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KR100738589B1 - Vehicle road departure prevention device - Google Patents

Vehicle road departure prevention device Download PDF

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Publication number
KR100738589B1
KR100738589B1 KR1020060121580A KR20060121580A KR100738589B1 KR 100738589 B1 KR100738589 B1 KR 100738589B1 KR 1020060121580 A KR1020060121580 A KR 1020060121580A KR 20060121580 A KR20060121580 A KR 20060121580A KR 100738589 B1 KR100738589 B1 KR 100738589B1
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KR
South Korea
Prior art keywords
vehicle
rotation
display
support member
road
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KR1020060121580A
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Korean (ko)
Inventor
김성주
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(주)해석
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Priority to KR1020060121580A priority Critical patent/KR100738589B1/en
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Publication of KR100738589B1 publication Critical patent/KR100738589B1/en

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
    • E01F15/02—Continuous barriers extending along roads or between traffic lanes
    • E01F15/04—Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips supported above ground at spaced points
    • E01F15/0492—Provisions for guiding in combination with rails, e.g. tyre-gutters
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/604—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
    • E01F9/608—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings for guiding, warning or controlling traffic, e.g. delineator posts or milestones
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/604—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
    • E01F9/615—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings illuminated
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F19/00—Advertising or display means not otherwise provided for
    • G09F19/22—Advertising or display means on roads, walls or similar surfaces, e.g. illuminated

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Traffic Control Systems (AREA)

Abstract

A run-off-road prevention system of a vehicle is provided to prevent a vehicle from running off the road and to prevent a secondary accident of a rear vehicle by checking whether a front vehicle is in an accident or not. The run-off-road prevention system of a vehicle comprises a support member(10) installed to the ground and composed of a cap(12) and a main body(11) connected to the cap, a run-off-road preventive rotary body(20) composed of a rotary shaft(21) fixed to the support member rotatively and a guide(22) fixed to the outer circumferential surface of the rotary shaft, a rotation detector(30) installed to the inner circumferential surface of the main body of the support member to detect the rotation and speed of the run-off-road preventive rotary body, a display(40) placed to report accidents to the vehicle through an LED device, a signal light, a speaker, etc., and a controller(50) controlling the operation of the display with the signals transferred from the rotation detector and outputting warning message through the display.

Description

차량 도로이탈 방지장치{Apparatus blocking the vehicles to leave from a road} Apparatus blocking the vehicles to leave from a road}

도 1은 본 발명에 따른 차량 도로이탈 방지장치의 단면도이고,1 is a cross-sectional view of the vehicle road departure prevention apparatus according to the present invention,

도 2는 본 발명에 따른 차량 도로이탈 방지장치의 작용상태를 도시한 것이다.Figure 2 shows the operating state of the vehicle road departure prevention apparatus according to the present invention.

-첨부도면의 주요 부분에 대한 용어 설명-Explanation of terms for the main parts of the attached drawings

10; 지지부재 20; 이탈방지용 회전체10; Support member 20; Detachment Rotator

21; 회전축 22; 가이드21; Axis of rotation 22; guide

30; 회전감지기구 40; 디스플레이       30; Rotation sensing mechanism 40; display

50; 제어부 50; Control

본 발명은 차량 도로이탈 방지장치에 관한 것으로, 도로로부터 차량의 이탈을 방지하고, 이탈된 차량을 확인할 수 있는 도로이탈 방지장치에 관한 것이다.The present invention relates to a vehicle road departure prevention apparatus, and relates to a road departure prevention apparatus capable of preventing the departure of the vehicle from the road and confirming the departure of the vehicle.

종래의 차량 도로이탈 방지장치는 바닥에 콘크리트가 매설되고, 콘크리트의 상면에 받침부재가 고정체결되며, 축이 받침부재를 관통하여 콘크리트에 고정되었다. In the conventional vehicle road departure prevention device concrete is embedded in the floor, the support member is fastened to the upper surface of the concrete, the shaft is fixed to the concrete through the support member.

상기 축의 외주면에는 회전가능하게 타이어가 고정되어, 차량이 도로이탈 방지장치에 부딪혔을 때, 타이어가 회전하면서 충격을 흡수하고, 차량을 굴절시켜 차량을 안전하게 정차시킬 수 있었다.The tire is rotatably fixed to the outer circumferential surface of the shaft, and when the vehicle hits the road departure prevention device, the tire rotates to absorb the shock and deflect the vehicle to safely stop the vehicle.

하지만, 종래의 차량 도로이탈 방지장치는 급격한 코너에서 전방 차량에 사고가 났을 시 전방 차량에 대해서는 안전보호를 할 수 있지만, 후방에 쫓아오는 차량이 전방 차량의 사고 유무를 확인할 수 없어, 후방 차량의 2차적인 사고가 발생할 수 있다. However, the conventional vehicle road departure prevention device can provide safety protection for the front vehicle when an accident occurs in the front vehicle at a sharp corner, but the vehicle chasing in the rear cannot confirm the accident of the front vehicle. Secondary accidents can occur.

본 발명은 상기와 같은 문제를 해소하기 위해 발명된 것으로, 차량의 도로이탈을 방지함은 물론, 전방 차량의 사고 유무를 확인할 수 있어 후방차량의 2차 사고를 방지할 수 있는 차량 도로이탈 방지장치를 제공함에 그 목적이 있다.The present invention has been invented to solve the above problems, the vehicle road departure prevention device that can prevent the road departure of the vehicle, as well as to determine whether there is an accident of the front vehicle to prevent secondary accidents of the rear vehicle. The purpose is to provide.

상기와 같은 목적을 달성하기 위한 본 발명은, 지면에 설치되는 지지부재와 ; 지지부재에 회전가능하게 고정되는 회전축과, 회전축의 외주면에 고정되는 가이드를 갖춘 이탈방지용 회전체 ; 이탈방지용 회전체의 회전을 감지하는 회전감지기구 ; 차량에 사고를 알리는 디스플레이 및; 회전감지기구의 신호를 받아 디스플레이의 작동을 제어하는 제어부로 이루어져 있다. The present invention for achieving the above object, the support member is installed on the ground; A separation prevention rotation body having a rotating shaft rotatably fixed to the support member and a guide fixed to the outer circumferential surface of the rotating shaft; Rotation sensing mechanism for detecting the rotation of the rotation preventing body for departure; A display informing the vehicle of the accident; It is composed of a control unit for controlling the operation of the display in response to the signal of the rotation sensing mechanism.

더 바람직하게는, 상기 가이드는 회전축에 고정되는 림과, 림을 감싸면서 고정되는 완충부재로 구성된다.More preferably, the guide is composed of a rim fixed to the rotating shaft, and a buffer member fixed while surrounding the rim.

이하, 첨부도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail.

도 1은 본 발명에 따른 차량 도로이탈 방지장치의 단면도로서 도 1을 참조하면, 지면에 설치되는 지지부재(10)와 ; 지지부재(10)에 회전가능하게 고정되는 회전축(21)과, 회전축(21)의 외주면에 고정되는 가이드(22)를 갖춘 이탈방지용 회전체(20) ; 이탈방지용 회전체(20)의 회전을 감지하는 회전감지기구(30) ; 차량에 사고를 알리는 디스플레이(40) 및; 회전감지기구(30)의 신호를 받아 디스플레이(40)의 작동을 제어하는 제어부(50)로 이루어져 있다.1 is a cross-sectional view of the vehicle road departure prevention apparatus according to the present invention, referring to Figure 1, the support member 10 is installed on the ground; A detachment prevention rotating body (20) having a rotating shaft (21) rotatably fixed to the support member (10) and a guide (22) fixed to an outer circumferential surface of the rotating shaft (21); Rotation detecting mechanism 30 for detecting the rotation of the separation prevention rotating body 20; A display 40 informing the vehicle of the accident; Consists of a control unit 50 for controlling the operation of the display 40 in response to the signal of the rotation detecting mechanism (30).

상기 지지부재(10)는 중심부가 관통된 캡(12)과, 캡(12)과 이어지는 본체(11)으로 이루어져 있다.The support member 10 is composed of a cap 12 penetrated through the central portion thereof, and a main body 11 connected to the cap 12.

본체(11)는 중심부에 지지부(11a)가 형성되고, 하부에 체결부(11b)가 구비된다. The main body 11 has a support portion 11a formed at the center thereof, and a fastening portion 11b provided at the lower portion thereof.

상기 이탈방지용 회전체(20)는 회전축(21)과, 회전축(21)의 외주면에 고정되는 가이드(22)로 구성된다. The departure preventing rotary body 20 is composed of a rotary shaft 21, a guide 22 fixed to the outer peripheral surface of the rotary shaft 21.

상기 회전축(21)은 외주면에 키홈이 형성되고, 저면이 베어링(1)을 매개로 캡(12)에 안착되고, 측면이 베어링(2)를 매개로 지지부(11a)에 의해 지지된다The rotary shaft 21 is formed with a key groove on the outer circumferential surface, the bottom surface is seated on the cap 12 via the bearing (1), the side surface is supported by the support (11a) via the bearing (2)

상기 가이드(22)는 키를 매개로 회전축(21)에 고정되는 림(22a)과, 림(22a)에 고정되는 완충부재(22b)로 구성되며, 완충부재(22b)는 폐타이어로 하기로 한다.The guide 22 is composed of a rim 22a fixed to the rotary shaft 21 via a key, and a buffer member 22b fixed to the rim 22a. do.

한편, 상기 림(22a)의 간격을 유지하며, 충격시 림(22a)의 진동을 잡아주는 부싱부재(4)가 회전축(21)의 외주면에 장착되어 림(22a)의 저면에 위치한다.  Meanwhile, a bushing member 4 which maintains the gap of the rim 22a and catches vibration of the rim 22a during impact is mounted on the outer circumferential surface of the rotation shaft 21 and positioned on the bottom surface of the rim 22a.

상기 회전감지기구(30)는 통상적으로 쓰이는 센서로서, 지지부재(10)의 본체(11)의 내주면에 장착되어 회전축(21)의 회전유무 및 속도 등을 감지한다. The rotation detecting mechanism 30 is a sensor that is commonly used, and is mounted on the inner circumferential surface of the main body 11 of the support member 10 to detect the presence or absence of rotation and the speed of the rotating shaft 21.

상기 디스플레이(40)는 `전방사고발생` 등의 경고문구를 표시할 수 있는 통상의 LED장치, 경광등, 및 스피커 등으로, 후방차량이 인식하기 좋은 위치에 배치된다.The display 40 is a conventional LED device, a warning light, a speaker, or the like that can display warning phrases such as 'front accident occurrence', and is disposed at a position where a rear vehicle can be easily recognized.

상기 제어부(50)는 회전감지기구(30)으로부터 전송되는 회전축(21)의 회전 유무 및 속도 신호를 판별하여 디스플레이(40)를 제어해, 디스플레이(40)을 통해 경고문구를 출력한다. The controller 50 controls the display 40 by determining whether the rotating shaft 21 is transmitted from the rotation detecting mechanism 30 and a speed signal, and outputs a warning phrase through the display 40.

도 2는 본 발명에 따른 차량 도로이탈 방지장치의 작용상태를 도시한 것으로, 도 1 및 도 2를 참조하여 차량 도로이탈 방지장치의 결합상태 및 사용상태를 살펴보면 다음과 같다.2 is a view illustrating an operation state of the vehicle road departure prevention apparatus according to the present invention. Referring to FIGS. 1 and 2, the coupling state and the use state of the vehicle road departure prevention apparatus are as follows.

지면에 내장부(61)가 형성된 고정부재(60)가 타설양생된다. 고정부재(60)의 내장부(61)에 지지부재(10)의 캡(12)이 안착되고, 캡(12)의 상부면에 베어링(1)이 장착된다.The fixing member 60 in which the internal part 61 is formed on the ground is poured. The cap 12 of the support member 10 is seated on the built-in portion 61 of the fixing member 60, and the bearing 1 is mounted on the upper surface of the cap 12.

상기 베어링(1)의 상면에 회전축(21)의 돌부(T)가 안착되고, 지지부재(10)의 본체(11)의 내주면에 베어링(2)이 장착되며, 본체(11)의 체결부(11b)가 볼트(3)와 너트(N)을 매개로 고정부재(60)에 고정된다.The protrusion T of the rotating shaft 21 is seated on the upper surface of the bearing 1, the bearing 2 is mounted on the inner circumferential surface of the main body 11 of the support member 10, and the fastening portion of the main body 11 ( 11b) is fixed to the fixing member 60 via the bolt 3 and the nut N.

상기와 같은 상태에서, 부싱부재(4)를 회전축(21)에 끼워 넣어 지지부재(10)의 상면에 안착시키고, 연결부재(40)를 회전축(21)에 삽입시켜 부싱부재(4)의 상부에 위치시킨 후 회전축(21)과 가이드(22)의 림(22a)을 키를 매개로 결합시킨다.In the above state, the bushing member 4 is inserted into the rotary shaft 21 and seated on the upper surface of the support member 10, and the connecting member 40 is inserted into the rotary shaft 21 to insert the upper portion of the bushing member 4. After positioning in the rotary shaft 21 and the rim (22a) of the guide 22 is coupled via a key.

상기 가이드(22)의 림(22a)은 끝단이 꺽쇠 형상으로 되어 완충부재(22b)의 내주면이 림(22a)의 끝단에 꺾여 들어가 삽입고정된다.The end of the rim 22a of the guide 22 has a cramped shape, and the inner circumferential surface of the shock absorbing member 22b is bent and inserted into the end of the rim 22a.

상기 완충부재(22b)는 다수개가 구비되어 회전축(21)과 연동 될 수 있다.The buffer member 22b may be provided in plural numbers and interlocked with the rotation shaft 21.

상기 회전감지기구(30)는 지지부재(10)의 중심부에 형성된 홀 내주면과 회전축(21)의 외주면에 서로 대응되게 장착되어 회전축(21)이 회전할 시 회전유무 및 속도를 인식한다.The rotation detecting mechanism 30 is mounted to correspond to each other on the inner circumferential surface of the hole formed in the center of the support member 10 and the outer circumferential surface of the rotating shaft 21 to recognize whether the rotating shaft 21 rotates and the speed.

상기 회전감지기구(30)와 연결되도록 제어부(50)가 설치되며, 제어부(50)의 제어를 받는 디스플레이(40)가 후방차량이 인식하기 좋은 또 다른 차량 이탈방지용 회전체(20)에 설치된다.The control unit 50 is installed so as to be connected to the rotation detecting mechanism 30, and the display 40 under the control of the control unit 50 is installed on another vehicle departure preventing rotating body 20 which can be easily recognized by the rear vehicle. .

상기 차량 도로이탈 방지장치는 급격한 코너가 형성된 도로의 가에 배치된다. 도 2와 같이 급격한 코너부에 다수의 이탈방지용 회전체(20)가 설치되고, 코너의 진입부에 위치한 이탈방지용 회전체(20) 또는 코너에 위치한 모든 이탈방지용 회전체(20)에 회전감지기구(30)와 디스플레이(40)를 설치한다. The vehicle road departure prevention apparatus is disposed at a side of the road where a sharp corner is formed. 2, a plurality of departure prevention rotating bodies 20 are installed at the corners of a sharp corner, and the rotation detecting mechanism is installed on the departure preventing rotating body 20 located at the entrance of the corner or all the departure preventing rotating bodies 20 located at the corners. 30 and the display 40 are installed.

상기와 같은 상태에서 급격한 코너를 돌던 전방차량이 코너를 빠져나가다 중심을 잃고 도로를 이탈하면, 전방차량은 이탈방지용 회전체(20)의 완창부재(22b)에 부딪친다. 전방차량과 부딪친 완충부재(22b)가 충격을 흡수하며 회전을 하여 이탈 방지용 회전체(20)가 회전을 한다. When the vehicle ahead of the sharp corner in the above state exits the corner and loses its center and leaves the road, the front vehicle hits the armhole member 22b of the rotation preventing body 20 for separation. The shock absorbing member 22b that collides with the front vehicle absorbs the shock and rotates so that the separation preventing rotation body 20 rotates.

이때, 차량이 이탈방지용 회전체(20)에 충돌하게 되면, 이탈방지용 회전체(20)는 지지부재(10)의 지지부(11a)를 밀면서 넘어지려하는데, 지지부재(10)는 회전축(21)을 잡아주는 역할을 한다. 또한, 회전축(21)이 충격으로 인해 지지부재(10)를 이탈하는 것을 막기 위해 돌부(T)가 회전축(21)의 하부에 형성된다.At this time, when the vehicle collides with the departure prevention rotating body 20, the departure preventing rotating body 20 will fall while pushing the supporting part 11a of the supporting member 10, but the supporting member 10 is the rotating shaft 21. It serves to hold. In addition, the protrusion T is formed below the rotation shaft 21 to prevent the rotation shaft 21 from being separated from the support member 10 due to the impact.

상기 회전축(21)이 회전을 하면, 회전축(21)의 저면에 위치한 회전감지기구(30)가 회전축(21)의 회전을 감지하여 제어부(50)에 신호를 보낸다. 신호를 받은 제어부(50)는 코너의 진입부에 위치한 디스플레이(40)를 제어해 디스플레이(40)에 경고문구등이 표시되도록 한다.When the rotating shaft 21 rotates, the rotation detecting mechanism 30 located at the bottom of the rotating shaft 21 detects the rotation of the rotating shaft 21 and sends a signal to the controller 50. The controller 50 receiving the signal controls the display 40 located at the entrance of the corner so that a warning phrase may be displayed on the display 40.

한편, 전방 차량을 쫓아오던 후방차량은 급격한 코너로 인해 전방 차량이 사고가 난 것을 알지 못하게 되는데, 상기 디스플레이(40)의 경고문구에 의해 전방차량의 상황을 인식할 수 있어, 2차적인 충돌사고를 방지할 수 있다. On the other hand, the rear vehicle following the front vehicle does not know that the front vehicle has an accident due to a sharp corner, the situation of the front vehicle can be recognized by the warning phrase of the display 40, secondary collision accident Can be prevented.

본 발명은 상기한 바와 같은 실시예에 한정되지 않고 이하 청구범위를 벗어나지 않는 한도 내에서 보다 다양하게 변형실시될 수 있음은 물론이다.The present invention is not limited to the embodiment as described above, but may be modified in various ways within the scope of the claims below.

이상 상기한 바와 같은 본 발명에 따르면, 지면에 설치되는 지지부재(10)와 ; 지지부재(10)에 회전가능하게 고정되는 회전축(21)과, 회전축(21)의 외주면에 고정되는 가이드(22)를 갖춘 이탈방지용 회전체(20) ; 이탈방지용 회전체(20)의 회전을 감지하는 회전감지기구(30) ; 차량에 사고를 알리는 디스플레이(40) 및; 회전감지기구(30)의 신호를 받아 디스플레이(40)의 작동을 제어하는 제어부(50)로 이루어져, 차량의 도로이탈을 방지함은 물론, 전방 차량의 사고 유무를 확인할 수 있어 후방차량의 2차 사고를 방지할 수 있는 효과가 있다.According to the present invention as described above, the support member 10 is installed on the ground; A detachment prevention rotating body (20) having a rotating shaft (21) rotatably fixed to the support member (10) and a guide (22) fixed to an outer circumferential surface of the rotating shaft (21); Rotation detecting mechanism 30 for detecting the rotation of the separation prevention rotating body 20; A display 40 informing the vehicle of the accident; Consists of a control unit 50 for controlling the operation of the display 40 in response to the signal of the rotation detection mechanism 30, it is possible to prevent the deviation of the road of the vehicle, as well as to determine whether there is an accident of the front vehicle secondary of the rear vehicle It is effective to prevent accidents.

Claims (2)

지면에 설치되는 지지부재(10)와 ; 지지부재(10)에 회전가능하게 고정되는 회전축(21)과, 회전축(21)에 고정되는 림(22a)과 림(22a)을 감싸면서 고정되는 완충부재(22b)로 이루어지며 회전축(21)의 외주면에 고정되는 가이드(22)를 갖춘 이탈방지용 회전체(20) ; 이탈방지용 회전체(20)의 회전을 감지하는 회전감지기구(30) ; 차량에 사고를 알리는 디스플레이(40) 및; 회전감지기구(30)의 신호를 받아 디스플레이(40)의 작동을 제어하는 제어부(50)로 이루어진 것을 특징으로 하는 차량 도로이탈 방지장치.A support member 10 installed on the ground; The rotating shaft 21 is rotatably fixed to the support member 10, and the rim 22a and the buffer member 22b fixed while wrapping the rim 22a fixed to the rotating shaft 21 and the rotating shaft 21 Breakaway prevention rotating body having a guide 22 fixed to the outer peripheral surface of the 20; Rotation detecting mechanism 30 for detecting the rotation of the separation prevention rotating body 20; A display 40 informing the vehicle of the accident; Vehicle road departure prevention device, characterized in that consisting of a control unit 50 for controlling the operation of the display 40 in response to the signal of the rotation detection mechanism (30). 삭제delete
KR1020060121580A 2006-12-04 2006-12-04 Vehicle road departure prevention device KR100738589B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950019002U (en) * 1993-12-22 1995-07-24 허창희 Road escape barrier
JPH111913A (en) * 1997-06-12 1999-01-06 Okabe Co Ltd Protective fence and shock-absorbing method thereof
KR20030088288A (en) * 2002-05-14 2003-11-19 김종운 Treffic Safety measures
KR20060015000A (en) * 2004-08-13 2006-02-16 명성산업개발 주식회사 Guardrail equipped with communication device and guardrail monitoring system using the same
KR20060102194A (en) * 2005-03-23 2006-09-27 영 성 이 Road median accident prevention facility

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950019002U (en) * 1993-12-22 1995-07-24 허창희 Road escape barrier
JPH111913A (en) * 1997-06-12 1999-01-06 Okabe Co Ltd Protective fence and shock-absorbing method thereof
KR20030088288A (en) * 2002-05-14 2003-11-19 김종운 Treffic Safety measures
KR20060015000A (en) * 2004-08-13 2006-02-16 명성산업개발 주식회사 Guardrail equipped with communication device and guardrail monitoring system using the same
KR20060102194A (en) * 2005-03-23 2006-09-27 영 성 이 Road median accident prevention facility

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