Sandbag

Abstract

To provide a sandbag having an outer lid capable of covering the upper surface of a bag body and a hand strap.SOLUTION: A sandbag for forming a sandbag by enclosing a filler therein, comprising: a cylindrical bag body; a suspension belt joined to the bag body; and an outer lid covering an upper surface of the bag body, wherein the suspension belt includes a body belt portion joined to a side surface of the bag body in a vertical direction, and a strap continuous with the body belt portion and extending upward from the bag body.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to sandbags used primarily in civil engineering works, and more particularly to sandbags having hanging belts. [Background technology]

[0002] Weather-resistant sandbag with hanging belt, 1m inside the bag 3 Large weather-resistant sandbags that can hold about 1000 tonnes of soil or other materials are widely used in disaster prevention measures, civil engineering works, and the like. Large weather-resistant sandbags can be stacked to form gravity or leaning retaining walls. These retaining walls are constructed by stacking large weather-resistant sandbags in multiple layers, using slings to lift them up with heavy machinery such as a backhoe with a small mobile crane or a mobile crane, and then lowering them into place. Furthermore, retaining walls made of large weather-resistant sandbags are temporary structures used for emergency or temporary purposes, such as emergency measures in the event of a disaster, temporary earth retaining during construction, and flood prevention, and the suspension belts are left exposed when they are removed and reinstalled. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-218725 Summary of the Invention [Problem to be solved by the invention]

[0004] In this way, after large weather-resistant sandbags are stacked, they are used as retaining walls with the top surfaces of the bags and the hanging handles exposed. When workers place their feet on top to work, they may catch their feet on wrinkles in the top surface of the bags or on the hanging handles, which could cause the worker to trip and fall.

[0005] An object of the present invention is to provide a sandbag having an outer lid that can cover the top surface of the bag body and the hanging handle. [Means for solving the problem]

[0006] The present invention, made to achieve the above-mentioned object, is a sandbag bag that forms a sandbag by sealing a filling material inside, and is characterized in that it has a cylindrical bag body, a hanging belt that is joined to the bag body, and an outer lid that covers the top surface of the bag body, and the hanging belt has a waist belt portion that is joined vertically to the side of the bag body, and a hanging handle that is continuous with the waist belt portion and extends upward from the bag body, and the hanging handle of the hanging belt can be positioned between the top surface of the bag body and the underside of the outer lid. The waist belt portions of the hanging belt are respectively positioned at positions that divide the bag body into approximately four equal parts in the circumferential direction, and the hanging handles of the hanging belt are provided in pairs, connecting two adjacent waist belt portions or two waist belt portions that are positioned symmetrically with respect to the bag body, and the length of each of the two hanging handles may be 1.6 times or more the diameter of the bag body. The outer lid may be joined to the bag body or the waist strap portion. The outer lid may have a cover plate having approximately the same diameter as the bag body and covering the upper surface of the bag body, and a hook portion that stands along the outer periphery of the cover plate and fits into the outer periphery of the upper edge of the bag body. The engaging portion may have an outer diameter adjusting means for reducing and / or increasing the outer diameter relative to the cover plate. The outer lid has approximately the same diameter as the bag body and includes a cover plate that covers the top surface of the bag body and a fixing belt that extends from the outer periphery of the cover plate, and the fixing belt may be connected to the outer periphery of the bag body or the waist belt portion to fix the outer lid to the top surface of the bag body. The fixing belt may be connected to the outer periphery of the bag body or the waistband portion by a hook-and-loop fastener provided on each of them. The fixing belt may be connected to the outer periphery of the bag body or the waist belt portion by inserting and engaging an engagement piece provided at the tip of the fixing belt into a belt loop provided on the outer periphery of the bag body or the waist belt portion. The engaging piece may be formed by folding back and overlapping the tip of the fixing belt. The outer cover may be connected to the hanger. The outer lid may be slidable along the hanging tab. The outer cover may be flexible and may be capable of being wrapped around the outer periphery of the hanger. The outer cover may be flexible and may be folded symmetrically about the hanging handle and rolled up in an overlapping state. The outer cover may be flexible and may be capable of being wound symmetrically around the hanging handle. [Effects of the Invention]

[0007] The present invention has at least one of the following advantages. <1> When stacked as large weather-resistant sandbags, the top of the bag body and the hanging handles are covered with the outer lid, so when workers place their feet on top to work, there is no risk of their feet getting caught on the top surface of the bag body, wrinkles, or the hanging handles, preventing workers from tripping or falling. <2> By joining the outer lid to the bag body or the waist strap, or by connecting the outer lid to the hanging handle, the outer lid and the bag body are integrated, and the outer lid will not be lost. <3> By joining the outer lid to the bag body or the waistband, it is possible to prevent the outer lid from shifting after installation, and to reliably prevent accidents involving workers tripping or falling. [Brief explanation of the drawings]

[0008] [Figure 1] Illustrative diagram of sandbags in Example 1 [Figure 2] An explanatory diagram of the bag body and hanging belt of the sandbag of Example 1 (1) [Figure 3] An explanatory diagram (2) of the bag body and hanging belt of the sandbag of Example 1 [Figure 4] An explanatory diagram of the state in which the hanging handle of the sandbag of Example 1 is folded [Figure 5] Illustrative diagram of sandbags in Example 2 (1) [Figure 6] Explanatory diagram of sandbags in Example 2 (2) [Figure 7]Illustrative diagram of sandbags in Example 3 (1) [Figure 8] Explanatory diagram of sandbags in Example 3 (2) [Figure 9] Illustrative diagram of sandbags in Example 4 (1) [Figure 10] Explanatory diagram of sandbags in Example 4 (2) [Figure 11] Illustrative diagram of sandbags in Example 4 (3) [Figure 12] Illustrative diagram of sandbags in Example 4 (4) DETAILED DESCRIPTION OF THE INVENTION

[0009] The sandbag of the present invention will be described in detail below with reference to the drawings.

[0010] [Example 1] <1> Overview of sandbags The sandbag 1 of the present invention comprises a cylindrical bag body 2 with a bottom and an open top, a hanging belt 3 for hanging the bag body 2, and an outer lid 4 that covers the top surface of the bag body 2 (Figure 1). Sandbag 1 becomes a large, heavy sandbag by filling the bag body 2 with gravel, sand, clay, or other filling material (not shown), and can be stacked to form a gravity-type retaining wall or leaning-type retaining wall. Sandbag 1 is transported to the site in its original bag form, and filling material is filled in when needed on site. The breaking strength of the bag body 2 and the tensile strength of the hanging belt 3 are set so as to be able to withstand the weight of the filling material enclosed inside the bag body 2. Furthermore, since the sandbag 1 according to the present invention is used as a large weather-resistant sandbag, the bag body 2, hanging belt 3, and outer lid 4 are made of weather-resistant synthetic fiber that is resistant to ultraviolet rays, wind, and rain.

[0011] <2> Bag body The bag body 2 is a cylindrically shaped bag made of fabric or a resin sheet. The bag body 2 in this embodiment is cylindrical with a diameter of approximately 1.1 m and a height of approximately 1.1 m, and is provided with a storage section 21 capable of storing filler material inside, and a cylindrical inner lid 22 connected to the upper edge of the storage section 21. The inner lid 22 is intended to prevent the filling material from spilling when the bag body 2 is tilted during transportation or the like after the filling material has been placed in the storage section 21. The inner lid 22 is cylindrical like the storage section 21 so as not to interfere with the pouring of the filling material into the storage section 21, and its height is made equal to or greater than the radius of the storage section 21 so as to be able to completely cover the top surface of the storage section 21. A part of the inner lid 22 may have a string-like or rope-like binding body 23 for sealing the opening of the inner lid 22. The breaking strength of the bag body 2 is set so as to be able to withstand the weight of the filling material enclosed inside the bag body 2.

[0012] <3> Hanging belt The lifting belt 3 is a belt-like member for slinging and lifting the bag body 2 in which the filling material is enclosed. In this embodiment, the hanging belt 3 is formed by crossing waist belt sections 31 that are joined vertically to the side of the storage section 21 of the bag main body 2 at a position that divides the storage section 21 into four equal parts circumferentially at the bottom of the storage section 21, and connecting two adjacent waist belt sections 31 as a set with hanging handles 32 that extend from the two adjacent waist belt sections 31 continuously above the bag main body 2, thereby forming two hanging handles 32. The width of the hanging belts 3 is about 3 to 5 cm, and the tensile strength is set to be sufficient to lift the bag body 2 containing the filling material. For example, if one of the two hanging belts 3 breaks and one hanging belt 3 is used to support the bag, the strength must be such that it can withstand a load that is five times the safety factor for the load acting on one hanging belt 3, taking into account the angle formed by the hanging belts 3, when the total weight including the filling material plus an impact load (added by 30%) is lifted by the single hanging belt 3.

[0013] <4> outer lid The outer lid 4, like the bag body 2, is made of a woven fabric or a resin sheet. The outer lid 4 is placed on top of the bag body 2. At this time, the hanging handle 32 of the hanging belt 3 is placed on the top surface of the bag body 2, so that the hanging handle 32 is placed between the top surface of the bag body 2 and the bottom surface of the outer lid 4, and the outer lid 4 covers the top of the bag body 2, the inner lid 22, and the hanging handle 32. In this embodiment, the outer lid 4 is a cloth-like body having an area larger than the outer diameter of the bag body 2, and covers the top of the bag body 2, the inner lid 22, and the hanging handle 32.A string-like or rope-like outer lid binding body 41 is fastened near the top of the bag body 2 to form an integral part with the bag body 2. When the sandbag 1 of the present invention is stacked as a large weather-resistant sandbag, the top of the bag body 2, the inner lid 22 and the hanging handle 32 are covered by the outer lid 4, so when a worker places his or her feet on top to work, the risk of catching one's foot on the top surface of the bag body 2, wrinkles in the inner lid 22, the hanging handle 32, etc. is eliminated, preventing workers from falling or tripping.

[0014] <5> Hanger type The hanging handles 32 may be connected as a set of hanging handles 32 that extend continuously from two adjacent waist straps 31 above the bag body 2 (Figures 1 and 2), or may be connected as a set of hanging handles 32 that extend continuously from two waist straps 31 that are arranged symmetrically with respect to the bag body 2 above the bag body 2 (Figure 3). In the case of Figure 3, the two sets of hangers 32 cross above the bag body 2, so the hangers 32 need to be placed on the outside of the storage section 21 so as not to interfere with the addition of fill material. For this reason, the length of each hanger 32 is preferably at least 1.57 times the diameter of the bag body, which is half the circumference of the storage section 21, and at least 1.6 times the diameter of the bag body 2. In the case of conventional large weather-resistant sandbags without outer lids 4, if the hangers 32 are too long, there is a high possibility of workers falling, but the sandbag 1 of the present invention can cover the hangers 32 with the outer lid 4, preventing workers from falling. The handles 32 are folded appropriately to fit on the top surface of the bag body 2 and are then covered with the outer lid 4 (Figs. 1 and 4). For example, the handles 32 in Fig. 3 can be folded into three layers to fit on the top surface of the bag body 2. In this case, the handles 32 may be arranged in three layers (Fig. 4(a)), but by shifting the angle of the extension direction of each layer diagonally when folding, and shifting their planar position so that the third layer is not directly above the first layer, the number of layers overlapping at the intersection with the other handles 32 can be reduced, and the unevenness of the top surface of the sandbag 1 can be reduced (Fig. 4(b)). Furthermore, if the filling material is sand or clay, when a worker stands on the hanging handle 32 between the outer lid 4 and the inner lid 22, the filling material directly below the hanging handle 32 moves and fits in, smoothing the top surface of the outer lid 4, further increasing the effectiveness in preventing workers from tripping or falling.

[0015] [Example 2] <1> Outer lid with hook In this embodiment, the outer lid 4 has approximately the same diameter as the bag body 2. It includes a lid plate 42 that covers the top surface of the bag body 2 and a hook portion 43 that extends downward along the outer periphery of the lid plate 42 and fits around the outer periphery of the upper edge of the bag body 2 (FIGS. 5(a) and 5(b)). The hook portion 43 prevents the outer lid 4 from coming off the top surface of the bag body 2, exposing the top surface of the bag body 2, the inner lid 22, and the hanging handle 32. In this embodiment, a connecting portion 431 protruding from the hook portion 43 is joined to the bag body 2 and folded back at the joining portion. This allows the outer lid 4 to be opened to expose the top surface of the bag body 2 when adding filler material, and then folded back from the joining portion of the connecting portion 431 to cover the top surface of the bag body 2 when the bag is set up. Furthermore, by joining the connecting portion 431 to the bag body 2, the outer lid 4 and the bag body 2 are integrated, preventing the outer lid 4 from being lost. The connecting portion 431 may also be joined to the waistband 31. Since the barb 43 fits onto the outer periphery of the upper edge of the bag body 2, by making its inner diameter approximately the same as the outer diameter of the bag body 2, the outer lid 4 is fixed in place by friction between the bag body 2 filled with the filling material and the inner periphery of the barb 43. In this case, by making the height of the barb 43 approximately 1 / 3 of the height of the bag body 2, the barb 43 fits onto the bag body 2 and the outer lid 4 is fixed in place even if the upper end of the bag body 2 is rounded by the filling material. Furthermore, the hook portion 43 may be provided with an outer lid binder 41 as in Example 1 as an outer diameter adjustment means for reducing the outer diameter relative to the lid plate 42. The outer lid binder 41 may be fastened near the top of the bag body 2 to form an integral part with the bag body 2, or a notch 441 may be provided in a portion of the bag body 2, and the outer lid binder 41 may be fastened with hook-and-loop fasteners 442 extending from both sides of the notch 441 along the outer periphery to form an integral part with the bag body 2 (FIGS. 6(a) and 6(b)). By reducing the outer diameter of the hook portion 43 using these outer diameter adjustment means, even if the bag body 2 is irregular in shape due to the filling material or has a rounded upper end, the hook portion 43 is fastened and comes into contact with the bag body 2, generating friction and securing the outer lid 4. Note that the outer diameter relative to the lid plate 42 may be expanded by loosening the outer diameter adjustment means. In this case, the hook portion 43 can be easily fitted to the bag body 2. If the cuff 43 is cylindrical, the vertical position of the cuff on the bag body 2 that corresponds to the upper end of the connecting portion 431 of the outer lid 4 is the lower end of the cuff 43. If the cuff 43 is located one-third of the way down from the upper end of the bag body 2, a larger frictional force can be generated between the bag body 2 and the inner periphery of the cuff 43 than if the cuff 43 is located at the upper end of the bag body 2. On the other hand, if the cuff needs to be located at the upper end of the bag body 2, such as when the outer lid 4 and the bag body 2 are cut out integrally rather than separately and sewn together, the portion of the cuff 43 where the frictional force effectively acts is reduced, raising concerns that the frictional force required to secure the outer lid 4 may be insufficient. However, providing an outer diameter adjustment means makes it possible to generate a larger frictional force, making it easier to fit the cuff 43 to the bag body 2.

[0016] [Example 3] <1> Combination of cover plate and fixing belt The outer lid 4 in this embodiment has approximately the same diameter as the bag body 2 and includes a lid plate 42 that covers the top surface of the bag body 2 and a fastening belt 45 that extends from the outer periphery of the lid plate 42 (FIG. 7(a)). In this embodiment, a portion of the lid plate 42 is joined to the top end of the bag body 2 and folded back at the joint, leaving the top surface of the bag body 2 open. The lid plate 42 can cover the top surface of the bag body 2 with the hanging handle 32 extended when suspended (FIG. 7(b)) and with the hanging handle 32 retracted when installed (FIG. 7(d)). Joining the outer lid 4 to the bag body 2 makes the outer lid 4 and the bag body 2 one unit, preventing the outer lid 4 from being lost and preventing the outer lid 4 from shifting after installation, thereby reliably preventing accidents involving workers tripping or falling. The fixing belt 45 has a hook-and-loop fastener 451 on its back surface (the surface facing the bag body 2 when the bag body 2 is covered with the lid plate 42). The hook-and-loop fastener 24 provided on the waist belt portion 31 on the side of the bag body 2 is joined to the hook-and-loop fastener 451 of the fixing belt 45, thereby connecting the fixing belt 45 to the bag body 2 and fixing the outer lid 4 to the top surface of the bag body 2. Note that the hook-and-loop fastener 24 of the bag body 2 may be provided directly on the bag body 2. Furthermore, in this embodiment, the cover plate 42 is joined to the bag body 2, but the cover plate 42 may be separated from the bag body 2. When the cover plate 42 is joined to the bag body 2, one or more fixing belts 45 are sufficient, but when the cover plate 42 is separated from the bag body 2, three or more fixing belts 45 are preferably used. Furthermore, by connecting the fixing belt 45 and the bag body 2 with hook-and-loop fasteners 451, 24, the outer lid 4 can be easily released when removing the filling material from the bag body 2 after removing the large weather-resistant sandbag.

[0017] <2> How to fasten the fixing belt Furthermore, instead of connecting the fixing belt 45 with the hook-and-loop fastener 451, the fixing belt 45 may be inserted and engaged with a belt loop 311 provided on the waistband 31 on the side of the bag body 2. The belt loop 311 may be provided directly on the bag body 2. The tip of the fixing belt 45 is folded back and partially overlapped and sewn to form an engagement piece 452. Then, the engagement piece 452 of the fixing belt 45 is inserted from above into the belt loop 311 provided horizontally on the waist belt portion 31, and the engagement piece 452 is engaged with the belt loop 311, thereby connecting the fixing belt 45 to the bag main body 2 and fixing the outer lid 4 to the top surface of the bag main body 2. When removing the filling material from the bag body 2 after removing the large weather-resistant sandbag, the engagement piece 452 can be pulled out from the belt loop 311 to release the connection between the fixing belt 45 and the bag body 2, or the stitching at the base of the engagement piece 452 can be undone and the fixing belt 45, which has lost the shape of the engagement piece 452, can be pulled out from the belt loop 311.

[0018] [Example 4] <1> Placement of outer lid on hanging handle In this embodiment, the outer lid 4 can be connected to the hanging handle 32 in advance (Figs. 9 and 10). By connecting the outer lid 4 to the hanging handle 32, the bag body 2 and the outer lid 4 can be transported and carried in together. The outer lid 4 has a loop-shaped holder 46 on one side that allows the outer lid 4 to slide freely along the hanging handle 32, making it easy to adjust the position of the outer lid 4 when covering the bag body 2 and the hanging handle 32. By providing the holder 46 on the inside of the outer lid 4, i.e., on the side facing the bag body 2, the hanging handle 32 and holder 46 are covered by the outer lid 4 when the outer lid 4 is hung on the bag body 2, thereby eliminating the risk of a worker's foot getting caught on the top surface of the bag body 2, wrinkles in the inner lid 22, the hanging handle 32, etc. when working with their feet on top of the sandbag 1, which is a function required of the outer lid 4.

[0019] When the outer lid 4 is fixed to the hanging handle 32, the outer lid 4 is made of a flexible material and wrapped around the outer periphery of the hanging handle 32 to keep it together, and then unfolds to cover the bag body 2 and the hanging handle 32, so that the outer lid 4 does not get in the way when transporting or carrying in the bag or when adding filling material. There are two ways to wrap the outer lid 4 around the hanging handle 32: folding the outer lid 4 symmetrically around the hanging handle 32 and wrapping it in a roughly overlapping semicircular shape (Fig. 11), or wrapping the outer lid 4 around the side of the outer lid 4 that does not have the holder 46, i.e., the side that appears on the top when the outer lid 4 is placed on the bag body 2, in a line-symmetrical manner from its end toward the hanging handle 32, with the hanging handle 32 as the approximate center (Fig. 12). By wrapping the outer lid 4 around the side that does not have the holder 46, the outer lid 4 can be unfolded from the top, making unfolding easier. Methods for holding the rolled up outer lid 4 include wrapping a string 47 around the rolled up outer lid 4 (Figure 11), or fastening a string to the outer lid 4 in advance and tying it, and other methods can be used as appropriate.However, as a method for holding the rolled up outer lid 4 in a state where it is rolled up symmetrically with the hanging handle 32 as the approximate center, as shown in Figure 12, it is also possible to provide multiple loop-shaped string holes 471 in the extension direction of the hanging handle 32 in the part that is exposed when rolled up, and then pass a threaded string 472 through the string holes 471 and tie it. When wrapping symmetrically around the handle 32 (Fig. 12), the outer lid 4 is wrapped in the same direction, making it easy to tighten the lid 4 and fix any looseness when wrapping and tying the string. Furthermore, when unfolding the outer lid 4, the outer lids 4 wrapped around both sides of the handle 32 can be unfolded simultaneously, making unfolding easier. [Explanation of symbols]

[0020] 1 sandbag, 2 bag body, 21 storage section, 22 inner lid, 23 binding body, 24 hook-and-loop fastener 3 Hanging belt, 31 Waist belt, 311 Belt loop, 32 Hanging hand 4 outer lid, 41 outer lid binding body, 42 lid plate, 43 hook portion, 431 connecting portion, 441 notch, 442 hook-and-loop fastener, 45 fixing belt, 451 hook-and-loop fastener, 452 engaging piece, 46 holder, 47 string, 471 string thread, 472 threading string

Claims

1. A sandbag bag in which a filling material is sealed inside to form a sandbag, A cylindrical bag body, A hanging belt joined to the bag body; an outer lid that covers the upper surface of the bag body, The hanging belt has a waist belt portion joined to a side surface of the bag body in the vertical direction, and a hanging handle that is continuous with the waist belt portion and extends upward from the bag body, The hanging handle of the hanging belt can be arranged between the upper surface of the bag body and the lower surface of the outer lid. Sandbags.

2. The waist belt portions of the hanging belt are disposed at positions that divide the bag body into approximately four equal parts in the circumferential direction, The hanging straps of the hanging belt are provided in two pairs, connecting two adjacent waist belts or two waist belts that are arranged symmetrically with respect to the bag body among the four waist belts, The length of each of the two hangers is 1.6 times or more the diameter of the bag body. The sandbag according to claim 1.

3. The outer lid is joined to the bag body or the waistband portion. The sandbag according to claim 1 or 2.

4. The outer lid has approximately the same diameter as the bag body and is a lid plate that covers the upper surface of the bag body; a hook portion that stands along the outer periphery of the cover plate and fits onto the outer periphery of the upper edge of the bag body, The sandbag according to claim 3.

5. The engaging portion has an outer diameter adjusting means for reducing and / or increasing the outer diameter of the engaging portion relative to the cover plate. The sandbag according to claim 4.

6. The outer lid has approximately the same diameter as the bag body and is a lid plate that covers the upper surface of the bag body; a fixing belt extending from the outer periphery of the cover plate, The fixing belt is connected to the outer periphery of the bag body or the waist belt portion, and the outer lid is fixed to the upper surface of the bag body. The sandbag according to claim 3.

7. The fixing belt and the outer periphery of the bag body or the waistband portion are connected to each other by hook-and-loop fasteners. The sandbag according to claim 6.

8. The connection between the fixing belt and the outer periphery of the bag body or the waist belt portion is performed by inserting and engaging an engagement piece provided at the tip of the fixing belt into a belt loop provided on the outer periphery of the bag body or the waist belt portion. The sandbag according to claim 6.

9. The engaging piece is formed by folding back and overlapping the tip of the fixing belt. The sandbag according to claim 8.

10. The outer lid is connected to the hanger. The sandbag according to claim 1 or 2.

11. The outer lid is slidable along the hanging handle. The sandbag according to claim 10.

12. The outer cover is flexible and can be wrapped around the outer periphery of the hanger. The sandbag according to claim 10.

13. The outer cover is flexible and can be folded symmetrically around the hanging handle and rolled up in an overlapping state. The sandbag according to claim 10.

14. The outer cover is flexible and can be wound symmetrically around the hanging handle. The sandbag according to claim 10.

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