaged object expands and attempts to restore to the original shape, the outer peripheral surface is restrained by the restoration preventing body and the restoration is prevented.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a valve structure of a deaerated packaging bag according to the present invention. In the figure, reference numeral 1 denotes a wall film formed of an air-impermeable material of a packaging bag body, and has a circular deaeration port 2 for deaeration as shown in the figure. The valve structure of the present embodiment is provided on the back side of the wall film 1 so as to cover the deaeration port 2 and is adhered thereto. The valve body guide plate 6 made of an air-impermeable material, Valve seat 8 formed of a material of
A filter 10 formed of a gas-permeable material and a cover sheet 12 formed of an air-impermeable material are sequentially laminated, and integrated via double-sided adhesive sheets 5, 7, 9, and 11. A valve guide hole 13 having a diameter larger than that of the deaeration port 2 is formed in the valve body guide plate 6, and a valve hole 16 is formed in the valve seat 8 and the double-sided adhesive sheet 9. In the valve guide hole 13, a valve body 17 that moves up and down by moving the valve hole 16 up and down is loosely fitted. The valve body is configured such that the lower surface has a smooth surface so as to have good adhesion to the valve seat, and the upper surface has a rough surface that allows ventilation. In this embodiment, the valve body has a two-layer structure, and the lower portion 18 has no air. Transparent plastic sheet, top 1
9 is formed of an air-permeable nonwoven fabric and is integrated via an adhesive layer. In addition, a sealing sheet 20 that covers the air vent of the wall film of the bag body is peelably adhered to the outside of the bag. Instead of interposing a double-sided adhesive sheet, it is of course possible to directly bond each sheet with an adhesive. In addition, as the material of the filter, any material can be used as long as it is breathable and has a roughness such that the filling in the bag cannot pass therethrough.For example, a foamed plastic film or a nonwoven fabric made of open cells, A woven material, a plastic film having multiple pores, or the like can be employed.

Next, a method of using the valve structure constructed as described above will be described. The bag provided with the valve structure is filled with contents such as feathers, and the opening of the bag is sealed. Next, the sealing sheet 20 attached to the deaeration port 2 is peeled off, and the tip of a suction cylinder of a suction device such as a vacuum cleaner is pressed against the deaeration port to start suction. Note that the sealing sheet 20 may be preliminarily peelably attached to the deaeration port, or may be separately stored by attaching a release paper to the adhesive surface. By starting suction, the valve element 17
Is sucked up, its lower surface opens the valve hole 16 and its upper surface contacts the wall film 1, but the upper surface of the valve body 17 has a breathable layer formed thereon, so that suction is possible. The air in the bag is sucked from the outer peripheral portion of the side surface of the filter by suction, passes through the filter, passes through the valve hole through the valve hole, and is discharged from the upper portion of the valve body through the air vent. At this time, the lower surface of the filter is covered with an air-impermeable cover sheet 12.
, The air is uniformly sucked from the peripheral side surface of the filter, and can be efficiently sucked without being intensively sucked from the filter portion below the valve hole. When the suction is completed and the suction cylinder is separated from the deaeration port, the valve body 17 is pulled inside by the negative pressure in the bag and moves to come into close contact with the valve seat 8, close the valve hole 16, and close the valve hole. A vacuum is maintained. Then, by adhering the sealing sheet 20 from the outside and closing the deaeration port, it is possible to more securely seal and maintain the state. The sealing sheet is not always necessary, but is provided to more reliably maintain a vacuum state for a long time.

FIGS. 4 to 11 show another embodiment of the valve structure of the present invention. In the following embodiments, the same members as those in the embodiment of FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. Only the features will be described in detail. In the embodiment of FIG. 4, the filter 21 includes two types of filter materials 21a,
The cover sheet 27 which is formed by laminating 21b and adhered to the back surface side thereof employs a fine perforated film.
The valve body 22 is formed of an air-impermeable material, and has a plurality of projections 23 formed on the upper surface thereof so that air can flow even when the valve body 22 comes into contact with the wall film 1.
Further, in this embodiment, since the cover sheet 27 uses a fine perforated sheet, it is slightly sucked from the cover sheet when sucking. Since the filter has a two-layer structure, the filter effect is higher, which is suitable when the content is a powder or the like. The upper surface of the valve body may be roughened so that it can be ventilated. Any structure may be used as long as the valve body can be ventilated in contact with the wall film. An example is shown in FIG. The valve element 17a in FIG. 9A has an upper surface formed of a coarse nonwoven fabric 23, the valve element 17b in FIG. 9B has an upper surface in a matte pattern 24, and the valve element 17c in FIG. And the valve element 17d in (d) shows a plurality of grooves 26 provided on the upper surface.

The embodiment shown in FIG. 6 is different from the embodiment shown in FIG. 1 in that the valve body guide plate and the valve seat are provided outside the wall film. A small-diameter suction hole 32 is formed on the upper surface of the hole 31, and the lower surface is open as in the above-described embodiment. And the valve seat 33
The valve hole 34 and the air vent of the wall film 1 overlap and communicate with each other. Other configurations are almost the same as those of the first embodiment. The embodiment shown in FIG. 7 utilizes magnetic force to prevent the valve body from moving unnecessarily in the compressed and wrapped state, and to further improve the sealing performance. That is, the valve seat 40 is formed of a magnetic material made of a plastic laminate sheet using iron foil, the valve body 41 is formed of a plastic magnet,
Both are designed to suck each other. Therefore, in the case of this embodiment, in a state where the inside of the bag is evacuated, the valve body maintains the close contact state with the valve seat 40 by the suction action and the magnetic force by the negative pressure, and the negative pressure state is not easily broken. The attraction force of the magnet is selected so as to have a magnetic force enough to be able to open the valve hole by being attracted by the attraction force of the attraction device during degassing. Reference numeral 42 denotes a reinforcing sheet for reinforcing the bonding surface with the wall film, and a hole 43 is formed in the center portion so as to coincide with the deaeration port 2.

FIG. 8 shows still another embodiment in which the sealing property of the valve is enhanced by magnetic force. In the present embodiment, the valve body 45 and the valve seat 46 are both made of magnets, and the reinforcing sheet 47 made of a plastic magnet having an opening 48 at the upper part of the valve body guide plate 6 which communicates with the air vent of the bag.
Is provided. The upper surface of the valve body has the same magnetic pole surface as the magnetic pole on the lower surface of the magnet sheet, and the lower surface is different from the upper surface of the valve seat, and the valve body is formed by the attractive force and the repulsive force of the magnet. In a normal state, the valve is in close contact with the valve seat and the valve hole is sealed. In the embodiment of FIG. 9, a gas-permeable elastic body 53 such as a sponge is interposed in the space between the valve body 50 and the reinforcing sheet 51 of the deaeration port. Therefore, in this case, the valve body 50
It is not always necessary to make the upper surface of the valve body rough, and when the suction device is applied to the deaeration port 2 to start suction, the suction
0 rises while compressing the elastic body 53, the valve hole 16 opens, and the air in the bag is sucked out. When the suction is completed, the elastic body is restored to its original state by the restoring force, and presses the valve body 50 against the valve seat 8 to prevent the valve body 50 from being separated from the valve seat surface, thereby removing the air. To maintain. Therefore, the elastic body acts as a filter and a spring. In the above valve structure, the upper surface of the valve body is roughened except for the embodiment of FIG.
When the valve body comes into contact with the wall film or the reinforcing sheet, air may flow from the contact portion and flow to the deaeration port,
Conversely, the same function is achieved even if the surface on the side of the deaeration port where the upper surface of the valve element contacts is made rough. 10 and 11 show an embodiment in which the deaeration port side is made rough. In FIG. 10, the lower surface of the reinforcing sheet 55 at the deaeration port is a rough surface 56 on which projections and the like are formed, and the upper surface of the valve body 57 is not rough.

In the embodiment shown in FIG. 11, a filter 60 is adhered to the back surface of the reinforcing sheet 61 so as to correspond to the rough surface in the embodiment shown in FIG. The filter has such a hardness as to maintain an air flow passage communicating with the peripheral surface thereof even if the valve body 62 is brought into close contact with the filter by suction, and is formed so as not to hinder the suction. The valve seat 63 has a cylindrical portion 64 protruding into the valve guide hole 65 and is formed integrally with the valve body guide board 66. The valve element 62 is formed in a cap shape so as to be fitted to the cylindrical portion 64 so as to prevent the valve element from being eccentric. Although various embodiments of the valve structure of the present invention have been described above, the present invention is not limited to these embodiments.
For example, if the partial configuration disclosed in each of the above embodiments is adopted in another embodiment, a valve structure different from that of the above embodiment can be obtained. Further, the valve guide board and the valve seat are not necessarily separate bodies, but may be formed integrally. The filter does not necessarily need to be provided as long as there is no possibility that the contents will escape from the ventilation hole to the outside. Furthermore, if the valve structure of the present invention is not only deaerated of the bag containing the solid matter, but also applies a membrane that does not allow moisture to pass through the filter through the air,
Deaeration of the bag with liquid is also possible. In the case of an air supply packaging bag in which air or other gas is introduced into the bag and the bag is sealed in an inflated state, the valve body is inserted into the valve guide hole with the rough surface facing down, as opposed to the above embodiment. A detailed embodiment will be omitted since it may be fitted.

Next, an embodiment of a deaerated packaging bag to which the above-mentioned valve structure is applied will be described with reference to FIGS. FIG. 12 shows a front view of the degassed packaging bag 70. The front wall 72 and the back wall 73 are made of various soft plastic films such as, for example, vinyl chloride resin, vinylon, polyethylene, and polypropylene, or these films or metal foil. An air-impermeable film composed of laminated laminate films and the like, and at least the back surface is formed of a heat-adhesive film. A hole serving as a deaeration port is formed at an appropriate position on one of the front wall 72 and the back wall 73 (in this embodiment, the front wall), and the valve structure 74 described in the above embodiment is adhered to the inside of the hole. And attach it. Then, the front wall 72 and the back wall 73 are overlapped, and three sides are heat-sealed and adhered to each other except for one side serving as an opening to form a bag. 75 and 75 are sealing tapes adhered to the inner surface of the bag opening to seal the opening of the bag so that the opening can be opened and closed, and a non-adhesive pressure-bonding self-fusion layer is formed on the upper surface of the heat-adhesive tape base material. It is formed of a non-adhesive pressure-bonding self-fusion film. The non-adhesive pressure-bonding self-fusing film is a film in which the self-fusing surface is formed of a mixture of rubber latex and a water-soluble adhesive, and has the property that only the same film adheres to each other. But it does not adhere to other substances. Therefore, even if the object to be packaged is feathers or cotton, it does not adhere to the adhesive surface at the time of filling, and the adhesive surface is always kept smooth and a completely sealed state is maintained. Then, since bonding is performed by simply applying pressure with a finger, a special sealer such as a heating device is not required, and sealing can be easily performed. When the bag is opened, it can be easily opened by pulling both walls against the adhesive force, and can be used repeatedly.

Reference numeral 76 denotes an adhesive layer for adhering the sealing tapes 75, 75 to the inner surfaces of the front and back walls of the bag. An appropriate means such as a heat seal film, a double-sided adhesive tape, or a direct adhesive can be used. Reference numeral 77 denotes a spot seal portion provided for strongly bonding both ends of the bag opening to firmly fix the sealing tape and reinforcing the bag opening end. The spot seal part 77 is a part connected to the bag side edge,
As shown in FIG. 12, the sealing tape and the adhesive layer are cut out in a semicircular or semi-elliptical shape so that the inner surface of the front wall and the inner surface of the back wall can be directly bonded to each other. Directly adheres to the back wall and is firmly integrated. Thereby, the side edge of the bag mouth is reinforced, and air leakage from the end can be prevented. Note that the shape of the spot seal portion is not limited to that of the present embodiment,
An appropriate shape such as a triangular shape or a rectangular shape can be adopted as in the spot seal portions 80 and 81 shown in (A) and (B). As described above, according to the present invention, it is possible to obtain a deaerated packaging bag in which the bag opening and the deaeration valve are highly sealed and sealed, and a deaerated packaging state can be obtained for a long time. However, if pinholes etc. occur on the bag wall and the degassing state in the bag is broken,
An accident may occur in which the packaged object is restored to its original state and expanded. An embodiment of the restoration preventing device according to the present invention for preventing such a situation will be described with reference to FIGS.

The anti-restoration body 90 of the present embodiment is formed on one or both surfaces of a part or the whole of a tubular plastic film 91 manufactured in accordance with the volume of a compressed state.
An elliptical or circular hole 92 is formed by punching, and both ends or one of the holes 92 is opened. The plastic film can be formed from an appropriate material such as polyethylene, polypropylene, or a laminated film. By providing a circular or elliptical hole in the plastic film, the bag has elasticity, so that even if the volume of the compression bag changes within a certain range, it can be handled. By changing the difference between holes, the shape or direction of a circle or an ellipse, the number of holes, and the like, it is possible to change the strength of elasticity and the corresponding force such as binding power.
By covering the bag in which the package is compressed and covered with the restoration preventing body 90 as shown in FIG. 18 and restraining the periphery of the packaging bag, the degassed state of the degassed packaging bag is broken. Air flows into the bag from the outside, and even if the packaged goods are about to be restored, they will be in the same state as if they were bound by the net, and the plastic film that constitutes the restoration prevention body will expand beyond the stretchable range Cannot be performed, and the compressed packaging state is maintained. Therefore, the destruction of the compressed package due to pinholes and the like, which is the biggest drawback of the conventional compressed package, can be released. The restoration preventing body is not limited to the one in the above embodiment,
For example, a stretchable net bag may be formed in the shape of an expanded ring metal using a synthetic resin, and then used.

[0021]

The present invention has the above-described configuration,
The following special effects are achieved. Departure of the present invention
According to the valve structure of the air package, a valve having a check valve function is used.
The valve hole is automatically closed after degassing.
Degassed packaging that can completely maintain the degassed state
Easy degassing at home etc. with a simple suction device without the need for a machine
Can be packaged. In particular, according to the first aspect of the present invention, the suction is completed.
When completed, the elastic body returns to its original state due to its restoring force.
The valve body against the valve seat to prevent the valve body from separating from the valve seat surface.
Since the operation is stopped, the deaerated state can be reliably maintained.
Since it can be formed of a flexible material such as a plastic sheet and can be formed thin, it does not damage the wall film of the packaging bag. According to the configuration of the second aspect, since the filter is provided , even if the filler is a filler such as a feather or a powder, it can be effectively degassed. By affixing the cover sheet to the lower surface of the filter, uniform suction can be performed. Since the valve body is urged to the valve seat by the magnetic force or the restoring force of the elastic body, the valve body does not move unnecessarily, and the deaerated state can be maintained for a long time. In addition, since the air supply port of the valve structure of the air supply packaging bag is automatically closed in that state, air supply and packaging can be easily performed without leaking the internal air. further,
According to the configuration of claim 6, the valve seat projects into the valve guide hole.
Having a cylindrical portion formed integrally with the valve body guide plate,
Is in the shape of a cap so as to fit externally to the cylindrical part
Therefore, eccentricity of the valve body can be prevented,
An airtight seal can be achieved. The degassing packaging restoration prevention body can cope with the difference in the volume of articles in the degassed packaging state, keeps a state that always fits on the outer peripheral surface of the degassed packaging body, Even if it expands and tries to restore to its original shape, the restoration can be reliably prevented in the same manner as when it is restrained by the net. And it is easy to manufacture and can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a valve structure according to an embodiment of the present invention.

FIG. 2 is a perspective view thereof.

FIG. 3 is an exploded view thereof.

FIG. 4 is a side sectional view of a valve structure according to another embodiment.

FIG. 5 is a perspective view of each embodiment of the valve body.

FIG. 6 is a side sectional view of a valve structure according to another embodiment.

FIG. 7 is a side sectional view of a valve structure according to another embodiment.

FIG. 8 is a side sectional view of a valve structure according to another embodiment.

FIG. 9 is a side sectional view of a valve structure according to another embodiment.

FIG. 10 is a side sectional view of a valve structure according to another embodiment.

FIG. 11 is a side sectional view of a valve structure according to another embodiment.

FIG. 12 is a front view of a deaerated packaging bag according to an embodiment of the present invention.

FIG. 13 is a front view of a spot seal portion according to another embodiment.

FIG. 14 is a sectional view taken along line AA of FIG.

FIG. 15 is a sectional view taken along the line BB of FIG. 12;

FIG. 16 is a schematic view of a deaerated packaging bag according to an embodiment of the present invention.

FIG. 17 is a schematic view of a deaerated packaging bag in a state in which a deaerated package is stored.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wall film 2 Deaeration port 6,30,50,66 Valve body guide panel 8,3,40,46,63 Valve seat 10,21 Filter 12,27 Cover sheet 13,31,65 Valve guide hole 17,22, 41, 50, 57, 62 Valve element 70 Deaeration packaging bag 75 Sealing tape 77, 80, 81 Spot seal part 90 Restoration prevention tool 92 hole

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-32992 (JP, A) JP-A 63-114943 (JP, U) JP-A 57-88745 (JP, U) JP-A 55-88 153342 (JP, U) Japanese Utility Model 60-68078 (JP, U) Japanese Utility Model 63-94137 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65D 33/01-33 / 20 B65B 31/02 B65D 30/24 B65D 85/18 B65D 81/20 B65D 88/16

Claims (8)

(57) [Claims] 1. A degassing valve structure for a degassing packaging bag formed of an air-impermeable flexible material, wherein the valve structure is bonded around a degassing opening formed in a wall film of the packaging bag. A valve body guide plate having a valve guide hole having a diameter larger than the deaeration port and formed of an air-impermeable material, a valve body having a lower surface which is loosely fitted to the valve guide hole of the valve body guide plate and has close adhesion; the valve body guide plate of provided on the lower surface consists of the valve guide bore from the valve seat which the valve hole is formed in the formed air-impermeable material of small diameter, the valve moth
Breathable elastic so that it sits on top of the valve body in the id hole
Valve structure of vacuum-packed bag, characterized in that a body. 2. A vacuum-packed bag of the valve structure according to claim 1, wherein the filter on the lower surface of the valve seat is bonded. Wherein said valve body guide plate and the valve seat is bonded to the outside of the wall film of vacuum-packed bags, vacuum-packed bag of claim 2, wherein said filter is bonded to the inner wall film Valve structure. Wherein said valve body is vacuum-packed bag of the valve structure so biased by being claim 1, 2 or 3 wherein as to be in close contact with the valve seat by the magnetic force. 5. The valve structure of a degassed packaging bag according to claim 1, wherein a reinforcing sheet having a hole formed in the upper surface of said valve body guide board, the hole being coincident with the air vent of the bag body is provided. body. 6. A degasser made of an air-impermeable flexible material.
A valve structure for deaeration of a packaging bag, wherein the wall structure of the packaging bag is provided.
Glued around the deaeration port formed in the
It has a large diameter valve guide hole and is made of air-impermeable material.
Valve body guide plate, which is loosely fitted in the valve guide hole of the valve body guide plate
And the lower surface of the valve body guide plate, the lower surface of which has close contact.
And a valve hole smaller in diameter than the valve guide hole was formed.
A valve seat formed of an air-impermeable material;
Has a cylindrical portion protruding from around the valve hole, and the valve body is
A valve structure for a deaerated packaging bag, wherein the valve structure is formed in a top shape . 7. The valve structure for a degassing packaging bag according to claim 6, wherein a filter is provided inside the peripheral wall of the degassing port. 8. A package to be packaged in a degassed packaging bag obtained by compressing and packaging a packaged product.
And by restraining the periphery of the deaerated packaging bag,
A degassing packaging bag restoration prevention body that prevents restoration of the degassing packaging bag.
Thus, the deaerated packaging bag obtained by compressing and packaging the article to be packaged can be fitted.
A restoration preventive body for a degassed packaging bag , wherein a tube having a size is formed of a plastic sheet, and a circular or elliptical hole is formed on the entire surface or a part of the tube.