JP2018020833A - Sandbag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sandbag of which durability can be improved.SOLUTION: A sandbag 20 comprising a bag body 30 in which woven cloths 60 are sewn together by a sewing thread, in which the woven cloth 60 is configured from a basalt fiber. Further, the woven cloth 60 forms a cylindrical cord insertion part 32 in such a manner that a first long side part 61 is folded back along with a friction reduction sheet 80 which is located along the long side part 61. A sewn part 50 of a bottom 34 and one side part 35 of the bag body 30 are configured in such a manner that a covering cloth 70, which is a cloth different from the woven cloth 60, is sewn together with the woven cloth 60. The covering cloth 70 is so provided as to cover a margin of the woven cloth 60 which constitutes the bottom 34 and one side part 35 of the bag body 30.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a sandbag bag used, for example, in a state in which earth and sand are packed.

  Conventionally, sandbags have been used for various purposes such as civil engineering and disasters. As such sandbags, sandbags filled with sand and sand are made of a woven fabric using polyolefin fibers such as polyethylene and polypropylene (for example, Patent Document 1).

JP 2002-309538 A

  By the way, in the sandbag bag used for civil engineering applications as described in Patent Document 1, further improvement in durability is required in order to cope with various usage purposes in civil engineering applications. In particular, sandbags as civil engineering materials used as part of roads for early public awareness in the event of disaster, such as weather resistance to keep outdoors, strength to withstand vehicle traffic, flame resistance to withstand fire spread, etc. Durability is required, but in reality there are no sandbags that are satisfactory.

  This invention is made | formed in view of such a situation, The objective is to provide the sandbag which solved the said subject.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
The sandbag that solves the above problems includes a bag body in which woven fabrics are sewn together with sewing threads, and the woven fabric is composed of basalt fibers.

According to this structure, durability of a sandbag bag can be improved by using a basalt fiber.
In the sandbag, the woven fabric is preferably impregnated with a soft resin. In particular, the soft resin is preferably soft vinyl chloride.

  According to this configuration, it is possible to suppress the weave of the woven fabric and improve the sewing strength without impairing the flexibility and strength of the woven fabric constituting the bag body. In addition, by using soft vinyl chloride as a soft resin, even when used for a long period of time, the displacement of the texture of the woven fabric and its sewing strength can be maintained, and flame resistance can be imparted to the woven fabric.

In the sandbag, the sewing thread is preferably composed of polyarylate fibers.
According to this structure, durability of a sandbag bag can be improved by using a polyarylate fiber.

  In the sandbag, it is preferable that at least a part of the sewing portion where the woven fabrics are sewn together is formed by sewing a covering fabric made of basalt fibers together with the woven fabric together with the woven fabric. .

According to this structure, a sewing part can be reinforced with the covering cloth comprised by the basalt fiber.
In the sandbag, the bag body has a string passage portion through which a mouth string for drawing and narrowing the mouth portion opened to the bag body is passed, and the string passage portion includes the mouth in the string passage portion. It is preferable that a friction reducing sheet for reducing the friction of the string is provided.

  According to this configuration, the friction reducing sheet reduces the friction of the mouth strap, so that the mouth of the bag body can be easily drawn.

  According to the present invention, the durability of the sandbag bag can be improved.

The perspective view which shows one Embodiment of a sandbag bag. The perspective view when the opening part of a bag body is drawn down. The front view which shows the bag body of the state turned over. The perspective view which decomposes | disassembles and shows the bag body before sewing. Sectional drawing of the part shown by A in FIG. Sectional drawing of the part shown by B in FIG. Sectional drawing of the part shown by C in FIG. The enlarged view of the part shown by D in FIG. The top view which notched a part of mouth strap. The perspective view which shows the example of a change of a sandbag bag.

Hereinafter, an embodiment of a sandbag bag will be described with reference to the drawings.
As shown in FIG.1 and FIG.2, the sandbag 20 is provided with the bag 30 which can accommodate earth and sand etc., for example. The bag body 30 has a mouth portion 31 at an upper portion thereof, and earth and sand are accommodated in the bag body 30 through the mouth portion 31. Further, the mouth portion 31 is provided with a string passage portion 32 through which the mouth strap 40 for pulling down the mouth portion 31 is passed. The string passage portion 32 extends along the periphery of the mouth portion 31 that is the upper edge of the bag body 30, and forms a cylindrical space into which the mouth strap 40 can be inserted. Further, the string passage part 32 is provided with a string passage hole 33 for exposing the end of the mouth string 40 passing through the space from the string passage part 32. The ends exposed from each other are connected to each other to form a loop shape. Then, by pulling the mouth strap 40, the mouth portion 31 is drawn together with the string passage portion 32, and the mouth portion 31 is blocked so that earth and sand accommodated in the bag body 30 does not leak from the mouth portion 31. The

  As shown in FIG. 3, the bag body 30 has a rectangular shape when viewed from the front in an unused state in which earth and sand or the like are not accommodated. Here, the bag body 30 shown in FIG. 3 is illustrated with the bag body 30 shown in FIG. 1 turned upside down. Therefore, in the present specification, hereinafter, the surface on the side where the stored objects such as earth and sand are stored may be referred to as the inner surface of the bag body 30 and the opposite side may be referred to as the outer surface of the bag body 30. The bag body 30 having a rectangular shape in a front view has a mouth portion 31 on the side where the string passage portion 32 is provided (upper side in FIG. 2) and a side opposite to the mouth portion 31 (lower side in FIG. 2). A sewing portion 50 is provided on a certain bottom portion 34 and one side portion 35 that is a side (the right side in FIG. 2) on which a string passing hole 33 is provided in a side portion connecting the mouth portion 31 and the bottom portion 34. . The sewing part 50 is formed by sewing together a woven fabric 60 described later with a sewing thread. In addition, the sewing part 50 is not formed in the other side part 36 on the opposite side (left side in FIG. 2) to the one side part 35. In addition, the sewing thread in this embodiment is comprised with the polyarylate fiber.

  As shown in FIGS. 3 and 4, the bag body 30 is sewn mainly with a single woven fabric 60. In addition to the woven cloth 60, the bag body 30 in this embodiment includes a covering cloth 70 woven with the same fiber material as the woven cloth 60 and a friction reducing sheet 80. The woven cloth 60 before sewing is a rectangular cloth, and the first long side portion 61 and the second long side portion 62 that are long sides thereof, the first short side portion 63 and the second side that are short sides thereof. A short side portion 64 is provided. In the longitudinal direction, which is the direction in which the long sides extend, the woven fabric 60 is stitched at the short sides facing each other by being folded back by a folded portion 65 that is a central portion thereof. And the woven fabric 60 forms the side part of the bag body 30 by stitching short sides and closing. That is, the first short side portion 63 and the second short side portion 64 of the woven fabric 60 constitute one side portion 35 of the bag body 30, and the folded back portion 65 constitutes the other side portion 36 of the bag body 30. . The woven fabric 60 forms the bottom 34 of the bag 30 by sewing and closing the second long side portions 62 facing each other by the folded portion 65. That is, the second long side portion 62 of the woven fabric 60 constitutes the bottom portion 34 of the bag body 30.

  Further, the woven fabric 60 forms a tubular string passage portion 32 by folding and sewing the first long side portion 61 together with the friction reducing sheet 80 arranged along the first long side portion 61. . Here, the 1st long side part 61 is not sewn so that the 1st long side parts 61 which face each other by the folding | turning part 65 like the 2nd long side part 62 may be obstruct | occluded. Therefore, in the bag body 30 that is sewn by sewing the woven fabrics 60 together, a portion corresponding to the first long side portion 61 of the woven fabric 60 is in an open state. That is, the first long side portion 61 of the woven fabric 60 constitutes the mouth portion 31 of the bag body 30. In the sandbag bag 20 in the present embodiment, the sewing portion 50 in the bottom portion 34 and the one side portion 35 of the bag body 30 is configured by sewing a covering cloth 70 that is a cloth different from the woven cloth 60 together with the woven cloth 60. Has been. The covering cloth 70 is provided so as to cover the edge of the woven cloth 60 constituting the bottom 34 and the one side 35 of the bag body 30.

  As shown in FIG. 5, one side portion 35 of the bag body 30 is formed by sewing together in a state where the first short side portion 63 and the second short side portion 64 of the woven fabric 60 are folded back. More specifically, the first short side portion 63 and the second short side portion 64 are folded back toward the side where the respective distal ends are separated from each other. And the location shown with a broken line (two locations in this embodiment) in the state where the covering cloth 70 bent so as to cover the folded portion of the first short side portion 63 and the second short side portion 64 is applied. Are sewn together with a sewing thread along the first short side portion 63 and the second short side portion 64. The covering cloth 70 has a size capable of covering the tips of the first short side portion 63 and the second short side portion 64.

  As shown in FIG. 6, the bottom portion 34 of the bag body 30 is formed by sewing together in a state where the second long side portions 62 of the woven fabric 60 are folded together. More specifically, the second long side portions 62 facing each other are folded back toward the same side so that the respective leading ends overlap. And the place (four places in this embodiment) shown with a broken line is the 2nd long side part in the state where the covering cloth 70 bent so as to cover each folded part of the 2nd long side part 62 was applied. The sewing thread is sewn along the thread 62. The covering cloth 70 has a size that can cover the tip of the second long side portion 62.

  As shown in FIG. 7, the stringing portion 32 of the bag body 30 is formed by sewing together in a state where the first long side portion 61 of the woven fabric 60 is folded together with the friction reducing sheet 80. Specifically, in the first long side portion 61, the front end of the first long side portion 61 is folded back to the side corresponding to the inner surface of the bag body 30 (back side) while the friction reducing sheet 80 is stacked. And the cylindrical long space which makes the friction reduction sheet 80 the inner peripheral surface is formed by the folded part of the first long side part 61, and the first long side part 61 and the friction reduction sheet 80 are broken lines. The stringing portion 32 is formed by sewing a portion to be shown (one location in the present embodiment) with a sewing thread along the first long side portion 61. That is, most of the mouth strap 40 passing through the string passage portion 32 slides with the friction reducing sheet 80 when the mouth strap 40 is pulled. The friction reducing sheet 80 is made of a material whose friction coefficient with respect to the mouth strap 40 is smaller than the friction coefficient of the woven fabric 60 with respect to the mouth strap 40. Note that the friction reducing sheet 80 in the present embodiment is made of polyester or polyethylene.

  As shown in FIG. 8, the woven fabric 60 is a woven fabric woven with a plurality of warps 67 and wefts 68. In addition, the woven fabric 60 in this embodiment is configured by a plain weave in which warps 67 and wefts 68 are alternately raised and lowered. In addition, the woven fabric 60 in the present embodiment is impregnated with a soft resin. In the present embodiment, the soft resin impregnated in the woven fabric 60 is particularly preferably soft vinyl chloride (also referred to as soft vinyl chloride). And these warp 67 and weft 68 are comprised with the basalt fiber which is 1 type of inorganic fiber. The covering cloth 70 has the same configuration as the woven cloth 60. This basalt fiber is a natural fiber material produced by melting basalt at a high temperature. Basalt fiber is more weather resistant than organic fiber materials (polypropylene (PP) fiber, polyethylene (PE) fiber, polyethylene terephthalate (PET) fiber, etc.) that have been widely used as woven fabrics that make up sandbag bags. Excellent in heat resistance and heat resistance.

  In addition, the basalt fiber has a high tensile elastic modulus (Young's modulus), and has a higher tensile strength than the fiber material of organic fiber (for example, PP, PE) with respect to the tensile force applied in the longitudinal direction of the fiber. . Moreover, in this embodiment, the warp 67 and the weft 68 are comprised with the basalt roving yarn (untwisted yarn) in which the basalt fiber is not twisted. Therefore, when the woven fabric is resin-coated after weaving, the resin is easily impregnated between the basalt fibers constituting the warp 67 and the weft 68. In addition, the woven fabric 60 may be comprised with the basalt yarn (twisted yarn) of the twisted yarn structure where the basalt fiber was twisted.

  As shown in FIG. 9, the mouth strap 40 includes a core cord 41 serving as a core, a first tubular cord 42 extending so as to cover the core cord 41, and a second tubular cord 43 extending so as to cover the first tubular cord 42. And is configured in triplicate. The core string 41 is configured as a twisted string in which a plurality of yarns 44 are twisted. On the other hand, the first tubular string 42 and the second tubular string 43 are configured as a braided string in which a plurality of yarns 44 are knitted. Note that the mouth strap 40 has a triple structure in order to secure the strength necessary for drawing the mouth portion 31 and to make the thickness easy to handle. Here, since the core string 41 serving as the core of the mouth strap 40 is formed by twisting the yarn 44, compared to the first tubular cord 42 and the second tubular cord 43 configured by braiding the yarn 44, The straightness of the fibers constituting the yarn 44 is high. Moreover, the 1st cylinder string 42 and the 2nd cylinder string 43 are knitted so that several thread | yarn 44 may be tied, and it is comprised so that each thread | yarn 44 may have the intensity | strength of the grade which does not collapse apart. And since the core string 41 used as the core of the mouth strap 40 has high fiber linearity, it greatly contributes to the tensile strength in the longitudinal direction of the mouth strap 40. In addition, as for this tie 40, the thread | yarn 44 which comprises the core string 41, the 1st cylinder string 42, and the 2nd cylinder string 43 is comprised with the vinylon fiber.

Next, the operation of the sandbag 20 configured as described above will be described.
Conventionally, sandbags that are made by filling sandbags 20 with sand and the like are sometimes used in disasters. For example, when a road is depressed due to an earthquake or the like, a sandbag is sometimes spread over the depressed portion for road enlightenment. In such a case, the sandbag 20 is required to have a strength that can withstand the load of the vehicle and a tear resistance that can withstand the tearing force caused by the rotation of the tire when a large vehicle passes. In addition, when a fire or the like occurs in the vicinity, fire resistance that can withstand the heat of fire and self-extinguishing properties that are difficult to spread even if ignited are required. In addition, sandbags are sometimes loaded on trucks and carried to disaster sites. In such a case, even if the sandbag falls from the loading platform of the truck, the sandbag 20 is required to have impact resistance capable of withstanding the impact. Further, sandbags are generally stored outdoors in a state where sandbags or the like are previously packed in sandbag bags 20 in order to quickly respond to disasters. Therefore, the sandbag 20 is required to have weather resistance, heat resistance, cold resistance and the like that can withstand surrounding environments such as sunlight, rain, frost, wind, and temperature.

  Here, a woven fabric mainly made of synthetic fibers such as polypropylene (PP) and polyethylene (PE) is used for conventional sandbags. In this case, since the fibers constituting the woven fabric deteriorate due to exposure to the surrounding environment such as sunlight, rain, frost and wind, the general service life is about 3 years. However, from the above situation, there is a demand for sandbag bags that are more durable than conventional sandbag bags. On the other hand, the sandbag 20 in this embodiment comprises the bag 30 with the woven fabric 60 which consists of a basalt fiber.

  Basalt fibers are known to have many excellent properties such as strength, weather resistance, chemical resistance, heat resistance, cold resistance, and tear resistance. For example, the degree of deterioration of sunlight by ultraviolet rays is small for basalt fibers compared to synthetic fibers such as polypropylene and polyethylene. Moreover, compared with such a synthetic fiber, the basalt fiber has a high strength against the tensile force in the longitudinal direction of the fiber. In addition, the sandbag 20 in this embodiment has been evaluated for performance by a predetermined test method. For example, when the tear resistance of the sandbag 20 in the present embodiment was tested by a predetermined test method (JIS L 1096 A-1 method), measured values of 175 N in the vertical direction and 186 N in the horizontal direction were obtained. Further, when the combustibility of the sandbag 20 in this embodiment was tested by a predetermined test method (JIS L 1091 B method), the measured values were obtained that the afterflame time was 0 second and the combustion length was 3.3 cm. . Incidentally, these test results show an example, and the sandbag 20 in the present embodiment is not limited to this value.

  As described above, the basalt fiber is superior in durability as compared to polypropylene and polyethylene used in conventional sandbag bags. That is, the sandbag bag 20 made of the woven fabric 60 woven with basalt fiber exhibits excellent durability. In addition, although many characteristics including the strength, weather resistance, cold resistance, etc. in the sandbag bag 20 have been mentioned so far, as long as any one of the listed characteristics is improved as compared with the conventional sandbag bag. It can be said that the durability of the sandbag bag 20 is improved.

  Moreover, as shown in FIG. 3, the vinylon fiber used for the thread | yarn 44 of the mouth strap 40 which comprises the sandbag bag 20 of this embodiment has the outstanding heat resistance in a synthetic fiber, intensity | strength, a weather resistance, etc. . In this application, since flame retardance is further required, the yarn 44 is subjected to flame retardancy treatment. In addition, the polyarylate fiber used for the sewing thread of the sewing portion 50 constituting the sandbag bag 20 of the present embodiment is very expensive, but has excellent strength and weather resistance, and is inherently difficult. Also has flammability. Here, since the synthetic fiber is superior in bendability when bent with respect to the longitudinal direction of the fiber as compared with the basalt fiber, the synthetic fiber constitutes the sewing thread and the mouth strap 40 used for sewing the woven fabrics 60 together. Suitable as the thread 44 to be used. Therefore, vinylon fiber and polyarylate fiber excellent in bendability, weather resistance, and the like are suitably employed as the thread 44 of the mouth strap 40 and the sewing thread of the sewing portion 50, respectively. Note that the thread 44 of the lace 40 may be made of polyarylate fiber, or the sewing thread of the sewing portion 50 may be made of vinylon fiber.

  Further, in the sandbag bag 20 formed by stitching the woven fabric 60, when the sand and sand is accommodated in the bag body 30 and used, the load caused by the stored material is applied to the sewing portion 50 that is the portion sewn in the bag body 30. Concentrate. Therefore, the sandbag 20 in this embodiment not only uses high-strength polyarylate fiber as a sewing thread, but covers the sewing portion 50 provided on the bottom 34 and one side portion 35 of the sewing portion 50 of the bag body 30. The cloth 70 is provided for reinforcement. The reason why the covering cloth 70 is not provided on the sewing portion 50 in the mouth portion 31 is that the load due to the stored items is less likely to be concentrated as compared with the bottom portion 34 and the one side portion 35.

  Further, in the string passing portion 32, the soft vinyl chloride impregnated in the woven fabric 60 is not good in slipperiness between the surface of the woven fabric 60 and the mouth strap 40, so that the friction tends to increase. In that respect, since the sandbag 20 in the present embodiment is provided with the friction reducing sheet 80 made of polyester, polyethylene, or the like in the string passing portion 32, the friction of the mouth strap 40 in the string passing portion 32 is reduced. The The friction reducing sheet 80 also reduces the friction of the lace 40 in the string passage portion 32 by suppressing contact between the basalt fiber itself constituting the woven fabric 60 and the lace 40.

  Further, the woven fabric 60 composed of basalt fibers is a hard woven fabric as compared with a woven fabric composed of fibers such as polypropylene and polyethylene. Therefore, the sandbag bag 20 having the bag body 30 made of basalt fiber requires a larger force when the mouth portion 31 is squeezed by the strap 40 than the sandbag bag made of polypropylene, polyethylene, or the like. By providing the friction reducing sheet 80 in the string passage portion 32, the force required for drawing the mouth portion 31 is reduced.

According to said embodiment, the following effects can be acquired.
(1) The durability of the sandbag bag 20 can be improved by using basalt fibers for the woven fabric 60 constituting the bag body 30.

  (2) Since the woven fabric 60 is impregnated with a soft resin, the displacement of the texture of the woven fabric 60 is suppressed without impairing the flexibility and strength of the woven fabric 60 constituting the bag body 30 by the resin coating. In addition, the sewing strength can be improved. In addition, by using soft vinyl chloride as a soft resin, the texture of the woven fabric 60 and the sewing strength thereof can be maintained even during long-term use, and the woven fabric 60 can be provided with flame retardancy.

(3) The durability of the sandbag 20 can be improved by using polyarylate fibers for the sewing thread forming the sewing portion 50.
(4) The sewing portion 50 can be reinforced by the covering cloth 70 made of basalt fibers.

(5) The mouth portion 31 of the bag body 30 can be easily drawn by the friction reducing sheet 80 provided in the string passage portion 32.
(6) The durability of the sandbag bag 20 can be improved by using vinylon fiber for the yarn 44 constituting the mouth strap 40.

(7) By forming the mouth strap 40 with a triple cord by the core cord 41 as the twisted cord, the first tubular cord 42 as the braid and the second cylindrical cord 43, it is possible to realize both the tensile strength and the binding property.
In addition, you may change the said embodiment as follows. Further, the following modifications may be combined as appropriate.

  As shown in FIG. 10, a plurality of holes 90 through which the mouth strap 40 passes are provided in the string passage portion 32, and the mouth strap 40 passes through the string passage portion 32 so as to alternately extend the outer surface and the inner surface of the bag body 30. It is good also as a structure to be made. According to this modified example, the mouth portion 31 can be easily drawn.

The covering cloth 70 may be sewn on the sewing portion 50 provided in the mouth portion 31.
The woven fabric 60 may be woven by various other weaving methods such as twill weave and satin weaving, and is not limited to plain weaving.

-The thread | yarn 44 which comprises the lace 40 may be comprised not only from vinylon fiber but from other fiber materials.
-The sewing thread which forms the sewing part 50 may be comprised not only from the polyarylate fiber but from other fiber materials.

The resin impregnated in the woven fabric 60 is not limited to vinyl chloride but may be various other types of resins such as ethylene vinyl acetate (EVA).
-Two or more mouth straps 40 may be passed through the string passage portion 32.

  The mouth strap 40 does not have to be formed in triple with the core cord 41, the first tubular cord 42, and the second tubular cord 43, and any of the core cord 41, the first tubular cord 42, and the second tubular cord 43 It may be composed of one or two of them. Further, the mouth strap 40 is not limited to a string made of fibers, and may be a leather or resin string.

  The bag 30 may be configured by stitching two woven fabrics 60 together. Further, the bag body 30 may be configured to have a cylindrical shape. The said embodiment shows one shape of the bag body 30 in the sandbag bag 20, and the shape of the bag body 30 is not limited to the said embodiment.

  DESCRIPTION OF SYMBOLS 20 ... Sandbag bag, 30 ... Bag body, 31 ... Mouth part, 32 ... String through part, 40 ... Mouth string, 50 ... Sewing part, 60 ... Woven cloth, 70 ... Cover cloth, 80 ... Friction reduction sheet.

Claims (5)

Provided with a bag made of woven fabrics sewn together with sewing thread,
The woven fabric is a sandbag bag made of basalt fiber.   The sandbag bag according to claim 1, wherein the woven fabric is impregnated with a soft resin.   The sandbag according to claim 1 or 2, wherein the sewing thread is made of polyarylate fiber.   The at least part of the sewing parts where the woven fabrics are sewn together is formed by sewing a covering fabric made of basalt fibers together with the woven fabric, like the woven fabric. The sandbag bag as described in any one of them. The bag body has a string passage part through which a mouth string for drawing the mouth part opened to the bag body is passed,
The sandbag according to any one of claims 1 to 4, wherein the stringing portion is provided with a friction reducing sheet for reducing friction of the mouth strap in the stringing portion.

Images