Vegetation bags and vegetation mats

Abstract

To provide a vegetation bag that improves water retention and enables more effective greening on a ground or slope.SOLUTION: A vegetation bag 100 comprises: a bag body 101 having a bottom wall portion 102 arranged on the ground side and a top wall portion 104 arranged above the side opposite to the ground; and a vegetation material 111 contained in the bag body 101. The top wall portion 104 comprises a water impermeable region 105 having water impermeability. The portion of the bag body 101 other than the water impermeable region 105 comprises a permeable region 103 having water permeability, and the water impermeable region 105 extends to cover the vegetation material 111 from above.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vegetation bag and a vegetation mat for greening ground such as slopes. [Background technology]

[0002] Greening is actively carried out on construction surfaces such as various slopes and newly developed land to beautify the slopes and prevent soil erosion. Conventionally, in order to green a slope, vegetation materials such as soil, soil improvement materials, seeds, fertilizer, water-retaining materials, and soil bacteria are filled into vegetation bags (hereinafter referred to as vegetation bags), and these vegetation bags are placed on the ground to be greened.

[0003] For example, Patent Document 1 discloses a vegetation material bag (vegetation bag) that can be used to plant vegetation on slopes. In the following paragraphs, the reference number for Patent Document 1 is indicated in parentheses. The vegetation material bag (10) is formed by enclosing a vegetation substrate (30) such as fertilizer, soil conditioner, or water-retaining material, and is stored in a bag-shaped portion (21) of a vegetation mesh (20). Approximately the lower half of the vegetation material bag (10), which faces the valley, is made of a non-soluble material (11), while the upper half of the vegetation material bag (10), which faces the mountain, is made of a soluble material (12). When it rains, the soluble portion (12) begins to dissolve, allowing the vegetation substrate (30) inside the vegetation material bag (10) to absorb water, and then dissipates gradually, or quickly if there is sufficient rain. In contrast, the non-dissolving portion (11) of the vegetation material bag (10) does not dissolve in rain or the like, and therefore remains within the bag-shaped portion (21) of the vegetation mesh (20), for example, and this non-dissolving portion (11) remains open toward the mountain side. As a result, part of the vegetation substrate (30) enclosed within the vegetation material bag (10) remains held by this non-dissolving portion (11). The non-dissolving portion (11) holds part of the vegetation substrate (30) enclosed within the vegetation material bag (10), thereby allowing vegetation to continue on the slope (40). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-7027 Summary of the Invention [Problem to be solved by the invention]

[0005] Generally, vegetation bags are used to absorb moisture from rainfall, supplying the ground with nutrients such as fertilizer, and promote the growth of vegetation. Furthermore, when placed on a slope, vegetation bags can absorb moisture and supply it to the ground during rainfall or watering of the vegetated area. However, conventional vegetation bags have a problem in that even when water is sprayed on the ground in a high-temperature environment, such as on a sunny summer day, the moisture absorbed in the vegetation bag quickly evaporates, causing the vegetation bag and the vegetation material inside it to dry out. In other words, conventional vegetation bags cannot maintain their moisture state for long periods of time in high-temperature environments, and the drying out prevents them from fully contributing to the growth of vegetation.

[0006] The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a vegetation bag and a vegetation mat that improve water retention and enable more effective greening of the ground or slopes. [Means for solving the problem]

[0007] A vegetation bag according to one embodiment of the present invention is a vegetation bag that is placed on the ground to be greened, a bag body having a bottom wall portion disposed on the ground side and a top wall portion disposed above the opposite side of the ground; and a vegetative material contained in the bag, The top wall portion includes a water-tight area that is water-tight, and the portion of the bag body other than the water-tight area includes a water-permeable area that is water-permeable, and the water-tight area extends so as to cover at least a portion of the vegetation material from above.

[0008] According to one embodiment of the vegetation bag of the present invention, the top wall portion located on the side opposite the ground includes a water-blocking area, and the area other than the water-blocking area is a water-permeable area. The water-permeable area allows the vegetation bag to absorb water and supply it to the ground (where vegetation is to be grown). Furthermore, by extending the water-blocking area to cover the vegetation material from above, the amount of water absorbed by the vegetation bag that evaporates is reduced, allowing water to be retained for a longer period of time. Therefore, the vegetation bag of the present invention has improved water retention and enables more effective greening of the ground.

[0009] A further embodiment of the present invention is a vegetation bag according to the above embodiment, characterized in that the water-blocking area is formed of a waterproof sheet having water-blocking and heat-insulating properties. The waterproof sheet may also be made of a foamed resin material. In other words, the insulating properties of the water-blocking area reduce the surface temperature of the top wall exposed to direct sunlight, further reducing the amount of evaporation of water absorbed in the vegetation bag. Therefore, the vegetation bag has improved water retention.

[0010] In a further embodiment of the present invention, the water-blocking area is formed over 60% or more of the surface area of ​​the top wall of the vegetation bag, thereby sufficiently reducing the amount of evaporation of water absorbed in the vegetation bag.

[0011] In a further embodiment of the present invention, the vegetation bag of the above embodiment has a permeable region formed in a portion of the bag facing the side, so that when the vegetation bag is placed on a slope, the permeable region of the vegetation bag allows water flowing along the slope in the direction of the inclination of the slope to pass through the interior of the bag, thereby enabling effective absorption of water.

[0012] The vegetation mat of one embodiment of the present invention comprises one or more vegetation bags of the above embodiment and a water-permeable vegetation sheet extending lengthwise and widthwise in a plane and laid on the ground, wherein the one or more vegetation bags are attached to the vegetation sheet. In other words, by installing the vegetation mat on a slope, it is possible to more effectively green the ground while exerting the effects of the vegetation bags.

[0013] A vegetation mat according to one embodiment of the present invention is a vegetation mat used for slope greening, a water-permeable vegetation sheet that is laid on the ground and extends horizontally and vertically in a plane; and a vegetative material held in a predetermined area on the surface side of the vegetative sheet, The vegetation mat is characterized in that a water-blocking area having water-blocking properties and a water-permeable area having water-permeability are formed, and the water-blocking area extends so as to cover the vegetation material from above.

[0014] According to one embodiment of the vegetation mat of the present invention, water can be absorbed into the vegetation material through the water-permeable region and supplied from the vegetation material to the ground (where vegetation is to be grown). Furthermore, by extending the water-blocking region so as to cover the vegetation material from above, the amount of water absorbed by the vegetation material that evaporates is reduced, allowing the vegetation material to retain water for a longer period of time. Therefore, the vegetation mat of the present invention has improved water retention, enabling more effective greening of the ground. [Effects of the Invention]

[0015] The vegetation bag and vegetation mat of the present invention make it possible to more effectively green the ground or slopes. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic perspective view of a vegetation bag according to one embodiment of the present invention; [Figure 2] Figure 1. Cross section of the vegetation bag. [Figure 3] 1 is a schematic perspective view of a vegetation mat according to one embodiment of the present invention; [Figure 4]Schematic diagram showing the shape of a vegetation bag of one embodiment of the present invention when placed on the ground. [Figure 5] (a) Schematic diagram illustrating the water retention of the vegetation bag in Figure 4 and (b) a schematic diagram showing the characteristics of a conventional vegetation bag. [Figure 6] 1A and 1B are schematic diagrams showing vegetation bags of (a) Comparative Example 1, (b) Comparative Example 2, (c) Example 1, and (d) Example 2 in a demonstration test of the vegetation bags and vegetation mat of the present invention. [Figure 7] Photographs of vegetation mats after a predetermined period of time have passed in a demonstration test of the vegetation bags and vegetation mats of the present invention, showing (a) Comparative Example 1, (b) Comparative Example 2, (c) Example 1, and (d) Example 2. [Figure 8] Schematic diagram showing a modified example of the vegetation bag of the present invention. [Figure 9] 1 is a schematic diagram showing a modified example of the vegetation mat (mainly the vegetation sheet) of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the shapes of the drawings referred to in the following description are conceptual or schematic diagrams for explaining preferred shapes and dimensions, and the dimensional ratios do not necessarily correspond to the actual dimensional ratios. In other words, the present invention is not limited to the dimensional ratios in the drawings.

[0018] The vegetation bag 100 and vegetation mat 10 of one embodiment of the present invention are installed on a slope such as a slope, thereby enabling the promotion of slope greening with vegetation. In this specification, the direction along the inclination of the slope when the vegetation bag 100 and vegetation mat 10 are laid on a slope is defined as the "vertical" direction, and the direction along the contour line of the slope is defined as the "horizontal" direction. Furthermore, when the vegetation bag 100 and vegetation mat 10 are laid on a slope, the side that is located on the toe side (upper or higher side) of the slope is defined as the "upper" position, and the side that is located on the toe side (lower or lower side) of the slope is defined as the "lower" position.

[0019] A vegetation bag 100 according to one embodiment of the present invention is placed on the ground to be greened, and supplies moisture, fertilizer, and the like to the ground from the vegetation bag 100, thereby assisting the germination and growth of vegetation plants P in the ground. FIG. 1 is a schematic perspective view of the vegetation bag 100. For ease of explanation, a portion of the vegetation bag 100 is cut away. FIG. 2 is a schematic cross-sectional view of the vegetation bag 100. As shown in FIG. 1, the vegetation bag 100 is formed in the shape of a long, thin cylinder. The vegetation bag 100 includes a bag body 101 defining an internal space, and a vegetation material 111 contained in the bag body 101.

[0020] The bag 101 has a bottom wall 102 disposed on the ground side and a top wall 104 disposed above the opposite side of the ground. As shown in FIG. 2, the bag 101 has an oval (or elliptical) cross section. The bottom wall 102 and the top wall 104 are each made of a rectangular flexible sheet extending in the longitudinal direction. The sheet has both widthwise and longitudinal edges (perpendicular to the longitudinal direction) joined (e.g., stitched, welded, or glued) to form a long tube (or bag) shape. The bottom wall 102 has a lower side portion 102a facing the side of the bag 101 and a ground-contact portion 102b facing downward and coming into contact with the ground. The top wall 104 has an upper side portion 104a facing the side of the bag 101. The top wall 104 includes a water-blocking region 105, and the portion of the bag 101 other than the water-blocking region 105 is made of a water-permeable region 103. The bag 101 as a whole is made of a material that can hold the particulate vegetative material 111 inside the bag 101.

[0021] In this embodiment, the bottom wall 102 is formed from a water-permeable sheet that can hold the particulate vegetative material 111 inside the bag 101 and has water permeability (allowing moisture to pass through). In other words, the entire bottom wall 102 forms the water-permeable region 103. For example, the water-permeable sheet may be selected from (without limiting the scope of the present invention) nonwoven fabric, woven fabric, mesh sheet, or a combination thereof. More specifically, the nonwoven fabric and woven fabric may be made from polyester, polyethylene, polypropylene, nylon, polylactic acid, rayon, cotton, or a mixture thereof. Alternatively, when a water-impermeable sheet material such as paper or resin film is selected, water permeability may be ensured by forming a mesh with multiple openings continuously arranged in a planar shape.

[0022] In this embodiment, the top wall 104 is formed from a waterproof sheet that can hold the particulate vegetative material 111 inside the bag 101 and has water-blocking properties (blocking the passage of moisture). In other words, the entire top wall 104 forms the waterproof region 105. It is also preferable that the waterproof region 105 has thermal insulation properties. For example, the waterproof sheet can be selected from (without limiting the present invention) paper, resin film (e.g., polyethylene waterproof laminate sheet), foamed resin sheet, or a combination thereof. In this embodiment, a foamed polyethylene sheet made by closed-cell molding with thermal insulation properties was selected as the material for the waterproof sheet. To achieve a predetermined level of thermal insulation, it is preferable that the foamed polyethylene sheet have a thickness of approximately 0.5 mm or more.

[0023] The vegetative material 111 is filled and held in the internal space of the bag 101. The vegetative material 111 is a material used for vegetation and includes at least one of seeds, fertilizer, soil conditioner, water-retaining material, water-repellent inhibitor, soil, and growth substrate material. As shown in FIG. 2, the vegetative material 111 is tightly packed into the bag 101, causing the bag 101 to expand into an oval shape in cross section. In this embodiment, one longitudinal end of the bag 101 is open, and the vegetative material 111 is filled from the open end. After the vegetative material 111 is filled, the open end is sealed.

[0024] In the vegetation bag 100 of this embodiment, the water-blocking region 105 extends to cover the vegetation material 111 from above. The water-blocking region 105 also extends to the upper side portion 104a of the bag body 101, which faces the side. The water-blocking region 105 covers the upper portion of the vegetation material 111 from both above and the side. The water-blocking region 105 functions to block the passage of running water during rainfall or when the vegetation area is watered, and also to block the passage of water vapor resulting from the evaporation of absorbed water. Furthermore, the water-blocking region 105 has a predetermined insulating property, and therefore is relatively resistant to overheating when heated by direct sunlight, etc. Meanwhile, the water-permeable region 103 extends to the lower side portion 102a of the bag body 101, which faces the side, and also extends across the ground-contact portion 102b. That is, the water-permeable region 103 is formed in a portion of the bag body 101 facing the side. The water-permeable region 103 covers the lower portion of the vegetation material 111 from both the bottom and the sides. When it rains or the vegetation area is watered, the vegetation bag 100 can absorb water into the bag body 101 through the water-permeable region 103 and supply the water to the ground.

[0025] FIG. 3 is a schematic perspective view of a vegetation mat 10 of this embodiment to which multiple vegetation bags 100 are attached. Specifically, the vegetation mat 10 comprises one or more vegetation bags 100 and a water-permeable vegetation sheet 11 that extends lengthwise and widthwise in a flat plane and is laid on the ground. One or more vegetation bags 100 are attached to the vegetation sheet 11. The vegetation sheet 11 comprises a seeded sheet 12 on which vegetation plant seeds are sown, and a mesh sheet 13 attached to the surface of the seeded sheet 12 by any bonding means such as an adhesive. The seeded sheet 12 is composed of a flat, extending sheet body to which multiple seeds are attached. The seeded sheet 12 may be made of paper, woven fabric, or nonwoven fabric. The mesh sheet 13 is used to protect slopes by preventing soil erosion from the slopes.

[0026] The vegetation bag 100 is placed on the surface of the seed-bearing sheet 12 via the mesh sheet 13. The vegetation bag 100 is fixed to the vegetation sheet 11 with pins, anchors, or the like. At this time, the longitudinal direction of the vegetation bag 100 is arranged along the lateral direction of the vegetation sheet 11. This is because when the vegetation mat 10 is installed on a slope, the vegetation bag 100 extends in a direction perpendicular to the inclination direction of the slope, allowing it to more efficiently absorb water running off the slope.

[0027] The characteristics of the vegetation mat 10 can be expressed as follows: The vegetation mat 10 is used for slope greening and comprises a water-permeable vegetation sheet 11 that is laid on the ground extending lengthwise and widthwise in a plane, and vegetation material 111 that is held in a predetermined area on the surface side of the vegetation sheet 11. The vegetation mat 10 is formed with a water-blocking area 105 that is water-blocking and heat-insulating, and a water-permeable area 103 that is water-permeable, and the water-blocking area 105 extends to cover the vegetation material 111 from above.

[0028] An installation structure in which the vegetation bag 100 and the vegetation mat 10 of this embodiment are installed on a slope will be described with reference to Figure 4. In the installation structure, the vegetation mat 10 is arranged so that its longitudinal direction is along the inclination direction of the slope, and is fixed to the slope with anchors or the like. The vegetation bag 100 is attached to the vegetation mat 10 with its longitudinal direction aligned with the lateral direction of the vegetation mat 10, and is therefore arranged along the contour direction of the slope.

[0029] As shown in FIG. 4, when the vegetation bag 100 is installed on a slope, the permeable region 103 faces toward the ground and in the slope direction (near the ground), while the waterproof region 105 faces the opposite direction (upward) of the ground and in the slope direction (away from the ground). That is, the waterproof region 105 covers the vegetation material 111 in the upper half of the interior space of the bag 101 from above and from the sides (in the slope direction or width direction). The waterproof region 105 covers the vegetation material 111 like an umbrella, preventing precipitation from above during rainfall or watering from flowing directly into the interior of the bag 101. Furthermore, slope runoff flowing down the slope is prevented from directly passing through the upper half of the interior space of the bag 101. Meanwhile, slope runoff enters the interior of the vegetation bag 100 via the permeable region 103, which faces laterally near the slope. The moisture is first absorbed by the vegetation material 111 in the lower half of the interior space of the bag body 101 and then gradually permeates into the upper half. For example, on a sunny day after rainfall or watering, the moisture absorbed in the vegetation bag 100 is gradually supplied to the ground via the permeable region 103 to support the growth of vegetation.

[0030] Figure 5(b) shows an installation structure in which a conventional vegetation bag 1 is installed on a slope. In Figure 5(b), the entire bag body 2 of the vegetation bag 1 is made of a water-permeable material. During rainfall or watering, the vegetation material 4 can absorb both precipitation from vertically above and water runoff from the slope through the water-permeable region 3 of the bag body 2. On the other hand, on sunny days after rainfall or watering, the water absorbed in the bag body 2 dissipates into the air as water vapor, which is lighter than air, through the water-permeable region 3. As a result, the vegetation bag 1 quickly dries out, and can only supply moisture to the ground for a short period of time after rainfall or watering. In other words, the conventional vegetation bag 1 does not have sufficient water retention capacity and cannot support the growth of vegetation for a long period of time.

[0031] In contrast, as shown in FIG. 5(a), in the vegetation bag 100 of this embodiment, the water-blocking region 105 extends to cover the vegetation material 111 from above, so that evaporated water (water vapor) remains inside the bag 101 without passing through the top wall 104. In particular, since water vapor is lighter than air, it is thought that it does not actively escape through the water-permeable region 103 formed in the lower half of the bag 101. Furthermore, since the water-blocking region 105 has insulating properties, it effectively suppresses the temperature rise of the vegetation bag 100 due to direct sunlight, etc. As a result, the amount of evaporation of water absorbed in the vegetation bag 100 is reduced. Therefore, the vegetation bag 100 of this embodiment can maintain its water-retaining properties for a longer period of time, thereby more efficiently supporting the growth of vegetation.

[0032] In the above embodiment, the entire top wall 104 forms the water-blocking region 105, which extends to cover the entire vegetative material 111 from above. However, the present invention is not limited to this. In other words, if the water-blocking region extends to cover a portion of the vegetative material from above, the water retention capacity of the vegetation bag can be relatively improved. Preferably, if the water-blocking region is formed over approximately 60% or more of the surface area of ​​the top wall, the amount of water evaporation can be sufficiently reduced.

[0033] The inventors conducted a demonstration test to confirm the effectiveness of the vegetation bags and vegetation mats of the present invention described above. The demonstration test was conducted by forming soil in a tray placed at an angle of approximately 45 degrees to simulate an environment similar to that of a slope, placing vegetation mats consisting of vegetation bags of various shapes attached to vegetation sheets on the soil surface, and observing the results over time. This demonstration test was conducted outdoors in a completely private site where access from outside was prohibited, in a climate suitable for plant growth from late March to late April.

[0034] Figures 6(a) to 6(d) show the schematic configurations of the vegetation bags used in the demonstration tests for Comparative Examples 1 and 2 and Examples 1 and 2. The vegetation bag used in Comparative Example 1 shown in Figure 6(a) was entirely made of a water-permeable sheet (nonwoven fabric). The vegetation bag used in Comparative Example 2 shown in Figure 6(b) had a bottom wall made of a waterproof sheet (polyethylene waterproof laminate sheet) and a top wall made of a waterproof sheet (nonwoven fabric). The vegetation bag used in Example 1 shown in Figure 6(c) had a bottom wall made of a waterproof sheet (nonwoven fabric) and a top wall made of a waterproof sheet (polyethylene waterproof laminate sheet). The vegetation bag used in Example 2 shown in Figure 6(d) had a bottom wall made of a waterproof sheet (nonwoven fabric) and a top wall made of a waterproof sheet (expanded polyethylene sheet) with thermal insulation properties. In the comparative examples and examples, the vegetation material was made of a soil improvement material (perlite). The vegetation sheet consisted of two layers: a seeded sheet and a mesh sheet. For each tray, two vegetation bags were fixed to the vegetation sheet with pins along the width of the vegetation mat.

[0035] The evaluation method was to photograph and observe the germination of seeds from the seed-bearing sheet and the growth of plants four weeks after the installation of the vegetation mat, and visually compare each comparative example and example to rank them in terms of the degree of greening progress. Furthermore, the greening coverage rate was measured based on the proportion of vegetation on the surface of the vegetation sheet through visual observation. Furthermore, the surface temperature of the vegetation bag was measured under conditions of a sunny day (with direct sunlight) at an air temperature of 25.5°C.

[0036] 7(a) to (d) show photographs of the vegetation mats of Comparative Examples 1 and 2 and Examples 1 and 2 four weeks after installation as test results of the demonstration test. The test results are shown in Table 1 below.

[0037] [Table 1]

[0038] More specifically, as shown in FIG. 7(a), the vegetation mat of Comparative Example 1 had the lowest proportion of germinated seeds, a greening coverage rate of 5% or less, and the lowest degree of greening. As shown in FIG. 7(b), the vegetation mat of Comparative Example 2 had a low proportion of germinated seeds, a greening coverage rate of about 5-10%, and a low degree of greening. In other words, the degree of greening in Comparative Example 2 was higher than that in Comparative Example 1. On the other hand, as shown in FIG. 7(c), the vegetation mat of Example 1 had a higher proportion of germinated seeds, a greening coverage rate of about 10-15%, and a relatively high degree of greening. In other words, the degree of greening in Example 1 was higher than that in Comparative Examples 1 and 2. As shown in FIG. 7(d), the vegetation mat of Example 2 had the highest proportion of germinated seeds, a greening coverage rate of about 15-20%, and the highest degree of greening. In other words, the degree of greening in Example 2 was higher than that in Example 1 and Comparative Examples 1 and 2. That is, significant differences were observed between each sample, and the test results showed that the degree of greening progress was highest in Example 2, followed by Example 1, Comparative Example 2, and Comparative Example 1. Furthermore, it was found that the surface temperature of the vegetation bags with a water-permeable top wall (Comparative Examples 1 and 2) was less likely to rise than the bags with a water-shielding area (Examples 1 and 2). On the other hand, it was also found that the rise in surface temperature was slower when the water-shielding area was made insulating (Example 2). From these results, it can be considered that the vegetation mat (or vegetation bag) of Example 2 suppresses the temperature rise of the vegetation bag compared to Example 1, thereby further reducing the amount of water evaporation from the vegetation bag and effectively maintaining the supply of moisture to the ground.

[0039] The above test results demonstrate that the vegetation bags and vegetation mats according to the embodiments of the present invention have a water-blocking area that extends to cover the vegetation material from above, thereby reducing the amount of water that evaporates from the vegetation bags and enabling them to retain water for a longer period of time. Therefore, the vegetation bags and vegetation mats of the present invention have improved water retention and enable more effective greening of the ground.

[0040] Based on the above, the effects of the vegetation bag 100 and the vegetation mat 10 according to one embodiment of the present invention will be described.

[0041] According to the vegetation bag 100 or vegetation mat 10 of this embodiment, the top wall portion 104, which is located on the opposite side of the ground, includes a water-blocking region 105, and the portion other than the water-blocking region 105 is made up of a water-permeable region 103. The water-permeable region 103 allows the vegetation bag 100 to absorb water and supply it to the ground (where vegetation is to be grown). Furthermore, because the water-blocking region 105 extends to cover the vegetation material from above, the amount of water absorbed by the vegetation bag 100 that evaporates is reduced, allowing water to be retained for a longer period of time. Therefore, the vegetation bag 100 and vegetation mat 10 of this embodiment have improved water retention, enabling more effective greening of the ground.

[0042] [Variations] The present invention is not limited to the above-described embodiment, and various modifications are possible. Modifications of the present invention will be described below.

[0043] (1) The vegetation bag of the present invention is not limited to the above embodiment and can take various forms. The vegetation bag 200 shown in Fig. 8 has a top wall 204 composed of two layers: a waterproof layer 204-1 and a heat insulating layer 204-2. For example, the upper layer of the top wall 204 may be a waterproof sheet (e.g., a polyethylene waterproof laminate sheet), and the lower layer may be a foamed resin material that is water-permeable and heat-insulating.

[0044] (2) The vegetation bag of the present invention is not limited to the above embodiment and can take various forms. In the above embodiment, the water-blocking region extends to cover the upper portion of the vegetation material from both above and the sides, but the present invention is not limited to this. In other words, even if the water-blocking region does not cover the upper portion of the vegetation material from the sides, the water-blocking region covers the vegetation material at least from above, thereby reducing the amount of evaporation of absorbed water compared to conventional techniques and achieving relatively advantageous effects.

[0045] (3) The vegetation bag of the present invention is not limited to the above embodiment and can take various forms. While the vegetation bag of the above embodiment is formed in a long cylindrical shape, the shape of the vegetation bag of the present invention is not limited to a long cylindrical shape. For example, the vegetation bag can take any shape, such as a circular or rectangular plate of a predetermined thickness. A vegetation mat can also be formed by connecting vegetation bags together without using a mesh. Alternatively, the vegetation bag can be formed into a single large, flat plate of a predetermined thickness, with multiple partitions provided to prevent the vegetation material from moving inside the bag.

[0046] (4) The vegetation mat of the present invention is not limited to the above embodiment and can take various forms. In the vegetation mat of the above embodiment, vegetation bags are fixed and attached to the surface of the vegetation sheet, but the present invention is not limited to this. Figures 9(a) and 9(b) show a schematic perspective view and a cross-sectional view of a vegetation mat 10' according to a modified example of the present invention. The vegetation mat 10' employs a vegetation sheet 21 having a cylindrical storage section 24 for storing and holding vegetation bags 100. The vegetation sheet 21 includes a seed-bearing sheet 22 and a mesh sheet 23 attached to the surface of the seed-bearing sheet 22. The mesh sheet 23 has multiple locations where the mesh is doubled, and these locations are provided with multiple storage sections 24 extending horizontally in a cylindrical shape. The storage sections 24 are composed of a mesh-like cylindrical body extending longitudinally and are configured to hold vegetation bags 100. Each storage section 24 extends longitudinally across the vegetation sheet 21. More specifically, the mesh-like storage section 24 is composed of multiple warp threads positioned in the vertical direction and weft threads connecting the warp threads. The weft threads are divided into a front and back, and the warp threads are alternately woven horizontally into each of the weft threads to form a tubular shape. In other words, the storage section 24 is formed into a bag-like shape by overlapping two mesh pieces. The storage section 24 may also be formed by combining a coarse-mesh portion 24a and a fine-mesh portion 24b. Preferably, when the vegetation sheet 21 is installed on a slope, the coarse portion 24a is located on the upper side of the slope and the dense portion 24b is located on the lower side of the slope. The storage section 24 extends from one end to the other, with its longitudinal direction aligned with the horizontal direction of the vegetation sheet 21. One or both longitudinal ends of the storage section 24 are open, allowing the tubular vegetation bag 100 to be inserted through the opening. In other words, in this embodiment of the vegetation mat 10', by inserting multiple vegetation bags 100 into multiple storage sections 24, it is possible to easily attach multiple vegetation bags 100 to the vegetation sheet 21 at a predetermined interval.

[0047] (5) The vegetation mat of the present invention is not limited to the above embodiment and can take various forms. In the above embodiment, the vegetation mat has a vegetation sheet and a vegetation bag that are separate and attached to the vegetation sheet. However, the present invention is not limited to this. The vegetation sheet and the vegetation bag may be integrally formed. In this case, the vegetation sheet has a bag-shaped holding portion that holds the vegetation material in a predetermined area on the surface side of the vegetation sheet. A water-blocking area is formed on the top wall of the holding portion and extends to cover the vegetation material from above.

[0048] (6) In the above embodiment, the vegetation bags and vegetation mats are used for greening slopes. However, the vegetation bags and vegetation mats of the present invention may also be used for greening surfaces other than slopes.

[0049] The present invention is not limited to the above-described embodiments, but can be embodied in various forms within the technical scope of the present invention. [Explanation of symbols]

[0050] 10 Vegetation Mat 11 Vegetation Sheet 12 Seed-bearing sheets 13 Mesh sheet 100 vegetation bags 101 Bag body 102 bottom wall 102a Lower side 102b Grounding part 103 Permeable area 104 Top wall 104a Upper side 105 Water-impermeable area 111 Vegetation Materials

Claims

1. A vegetation bag to be placed on the ground to be greened, a bag body having a bottom wall portion disposed on the ground side and a top wall portion disposed above the opposite side of the ground; and a vegetative material contained in the bag, the top wall portion includes a water-blocking region that is water-blocking, and a portion of the bag body other than the water-blocking region includes a water-permeable region that is water-permeable, and the water-blocking region extends so as to cover the vegetative material from above, A vegetation bag characterized in that the water-blocking area is formed by a water-blocking sheet having water-blocking and heat-insulating properties.

2. The vegetation bag according to claim 1, characterized in that the waterproof sheet is made of a foamed resin material.

3. 3. The vegetation bag according to claim 1, wherein the water-blocking area is formed on at least 60% of the surface area of ​​the top wall portion.

4. The vegetation bag according to any one of claims 1 to 3, characterized in that the water-permeable region is formed in a portion of the bag body facing a side.

5. A vegetation mat used for slope greening, One or more vegetation bags according to any one of claims 1 to 4; a water-permeable vegetation sheet extending lengthwise and widthwise in a plane and laid on the ground; A vegetation mat characterized in that the one or more vegetation bags are attached to the vegetation sheet.

6. A vegetation mat used for slope greening, One or more vegetation bags according to any one of claims 1 to 4; a water-permeable vegetation sheet that is laid on the ground and extends vertically and horizontally in a plane; A vegetation mat characterized in that the vegetation sheet and the one or more vegetation bags are integrally formed.

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