JPH1077110A - Open freighting storage method for article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent stir up, turn up, separation, etc., of a sheet due to wind and rain, and improve weight reduction of a heavy object, space saving of a storage site and workability, by covering a surface of an open freighted article with a waterproof sheet, from its top, covering with a gas permeable sheet. SOLUTION: A surface of open freighted article 6 is covered with a waterproof sheet 7, from its top, when covering with a gas permeable sheet 8, the waterproof sheet 7 and the gas permeable sheet 8 are fixed by a connection member 11 burying a heavy object 10, to effectively prevent stir up, turn up, separation, etc., of the sheet. A mechanism of acting effect, obtained by combination of the waterproof sheet 7 and the gas permeable sheet 8, is not sufficiently clear. When wind passes through between the waterproof sheet 7 and the gas permeable sheet 8, a wind speed is different between a side (downward) of the waterproof sheet 7 of the gas permeable sheet 8 and an opposite side (upward) thereof, by reaction of wind passing through between the waterproof sheet 7 and the gas permeable sheet 8, it is imagined that acting of force retaining downward the waterproof sheet 7 may be a cause.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of storing articles by laying a sheet on articles stacked outdoors.

[0002]

2. Description of the Related Art Conventionally, when articles such as powders and granules and packaged articles are piled up and stored (stored) outdoors for a short or long period of time, the articles are scattered, spilled or deteriorated in order to protect the articles from the weather. In general, in order to avoid the collapse of the load, the articles are stored in a manner that a waterproof sheet is hung on the piled articles. For example, coal, oil coke, iron ore, wood chips, earth and sand, etc., are piled up in piles in roses, and when stored with a waterproof sheet, the waterproof sheet is blown by the wind,
Not only can the powder and granules not be protected from wind and rain due to peeling, but also a large amount of powder and granules are scattered and flowed out by the wind and rain, and then there is a drawback that it is difficult to scoop.

[0003] These drawbacks are that a rope is hung on a sheet and a heavy object such as a sand bag or old tire is tied and fixed to the middle or end of the rope. (See FIG. 2, FIG. 2 is a schematic partial cross-sectional side view), 1 is a powdered granular material, 2 is a waterproof sheet, 3 is a net, Can be solved to some extent with old tires and 5 with sand bags). However, in these methods, in order to prevent the sheet from being swung, rolled or peeled, a large number of heavy objects are transported to a pile of powder and granular material, and a large number of ropes and nets are used on slopes having unstable feet. It is necessary to attach heavy objects, which requires not only a large number of heavy objects but also an increased number of workers. In addition, as the size of the piles increases, the thickness and weight of the ropes and nets increase, so that there is a problem that not only the labor involved in attaching and detaching but also the workability is extremely poor. In addition, since it cannot be stacked too high in terms of workability, a large storage area is required for the storage area, and storage efficiency is low.

[0004] There is also a method in which only a mesh sheet is covered on a pile of piles. The mesh sheet is easier to handle because it is lighter than the waterproof sheet. However, since the pile collapses due to rainfall and the sheet is involved, it is not possible to expect a sufficient effect on rainfall. In addition, the same problem as in the case where the waterproof sheet is put on the mesh occurs due to the clogging of the granular material into the mesh.

Japanese Utility Model Publication No. Hei 5-33452 discloses that instead of attaching heavy objects such as sand bags and old tires to ropes, in order to prevent displacement and breakage due to the invasion of wind and to improve workability. A covering sheet is formed in which a bag for storing liquid is formed substantially all around the peripheral edge and at the center of the sheet so that liquid can be taken in and out from a liquid inlet / outlet, and the liquid is used as a weight. This method not only increases the cost of producing the sheet because it is necessary to form a liquid storage bag for weight around the entire periphery of the sheet, but also the bag is easily damaged by wind and rain or repeated use, and the liquid is If the sheet leaks, the sheet may be swung, rolled up, peeled off, and the like, causing damage to the stacked articles.

Japanese Patent Application Laid-Open No. Sho 56-48311 discloses that
There is a proposal for an outdoor storage yard having a barrier erected around the storage area and a mesh member installed in a posture covering the storage area above the storage area. This method not only has to build a barrier higher than the pile of articles piled up around the storage area, but the low barrier requires a storage area with a larger area, and uses a mesh member. Therefore, there is the same problem as when the mesh sheet is used alone. In addition, Japanese Patent Publication No. 61-16682
JP, JP-A-61-111209, JP-A-61-111209
JP-A-140406 and the like disclose a method of directly coating a surface of a sediment with a water-absorbing polymer, a paint, a synthetic resin emulsion or the like. However, these methods use a coating agent and are costly and practical. However, there is a drawback that the method cannot be applied to the storage of packaged goods in the open stack.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks that occur when a sheet is placed on a product such as a powder or granule or a packaged product outdoors and stored for a short or long time. In addition, the present invention provides a method of blowing a sheet by wind and rain,
It does not cause roll-up or peeling, does not require a large number of heavy objects such as sand bags and old tires, can reduce the area of the storage space, has good workability, and can store and store goods easily and easily. It is an object to provide a method.

[0008]

Means for Solving the Problems The present inventor has conducted intensive studies on a method of storing powders and granules and packages outdoors to solve the above-mentioned problems. The present inventors have found that the problem can be solved by the combination of the present invention and have led to the present invention. The present invention relates to a method of storing articles by laying a sheet on the articles piled outdoors, wherein the surface of the piled articles is covered with a waterproof sheet, and then covered with a breathable sheet. It relates to the storage method.

In the present invention, the articles to be piled up outdoors include powders and granules such as (oil) coke, coal,
Minerals such as earth and sand, limestone, blast furnace slag, gypsum, clay, etc., metal ores such as bauxite, copper ore, iron ore,
Organic substances such as wood chips, combustion ash, powdery and granular materials such as industrial waste such as sludge, and packaging products such as fertilizer, synthetic resin pellets, the above-mentioned powdery and granular materials, equipment parts, etc. are made of synthetic resin bags, paper bags, cardboard boxes. And the like stored in the product.
In general, when the piled articles are loose powders, the piled articles are piled directly on the ground by a shovel, a bulldozer, a crane, or the like or a sheet is piled on the ground. In the case of powder or granules, heavy materials such as old tires and earth and sand bags, which are provided with connecting members such as strings and wires at predetermined intervals at positions corresponding to the upper part (top part) and / or the inclined part of the mountainous pile during pile-up. After embedding and laying, and covering with a waterproof sheet and a breathable sheet, the waterproof sheet and / or the breathable sheet,
For example, when the sheet is fixed to the eyelet of the sheet by a connecting member such as a string or a wire through a connecting member such as a string or a wire, the sheet can be more effectively prevented from being swung, turned up, and peeled off. In the case where the article is a packaged product, a heavy article is piled up on the pile, and the piled up is carried out by using a mechanical device such as a forklift, a crane, or the like, and directly piled up on a sheet or a sheet or directly on the ground.

As the waterproof sheet, for example, a waterproof sheet such as a sheet of rubber or synthetic resin film, a sheet obtained by combining a reinforcing material such as a string, a net or a woven cloth with an adhesive, thermocompression bonding or the like, or a leather cloth sheet is used. Sheet having the same is used. A reflective material such as aluminum may be deposited on the surface of the waterproof sheet. When a sheet having a reflective material is used, the effect of protecting the stored articles from sunlight, heat, and the like increases in addition to the waterproof effect. The size of the waterproof sheet is not particularly limited,
It is common to use a plurality of waterproof sheets having eyelets at appropriate intervals on the periphery according to the size of the field pile. When the thickness of the waterproof sheet is too large, the weight increases and the work for hanging the sheet is difficult, and when the thickness is too thin, the strength is weakened.
Those having a thickness of from 00 to 600 μm are preferably used. The work of laying the sheets on the piled-up articles may be performed by using a mechanical device or manually.

In the present invention, it is possible to cover the piled articles with a waterproof sheet and cover them with a breathable sheet from above without using many heavy objects such as sand bags and old tires. It is important for preventing the sheet from being swirled, turned up, and peeled off by wind and rain. As the air permeable sheet, 0.1.
A mesh (opening) or pore size of 5 to 5 mm, preferably 1 to 3 mm is suitable. If the mesh or pore size is too large, the effect of the air-permeable sheet is not sufficient, and if it is too small, there is no great difference from the case where the waterproof sheet is used alone. The mesh or hole is not particularly limited, such as a square shape, a diamond shape, and an (elliptical) circular shape.
The breathable sheet may be a sheet in which vegetable fibers such as synthetic resin porous film and hemp are woven in a mesh shape. However, the mesh sheet made of synthetic resin fibers is lightweight, resistant to water dirt, easy to handle, and has excellent durability. Is preferred. Examples of the mesh sheet of synthetic resin fibers include mesh sheets woven with fibers (including strings and tapes) of a thermoplastic resin such as polyethylene, polypropylene, polyamide, polyester, polyacrylonitrile, and polyvinyl chloride. . Particularly, a mesh sheet made of a hydrophobic thermoplastic resin fiber such as polypropylene is preferable because it has a property of repelling water. The woven structure of the mesh sheet is not particularly limited as long as it has a predetermined mesh, such as plain weave, oblique weave, satin weave, and modified weaves thereof.

[0012] The thickness of the breathable sheet is selected from workability, lightness,
100 to 1500 μm, preferably 200 to
Those having a thickness of 600 μm are preferably used. Further, the size of the breathable sheet is not particularly limited, but it is common to use a plurality of sheets by joining them according to the scale of the pile. For example, when one permeable sheet is 15mx15m, use a permeable sheet having an eyelet at an appropriate interval on a peripheral edge, and connect the other eyelet with a string through a string through the eyelet. use. The breathable sheet is lightweight and easy to attach and detach. Even if a large number of heavy objects are not attached to the inclined surface, or attached to a rope, a net, a waterproof sheet, or the like, it is possible to prevent the sheet from being swirled, turned up, and peeled off by wind and rain. In addition, since it is not necessary to attach or remove a heavy object to or from the inclined surface, a high pile is possible, and more articles can be stored in a limited storage place.

In the present invention, the mechanism of the effect provided by the combination of the waterproof sheet and the breathable sheet is not sufficiently clear, but when the wind passes between the waterproof sheet and the breathable sheet, the waterproofing of the breathable sheet is prevented. It is presumed that the wind speed changes between the sheet side (downward) and the opposite side (upper side), and the reaction of the wind passing between the waterproof sheet and the breathable sheet exerts a force to hold down the waterproof sheet.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic partial cross-sectional side view of a method for storing articles in a pile according to the present invention. In FIG. 1, 6 is an unstacked article such as a granular material or a package, 7 is a waterproof sheet, 8 is a breathable sheet, 9 and 10 are heavy objects such as old tires, 11
Is a connecting member such as a string or a wire. The gist of the present invention is to cover the surface of the stacked articles 6 with the waterproof sheet 7 and to cover the surface with the breathable sheet 8 from above. When the waterproof sheet 7 and the breathable sheet 8 are fixed by the connecting member 11 in which the heavy object 10 is embedded, the sheet can be more effectively prevented from being swung, turned up, and peeled off.

[0015]

【Example】

Example 1 Oil coke was placed at a lower width of 50 m, a length of 120 m, and a height of 1
2 m, piled up in a mountain-like shape (trapezoidal shape) with an upper width of 22 m, and connected with a synthetic resin waterproof sheet containing a reinforcing fiber having an eyelet around the periphery having a width of 20 m, a length of 20 m, and a thickness of about 500 μm. Cover the pile of oil coke, and from above, mesh 1mm, width 20m, length 30m, thickness about 300
Connect and cover a mesh-like sheet of polypropylene fibers with eyelets on the periphery of μm, and form a hill (trapezoid)
10 on the mesh sheet around the bottom and top of the
Old tires were attached at intervals of m. There is no mounting of old tires on the inclined surface, and the mesh sheet is lightweight (1
20 g / m ² ), the workability was extremely good. The effect of wind and rain was observed at five locations in the same manner as above, but 6
Even after a lapse of months, none of the piles were swirled or peeled off due to the wind and rain. Also, compared to the method of putting a net with a string on the sheet and tying old tires to each part and fixing it, workability,
Not only the work efficiency was improved, but also the number of old tires attached could be reduced to 1/3, and the amount of piles in the same area could be doubled.

[0016]

According to the present invention, when stacking articles outdoors, the sheets are not swirled by wind and rain, turned, peeled off, etc., and a large number of heavy objects such as sand bags and old tires are not required.
The storage area can be reduced, workability is good, and storage / storage management can be facilitated.

[Brief description of the drawings]

FIG. 1 is a schematic partial cross-sectional side view of a method for storing articles in an open stack according to the present invention.

FIG. 2 is a schematic partial cross-sectional side view of a conventional open storage method.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 Field pile 2 Waterproof sheet 3 Net 4 Old tire 5 Sand bag 6 Field pile article 7 Waterproof sheet 8 Breathable sheet 9 Heavy object 10 Heavy object 11 Connecting member

Claims (6)

[Claims] 1. A method for storing articles by laying a sheet on an article piled outdoors, wherein the surface of the piled articles is covered with a waterproof sheet, and then covered with a breathable sheet. Open storage method. 2. The method according to claim 1, wherein the breathable sheet is a mesh sheet having a mesh of 0.5 to 5 mm. 3. The method according to claim 1, wherein the air-permeable sheet is a mesh sheet of synthetic resin fibers having a mesh of 0.5 to 5 mm. 4. The method according to claim 1, wherein the article is a granular material or a packaged article. 5. A method of storing articles by laying a sheet on the articles piled outdoors, covering the surface of the piled articles with a waterproof sheet, and having a mesh of 0.5 to 5 mm and a thickness of 100 to 1500 μm from above. A method of storing articles in an open stack, wherein the articles are covered with a mesh sheet of hydrophobic thermoplastic resin fibers. 6. A method for storing articles by laying a sheet on an article of powdery material piled up outdoors, wherein the upper part (top) and / or the slope of a pile of piles of powdery material piled up during piled up. Embed a heavy object with a connecting member at a position corresponding to the part, place it, and after stacking it, cover the surface of the article with a waterproof sheet,
0.5 to 5 mm mesh, 100 to 1500 thickness
A method for storing articles in an open stack, comprising covering with a mesh sheet of synthetic resin fiber of μm and fixing a waterproof sheet and / or a mesh sheet with the connecting member.