JP2023037474A - Sediment charging tool, and forming method of large-sized sandbag - Google Patents

Abstract

To provide a sediment charging tool capable of reducing the labor of molding sediment in a bag-like body.SOLUTION: A sediment charging tool 10 comprises: a cylindrical body 11 having an inside volume capable of filling sediment to be filled in a bag-like body inside, opening at an upper part and a lower part, and capable of being arranged in the bag-like body 21 of a large-sized sandbag 20; and an engagement body 12 whose upper end is attached to an outside face of the cylindrical body 11 and which has a hook 12A engaged with an upper end of a hanging belt 23 of the large-sized sandbag 20 so as to be released at a lower end. When the maximum length between the upper end and the lower end of the hanging belt 23 is A, the maximum length in the vertical direction between the upper end and the hook 12A of the engagement body 12 is B, height difference between the maximum height of sediment to be filled in the bag-like body 11 and the lower end of the hanging belt 23 is C, and height difference between the upper end of the engagement body 12 and the lower end of the cylindrical body 11 is D, the relational expression of A+B≥C+D is satisfied.SELECTED DRAWING: Figure 4

Description

TECHNICAL FIELD The present invention relates to a sand throwing jig and a method of making a large sandbag using the sand throwing jig.

Large sandbags are used to fill and store soil excavated during building foundation work, etc., as well as for temporary coffering of river structures, earth retention during road construction and disaster recovery work, etc. be.

Patent Literature 1 describes a technique of attaching a powder or granular material guide (earth and sand throwing jig) to a large sandbag and throwing earth and sand into a bag (bag-like body) of the large sandbag. A pair of locking members are attached to a cylindrical body (cylindrical body) that is the main body of the granular material guide.

Specifically, first, a retaining member of a large sandbag is hooked to a retaining body made of a retaining string, and earth and sand are thrown into the cylindrical body while the cylindrical body is attached to the bag body. After that, by lifting the granular material guide, the earth and sand in the cylinder fall into the bag. Although the bag does not move due to the weight of the fallen earth and sand, the granular material guide is lifted up, and the latching between the latching body and the latching member is automatically released. By completely pulling up the powder guide, the bag is filled with earth and sand.

Japanese Patent No. 4122363

However, in the technique described in Patent Document 1, the cylindrical body is pulled out from the bag body whose bottom surface is in contact with the ground while part of the earth and sand remains inside (especially see FIG. 6 of Patent Document 1). Therefore, the earth and sand remaining in the pulled-out cylinder flow down into the bag. At this time, the bag is not supported by the granular material guide, and the soil in the bag loses its shape. For this reason, there is a problem that it is troublesome to re-hang the large sandbag and form the sand inside the bag.

SUMMARY OF THE INVENTION In view of the above points, it is an object of the present invention to provide an earth and sand throwing jig and a method for making a large sandbag that can reduce the labor required to form earth and sand in a bag-like body.

The earth and sand throwing jig of the present invention includes a bag-shaped body having an opening at the top, and a cover having a lower end attached to the upper end of the bag-shaped body and capable of covering the opening of the bag-shaped body. A sand throwing jig used when throwing sand into the bag-shaped body of a large sandbag having a body and a locked body having a lower end attached to an outer side surface of the bag-shaped body, a cylindrical tubular body having an internal volume capable of being filled with earth and sand to be filled in the bag-shaped body, having an upper and a lower opening, and capable of being placed in the bag-shaped body; an engaging body having an upper end attached to the outer side surface of the tubular body and having an engaging portion releasably engaged with the upper end of the object to be engaged at the lower end; A is the maximum length in the vertical direction between the upper end and the lower end of the body, B is the maximum length between the upper end of the locking body and the locking part, and the filled bag is C is the height difference between the maximum height of the earth and sand to be removed and the lower end of the locked body, and D is the height difference between the upper end of the locking body and the lower end of the cylindrical body. It is characterized in that a relational expression of A+B≧C+D is established when

According to the earth and sand throwing jig of the present invention, since the relational expression of A+B≧C+D is established, the cylindrical body is arranged in the bag-shaped body, and the earth and sand to be filled in the bag-shaped body is put into the cylindrical body. After that, when the cylindrical body is lifted together with the bag-shaped body in a state where the locking portion is locked to the upper end of the locked body, when all the earth and sand are filled in the bag-shaped body, the cylindrical body The lower end is the same as or higher than the upper surface of the earth and sand.

As a result, the molded bag-shaped body is maintained in a state filled with earth and sand, so that the earth and sand in the bag-shaped body are molded as compared with the technique described in Patent Document 1, in which the earth and sand flow down after being molded. It becomes possible to aim at control of time and effort.

In the earth and sand throwing jig of the present invention, it is preferable to provide a pair of first hooks capable of hooking the cover body at opposing positions on the upper portion of the outer side surface of the cylindrical body.

In this case, when the cylindrical body containing the earth and sand is lifted while the cover body is hooked on the pair of first hooks, the sand is filled in the bag-shaped body with the upper part lifted. It is possible to further reduce the labor required to shape the earth and sand in the bag-shaped body.

Further, in the earth and sand throwing jig of the present invention, a pair of second hooks capable of hooking the cover body to opposing positions of the outer side surface of the tubular body below the pair of first hooks. A hook is preferably provided.

In this case, when the cylindrical body is lifted together with the bag-shaped body while the cover body is hooked on the pair of second hooks, sand is filled in the bag-shaped body with the upper part lifted. It is possible to further reduce the labor required to form the earth and sand in the shaped body.

A method for making a large-sized sandbag according to the present invention is a method for making a large-sized sandbag using the earth and sand throwing jig according to the present invention, comprising the step of placing the cylindrical body on the inner bottom surface of the bag-shaped body. a step of locking an upper end portion of the body to be locked to the locking portion; a step of throwing earth and sand to be filled into the bag-like body into the interior of the cylindrical body; and a step of lifting the cylindrical body. a step of throwing all the earth and sand put into the inside of the tubular body into the inside of the bag-shaped body; a step of lowering the tubular body on top of the earth and sand thrown into the inside of the bag-shaped body; The method is characterized by comprising the steps of: releasing the locking between the locking portion and the upper end portion of the locked body; and lifting the cylindrical body to separate the earth and sand throwing jig from the large sandbag. .

According to the large-sized sandbag making method of the present invention, since the relational expression A+B≧C+D is established, when the step of putting all the earth and sand thrown into the tubular body into the bag-shaped body is completed, the tubular body The lower end of the shaped body is the same as or higher than the upper surface of the earth and sand.

As a result, the molded bag-shaped body is maintained in a state filled with earth and sand, so that the earth and sand in the bag-shaped body are molded as compared with the technique described in Patent Document 1, in which the earth and sand flow down after being molded. It becomes possible to aim at control of time and effort.

In the method for making a large sandbag of the present invention, before the earth and sand are thrown into the cylindrical body, the cover is attached to a pair of first hooks provided at opposing positions on the outer side surface of the cylindrical body. It further comprises a step of hooking the body, and a step of releasing the hook between the pair of first hooks and the cover body before lifting the cylindrical body and throwing earth and sand into the bag-shaped body. is preferred.

In this case, the cylindrical body containing the earth and sand is lifted while the cover body is hooked on the pair of first hooks. It is possible to further reduce the labor for shaping the earth and sand.

Further, in the method for making a large sandbag according to the present invention, after the hooking between the pair of first hooks and the cover body is released, the cylindrical body is lifted up to fill the inside of the bag-shaped body with earth and sand. a step of hooking the cover body on a pair of second hooks provided below the pair of first hooks at positions facing each other on the outer side surface of the cylindrical body, before inserting the cylindrical body; It is preferable to further include a step of releasing the hook between the pair of second hooks and the cover body before lifting the body again and separating the earth and sand throwing jig from the large sandbag.

In this case, since the tubular body is lifted together with the bag-shaped body while the cover body is hooked on the pair of second hooks, sand is filled in the bag-shaped body with the upper part lifted. It is possible to further reduce the effort required to shape the earth and sand in the body.

FIG. 4 is a schematic side view for explaining the method of making the large-sized sandbag according to the embodiment of the present invention, and shows a state in which the earth and sand throwing jig is arranged in the bag-shaped body. FIG. 4 is a schematic side view for explaining a method of making a large-sized sandbag, and shows a state in which the bag-like body is held without slack. It is a model side view explaining the preparation method of a large-sized sandbag, and shows the state which started lifting the earth-and-sand injection jig. It is a model side view explaining the preparation method of a large-sized sandbag, and shows the state which lifted the large-sized sandbag with the earth-and-sand injection jig. It is a model side view explaining the preparation method of a large-sized sandbag, and shows the state which lowered the cylindrical body on the earth and sand.

A sand throwing jig 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. The earth and sand throwing jig 10 is used as an auxiliary jig when throwing earth and sand into the large sandbag 20 . 1 to 5, the shapes, dimensions, etc. of the constituent elements are deformed for easy understanding.

The large sandbag 20 has an opening at the top, a bag-shaped body 21 filled with earth and sand, and a lower end attached to the upper end of the bag-shaped body 21, and the opening at the top of the bag-shaped body 21. and a hanging belt 23 having a lower end attached to the outer side surface of the bag-shaped body 21. - 特許庁

The bag-like body 21 and the cover body 22 are made of synthetic fiber fabric or sheets made of synthetic resin materials such as polypropylene, polyester, polyethylene, and polyamide, and have high strength, weather resistance, and durability. .

The bag-shaped body 21 filled with earth and sand has a substantially cylindrical shape as a whole here. However, it may be in a polygonal prism shape such as a quadrangular prism shape. Moreover, the bag-shaped body 21 is here planned to be filled with earth and sand up to its top end. However, the bag-shaped body 21 may be filled with earth and sand up to a position lower than the top by a predetermined height.

The cover body 22 has a cylindrical shape with upper and lower openings, and the lower edge of the cover body 22 is attached to the upper edge of the bag-like body 21 by sewing along the entire circumference. By folding the cover body 22 inward, it is possible to cover the upper opening of the bag-shaped body 21 filled with earth and sand.

If the cover 22 can cover the opening of the bag-shaped body 21, the cover body 22 is not covered around the entire circumference, but partially or partially divided into a plurality of parts. may be attached to the

Furthermore, the cover body 22 may be detachably provided with respect to the bag-shaped body 21 . The cover body 22 has a string-like or rope-like binding body (not shown) for binding the cover body 22 that seals the opening of the bag-like body 21 .

The suspension belt 23 is a belt used when suspending the large sandbag 20, and corresponds to the object to be locked of the present invention. The hanging belt 23 is a belt-shaped woven synthetic resin material such as polypropylene, polyester, polyethylene, polyamide, etc., and has high strength, weather resistance and durability. However, instead of the suspension belt 23, an elongated cord-like one may be used, and furthermore, a hook or handle made of resin, metal, or the like may be used.

Both ends of the suspension belt 23 are attached to the outer side surfaces of the bag-shaped body 21 by sewing or the like. The suspension belt 23 is attached symmetrically with respect to the longitudinal central axis of the bag-like body 21 here. Since both ends of the suspension belt 23 are attached to the bag-shaped body 21, the central portion is positioned upward and becomes the upper end by lifting the vicinity of the central portion, and the mounting portions of both ends become the lower end. , the whole becomes taut. In this way, the central portion of the suspension belt 23 in the state where the vicinity of the central portion is lifted corresponds to the upper end portion of the object to be locked of the present invention, and the mounting portions at both ends correspond to the lower end portion of the object to be locked of the present invention. Equivalent to.

Although there are two hanging belts 23 here, it may be three or more. can be one.

The earth and sand injection jig 10 has an internal volume capable of being filled with earth and sand to be filled in the bag-like body 21, and is open at the top and bottom so that it can be placed inside the bag-like body 21. and a hook 12A whose upper end is attached to the outer side surface of the tubular body 11 and whose lower end is releasably engaged with the upper end of the suspension belt 23. a body 12;

The cylindrical body 11 is the main body of the earth and sand throwing jig 10, and is made of metal such as steel, aluminum alloy, or the like. The tubular body 11 is here a substantially cylindrical tubular body, but its shape is not limited as long as it can be arranged in the bag-shaped body 21. For example, it may be a polygonal tubular shape such as a square tubular shape. and so on. Further, the cylindrical body 11 may have a shape such that the upper portion thereof expands upward.

The internal volume of the tubular body 11 (the internal volume when it is assumed that the upper and lower openings are closed) is equal or approximately equal to the volume of earth and sand to be filled in the bag-shaped body 21 here. As a result, when the earth and sand are thrown up to the top end of the tubular body 11, the bag-shaped body 21 can be filled with a desired volume of earth and sand simply by moving all the earth and sand in the tubular body 11 into the bag-shaped body 21.例文帳に追加becomes possible.

However, the internal volume of the tubular body 11 may exceed the capacity of the earth and sand to be filled in the bag-shaped body 21 . In this case, the cylindrical body 11 is filled with earth and sand to a predetermined height, and the earth and sand are thrown into the bag-shaped body 21 .

The locking body 12 includes a chain 12C having a hook 12A capable of locking the upper end of the suspension belt 23 at its lower end, and a hook 12B also at its upper end. , and is composed of a hook 12B and an attachment portion 12D that is releasably locked. Here, the mounting portion 12D is a rectangular metal piece with a through hole formed therein, and is fixed to the cylindrical body 11 by welding. Note that the hook 12A corresponds to the locking portion of the present invention.

Instead of the chain 12C, an elongated string-like, band-like, belt-like, non-stretchable and high-strength material may be used. Here, the hook 12B is a shackle, the U-shaped member of the shackle 12B is engaged with the mounting portion 12D, and the upper end of the chain 12C is fixed to the rod-shaped member of the shackle 12B.

The locking bodies 12 are provided in the number and positions corresponding to the suspension belts 23 .

The earth and sand throwing jig 10 further includes a locked portion 13 on the upper portion of the tubular body 11 . A wire rope 31 is hooked on a hook (not shown) of a crane or the like, and this locked portion 13 can be locked by a hook 32 attached to the tip of the wire rope 31 . The wire rope 31 may be hung on a hook (not shown) attached to a bucket of a construction machine such as a backhoe.

The engaged portion 13 is a through hole formed in the upper portion of the cylindrical body 11 here. Two through holes 13 are formed in the upper end portion of the cylindrical body 11 symmetrically with respect to the vertical central axis of the cylindrical body 11 . However, the engaged portions 13 may be formed at three or more locations as long as they are symmetrical. Further, the engaged portion 13 is not limited to a through hole as long as it is engaged with the hook 32 or the like. It may also be a member such as a rectangular metal piece on which is formed.

The earth and sand throwing jig 10 further includes a pair of first hooks 14 on which the cover body 22 can be hooked at opposing positions on the upper portion of the outer side surface of the cylindrical body 11 . The first hooking portion 14 is a hook-shaped member provided so as to protrude from the upper portion of the cylindrical body 11 .

The first hooks 14 are formed at two locations on the upper portion of the cylindrical body 11 symmetrically with respect to the vertical central axis of the cylindrical body 11 . However, the number of first hooks 14 may be one or more, and may be plural.

The first hook portion 14 is arranged so that the cover body 22 can be maintained when the cylindrical body 11 is arranged on the inner surface of the bottom surface of the bag-shaped body 21 and the cover body 22 is lifted upward by expanding the bag-shaped body 21 . is provided on the cylindrical body 11 at a height corresponding to the upper portion of the cover body 22 lifted up.

The earth and sand throwing jig 10 further has a pair of second hooks 15 capable of hooking the cover body 22 on the outer side surface of the tubular body 11 at opposing positions below the first hooks 14 . I have. The second hooking portion 15 is a hook-shaped member that protrudes near the middle portion of the cylindrical body 11 in the vertical direction.

The second hooking portions 15 are formed at two locations in the intermediate portion of the cylindrical body 11 symmetrically with respect to the vertical central axis of the cylindrical body 11 . However, the number of the second hooks 15 may be one or more, and may be plural.

Referring to FIG. 4, the second hooking portion 15 maintains the cover body 22 when the cylindrical body 11 is lifted so that the lower end is higher than the upper surface of the earth and sand filled in the bag-shaped body 21. , is provided on the cylindrical body 11 at a height corresponding to the upper portion of the lifted cover body 22. As shown in FIG.

Note that the portion of the cover body 22 that is caught by the first and second hooks 14 and 15 does not have a through hole formed in advance, even if the portion is torn and a through hole is formed during hooking. There may be.

In the earth and sand throwing jig 10 and the large sandbag 20 described above, referring to FIG. B is the maximum length between the portion and the hook 12A; and the lower end of the tubular body 11, the following relational expression (1) holds.
A+B≧C+D (1)

A method of making a large sandbag according to an embodiment of the present invention using the sand throwing jig 10 described above will be described below with reference to FIGS.

In this method, first, as shown in FIG. 1, the step of arranging the tubular body 11 on the inner bottom surface of the bag-shaped body 21 is performed. In this process, a wire rope 31 is hung on a hook (not shown) of the crane or the like, and a hook 32 attached to the tip of the wire rope 31 is engaged with the locked portion (through hole) 13 of the cylindrical body 11. stop.

In this state, the earth and sand injection jig 10 is lifted by raising the wire rope 31 by hoisting the hook of the crane. Then, an operator places the large-sized sandbag 20 on the ground or the like, and spreads the placed large-sized sandbag 20. - 特許庁Then, the tubular body 11 is arranged on the inner bottom surface of the bag-shaped body 21 . After the placement, the hook 32 is unlocked from the locked portion 13, and then the crane or the like is withdrawn.

Next, as shown in FIG. 2, a step of locking the suspending belt 23 with the hook 12A provided at the lower end of the chain 12C of the sand throwing jig 10 is performed. Specifically, the worker spreads the large sandbag 20 upward so as to cover the circumference of the cylindrical body 11, and hooks the hanging belt 23 on the hook 12A. As a result, the suspension belt 23 is engaged with the hook 12A.

At this time, the difference in height between the mounting portion of the suspension belt 23 and the upper end of the chain 12C is shorter than the length of the chain 12C, and the suspension belt 23 is in a state where the central portion hangs down.

A step of hooking the upper portion of the bag-like body 21 on the first hooking portion 14 is also performed. In this step, the operator hooks the upper portion of the cover body 22 on the first hook portion 14 provided on the upper portion of the tubular body 11 . Thereby, the state in which the bag-shaped body 21 is lifted is maintained.

Next, a step of throwing earth and sand to fill the bag-like body 21 into the cylindrical body 11 is performed. In this step, the operator uses the crane or the like to throw earth and sand up to the top end of the tubular body 11 .

Next, as shown in FIG. 3, a step of lifting the tubular body 11 and throwing all the earth and sand thrown into the tubular body 11 into the bag-shaped body 21 is performed. In this step, the operator again engages the hook 32 attached to the tip of the wire rope 31 with the engaged portion (through hole) 13 of the cylindrical body 11 . After that, before that, or after starting to lift the earth and sand throwing jig 10 described later, the operator releases the hooking of the cover body 22 by the first hooking portion 14, and instead of that, the second The upper part of the cover body 22 is hooked on the hook part 15.例文帳に追加

After these, the worker starts lifting the earth and sand injection jig 10 by raising the crane or the like. Along with this lifting, the earth and sand inside the cylindrical body 11 are successively thrown into the bag-shaped body 21 .

It should be noted that lifting of the earth and sand throwing jig 10 may be started without releasing the hooking of the cover body 22 by the first hooking portion 14 . In this case, the first hook 14 may cause damage such as tearing of the cover body 22, but the performance of the large sandbag 20 is not affected.

Alternatively, the cover body 22 may be hooked on the second hooking portion 15 after starting to lift the earth and sand throwing jig 10 .

When the earth and sand in the cylindrical body 11 are all thrown into the bag-shaped body 21, the lower end of the cylindrical body 11 is approximately the same height as the upper surface of the earth and sand. Further, the earth and sand throwing jig 10 may be lifted so that the lower end of the cylindrical body 11 is slightly lifted from the upper surface of the earth and sand. However, the bag-shaped body 21 does not have to float on the ground or the like, and the bottom surface of the bag-shaped body 21 may partially or entirely contact the ground or the like.

When the bottom surface of the bag-like body 21 is lifted or is about to be lifted, the chain 12C and the suspension belt 23 are in a taut state. In this state, in the present embodiment, the lower end of the cylindrical body 11 is positioned substantially at the same height as the top surface of the earth and sand, or above the top surface of the earth and sand with a gap therebetween.

In this state, as described above, A is the maximum length between the upper end and the lower end of the suspension belt 23, B is the maximum length between the upper end of the locking body 12 and the hook 12A, and B is the bag-like shape. C is the height difference between the maximum height of the earth and sand to be filled in the body 21 and the lower end of the suspension belt 23, and the height difference between the upper end of the locking body 12 and the lower end of the cylindrical body 11 is C. When D, it can be expressed by establishing the following relational expression (1).
A+B≧C+D (1)

Since the formula (1) holds, the tubular body 11 is not buried in the sand when the bag-shaped body 21 is filled with all the sand. Therefore, when the buried cylindrical body 11 is lifted as in the technique described in Patent Document 1, the earth and sand inside the cylindrical body 11 do not flow. Therefore, the bag-shaped body 21 filled with earth and sand is maintained in a neatly molded state.

Further, when earth and sand are thrown in, the suspension belt 23 attached to the top of the bag-like body 21 is pulled, and the cover body 22 is hooked on the second hooking portion 15, so that the bag-like body 21 is The bag-like body 21 is neatly filled with earth and sand instead of being in a slack state.

It should be noted that the lifted large sandbag 20 may be moved to a place to be installed.

After that, as shown in FIG. 5, a step of lowering the cylindrical body 11 onto the earth and sand thrown into the bag-shaped body 21 is performed. In this step, the operator lowers the crane or the like to place the earth and sand on the earth and sand loading jig 10 . At this time, the lower end portion of the cylindrical body 11 is slightly sunk into the earth and sand, so the earth and sand that have been shaped are maintained substantially as they are.

Next, a step of releasing the locking of the suspension belt 23 by the hook 12A of the sand throwing jig 10 is performed. As a result, the sand throwing jig 10 and the large sandbag 20 can be separated.

Finally, a step of lifting the earth and sand throwing jig 10 again and separating the earth and sand throwing jig 10 from the large sandbag 20 is performed. In this step, the operator lifts the crane or the like to separate the earth and sand throwing jig 10 from the large sandbag 20 .

By changing the length of the chain 12C, it is possible to use the same cylindrical body 11 for large-sized sandbags 20 of different sizes. In this case, the length of the chain 12C may be determined according to the size of the large sandbag 20 so that the formula (1) holds. In order to change the length of the chain 12C, it may be replaced with a chain of a different length. good too.

The present invention is not limited to the earth and sand throwing jig 10 described above and the method of making a large sandbag using the same, and can be modified as appropriate. For example, the earth and sand throwing jig 10 may not include the first hook 14 and the second hook 15 .

DESCRIPTION OF SYMBOLS 10... Earth and sand throwing jig, 11... Cylindrical body, 12... Locking body, 12A... Hook (locking part), 12B... Hook, shackle, 12C... Chain, 12D... Mounting part, 13... Through hole (locking part) 14 First hook 15 Second hook 20 Large sandbag 21 Bag-shaped body 22 Cover body 23 Hanging belt (locked body) 31 Wire rope, 32 ... hook.

Claims (6)

a bag-shaped body having an opening at the top; a cover having a lower end attached to an upper end of the bag-shaped body and capable of covering the opening of the bag-shaped body; and an outside of the bag-shaped body. An earth and sand throwing jig used when throwing earth and sand into the inside of the bag-shaped body of a large sandbag having a locked body with a lower end attached to a side surface thereof,
a cylindrical tubular body having an internal volume capable of being filled with earth and sand to be filled in the bag-shaped body, having an upper and a lower opening, and capable of being placed in the bag-shaped body; ,
An engaging body having an upper end attached to the outer side surface of the cylindrical body and having an engaging portion releasably engaged with the upper end of the object to be engaged at the lower end,
A is the maximum length in the vertical direction between the upper end portion and the lower end portion of the body to be locked, B is the maximum length between the upper end portion of the locking body and the locking portion, and the bag-shaped body C is the height difference between the maximum height of the earth and sand to be filled and the lower end of the locked body, and the height difference between the upper end of the locking body and the lower end of the cylindrical body A earth and sand throwing jig characterized in that a relational expression of A+B≧C+D holds when D is D. 2. The earth and sand throwing jig according to claim 1, wherein a pair of first hooks for hooking the cover body are provided at opposing positions on the upper portion of the outer side surface of the cylindrical body. 3. A pair of second hooks capable of hooking the cover body are provided at positions facing each other on the outer side surface of the tubular body below the first hooks. The described earth and sand injection jig. A method for creating a large sandbag using the earth and sand throwing jig according to claim 1,
placing the cylindrical body on the inner bottom surface of the bag-shaped body;
a step of engaging the upper end portion of the object to be engaged with the engaging portion;
a step of throwing earth and sand to be filled in the bag-shaped body into the cylindrical body;
a step of lifting the tubular body and throwing all the earth and sand thrown into the tubular body into the bag-shaped body;
a step of lowering the cylindrical body onto earth and sand placed inside the bag-shaped body;
a step of releasing the locking between the locking portion and the upper end portion of the locked body;
A method for making a large-sized sandbag, characterized by comprising a step of lifting the cylindrical body again and removing the earth and sand throwing jig from the large-sized sandbag. In the method for making a large sandbag according to claim 4,
a step of hooking the cover body on a pair of first hooks provided at opposite positions on the upper portion of the outer side surface of the cylindrical body before the earth and sand are thrown into the cylindrical body;
A large sandbag, further comprising a step of releasing the hook between the pair of first hooks and the cover body before lifting the cylindrical body and throwing earth and sand into the interior of the bag-shaped body. How to create. In the method for making a large sandbag according to claim 5,
After releasing the hook between the pair of first hooks and the cover body and before lifting the cylindrical body and throwing earth and sand into the inside of the bag-shaped body, the outer side of the cylindrical body a step of hooking the cover body on a pair of second hooks provided below the pair of first hooks at positions facing each other on the side surface;
A step of releasing the hook between the pair of second hooks and the cover body before lifting the cylindrical body again and separating the earth and sand throwing jig from the large sandbag. How to make large sandbags.

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