Protective fence

Abstract

To provide a protective fence having a blocking surface with a small bending deformation amount while allowing the passage of collapsed objects when struck.SOLUTION: In a protective fence having a plurality of posts and a blocking surface provided between above-ground parts of adjacent posts, a highly rigid, transparent blocking surface is formed between the above-ground parts of adjacent posts, and the rigid blocking surface captures collapsing objects while allowing some of the collapsing objects to pass through horizontal slits opened in the rigid blocking surface.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a protective fence for capturing falling objects such as collapsed soil, avalanches, and falling rocks. [Background technology]

[0002] Patent Document 1 discloses a protective fence against collapsed soil and sand, which includes a plurality of posts and a protective net made of rope that is stretched horizontally between adjacent posts. This protective fence is designed to trap the soil while absorbing the impact force of collapsing soil through the flexural deformation of the protective net.

[0003] Patent Document 2 discloses a protective fence that enhances the capture of collapsed soil in the lower half of the protective surface. This protective fence is constructed by setting up a strip-shaped concrete wall on the ground, with the lower parts of the posts penetrating this wall and also penetrating into the ground, and attaching a protective net to the above-ground parts of the posts that protrude upward from the wall. This protective fence has a wall formed in the lower half of the protective surface that receives and captures collapsing soil and sand, with the posts functioning as support piles. Furthermore, a protective net is formed on the upper half of the protective surface to capture falling rocks and the like.

[0004] Patent Document 3 discloses that a wall is constructed from a plurality of earth block blocks. The soil block is a cubic soil mass made by filling a bag with a filling material such as soil or sand. The construction method involves piling up multiple earthen blocks on the ground to form a wall, then erecting the supports by penetrating the lower parts of the supports through the multiple earthen blocks and into the ground, and attaching a protective net to the above-ground parts of the supports that protrude upward from the wall. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2022-105948 A [Patent Document 2] JP 2014-101699 A [Patent Document 3] JP 2008-121264 A Summary of the Invention [Problem to be solved by the invention]

[0006] The protective fence equipped with a rope protective net has the following points that need to be improved: <1> When capturing collapsed soil and sand, the rope protective net is subject to large bending deformation toward the valley side of the slope. Therefore, if there are roads, railways, houses, or other objects to be protected nearby, protective fences must be installed at a distance from the objects to be protected. <2> It will be necessary to secure land that covers the range of deformation of the protective net, which will increase the cost of acquiring the land. <3> In cases where it is difficult to secure land, including the deformation area of ​​the protective net, the installation of a protective fence equipped with a rope protective net will be postponed.

[0007] The following points need to be improved in protective fences equipped with walls: <1> In order to build a concrete wall, heavy machinery must be used, resulting in high construction costs. <2> At construction sites where the surface on which the wall is to be installed has a slope or an uneven incline, the concrete wall cannot follow the slope or incline of the installation surface. Therefore, the installation surface needs to be leveled and flat, which means that construction of the wall requires a lot of time and effort. <3> Because the wall has a waterproof function, there are problems such as large amounts of water accumulating at the base of the protective fence and difficulty in discharging the captured soil and sand. <4> Because the walls are made of concrete, if they are cracked or damaged by an attack, the cost of replacing them will be high.

[0008] The object of the present invention has been made in consideration of the above-mentioned problems, and its objective is to provide a protective fence that has a blocking surface with a small amount of bending deformation while allowing falling debris to pass through when hit. A further object of the present invention is to provide a safety fence capable of solving the problems mentioned above. [Means for solving the problem]

[0009] The present invention is a protective fence which comprises a number of posts which are erected with their buried parts buried at intervals into the installation surface, and a blocking surface provided between the above-ground parts of adjacent posts, and which captures falling material through the blocking surface, wherein a rigid blocking surface is provided between the above-ground parts of the adjacent posts, and a horizontal slit is provided in the rigid blocking surface to allow some of the falling material to pass through, forming a transparent rigid blocking surface. In another embodiment of the present invention, the transmission type rigid blocking surface is constructed of a plurality of cross beams, and a continuous band surface is formed on the side surface of the cross beams. In another embodiment of the present invention, a connecting device is rotatably mounted on the ground portion of the support pillar, and the connecting device and the end of the cross beam are pivotally supported by a horizontal support shaft to form a pin connection. In another embodiment of the present invention, the plurality of cross beams may be detachably installed between the above-ground portions of adjacent posts. In another embodiment of the invention, the cross beam is made of concrete filled steel tube. In another aspect of the invention, a plastic blocking surface may be formed above the rigid blocking surface of the transmission mold. In another embodiment of the invention, the plastic blocking surface is a protective net made of rope or net or a combination of rope and net. Effect of the Invention

[0010] The present invention has at least one of the following advantages. <1> By installing multiple cross beams at intervals between the above-ground portions of adjacent pillars, a rigid blocking surface can be formed that undergoes little bending deformation when an attack is received. Therefore, even at sites where protected objects such as roads, railways, and houses exist near the protective fence, it is possible to install the fence in a position close to the protected objects. <2> Since the rigid blocking surface has a permeable structure with multiple horizontal slits, the kinetic energy of the collapsing debris can be efficiently attenuated as the debris passes through the horizontal slits during an impact. Therefore, not only is the load on the transmission-type rigid blocking surface reduced, but the load on the support columns that support the transmission-type rigid blocking surface can also be reduced. <3> By selecting the opening size of the horizontal slits in the rigid blocking surface, the buffering performance of the transparent rigid blocking surface can be adjusted. <4> Because the rigid blocking surface has a permeable structure, rainwater can be naturally drained downstream even if debris accumulates upstream of the blocking surface. Therefore, there is no need to install special wastewater treatment facilities at the protective fence. <5> The ends of the cross beams are rotatable around the supports, and the cross beams can be connected to the supports by pin joints so that the cross beams can be rotatable in the lateral and vertical directions. Therefore, the protective fence can be installed with any curvature, and even if the installation surface of the protective fence has an uneven gradient or inclination, the cross beams can be installed without being affected by the gradient or inclination of the installation surface. <6> By constructing the cross beams that make up the transparent rigid blocking surface as detachable, not only can collapsed soil and other debris that has accumulated upstream of the transparent rigid blocking surface be efficiently removed, but repairs can also be easily made by replacing only the cross beams that have been damaged by impact with new ones. <7> Since the cross beams can be transported by workers, a transparent rigid blocking surface can be easily constructed by assembling the cross beams by hand alone without using heavy machinery. <8> By providing a plastic blocking surface above a permeable rigid blocking surface, the permeable rigid blocking surface can efficiently capture collapsed soil and sand, and the plastic blocking surface can efficiently capture falling rocks, making it possible to capture multiple types of falling objects with a single protective fence. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a front view of a protective fence according to a first embodiment of the present invention with a portion omitted. [Diagram 2] Assembly diagram of the transparent rigid blocking surface that makes up the protective fence [Diagram 3] A perspective view of the cross beam and connecting device that constitute the transparent rigid blocking surface. [Figure 4] In the diagram illustrating the plastic blocking surface, (A) is a plan view of the connection between the horizontal rope and the support, and (B) is a side view of the connection between the horizontal rope and the support. [Diagram 5] Illustration of how to install protective fences [Figure 6] Illustrative diagram of impact action on a rigid blocking surface and a plastic blocking surface of a permeable type [Figure 7] FIG. 1 is a front view of a protective fence according to a second embodiment of the present invention with a portion omitted. BEST MODE FOR CARRYING OUT THEINVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0013] [Example 1] <1> Overview of the protective fence The protective fence according to the present invention is a protective fence for protecting against avalanches, falling soil, or falling rocks. Regarding the protective fence illustrated in Figure 1, this protective fence comprises a plurality of pillars 10 erected on an installation surface G at a predetermined interval, a transparent rigid blocking surface 30 horizontally disposed between the plurality of pillars 10, and a plastic blocking surface 40 located above the rigid blocking surface 30 and horizontally disposed between the plurality of pillars 10. The rigid blocking surface 30 has higher rigidity than the plastic blocking surface 40, and is less susceptible to bending deformation. In this embodiment, a form in which the plastic prevention surface 40 is formed of a protective net will be described.

[0014] <2> pillar The struts 10 include intermediate struts and end struts. The support 10 has a buried portion 11 that is buried in the installation surface G, and an above-ground portion 12 that protrudes above the ground surface. The lengths of the buried portion 11 and above-ground portion 12 are selected appropriately depending on the installation site, the height of each blocking surface 30, 40, etc.

[0015] <2.1> Examples of supports As the support 10, for example, a known support structure such as a steel pipe, an H-shaped steel beam, a column, or a mortar-filled steel pipe can be used. In this embodiment, a configuration in which the cross section of the support 10 is circular will be described.

[0016] <2.2> Buried part of the pillar In this example, the embedded portion 11 of the pillar 10 is erected into a mounting hole 14 drilled in the ground and filled with a consolidating material 15 such as mortar, but the embedded portion 11 of the pillar 10 may also be buried in a concrete foundation and erected.

[0017] <2.3> Above-ground part of the support

[0018] In this example, a transparent rigidity blocking surface 30 is formed on the lower side of the above-ground portion 12 of the support 10, and a plasticity blocking surface 40 is formed above the transparent rigidity blocking surface 30, on the upper side of the above-ground portion 12, to explain the configuration.

[0019] In the following explanation, the area of ​​the above-ground portion 12 where the rigid blocking surface 30 is attached is defined as the lower layer 12a, and the area where the plastic blocking surface 40 is attached is defined as the upper layer 12b.

[0020] <2.3.1> Lower part of the support The lower layer 12a of the above-ground portion 12 is a portion where a transparent rigidity blocking surface 30 is provided, and its outer peripheral surface is formed as a smooth surface without protrusions.

[0021] <2.3.2> Upper part of the support The upper layer 12b of the above-ground portion 12 is a portion where a plasticity preventing surface 40 is provided, and a plurality of net attachment elements (for example, brackets, etc.) are provided on the outer circumferential surface thereof. Net attachment elements corresponding to the constituent members of the protective net are well known, and well known net attachment elements are provided on the upper layer portion 12b.

[0022] <3> Transparent rigid blocking surface The transparent rigid blocking surface 30 is a highly rigid blocking surface that is intended primarily for collapsed soil and sand and has an extremely small amount of deflection deformation, and a plurality of horizontal slits 32 are formed in multiple stages in part of the blocking surface. The overall height of the rigid blocking surface 30 is appropriately selected depending on the expected amount of collapsed soil and sand, etc.

[0023] An example of a transmission-type rigid blocking surface 30 will now be described with reference to FIGS. The transmission-type rigid blocking surface 30 is composed of a group of highly rigid horizontal beams 31 arranged in a row at predetermined intervals. In this example, a form will be described in which the end of the cross beam 31 is detachably connected to the above-ground part 11 of the pillar 10 via a connecting device 20 so as to be rotatable in the vertical direction.

[0024] In this example, a form in which the cross beam 31 is laid horizontally at the center of the inside of the adjacent pillars 10, 10 will be described, but the cross beam 31 may be laid horizontally on the mountain side or valley side of the slope of the adjacent pillars 10, 10.

[0025] <3.1>Connection device The connecting device 20 is a connecting tool for connecting the support 10 and the cross beam 31 together. Regarding the connecting device 20 illustrated in FIG. 3, the connecting device 20 includes an annular socket portion 21 connectable to the lower portion 12a of the support 10, and a receiving tube 23 protruding laterally from the outer circumferential surface of the socket portion 21.

[0026] <3.1.1> Socket section The socket portion 21 has a connecting hole 22 that penetrates vertically. The connecting hole 22 has a diameter that allows it to be attached to the exterior of the lower layer portion 12a that constitutes the above-ground portion 12 of the support 10 and be moored. The reason why the connecting hole 22 of the socket portion 21 is sized so as to be able to be externally fitted to the lower portion 12a of the support 10 is so that the cross beam 31 can be connected to the support 10 so as to be rotatable in the lateral direction with the support 10 as the center.

[0027] The socket portion 21 may have an endless structure, but may also be configured with a plurality of divided bodies, and both ends of each divided body having an arc shape may be connected by bolts or the like to assemble them into a ring shape. When the socket portion 21 is constructed of a plurality of divided bodies, the connecting device 20 can be attached later to the peripheral surface of the support 10 that has been erected in advance.

[0028] <3.1.2> Receiver A horizontal receiving tube 23 is provided on the outer circumferential surface of the socket portion 21 by welding or the like. The receiving tube 23 is a receiving member for rotatably connecting the end of the cross beam 31 with a pin, and a horizontally long hole 24 for inserting the support shaft 25 is provided in the vertical plate surface.

[0029] In this example, a height difference is provided between the receiving tube 23 and the socket portion 21, and the side shape of the connecting device 20 is formed into an approximately L-shape. However, the heights of the receiving tube 23 and the socket portion 21 may also be made the same dimensions.

[0030] In this example, by making the height of the socket portion 21 approximately half the height of the receiving tube 23, it is possible to alternate the up and down orientation of the connecting devices 20 when stacking multiple connecting devices 20 in multiple stages, and to align the cross beams 31 in adjacent spans at the same level.

[0031] The connecting device 30 is not limited to the exemplary form described above, and in essence it is sufficient that it can be attached in multiple stages to the above-ground portion 12 of the pillar 10, that multiple cross beams 31 can be detachably attached between adjacent pillars 10 20 via the connecting device 30, and that it can be horizontally spanned so that it can swing up and down.

[0032] <3.2> Cross beam The cross beam 31 is a highly rigid member with a large bending strength and a total length that allows it to be laid horizontally between adjacent pillars 10 (one span). A continuous belt surface 31a is formed on the side surface of the cross beam 31. The belt surface 31a functions as a capture surface (attack surface) for various types of falling objects. The vertical width (height) dimension of the belt surface 31a is appropriately selected depending on the type and amount of collapsed material, etc. Specifically, the strength of the cross beam 31 and the vertical width (height) dimension of the belt surface 31a are designed so as to withstand the impact force of falling objects calculated based on the height of the slope, the gradient of the slope, the distance between the pillars, etc. A horizontal hole 33 is formed near the end of the cross beam 31 and passes through the cross beam 31 .

[0033] The cross beam 31 may be, for example, an H-shaped steel beam, a steel pipe, a column, or a mortar-filled steel pipe. For practical purposes, a mortar-filled steel pipe is desirable, in which an H-shaped steel beam is inserted into the column and then filled with a filler such as mortar.

[0034] <3.3> Pin connection between the connector and the cross beam The end of the cross beam 31 and the connecting device 20 are pivotally supported by inserting a support shaft 25 through the long hole 24 of the receiving tube 23 and the horizontal hole 33 of the cross beam 31. The end of the cross beam 31 and the connecting device 20 are pivotally supported by the support shaft 35 in order to enable the cross beam 31 to be tilted (rotated) in the vertical direction relative to the connecting device 20.

[0035] <3.4> Horizontal slit A horizontal slit 32 is formed between adjacent horizontal beams 31 vertically. The horizontal slits 32 have not only a drainage function but also a buffer function for collapsed objects. The width (spacing) of the horizontal slits 32 is appropriately selected taking into consideration the on-site environment, such as the gradient angle of the slope and the type of collapsed material.

[0036] For practical purposes, the width of the horizontal slits 32 is preferably about 0.5 to 2 times the width of the horizontal beam 31 (the vertical width of the band surface 31a). If the width of the cross beam 31 is narrower than 0.5 times the width of the cross beam 31, the permeability of the collapsed object will be extremely poor and the buffer effect will be deteriorated. If the width of the cross beam 31 is more than twice the width of the cross beam 31, This allows debris to easily pass through, significantly reducing the cushioning effect.

[0037] <4> Plastic inhibition surface The plastic blocking surface 40 is a flexible blocking surface intended primarily for preventing falling rocks, and is made of a protective net made of rope. The height of the plasticity preventing surface 40 is appropriately selected depending on the situation at the site.

[0038] The protective net constituting the plastic blocking surface 40 may be laid horizontally between a pair of adjacent supports 10 on a span-by-span basis, or may be laid horizontally continuously across multiple spans.

[0039] <4.1> Example of plastic arrest surface The protective net constituting the plastic blocking surface 40 illustrated in FIG. 1 comprises a plurality of horizontal ropes 41 hung in multiple stages between a plurality of supports 10, and a wire mesh net material 45 that covers the entire blocking surface. As shown enlarged in FIG. 4, both ends of the horizontal rope 41 are connected to the mounting bracket 13 protruding from the peripheral surface of the support 10 via, for example, a bolt-type connecting element 42 and a U-bolt set 43 .

[0040] The protective net is not limited to this example, and may be any one of netting materials such as wire rope or wire mesh, or a combination of wire rope and netting materials. Furthermore, the protective net may be provided with shock-absorbing metal fittings or may not be provided with shock-absorbing fittings.

[0041] [How to build a protective fence] Next, we will explain how to construct a protective fence.

[0042] <1> Erection of the pillars Explaining this with reference to FIG. 5, after drilling a mounting hole 14 in the installation surface G, the embedded portion 11 of the post 10 to be erected is erected in the mounting hole 14. The consolidating material 15 such as mortar may be filled in the installation hole 14 before the installation of the support 10, or may be filled after the installation of the support 10.

[0043] When the connecting device 20 has an endless structure, a plurality of connecting devices 20 are attached to the embedded portion 11 of the support 10 in advance, and the support 10 is then erected. If necessary, an upper chord 13 is laid horizontally between the heads of adjacent columns 10.

[0044] <2> Formation of a rigid blocking surface for transmission Explaining with reference to Figures 1 to 3, a cross beam 31 is arranged between adjacent connecting devices 20, 20 provided on the lower part 12a of the support 10, and both ends of the cross beam 31 are inserted into receiving tubes 21 of the connecting device 20 and pivotally supported via support shafts 25. When stacking a plurality of cross beams 31 between adjacent supports 10, a transverse slit 32 is formed between the upper and lower cross beams 31, and a transparent rigidity blocking surface 30 is constructed.

[0045] In the present invention, a permeable rigid blocking surface 30 can be formed by bridging a plurality of cross beams 31 at intervals in the height direction between the above-ground portions 12 of adjacent pillars 10 .

[0046] In addition, the ends of the cross beams 31 are connected to the support posts 10 via connecting devices 20 so that they can rotate freely around the support posts 10, so that the multiple cross beams 31 that make up the protective fence can be installed with any curvature. Furthermore, since the connection between the end of the cross beam 31 and the support 10 is pivoted so as to be rotatable in the vertical direction, even if the installation surface G has an uneven gradient or inclination, the cross beam 31 can be installed to follow the gradient or inclination of the installation surface G. Therefore, there is no need to level the installation surface G in advance. Furthermore, since the cross beams 31 can be transported by workers, the transmissive rigid blocking surface 30 can be easily constructed by installing the cross beams 31 by human power alone without using heavy machinery.

[0047] <3> Formation of plastic blocking surface Explaining with reference to FIGS. 1 and 4, a plurality of horizontal ropes 41 are laid horizontally in multiple stages between the upper parts 12b of the pillars 10, and the entire blocking surface is covered with a net material 45 to form a plastic blocking surface 40. If necessary, a known spacing member 44 is installed between adjacent horizontal ropes 41.

[0048] <4> Other methods for constructing protective fences As described above, in this example, the form in which the pillars 10 are erected first and then multiple cross beams 31 are added later to construct the transparent rigidity blocking surface 30 has been described. However, the method of constructing the transparent rigidity blocking surface 30 is not limited to this form, and the work of erecting the pillars 10 and the work of laying the cross beams 31 may be reversed.

[0049] That is, a plurality of connecting devices 20 are stacked in layers, and cross beams 31 are laid between adjacent connecting devices 20 to construct a transparent rigidity blocking surface 30 in advance. The embedded parts 11 of the pillars 10 are inserted into the multiple connecting devices 20 that have been stacked in layers in advance, and are erected to integrate the pillars 10 and the cross beams 31.

[0050] [Protection fence capture function] Next, the capturing function of the protective fence will be explained.

[0051] 1. Function of the transparent rigid blocking surface

[0052] <1> The rigid transparent blocking surface captures debris. The function of capturing collapsed material W1 such as collapsed soil by the transparent rigid blocking surface 30 will be described with reference to FIG. When collapsed soil or other debris W1 slides down toward the safety fence, it collides with a transparent rigid blocking surface 30 close to the ground surface of the safety fence. The impact force of the collapsed object W1 acting on the rigid blocking surface 30 is supported by the strength of the multiple cross beams 31, and the collapsed object W1 is captured by the band surface 31a on the upstream side of the rigid blocking surface 30.

[0053] <2> Deformability of the rigid blocking surface of the transparent type The transmission-type rigidity blocking surface 30 is composed of a highly rigid cross beam 31 having a large bending strength. Therefore, even if a large impact force acts on the band surface 31a of each cross beam 31, the cross beam 31 does not undergo large bending deformation toward the downstream side. In this way, in the present invention, the amount of deformation of the rigidity blocking surface 30 can be kept small, so that even if there are objects to be protected such as roads, railways, and houses nearby, there is no need to install the protective fence at an excessive distance from the object to be protected.

[0054] <3> Cushioning effect due to the rigid blocking surface of the transparent type Since the through-type rigid blocking surface 30 has a plurality of horizontal slits 32 having a buffer function, the kinetic energy of the collapsed material W1 such as collapsed soil or sand is attenuated when the collapsed material W1 passes through the horizontal slits 32. Therefore, not only is the load on the cross beams 31 that constitute the transmission-type rigidity blocking surface 30 reduced, but the load on the columns 10 that support the cross beams 31 is also reduced.

[0055] <4> Drainage by a rigid permeable blocking surface Since the rigid blocking surface 30 has a permeable structure with a plurality of horizontal slits 32, before the collapse of the collapsed object W1, rainwater flows down through the horizontal slits 32 and water does not accumulate on the upstream side of the protective fence. Furthermore, even if the collapsed object W1 is captured on the upstream side of the transparent rigid blocking surface 30, it can be naturally drained downstream through the horizontal slits 32, so there is no need to apply special drainage treatment to the protective fence.

[0056] <5> Removal of collapsed debris Since each cross beam 31 constituting the transparent rigidity blocking surface 30 has a detachable structure, the cross beam 31 can be easily removed on a span-by-span basis by removing the support shaft 25. Therefore, the collapsed material W1 such as collapsed soil and sand accumulated on the upstream side of the transparent rigid blocking surface 30 can be easily removed.

[0057] <6> Repairability of transparent rigid blocking surfaces The through-type rigid blocking surface 30 is composed of a plurality of cross beams 31 which can be attached and detached in span units. Therefore, if some of the cross beams 31 are deformed or damaged due to an attack, the rigidity blocking surface 30 can be repaired by replacing the minimum number of cross beams 31 required with new ones.

[0058] The above describes a situation in which a collapsing object W2 such as collapsed soil or sand collides with the transparent rigid blocking surface 30, but the aforementioned capture function is also exhibited when a collapsing object W2 such as falling rocks collides with the transparent rigid blocking surface 30.

[0059] 2. Function of plastic blocking surface As shown in FIG. 6, when a fallen object W2 such as a rock falls beyond the installation height of the transparent rigid blocking surface 30, the plastic blocking surface 40 of the protective fence exerts a capturing function. The function of the plastic blocking surface 40 to capture the fallen objects W2 such as rocks is well known, and therefore a detailed explanation thereof will be omitted.

[0060] [Example 2] <1> Other guardrails In the previous Example 1, a form was described in which the blocking surface of the protective fence is composed of a combination of a transparent rigid blocking surface 30 and a plastic blocking surface 40, but the blocking surface of the protective fence may also be composed of only a transparent rigid blocking surface 30. As shown in FIG. 7, in this embodiment, a transparent rigid blocking surface 30 is formed over the entire length of the above-ground part 12 of the support pole 10 .

[0061] <2> Effects of this Example In this embodiment, the entire above-ground portion of the protective fence is constructed of a transparent rigid blocking surface 30, so that the same protective fence can efficiently capture not only collapsed objects W1 such as fallen soil and sand, but also collapsed objects W2 such as falling rocks. [Explanation of symbols]

[0062] G... Support surface 10... Prop 11. Buried part of support pillar 12. Above-ground part of support 12a Upper part of the support 12b: Lower part of the support 13...Top chord material 14....Installation hole 20...Connection device 21... Socket section 22...Connecting hole 23... Receiver 24...long hole 25...Spindle 30...Transparent rigid blocking surface 31...Horizontal beam 31a...Obi surface 32 Horizontal slit 33...Horizontal hole 40... Plastic blocking surface (protective net) 41 Horizontal rope 44... Spacing material 45 Net material

Claims

1. A protective fence comprising a plurality of posts that are erected at intervals with their buried parts buried in a construction surface and a blocking surface provided between the above-ground parts of adjacent posts, and which captures collapsed objects through the blocking surface, A rigidity blocking surface is provided between the above-ground portions of the adjacent supports; The rigid blocking surface is formed as a transparent rigid blocking surface by providing a horizontal slit that allows a portion of the collapsed object to pass through. Protective fence.

2. 2. The protective fence according to claim 1, wherein the transparent rigid blocking surface is composed of a plurality of cross beams, and a continuous band surface is formed on the side surface of the cross beams.

3. The protective fence as described in claim 2, characterized in that a connecting device is rotatably attached to the ground portion of the support pillar, and the connecting device and the end of the cross beam are pivotally supported by a horizontal support shaft and connected by a pin.

4. 3. A protective fence as claimed in claim 2, wherein the plurality of cross beams are detachably mounted between the above-ground portions of adjacent posts.

5. 3. The safety fence according to claim 2, wherein the cross beams are made of concrete-filled steel pipes.

6. 2. The safety fence according to claim 1, wherein a plastic blocking surface is formed above the transparent rigid blocking surface.

7. 7. The safety fence according to claim 6, wherein the plastic blocking surface is a safety net made of rope, net or a combination of rope and net.

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