KR20070008866A - Guard fence - Google Patents

Abstract

A guard fence is provided to increase rigidity of a support and a guard pipe and preclude a vehicle from being separated from the fence to the sidewalk or the opposed road by connecting the support and the guard pipe by the damping filler. A guard fence comprises plural supports vertically installed at the road side or the median strip; plural guard pipes(5) combined with the supports and horizontally extended; and a combining unit combining the guard pipes with the support. The support contains a support body integrally combining outer and inner pipe members(41,43) by a damping filler, a rod(50) extended in the inner pipe member, and a cap(60) screwed at both ends of the rod to extend the rod and press the prestress.

Description

Protective fence {GUARD FENCE}

1 is a perspective view showing a protective fence according to the prior art.

Figure 2 is an exploded perspective view showing an embodiment of the protective fence according to the present invention.

Figure 3a is a cross-sectional view showing another embodiment of the fence fence according to the present invention.

Figure 3b is a sectional view showing another embodiment of the fence fence according to the present invention.

4 is a view schematically showing a deformation state of the guard pipe during the collision of the vehicle fence fence according to the present invention.

Explanation of symbols on the main parts of the drawings

 1: protective fence

 3: Shoring 5: Guard Pipe

10: holding body 11: outer pipe member

13 inner pipe member 15 damping filler

20: Load 30: Cap

40: guard pipe body 41: outer pipe member

43: inner pipe member 45: damping filling

50: rod 60: cap

100: protection fence according to the prior art

The present invention relates to a protective fence, and more particularly, by applying a pre-stressing method to the pillar and / or guard pipe of the double pipe structure interposed damping filler material significantly increases the rigidity by the vehicle to the sidewalk or the opposite lane It is possible to prevent departure from the vehicle, and to minimize most of the collision energy through the plastic deformation of the steel, the damping force of the damping filler, and the complementary action of the prestressing to minimize the injuries of the occupants and the damage of the vehicle. It is about a protective fence.

The present invention also provides a significant rigidity compared to the amount of steel used by applying the prestressing method to the support and / or guard pipe formed of a double pipe structure interposed damping filler material, thereby reducing the amount of steel and the material cost It is about a fence fence that can be saved.

In general, the fence fence prevents the vehicle from escaping from the normal driving path to the sidewalk or the opposite lane while absorbing the collision energy through plastic deformation during the collision, thereby minimizing the passenger's injury and damage to the vehicle. It is a facility installed on a roadside, sidewalk / roadway boundary, or central divider to reduce the speed and return the vehicle outside the normal driving path to the normal driving direction.

The above-mentioned protective fence is largely a flexible protective fence whose main function is to absorb shock energy while accompanying some deformation when the vehicle collides, and to return the vehicle in the normal driving direction, for example, all It can be divided into a rigid fence fence formed of a structure that is not deformed, such as a concrete structure of the above, wherein the above-mentioned flexible fence fence is also formed of a structure supporting the beams connected to each other, the bending and tension against the collision of the vehicle It is divided into a beam-type fence fence that resists resistance and a cable-type fence fence that guards against collision in a vehicle, and is formed by a structure supported by a pre-stretched cable that has been given tension in advance. do.

The most popular type of protective fences are guard rail type fences that are formed by struts of corrugated cross-section beams as struts. A box beam type protection formed by a guard pipe type fence formed by a structure supported by a beam, and a large square pipe connected to each other as a beam, and a structure supported by the square pipe as a support. Fence, etc. Here, the guardrail type fence has a moderate rigidity and toughness, the plastic deformation during the collision of the vehicle is large, while the replacement of the damaged part is easy and the effect of inducing the eyes depending on the installation location has a great advantage. Guard guard type fences are functionally similar to guardrail type fences, but guard rail type fences Compared with its good view and comfort, it lacks the function of inducing eyes and is difficult to construct. Box beam type fences resist bending by vehicle and are used mainly as a separator because there is no distinction between front and rear.

The condition of high safety fence is that it has the stiffness to prevent the vehicle from escaping to the sidewalk or the opposite lane in the event of a collision, while absorbing the impact of the collision as much as possible to secure the safety of passengers and minimize the damage of the vehicle. It has a shock absorption performance that can be. However, in general, since the rigidity and impact absorption performance of the protective fence is inversely related to each other, it is necessary to consider the improvement of the rigidity and the improvement of the impact absorption performance in a balanced manner.

According to the impact severity (IS), which is the kinetic energy of the vehicle, the protection fence is classified into SB1 class with 60 kJ standard shock and SB7 class with 600 kJ standard shock. According to the appropriate grade is selected and used.

1 shows a fence fence 100 according to the prior art.

As shown in FIG. 1, the fence fence 100 according to the related art includes a plurality of supports 110 installed vertically on a roadside or a central separator, and a cap 120 coupled to an open upper end of the supports 110, respectively. And a plurality of guard pipes 130 horizontally coupled to the support posts 110 and coupling means 140 for coupling the guard pipe 130 to the support posts 110.

However, in the case of the protective fence 100 according to the prior art described above, as the support 110 and the guard pipe 130 are formed in a hollow shape, the second moment of the cross section which is the resistance moment to the moment generated by the external force Is relatively small, if a significant external force is applied due to a vehicle crash, not only the support 110 and the guard pipe 130 can be easily damaged, but also in a severe case, the crashed vehicle is separated into a sidewalk or an opposite lane to cause a large accident. There is a problem that can result.

In addition, when the strut 110 and the guard pipe 130 are bent due to a vehicle collision, a buckling phenomenon is likely to occur, and when the strut 110 and the guard pipe 130 are not replaced, they serve as protective fences. Another problem is that it does not function at all.

In addition, in the case of the protective fence 100 according to the prior art described above, excessive shocks generated during a vehicle crash, as the impact energy is absorbed depending on the plastic deformation of the support 110 and the guard pipe 130 without damping. There is a problem that can not effectively absorb the energy can not effectively reduce the injury of the occupants.

It is therefore an object of the present invention to provide a protective fence which allows the vehicle to be almost completely prevented from leaving the sidewalk or the opposite lane by significantly increasing the rigidity of the struts and / or guard pipes.

It is another object of the present invention to provide a protective fence to minimize the injury of the occupants and the damage of the vehicle by effectively absorbing the collision energy during vehicle collision.

Still another object of the present invention is to provide a protective fence to reduce the amount of steel and the material cost accordingly by exhibiting a significant rigidity compared to the amount of steel used.

Objects of the present invention described above, a protection comprising a plurality of struts installed vertically on a roadside or a median separator, a plurality of guard pipes coupled to the struts and extending horizontally, and coupling means for coupling the guard pipes to the struts. In the fence, the support includes a support body formed by being integrally coupled by a damping filler in which the outer pipe member and the inner pipe member are filled between the two pipe members, a rod extending in the inner pipe member of the support body, and both ends of the rod. It is achieved by providing a protective fence, characterized in that it comprises a cap that is respectively screwed into, and tensions the rod according to the rotation in a predetermined direction, while applying a prestress and compressing the support body in the axial direction to apply the prestress.

The above object of the present invention also includes a plurality of struts installed vertically on a roadside or a median separator, a plurality of guard pipes horizontally coupled to the struts, and coupling means for coupling the guard pipes to the struts. In the protective fence, the guard pipe, the guard pipe body is formed integrally coupled by the damping filling is filled between the outer pipe member and the inner pipe member between the two side pipe member, the rod extending in the inner pipe member of the guard pipe body and , Respectively, screwed to both ends of the rod, and provided with a protective fence, characterized in that it comprises a cap for applying the prestress by compressing the guard pipe body in the axial direction while applying the prestress by tensioning the rod as it rotates in a predetermined direction. Is achieved by.

According to a preferred feature of the present invention, a guard comprising a plurality of struts installed vertically on a roadside or a median separator, a plurality of guard pipes coupled to the struts and extending horizontally, and coupling means for coupling the guard pipes to the struts. In the fence, the support includes a support body formed by being integrally coupled by a damping filler in which the outer pipe member and the inner pipe member are filled between the two pipe members, a rod extending in the inner pipe member of the support body, and both ends of the rod. And a cap coupled to each other, and including a cap for tensioning the rod according to the rotation in a predetermined direction to apply prestress and compressing the support body in the axial direction to apply the prestress. The guard pipe includes an outer pipe member and an inner pipe member. It is formed integrally coupled by the damping filling is filled between the two side pipe member The depipe body, the rod extending in the inner pipe member of the guard pipe body, and screwed to both ends of the rod, respectively, and the pre-stress is applied by tensioning the rod according to rotation in a predetermined direction, and at the same time the guard pipe body in the axial direction It is achieved by providing a protective fence, characterized in that it comprises a cap that compresses to prestress.

According to a more preferred feature of the present invention, the shape of the above-described post main body and the guard pipe main body may have a cross-sectional shape of a circle, a square or a polygon.

According to a more preferred feature of the present invention, the damping filler of the above-described support body and / or guard pipe body is formed of an incompressible mixture of one or more of sand, stone powder, sawdust, rice husk in asphalt liquid, It provides an appropriate damping force and increases rigidity by integrally connecting both pipe members of the support body.

According to an even more preferable feature of the present invention, a thread is formed at both ends of the rod and / or the guard pipe described above, and a screw hole to which both ends of the rod are respectively coupled to the cap of the support and / or the guard pipe is formed. .

According to an even more preferable feature of the present invention, the above-mentioned struts and / or guard pipes absorb the impact energy primarily by the plastic deformation of the strut body having the compressive stress, and by the damping force of the damping filler. Secondly, the impact energy is absorbed, and the impact energy is absorbed by the rod having the tensile stress.

According to a further preferred feature of the present invention, the above-mentioned coupling means is a base plate positioned on the back side of the support, and the guard pipe is fastened to both sides of the support so that the guard pipe is fixed to the support and both ends thereof are fastened to the base plate. Includes two U-shaped bolts.

According to a still further preferred feature of the present invention, a spacer is interposed between the post and the guard pipe described above.

According to an even more preferable feature of the present invention, the above-mentioned spacer is formed of a plastic material and absorbs the shock while being destroyed in a vehicle crash.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are intended to explain in detail enough that those skilled in the art to which the present invention pertains can easily carry out the present invention. However, this does not mean that the technical spirit and scope of the present invention are limited.

FIG. 2 shows a partial perspective view of the protective fence 1 according to the present invention, and FIG. 3A shows a sectional view of the guard pipe 40 before applying the prestress in the protective fence 1 according to the present invention. The operation cross section of the guard pipe 40 after prestressing is shown.

The fence fence 1 according to the present invention is installed on a roadside, a sidewalk / roadway boundary, or a center separator, and prevents a vehicle that is out of the normal driving path during the driving from leaving the sidewalk or the opposite lane and at the same time, restarts the vehicle. It returns to the normal driving direction, and absorbs collision energy through mutual deformation of plastic deformation, damping force and prestress during vehicle collision, thereby minimizing occupant injury and damage to the vehicle. As shown, a plurality of struts 3 installed vertically on a roadside or a median separator, a plurality of guard pipes 5 coupled to the struts 3 and extending horizontally, and guard pipes on the struts 3 And engaging means (7) for engaging (5).

Here, the support (3) is to ensure that the guard pipe (5) is integrally coupled to the lower end is embedded into the ground or concrete, such as roadside or median separator, the outer pipe member 11 and the inner pipe member (13) ) Is a support body (10) formed integrally coupled by the damping filler (15) is filled between the two pipe members (11, 13), and the rod extending in the inner pipe member (13) of the support body (10) 20) and the caps respectively screwed to both ends of the rod 20, and the rod 20 is tensioned according to the rotation in a predetermined direction to apply prestress, and at the same time to compress the support body 10 in the axial direction to apply the prestress. (30).

The holding body 10 includes an outer pipe member 11 exposed to an outer surface and an inner pipe member 13 spaced apart from the inside of the outer pipe member 11 between the two pipe members 11 and 13. It has a double pipe structure that is integrally coupled by a damping filling material 15 injected into the space.

The outer pipe member 11 and the inner pipe member 13 may be formed of a metal material such as, for example, a carbon steel pipe for general structure, and may be manufactured in a cross-sectional shape of a circular or polygonal shape, and the damping filler material 15 may be a holding body ( 10) by providing a damping force to significantly improve the shock absorption performance and at the same time to connect the two pipe members (11, 13) integrally to increase the rigidity, sand, stone powder, sawdust, chaff to asphalt liquid It is preferred that at least one of them be formed of a mixed incompressible mixture.

The rod 20 extends in the inner pipe member 13 of the above-described post main body 10, and the rod 20 is screwed at both ends of the cap 30, which will be described later. As the prestress (tensile stress) is applied to the rotation, the prestress (compressive stress) is applied to the strut body 10 by pulling the cap 30 while simultaneously reinforcing the strut body 10. It is formed of a steel wire, and threads 21 are formed on the outer circumferential surface at both ends thereof so as to be respectively screwed into the screw holes (not shown) of the cap 30.

Cap 30 is coupled to both ends of the rod 20 described above, the cap 30 is in close contact with both ends of the support main body 10 by the prestress (tensile stress) of the rod 20 is the holding main body 10 ) Pre-stress (compressive stress) is applied to the), and is formed of a metal material such as carbon steel pipe for general structure. In addition, the cap 30 is formed with a projection 31 which is inserted into the inner pipe member 13 of the support body 10 is fixed, the projection 31 is formed with a screw hole for screwing both ends of the rod (20) .

Therefore, when the cap 30 is rotated in a predetermined direction in the initial state, both ends of the rod 20 are further tensioned into the screw holes of the cap 30 while the rod 20 having both ends screwed to the cap 30 is gradually tensioned. As a result, the rod 20 is held at both ends of the cap 30 with prestress (tensile stress) applied thereto. In order to enable the aforementioned prestressing, the length of the rod 20 is slightly shorter than that of the support body 10.

When the rotation of the cap 30 is stopped in this state, the cap 30 compresses the support body 10 by the prestress (tensile stress) of the rod 20, and as a result, the support body 10 is prestressed ( Tensile stress) is maintained.

The prestress (tensile stress, compressive stress) applied to the support 3 thus increases the rigidity of the support 3 significantly and at the same time increases the shock absorbing performance.

A plurality of guard pipes 5 are coupled to the posts 3 and extend horizontally. The guard pipes 5 exhibit rigidity and shock absorbing performance directly against vehicle collisions. Although somewhat different, it is formed similarly to the configuration of the post (3) described above.

That is, the guard pipe 5 is also integrally coupled by the damping filler 45 filled with the outer pipe member 41 and the inner pipe member 43 between the two side pipe members 41 and 43, similarly to the support 3. The guard pipe body 40 to be formed, the rod 50 extending in the inner pipe member 43 of the guard pipe body 40, and screwed to both ends of the rod 50, respectively, to rotate in a predetermined direction Accordingly, the rod 50 includes a cap 60 for applying prestress by compressing the support body 40 in the axial direction while simultaneously applying prestress to the rod 50.

The above-described guard pipe 5 is preferably coupled to the upper side and the lower side of the strut 3, respectively, in the case of small vehicles such as passenger cars, the lower body of the guard pipe 5 is coupled to the lower side of the strut 3 In this case, the impact energy of the small vehicle is relatively small so that the rigidity and shock absorbing performance of the guard pipe 5 coupled to the lower side of the support 3 can serve as a fence fence, but such as a truck and a bus. In the case of a large vehicle, the vehicle body is high and collides with the guard pipe 5 coupled to the upper and lower sides of the strut 3 simultaneously. In this case, the rigidity of the guard pipe 5 coupled to the upper and lower sides of the strut 3 is achieved. And through the complementary performance of the shock absorbing performance it becomes possible to play a role of the protective fence.

The guard pipe body 40 includes an outer pipe member 41 exposed to an outer surface and an inner pipe member 43 spaced apart from the inside of the outer pipe member 41 between the two pipe members 41 and 43. It has a structure that is integrally coupled by the damping filling material 45 is injected into the space of the filling.

The outer pipe member 41 and the inner pipe member 43 may be formed of a metal material such as, for example, a carbon steel pipe for general structure, and may be manufactured in a circular or polygonal cross-sectional shape, and the damping filler 45 may include a guard pipe body. By providing a damping force to the (40) to significantly improve the shock absorption performance and at the same time to connect the two pipe members (41, 43) integrally to increase the stiffness significantly, sand, stone powder, sawdust, chaff to the asphalt liquid It is preferred that at least one of them be formed of a mixed incompressible mixture.

The rod 50 is extended in the inner pipe member 43 of the guard pipe body 40 described above, and the rod 50 is screwed at both ends of the cap 60, which will be described later, and the cap 60. As the pre-stress (tensile stress) is applied to the rotation of the guard pipe, the guard pipe main body 40 is reinforced and at the same time the cap 60 is pulled out so that the prestress (compressive stress) is applied to the guard pipe main body 40. In this case, the wires 51 are formed of steel wires, and threads 51 are formed on the outer circumferential surfaces of both ends thereof so as to be respectively screwed into the screw holes 63 of the cap 60.

Cap 60 is coupled to both ends of the rod 50 described above, the cap 60 is in close contact with both ends of the guard pipe main body 40 by the prestress (tensile stress) of the rod 50, the guard pipe main body Prestress (compressive stress) is applied to 40, and is formed of a metal material such as, for example, a carbon steel pipe for general structure. In addition, the cap 60 is formed with a projection 61 which is inserted into the inner pipe member 43 of the guard pipe body 40 and is fixed, and the projection 61 is a screw hole for screwing both ends of the rod 50 ( 63) is formed.

Therefore, when the cap 60 is rotated in a predetermined direction in the initial state, as shown in FIG. 3, both ends of the rod 50 are gradually tensioned while the rod 50, which is screwed at both ends to the cap 60, is gradually tensioned. It is pushed further into the screw hole 63 of the cap 60, and as a result, the rod 50 is held at both ends fixed to the cap 60 in the state that prestress (tensile stress) is applied. In order to enable the above-described prestressing, the length of the rod 50 is slightly shorter than that of the guard pipe main body 40.

When the rotation of the cap 60 is stopped in this state, the cap 60 compresses the guard pipe main body 40 by the prestress (tensile stress) of the rod 50, and as a result, the guard pipe main body 40 is Prestress (tensile stress) is maintained.

The prestress (tension stress, compressive stress) applied on the guard pipe 5 not only increases the rigidity of the guard pipe 5 but also increases the shock absorbing performance.

The protective fence 1 according to the present invention has a first embodiment in which only the support 3 is formed in the double pipe structure described above, and the guard pipe 5 is formed in a known structure such as a general pipe, and the guard pipe 5. ) Is formed of the above-described double pipe structure, and the post 3 is formed of a known structure such as a general pipe, and both the support 3 and the guard pipe 5 are formed of the above-described double pipe structure. It can be formed as a third embodiment.

The above-described guard pipe 5 is coupled to the support 3 by means of a coupling means 7, which coupling means 7 includes a base plate 7a located on the back side of the support 3 and a guard pipe ( The guard pipe 5 is hung from both sides of the support 3 so that 5) is tightly fixed to the support 3, and both ends thereof include two U-shaped bolts 7b fastened to the base plate 7a. Although preferably formed, coupling means of known construction for connecting two pipes which intersect vertically can also be used. The base plate 7a is formed with a through hole 7c through which the end of the U-shaped bolt 7b penetrates, and a nut 7d is fastened to the end of the U-shaped bolt 7b through the through-hole 7c. .

Before the guard pipe 5 is coupled to the support 3 by the coupling means 7, both ends adjacent to each other are integrally connected by a predetermined connection pipe (not shown), and then the coupling means 7 It is preferable to be coupled to the support (3) by).

A spacer 9 is preferably interposed between the support 3 and the guard pipe 5 coupled by the coupling means 7, which spacer 9 is guard pipe relative to the support 3. At the same time as the (5) to be spaced apart by a predetermined distance, at the same time to mitigate the impact transmitted from the guard pipe (5) to be delivered to the support (3), for example, formed of a plastic material, when the vehicle crash It is formed into a structure that absorbs shock while being destroyed.

4 shows a virtual state diagram in which the vehicle 200 collides with the protective fence 1 according to the present invention. Hereinafter, with reference to Figure 4, the overall operation of the protective fence (1) according to the present invention will be described in detail.

As shown in FIG. 4, when the vehicle 200 breaks away from the normal driving path and collides with the protective fence 1 according to the present invention, the protective fence 1 according to the present invention includes a rigid body and a damping body at the same time. The prestressing method is applied to the struts 3 and / or guard pipes 5 to further increase the rigidity of the struts 3 and / or guard pipes 5 without leaving the vehicle 300 on the sidewalk or in an opposing lane or the like. It will return to normal driving direction again.

When impact energy is applied to the protective fence 1 according to the present invention due to the collision of the vehicle 200, the impact energy due to the collision of the vehicle 200 is primarily the plastic deformation and damping of the guard pipe 5 It is absorbed in large part by the damping force by the filling material 45, and is secondarily absorbed by the breakage of the spacer 9, and is in turn subject to the plastic deformation of the strut 3 and the damping force by the damping filler 15. By being absorbed in large part, it is possible to minimize the injury of the occupant and the damage of the vehicle 200.

In this case, the protective fence 1 according to the present invention, through the above-described stiffness and shock energy absorption, the collision vehicle 200 is not stopped suddenly after the collision, or fall down and do not stop in the roadway to have a great effect on the subsequent vehicle. The speed after the collision is 60% or more of the collision speed, and the vehicle departure angle after the collision is 60% or less of the collision angle, so as not to have a great influence on the opposite vehicle or the vehicle traveling in parallel.

In the case where the vehicle 200 collides with the protective fence 1 according to the present invention, the support body 10 and the guard pipe body 40 firstly undergo plastic deformation, for example, from circular to elliptical. The impact energy is absorbed, and the impact energy is secondarily absorbed by the damping force of the damping fillers 15 and 45, and the impact energy is finally absorbed by the prestress applied to the strut 3 and the guard pipe 5. As it is, the shock absorbing performance of the protective fence (1) according to the present invention will be significantly improved.

As described above, according to the protective fence according to the present invention, as the support and / or guard pipe is formed of a double pipe structure connected to each other by the damping filler and the prestressing method is applied, the rigidity of the support and / or guard pipe This remarkable increase can almost completely prevent the vehicle from leaving the sidewalk, the opposite lane, or the like.

 In addition, damping force is provided to the support and / or guard pipe by the damping filler filled between the double pipes, thereby absorbing most of the collision energy through the damping force by the damping filler as well as the plastic deformation of the double pipe during vehicle collision. There is an advantage to minimize the injury and damage of the vehicle.

In addition, by providing a significant rigidity compared to the amount of steel used by the double pipe structure and rod of the support and / or guard pipe, there is an excellent effect that can reduce the amount of steel and the resulting material costs.

In addition, disassembly and assembly itself is very easy, and there is a side effect of convenient maintenance.

Claims (14)

In the fence fence including a plurality of struts installed vertically on a roadside or a median separator, a plurality of guard pipes coupled to the struts and extending horizontally, and coupling means for coupling the guard pipes to the struts. The prop is A support body integrally coupled to the outer pipe member and the inner pipe member by a damping filler filled between the two pipe members; A rod extending in the inner pipe member of the support body; Caps are screwed to both ends of the rod, respectively, and the cap is applied to the prestress by compressing the support body in the axial direction while applying the prestress by tensioning the rod according to the rotation in a predetermined direction; . In the fence fence including a plurality of struts installed vertically on a roadside or a median separator, a plurality of guard pipes coupled to the struts and extending horizontally, and coupling means for coupling the guard pipes to the struts. The guard pipe, A guard pipe body in which the outer pipe member and the inner pipe member are integrally formed by a damping filler filled between both pipe members; A rod extending in the inner pipe member of the guard pipe body; A cap coupled to both ends of the rod, the cap for tensioning the rod according to rotation in a predetermined direction to apply prestress and simultaneously compressing the guard pipe body in the axial direction to apply the prestress. fence. In the fence fence including a plurality of struts installed vertically on a roadside or a median separator, a plurality of guard pipes coupled to the struts and extending horizontally, and coupling means for coupling the guard pipes to the struts. The prop is A support body integrally coupled to the outer pipe member and the inner pipe member by a damping filler filled between the two pipe members; A rod extending in the inner pipe member of the support body; A cap coupled to both ends of the rod and tensioning the rod according to a rotation in a predetermined direction to apply prestress and simultaneously compressing the support body in the axial direction to apply the prestress. The guard pipe, A guard pipe body in which the outer pipe member and the inner pipe member are integrally formed by a damping filler filled between both pipe members; A rod extending in the inner pipe member of the guard pipe body; A cap coupled to both ends of the rod, the cap for tensioning the rod according to rotation in a predetermined direction to apply prestress and simultaneously compressing the guard pipe body in the axial direction to apply the prestress. fence. The method according to claim 1 or 3, Both side pipe members of the support body has a protective fence, characterized in that it has a circular or polygonal cross-sectional shape. The method of claim 2 or 3, Both sides of the guard pipe body of the guard pipe fence, characterized in that it has a circular or polygonal cross-sectional shape. The method according to claim 1 or 3, The damping filling material of the support body is formed of an incompressible mixture in which at least one of sand, stone powder, sawdust, and chaff is mixed with asphalt liquid, thereby providing an appropriate damping force to the support body and at the same time integrating both pipe members of the support body. Protective fence, characterized in that to increase the rigidity by connecting. The method of claim 2 or 3, The damping filling material of the guard pipe body is formed of an incompressible mixture in which at least one of sand, stone powder, sawdust, and chaff is mixed with asphalt liquid, thereby providing an appropriate damping force to the support body and at the same time, both pipe members of the guard pipe body. Protective fences, characterized in that to increase the rigidity by connecting them integrally. The method according to claim 1 or 3, Threads are formed at both ends of the rod of the support, and the cap is formed in the cap of the support is formed with threaded holes respectively coupled to both ends of the rod. The method of claim 2 or 3, Threads are formed at both ends of the rod of the guard pipe, the cap of the guard pipe is a protective fence, characterized in that each of the threaded holes are formed to be coupled to each end of the rod. The method according to claim 1 or 3, The rods absorb the impact energy primarily by the plastic deformation of the pillar body having the compressive stress, the secondary energy absorbed the impact energy by the damping force of the damping packing, and the rod having the tensile stress during the vehicle crash. Protective fence, characterized in that by absorbing the impact energy in the third. The method of claim 2 or 3, When the vehicle crashes, the guard pipe primarily absorbs the impact energy by plastic deformation of the guard pipe main body having a compressive stress, absorbs the impact energy secondarily by the damping force of the damping filler, and absorbs tensile stress. The fence is a protective fence, characterized in that for absorbing the impact energy in the third by the rod. The method according to any one of claims 1 to 3, The coupling means includes a base plate positioned on the rear side of the support, and two U-shaped ends of which are connected to the base plate after the guard pipe is fastened on both sides of the support so that the guard pipe is fixed to the support. Protective fence, characterized in that it comprises a bolt. The method of claim 12, A protective fence, characterized in that a spacer is interposed between the support and the guard pipe. The method of claim 13 The spacer is formed of a plastic material, the protective fence, characterized in that to absorb the shock while being destroyed in a vehicle crash.

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