Slope protection device, connector, and method for connecting slope protection sheet

Abstract

To provide a slope protection device that facilitates the operation of joining slope protection sheets adjacent to each other.SOLUTION: A slope protection device is provided with one or a plurality of joint tools to join slope protection sheets that are adjacent to each other in overlapping manner. The joint tool is provided with a shaft part extending by a specific length from a head part to a tip part and inserted in an overlapped part from the tip part so as to penetrate the overlapped part of the adjacent slope protection sheets, and one or a plurality of engagement parts projected from the surrounding of the shape part to outside in a radial direction and extending toward the head part from the tip part. When the shaft part penetrates the overlapped part, the engagement part allows movement of the shaft part in an insertion direction and restricts movement of the shaft part in an anti-insertion direction through engagement with the slope protection sheets. A joined state of the slope protection sheets adjacent to each other is maintained through penetration of the shaft part into the overlapped part so that at least one of the engagement parts entirely penetrates the overlapped part in the insertion direction and the axial direction of the shaft part is oriented generally parallel to the slope protection sheets.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a slope protection device that is installed on a slope such as an embankment to protect the slope, a connector for connecting adjacent slope protection sheets, and a method for connecting adjacent slope protection sheets using the connector. [Background technology]

[0002] 2. Description of the Related Art Conventionally, slopes such as embankments have been protected in order to prevent soil erosion, slope collapse, small-scale rockfall, and the like.

[0003] For example, a vegetation mat that holds vegetation materials (or vegetation substrates) such as soil, seeds, fertilizer, and water-retentive materials is fixed to the soil using anchors or the like, thereby protecting the slope while greening it. Patent Document 1 shows a vegetation mat that is laid on the surface of the soil to be greened with natural vegetation plants. In the following paragraph, the reference number of Patent Document 1 is shown in parentheses. The vegetation mat (100) includes a first storage section (102) that stores on-site generated soil (106) including buried seeds (111) corresponding to the natural environment of the soil (P) to be greened, and a second storage section (103) that stores artificial soil (107) at a position different from the first storage section (102). The first and second storage sections (102, 103) are made of a net-like elongated cylinder extending in the longitudinal direction, and are configured to be able to hold a vegetation bag (108) that stores on-site generated soil (106) or artificial soil (107). The vegetation mat (100) is laid on the soil (P) to beautify slopes and the like and to prevent soil erosion and the like. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5981062 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventional vegetation mats (slope protection sheets) such as those in Patent Document 1 could be installed in multiple locations to protect slopes, including slopes, but if adjacent vegetation mats were not connected to each other, gaps would form between the vegetation mats, and these gaps could become the starting point for soil loss and slope collapse. On the other hand, in order to prevent the occurrence of gaps between adjacent vegetation mats, a common method is to connect adjacent vegetation mats by crimping C-rings. However, connecting adjacent vegetation mats requires many C-rings, and the connection work is time-consuming, which is a problem. In particular, a dedicated tool such as a compressor is required to crimp the C-rings, which makes the connection work inefficient.

[0006] The present invention has been made to solve the above-mentioned problems, and its object is to provide a slope protection device, a connector, and a method for connecting adjacent slope protection sheets that make it easier to connect adjacent slope protection sheets. [Means for solving the problem]

[0007] The slope protection device according to claim 1 is a slope protection device for being installed on a slope to protect the slope, Two or more slope protection sheets extending lengthwise and widthwise in a plane and laid on the slope; and one or more connectors for connecting adjacent slope protection sheets by overlapping each other; The connector is The head and A shaft portion that extends a predetermined length from the head portion to the tip portion and is inserted into the overlapping portion of the adjacent slope protection sheets from the tip portion so as to penetrate the overlapping portion of the adjacent slope protection sheets; One or more locking portions protruding radially outward from the periphery of the shaft portion and extending from the tip portion side toward the head portion, the engaging portion is configured to allow the shaft portion to move in the insertion direction when the shaft portion penetrates the overlapping portion, and to restrict the shaft portion from moving in the anti-insertion direction by engaging with the slope protection sheet; The connector is characterized in that the shaft portion penetrates the overlapping portion so that at least one of the one or more engaging portions penetrates the overlapping portion in the insertion direction, and the axial direction of the shaft portion is oriented approximately parallel to the slope protection sheet, thereby maintaining the connection state of the adjacent slope protection sheets by the connector.

[0008] The slope protection device of claim 2 is the slope protection device of claim 1, characterized in that the head protrudes radially outward from the shaft portion so as not to break through the overlapping portion when the shaft portion penetrates the overlapping portion.

[0009] The slope protection device according to claim 3 is the slope protection device according to claim 1 or 2, The shaft portion is minutes It is characterized in that it has a length that penetrates at two or more points.

[0010] The slope protection device of claim 4 is characterized in that, in the slope protection device of claim 3, the multiple engagement portions include a first engagement portion and a second engagement portion formed at different axial positions of the shaft portion, and the first engagement portion and the second engagement portion are arranged facing different radial positions of the shaft portion.

[0011] The slope protection device described in claim 5 is characterized in that, in the slope protection device described in any one of claims 1 to 4, the tip portion is formed in a tapered shape and at least one of the one or more engaging portions is formed at a position adjacent to the tip portion.

[0012] The slope protection device described in claim 6 is characterized in that, in the slope protection device described in any one of claims 1 to 5, the slope protection sheet includes a mesh body formed by weaving net threads vertically and horizontally.

[0013] The slope protection device according to claim 7 is the slope protection device according to claim 6, wherein the slope protection sheet is provided with a storage section that extends in a long cylindrical shape along the lateral direction and is configured to be capable of holding a bag-like or cylindrical bag body containing vegetative material; The storage section is formed by combining a coarse portion having a large mesh and a fine portion having a small mesh, and the coarse portion is Slope Protection Sea T In a plan view, the housing portion is formed so as to be biased toward one end side in a width direction perpendicular to the longitudinal direction of the housing portion, The slope protection sheet is characterized in that, when laid on a slope, it can be laid so that the coarse portion is located on the toe side of the slope and the dense portion is located on the toe side of the slope.

[0014] The connector according to claim 8 is a connector for connecting adjacent slope protection sheets by overlapping each other, The head and A shaft portion that extends a predetermined length from the head portion to the tip portion and is inserted into the overlapping portion of the adjacent slope protection sheets from the tip portion so as to penetrate the overlapping portion of the adjacent slope protection sheets; One or more locking portions protruding radially outward from the periphery of the shaft portion and extending needle-like from the tip portion side toward the head portion side, the engaging portion is configured to allow the shaft portion to move in the insertion direction when the shaft portion penetrates the overlapping portion, and to restrict the shaft portion from moving in the anti-insertion direction by engaging with the slope protection sheet; The present invention is characterized in that the shaft portion penetrates the overlapping portion so that at least one of the one or more engaging portions penetrates the overlapping portion in the insertion direction, and the axial direction of the shaft portion is oriented approximately parallel to the slope protection sheet, thereby making it possible to maintain the connection state of the adjacent slope protection sheets.

[0015] A method according to claim 9 is a method for connecting adjacent slope protection sheets using the connector according to claim 8, comprising the steps of: A step of overlapping adjacent slope protection sheets to form an overlapping portion; Positioning the connector so as to sew the connector to the overlapping portion; The present invention is characterized by comprising: Effect of the Invention

[0016] According to the slope protection device of claim 1, the shaft of the connector is inserted into the overlapping portion of the adjacent slope protection sheets that overlap each other, and the axial direction of the shaft is oriented approximately parallel to the planar direction of the slope protection sheets, so that the connection state of the adjacent slope protection sheets can be easily formed and maintained by the connector. In particular, the connector is inserted into the overlapping portion so that the locking portion penetrates the overlapping portion, and the locking portion can be engaged with the slope protection sheet, so that the connector is prevented from moving in the opposite direction from the overlapping portion and coming out. In other words, the simple work process of inserting the connector into the overlapping portion makes it possible to stably maintain the connection state between adjacent slope protection sheets. Therefore, the slope protection device of the present invention improves the efficiency of the connection work of adjacent slope protection sheets.

[0017] According to the slope protection device of claim 2, in addition to the effect of the invention of claim 1, when the connector is inserted into the overlapping portion, the head of the connector is engaged with the surface of the slope protection sheet so as not to penetrate the overlapping portion. That is, the connector is prevented from falling off the overlapping portion of the slope protection sheet regardless of whether the connector moves in the insertion direction or the anti-insertion direction. This makes it possible for the slope protection device of the present invention to more stably maintain the connection state between adjacent slope protection sheets.

[0018] According to the slope protection device of claim 3, in addition to the effects of the invention of claim 1 or 2, The shaft part overlaps minutes By having a length that penetrates at two or more points, In addition, multiple connection points are formed over the length of the shaft, so that the load is concentrated at one point on the slope protection sheet. This prevents the slope protection sheet from being torn.

[0019] According to the slope protection device of claim 4, in addition to the effect of the invention of claim 3, by changing the radial protruding directions of the first and second locking parts formed at different axial positions of the shaft part, at least one of the locking parts is more reliably caught on the slope protection sheet, and the connector is prevented from falling off from the overlapping part.

[0020] According to the slope protection device of claim 5, in addition to the effects of the invention of any one of claims 1 to 4, the tapered tip makes it easier for the tip to penetrate the overlapping portion. Also, at least one locking portion is formed near the tip, so that as soon as the tip of the connector penetrates the overlapping portion, the locking portion is positioned to penetrate the overlapping portion. In other words, adjacent slope protection sheets can be connected (or temporarily fixed) with fewer insertion operations of the connector.

[0021] According to the slope protection device described in claim 6, in addition to the effects of the invention described in any one of claims 1 to 5, since the slope protection sheet is made of a mesh body formed by weaving mesh threads vertically and horizontally, it is easy to insert the connector through the mesh into the overlapping portion, and it is possible to effectively form a non-slip (locking) state by the locking portion being caught on the mesh threads.

[0022] According to the slope protection device of claim 7, in addition to the effect of the invention of claim 6, by filling the storage section with a bag containing vegetative material, it is possible to effectively protect the slope and green the slope at the same time. Also, the slope protection sheet can be arranged on the slope so that the coarse part of the net-like long cylinder is located on the toe (upper) side of the slope and the dense part of the net-like long cylinder is located on the toe (lower) side of the slope. In other words, since the mesh on the toe side of the slope is coarse, the germination and growth of plants are not hindered by the mesh. On the other hand, since the mesh on the toe side of the slope is fine, it is possible to stably hold the vegetative material. Furthermore, it is possible to capture fine soil flowing down in the dense part of the storage section and reduce the amount of soil runoff.

[0023] According to the connector of claim 8, the shaft of the connector is inserted through the overlapping portion of the adjacent slope protection sheets that overlap each other, and the axial direction is oriented approximately parallel to the planar direction of the slope protection sheets, so that the connector can easily form and maintain the connection state of the adjacent slope protection sheets. In particular, the connector is inserted into the overlapping portion so that the locking portion penetrates the overlapping portion, and the locking portion can be engaged with the slope protection sheet, so that the connector is prevented from moving in the opposite direction from the overlapping portion and coming out. In other words, the simple work process of inserting the connector into the overlapping portion makes it possible to stably maintain the connection state between adjacent slope protection sheets. Therefore, the connector of the present invention is an improved, more efficient connection work of adjacent slope protection sheets.

[0024] According to the method of claim 9, it is possible to achieve the effect of the invention related to the connector of claim 8 as a method for connecting adjacent slope protection sheets. Therefore, the method of the present invention improves the efficiency of the connection work of adjacent slope protection sheets. [Brief description of the drawings]

[0025] [Figure 1] 1 is a schematic exploded perspective view of a slope protection device according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a schematic perspective view of a connector for the slope protection device of FIG. 1 . [Diagram 3] 3A is a plan view, (b) a front view, and (c) a bottom view of the connector of FIG. 2. [Figure 4] 4A is a cross-sectional view taken along line AA of the connector shown in FIG. 3 , and FIG. 4B is a cross-sectional view taken along line BB of the connector shown in FIG. 3 . [Diagram 5] 2 is a partially enlarged perspective view showing a connection state of adjacent slope protection sheets in the slope protection device of FIG. 1. [Figure 6] FIG. 6 is a schematic plan view showing the slope protection device of FIG. 5 . [Figure 7] Schematic cross-sectional view of the slope protection device shown in Figure 6 [Figure 8] 2 is a schematic diagram showing a process of connecting adjacent slope protection sheets using a connector in the slope protection device of FIG. 1. [Figure 9] 2A to 2C are schematic diagrams showing different connection states of adjacent slope protection sheets in the slope protection device of Figure 1, showing (a) a connection state with one penetration point, (b) a connection state with two penetration points, and (c) a connection state with three penetration points. [Figure 10] FIG. 2 is a schematic diagram showing an installation structure of the slope protection device of FIG. 1. [Figure 11] 1 is a schematic diagram showing an application example of a slope protection sheet of a slope protection device of the present invention. FIG. [Figure 12] FIG. 4 is a schematic diagram showing another application example of the slope protection sheet of the slope protection device of the present invention. [Figure 13] FIG. 13 is a diagram showing a modified example of a connector for a slope protection device according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the shapes of the figures referred to in the following description are conceptual or schematic diagrams for explaining preferred shapes and dimensions, and the dimensional ratios do not necessarily match the actual dimensional ratios. In other words, the present invention is not limited to the dimensional ratios in the drawings.

[0027] The slope protection device 100 of one embodiment of the present invention is installed on a slope such as a sloping face, and is intended to protect the slope by preventing soil outflow and rockfall. In this specification, the direction along the inclination direction of the slope when the slope protection device 100 is laid on the slope is defined as the "vertical" direction, and the direction along the contour line direction of the slope is defined as the "horizontal" direction. Furthermore, the side of the slope protection device 100 that is placed on the toe side (upper or higher side) of the slope when laid on the slope is defined as the "upper" position, and the side that is placed on the toe side (lower or lower side) of the slope is defined as the "lower" position.

[0028] Fig. 1 is a schematic exploded perspective view of a slope protection device 100 of this embodiment. As shown in Fig. 1, the slope protection device 100 comprises two or more slope protection sheets 101 extending vertically and horizontally in a predetermined size so as to cover the slope surface to be protected, and (one or) multiple connectors 110 for connecting adjacent slope protection sheets 101 by overlapping each other. The slope protection device 100 may also comprise, as a component, one or multiple fasteners 120 for fixing the slope protection sheets 101 to the slope (see Fig. 10). That is, the slope protection device 100 is configured to protect a slope of a predetermined area by using multiple slope protection sheets 101 smaller than the area of ​​the protection region of the slope.

[0029] The slope protection sheet 101 is laid on a slope to suppress soil erosion from the slope, the collapse of the slope, and small-scale rockfall. The slope protection sheet 101 may take various forms as long as it suppresses soil erosion and the like. Here, for convenience of explanation or as one of the preferred forms, the slope protection sheet 101 is represented as a rectangular mesh (or net) formed by weaving net threads 102 lengthwise and crosswise. In this embodiment, the mesh is made of flexible and high-strength fibers. In addition, one surface of the slope protection sheet 101 is defined as a first surface 101a, and the surface opposite to the first surface 101a is defined as a second surface 101b.

[0030] Two or more slope protection sheets 101 are disposed adjacent to each other in the vertical or horizontal direction, and are disposed so as to partially overlap each other so as not to form gaps (see FIG. 10). An overlapping portion S is formed by two adjacent slope protection sheets 101, 101. A connector 110 penetrates the overlapping portion S along the planar direction of the slope protection sheet 101, so that a connection state between the two adjacent slope protection sheets 101, 101 can be formed and maintained.

[0031] The configuration of the connector 110 will be described with reference to Fig. 2 to Fig. 4. Fig. 2 is a schematic perspective view of the connector 110. Figs. 3(a) to (c) are a plan view, a front view, and a bottom view of the connector 110. Figs. 4(a) and (b) are an AA cross-sectional view and a BB cross-sectional view of the connector 110.

[0032] The connector 110 of this embodiment includes a head 111, a shaft 112 that extends from the head 111 to a tip 113 by a predetermined length and can penetrate the overlapping portion S of the slope protection sheet 101, and one or more locking portions 115 that extend radially outward from the periphery of the shaft 112 in a needle or rod shape. Here, the direction from the head 111 to the tip 113 is determined as the insertion direction of the connector 110, and the (opposite) direction from the tip 113 to the head 111 is determined as the counter-insertion direction (or withdrawal direction) of the connector 110. That is, the connector 110 is inserted into the overlapping portion S of the slope protection sheet 101 from the tip 113 along the insertion direction. The connector 110 of this embodiment can be formed from a hard synthetic resin material or a metal material.

[0033] The head 111 is provided at the base end of the shaft 112, and protrudes radially outward from the shaft 112. The amount of protrusion of the head 111 is determined so that the shaft 112 does not penetrate the overlapping portion S when it penetrates the overlapping portion S. Preferably, the head 111 is larger than the mesh of the slope protection sheet 101.

[0034] The shaft portion 112 extends with a predetermined length and diameter, and is configured to be inserted from the tip portion 113 into the overlapping portion S so as to penetrate the overlapping portion S of the adjacent slope protection sheet 101. As shown in FIG. 4, the shaft portion 112 extends from the base end on the head 111 side to the vicinity of the tip portion 113 in a cross-sectional circular shape with a substantially uniform diameter, and has a tapered shape at the tip portion 113. Since the tip portion 113 is sharp, it becomes easy for the tip portion 113 to penetrate the slope protection sheet 101 or the overlapping portion S. The length of the shaft portion 112 is determined to be at least larger than the mesh of the slope protection sheet 101. In addition, it is preferable that the shaft portion 112 has a length that penetrates the overlapping portion S at two or more places. Furthermore, it is more preferable that the shaft portion 112 has a length that penetrates the overlapping portion S at three to five places.

[0035] The locking portion 115 is a long and thin protruding piece that protrudes radially outward from the periphery of the shaft portion 112 and extends from the tip portion 113 side toward the head portion 111 side. In other words, the locking portion 115 extends by folding back in the opposite direction to the insertion direction, and its tip is thin, functioning as a so-called "barb". Each locking portion 115 is configured to allow the shaft portion 112 to move in the insertion direction when the shaft portion 112 penetrates the overlapping portion S, and to restrict the movement of the shaft portion 112 in the reverse insertion direction by engaging with the slope protection sheet 101. In other words, the locking portion 115 itself can pass through the overlapping portion S in the insertion direction according to the movement of the shaft portion 112 in the insertion direction. On the other hand, the locking portion 115 cannot pass through the overlapping portion S in the reverse insertion direction when the shaft portion 112 moves in the reverse insertion direction because it is locked by the slope protection sheet 101.

[0036] More specifically, the base end of each locking portion 115 is integrally formed on the outer circumferential surface of the shaft portion 112, and the tip thereof faces radially outward and toward the side opposite to the insertion direction. That is, the locking portion 115 extends at a predetermined inclination angle with respect to the axial direction of the shaft portion 112. This inclination angle forms an acute angle toward the head portion 111 side. Also, the locking portion 115 has a sharp tip and extends so as to be curved back radially outward. A gap is formed between the tip of the locking portion 115 and the outer circumferential surface of the shaft portion 112. The net thread 102 of the slope protection sheet 101 passes through the gap, so that the locking portion 115 is configured to engage with the slope protection sheet 101. That is, the locking portion 115 has a shape in which the net thread 102 of the slope protection sheet 101 is hooked. Furthermore, each locking portion 115 may be configured to be elastically deformable radially inward of the shaft portion 112. When the shaft portion 112 penetrates the slope protection sheet 101, if the through hole (or mesh) is narrow, the engagement portion 115 elastically deforms radially inward, allowing the shaft portion 112 to penetrate through the slope protection sheet 101 together with the shaft portion 112.

[0037] In addition, a plurality of locking portions 115 are formed at different positions in the axial direction of the shaft portion 112. In this embodiment, the locking portions 115 are formed at two positions on the shaft portion 112. A first locking portion 115 of the plurality of locking portions 115 is formed at a position adjacent to the tip portion 113. Since the first locking portion 115 is formed near the tip portion 113, the first locking portion 115 is disposed by penetrating the overlapping portion S as soon as the tip portion 113 and its vicinity of the connector 110 penetrate the overlapping portion S. That is, the adjacent slope protection sheets 101, 101 can be connected (or temporarily fixed) with a small insertion operation of the connector 110. In addition, a second locking portion 115 is formed at a substantially central position of the shaft portion 112 axially separated from the first locking portion 115. That is, in this embodiment, the connector 110 can engage with the slope protection sheet 101 at two locations spaced apart in the axial direction by the two locking portions 115. The first locking portion 115 and the second locking portion 155 are arranged facing different radial positions (opposite sides in this case) of the shaft portion 112. In this way, by making the radial protruding directions of the multiple locking portions 115 different, at least one locking portion 115 is more reliably caught on the slope protection sheet 101, and the connector 110 is prevented from falling off the overlapping portion S.

[0038] Next, a configuration in which adjacent overlapping slope protection sheets 101, 101 are connected using a plurality of connectors 110 will be described. Fig. 5 is a schematic perspective view showing the connected state of adjacent slope protection sheets 101, 101 in the slope protection device 100. Fig. 6 is a schematic plan view thereof. Fig. 7 is a schematic CC cross-sectional view thereof.

[0039] As shown in Figures 5 and 6, the edges of adjacent slope protection sheets 101, 101 partially overlap to form an overlapping portion S. At this time, it is preferable that adjacent slope protection sheets 101, 101 are arranged in parallel so that the overlapping portion S has a uniform width. Then, a plurality of connectors 110 are sewn to the overlapping portion S so as to be approximately parallel to the planar direction of the slope protection sheet 101. Here, the first surface 101a of the slope protection sheet 101 is located on the upper side, and the second surface 101b is located on the lower side.

[0040] As shown in Fig. 7, each connector 110 connects adjacent slope protection sheets 101, 101 by penetrating the overlapping portion S at two or more points. Here, the head 111 of the connector 110 is located on the first surface 101a side, the shaft 112 penetrates the overlapping portion S at five points, and the tip 113 extends to the second surface 101b side. The shaft 112 is oriented approximately parallel to the plane of the slope protection sheet 101, and is alternately arranged on the first surface 101a side and the second surface 101b side of the overlapping portion S in the axial direction. In other words, the overlapping portion S is deformed so as to meander with respect to the connector 110. The shaft portion 112 penetrates the overlapping portion S so that the multiple engagement portions 115 penetrate the overlapping portion S in the insertion direction, and the axial direction of the shaft portion 112 is oriented approximately parallel to the slope protection sheet 101 (planar direction), thereby forming and maintaining a connection state of adjacent slope protection sheets 101, 101 by the connecting device 110.

[0041] More specifically, the first penetration point on the most proximal side of the connector 110 is indicated as P1, and the nth penetration point is indicated as P2 to P5 (i.e., Pn is the nth penetration point) in order from the proximal side. In this embodiment, the penetration points P1 to P5 are positions where the mesh openings of the two slope protection sheets 101 overlap in the overlapping portion S. In addition, one or more net threads 102 forming the mesh are arranged between the adjacent penetration points Pn and Pn+1. In addition, the head 111 of the connector 110 is arranged on the axial tip side of the first penetration point P1, and the tip 113 is arranged to penetrate through to the tip side of the fifth penetration point P5. Here, the head 111 is hooked and locked by the net thread 102, and therefore cannot pass through the first penetration point P1 in the insertion direction with the shaft 112 oriented parallel to the plane of the slope protection sheet 101.

[0042] Similarly to the tip 113 of the connector 110, the first locking portion 115 is disposed penetrating the fifth piercing point P5 toward the tip side. When the shaft 112 moves in the counter-insertion direction (toward the base end), the first locking portion 115 hooks onto the net thread 102 located at the tip side of the fifth piercing point P5, thereby functioning as a retainer (or barb). Even if the first locking portion 115 passes through the fifth piercing point P5 in the counter-insertion direction without being hooked onto the net thread 102, it is highly likely that it will be locked by another net thread 102 on the base end side, and it is almost impossible for it to pass through all other piercing points P in the counter-insertion direction.

[0043] The second locking portion 115 is disposed between the third through-point P3 and the fourth through-point P4. Similarly, when the shaft portion 112 moves in the direction opposite to the insertion direction (toward the base end), the second locking portion 115 hooks with the net thread 102 located at the tip side of the third through-point P3 (or a more base end side through-point), thereby functioning as a retainer (or a barb). That is, the second locking portion 115 can engage with a mesh at a position different from the mesh with which the first locking portion 115 engages with the slope protection sheet 101. Furthermore, the net thread 102 is entangled with the shaft portion 112 at multiple positions before and after each of the through-points P1 to P5 in the axial direction. That is, the shaft portion 112 is sandwiched by the net thread 102 from both the first surface 101a side and the second surface 101b side. In other words, the mesh threads 102 of adjacent slope protection sheets 101, 101 are entangled and connected to each other around the connecting device 110, and the connecting device 110 is prevented from moving in both the insertion direction and the anti-insertion direction within the overlapping portion S and falling off.

[0044] Therefore, according to the slope protection device 100 of this embodiment, in the connected state of adjacent slope protection sheets 101, 101, a plurality of connection points are formed over the length range of the shaft portion 112 (having a length that penetrates the overlapping portion S at two or more points) for one connector 110, and the slope protection sheet 101 (or the net thread 102) is prevented from being torn due to the load being concentrated at one point of the slope protection sheet 101. In the conventional connection using a C-ring, the load is concentrated at one point of the connection point of the vegetation mat, so that the vegetation mat is easily damaged around the connection point over time, and the connection state cannot be stably maintained, which is a second problem. In contrast, the slope protection device 100 of this embodiment uses the connector 110 to stably maintain the connection state of adjacent slope protection sheets 101, 101.

[0045] Next, a method for connecting adjacent slope protection sheets 101, 101 will be described with reference to FIG.

[0046] First, adjacent slope protection sheets 101, 101 are arranged to overlap each other to form an overlapping portion S. Next, the connector 110 is arranged so as to be sewn to the overlapping portion S. More specifically, as shown in FIG. 8(a), the overlapping portion S is folded, and the connector 110 is oriented approximately parallel to the planar direction of the slope protection sheet 101, while its tip 113 is inserted into the opening (first penetration point P1) of the mesh of the folded overlapping portion S, and the shaft 112 is arranged to penetrate the overlapping portion S. At this time, the head 111 of the connector 110 is located on the first surface 101a side of the overlapping portion S through the first penetration point P1, and the tip 113 is located on the second surface 101b side.

[0047] Next, the overlapping portion S in front of the insertion direction is folded again, and the connector 110 is moved in the insertion direction while being oriented approximately parallel to the planar direction of the slope protection sheet 101. As shown in FIG. 8(b), the tip 113 of the shaft portion 112 is inserted into a mesh (second penetration portion P2) different from the first penetration portion P1, and is disposed to penetrate the overlapping portion S from the second surface 101b side to the first surface 101a side. As shown in FIG. 8(c), by repeating this penetration operation and moving the connector 110 in the insertion direction, it is possible to form multiple penetration portions Pn in sequence and connect adjacent slope protection sheets 101, 101. Therefore, the slope protection device 100 of this embodiment can establish a stable connection state between adjacent slope protection sheets 101, 101 by a simple operation of inserting the connector 110 approximately parallel to the overlapping portion S.

[0048] 9(a)-(c) show a connection state in which there is one through-point P, a connection state in which there are two through-points P, and a connection state in which there are three through-points P in the adjacent slope protection sheets 101, 101 of the slope protection device 100. As shown in FIG. 9(a) and FIG. 9(b), in the present invention, it is possible to fix the connector 110 by passing it through the slope protection sheet 101 once or twice, but the connection strength is not sufficient. On the other hand, in consideration of workability, it is preferable that the number of times the connector 110 is passed through the slope protection sheet 101 is 10 times or less. Therefore, in consideration of both workability and connection strength, the number of times the connector 110 is passed through the slope protection sheet 101 is preferably about 3 to 5 times, as shown in FIG. 7 and FIG. 9(c).

[0049] Next, an installation structure 10 in which the slope protection device 100 of this embodiment is laid on the soil surface of a slope G will be described. FIG.

[0050] In the installation structure 10 shown in FIG. 10, a plurality of slope protection sheets 101 of the slope protection device 100 are fixed to the soil surface of the slope G using a plurality of fasteners 120. The plurality of slope protection sheets 101 are laid out in the inclination direction of the slope G and in the contour direction perpendicular thereto. In particular, adjacent slope protection sheets 101, 101 overlap each other, so that no gaps are formed on the slope G. Here, the slope protection sheets 101 are adjacent to each other in the vertical and horizontal directions, and overlapping portions S are formed both vertically and horizontally. In addition, the fasteners 120 are L-shaped anchors, and are preferably driven into the overlapping portions S with their heads facing the slope toe side. In the overlapping portions S, a plurality of connectors 110 are attached so as to extend substantially parallel to the planar direction of the slope protection sheets 101, so that the adjacent slope protection sheets 101, 101 are firmly connected to each other. That is, the installation structure 10 of this embodiment can stably maintain the connection state of adjacent slope protection sheets 101, 101 by the connector 110, thereby preventing subsequent occurrence of gaps. As a result, it is possible to effectively protect the slope G by preventing soil loss, etc., caused by the subsequent occurrence of the gaps.

[0051] In this embodiment, although it is not intended to limit the present invention, the length of the connector 110 is about 150 mm, and multiple connectors 110 are attached to the overlapping portion S at intervals of about 500 mm in the vertical or horizontal direction of the slope G. In addition, although the connection of adjacent slope protection sheets 101, 101 is possible with at least one connector 110 for one overlapping portion S, it is preferable to attach multiple connectors 110 at a predetermined interval in order to improve the connection strength.

[0052] In the above embodiment, the slope protection sheet 101 is shown as a simple mesh-like body, but the slope protection sheet may take various forms. Specific examples of the slope protection sheet will be described below.

[0053] FIG. 11 shows a slope protection sheet 201, which is a vegetation mat, as an example of the slope protection sheet of the slope protection device. The slope protection sheet 201 is made of a net-like body formed by weaving net threads 202 vertically and horizontally at approximately right angles. The slope protection sheet 201 has a plurality of places where the net-like body is doubled, and a plurality of storage sections 204 extending in a long cylindrical shape in the horizontal direction are provided at the respective places. The slope protection sheet 201 can also be used as a vegetation mat for greening the slope surface with vegetation plants by filling the storage sections 204 with bags 205 containing vegetation materials. The vegetation materials are materials used for vegetation, and include at least one of seeds, fertilizers, soil improvement materials, water retention materials, water repellency suppression materials, soil and sand, and growth base materials.

[0054] The storage section 204 is composed of a net-like long cylinder extending in the longitudinal direction, and is configured to hold a bag-like or tubular bag body 205 containing vegetative material. Each storage section 204 extends longitudinally across the lateral direction of the slope protection sheet 201. More specifically, the net-like storage section 204 is composed of a plurality of warps located in the longitudinal direction and weft threads connecting the warps, and is formed into a tube by dividing the weft threads into front and back and weaving each warp thread alternately in the lateral direction into each of the weft threads. In other words, the storage section 204 is formed into a bag shape in which two net-like bodies are overlapped. The storage section 204 extends from one end to the other end so that its longitudinal direction is along the lateral direction of the slope protection sheet 201. One or both ends of the longitudinal end of the storage section 204 are open, and the tubular bag body 205 can be inserted through the opening.

[0055] The storage section 204 is formed by combining the coarse part 204a with a coarse mesh and the dense part 204b with a fine mesh. The coarse part 204a and the dense part 204b are defined as areas in which the mesh size is relatively different in both the vertical and horizontal directions or in either direction. The coarse part 204a is formed biased toward one end side in the width direction perpendicular to the longitudinal direction of the storage section 204 in a plan view. In particular, the coarse part 204a occupies approximately the upper half of the vertical direction in the plane, and the dense part 204b occupies the remaining approximately lower half. When the slope protection sheet 201 is installed on a slope, the coarse part 204a, which occupies a part of the outer periphery of the storage section 204, is located on the upper side of the slope, and the dense part 204b, which occupies the remaining outer periphery of the storage section 204, is located on the lower side of the slope. In other words, since the mesh on the slope side of the storage section 204 is coarse, the germination and growth of plants are not hindered by the mesh body. On the other hand, since the mesh on the toe side of the slope of the storage section 204 is fine, it is possible to stably hold the vegetative material. Furthermore, it is possible to capture fine soil and sand that flows down in the dense section 204b of the storage section 204, thereby reducing the amount of soil and sand that flows out.

[0056] 12, a vegetative sheet 206 made of nonwoven fabric, paper, woven fabric, or the like may be attached to the slope protection sheet 201. The vegetative sheet 206 is made by sandwiching seeds or fertilizer between a water-degradable (water-soluble, water-labile) nonwoven fabric and paper and adhering them, thereby adding a function as a vegetative sheet to the slope protection sheet 201.

[0057] To connect adjacent slope protection sheets 201, 201, the bag body 205 is stored in the storage section 204 in advance, and the edges of the slope protection sheets 201, 201 are overlapped to form an overlapping portion S. Then, as described above, the connector 110 is attached to the overlapping portion S as if sewn, thereby forming and maintaining a connected state. In this embodiment, it is preferable that the connector 110 is attached to the rough portion 204a of the storage section 204 from the viewpoint of ease of attachment.

[0058] In other words, by combining the connector 110 with a slope protection sheet 201 having the function of a vegetation mat as shown in Figures 11 and 12, it is possible to protect the slope as a slope protection device while greening the slope with plants.

[0059] The effects of the slope protection device 100 according to one embodiment of the present invention will now be described.

[0060] According to the slope protection device 100 of this embodiment, the shaft portion 112 of the connector 110 is inserted through the overlapping portion S of the adjacent slope protection sheets 101, 101 that overlap each other, and the axial direction is oriented approximately parallel to the planar direction of the slope protection sheet 101, so that the connection state of the adjacent slope protection sheets 101, 101 can be easily formed and maintained by the connector 110. In particular, the connector 110 is inserted into the overlapping portion S so that the locking portion 115 penetrates the overlapping portion S, and the locking portion 115 can be engaged with the slope protection sheet 101, so that the connector 110 is prevented from moving in the opposite insertion direction from the overlapping portion S and coming out. In addition, the head 111 of the connector 110 does not penetrate the overlapping portion S in the insertion direction. In other words, the connection state between the adjacent slope protection sheets 101, 101 can be stably maintained by the simple operation process of inserting the connector 110 into the overlapping portion S. Therefore, the slope protection device 100 of this embodiment improves the efficiency of the connection work of adjacent slope protection sheets 101, 101.

[0061] 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.

[0062] (1) The connector of the present invention is not limited to the above embodiment and may take various forms. FIG. 13 illustrates connectors 210 and 310 as modified examples of the present invention. The connector 210 shown in FIG. 13(a) includes a head 211, a shaft 212, a tip 213, and a locking portion 215. The head 211 is bent from the base end of the shaft 212 into a substantially L-shape and protrudes radially outward from the shaft 212 so as not to penetrate the overlapping portion. In addition, two locking portions 215 are formed at the same axial position of the shaft 212. The two locking portions 215 extend radially opposite to each other, but may extend in a direction intersecting or perpendicular to the radial direction. Similarly, two locking portions 215 are formed at different axial positions of the shaft 212. The connector 310 shown in FIG. 13(b) includes a head 311, a shaft 312, a tip 313, and a locking portion 315. Head 311 is enlarged in diameter relative to shaft 312, and protrudes radially outward from shaft 312 so as not to penetrate the overlapping portion. Shank 312 is configured to taper continuously from head 311 to tip 313. That is, shaft 312 does not have a uniform diameter. Tip 313 of shaft 312 is not sharp. Only one locking portion 315 is formed on shaft 312. That is, the connector of the present invention may take any form as long as it can at least function as a slope protection device.

[0063] (2) The slope protection device of the present invention is not limited to the above embodiment and may take various forms. In the slope protection device of the above embodiment, the slope protection sheet is formed as a mesh body, but the present invention is not limited to this. For example, the slope protection sheet may be composed of a nonwoven fabric or a woven fabric sheet. In this case, by piercing the connecting tool into the slope protection sheet, the tip part penetrates the fiber mesh to form a through hole, and the shaft part can be inserted through the overlapping part while pushing and widening the through hole. When the locking part passes through the through hole together with the shaft part, it elastically deforms radially inward, and after passing through the through hole, it elastically returns to its original state, making it possible to engage with the slope protection sheet in the reverse insertion direction, thereby exerting a similar anti-dislodgement effect.

[0064] (3) The slope protection device of the present invention is not limited to the above embodiment and may take various forms. In the above embodiment, the slope protection sheet is made of a flexible material such as a mesh, but the present invention is not limited to this. For example, the slope protection sheet may be made of a wire mesh or a synthetic resin net (Netron (registered trademark) sheet), which has higher strength and durability than a mesh formed by weaving fibers or threads.

[0065] (4) The slope protection device of the present invention is not limited to the above embodiment and may take various forms. In the above embodiment of the slope protection device, the slope protection sheet is formed as a rectangular sheet, and the edges of the sheets are overlapped to form an overlapping portion, but the present invention is not limited to this. For example, in order to overlap adjacent slope protection sheets, a portion protruding from the edge of the rectangular sheet may be provided as a connecting portion.

[0066] It should be noted that the present invention is not limited to the above-described embodiments, but may be embodied in various forms within the technical scope of the present invention. [Explanation of symbols]

[0067] 10 Installation structure 100 Slope protection device 101 Slope protection sheet 101a 1st surface 101b 2nd surface 102 Netting 110 Connector 111 Head 112 Shaft 113 Tip 115 Locking part 120 Fixtures 201 Slope protection sheet 201a 1st surface 201b 2nd surface 202 Netting 204 Storage Unit 204a Rough part 204b Secret area 205 Bag body 206 Vegetation Sheet Pn nth penetration point S polymerization part G. Slope

Claims

1. A slope protection device for being installed on a slope to protect the slope, comprising: Two or more slope protection sheets extending lengthwise and widthwise in a plane and laid on the slope; and one or more connectors for connecting adjacent slope protection sheets by overlapping each other; The connector is The head and A shaft portion that extends a predetermined length from the head portion to the tip portion and is inserted into the overlapping portion of the adjacent slope protection sheets from the tip portion so as to penetrate the overlapping portion of the adjacent slope protection sheets; One or more locking portions protruding radially outward from the periphery of the shaft portion and extending from the tip portion side toward the head portion, the engaging portion is configured to allow the shaft portion to move in the insertion direction when the shaft portion penetrates the overlapping portion, and to restrict the shaft portion from moving in the anti-insertion direction by engaging with the slope protection sheet; A slope protection device characterized in that the shaft portion penetrates the overlapping portion so that at least one of the one or more engaging portions penetrates the overlapping portion in the insertion direction, and the axial direction of the shaft portion is oriented approximately parallel to the slope protection sheet, thereby maintaining the connection state of the adjacent slope protection sheets by the connecting device.

2. 2. The slope protection device according to claim 1, wherein the head portion projects radially outwardly from the shaft portion so as not to break through the overlapping portion when the shaft portion penetrates the overlapping portion.

3. 3. The slope protection device according to claim 1, wherein the shaft portion has a length that penetrates the overlapping portion at two or more points.

4. The slope protection device according to claim 3, characterized in that the multiple engagement portions include a first engagement portion and a second engagement portion formed at different axial positions of the shaft portion, and the first engagement portion and the second engagement portion are arranged facing different radial positions of the shaft portion.

5. A slope protection device as described in any one of claims 1 to 4, characterized in that the tip portion is formed in a tapered shape, and at least one of the one or more engaging portions is formed at a position adjacent to the tip portion.

6. 6. The slope protection device according to claim 1, wherein the slope protection sheet includes a net-like body formed by weaving net threads lengthwise and crosswise.

7. The slope protection sheet is provided with a storage section that extends in a long cylindrical shape along the lateral direction and is configured to hold a bag-shaped or cylindrical bag body containing vegetative material; The storage section is formed by combining a coarse portion having a large mesh and a fine portion having a small mesh, and the coarse portion is formed biased toward one end side in a width direction perpendicular to the longitudinal direction of the storage section in a plan view of the slope protection sheet, The slope protection device according to claim 6, characterized in that, when laid on the slope, the slope protection sheet can be laid so that the coarse portion is located on the toe side of the slope and the dense portion is located on the toe side of the slope.

8. A connector for connecting adjacent slope protection sheets by overlapping each other, The head and A shaft portion that extends a predetermined length from the head portion to the tip portion and is inserted into the overlapping portion of the adjacent slope protection sheets from the tip portion so as to penetrate the overlapping portion of the adjacent slope protection sheets; One or more locking portions protruding radially outward from the periphery of the shaft portion and extending needle-like from the tip portion side toward the head portion, the engaging portion is configured to allow the shaft portion to move in the insertion direction when the shaft portion penetrates the overlapping portion, and to restrict the shaft portion from moving in the anti-insertion direction by engaging with the slope protection sheet; A connector characterized in that the shaft portion penetrates the overlapping portion so that at least one of the one or more engaging portions penetrates the overlapping portion in the insertion direction, and the axial direction of the shaft portion is oriented approximately parallel to the slope protection sheet, thereby enabling the connection state of the adjacent slope protection sheets to be maintained.

9. A method for connecting adjacent slope protection sheets using the connector according to claim 8, comprising the steps of: A step of overlapping adjacent slope protection sheets to form an overlapping portion; and positioning the connector so as to sew the connector to the overlapping portion.

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