JP3099227U - Check rubber sheet valve and storage bag with check rubber sheet valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a simplified check valve structure, simplified installation work, and reduced cost of a storage bag.
SOLUTION: A sheet small piece 4 forming a part of a gas barrier bag body 3 of a storage bag 1 is superimposed on the sheet small piece 4 and peripheral edges thereof are partially bonded to each other so that a part of the peripheral edge portion is in relation to the sheet small piece 4. The small free rubber sheet 7 is formed at the free end 9 which is free. A small hole 8 is perforated in the center of the sheet piece 4, and two or more flats extending radially from the small hole 8 to the free end (9) between the sheet piece 4 and the small thin rubber sheet 7. The air passages 11, 11 function as a check valve which closes the small holes 8 and the air passages 11, 11 at normal times and opens them at exhaust time.
[Selection diagram] Fig. 1

Description

The present invention provides a non-return rubber sheet valve that can be easily and securely attached to a storage bag for maintaining the quality of stored articles, and a simple type of non-return rubber sheet valve that can exhibit the quality maintaining function of stored articles for a long period of time. About bags.

A storage bag used for storing articles and sucking and degassing the internal air or forcibly replacing the air with an inert gas to store the articles for a required period of time is known from Patent Document 2 and the like. Further, a check valve to be mounted on this type of storage bag is disclosed in, for example, Patent Document 1.

概要 The outline configuration of the packaging bag shown in Patent Document 2 is as follows. It consists of a flat bag made of a synthetic resin film and a check valve vent pipe inserted between the opposing films on the adhesive edge of the bag body and communicating inside and outside the bag. The check valve vent pipe has two rectangular It is a flat cylindrical body formed by laminating synthetic resin films, and has a first film valve body and a second film valve body arranged side by side in the cylindrical body.

On the other hand, the check valve disclosed in Patent Literature 1 has a flat ventilation pipe in which two films are stacked and both side edges are adhered to each other. The first film valve body having both sides adhered to the adhesive edge of the ventilation pipe and the front edge being a free end, and the rear edge being the entire inner surface width of the other film of the ventilation pipe, and both sides being the adhesive edge of the ventilation pipe. This is a non-return film valve having a structure in which second film valve elements that are adhered and whose front edges are free ends are arranged such that their rear edges are spaced apart in the direction of the ventilation flow path.

The conventional non-return film valve is an independent flat cylindrical single member that is separate from the packaging bag to be attached. Even though it is a simple structure made of film, it contains two film valve elements. In addition, since each valve element has a complicated structure in which three of the four peripheral edges are bonded to the inner wall of the ventilation pipe, there is a problem in terms of economical efficiency as a general-purpose product in terms of increasing manufacturing costs.

When the check film valve (check valve vent pipe) is to be attached to a packaging bag, the check valve is attached to the flat bag made of synthetic resin film by a bonding means by being overlapped between the edges of the bag. Then, it is necessary to fix the side in which the two film valve elements are built into the flat bag body and the other side to the outside so as to protrude outward. There is no disadvantage.
Japanese Utility Model Publication No. 62-85770 (page 1, FIG. 1-2) Japanese Utility Model Laid-Open No. 5-18275 (page 1, FIG. 1-2)

In view of the fact that conventional check film valves and packaging bags have a complicated structure, and there is an economic disadvantage that costs are high due to the time required for bag preparation, the present invention has further improved the check valve. An object of the present invention is to achieve simplification of the structure, simplification and simplification of the mounting operation, and reduction of the cost of the storage bag.

In order to solve the above problems, the present invention provides, as a first means, a check valve provided integrally with a storage bag 1 for maintaining the quality of stored articles, wherein a gas barrier bag 3 of the storage bag 1 is provided. A sheet piece 4 forming a part thereof, and a rubber sheet small piece formed at a free end 9 where a part of the periphery is separated from the sheet piece 4 by partially overlapping the periphery with the sheet piece 4. A small hole 8 is formed in the center of the sheet small piece 4, and a radial hole is formed between the sheet small piece 4 and the small rubber sheet 7 from the small hole 8 to the free end 9. At least two flat air passages 11, 11 are formed, and the small thin rubber sheet 7 closes the small holes 8 and the air passages 11, 11 in a normal state and opens in an exhaust state. Functions as a check valve The configuration of the stop rubber sheet valve and main features.

The present invention also provides a storage bag 1 for maintaining the quality of a stored article having an opening 5 for storing an article at an end thereof which can be opened and closed by a sealing means 6 such as a clamp as a second means. A non-return rubber sheet valve 2 is provided integrally with the bag body 3 near the opening 5, and the non-return rubber sheet valve 2 is a small sheet piece that is a part of the bag body 3 having gas barrier properties. And a rubber sheet small piece 7 which is formed on a free end 9 in which a part of the peripheral part is separated from the sheet small piece 4 by partially overlapping the peripheral part with the sheet small piece 4, A small hole 8 is formed in the center of the sheet piece 4, while at least a radially extending portion from the small hole 8 to the free end 9 extends between the sheet piece 4 and the small rubber sheet piece 7. Two flat ventilation paths 11, 11 are formed, A storage bag with a non-return rubber sheet valve that functions as a check valve that closes the small hole 8 and the ventilation passages 11 and 11 at normal times and opens at the time of exhaustion. Is also a key feature.

The non-return rubber sheet valve of the present invention is composed of a small sheet piece that forms a part of a gas barrier bag in a storage bag and a small thin rubber sheet piece that overlaps with the sheet piece and partially adheres the peripheral edges to each other. Therefore, a check valve can be manufactured simply by covering a small piece of rubber sheet having a size of several centimeters with a small hole at an appropriate portion of the bag body and bonding it together. The check valve can be easily made by the work, and the versatility is excellent because the installation place is optional and the cost is low, and the utility value is high. In addition, based on the inherent elasticity and elasticity of the rubber sheet, it is possible to reliably and stably exert the gas backflow suppression effect over a relatively long period despite the simple structure of a flat plate. it can.

In addition, the storage bag with a non-return rubber sheet valve of the present invention can easily be provided with a non-return rubber sheet valve at an arbitrary position, and the layout is easy. It only needs to be stuck to the body, it fits compactly without any protrusions, does not cause any obstacles in side-by-side, stacking, etc., and is easy to bag and store. Furthermore, it has a structure suitable for mass production and is low-cost, and it is very easy to repair and replace the check rubber sheet valve, and it is extremely excellent as a general-purpose product.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the attached drawings based on a rough brown storage bag, which is a representative example of various types of storage bags with a non-return rubber sheet valve. I do.
FIG. 1 is a schematic external view of a storage bag according to an embodiment of the present invention, FIG. 2 (a) is an enlarged plan view of a check rubber sheet valve in FIG. 1, and FIG. 2 (b) is A in FIG. It is sectional drawing which expanded and showed the thickness direction along the -A arrow line.

The storage bag 1 for storing crude tea is made of thin paper for bag making whose inner surface is coated with an aluminum film, and is provided with a bottom 3a, a peripheral body 3b, and an opening 5 opened at the top. The bag 3 is a storage bag for tea leaves having a gas barrier property as a whole, and has a size of, for example, 500 mm in width, 330 mm in depth, and 450 mm in height, and can be used repeatedly.

In this storage bag 1, approximately 20 kg of fresh tea immediately after being picked is stored in the bag, and the opening 5 is opened and closed by a sealing means 6 such as a clamp tool. It is kept in a state where it is forcibly replaced with carbon CO ₂ and temporarily stored in a storage place such as a warehouse. In addition, as the sealing means 6 for sealing the opening 5 so that it can be opened and closed, a simple sealing method which is usually performed such as a method in which an opening end is rounded into several turns and locked with an adhesive tape is used in addition to a clamp tool. It is possible to

保存 In the storage bag 1, as shown in FIG. 1, a non-return rubber sheet valve 2 is provided integrally with the bag 3 near the opening 5. In this case, the place where the non-return rubber sheet valve 2 is disposed is a state in which a predetermined amount of crude tea is stored and the opening 5 is sealed. The locations shown in FIG.

The structure of the non-return rubber seat valve 2 will be described with reference to FIG. 2 as well. A rubber sheet small thin piece 7 of the same shape to be overlapped is provided as a required member, and a thin rubber sheet small thin piece 7 having an appropriate thickness in the range of 0.1 to 0.5 mm is attached to the sheet small piece 4 at a peripheral portion thereof. Are partially adhered to each other so as to form a free end 9 that is free from the sheet piece 4 to form a two-layer plate-like sheet valve body having flexibility.

The above-mentioned check rubber sheet valve 2 is provided with a small hole 8 at the center of the small sheet piece 4, and between the small sheet piece 4 and the small thin rubber sheet 7 through the small hole 8 through the free end. Two flat air passages 11, 11 extending radially to the left and right over 9 are formed. In this case, the small hole 8 is preferably a circular hole having a diameter of several mm, for example, φ7 mm. On the other hand, the ventilation paths 11, 11 have long sides based on the rectangular rubber sheet small thin piece 7. A suitable example is a flat passage extending in a straight line in the radial direction and crossing the small hole 8 at a central portion extending between the short sides which are parallel to and opposed to each other.

In FIG. 2 (a), the hatched portions are the bonding portions 10 formed by partially bonding the small sheet pieces 4 and the small rubber sheet pieces 7 to each other at the peripheral edges. Are bonded together by a bonding means such as bonding with a double-sided adhesive thin film 12 or bonding with an adhesive.

By partially bonding the peripheral portion in this way, the free end 9 formed in a part of the peripheral portion of the rubber sheet small piece 7 so as to be separated from the sheet small piece 4 can naturally be the air passage 11. , 11 are formed as two flat ventilation passages 11, 11 extending radially from the small holes 8 to the free end 9, whereby the rubber sheet small flakes 7 are formed. The deformation recovery operation based on the inherent elasticity and elasticity acts to close the small holes 8 and the air passages 11 and 11 at normal times and to open them at the time of exhaustion, so that the gas flows in one direction. Thus, it functions as a check valve body that can be regulated at a time.

By the way, in terms of providing a check valve element that exerts a more effective check action against gas flow, the diameter D of the small hole 8 and the length of the ventilation path 11 are determined based on the internal / external pressure difference condition of the storage bag 1. A certain correlation condition is naturally taken into account between L and width (opening width of the free end 9) C and thickness t of the rubber sheet small flakes 7. For example, regarding CO ₂ gas, the barrier property is not considered. Experiments have confirmed that good results are obtained in the order of 0.5 mm> 0.2 mm> 0.1 mm for the thickness t of the small rubber sheet piece 7. On the other hand, the relationship between the diameter D of the small hole 8, the length L and the width C of the ventilation path 11 is as follows in the case of the rubber sheet small flake 7 having a thickness of 0.2 mm, under conditions of C ≒ 1.5D and L ≦ 8D. It was found that the gas flow was improved, and the gas flow was improved under the conditions of C ≒ 1.8D and L ≦ 9D in the case of the small rubber sheet 7 having a thickness of 0.5 mm.

An embodiment of a storage example in which the storage bag according to the embodiment of the present invention described above is actually used for storing crude tea will be described below.
A tea leaf storage bag formed as a vertical bag having a gas barrier property with a width of 500 mm, a depth of 330 mm, and a height of 450 mm using thin paper for bag making in which an inner surface is coated with an aluminum film as a material. Used as material for experiments. As shown in FIG. 1, this storage bag is provided with a non-return rubber sheet valve 2 shown in FIG. 2 at the top (a position 410 mm above the bottom 3a) of the bag. As the seat valve 2, a rubber sheet small thin piece 7 having a length of 43 mm, a width of 60 mm and a thickness of 0.5 mm is used. A circular small hole 8 having a diameter of 7 mm is formed in the center of the small sheet piece 4. The air passages 11 are formed to have a width of 13 mm and a length (total length) of 60 mm over the free end 9 of the air passage.

After placing a bag for exclusive use of air permeable dry ice containing 350 g of dry ice particles in the bottom of the empty storage bag for tea leaves having the above configuration, 20 kg (full amount) of crude tea is placed thereon. Then, the opening 5 is hermetically sealed with a clamp tool as a sealing means 6 and stored in a warehouse. In this state, the check valve effect by the check rubber sheet valve 2 is checked for 7 days. Tested over time. The results are as shown in Table 1 below.

The above tests were conducted at the points a, 3, 5 and 7 on the day of the bagging, and at points 1 day to 7 days after the top of the bag and at the top of the bag (from the bottom 3a). 360mm above the point) b, bag from the middle edge part (bottom 3a of 205mm upper point) c, O ₂ content in the atmosphere in four places in the bag bottom portion (point from the bottom 3a 50 mm above the) d and CO _{2 The} content was measured.

Over immediately after bagging time to sublimation of the dry ice particles progresses, the CO ₂ gas from the side of the bottom by the increase and both the influence of difference in specific gravity between the air and CO ₂ of the bag inner pressure is gradually increased at the same time, A corresponding amount of air is discharged from the check rubber sheet valve 2. The phenomenon was sufficiently confirmed by a small passing sound generated when air slightly flowed through the ventilation passages 11 of the check rubber sheet valve 2. Thereafter, despite the daily progress, the CO ₂ content was stable at the 94% level at the four measurement points (a, b, c, d), and therefore, the non-return rubber seat valve 2 was effectively non-returned. It has a valve effect, which guarantees that the freshness and quality of the crude tea will be maintained as expected.

FIG. 3 is an enlarged plan view of a check rubber seat valve according to another embodiment of the present invention. In this figure, the same reference numerals are given to members corresponding and corresponding to the check rubber sheet valve shown in FIG.
The check rubber sheet valve 2 shown in FIG. 3 is provided with a small hole 8 at the center of the small sheet piece 4. The four flat air passages 11 to 11 extending radially in all directions over each free end 9 are formed. In this case, each free end 9 is located at the center of each corresponding side of the rubber sheet small flake 7, and its width, that is, the air passage width C is determined with respect to the small hole 8 diameter D and the air passage length L. It is preferable to set so as to satisfy the condition of D <C ≦ (L / 3).

In FIG. 3, a portion where a parallel horizontal line is given is a bonded portion 10 formed by partially bonding the small sheet piece 4 and the small rubber sheet piece 7 to each other at their peripheral edges. It is formed at a place where it is integrally adhered by bonding with an adhesive thin film 12. This check rubber sheet valve 2 is characterized in that four flat ventilation paths 11 to 11 extending radially in four directions are formed, so that the gas inside the bag can be discharged smoothly with a small resistance. There is.

As described above, the two embodiments are described in detail. However, the check rubber sheet valve 2 according to the present invention is not limited to the configuration of both embodiments, and the sheet piece 4 and the rubber sheet small thin piece 7 may be circular in addition to square. The shape of the small hole 8 may be a square hole instead of a circle. Further, the flat air passages 11 may be two or more air passages 11 extending radially from the small hole 8 to the free end 9.

The non-return rubber sheet valve and the storage bag with the non-return rubber sheet valve according to the present invention have an atmosphere different from air, such as for storing the above-mentioned crude tea, for storing fruits and cereals, and for storing rust-preventive equipment parts. It can also be applied to bags for various uses that need to be held.

1 is a schematic external view of a storage bag according to an embodiment of the present invention. (A) is an enlarged plan view of the check rubber sheet valve in FIG. 1, and (B) is a cross-sectional view showing an enlarged thickness direction along the line AA in FIG. FIG. 4 is an enlarged plan view of a check rubber sheet valve according to another embodiment of the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 ... Preservation bag 2 ... Non-return rubber sheet valve 3 ... Bag body 3a ... Bottom part 3b ... Peripheral trunk part 4 ... Sheet small piece 5 ... Opening 6 ... Sealing means 7 ... Small small piece of rubber sheet 8 ... Small hole 9 ... Free end 10 ... Lamination Part 11: air passage 12: double-sided adhesive thin film

Claims (2)

A non-return valve integrally provided in a storage bag (1) for maintaining the quality of stored articles, wherein the sheet piece (4) forms a part of a gas barrier bag (3) in the storage bag (1). And a small piece of rubber sheet (partly formed at the free end (9) where the peripheral part is partially released from the sheet small piece (4) by partially overlapping the peripheral part with the sheet small piece (4). 7), wherein a small hole (8) is perforated in the center of the sheet small piece (4), and the small hole (8) is provided between the sheet small piece (4) and the rubber sheet small thin piece (7). At least two flat air passages (11), (11) extending radially from 8) to the free end (9) are formed, and the rubber sheet small flakes (7) are formed with small holes (8). And check that the ventilation paths (11) and (11) are closed during normal operation and opened during exhaust. Check rubber sheet valve, characterized in that functions as a body. A storage bag (1) for maintaining the quality of stored articles having an opening (5) at the end for storing articles that can be opened and closed by a sealing means (6) such as a clamp tool. The bag (3) in the vicinity of (5) is integrally provided with a check rubber sheet valve (2), and the check rubber sheet valve (2) is provided with the gas barrier property of the bag (3). A part of the sheet piece (4) and a free end (9) that overlaps the sheet piece (4) and partially adheres the peripheral edges to each other so that a part of the peripheral edge is separated from the sheet piece (4) A small hole (8) is formed in the center of the sheet small piece (4), while the sheet small piece (4) and the rubber sheet small small piece (7) are formed. 7) at least two flats extending radially over the small hole (8) or the end (9) Ventilation passages (11) and (11) are formed, and the small thin sheet (7) of the rubber sheet closes the small holes (8) and the ventilation passages (11) and (11) in a normal state and exhausts air. Is a storage bag with a check rubber sheet valve, which functions as a check valve body to be opened.

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