Bag-shaped weight

Abstract

To provide a bag-type weight that is easy to manufacture, prevents water leakage, and effectively performs its weighting function. [Solution] This is a bag-type weight constructed by folding a single rectangular sheet of resin, and capable of containing a filler through an opening at the top. Between the lower parts of the first side sheet portion 9 and the second side sheet portion 10, which face each other in a folded state with both longitudinal edges of the rectangular sheet aligned, a bottom sheet portion 15 is provided in a series, connecting the lower edges of the first and second side sheet portions. The bottom sheet portion is interposed as a mountain-folded body, and the edges of the interposed body overlap four times on the left and right sides of the lower portion, and twice on the left and right sides of the upper portion. Each overlapping portion is welded together to form a bag 3. When a filler is contained inside the bag through the opening, the mountain-folded body 19 opens and the bag expands. Bottom deformation absorption portions 37, 37, consisting of recessed portions, are formed on the left and right sides of the bottom of the expanded bag.

Description

Technical Field

[0001] The present invention relates to a bag-shaped weight capable of accommodating a filler through an opening at the upper end of a bag body.

Background Art

[0002] Patent Document 1 provides an example of a water-injection type anchor tool that can exert a required anchoring action in a state where water is accommodated by water injection.

[0003] The water-injection type anchor tool has, for example, a frustum shape, and is configured using a circular lower surface sheet piece that constitutes the lower surface part of a flexible tank, a circular upper surface sheet piece that constitutes the upper surface part thereof, and a fan-shaped side surface sheet piece that constitutes the side surface part thereof.

[0004] The water-injection type anchor tool described in Patent Document 1 has the following characteristics. In the following description of the characteristics, the reference numerals are those described in Patent Document 1. As shown in FIGS. 12(A) and (B) of Patent Document 1, the side surface sheet piece 25 forms a conical cylindrical part 55 when the inclined edge portions 53, 53 at both ends are overlapped in the circumferential direction. In the overlapped state, the edges 56, 56 of the two inclined edge portions 53, 53 are displaced. Further, as shown in FIG. (C) of Patent Document 1, the lower end peripheral edge portion 57 of the conical cylindrical part 55 and the peripheral edge portion 59 of the lower surface sheet piece 21 are overlapped, and the edge 60 of the lower end peripheral edge portion 57 and the edge 61 of the peripheral edge portion 59 are displaced. And the overlapped part 62 is welded in the circumferential direction over the entire area between the two edges <60>, <61>. Further, as shown in FIG. (D) of Patent Document 1, the peripheral edge portion 63 of the upper surface sheet piece 22 and the upper end peripheral edge portion 65 of the conical cylindrical part 55 are overlapped, and the edge 66 of the upper end peripheral edge portion 65 and the edge 67 of the peripheral edge portion 63 are aligned. And the entire overlapped part 69 is welded in the circumferential direction. Further, the overlapped inclined edge portions 53, 53 are welded over the entire length of the inclined direction.

[0005] However, when using a water-filled anchoring device with such a configuration, there was a problem in that it was difficult to reliably weld the lower end peripheral portion 57 of the conical cylindrical part to the peripheral portion of the lower surface sheet piece 21, and the peripheral portion of the upper surface sheet piece 22 to the upper end peripheral portion 65 of the conical cylindrical part 55 while preventing water leakage.

[0006] The reason was as follows: When the lower end peripheral portion 57 of the conical cylindrical part and the peripheral portion of the lower surface sheet piece 21 are overlapped and welded together as shown in Figure 12(C) of Patent Document 1, the circumferential length of the upper peripheral portion and the overlapping lower peripheral portion of the overlapped portion are different, and this difference in circumferential length results in wrinkles. In the welding process, the wrinkles are smoothed out while the wrinkled portion is pressed down to perform welding, but the wrinkles are not always smoothed out evenly, and the pressing pressure during welding in the wrinkled portion and the degree of resin melting in the wrinkled portion are not always uniform, so voids are created in the wrinkled portion, and water leakage occurs from there. Furthermore, when overlapping and welding the peripheral portion of the upper sheet piece and the upper peripheral portion of the conical cylinder, the wrinkles formed when bending the upper peripheral portion 65 are not always evenly stretched, and the pressing pressure during welding in the wrinkled portion and the degree of resin melting in the wrinkled portion are not always uniform. As a result, cavities are formed in the wrinkled portion, and water leakage occurs from there. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2014-224449 [Overview of the project] [Problems that the invention aims to solve]

[0008] The present invention was developed in view of the aforementioned conventional problems, and aims to provide a bag-type weight that is easy to manufacture, reliably prevents leakage of filling materials such as water, and effectively performs its function as a weight. [Means for solving the problem]

[0009] To solve the aforementioned problems, the present invention employs the following means. In other words, the bag-type weight according to the present invention is a bag-type weight that is made by folding a single rectangular sheet of resin which is waterproof and flexible, and is capable of containing a filler material through an opening at the upper end of the bag body, and the opening of the bag body can be sealed with a sealing means. A bottom sheet portion is provided in a series between the lower portions of the first and second side sheet portions, which face each other in a folded state with both longitudinal edges of the rectangular sheet aligned, and the bottom sheet portion is interposed between the lower portions as a mountain-folded body formed by valley folds and mountain folds. When the width direction of the first and second side sheet portions is considered as the left-right direction, the bag base material, in which a mountain-folded body is interposed between the lower portions of the first and second side sheet portions as described above, has the edges of the first and second side sheet portions and the edges of the mountain-folded body overlapping four times on the left and right sides of the lower portion, and the edges of the first and second side sheet portions overlapping twice on the left and right sides of the upper portion located above the lower portion. By welding and integrating the four overlapping portions and the two overlapping portions, a waterproof and flexible bag can be constructed. When the filling material is placed inside the bag through the opening, the folds of the mountain-folded body open, causing the bag to expand and deform, and at the bottom of the bag made of the mountain-folded body with the folds open, The load of the aforementioned filling material conforms to the shape of the installation surface. On the mounting surface Surface state A flexible contact surface portion that can make contact is formed. Furthermore, the left and right portions of the bottom portion are formed such that the upper end of the edge of the mountain-folded body is the top portion. Furthermore, the lower end is open.A recess is formed, and this recess prevents deformation on the left and right sides of the bottom when the bottom of the bag, with the filling material contained inside, comes into contact with the installation surface in a state that conforms to the installation surface due to its flexibility. By letting them escape without restraint The bottom part absorbs deformation. Furthermore, the shape of the lower portion of the expanded weight, which is subjected to pressure when the filler material is contained in the bag-shaped weight, is maintained by reinforcing ribs consisting of four overlapping edges. It is characterized by the following: [Effects of the Invention]

[0010] The bag-type weight according to the present invention is easy to manufacture, reliably prevents leakage of filling materials such as water, and effectively performs its function as a weight. [Brief explanation of the drawing]

[0011] [Figure 1] This is a front view showing a bag-shaped weight according to the present invention. [Figure 2] This is a perspective view showing an inflatable weight formed by filling the inside of a bag-shaped weight with water. [Figure 3] This is a rear view showing an inflatable weight formed by filling the inside of a bag-type weight with water. [Figure 4] This is a plan view showing an inflatable weight formed by filling the inside of a bag-shaped weight with water. [Figure 5] This is a perspective view showing the bag-shaped weight with its upper end opened to form an opening. [Figure 6] This is a perspective view showing the inflatable weights attached to the tent poles. [Figure 7] This is a plan view showing the rectangular sheet that makes up the bag-shaped weight. [Figure 8] This is a perspective view showing a mountain-folded structure interposed between the lower parts of the first and second side sheet sections. [Figure 9] The image shows a front view of the bag body, which is constructed by welding together the edges on both sides, and a side view showing the double overlap and quadruple overlap sections on both sides of the bag body. [Figure 10] This is an explanatory diagram illustrating the deformation absorption function of the bottom of the bag body when it comes into contact with the installation surface, provided by the bottom deformation absorption section. [Figure 11] It is an explanatory diagram for explaining the contact state of the bottom of the bag body with respect to the installation surface. [Figure 12] It is a front view showing the state where the inflatable weight is installed on the installation surface with its axis in a substantially vertical state. [Figure 13] It is a front view showing the state where the axis of the inflatable weight in the installed state on the installation surface is inclined. [Figure 14] It is an explanatory diagram for explaining the deformation absorption action of the bottom of the bag body in contact with the installation surface by the bottom deformation absorption part.

Mode for Carrying Out the Invention

Example

[0012] In FIGS.

[0012] , the bag-shaped weight 1 according to the present invention is configured by folding a single rectangular sheet 2 (for example, made of vinyl chloride) made of resin having waterproofness and flexibility. A filler 5 (FIG. ) can be accommodated into the bag body 3 through an opening 4 (FIG.

[0012] ) at the upper end of the bag body 3, and the opening 4 of the bag body 3 can be sealed by a sealing means 6. The bag-shaped weight 1 is provided between the lower portions 11, 11 of the first side sheet portion 9 and the second side sheet portion 10 facing each other in a folded state where the longitudinal end edges 7,

[0012] of the rectangular sheet 2 are aligned. A bottom sheet portion 15 connecting the lower edges 12, 13 of the first and second side sheet portions 9, 10 is provided in series. The bottom sheet portion 15 is interposed between the lower portions 11, 11 as a mountain-folded bent body 19 formed by valley-fold lines 16, 16 and a mountain-fold line 17. In this embodiment, the short side of the rectangular sheet

[0012] is about 370 mm, the long side is about 1100 mm, and the length between the valley-fold line 16 and the mountain-fold line of the mountain-folded bent body 19 is set to about 10 mm.

[0013] Now, when the width direction of the first and second side sheet portions 9 and 10 is defined as the left-right direction F1, the left and right edges of the first and second side sheet portions 9 and 10 are both represented by reference numeral 21, and the left and right edges of the two mountain-shaped surfaces 22 and 22 of the mountain-folded body 19 are both represented by reference numeral 23. In this case, the bag-shaped base material 24 (Figure 9(A)) formed by interposing the mountain-folded body 19 between the lower portions of the first and second side sheet portions 9 and 10, has edges 21, 23, 23, and 21 overlapping four times on the left and right sides of the lower portion 24A of the bag-shaped base material 24, as shown in Figure 9(C), and edges 21, 21 overlapping twice on the left and right sides of the upper portion 24B located above the lower portion 24A, as shown in Figure 9(B).

[0014] The four overlapping sections 27 and the two overlapping sections 29 are welded together (indicated by reference numeral 28 in Figure 1) to form the waterproof and flexible bag 3. Since the welding can be performed linearly along the extension of the four overlapping sections 27 and the two overlapping sections 29, the welding can be performed reliably and efficiently without the risk of wrinkling, as described in Patent Document 1.

[0015] Then, by filling the bag 3 with the filler material 5 through the wide opening 4 formed between the inner edges 30, 30 of the upper ends of the two overlapping portions 29, 29 that are opposite each other when viewed in the width direction (left-right direction F1) of the bag 3, the folds (the valley folds 16, 16 and the mountain fold 17) of the mountain-folded body 19 (Figure 8) open up, and the bag 3 expands and deforms as shown in Figures 2-4 and 10. Then, a flexible contact surface portion 33 (shown with parallel diagonal lines in Figure 11) that can abut against the installation surface 32 (Figure 10) is formed on the bottom 31 of the bag 3, which is made up of the mountain-folded body 19 with the valley folds 16, 16 and the mountain fold 17 open.

[0016] Furthermore, recessed portions 36 (Figures 10-11) are formed in the left and right portions 34, 34 (Figure 11) of the bottom portion 31, with the upper end 35 (Figure 10) of the edge portion 23 of the mountain-folded body 19 as the apex. These recessed portions 36 serve as bottom deformation absorption portions 37 that absorb deformation on the left and right sides of the bottom portion 31 when the bottom portion 31, due to its flexibility, comes into contact with the installation surface 32 in a state that conforms to the installation surface 32 while the filler material 5 is contained within the bag body 3.

[0017] In this embodiment, the bag-type weight 1 is filled with, for example, about 10 liters of water (one of the filler materials 5) to form an inflatable weight 38 (Figures 2-4) weighing about 10 kg.

[0018] As described above, the double edges 21, 21 and the quadruple edges 21, 23, 23, 21 are each welded together to form the bag 3 which has waterproof and flexible properties (for example, with a welding width of about 10 mm).

[0019] The welded portions 39 (Figure 1) of the double edges 21, 21 and the welded portions 40 (Figure 1) of the quadruple edges 21, 23, 23, 21 function as reinforcing ribs 43 that reinforce the left and right sides 42, 42 of the expanded weight 38 (Figure 3), which takes on a cylindrical shape when water (filler 5) is contained inside the bag 3 as described above. In particular, the welded portions 40 of the quadruple edges 21, 23, 23, 21 are thick and therefore function as highly rigid reinforcing ribs 43a (Figure 1).

[0020] In this embodiment, as shown in Figures 1, 5, and 9, the upper and lower edges of a reinforcing tape (which constitutes the sealing means 6) having a width of approximately 25 mm, and the vertical edges at both ends of the tape, are sewn to the upper edges 46, 46 of the front and back outer surfaces 45, 45 of the bag body 3 (a portion of the sewing line 44 is shown in Figure 1). Furthermore, the portions at both ends of the reinforcing tape 47 are extended outward to form extensions 53, 54. A first engaging member 56 and a second engaging member 57, which constitute a buckle 55 and are detachably connected to each other, are attached to both extensions 53, 54 (Figures 1-4).

[0021] In this embodiment, as shown in Figures 1 and 6, a pair of left and right retaining band pieces 60 and 61 for detachably holding, for example, a tent pole 59 (Figure 6), are provided in two to three rows, vertically, on either one of the first and second side sheet sections 9 and 10, for example, on the longitudinal central portion 58 of the outer surface of the side sheet section 9. In this embodiment, as shown in Figure 1, the pair of retaining band pieces 60 and 61 are sewn to a fixing piece 64, the required intermediate portion 63 of a single strip-shaped piece 62 which is welded to one of the side sheet sections 9. The two side portions 65 and 66 of the pair of retaining band pieces 60 and 61 are detachably integrated by the engagement of a first planar fastener 67 provided on one side and a second planar fastener 69 provided on the other side (Figure 6). In this embodiment, the fixing piece 64 and the pair of retaining band pieces 60 and 61 are pre-attached to the rectangular sheet 2 prior to the welding process.

[0022] Figures 2-4 and 6 show the state in which the opening 4 of the bag 3 is opened wide and water is contained inside the bag 3. As water is contained inside the bag 3, the valley folds 16, 16 and the mountain fold 17 of the mountain fold body 19 open up, and the bag 3 expands and deforms. When, for example, about 10 liters of water is contained inside the bag 3, the expansion weight 38 shown in Figures 2-4 is formed, and the contact surface portion 33 (Figures 10-11) is formed on the bottom portion 31 of the bag 3, which has the mountain fold body 19 (Figure 8) with the valley folds 16 and the mountain folds 17 open, so that it can come into contact with the installation surface 32 in a conforming manner.

[0023] Subsequently, the sealing means 6 having the reinforcing tape 47 seals the opening 4 at the upper end of the bag body 3. The sealing by the sealing means 6 closes the opening 4 at the upper end and folds the upper end portion 70 (Figures 5 and 9) of the bag body 3 multiple times (for example, twice) using the reinforcing tape 47 as a core, according to the width of the reinforcing tape 47. After that, the first engaging member 56 and the second engaging member 57 are detachably connected to each other (Figures 2-4). In this connected state, the folded portion 71 becomes a U-shaped bent portion 72 as shown in Figures 2-3, and this bending deformation seals the opening 4 so that water does not leak out.

[0024] The expansion weight 38 formed by sealing the opening 4 in this manner can be carried using the U-shaped bent portion 72 as a handle.

[0025] Furthermore, as shown in Figures 10-11, recessed portions 36, 36 are formed on the left and right sides of the bottom portion 31 of the bag body 3, with the upper end 35 (Figures 10-11) of the edge portion 23 of the mountain-folded body 19 (Figure 8) as the apex. These recessed portions 36 absorb the deformation 74a, 74b (Figures 10-11) in the left and right sides of the bottom portion 31 (Figure 10) that occurs when the bottom portion 31 (Figure 10) comes into contact with the installation surface 32 (Figures 6, 10) in a state that conforms to the installation surface 32 due to its flexibility. Note that in Figures 10(A) and 10(B), the reinforcing rib 43a is omitted.

[0026] The deformation absorption effect of the recessed portion 36 will be explained using the case where the expansion weight 38 is attached to the tent support pole 59 as an example.

[0027] Figure 6 shows the expansion weight 38 fixed to the tent support pole 59 via the pair of left and right retaining band pieces 60, 61, which are provided in two upper and lower stages. In this fixed state, the expansion weight 38 is cylindrical, and its axis L is approximately vertical. In this state, the four welded portions 40 (Figure 1) protrude outward on the left and right sides of the lower portion 73 of the cylindrical expansion weight 38, where water pressure is applied, and constitute the reinforcing ribs 43a (Figure 2).

[0028] Therefore, the cylindrical expansion weight 38 has a bottom portion 31 that, due to its flexibility, contacts the installation surface (ground) 32 in a flat state that conforms to the surface. Now, for example, when the tent is buffeted by a strong wind and the support pole 59 tilts, the axis L (Figure 6) of the expansion weight 38 fixed to the support pole 59 also tilts. As a result, the bottom portion 31, which is in flat contact with the installation surface 32, deforms due to its flexibility into a flat state that conforms to the installation surface 32 (a flat state that conforms to a curved installation surface). This deformation of the flat state occurs with deformation in the left portion 74a (Figures 10-11) or the right portion 74b (Figure 11) of the bottom portion 31.

[0029] For example, the deformation of the left portion 74a in Figure 11 is absorbed by the recessed portions 36, 36 formed on the left side of the bottom portion 31, as can be seen from the change from the state shown in Figure 10(A) to the state shown in Figure 10(B), and from the change of the left outer edge 76 of the bottom portion 31 from the state shown in Figure 11 to the state shown in Figure 14. Note that the left outer edge 76 of the bottom portion 31, shown by the dashed line in Figure 14, is the same left outer edge 76 shown in Figure 10(B).

[0030] Furthermore, the deformation absorption action in the recessed portion 36 is performed in a manner that does not significantly alter the shape of the outer surface portion 75 (Figures 10 and 13) of the recessed portion 36, because the shape of the lower portion 73 (Figure 10) of the expansion weight 38 is maintained by the highly rigid reinforcing ribs 43a, 43a (Figures 1, 6, and 11). Consequently, even if deformation of the bottom portion 31 occurs as described above, this prevents the upright state of the expansion weight 38 from becoming unstable.

[0031] The features of the bag-shaped weight 1 according to the present invention, as described above, can be summarized as follows: In other words, the bag-type weight 1 according to the present invention is easy to manufacture, and leakage of the filler material 5 such as water can be prevented by the sealing means 6. In addition, as described above, with the present invention, the shape of the lower portion 73 of the inflatable weight 38, in particular, which is subjected to water pressure, is maintained by the reinforcing ribs 43a, and the deformation absorption effect of the bottom portion 31 in the recessed portion 36 is absorbed at the same time. Therefore, for example, when the inflatable weight 38 formed by filling the bag body 3 of the bag-type weight 1 according to the present invention with water is attached to the tent support pole 59 as described above, even when the support pole 59 is tilted, the cylindrical shape of the inflatable weight 38 does not collapse to much extent, and the good weighting effect of the inflatable weight 38 is obtained. As a result, the support pole 59 can be continuously held in a stable state with the shape of the lower portion 73, which is subjected to water pressure, not collapsed to much extent. [Examples]

[0032] The present invention is by no means limited to those shown in the above embodiments, and it goes without saying that various design modifications are possible within the scope of the claims. One example is as follows.

[0033] (1) The resin used to form the waterproof and flexible rectangular sheet 2 may be, in addition to polyvinyl chloride, polyethylene, polyester, polypropylene, nylon, or other resins.

[0034] (2) The filling material 5 contained in the bag 3 is not limited to a liquid such as water, but may be sand, gravel, or the like.

[0035] (3) The sealing means 6 of the opening 4 provided in the bag-shaped weight 1 for housing the filler material 5 in the bag body 3 can employ various known means to prevent water leakage, in addition to those described above. One such means is a means of detachably sealing the opening 4 with a stopper attached to the opening 4, or a means of welding the inner surfaces of the opening 4 together.

[0036] (4) The volume of the bag body 3 of the bag-type weight 1 is set taking into consideration the weight required for the expansion weight 38. When water is to be contained in the bag body 3, it can be set to, for example, 5 to 20 liters.

[0037] (5) The bag-type weight 1 according to the present invention, when the filling material 5 is filled into the bag body 3 to form the expanded weight 38, can be used to fix the tent support poles 59 as described above, as well as to function as a weight to support the lower part of a blind, as an anchor to support a camping tent, as an anchor to support a covering sheet that constitutes a gardening device, and as an anchor to stably support various cover materials and fixing strings, etc. [Explanation of symbols]

[0038] 1. Bag-type weight 2 Rectangular sheet 3 Bag body 4 openings 5 Filling material 6 Sealing means 9. First side sheet section 10. Second side sheet section 11 Lower part 15 Bottom sheet section 16 Valley fold crease 17. Fold crease 19 Mountain-folded bent body 21 Edge 22. Yamagata area 23 Edge 24 Bag base material 27. Quadruple overlapping section 29 Double overlapping section 33 Contact surface part 36 Recessed area 37 Bottom deformation absorption section 38 Inflation Weight 39 Welded part 40 Welded part 41 Inflation Weight 43 Reinforcement Ribs 43a Reinforcement ribs 47 Reinforcement tape 55 Buckle 56 First engaging member 57 Second engaging member 60 retaining band pieces 61 Retaining band piece

Claims

[Claim 1] A bag-type weight is constructed by folding a single rectangular sheet of waterproof and flexible resin, through an opening at the top of the bag body, allowing a filling material to be contained within the bag body, and the opening of the bag body can be sealed with a sealing means. Between the lower portions of the first and second side sheet portions, which face each other in a folded state with their longitudinal edges aligned, a series of bottom sheet portions are provided connecting the lower edges of the first and second side sheet portions. The bottom sheet portion is interposed between the lower parts as a mountain-folded body formed by valley folds and mountain folds, When the width direction of the first and second side sheet portions is considered as the left-right direction, the bag base material, in which a mountain-folded body is interposed between the lower portions of the first and second side sheet portions as described above, has the edges of the first and second side sheet portions and the edges of the mountain-folded body overlapping four times on the left and right sides of the lower portion, and the edges of the first and second side sheet portions overlapping twice on the left and right sides of the upper portion located above the lower portion. The four overlapping sections and the two overlapping sections are welded together to form a waterproof and flexible bag. As the filling material is contained within the bag through the opening, the folds of the mountain-folded body open, causing the bag to expand and deform. A flexible contact surface is formed at the bottom of the bag, which is made of the mountain-folded body in the open state, so that it conforms to the shape of the installation surface due to the load of the filling material and can contact the installation surface in a surface manner. Furthermore, the left and right portions of the bottom are formed with a recessed area where the upper end of the edge of the mountain-folded body is the apex and the lower end is open. The recessed portion serves as a bottom deformation absorption portion that absorbs deformation on the left and right sides of the bottom that occurs when the bottom contacts the installation surface in a state conforming to the installation surface due to its flexibility while the filling material is contained within the bag, thereby allowing deformation to escape without restraint. The shape of the lower portion of the expanded weight, which is subjected to pressure when the filling material is contained within the bag-shaped weight, is maintained by reinforcing ribs consisting of four overlapping edges.

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