JP3474337B2 - Packaging bags for powdered and granular materials - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a packaging bag for a powdery substance such as cement or a granular substance such as grain, and more particularly, to the use of these substances without opening the packaging bag body. The present invention relates to a packaging bag of a powdery or granular substance which can be easily stored from the introduction port of the introduction pipe provided at the periphery and can be surely prevented from escaping from the introduction port of the introduction pipe to the outside after being once stored. .

[0002]

2. Description of the Related Art Conventionally, in order to prevent powdery or granular substances contained in a packaging bag from escaping to the outside, a check valve equipped with a filter having fine holes is mounted on the packaging bag. Some of the above have been proposed, for example, one using a check valve described in Japanese Utility Model Publication No. 6-39179, which was previously filed and published by the applicant of the present invention, is known.

[0003]

However, at the portion where the above-mentioned check valve is inserted in the packaging bag, one side is formed of the filtering film and the other side is formed of the plastic film, and the lower end is closed. Since it has a flat bag-like structure, the effect of preventing the escape of powdery or granular stored items and the effect of releasing unnecessary air in the packaging bag can be certainly achieved. In the case of storing the above-mentioned stored items, there is a problem that it is necessary to seal and close the opening after storing it from the peripheral opening of the packaging bag.

The present invention has been researched and developed with the object of solving the above-mentioned problems, and a powdery or granular substance is introduced from an inlet port above an inlet pipe of an article mounted on the peripheral edge of a packaging bag. These substances are convenient and can be easily stored in the packaging bag, and once these substances are released, unnecessary air in the packaging bag is released to the outside by pressurizing the packaging bag to release air. Also, an object of the present invention is to provide a packaging bag of powdery or granular material having a feature that it is possible to reliably prevent the contained material from escaping to the outside.

[0005]

Means for Solving the Problems As a means for solving the above problems and achieving the object, the present invention provides a packaging bag body made of a plastic film and a powdery or granular substance contained in the packaging bag body. It consists of a flat and wide plastic film introduction tube with an introduction port for the upper part, and this introduction tube is a filtration part with a fine hole on at least one side of the introduction tube in the lower part of the introduction port. And a filter surface made of a film for use, and at the lower part of the filter surface, at least one sealing piece made of a plastic film, the upper edge of which is adhesively attached to the inner surface of at least one of the introduction tubes. Both side edges of the sealing piece are adhered to both side edges of the introduction tube, and a sealing piece for sealing and closing the introduction tube by the at least one side surface of the introduction tube and at least one sealing piece. It is equipped with a downward pocket for movement, and this introduction pipe is installed in the main body of the packaging bag at the periphery of the main body of the packaging bag, and the inside and outside of the main body of the packaging bag communicate with each other only through the introduction port of the introduction pipe. The present invention provides a packaging bag of powdery or granular material constituted by the above.

Further, in the present invention, in the packaging bag of the powdery or granular material constructed as described above, a reinforcing member made of a plastic film having a large number of ventilation holes is provided on the inner surface of the filtering surface provided in the introduction pipe. , A packing bag of powdery or granular material adhered at the periphery of the filtration surface, and a plurality of sealing pieces made of plastic film are vertically adhered to the inner surface of the introduction pipe to provide a plurality of sealing piece operating pieces. Pouches of powdery or granular material with downward facing pockets, and a plurality of plastic film sealing pieces are vertically bonded to both inner surfaces of the introduction tube to form a plurality of downward facing pockets for operating the sealing pieces. Powder provided, a packaging bag of granular material, as well as a powder reinforcing member made of a plastic film with a large number of vents is part of the introduction pipe made of a plastic film,
Each of them provides a packaging bag of granular material.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 4 show a first embodiment of the present invention. As shown, the packaging bag of powdery or granular material according to the present invention comprises a packaging bag body 1 and an introducing pipe 2 for containing, for example, cement powder in the packaging bag body 1.

Thus, the packaging bag body 1 is constructed by superposing two thick and sturdy rectangular thermoplastic films F ₁ and F ₁ on top of each other to form left and right side edges a, a and lower side edges. While b is heated and adhered, and a non-adhesive portion c ₁ for inserting the introduction tube 2 described below into the packaging bag body 1 is left in a part of the upper side edge c, another upper side edge c c is formed by heating and bonding, and the packaging bag body 1 is used as a packaging bag for cement powder.

Next, the introduction pipe 2 is made of the same plastic film as the packaging bag body 1, and the packaging bag body 1 is made of the same material.
The two rectangular plastic films F ₂ and F _{2 each} having a width length of about 1/3 to 1/2 of the width of , A non-woven fabric made of a flat and wide tubular body having an inlet 3 for cement powder in the upper portion, and having a large number of fine holes on one side at the lower portion of the inlet 3. It is provided with a filtration surface 4a composed only of the filtration film 4 produced in Step 1.

The upper end edge e of the sealing piece 5 made of a plastic film is adhesively mounted on the inner surface of the introducing pipe 2 on the side of the filtering surface 4a in the lower portion of the filtering surface 4a. Moreover, both side edges of the sealing piece 5 are simultaneously adhered to the side edges d, d of the introduction tube 2 at the same time when they are adhered, and one side surface of the introduction tube 2 and the sealing piece 5 allow the main body of the packaging bag. A downward facing pocket 6 for actuating the sealing piece is formed for sealing off the inlet tube 2 when the air in 1 is released. Also,
The lower side edge of the sealing piece 5 is located above the lower end of the introduction tube 2.

The introduction tube 2 constructed as described above is inserted into the packaging bag main body 1 from the non-adhesive portion (opening) c ₁ of the upper side edge c of the packaging bag main body 1, and the upper introduction port 3 In a state where the portion is slightly projected to the outside, both outer surfaces of the introduction tube 2 are separately adhered to both inner surfaces of the non-adhesive part c ₁ of the upper side edge c of the packaging bag body 1 to the edges of the packaging bag body 1. Therefore, the packaging bag body 1 is configured to communicate with the inside and outside of the packaging bag body 1 only through the introduction port 3 of the introduction pipe 2. In addition, in the first embodiment, both sides d of the introduction pipe 2 are attached to the packaging bag body 1
It is attempted to improve the air release efficiency by adhering f to the inner surface of one of the surfaces f.

Next, the use condition of the first embodiment configured as described above will be described together with its function and effect.
When the cement powder is introduced from the introduction port 3 of the introduction pipe 2 in the state shown in (1), the introduction pipe 2 is smoothly formed and is accommodated in the packaging bag body 1 because it is formed in a wide width. At this time, since air is contained in the bag body 1 that contains the cement powder and is bulky, when the bag body 1 is pressurized to release the air, the air is released as shown in FIG. As shown by the arrow A, the air enters from the pocket 6 and the air pressure causes the sealing piece 5 to come into close contact with the inner surface of the introduction tube 2 on the side opposite to the sealing piece to close the introduction tube 2. There is no possibility that the cement powder will be released to the outside, and the air and the cement powder are between the inner surface of one side of the packaging bag body 1 and the outer surface of the introduction tube 2 on the side where the filtering surface 4a formed of the filtering surface film 4 is formed. An advantage that it is possible to reliably prevent the cement powder from being discharged to the outside by passing through the flow path 7 formed in the above direction and flowing in the direction indicated by the arrow B to reach the filtration surface 4a, and only the air passes through the filtration surface 4a. In this way, the sem DOO powder only accommodated the obtained state and without a, which can substantially reduce the cement powder bag, this effect,
When a large number of cement storage bags are stacked, the effect is naturally exerted by the weight of the cement powder storage bags themselves, the storage capacity of the warehouse can be improved, and stable stacking is possible.

FIGS. 5 and 6 show a second embodiment of the present invention. The difference from the first embodiment is that a large number of ventilation holes are formed on the inner surface of the filtering surface 4a. The only difference is that the reinforcing member 9 made of a plastic film provided with 8 ... 8 is adhered to the periphery of the filtration surface, and the other structures are the same. Therefore, the same parts as those in the first embodiment are designated by the same reference numerals.

According to the second embodiment, the function of filtering only air by the filtering surface 4a is not hindered,
Moreover, since the filtration surface 4a can be remarkably reinforced, there is an advantage that the durability as a packaging bag of this type can be improved. In addition, in the embodiment shown in FIGS. 5 and 6, an example in which the reinforcing member 9 is formed by a separate plastic film is shown, but instead of this, although not shown, the introducing pipe 2 is configured. A large number of vent holes 8 ... 8 may be provided at a location corresponding to the filtering surface 4a of the plastic film F ₂ to form the reinforcing member 9.

FIG. 7 shows a third embodiment of the present invention, which is different from the first embodiment in that two sealing pieces 5 are provided on both inner surfaces of the introduction tube 2. , 5 are alternately adhered to each other vertically, and two downward pockets 6 and 6 for operating the sealing pieces are provided in upper and lower two stages. There is no difference in other structures. Therefore, the same parts as those in the first embodiment are designated by the same reference numerals. According to this third embodiment, the operation of the first embodiment,
In addition to the effect, there is an advantage that the introduction pipe 2 can be closed by air pressure in two stages, and the air and the contained cement powder can be more reliably prevented from being released to the outside from the introduction pipe 2. Even if one of the pockets 6 is damaged, there is an advantage that the other pocket 6 can maintain the above-mentioned release preventing function.

FIG. 8 shows a fourth embodiment of the present invention. The difference from the second embodiment is that two sealing pieces 5 are provided on both inner surfaces of the introduction tube 2. , 5 are alternately adhered to each other vertically, and two downward pockets 6 and 6 for operating the sealing pieces are provided in upper and lower two stages. There is no difference in other structures. Therefore, the same parts as those in the first embodiment are designated by the same reference numerals. According to the fourth embodiment, the operation of the second embodiment,
In addition to the effect, there is an advantage that the introduction pipe 2 can be closed by air pressure in two stages, and the air and the contained cement powder can be more reliably prevented from being released to the outside from the introduction pipe 2. Even if one of the pockets 6 is damaged, there is an advantage that the other pocket 6 can maintain the above-mentioned release preventing function.

In each of the above embodiments, the packaging bag of powder cement has been described, but the substance to be contained is not limited to powder cement, and other various powdery substances, grains, and other granular substances can be packaged. It can also be used as a bag.

The main embodiments of the present invention have been described above, but the present invention is not limited to these embodiments, and the scope of the present invention can be achieved without departing from the scope of the invention. Naturally, various design changes are possible.

[0019]

According to the packaging bag for powdery or powdery substance of the present invention as set forth in claim 1, the powdery or powdery substance can be easily introduced from the inlet of the wide introduction tube. As described above, it is possible to save the trouble of closing these openings after accommodating these substances from the opening provided in a part of the packaging bag, and to ensure that only the air in the packaging bag is released without releasing the contained substance at all. Since it can be released to the outside, the bulk of the packaging bag containing the substance can be substantially reduced, the storage capacity of the warehouse can be improved, and the packaging bags can be stably stacked, and can be transported or otherwise. Easy to handle.

According to the packaging bag of the powdery or granular material of the present invention described in claims 2 and 5, in addition to the above effects,
The strength of the filtration surface can be increased, and the durability of this type of packaging bag can be improved.

According to the packaging bag of the powdery or granular material of the present invention as set forth in claims 3 and 4, in addition to the above-mentioned effects, the introduction pipe can be closed by air pressure in two stages. Further, there is an advantage that it is possible to more reliably prevent the air and the contained powdery or granular substance from being discharged from the introduction pipe to the outside, and even if one pocket is damaged, the other pocket 6 prevents the above-mentioned discharge. There is an advantage that the function can be retained.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view with a part omitted along line AA of FIG.

FIG. 3 is an explanatory diagram showing a closed state of an introduction pipe and a released state of air.

FIG. 4 is an exploded perspective view of an introduction pipe.

FIG. 5 is an enlarged vertical cross-sectional side view of a main part with a part omitted, showing a second embodiment of the present invention.

FIG. 6 is an exploded perspective view of an introduction pipe.

FIG. 7 is an enlarged vertical cross-sectional side view of a main part with a part omitted showing a third embodiment of the present invention.

FIG. 8 is an enlarged vertical cross-sectional side view of a main part with a part omitted showing a fourth embodiment of the present invention.

[Explanation of symbols]

1 packaging bag body 2 Introductory pipe 3 entrance 4 Film for filtration 4a filtration surface 5 sealing pieces 6 pockets 7 channels 8 ventilation holes 9 Reinforcement member

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B65D 30/24 B65D 33/01

Claims (5)

(57) [Claims] 1. A plastic bag main body made of plastic film, and a flat and wide plastic pipe introduction pipe having an inlet for accommodating powdery or granular substances inside the main body of the plastic bag. The introduction pipe is provided with a filtration surface made of a filtration film having fine holes on at least one side surface of the introduction pipe at a lower portion of the introduction port, and an upper end edge of the introduction pipe is provided at a lower portion of the filtration surface. Of at least one plastic film sealingly attached to the inner surface of at least one of them, and both side edges of the sealing piece are adhered to both side edges of the introduction pipe, and at least one of the introduction pipes And a at least one sealing piece to seal and block the introduction tube, and is provided with a downward pocket for operating the sealing piece. Installed in the body of the packaging bag at
A packaging bag of a powdery or granular substance, which is formed by communicating the inside and outside of the packaging bag body only through the introduction port of the introduction pipe. 2. A reinforcing member made of a plastic film, which is provided with a large number of ventilation holes, on the inner surface of the filtering surface provided in the introduction pipe,
The packaging bag for powdery or granular material according to claim 1, wherein the packaging bag is adhered at the periphery of the filtration surface. 3. A plurality of downwardly facing pockets for operating the sealing pieces are provided by vertically adhering a plurality of sealing pieces made of a plastic film to the inner surface of the introducing pipe.
The packaging bag for the powdery or granular material according to 1. 4. A plurality of plastic film sealing pieces are vertically bonded to both inner surfaces of the introducing tube to provide a plurality of downward pockets for operating the sealing pieces. A packaging bag of the powdery or granular material according to any one of the above. 5. The packaging bag for powdery or granular material according to claim 2, wherein the reinforcing member made of a plastic film having a large number of ventilation holes is constituted by a part of the introduction pipe made of the plastic film.