AU2019204025B2

AU2019204025B2 - Rolling guard barrier and manufacturing method thereof

Info

Publication number: AU2019204025B2
Application number: AU2019204025A
Authority: AU
Inventors: Hye Ok Byon
Original assignee: Jeongdo Industry Co Ltd; SHINDO INDUSTRY CO Ltd
Current assignee: Jeongdo Industry Co Ltd; SHINDO INDUSTRY Co Ltd
Priority date: 2019-04-22
Filing date: 2019-06-07
Publication date: 2021-05-20
Anticipated expiration: 2039-06-07
Also published as: SA119400787B1; AU2019204025A1

Abstract

The present invention relates to a rolling guard barrier and a manufacturing method thereof, and more particularly, to a rolling guard barrier and a manufacturing method thereof, which can absorb shock at the time of a vehicle collision and prevent a big accident by guiding the collided vehicle in a heading direction of a road. The manufacturing method of a rolling guard barrier includes the steps of: 1) manufacturing posts; 2) manufacturing rail plates fastened to the post; 3) manufacturing rotating rollers, each of which the center penetrates through the post and the radius gets upwardly or downwardly larger; 4) installing the posts in the ground surface at predetermined intervals; 5) fastening the rail plates to lower portions of the front sides and the rear sides of the posts to form a pair of lower rails; 6) putting and mounting the two rotating rollers on another vertically to be supported on the lower rails; and 7) fastening the rail plates to upper portions of the front sides and the rear sides of the posts to form a pair of upper rails. -22- [DRAWINGS] [Fig 1] - 1/9 -

Description

[DRAWINGS]

[Fig 1]

- 1/9 -

ROLLING GUARD BARRIER AND MANUFACTURING METHOD THEREOF TECHNICAL FIELD

[01] The present disclosure relates to a rolling guard

barrier and a manufacturing method thereof, and more particularly,

to a rolling guard barrier and a manufacturing method thereof,

which can absorb shock at the time of a vehicle collision and

prevent a big accident by guiding the collided vehicle in a

heading direction of a road.

BACKGROUND

[02] With the development of the automotive industry,

the number of vehicles is increasing, and the height of vehicles

is getting higher due to enlargement of vehicles.

[03] A guard rail is installed between a road, on which

vehicles travel, and a sidewalk, on which people come and go, or

installed on a centerline of the road in order to protect people

from vehicles.

[04] A rolling guard barrier for absorbing shock at the

time of vehicle collision, stopping vehicles or guiding vehicles

in a normal heading direction of the road has been disclosed.

[05] For instance, Korean Patent Application No. 10

2009-0136281 and Korean Patent No. 1003368 disclose rolling guard

-la- barriers. Such a rolling guard barrier includes a plurality of rotating rollers.

[06] However, the rotating rollers of the conventional

rolling guard barrier are easily damaged by collision since being

made of foamed urethane, and especially, extraneous matters are

attached to the surface of the rotating rollers by pressure and

frictional heat generated at the time of collision. Moreover,

dust is stuck on the surfaces of the rotating rollers. So, the

rotating rollers may defile the appearance of the road by being

contaminated by the extraneous matters generated at the time of

collision and the dust.

[07] Furthermore, vehicles may pass over the guard rail

and fall to the other side at the time of vehicle collision.

[07A] It is desired to address or ameliorate one or more

disadvantages or limitations associated with the prior art, or to

at least provide a useful alternative.

SUMMARY

[07B] According to the present invention there is

provided a manufacturing method of a rolling guard barrier

comprising the steps of:

1) manufacturing posts, each of which having at least one

reinforcement groove vertically formed in a surface thereof and

inwardly protruding from the post;

2) manufacturing rail plates to be fastened to the posts;

3) manufacturing two rotating rollers, each of which has a

center that is penetrated by one of the posts and a radius that

gets upwardly or downwardly larger;

4) installing the posts in a ground surface at predetermined

intervals, including inserting reinforced posts into the posts,

the reinforcement grooves engaging and supporting the reinforced

posts, the reinforced posts being located above the ground and

under the ground, wherein the at least one reinforcement groove

of each of the posts is located above the ground and under the

ground;

5) fastening the rail plates to lower portions of front

sides and rear sides of the posts to form a pair of lower rails;

6) putting and mounting the two rotating rollers on top of

one another vertically to be supported on the lower rails; and

7) fastening the rail plates to upper portions of the front

sides and the rear sides of the posts to form a pair of upper

rails,

wherein in the step 6), the two rotating rollers are mounted

symmetrically in such a way that the radius of each gets larger

toward the lower portion and the upper portion from adjoining

sides thereof.

[07C] According to the present invention there is

further provided a rolling guard barrier comprising: posts with a hollow inside installed in a ground surface at regular intervals; lower rails horizontally fastened to lower portions of front sides and rear sides of the posts; upper rails horizontally fastened to upper portions of the front sides and the rear sides of the posts; and two rotating rollers rotatably disposed in such a way that one of the posts penetrates through a center of each rotating roller, wherein the two rotating rollers are put on top of one another vertically between the lower rails and the upper rails, wherein the rotating rollers are formed in such a way that a radius of each gets upwardly or downwardly larger, wherein the two rotating rollers are mounted symmetrically in such a way that the radius of each gets larger toward the lower portion and the upper portion from adjoining sides thereof, and wherein each of the posts includes at least one reinforcement groove vertically formed in a surface thereof and inwardly protruding from the post, and the reinforcement groove is located above the ground and under the ground, and wherein a reinforced post is inserted into each of the posts, the reinforcement grooves engaging and supporting the reinforced posts, and the reinforced posts are located above the ground and under the ground.

BRIEF DESCRIPTION OF THE DRAWINGS

[07D] Some embodiments of the present invention are

hereinafter described, by way of non-limiting example only, with

reference to the accompanying drawings, in which:

-4a-

[07E] FIGS. 1 to 4 are views showing a rolling guard

barrier according to an embodiment of the present disclosure;

[07F] FIG. 5 is a view showing a rotating roller of the

rolling guard barrier and a manufacturing method of the rotating

roller according to the present disclosure;

[07G] FIGS. 6 and 7 are views showing a structure and an

action of the rotating roller according to the present disclosure

in detail;

[07H] FIGS. 8 to 11 are views showing a structure and an

action of a post according to the present disclosure in detail;

and

[071] FIG. 12 is a view showing a manufacturing method

of the post according to the present disclosure.

DETAILED DESCRIPTION

[08] Accordingly, the present disclosure has been made

to solve the above-mentioned problems, and it is an object of the

present disclosure to provide a rolling guard barrier and a

manufacturing method thereof, which can absorb shock at the time

of a vehicle collision and prevent a big accident by guiding the

collided vehicle in a heading direction of a road.

[09] It is another object of the present disclosure to

provide a rolling guard barrier and a manufacturing method thereof, which ca easily wash the surface of rotating rollers contaminated by dust or vehicle collision.

[10] It is a further object of the present disclosure

to provide a rolling guard barrier and a manufacturing method

thereof, which can easily manufacture rotating rollers having

shock absorbing roller parts.

[11] It is a still further object of the present

disclosure to provide a rolling guard barrier and a manufacturing

method thereof, which can prevent run-over of a vehicle at the

time of vehicle collision.

[12] It is another object of the present disclosure to

provide a rolling guard barrier and a manufacturing method

thereof, which can easily manufacture posts or reinforced posts

to increase strength.

[13] It is a further object of the present disclosure

to provide a rolling guard barrier and a manufacturing method

thereof, which can easily combine the posts and rail plates with

each other.

[14] To accomplish the above object, according to the

present disclosure, there is provided a manufacturing method of a

rolling guard barrier including the steps of: 1) rolling a metal

plate into a cylindrical shape and welding end portions meeting

each other to manufacture a post; 2) manufacturing rail plates

fastened to the post; 3) manufacturing rotating rollers, each of which the center penetrates through the post and the radius gets upwardly or downwardly larger; 4) installing the posts in the ground surface at predetermined intervals; 5) fastening the rail plates to lower portions of the front sides and the rear sides of the posts to form a pair of lower rails; 6) putting and mounting the two rotating rollers on another vertically to be supported on the lower rails; and 7) fastening the rail plates to upper portions of the front sides and the rear sides of the posts to form a pair of upper rails.

[15] Moreover, in the step 1), at least one

reinforcement groove is vertically formed in the surface of the

post, and the reinforcement groove is located above the ground

and under the ground.

[16] Furthermore, the step 3) includes the steps of: 3

1) rotationally molding a synthetic resin material to form a

casing with a hollow inside; 3-2) forming an opening part in the

casing:

[17] 3-3) injecting mixture for foaming urethane into

the opening part; 3-4) foaming the mixture inside the casing to

form a shock absorbing roller part; and 3-5) removing a foamed

body protruding outwardly from the opening part.

[18] Additionally, in the step 4), reinforced posts are

inserted into the posts.

[19] In addition, the reinforced posts are forcedly fit

into the reinforcement grooves protruding inwardly from the post.

[20] In another aspect of the present disclosure, there

is provided a rolling guard barrier including: posts with a

hollow inside installed to have at least one reinforcement groove,

which is formed in a vertical direction and is located above the

ground and under the ground; lower rails horizontally fastened to

lower portions of the front sides and the rear sides of the

posts; upper rails horizontally fastened to upper portions of the

front sides and the rear sides of the posts; and two rotating

rollers rotatably disposed in such a way that the center

penetrates through the post, and put on another between the lower

rails and the upper rails, wherein the rotating rollers are

formed in such a way that the radius gets upwardly or downwardly

larger, and the two rotating rollers are mounted symmetrically in

such a way that the radius gets larger toward the lower portion

and the upper portion from adjoining sides thereof.

[21] Moreover, reinforced posts are inserted into the

post, and the reinforced posts are located above the ground and

under the ground.

[22] Furthermore, the reinforcement grooves protrude

inwardly from the post to support the reinforced posts.

[23] Additionally, the lower rails and the upper rails

have elongated coupling holes with a horizontal length to be

coupled with the post.

[24] Moreover, the rotating rollers and the upper rails

are spaced apart from each other at a predetermined interval.

[25] Furthermore, the rotating roller includes: a shock

absorbing roller part made of a foamed urethane material; and a

casing surrounding the outside of the shock absorbing roller part

and made of a hard synthetic resin material.

[26] Additionally, the casing has a side wall with a

round cross section.

[27] According to the present disclosure, the rolling

guard barrier and the manufacturing method thereof can prevent a

big accident by guiding the collided vehicle in a heading

direction of a road by the rotating rollers, and absorb shock at

the time of vehicle collision since having the shock absorbing

roller part made of foamed urethane.

[28] Especially, the rolling guard barrier and the

manufacturing method thereof can easily wash dust or contaminants

by rainwater even if the surface is contaminated by dust or

vehicle collision since having a casing surrounding the outside

of the shock absorbing roller part so as not to defile the

appearance of the road.

[29] Additionally, the rolling guard barrier and the

manufacturing method thereof can easily manufacture the rotating

rollers having the shock absorbing roller part by foaming

urethane inside the casing.

[30] In addition, the rolling guard barrier and the

manufacturing method thereof can prevent run-over of the vehicle

at the time of vehicle collision since the two rotating rollers

are formed in such a way as to get larger upwardly and downwardly

from adjoining sides.

[31] Moreover, the rolling guard barrier and the

manufacturing method thereof can easily manufacture posts or

reinforced posts by rolling and welding metal plates.

[32] Furthermore, the rolling guard barrier and the

manufacturing method thereof can enhance strength of the posts

since each of the posts has reinforcement grooves and the

reinforced posts are inserted into the reinforcement grooves.

[33] Additionally, the rolling guard barrier and the

manufacturing method thereof can support the reinforced posts

without using screws since the reinforcement grooves get in

contact with the reinforced posts.

[34] In addition, the rolling guard barrier and the

manufacturing method thereof can easily couple the post with the

elongated coupling hole of the rail plate.

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[41] Hereinafter, a rolling guard barrier according to

an embodiment of the present disclosure will be described in

detail with reference to the accompanying drawings.

[42] Referring to FIGS. 1 to 3, a rolling guard barrier

1 according to the present disclosure includes posts 10, rail

plates 20, and rotating rollers 3.

[43] The posts 10 are mounted in the ground surface to

be spaced apart from one another at predetermined intervals.

Moreover, post caps 13 are combined with the upper surfaces of

the posts 10.

[44] Furthermore, each of the posts 10 has two or four

reinforcement grooves 15 vertically formed in the surface of the

post at regular intervals. The post 10 is mounted in such a way

that the centers of the reinforcement grooves 15 are located on

the ground surface, and in this embodiment, the reinforcement

grooves 15 are formed to be in length of 20 cm over the ground

and under the ground on the basis of the ground surface.

[45] Additionally, the post has a reinforced post 50

disposed therein, and reinforced post 50 is also located over the

ground and under the ground on the basis of the ground surface.

[46] The rail plates 20 are combined with the post 10

in a horizontal direction. The rail plate 20 includes an upper

rail 21 combined with an upper portion of the post and a lower

rail 22 combined with a lower portion of the post, and the upper

rail 21 and the lower rail 22 are combined with each other side

by side. The upper rail 21 and the lower rail 22 are fastened to

the posts 10 by screws 11 and 12. Therefore, the upper rail 21

and the lower rail 22 have coupling holes 14 coupled with the

posts and formed in an elongated shape in a horizontal direction.

[47] The post 10 penetrates through the center of the

rotating roller 30, and the rotating rollers 30 is mounted to be

rotatable in order to absorb shock at the time of vehicle

collision and return the collided vehicle in a normal heading

direction. A reflection sheet S for leading drivers' gazes at

night is attached to the rotating roller 30. The two rotating

rollers 30 are put on another on the post, and it will be

described later in detail.

[48] Referring to FIG. 4, a plurality of auxiliary

posts 40 are disposed between the posts 10. The auxiliary posts

40 are to make the rotating rollers 30 rotatable even between the

posts 10.

[49] The auxiliary post 40 includes coupling holes 41

and 43 respectively formed at an upper portion and a lower

portion, and bolts 42 and 44 respectively inserted into the

coupling holes 41 and 43 and respectively screw-coupled with the

upper rail 21 and the lower rail 22. The auxiliary post 40 also

has a pair of rotating rollers 30A and 30B mounted to be put on

another. Furthermore, post caps 13 are covered on upper portions

of the auxiliary posts 40.

[50] Referring to FIG. 5, the rotating roller 30

according to this embodiment includes a shock absorbing roller

part 32 and a casing 31.

[51] Now, a manufacturing method of the rotating roller

30 will be described. First, molten synthetic resin is injected

into a press, and the casing 31 with a hollow inside is formed by

rotational molding (See FIG. 5(a) and 5 (b) ) . The casing is

generally formed in a cylindrical shape, is formed to get

downwardly or upwardly larger in radius, and has a through hole

31a formed therein so that the post 10 or the auxiliary post 40

is inserted into the through hole 31a. Moreover, the casing 31

has a side wall with a round cross section. If the cross section

of the side wall of the casing 31 is not round but is formed

diagonally, it cannot prevent run-over of a vehicle since the

vehicle runs over along a diagonal line. That is, the casing 31 can prevent run-over of the vehicle since the cross section of the side wall is formed round.

[52] Next, a circular opening part 34 is formed at the

upper surface or the lower surface of the casing 31 (see FIG.

5(b) and 5(c).

[53] Next, a mixture 32a for foaming urethane is

injected through the opening part 34 of the casing 31 (see FIG.

5(d)).

[54] A main ingredient of the mixture 32a is PPG of a

polyol and ether type), and a hardener and a catalyst are mixed

therein.

[55] As described above, the mixture 32a is injected

into the casing 31 and foam-molded to mold the shock absorbing

roller part 32. When the mixture 32a is injected into the casing

31 with the hollow inside and is foam-molded, the casing 31 is

closely filled with the shock absorbing roller part 32 so that

the shock absorbing roller part 32 is integrated with the casing

31. In other words, in this embodiment, the shock absorbing

roller part 32 is not inserted into the casing 31 after being

molded with urethane foam, but urethane is foamed and molded

inside the casing 31 to be integrated with the casing 31.

[56] In this instance, a foamed body 32b protrudes

through the opening part 34 (see FIG. 5(e)).

[57] Finally, the foamed body 32b protruding outwardly

through the opening part 34 is removed, then, the rotating roller

30 is manufactured.

[58] The shock absorbing roller part 32 can absorb

shock at the time of vehicle collision since being made of foamed

urethane.

[59] Especially, the casing 31 is made of a hard

synthetic resin material, such as PE.

[60] If there is no casing, the vehicle directly

collides with the shock absorbing roller part 32, and an

extraneous matter, such as a collision mark, is attached to the

surface of the shock absorbing roller part 32. So, it may defile

appearance of the road. Additionally, even if there is no

collision, dust may be attached to the surface of the shock

absorbing roller part 32.

[61] However, the rotating roller according to the

present disclosure is easy to wash out dust or contaminants with

rainwater and does not defile the appearance of the road since

the casing 31 made of the hard material surrounds the outside of

the shock absorbing roller part 32.

[62] That is, the rotating roller 30 includes the

casing 31 and the shock absorbing roller part 32, which are made

with two different materials. Therefore, the shock absorbing

roller part 32 absorbs shock generated at the time of vehicle collision to protect the driver and the vehicle, and the casing

31 which is relatively higher in hardness maintains clean

appearance.

[63] In the meantime, the casing 31 has a recess 33

formed on the outer circumferential surface thereof, and a

reflection sheet is attached to the recess 33.

[64] Referring to FIG. 6, the two rotating rollers 30A

and 30B put on another vertically are disposed between the upper

rail 21 and the lower rail 22. However, a space t3 between the

upper rail 21 and the lower rail 22 is wider than the sum t1 of

the height of the two rotating rollers 30A and 30B (t3>t1). That

is, in the state where the two rotating rollers 30A and 30B are

put on another, a predetermined space t2 exists between the upper

surface of the rotating rollers 30A and 30B and the upper rail 21.

[65] Moreover, according to the present disclosure, the

two rotating rollers 30A and 30B which are put on another

vertically are mounted to penetrate through the posts 10 or the

auxiliary posts 40.

[66] However, the two rotating rollers 30A and 30B

which are put on another vertically are symmetrically formed to

get larger in radius upwardly and downwardly from adjoining sides.

[67] That is, the rotating rollers 30A and 30B have

inclined surfaces in longitudinal section of the whole side wall or some of the side wall so that there is a section that the radius is reduced.

[68] Moreover, when the two rotating rollers 30A and

30B are put on another vertically, the two rotating rollers 30A

and 30B are laid in such a way that the radius-reduced sections

meet each other, and then, are mounted on the post 10 and the

auxiliary post 40. Therefore, the two rotating rollers 30A and

30B has a double-headed drum shape in the mounted state. As

described above, the two rotating rollers 30A and 30B are formed

in such a way that the radius of the central portion is the

smallest and the radius gets upwardly and downwardly larger in

order to effectively prevent run-over of the collided vehicle.

[69] Referring to FIG. 7, when the vehicle collides,

the upper rotating roller 30A ascends till touching the upper

rail 21 by receiving external power. In this instance, a

predetermined gap G is formed between the two rotating rollers

30A and 30B, and due to the above action, shock caused by vehicle

collision may be absorbed.

[70] Referring to FIG. 8, the post 10 according to the

present disclosure has two or four reinforcement grooves 15

vertically formed on the surface of the post 10 in order to

reinforce flexural strength or bending strength. The

reinforcement grooves 15 are formed when the surface of the post

10 is pressed by a press.

[71] Therefore, the reinforcement grooves 15 protrude

inwardly.

[72] Furthermore, the reinforced posts 50 are inserted

into the post 10 in order to reinforce flexural strength or

bending strength of the post 10. When the reinforced posts 50 are

inserted into the post 10, it is forcedly fit by the

reinforcement grooves 15 inwardly protruding from the post 10.

Therefore, the reinforcement posts 50 are supported by the

reinforcement grooves 15 (see FIG. 9).

[73] The reinforcement grooves 15 and the reinforced

posts 50 are located above the ground and under the ground on the

basis of the ground surface (see FIG. 10).

[74] Referring to FIG. 11, in case of posts which have

no reinforcement grooves 15, the reinforced posts may be coupled

and fixed to the post 10 by screws 51.

[75] FIG. 12 is a plan view showing a manufacturing

method of a post according to the present disclosure.

[76] The manufacturing method of a post according to

the present disclosure includes the steps of: preparing a metal

plate 10a with a predetermined area (see FIG. 12(a)); rolling the

metal plate 10a into a cylindrical shape using a tube mill (see

FIG. 12(b)); welding and connecting opposite both end portions of

the cylinder (see FIG. 12(c)); and removing burrs 10b of the

welded part to manufacture a post (see FIG. 12(d)). The post 10 manufactured through the above manufacturing method has a connection part 10c formed by welding. The post 10 can be formed simply at low costs without expensive extrusion equipment since being manufactured by the above method.

[77] The auxiliary posts 40 and the reinforced posts 50

may be also manufactured by the above manufacturing method.

[78] Hereinafter, a manufacturing method of the rolling

guard barrier according to the present disclosure will be

described.

[79] First, the post 10 is manufactured in order

illustrated in FIG. 12. Reinforcement grooves 15 are formed in

the surface of the post 10, and reinforced posts 50 are inserted

into the reinforcement grooves 15.

[80] Next, a metal plate with a predetermined length is

bent to form a rail plate 20.

[81] Next, rotating rollers 30 are manufactured in

order illustrated in FIG. 5.

[82] Next, the posts 10 are installed in the ground

surface at regular intervals.

[83] Next, the rail plates are coupled to lower

portions of the front sides and the rear sides of the posts 10,

so that lower rails 22 are formed.

[84] Next, the two rotating rollers 30 are mounted to

be put on another vertically so as to be supported on the lower rails 22. The two rotating rollers put on another vertically are mounted symmetrically so as to get upwardly and downwardly larger in radius.

[85] Moreover, auxiliary posts 40 are combined between

the posts, and two rotating rollers 30 are put on another

vertically on the auxiliary post (see FIG. 4).

[86] Next, the rail plates are coupled to upper

portions of the front sides and the rear sides of the posts 10,

so that upper rails 21 are formed.

[87] Throughout this specification and the claims which

follow, unless the context requires otherwise, the word

"comprise", and variations such as "comprises" and "comprising",

will be understood to imply the inclusion of a stated integer or

step or group of integers or steps but not the exclusion of any

other integer or step or group of integers or steps.

[88] The reference in this specification to any prior

publication (or information derived from it), or to any matter

which is known, is not, and should not be taken as an

acknowledgment or admission or any form of suggestion that that

prior publication (or information derived from it) or known

matter forms part of the common general knowledge in the field of

endeavour to which this specification relates.

Claims

The claims defining the invention are as follows:

1. A manufacturing method of a rolling guard barrier

comprising the steps of:

1) manufacturing posts, each of which having at least one

reinforcement groove vertically formed in a surface thereof and

inwardly protruding from the post;

2) manufacturing rail plates to be fastened to the posts;

3) manufacturing two rotating rollers, each of which has a

center that is penetrated by one of the posts and a radius that

gets upwardly or downwardly larger;

4) installing the posts in a ground surface at predetermined

intervals, including inserting reinforced posts into the posts,

the reinforcement grooves engaging and supporting the reinforced

posts, the reinforced posts being located above the ground and

under the ground, wherein the at least one reinforcement groove

of each of the posts is located above the ground and under the

ground;

5) fastening the rail plates to lower portions of front

sides and rear sides of the posts to form a pair of lower rails;

6) putting and mounting the two rotating rollers on top of

one another vertically to be supported on the lower rails; and

7) fastening the rail plates to upper portions of the front

sides and the rear sides of the posts to form a pair of upper

rails,

wherein in the step 6), the two rotating rollers are mounted

symmetrically in such a way that the radius of each gets larger

toward the lower portion and the upper portion from adjoining

sides thereof.

2. The manufacturing method of a rolling guard barrier

according to claim 1, wherein the step 3) includes the steps of:

3-1) rotationally molding a synthetic resin material to form

a casing with a hollow inside;

3-2) forming an opening part in the casing:

3-3) injecting mixture for foaming urethane into the opening

part;

3-4) foaming the mixture inside the casing to form a shock

absorbing roller part; and

3-5) removing a foamed body protruding outwardly from the

opening part.

3. A rolling guard barrier comprising:

posts with a hollow inside installed in a ground surface at

regular intervals; lower rails horizontally fastened to lower portions of front sides and rear sides of the posts; upper rails horizontally fastened to upper portions of the front sides and the rear sides of the posts; and two rotating rollers rotatably disposed in such a way that one of the posts penetrates through a center of each rotating roller, wherein the two rotating rollers are put on top of one another vertically between the lower rails and the upper rails, wherein the rotating rollers are formed in such a way that a radius of each gets upwardly or downwardly larger, wherein the two rotating rollers are mounted symmetrically in such a way that the radius of each gets larger toward the lower portion and the upper portion from adjoining sides thereof, and wherein each of the posts includes at least one reinforcement groove vertically formed in a surface thereof and inwardly protruding from the post, and the reinforcement groove is located above the ground and under the ground, and wherein a reinforced post is inserted into each of the posts, the reinforcement grooves engaging and supporting the reinforced posts, and the reinforced posts are located above the ground and under the ground.

4. The rolling guard barrier according to claim 3, wherein

the rotating rollers and the upper rails are spaced apart from

each other at a predetermined interval.

5. The rolling guard barrier according to claim 3, wherein

each rotating roller includes:

a shock absorbing roller part made of a foamed urethane

material; and

a casing surrounding an outside of the shock absorbing

roller part and made of a hard synthetic resin material.

【DRAWINGS】

【Fig 1】 2019204025

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【Fig. 2】 2019204025

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【Fig. 6】 2019204025

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【Fig. 8】 2019204025

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【Fig. 10】 2019204025

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