Guard fence

Abstract

To provide a guard fence capable of providing a passage for a person, a vehicle or the like by easily and quickly removing a part of the guard fence even after the guard fence is constructed.SOLUTION: A guard fence 10 according to the present invention is provided with a concrete guard fence 100 having a connector 20 on at least one side surface thereof, and a resin guard fence 200 having a hollow interior and capable of injecting or draining water into the cavity. The resin guard fence 200 is disposed between the concrete guard fence 100 and the concrete guard fence 100.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a safety fence. [Background technology]

[0002] There are cases where it is necessary to create a temporary boundary on the road surface, such as when creating a temporary boundary between the roadway and the construction area during road construction, or when creating a temporary median strip on an expressway. In such cases, a simple method is generally to lay down the boundary by installing adjacent concrete blocks that can function as a guardrail.

[0003] For example, the rights holders provide a concrete protective fence that has connecting devices on both sides, each of which has a mounting fixing portion that is fixed to the protective fence and a hook portion formed in a hook shape on the other end of the mounting fixing portion (Patent Document 1).

[0004] With this concrete guardrail, a concrete guardrail with connectors is installed on the road surface where a boundary is to be constructed, and a concrete guardrail to be placed adjacent to the installed concrete guardrail is hoisted with a crane or the like, and while checking its position, it is moved so that it is adjacent to the installed concrete guardrail, and as the hanging concrete guardrail is lowered, the hooks of the connectors are automatically adjusted to positions where they fit together and the guardrails are connected.In this way, by connecting such concrete guardrails with connectors, a boundary can be constructed using a guardrail made up of multiple concrete guardrails connected together.

[0005] However, as mentioned above, such concrete guardrails are heavy structures, and therefore require heavy machinery such as cranes for installation, and once installed, removal also requires heavy machinery, which is extremely time-consuming. Therefore, even if it is necessary to temporarily remove a portion of the fence to allow people or vehicles to pass, it is difficult to do so, or the heavy machinery must be brought back again, which is extremely troublesome. In particular, partial removal of concrete guardrails installed in tunnels is difficult due to the narrow space on the ceiling side. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2020-84484 Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, the present invention has been made to solve such problems, and aims to provide a protective fence that can be easily and quickly removed in part to create passageways for people, vehicles, etc., even after the fence has been constructed. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention employs the following means.

[0009] The protective fence according to the present invention comprises: a concrete protective fence having a connector on at least one side; A resin protective fence having a hollow interior that can be filled with water or drained from the hollow; Equipped with The resin protective fence is arranged between the concrete protective fences.

[0010] The protective fence according to the present invention is installed so that a resin protective fence is sandwiched between two concrete protective fences. The weight of the resin protective fence can be reduced by draining the water inside. Therefore, a portion of the protective fence can be easily and quickly removed by multiple people or a small forklift, etc., to create a passageway in the middle of the protective fence. This is particularly effective when removing a resin protective fence installed in a tunnel, as it does not require heavy machinery to lift it up.

[0011] Furthermore, the protective fence according to the present invention may be characterized in that the outer peripheral shape of the resin protective fence, as viewed from the side, is fabricated so that it is within a horizontal range of ±10 cm of the outer peripheral shape of the concrete protective fence, as viewed from the side. By adopting this configuration, the difference in level between the front or back of the concrete protective fence and the resin protective fence can be reduced in areas where they are adjacent to each other. Therefore, when a vehicle collides and slides from the concrete protective fence to the resin protective fence, or vice versa, the possibility of a head-on collision with the side of each protective fence can be reduced.

[0012] Furthermore, in the guardrail of the present invention, the outer periphery of the resin guardrail when viewed from the side may be the same as the outer periphery of the concrete guardrail when viewed from the side. By making the outer peripheries of each guardrail the same when viewed from the side, when a vehicle collides and moves from the concrete guardrail to the resin guardrail, or vice versa, no step is formed, and the vehicle moves as if sliding on a flat surface without colliding with the boundaries between the sides of each guardrail, thereby reducing the magnitude of the impact on the vehicle.

[0013] Furthermore, in the protective fence according to the present invention, the longitudinal length of the resin protective fence may be the same as or half the length of the concrete protective fence. By adopting such a configuration, no space is created between the resin protective fence and the concrete protective fence when transporting them by truck or the like, and they can be arranged in an aligned manner, allowing for efficient loading.

[0014] Furthermore, in the protective fence according to the present invention, at least two or more of the resin protective fences may be arranged in succession. By arranging multiple protective fences in succession, a wide passageway can be created that allows the passage of large vehicles such as trucks.

[0015] Furthermore, in the protective fence according to the present invention, the resin protective fence may be characterized by having through holes that penetrate vertically on both side surfaces and grooves that are cut from the through holes to the side surfaces. By adopting this configuration, the resin protective fence can be made connectable to adjacent resin protective fences or concrete protective fences.

[0016] Furthermore, in the protective fence according to the present invention, the resin protective fences may be connected to each other by a first connecting member having a plate-shaped portion and two cylindrical or truncated conical connecting portions arranged in parallel at both ends of the plate-shaped portion. By using such a first connecting member, the resin protective fences can be connected to each other by fitting the cylindrical or truncated conical connecting portions of the first connecting member into the through holes of each resin protective fence. This makes it possible to create a more robust protective fence.

[0017] Furthermore, in the guardrail of the present invention, the concrete guardrail and the resin guardrail may be connected by a second connecting member having a configuration in which a cylindrical or truncated cone-shaped connecting portion is joined to an L-shaped plate. The concrete guardrail and the resin guardrail can be connected by fitting the cylindrical or truncated cone-shaped connecting portion of the second connecting member into the through-hole of the resin guardrail and fitting the L-shaped plate into the connector of the concrete guardrail. This makes it possible to create a more solid guardrail.

[0018] Furthermore, in the protective fence according to the present invention, the resin protective fence may be rotationally symmetrical, so that it matches when rotated 180 degrees horizontally from a predetermined center of rotation. By manufacturing the protective fence so that it has the same shape when rotated 180 degrees, it can be installed without having to worry about the front and back. Furthermore, when transporting it on a truck or the like, it can be loaded without having to worry about the direction. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a perspective view of a safety fence 10 according to an embodiment. [Figure 2] FIG. 2 is a perspective view of the concrete safety fence 100 according to the embodiment. [Figure 3] FIG. 3 is a perspective view of the connector 20 according to the embodiment. [Figure 4] FIG. 4 is a top view showing the connector 20 according to the embodiment in a connected state. [Figure 5] FIG. 5 is a perspective view of a resin protective fence 200 according to an embodiment. [Figure 6] FIG. 6 is a schematic diagram showing the outer shape of the resin protective fence 200 according to the embodiment as viewed from the side. [Figure 7] FIG. 7 is a perspective view of a first connecting member 70 according to the embodiment and a resin protective fence 200 to which the first connecting member 70 is attached. [Figure 8]FIG. 8 is a perspective view of the second connecting member 80 according to the embodiment and the resin protective fence 200 to which the second connecting member 80 is attached. DETAILED DESCRIPTION OF THE INVENTION

[0020] A protective fence 10 according to an embodiment of the present invention will be described in detail below with reference to the drawings. The embodiments and drawings described below exemplify some of the embodiments of the present invention and are not intended to limit the scope of the present invention, and can be modified as appropriate without departing from the spirit of the present invention. Figure 1 is a perspective view of a protective fence 10 according to an embodiment. In this specification and claims, the terms "front," "back," "side," "top," and "bottom" refer to the directions shown in Figure 1.

[0021] The guardrail 10 according to the present invention mainly comprises a concrete guardrail 100 and a resin guardrail 200, with the resin guardrail 200 disposed between the concrete guardrails 100. Although three resin guardrails 200 are shown connected together in FIG. 1, there may be one, two, or three or more. Furthermore, multiple concrete guardrails 100 may also be connected together.

[0022] The concrete guardrail 100 is made of so-called precast concrete. In this embodiment, a Florida-type guardrail is used, which is thick on the bottom side of the base and thin on the upper side. Of course, the shape of the concrete guardrail 100 is not particularly limited, and it may be, for example, a single slope type, a straight wall type, or other irregular shapes.

[0023] Furthermore, the concrete protective fence 100 according to this embodiment originally has connectors 20 attached to its side surface 11, as shown in Fig. 2, so that it can be connected to other similar concrete protective fences 100. As shown in Fig. 1, the connectors 20 are provided on one or both side surfaces 11 of the main body 110, and by connecting these connectors 20 together, adjacent concrete protective fences 100 can be connected and positioned to form the protective fence 10.

[0024] As shown in FIG. 3 or 4 , the connector 20 has a hook portion 21 that functions to connect to an adjacent connector 20. The hook portion 21 is formed in a hook shape that is folded back so as to form a J-shape when viewed from above. An upper end sliding slope 24 is provided on the hook portion 21, tapering from the upper end 22 to the inner surface 23. Similarly, as shown in FIG. 3 , a lower end sliding slope 26 is provided on the lower end 25 side of the hook portion 21, tapering from the lower end 25 to the inner surface 23. These upper end sliding slope 24 and lower end sliding slope 26 allow the connectors 20 to slide along these slopes to correct their positions even if they are slightly misaligned when lowering adjacent concrete safety fences 100 from above. Note that both the upper end sliding slope 24 and the lower end sliding slope 26 do not necessarily need to be provided; either one may be provided. It is also advisable to set the angles of the upper end sliding slope 24 and the lower end sliding slope 26 to be the same. By setting them to be the same angle, it becomes easier for the adjacent concrete guardrails 100 to come into contact with each other when they are lowered from above, and damage to the connector 20 can be reduced.

[0025] Next, the resin guardrail 200 will be described. The resin guardrail 200 is made of resin with an internal cavity. The resin guardrail 200 is equipped with a water inlet 210 that can inject water into the internal cavity and a drainage section 220 that can drain the water. This resin guardrail 200 is designed so that the weight of the water is maintained by filling the cavity with water. The outer periphery 250 of the resin guardrail 200 when viewed from the side is preferably fabricated so that it is within a horizontal range of ±10 cm (a or b in Figure 5 is within 10 cm) of the outer periphery 150 of the concrete guardrail 100 when viewed from the side. Furthermore, fabricating the outer periphery within this range allows the guardrail to be constructed without violating the construction gauge regulations. It is more preferable to fabricate the outer periphery within a range of ±5 cm. By creating an outer periphery shape that falls within this range, when the concrete guardrail 100 and the resin guardrail 200 are connected, the difference in level between their front faces or back faces at the connection is within 10 cm, so that when a vehicle collides with the guardrail 10, it is possible to avoid an impact such as a vehicle hitting a corner or hitting the side of the concrete guardrail 100 or the resin guardrail 200 and bouncing back, thereby reducing the impact on the vehicle. Preferably, the outer periphery shape 250 of the resin guardrail 200 when viewed from the side is created to be the same as the outer periphery shape 150 of the concrete guardrail 100 when viewed from the side. By making the outer peripheral shapes of each guardrail the same when viewed from the side, when a vehicle collides and moves from the concrete guardrail 100 to the resin guardrail 200, or vice versa, no step is formed, and the vehicle moves as if sliding on a flat surface without colliding with the boundaries between the sides of each guardrail, thereby reducing the magnitude of the impact on the vehicle.

[0026] Furthermore, as shown in Fig. 5, the upper corners of the side surfaces of the resin protective fence 200 are notched at the top and extend laterally at the bottom. This extending portion 230 is formed with a through-hole 240 that penetrates vertically and a groove 245 that is cut from this through-hole 240 to the side surface. Using this through-hole 240 and groove 245, the resin protective fence 200 can be connected to a similar resin protective fence 200 or a concrete protective fence 100, as will be described later. Note that this through-hole 240 may be fabricated to have a taper so that the inner diameter gradually increases from the bottom to the top.

[0027] The resin guardrail 200 is preferably fabricated with rotational symmetry so that when it is rotated horizontally, it matches the shape when rotated 180 degrees horizontally from a predetermined center of rotation. By fabricating it so that it has the same shape when rotated 180 degrees, there is no need to worry about the front and back when installing it, and it can be loaded onto a truck or the like without worrying about the direction.

[0028] The longitudinal length of the resin guardrail 200 may be the same as or half the length of the concrete guardrail 100. By fabricating it in this way, no space will be created between the resin guardrail 200 and the concrete guardrail 100 when transporting them by truck or the like, and they can be loaded onto the truck in an aligned state.

[0029] When connecting resin guardrails 200 to each other, it is preferable to use a first connecting member 70 as shown in FIG. 7A. The first connecting member 70 has two parallel-arranged cylindrical or truncated cone-shaped connecting portions 72 and a plate-shaped portion 71 that secures the connecting portions 72. As shown in FIG. 7B, the first connecting member 70 is secured by inserting the connecting portions 72 into the through-holes 240 of the resin guardrails 200. By shortening the length of the plate-shaped portion 71, the resin guardrails 200 can be arranged only in a straight line, or by lengthening it, they can be arranged at an angle. Furthermore, by making the plate-shaped portion 71 truncated cone-shaped with a short diameter at the bottom and a long diameter at the top, it can be fitted into the through-holes 240, resulting in a connection without any rattle.

[0030] When connecting the concrete protective fence 100 and the resin protective fence 200, they are connected using a second connecting member 80, as shown in Figure 8A. The second connecting member 80 has a configuration in which a single cylindrical or truncated cone-shaped connecting portion 82 is joined to an L-shaped plate 81 fixed to this connecting portion 82. As shown in Figure 8B, the second connecting member 80 is fixed by inserting the cylindrical portion 72 into the through-hole 240 of the resin protective fence 200 and inserting the L-shaped plate 81 into the connector 20 of the concrete protective fence 100.

[0031] The concrete guardrail 100 and the resin guardrail 200 fabricated as described above are installed as follows. Generally, guardrails 10 that perform well are heavy, and concrete guardrails 100 provide high protection against vehicle collisions. Therefore, most guardrails 10 are constructed by connecting concrete guardrails 100 together. However, once installed, removing a concrete guardrail 100 requires heavy machinery or trucks, making it extremely difficult and tedious. Therefore, resin guardrails 200 are placed in areas where they may need to be removed, such as areas that need to be temporarily removed for periodic vehicle movement. In this case, as shown in FIG. 1 , when connecting resin guardrails 200 together, the resin guardrails 200 are first arranged adjacent to each other, and then the cylindrical portion of the first connecting member 70 is inserted into the through-hole 240 to connect them together. To connect the concrete protective fence 100 and the resin protective fence 200, the L-shaped plate 81 is inserted into the connector 20 using the second connecting member 80, and the cylindrical portion is inserted into the through-hole to connect them. Water is then poured into the resin protective fence 200 until it is full, and the protective fence is complete.

[0032] The guardrail 10 installed in this manner has a side view shape that is the same as or within ±10 cm of the resin guardrail 200 and the concrete guardrail 100, so that even if a vehicle collides with the concrete guardrail 100 and then moves to the resin guardrail 200, or vice versa, the vehicle will slide along the front without colliding with the corners or sides of the resin guardrail 200 or concrete guardrail 100, respectively, thereby ensuring safety.

[0033] Furthermore, if a portion of the protective fence needs to be removed during installation, the weight can be reduced by draining the water from the resin protective fence 200. Furthermore, because the protective fence can be removed from the connecting fittings by moving it directly upward, it can be easily moved by multiple people or with a small forklift. Furthermore, by removing the first connecting member 70 or the second connecting member 80, the resin protective fence 200 can be moved laterally at the connection between other resin protective fences 200 or between the concrete protective fence 100 and the resin protective fence 200. In this way, a portion of the protective fence 10 can be easily removed, creating a passageway in part of the protective fence 10. This is particularly effective in tunnels and other locations where the space above is narrow and lifting the fence using heavy machinery is difficult. Furthermore, if the protective fence 10 needs to be reinstalled, the resin protective fence 200 can be installed, connected to adjacent protective fences with connecting members, and then the fence can be easily reconstructed by pouring in water.

[0034] It goes without saying that the present invention is not limited to the above-described embodiments, and can be embodied in various forms as long as they fall within the technical scope of the present invention. [Industrial Applicability]

[0035] As shown in the above-described embodiment, the present invention can be industrially utilized when constructing a simple safety fence on a road surface. [Explanation of symbols]

[0036] 10...protective fence, 11...side surface, 20...connector, 21...hook portion, 22...upper end, 23...inner surface, 24...upper end sliding slope, 25...lower end, 26...lower end sliding slope, 70...first connecting member, 71...plate-shaped portion, 72...connecting portion, 80...second connecting member, 81...plate material, 82...connecting portion, 100...concrete protective fence, 110...main body, 150...peripheral shape, 200...resin protective fence, 210...water injection portion, 220...drainage portion, 230...extension portion, 240...through hole, 245...groove, 250...peripheral shape

Claims

1. a concrete protective fence having a connector on at least one side; A resin protective fence having a hollow interior that can be filled with water or drained from the hollow; Equipped with A protective fence characterized in that the resin protective fence is arranged between the concrete protective fences.

2. A protective fence as described in claim 1, characterized in that the outer peripheral shape of the resin protective fence as viewed from the side is made to be within a horizontal range of ±10 cm of the outer peripheral shape of the concrete protective fence as viewed from the side.

3. 2. The protective fence according to claim 1, wherein the outer peripheral shape of the resin protective fence as viewed from the side is the same as the outer peripheral shape of a concrete protective fence as viewed from the side.

4. 2. The protective fence according to claim 1, wherein the longitudinal length of the resin protective fence is the same as or half the length of the concrete protective fence.

5. The protective fence according to claim 1, characterized in that at least two of the resin protective fences are arranged in succession.

6. The protective fence according to claim 1, characterized in that the resin protective fence has through holes that penetrate vertically on both sides of the fence and grooves that are cut out from the through holes toward the sides.

7. A protective fence as described in claim 6, characterized in that the resin protective fences are connected to each other by a first connecting member having a plate-shaped portion and two cylindrical or truncated cone-shaped connecting portions arranged in parallel at both ends of the plate-shaped portion.

8. A protective fence as described in claim 6, characterized in that the concrete protective fence and the resin protective fence are connected by a second connecting member having a form that combines a cylindrical or truncated cone-shaped connecting portion and an L-shaped plate material.

9. The protective fence according to any one of claims 1 to 8, characterized in that the resin protective fence is rotationally symmetrical so that it coincides when rotated 180 degrees horizontally from a predetermined center of rotation.

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