JP2022060090A - sandbag - Google Patents

Abstract

To provide a sandbag which is light in weight and easy in installation work, resits being flowed by water and blown off by wind, when it is difficult to be prepared in advance at the time of disaster due to a sudden change in state.SOLUTION: A sandbag is composed of an outer bag 1 formed into a square cube of a linen material having water permeability, and an inner bag 2 and an iron sand bag 4 stored in the outer bag 1, in which the iron sand bag 4 is provided at the bottom of the outer bag 1 in which two sites of a side part of an upper cloth and an upper part of a side cloth of the outer bag 1 formed into the square cube are sewn and further two sites of a side part of a lower cloth and a lower part of the side cloth are sewn to form two openings, gusset parts 9 are provided on the two sides, two magictapes (R) 5 are attachably/detachably provided one by one in the two side parts, and an ultra-water absorbing resin 3 is collected in the middle of the inner bag 2.SELECTED DRAWING: Figure 3

Description

The present invention relates to a water-swellable water-absorbent resin and a sandbag that can quickly prepare for work that can maintain its shape and prevent it from being blown by the wind or washed away by water during a flood.

Conventional technology includes an outer bag having water permeability and an inner bag housed in the outer bag, and the inner bag is made of a water-soluble or water-decomposable material and has water inside. There is a sandbag containing bentonite together with the swelling resin (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2003-201709 (see the column of claims, the column of detailed description of the invention, and FIGS. 1 and 2).

Conventional sandbags are made by filling a water-permeable bag with earth and sand, which is heavy and extremely difficult to carry. Furthermore, it is necessary to fill the bag with earth and sand. The above-mentioned conventional technique solves this problem with sandbags, which have a high water supply swelling rate, do not leak contents during swelling, and can quickly prepare for work.
However, after swelling, water is absorbed by the water-swelling resin in the inner bag and is not blown by the flood water or wind, but if it can be prepared in advance, it can be washed away by water or wind. However, in the event of an actual disaster, it may be difficult to prepare in advance, and there is a need for sandbags that are lightweight, easy to install, and that are not washed away by water or blown by the wind. There is.

The first invention of the present invention capable of achieving the above object is the sandbag as described in claim 1, and is as follows.
A sandbag composed of an outer bag made of a linen material having water permeability, an inner bag housed in the outer bag, and an iron sand bag. A super-absorbent resin is inserted into the inner bag, and the iron sand bag is formed. A total of two pieces, one on each side of the outer bag, are detachably provided.

The second invention of the present invention capable of achieving the above object is the sandbag as described in claim 2, and is as follows.
In a clay bag made of a water-permeable linen material and formed into a square cube, and an inner bag and a sand iron bag housed in the outer bag, the outer bag formed on the square cube is a side portion of the upper cloth. It is sewn at two places on the upper part of the side cloth and then sewn at two places on the side of the lower cloth and the lower part of the side cloth to form two openings. One on each side of the outer bag is detachably provided at two places with removable tape, and the super-water-absorbent resin is inserted into the inner bag so as to collect in the middle.

The third invention of the present invention capable of achieving the above object is the sandbag as described in claim 3, and is as follows.
In addition to the invention according to claim 2, it is a configuration in which a bent portion is formed in the longitudinal direction of the cloth on both sides.

Since the sandbag according to the present invention has the structure as described above, it has the effects described below.
(1) Since the inner bag containing iron sand is detachably provided on the inner bottom of the linen outer bag with a removable tape or the like, water is poured into the water-swellable water-absorbent resin of the sandbag or immersed in water. Even in an emergency where it cannot be done, it will not be washed away by water or blown by the wind.
(2) Since it is formed in a square cube shape and the side cloth is bent, the state before use can be thinned, and when water is absorbed by the water-swellable water-absorbent resin and swells, the bent part rises and the sandbag itself. The shape of the sandbag is stable and almost the same shape, it is easy to handle, it is not difficult to make it the same size and shape as the conventional sandbag containing soil, and it also has a waterproof effect as a sandbag. Are better.
(3) The sandbag of the present invention before swelling does not take up storage space and can be carried more easily than the conventional sandbag, so that it is easy to prepare for installing the sandbag, and water is injected, immersed in, or soaked in the sandbag. By immersing in water from a flood, the water-absorbing resin easily swells and plays the role of the original sandbag.
(4) Since it does not take up storage space, if it is stored in a cardboard box, it will not be deteriorated by heat and ultraviolet rays, which are the characteristics of super-absorbent resin, and can be stored for a long time. In the experiment of the applicant, the results of long-term storage for 10 to 15 years were also confirmed.

It is a schematic plan view which shows the sandbag of this invention. It is a schematic normal sectional view which shows the state which water is not absorbed by the water-swelling water-absorbing resin of the sandbag of this invention. It is a schematic normal cross-sectional view which shows the state which water was absorbed by the water-swelling water-absorbing resin of the sandbag of this invention.

In a clay bag made of a water-permeable linen material and formed into a square cube, and an inner bag and a sand iron bag housed in the outer bag, the outer bag formed on the square cube is a side portion of the upper cloth. The sand iron bag is sewn on both sides of the outer bag at the bottom of the outer bag, which is sewn at two places on the upper part of the side cloth and then sewn at two places on the side of the lower cloth and the lower part of the side cloth to form two openings. It is a clay bag that is detachably provided on each side at two places with removable tape or the like, and the super-absorbent resin is inserted into the inner bag so as to collect in the middle.

Hereinafter, sandbags according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic plan view showing an embodiment of the clay sac of the present invention, FIG. 2 is a schematic regular cross-sectional view showing a state in which water is not absorbed by the water-swellable water-absorbent resin of the clay sac in the present invention, and FIG. It is a schematic normal cross-sectional view which shows the state which water was absorbed by the water-swelling water-absorbing resin of the earth sac in this invention.

As the sandbag, which is the outer bag of the present invention, a bag having water permeability and having sufficient strength to withstand a load even when the sandbags are stacked after absorbing water and swelling is used. The outer bag preferably has high water permeability. Specifically, fabrics (woven fabrics, knitted fabrics, etc.) formed to have water permeability by natural fibers such as hemp and cotton, polyolefin fibers such as vinyl chloride fiber and polyethylene, polyamide fibers and synthetic fibers such as polyester fibers. It is made of non-woven fabric). The outer bag has a so-called mesh shape having water permeability. Further, the peripheral portion where the outer bag opens is sealed by sewing with fibers, an adhesive, heat fusion, or the like. The size of the outer bag is preferably about 30 to 50 cm in width and about 40 to 70 cm in length.

The inner bag is made of a water-soluble or water-decomposable material. By providing the inner bag, it is possible to prevent the inner bag storage item 4 from leaking to the outside from the outer bag. The inner bag is preferably dissolved or decomposed by water having a temperature of 0 ° C. or higher, and when the inner bag is made of resin, the inner bag is formed in consideration of heat fusion. The sex resin preferably has a melting point of 180 ° C. or lower. Furthermore, it is desirable that the dissolution time (decomposition time) of the inner bag in water is fast, but if it is too fast, it may dissolve due to moisture absorption during storage, so it is 20 to 60 seconds when immersed in water. Those that dissolve or decompose to some extent are suitable. Further, it is preferable that the inner bag can be easily damaged by operating from the outer side of the outer bag.
That is, it is desirable that the strength is such that the inner bag portion can be damaged by an operation such as loosening or beating from the outside of the outer bag.
By doing so, in an emergency, the inner bag can be damaged, so that the sandbag can be prepared for use more quickly. Further, the inner bag may be fixed to the inner surface of the outer bag. In particular, it is preferable that the inner bag is fixed so that the position of the inner bag can be seen from the outer surface of the outer bag.
By doing so, when the inner bag is damaged from the outer surface of the outer bag as described above, the position of the inner bag can be easily confirmed and the inner bag does not move, so that the damage operation is easy.

As the material for forming the inner bag, many commercially available water-soluble films can be used. Suitable water-soluble film-forming materials include polyvinyl alcohol, polyvinyl acetate, methyl cellulose, hydroxyethyl cellulose, carboxyethyl cellulose, sodium carboxymethyl hydroxyethyl cellulose salt, polyvinylpyrrolidone, poly (alkyl) oxazoline, and polyethylene glycol, polyacrylic acid and the like. Salt, starch, gelatin, starch-based polysaccharides, etc. can be used.

Further, as the material for forming the inner bag, so-called water-decomposable paper may be used. Water-decomposable paper may be produced by making bleached pulp to which a sizing agent has not been added or a small amount of a sizing agent has been added as a main component.

The contents are stored in the inner bag. In this sandbag, the content is a water-swellable water-absorbent resin, and solid matter such as pellets, powders, and granules is used.
In addition, the water-swellable water-absorbent resin, which is the content, has the ability to absorb water tens to hundreds of times its own weight, swell and gel. Therefore, the contents of the gel-like material swelled by water injection or immersion in the sandbag or immersion in running water due to flooding, and the sandbag in a usable state can be easily formed.

Examples of the water-swellable water-absorbent resin include starch-acrylonitrile graft polymer hydrolyzate, starch-acrylic acid graft polymer, starch-styrene sulfonic acid graft polymer, starch-vinyl sulfonic acid graft polymer, and starch-acrylamide graft weight. Highly absorbent starch-based resin such as coalescence, cellulose-acrylonitrile graft polymer, cellulose-styrene sulfonic acid graft polymer, cellulose-based high water-absorbent resin such as cross-linked polymer of carboxymethyl cellulose, and other polysaccharides such as hyaluronic acid and agarose. Natural polymers such as highly water-absorbent resin, polyvinyl alcohol cross-linked polymer, polyvinyl alcohol-based highly water-absorbent resin such as PVA water-absorbing gel frozen / thawed elastomer, polyacrylic acid salt, polyacrylic acid salt crosslinked polymer, acrylic acid polymerized portion Sodium salt crosslinks, acrylate-vinyl alcohol copolymers (specifically, methyl acrylate-vinyl acetate copolymer kendies), polyacrylonitrile-based polymer kendies, hydroxyethyl methacrylate polymers (HEMA), starches. / Acrylic acid graft copolymer, Ken's product of starch / Acrylonitrile graft copolymer, Cellulose / Acrylic acid graft copolymer, Polyacrylamide and its partial hydrolyzate, etc. Acrylic high water absorption resin, maleic anhydride (Co) Polymers, vinylpyrrolidone-based polymers, other addition polymerization systems, synthetic polymers such as highly water-absorbent resins can be used.

The sandbag of the present invention has a double structure consisting of an outer bag and an inner bag, so that the contents are stored in the inner bag even if a tough but coarse fiber is used as the outer bag. Therefore, it prevents the contents from leaking out of the bag before use. Furthermore, by storing the water-swellable water-absorbent resin in the inner bag, only the inner bag containing the water-swellable water-absorbent resin is put in or fixed at the time of manufacturing the clay bag, that is, in the outer bag, and water is used. The swelling water-absorbent resin does not scatter and is extremely easy to handle.

For example, a natural hemp bag is used as the outer bag, and a bag made of water-soluble paper is used as the inner bag. A water-swellable water-absorbent resin (trade name: Aquaboy) is put in the inner bag. Put the inner bag containing things in the outer bag, and further attach the sand iron bag containing sand iron to the inner bottom cloth of the outer bag with removable tape, such as Magic (registered trademark) tape, and open the outer bag. The two parts of the part were sewn with a thread using a three-point stop (not to mention that a three-point stop or more is also acceptable) to create the clay bag of the present invention.

Here, the specific configuration will be described in detail with reference to FIGS. 1 to 3.
The sandbag of the present invention is a sandbag composed of an outer bag 1 made of a linen material having water permeability, an inner bag 2 housed in the outer bag 1, and a sand iron bag 4, and the inner bag 2 absorbs super water. A total of two sandbags 4 are detachably provided, one on each side of the outer bag 1, with the sex resin inserted.
Further, as can be understood from FIGS. 1 to 3, it is composed of an outer bag 1 formed into a square cube made of a linen material having water permeability, an inner bag 2 and a sand iron bag 4 housed in the outer bag 1. In the clay bag, the outer bag 1 formed on the square cube is sewn at two places, the side part of the upper cloth 6 and the upper part of the side cloth 8, and further sewn at two places, the side part of the lower cloth 7 and the lower part of the side cloth 8. The outer bag 1 is formed with two openings 10 and one sand iron bag 4 is provided on each side of the outer bag 1 on both sides of the outer bag 1, and the outer bag 1 is detachably provided with two detachable tapes 5. A clay bag in which the super-absorbent resin 3 is inserted so as to gather in the middle of the inner bag 2 is also conceivable.
The openings 10 formed at both ends of the outer bag 1 of the sandbag, which is housed in the outer bag 1 and is composed of the inner bag 2 into which the super-absorbent resin is inserted and the iron sand bag 4, are fixed at three points with a thread. It is something that is.

Conventional sandbags have a problem that they become round when the water-absorbent resin absorbs water and swells, or when they are filled with earth and sand, and even if the sandbags are placed side by side, a gap is created and water escapes from there. The outer bag 1 used for the outer bag 1 is provided with bent portions 9 at both ends, so that when the inner bag 2 swells, the super water-absorbent resin of the inner bag 2 absorbs water so that the outer bag 1 becomes a square cube. It spreads evenly due to the expansion pressure, the bent portions 9 at both ends are stretched, and the shape is stable in a square cubic shape and expands to substantially the same shape, so that a significant water stopping effect can be exhibited.

Further, it is effective that the side cloth 8 is formed with a bent portion 9 so that the super-water-absorbent resin 3 can be made compact when stockpiling before water absorption, so that the side cloth 8 can be easily folded.
Further, although the number of openings 10 may be one, two are provided so that the iron sand bags 4 can be easily attached to both sides of the outer bag 1 and one place at the time of storage in the preparation stage. When the iron sand bag 4 is set with the removable tape 5, the work is easy because it can be attached from both openings 10.

After using the sandbags, for example, after a flood, it is necessary to treat many of the used sandbags, but in the sandbags of the present invention, the outer bag 1 is evenly and well-balanced with cotton thread such as octopus thread. After use, the inner bag 2 can be taken out by cutting the cotton thread, and it is easy to dehydrate the swelled super-water-absorbent resin by spraying calcium chloride or the like, and as a result, the entire sandbag can be treated more easily than the conventional one. You can do it. The outer bag 1 after the inner bag 2 is taken out can be reused.

It can be used not only during floods but also during disasters such as flooding of roads due to flooding of rivers due to long rains in lowlands.

1 ... Outer bag 2 ... Inner bag 3 ... Water-swellable water-absorbent resin 4 ... Sand iron bag 5 ... Detachable tape 6 ... Upper cloth 7 ...・ ・ Lower cloth 8 ・ ・ ・ ・ Side cloth 9 ・ ・ ・ ・ Bent part 10 ・ ・ ・ ・ Opening

Claims (3)

A sandbag composed of an outer bag made of linen material having water permeability, an inner bag housed in the outer bag, and a sandbag. A super-absorbent resin is inserted into the inner bag, and the sandbag is formed. A total of two sandbags, one on each side of the outer bag, are detachably provided. In a clay bag made of a water-permeable linen material and formed into a square cube, and an inner bag and a sand iron bag housed in the outer bag, the outer bag formed on the square cube is a side portion of the upper cloth. It is sewn at two places on the upper part of the side cloth and then sewn at two places on the side of the lower cloth and the lower part of the side cloth to form two openings. A clay bag characterized in that it is detachably provided at two places on both sides of the bag with removable tape, and a super-absorbent resin is inserted into the inner bag so as to collect in the middle. The sandbag according to claim 2, wherein a bent portion is formed in the longitudinal direction of the cloth on both sides of the sandbag.

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