JP3084807U - Absorbent sandbag - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To eliminate the displacement of the water-absorbing polymer divided into a plurality of parts and to individually form the expanded water-absorbing polymer, so that the water-absorbing polymer after the expanded gelation is not biased and easy to handle. Provide a water-absorbing sandbag excellent in stability even when stacked. SOLUTION: An inner bag 2 is divided into a plurality of bag portions 2a, and a water-soluble small bag 3 packed with a water-absorbing polymer in an amount filling the bag portion by water absorption is fixed at a fixed position in each bag portion, The inner bag 2 is arranged inside the outer bag 1 and the periphery of both bags is stitched together.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a water-absorbing sandbag for preventing an emergency water disaster using a water-absorbing polymer that swells to form a gel by absorbing water and increases its weight.

[0002]

[Prior art]

 Conventionally, sandbags filled with soil and sand are piled up to block water as an emergency countermeasure against running water, inflow and inundation prevention due to heavy rainfall, water disasters, etc.

[0003] However, in order to store sandbags packed with earth and sand in advance in case of a water disaster or the like, which will strike without notice, a large storage space must be secured. It takes a lot of work to make a large number of packed sandbags and to transport them to the flood disaster site.

[0004] In order to solve the problems of the sandbags packed with soil and sand, a water-absorbing sandbag containing a water-absorbing polymer that swells and gels by water absorption and increases in weight has been proposed. Many inventions and inventions have been made as a water-absorbing sandbag.

[0005] As an example, Japanese Utility Model Registration No. 3068850 discloses that a bag having a multi-layered structure formed of sheets having any of the properties of water absorption and water permeability has an amount of water filled into the bag by water absorption. A configuration in which a water-absorbing polymer is accommodated is disclosed.In this embodiment, a unit amount of a water-absorbing polymer is accommodated in a bag only in a necessary number according to the size of the bag. I have.

When the water-absorbing sandbag is immersed in water at the place of use, the water-absorbing polymer absorbs water to expand and gel, the bag expands and the weight increases to complete the sandbag.

[0007]

[Problems to be solved by the invention]

 However, in the case of the sandbag having the above configuration, before use, the volume occupied by the entire amount of the water-absorbing polymer is extremely small compared to the internal volume of the bag, so that the water-absorbing polymer divided into a plurality of pieces can easily be placed in the bag. If it is used as it is, the gelation rate when water is absorbed is reduced, or the one-sided water-absorbing polymer is swollen and gelled in one place in the bag to form a lump. However, the shape of the sandbag after the gelation is deteriorated, and it becomes difficult to perform the work of stacking.

In addition, when the water-absorbing polymer that has been swollen and gelled in the bag is in one lump, the entire sandbag is freely deformed in response to an external pressure. Stability after stacking is also poor.

Therefore, the present invention has been made to solve the above-described problems. Before use, the position of the water-absorbing polymer divided into a plurality of pieces is eliminated so that the water-absorbing polymer can be easily handled and used. Occasionally, the water-absorbent polymer divided into small portions is individually swollen and gelled to eliminate the bias of the water-absorbent polymer after gelation and to provide a water-absorbing sandbag excellent in stability even when stacked. It is intended.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the water-absorbing sandbag according to the present invention divides an inner bag made of a nonwoven fabric made of polyethylene into a plurality of bags, and expands into a gel at a predetermined position in each bag by water absorption. A water-soluble pouch filled with a sufficient amount of the water-absorbing polymer in the bag portion, the inner bag is arranged in an outer bag made of hemp, and the edges of both bags are stitched together. I do.

[0011] According to the water-absorbing sandbag of the present invention configured as described above, a plurality of bags divided into inner bags integrated with the outer bag are filled with the water-absorbing polymer, which is divided into small portions. Because the pouch is fixed in place, the water-soluble pouch does not move within the pouch before use, making it easier to handle.

In use, since the water-absorbing polymer is individually expanded and gelled and filled in each of the bags divided into the inner bag integrated with the outer bag, the gelled water-absorbing polymer is transferred between the bags. It does not move into one lump, stabilizes the shape of sandbags, and has excellent stability even when stacked.

In addition, each of the bag portions divided into inner bags is filled with the gelled water-absorbing polymer in a well-balanced and divided manner, so that each bag portion swells uniformly. A valley (space) is formed in the valley, but the outer bag integral with the inner bag covers the valley in a tensioned manner, so when the sandbags are stacked, the valley covered by the outer bag becomes higher. By inserting part of the sandbags, the sandbags can be stuck to each other flexibly and stably, and there is no gap between the stacked sandbags to improve the water stopping effect.

In the water-absorbing sandbag according to the present invention, the plurality of bags divided into inner bags are all the same size. In addition, the same water-soluble pouch filled with a water-absorbing polymer to be accommodated in these bags is also used. There is no particular restriction on fixing the water-soluble pouch inside the bag, but if a configuration is used in which one side of the water-soluble pouch is fixed at the center of the bag divided into inner bags, The handling of sandbags makes it difficult to peel off the water-soluble pouch, resulting in excellent productivity.

Although there is no particular limitation on the number of the plurality of bags divided into inner bags, generally, the bags are divided into at least two or four bags. In this case, if the outer bag and the inner bag are formed in a rectangular shape in plan view, and are configured to be foldable at least from the center in the longitudinal direction, before use, the outer bag and the inner bag are folded in two from the center. The sandbags can be folded down to reduce the bulk, making them easier to handle and convenient for storage and transportation.

[0016]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a partial cross-sectional view showing an embodiment of the present invention, in which a part of a water-absorbing sandbag is omitted, FIG. 2 is a cross-sectional view showing a state before a water-absorbing sandbag according to the present invention is used, FIG. 3 is a sectional view showing a state when the water-absorbing sandbag according to the present invention is used.

In each of the drawings, 1 is an outer bag made of hemp, 2 is an inner bag made of a nonwoven fabric made of polyethylene disposed in the outer bag 1, and 3 is fixed in a plurality of bags 2a divided into inner bags. Shows a water-soluble pouch filled with a water-absorbing polymer.

The outer bag 1 is formed in a rectangular shape when viewed in a plan view, and is made by using a natural fiber 100% of jute (hemp), specially woven, and subjected to a non-slip process. Are difficult to slip, safe and easy to stack.

The inner bag 2 is finally used by overlapping the outer bag 1 and sewing together around the edges of both bags 4 to form a double structure. In the embodiment, the bag portion 2a is divided into four bag portions 2a by vertical and horizontal stitches 5 intersecting at the center portion, and both the outer bags 1 can be folded in two in the longitudinal direction from the center portion. I have. The inner bag 2 is a commercially available nonwoven fabric obtained by successively and vertically laminating and thermally splitting high-density polyethylene film, which has been sufficiently stretch-reinforced and split into fine fibers, into split fibers. It is made using woven fabric (trade name: Nisseki Warif). This non-woven fabric is extremely thin, lightweight, has excellent air permeability and water permeability, has extremely high vertical, horizontal and diagonal strengths. It is made of polyethylene and has excellent water and chemical resistance. When the outer bag 1 is used in a double structure by being superposed on the outer bag 1, the outer bag 1 can be reinforced and sufficient durability can be obtained.

The water-soluble pouch 3, that is, the water-soluble pouch 3 packed with a water-absorbing polymer, has one side fixed to the center of the bag 2 a divided into the inner pouch 2. This bonding may be performed directly by using an adhesive or indirectly by using a double-sided adhesive tape. The water-absorbent polymer packed in a water-soluble pouch is a water-absorbent resin which is said to have the ability to absorb water tens to hundreds of times its own weight to expand and gel. A commercially available product consisting of cellulose acrylic acid / vinyl alcohol copolymer is used. In addition, the total amount of the water-absorbing polymer used for one sandbag depends on the water-absorbing capacity, but is generally about 1 to 5% by volume based on the volume of the outer bag.

In the above configuration, before the water-absorbing sandbag according to the present invention is used, as shown in FIG. 2, since the sandbag is entirely thin and has a thin shape, it can be stored or transported. In this case, the volume can be reduced by folding it in two from the center, which makes it easier to handle.

When used at the site of a water disaster, etc., when immersed in water and water is passed through the outer bag 1 and the inner bag 2, the water-soluble small bag 3 is broken in each of the bag portions 2 a divided into the inner bag 2, and water is absorbed. The water-soluble polymer absorbs water and swells to form a gel, thereby inflating the bag portion 2a, thereby forming a three-dimensional sandbag as shown in FIG. At this time, the water-absorbing polymer is expanded and gelled independently in each of the four bag portions 2a divided into the inner bag 2 integrated with the outer bag 1, so that when treated as a sandbag, the expanded gel is filled. There is no deviation of the water-absorbing polymer after the formation, and it becomes easy to handle. Further, in the outer bag 1, each bag portion 2a of the inner bag 2 swells uniformly, and a valley (space) is generated between the bulging adjacent bag portions 2a. When the sandbags are stacked, a part of the upper sandbags enters the valley covered by the outer bags 1 when the sandbags are stacked, so that the sandbags can adhere to each other flexibly. It is possible to improve the water stopping effect without any gaps between the sandbags.

[0024]

[Effect of the invention]

 As described above, according to the water-absorbing sandbag of the present invention, the water-absorbing plastic divided into a plurality of bags divided into an inner bag integrated with the outer bag only by being immersed in water at the site of use. Each bag absorbs water and swells to form a swelling gel, which inflates each bag.The outer bag stretches over each bulged bag to form a cubic sandbag. And exhibit the water stopping effect. In addition, in the case of stacking, sandbags of the upper bag are softly adhered to each other by allowing a part of the upper sandbag to enter into the valley formed between the bags when the bags of the inner bag expand in the outer bag. As a result, there is no gap between the sandbags to be stacked, and the water stopping effect can be enhanced.

The hemp outer bag made of the above-mentioned natural fiber has a property of corroding even if it is left, so it is preferable as an earth-friendly material. The inner bag made of a non-woven fabric made of polyethylene is preferably used. Since no harmful gas (dioxin) is generated after incineration, the environment will not be polluted even if the outer bag is incinerated.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a water-absorbing sandbag according to an embodiment of the present invention, in which a part of the sandbag is omitted.

FIG. 2 is a cross-sectional view showing a state before the water-absorbing sandbag according to the present invention is used.

FIG. 3 is a cross-sectional view showing a state when the water-absorbing sandbag according to the present invention is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer bag 2 Inner bag 2a Bag part 3 Water-soluble pouch 4 Seam part 5 Seam

Claims (3)

[Utility model registration claims] 1. An inner bag made of a non-woven fabric made of polyethylene is divided into a plurality of bags, and a predetermined amount of each of the bags is filled with an amount of a water-absorbent polymer which expands and gels by absorbing water and fills the bags. A water-absorbing sandbag, wherein a water-soluble small bag is fastened, the inner bag is arranged in an outer bag made of hemp, and the edges of both bags are sewn together. 2. The water-absorbing sandbag according to claim 1, wherein one side of a water-soluble pouch is fixed to a central portion of the bag portion divided into inner bags. 3. The water-absorbing device according to claim 1, wherein the outer bag and the inner bag are formed in a rectangular shape when viewed in a plan view, and are configured to be able to be folded at least from a central portion in a longitudinal direction. Sandbags.