Guard fence

Abstract

To provide a guard fence capable of improving shock absorbing performance in a terminal section without breaking a terminal part of a guard net by a simple method.SOLUTION: A guard fence is provided with a plurality of supports 10 ( 10a, 10b) erected at intervals, and a synthetic resin-made guard net 20. A terminal pseudo blocking surface 30 made of a frame rope 31 is arranged between a terminal support 10b and a side anchor 41 arranged outside the terminal support 10b, a part of the frame rope 31 of the terminal pseudo blocking surface 30 and the terminal side of the guard net 20 are connected to each other so that the frame rope 31 of the terminal pseudo blocking surface extends toward the inside of a terminal section 20b when receiving an impact.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a protective fence for capturing falling objects such as rocks, earth and sand, and avalanches, and more particularly to a protective fence equipped with a protective net made of synthetic fiber. [Background technology]

[0002] A protective fence is known that is equipped with multiple pillars (intermediate pillars and terminal pillars) erected at intervals to capture falling objects such as falling rocks and earth and sand, and a protective net stretched between the pillars (Patent Document 1). Known types of protective nets include high-strength metal protective nets made from a combination of wire ropes and wire mesh, and synthetic fiber protective nets that are easy to handle and have excellent corrosion resistance. This type of protective fence has an intermediate section in which a blocking surface made of protective net is formed between multiple intermediate supports, and end sections in which a blocking surface made of protective net is formed between the end supports. The terminal portions of the protective net that constitute the blocking surface are fixed over the entire length of the terminal supports.

[0003] It is generally known that protective fences bear a greater load at the terminal sections than at the intermediate sections when hit by an attack. Therefore, various means have been proposed to increase the strength of the terminal sections. As a means for increasing the strength of the end sections, it is known to design the end supports to be stronger than the intermediate supports. Patent Document 2 discloses reinforcing the end section by installing a support pillar at an angle to the end pillar. Patent Document 3 discloses that an upper chord member is erected between the column heads of the terminal sections, and brace members are connected in an X-shape between the upper and lower parts of a pair of adjacent columns to reinforce the terminal sections. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-24378 [Patent Document 2] JP 2017-14760 A [Patent Document 3] Japanese Patent Publication No. 2023-146863 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventional safety fences have the following problems to be solved: <1> The technique of designing terminal supports with high strength is one of the reasons why protective fences are becoming more expensive. <2> The reinforcement structure of Patent Document 2, which installs additional high-rigidity support pillars, provides reinforcement to the terminal pillars not only in the longitudinal direction of the protective fence but also in the front-to-back direction, thereby reducing the energy absorption effect caused by deformation of the terminal pillars. Furthermore, since the support pillars are located within the blocking surface of the terminal section, there is a risk that falling rocks that hit the support pillars directly will bounce back and cause secondary disasters. <3> The reinforcement structure of Patent Document 3, which combines upper chord members and brace members, increases the number of constituent materials in the terminal sections, which not only increases material costs but also requires a lot of time and effort to assemble the terminal sections, making it difficult to construct. <4> For example, if an attack hits the terminal section, the load will be concentrated at the connection point between the terminal part of the protective net and the terminal support pole, which may cause the protective net to be damaged. <5> Even if the terminal sections of the protective fence can be reinforced by the means described in Patent Documents 1 and 2, this does not lead to an improvement in the impact absorption performance of the blocking surfaces of the terminal sections. This is because the deformation amount of the blocking surface in the terminal section is smaller than that in the intermediate section, and the impact absorption performance of the blocking surface in the terminal section is lower than that in the intermediate section. Therefore, there is a need to propose a technology that can improve the impact absorption performance of the terminal section.

[0006] The present invention has been made in view of the above points, and aims to provide a protective fence that can solve the problems of the prior art described above. [Means for solving the problem]

[0007] The present invention relates to a protective fence comprising a plurality of posts erected at intervals, and a protective net made of synthetic fiber, which has the function of capturing falling objects and is hung horizontally between adjacent posts with its upper and lower edges moored to the top and bottom of the posts, and which has an intermediate section in which a blocking surface made of the protective net is formed between a plurality of intermediate posts, and a terminal section in which a blocking surface made of the protective net is formed between the intermediate posts and the terminal posts, and a terminal pseudo-blocking surface made of a frame rope is arranged between the terminal posts and lateral anchors provided on the outside of the terminal posts, and a part of the frame rope of the terminal pseudo-blocking surface is connected to the terminal edge of the protective net so that when an impact is received, the frame rope of the terminal pseudo-blocking surface extends into the terminal section. In another embodiment of the present invention, mooring elements are provided on the upper and lower parts of the support poles, and the upper and lower edges of the protective net and the frame rope of the terminal pseudo-blocking surface are slidably moored via the mooring elements. In another embodiment of the present invention, the protective net comprises a frame rope that is anchored to the upper and lower parts of the support poles, and a net material that is inscribed in the frame rope and is integrally provided on the frame rope. In another embodiment of the present invention, the elongation rates of the frame ropes of the terminal pseudo-blocking surface and the frame ropes of the safety net are approximately equal. In another embodiment of the present invention, the frame rope of the terminal pseudo-blocking surface has a side edge arranged along the terminal support and a pair of retaining edges formed continuously from both ends of the side edge, and the pair of retaining edges are fixed to a common side anchor or individual side anchors. In another embodiment of the present invention, the terminal pseudo-blocking surfaces may be arranged along the extension direction of the protective net, or along the transverse direction of the protective net. [Effects of the Invention]

[0008] The present invention has at least one of the following advantages. <1> By connecting a portion of the frame rope of the terminal pseudo-blocking surface to the terminal edge of the protective net so that the frame rope of the terminal pseudo-blocking surface extends toward the terminal section when an attack is received, the protective net in the terminal section can be made to behave in the same way as in the intermediate section. Therefore, the shock absorption performance in the terminal section of the protective net can be improved without breaking the terminal section. <2> The protective net in the terminal section can disperse and absorb impact forces to other protective nets adjacent to the terminal section and to the terminal pseudo-blocking surface, thereby reducing the load acting on the terminal support. Therefore, there is no need to design the end columns to be stronger than the intermediate columns, and the end columns can be manufactured economically. <3> If the extension rates of the frame ropes of the terminal pseudo-blocking surface and the frame ropes of the protective net are set to be approximately the same, the extension amounts of the protective net located in the terminal section and the frame ropes provided on the terminal pseudo-blocking surface will be equal. Therefore, the protective net can be smoothly and balancedly deformed in the terminal section. <4> If an attack occurs in the terminal section, the falling debris can be captured by the protective net, just as if an attack occurs in the intermediate section. <5> In the present invention, the load burden on the terminal struts when hit is approximately the same as that on the intermediate struts, thereby significantly reducing the load burden on the terminal struts. Therefore, there is no need to make the terminal posts stronger than the intermediate posts, or to install support posts on the terminal posts to reinforce the terminal sections, allowing the protective fence to be designed economically. <6> The terminal pseudo-blocking surfaces can be arranged not only in the extension direction of the protective net, but also along the transverse direction of the protective net. This increases the degree of freedom in installing the terminal pseudo-blocking surface, allowing the terminal pseudo-blocking surface to be installed according to the on-site conditions of the protective fence. [Brief explanation of the drawings]

[0009] [Figure 1] A partially omitted model diagram of a protective fence according to the present invention. [Figure 2] An enlarged view of the protective fence at the intermediate support post with part of the protective net omitted. [Figure 3] Enlarged view of the protective fence at the terminal post position with part of the protective net omitted [Figure 4]A model diagram of the protective fence to explain the capturing effect of the protective net in the intermediate section [Figure 5] Cross section of VV in Figure 4 [Figure 6] Model diagram of a protective fence to explain the capturing effect of the protective net in the terminal section [Figure 7] Cross-sectional view of VII-VII in Figure 6 DETAILED DESCRIPTION OF THE INVENTION

[0010] [Example 1] The embodiments of the present invention will be described in detail with reference to the drawings.

[0011] <1> Overview of the protective fence Referring to Figures 1 to 3, the protective fence of the present invention comprises a plurality of posts 10 (intermediate posts 10a and terminal posts 10b) spaced apart at a predetermined interval so that they can stand on their own, a protective net 20 hung horizontally across the slope valley side of the plurality of posts 10, and a terminal pseudo-blocking surface 30 connected to the terminal edge of the protective net 20 and extending outward from the terminal posts 10b.

[0012] <2> pillar The support 10 includes an intermediate support 10a and an end support 10b, and the basic structure of both the support 10a and the end support 10b is the same. In the present invention, it is not necessary to set the strength of the terminal support 10b higher than that of the intermediate support 10a, and the intermediate support 10a and the terminal support 10b may have the same strength.

[0013] <2.1> Intermediate section and terminal section In the following description, the section between a pair of adjacent intermediate supports 10a is defined as an intermediate section 20a, and the section between the intermediate support 10a and the end support 10b is defined as an end section 20b.

[0014] <2.2> Examples of supports The support pillar 10 is a highly rigid columnar body such as a steel pipe, an H-beam, a concrete-filled steel pipe, or a concrete column.

[0015] <2.3> Support erection type The pillar 10 may be erected by burying the lower part of the pillar 10 in the support base 40 (local ground, concrete foundation), or by having the lower part of the pillar 10 rest on the surface of the support base 40 without being buried.

[0016] <2.4> Mooring element The poles 10 are provided at the top and bottom with anchoring elements 11 for attaching a protective net 20 . The upper and lower edges of the protective net 20 are attached to the upper and lower parts of the support 10 via anchoring elements 11. In this example, a configuration in which a shackle is used as the mooring element 11 will be described, but the mooring element 11 is not limited to a shackle and may be any structural element capable of mooring the upper and lower edges of the protective net 20. The protective net 20 is only anchored to the poles 10 at its upper and lower edges, and is not fixed to the poles 10 over the entire length thereof.

[0017] <2.5> Backing rope If necessary, the upper part of a stay rope (not shown) is connected to the head of each support 10, and the lower end of the stay rope is connected to a mountain side anchor or a lateral anchor to prevent each support 10 from tilting.

[0018] <3> protective net The protective net 20 is a blocking surface for capturing falling objects, and is made of either a rope material or a net material, or a combination of these, made of a synthetic fiber net-like material. The protective net 20 illustrated in this example comprises a rectangular frame rope 21 and a net material 22 formed integrally inside the frame rope 21. The protective net 20 is moored between the upper and lower parts of a pair of adjacent posts 10 at the four corners of the frame rope 21 via mooring elements 11.

[0019] The protective net 20 is a single piece of net material, but a net material with a small mesh size or a hard net material may be placed on top of the hit-receiving surface of the protective net 20.

[0020] <3.1> Total length of the protective net The total length of the protective net 20 may be measured in span units, or may have a total length spanning multiple spans. In this example, a configuration will be described in which a connecting rope 23 is wound between the left and right sides 21a, 21a of the frame ropes 21 of a plurality of protective nets 20 formed in span units to provide continuity to the protective nets 20.

[0021] <3.2> Frame rope The frame rope 21 of the protective net 20 has an endless structure, and as shown in FIG. 1, has a pair of left and right side edges 21a, an upper edge 21b, and a lower edge 21c.

[0022] As the material for the frame rope 21, for example, a braided rope made of synthetic fiber, which is made by weaving a plurality of polyester strands into a hollow structure and is capable of stretching to a certain length, can be used. When a braided rope is used as the frame rope 21, an endless structure can be easily formed by inserting the ends of the braided rope into each other.

[0023] <3.3> Net material The net material 22 is a synthetic fiber net material having a diamond-shaped or square mesh, and is formed integrally with the frame rope 21 so as to be in contact with the inside of the frame rope 21. The knitted fabric of the net material 22 may be a Russell knit or knotless net.

[0024] The material of the net material 22 may be any one of nylon fiber, polyethylene terephthalate fiber, polyethylene naphthalate fiber, polypropylene fiber, low-pressure polyethylene fiber, acrylic fiber, rayon fiber, etc., or a combination of two or more of these.

[0025] <3.4> Hanging rope and ring body In this example, a description will be given of a form in which the protective net 20 is suspended using a suspension rope 12 and a ring body 13 when it is hung horizontally. The suspension rope 12 is laid horizontally between the heads of the adjacent posts 10. A plurality of ring bodies 13 are moored to the suspension rope 12, and a frame rope 21 on the upper side of the protection net 20 is hung down from the suspension rope 12 via the ring bodies 13. The hanging rope 12 and the ring body 13 are not essential and may be omitted.

[0026] <4> Terminal pseudo-blocking surface The terminal pseudo-blocking surface 30 is a pseudo-blocking surface that functions to assist the protective net 20 in the terminal section 20b in capturing fallen objects. The terminal pseudo-blocking surface 30 is provided adjacent to the protective net 20 of the terminal section 20b in the extension direction, and load can be transmitted between the terminal section 20b and the protective net 20. The terminal pseudo-blocking surface 30 does not have a net element and is composed of only a frame rope 31.

[0027] <4.1> Frame rope with terminal pseudo-blocking surface The frame rope 31 constituting the terminal pseudo-blocking surface 30 has a side edge 31a arranged along the terminal support 10b and a pair of supporting edges 31b, 31b formed continuously from both ends of the side edge 31a. The frame rope 31 of the terminal pseudo-blocking surface 30 is made of an elastic material similar to the frame rope 21 of the protection net 20.

[0028] <4.2> Relationship between the terminal pseudo-blocking surface and the elongation rate of the frame rope of the protective net The elongation rates of the frame rope 31 of the terminal pseudo-blocking surface 30 and the frame rope 21 of the protective net 20 are approximately equal. This is to prevent the frame rope 31 from stretching when the protective net 20 in the terminal section 20b is hit and hindering the deflection deformation of the protective net 20 located in the terminal section 20b toward the valley side.

[0029] <4.3> Arrangement of frame ropes The frame rope 31 is slidably moored to the upper and lower mooring elements 11, 11 of the terminal support 10b. Both ends of the frame rope 31 are fixed to the side anchors 41. When forming the terminal pseudo-blocking surface 30 using the frame rope 31, a side edge 31a is formed in the section arranged parallel to the terminal support 10b, and supporting edges 31b, 31b are formed in the section from the upper and lower parts of the side edge 31a to the side anchor 41.

[0030] <4.4> Lateral anchor In this example, a configuration will be described in which a side anchor 41 is provided outside the terminal support 10b on the extension end of the protective net 20, and the base ends of each supporting side 31b, 31b are fixed to the common side anchor 41.

[0031] The frame rope 31 is not limited to an endless structure, and the base ends of a pair of supporting sides 31b, 31b constituting the frame rope 31 may be fixed to a plurality of side anchors individually provided.

[0032] <4.5> Number of frame ropes The frame rope 31 may be made up of a single rope material or a plurality of rope materials. When the frame rope 31 is made up of multiple rope materials, there are two types: a form in which multiple independent rope materials are combined and used, and a form in which a single long rope material is wound multiple times.

[0033] <5> Protection net mooring structure The upper and lower edges of the protective net 20 in the intermediate section 20a are anchored to the upper and lower parts of the intermediate support 10a via anchoring elements 11, 11.

[0034] The protective net 20 in the terminal section 20b is only anchored at its upper and lower edges to the intermediate support 10a and the upper and lower parts of the terminal support 10b, and the protective net 20 located in the terminal section 20b is not fixed over the entire length of the terminal support 10b.

[0035] <6> Connection structure of protective net in the intermediate section The left and right sides (sides 21a of the frame ropes 21) of the protection net 20 located in the intermediate section 20a are connected via a connecting rope 23 so that load can be transmitted.

[0036] <7> Connection structure of protective net in terminal section One end (left end) of the protective net 20 located in the terminal section 20b is connected to the right end (side edge 21a of the frame rope 21) of the protective net 20 located in the intermediate section 20a via a connecting rope 23 so as to enable load transmission. The other end (right terminal edge) of the protective net 20 located in the terminal section 20b is connected to the left edge (side edge 31a of the frame rope 31) of the terminal pseudo-adjacent surface 30 via a connecting rope 23 so as to enable load transmission.

[0037] <8> Relationship between the blocking surface of the protective net and the pseudo-blocking surface of the terminal The protective net 20 provided in the intermediate section 20a and the terminal section 20b functions as a blocking surface that directly captures the collapsed object W.

[0038] The terminal pseudo-blocking surface 30 does not have a net element, and therefore does not function as a blocking surface that captures the collapsed object W using only the frame rope 31. The terminal pseudo-blocking surface 30 supports the capture function of the protective net 20 located in the terminal section 20b by connecting to the terminal edge of the protective net 20, and therefore functions as a pseudo-blocking surface.

[0039] [Capturing effect of protective fences] The function of the protective fence in capturing the collapsed object W will be described with reference to FIGS.

[0040] <1> Capture action in the intermediate section (Figures 4 and 5) When the collapsed object W collides with the intermediate section 20a, the tension of the protection net 20, which is the blocking surface located in the intermediate section 20a, increases and the net is deformed toward the slope valley side. When tension equal to or greater than a certain level acts on the protection net 20, the protection net 20 stretches in the longitudinal direction (lateral direction) of the net.

[0041] Since the multiple protective nets 20 are continuous, when the protective net 20 located in the intermediate section 20a deforms toward the slope valley, the impact force is transmitted to the other protective nets 20, 20 adjacent to the left and right of the protected net 20, and the other adjacent protective nets 20, 20 are pulled into the protected intermediate section 20a.

[0042] As the other protective nets 20, 20 are pulled into the intermediate section 20a, the overall length of the protective net 20 located in the intermediate section 20a that has been hit is substantially increased.

[0043] The impact force of the collapsing object W is absorbed by the deflection deformation of the protective net 20 located in the intermediate section 20a and the other adjacent protective nets 20, 20 on the left and right, and is ultimately supported by the intermediate supports 10a, 10a located on both sides of the impact section.

[0044] In this way, when a collapsed object W collides with the middle section 20a of a specific span, the protective net 20 located in the middle section 20a will bend and deform, drawing in other adjacent protective nets 20 on the left and right, allowing the protective fence to perform its original capturing function.

[0045] <2> Capture action in the terminal section (Figs. 4 and 5) When a collapsed object W collides with the terminal section 20b, the tension of the protection net 20, which is the blocking surface located at the terminal section 20b, increases and the net is deformed toward the slope valley side. When a tension equal to or greater than a certain level acts on the protection net 20 located in the terminal section 20b, the protection net 20 stretches in the longitudinal direction (lateral direction) of the net.

[0046] If the terminal pseudo-blocking surface 30 did not exist, when the protective net 20 located in the terminal section 20b stretches in the longitudinal direction (horizontal direction) of the net, the left edge of the protective net 20 located in the terminal section 20b would be allowed to stretch, but the right terminal edge of the protective net 20 would not be able to stretch because it is fixed to the terminal support 10b. Therefore, a large stress may be concentrated between the right end edge of the terminal section 20b and the terminal support 10b, which may cause the protection net 20 to break.

[0047] In the present invention, a portion of the frame rope 31 of the terminal pseudo-blocking surface 30 is connected to the terminal edge of the protective net 20 so that the frame rope 31 of the terminal pseudo-blocking surface 30 extends toward the terminal section 10b when an attack is received. Therefore, when the terminal section 20b is hit, both the left and right sides of the protective net 20 that has received the hit extend, and the area of ​​the blocking surface in the terminal section 20b becomes substantially larger, allowing the protective net 20 located in the terminal section 20b to perform its original capturing function.

[0048] <2.1> Absorption of impact forces occurring in the terminal section In the present invention, both the left side and the terminal side (right side) of the protective net 20 located in the terminal section 20b are allowed to extend, so that the impact force acting on the protective net 20 in the terminal section 20b can be distributed and absorbed by the protective net 20 located in the intermediate section, which is the connecting element on the left and right, and the frame rope 31 that constitutes the terminal pseudo-blocking surface 30. The tension generated in the frame rope 31 of the terminal pseudo-blocking surface 30 is supported by the side anchors 41.

[0049] <2.2> Relationship between the end edge of the protective net and the end support The terminal edges of the protection net 20 are simply anchored to the upper and lower parts of the terminal poles 10b, and are not fixed over the entire length of the terminal poles 10b. Therefore, excessive stress is not concentrated between the terminal edge of the protection net 20 located in the terminal section 20b and the terminal support 10b.

[0050] <2.3> Relationship between the extension amount of the protective net and the terminal pseudo-blocking surface As described above, when the terminal section 20b is hit by an attack, both the left and right sides of the protection net 20 that are hit are stretched. If the elongation rates of the frame rope 31 of the terminal pseudo-blocking surface 30 and the frame rope 21 of the protective net 20 are set to be approximately the same, the extension amounts of the protective net 20 located in the terminal section 20b and the frame rope 31 provided on the terminal pseudo-blocking surface will be equal. Therefore, the protective net 20 can be smoothly and balancedly deformed in the terminal section 20b.

[0051] <2.4> Behavior of blocking surfaces in the middle section and in the terminal section As described above, the blocking surface (protective net 20) in the intermediate section 20a can be stretched on both the left and right sides due to the extension of the other protective nets 20 adjacent on both the left and right sides. Similarly, the blocking surface (protective net 20) in the terminal section 20b can also be extended on both the left and right sides due to the extension of the frame ropes 31 of the other adjacent protective nets 20 on both the left and right sides and the terminal pseudo blocking surface 30. Therefore, the behavior of the protection net 20, which is the blocking surface, is the same whether the intermediate section 20a is hit or the terminal section 20b is hit.

[0052] <3> Load bearing of terminal supports In conventional protective fences that do not have a terminal pseudo-blocking surface 30, the load borne by the terminal section when hit is greater than that of the intermediate section, so as a countermeasure, the terminal support posts are made stronger than the intermediate support posts, or support posts are installed diagonally on the terminal support posts to reinforce the terminal section.

[0053] In the present invention, the terminal edges of the protective net 20 are simply moored to the upper and lower parts of the terminal support pole 10b, and the terminal edges of the protective net 20 are not fixed over the entire length of the terminal support pole 10b. Therefore, the load on the terminal support 10b when hit is about the same as that on the intermediate support 10a, and the load on the terminal support 10b can be significantly reduced. Therefore, there is no need to make the terminal support 10b stronger than the intermediate support 10a or to install support posts on the terminal support 10b to reinforce the terminal section, allowing the protective fence to be designed economically.

[0054] [Example 2] Other embodiments will be described below, and in the description, the same parts as those in the first embodiment will be given the same reference numerals and detailed description thereof will be omitted.

[0055] <1> Other arrangements of terminal pseudo-blocking surfaces In the previous embodiment, the terminal pseudo-blocking surface 30 was described as being arranged along the extension direction of the protective net 20 provided in the terminal section 20b, but the arrangement of the terminal pseudo-blocking surface 30 is not limited to this. The terminal pseudo-blocking surface 30 may be arranged along the transverse direction (penetration direction) of the protective net 20 . That is, a side anchor 41 is provided on the slope valley side or slope mountain side of the terminal support 10b, and the supporting ends 31b, 31b of the frame rope 31 moored to the terminal support 10b are fixed to the side anchor 41. In this example, when the protective fence is viewed from above, the terminal pseudo-blocking surface 30 is formed by bending relative to the protective net 20, and the bending angle can be selected as appropriate.

[0056] <2> Effects of this embodiment The basic effects of this embodiment are the same as those of the first embodiment described above. In particular, in this embodiment, even at sites where it is not possible to install lateral anchors 41 in the extension direction of the protective net 20, it is possible to install lateral anchors 41 in the transverse direction of the protective net 20, thereby increasing the freedom of installation of the terminal pseudo-blocking surface 30. [Explanation of symbols]

[0057] 10... Prop 10a...Intermediate support 10b Terminal support 11. Mooring element 12. Hanging rope 13. Ring body 20. Protective net 21. Frame rope 22. Net material 23. Connecting rope 20a Middle section 20b Terminal section 30...terminal pseudo blocking surface 31. Frame rope 40...Support foundation 41 Lateral anchor

Claims

1. A protective fence comprising a plurality of support posts erected at intervals, and a synthetic fiber protective net having the function of capturing collapsed objects, with its upper and lower sides anchored to the top and bottom of the support posts and laid horizontally between adjacent support posts, with an intermediate section in which a blocking surface made of the protective net is formed between the plurality of intermediate support posts, and a terminal section in which a blocking surface made of the protective net is formed between the intermediate support posts and the terminal support posts, A terminal pseudo-blocking surface made of a frame rope is disposed between the terminal support and a side anchor provided outside the terminal support, A part of the frame rope of the terminal pseudo-blocking surface is connected to the terminal edge of the protective net so that the frame rope of the terminal pseudo-blocking surface extends toward the terminal section when hit. Protective fence.

2. 2. A protective fence as described in claim 1, characterized in that mooring elements are provided at the upper and lower parts of the support posts, and the upper and lower edges of the protective net and the frame rope of the terminal pseudo-blocking surface are slidably moored via the mooring elements.

3. 2. The safety fence according to claim 1, wherein the safety net comprises a frame rope that is fastened to the upper and lower parts of the support posts, and a net material that is inscribed and integral with the frame rope.

4. 4. A safety fence according to claim 3, wherein the extension rates of the frame ropes of the terminal pseudo-blocking surfaces and the frame ropes of the safety net are approximately equal.

5. 2. The protective fence according to claim 1, wherein the frame rope of the terminal pseudo-blocking surface has a side edge arranged along the terminal support and a pair of supporting edges formed continuously from both ends of the side edge, and the pair of supporting edges are fixed to a common side anchor or individual side anchors.

6. 2. The protective fence according to claim 1, wherein the terminal pseudo-blocking surfaces are arranged along the extension direction of the protective net.

7. 2. The safety fence according to claim 1, wherein the terminal pseudo-blocking surfaces are arranged along the transverse direction of the safety net.

Images