KR101727284B1 - The articulated bollard having a strong force of the lower portion - Google Patents

The articulated bollard having a strong force of the lower portion Download PDF

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Publication number
KR101727284B1
KR101727284B1 KR1020150132140A KR20150132140A KR101727284B1 KR 101727284 B1 KR101727284 B1 KR 101727284B1 KR 1020150132140 A KR1020150132140 A KR 1020150132140A KR 20150132140 A KR20150132140 A KR 20150132140A KR 101727284 B1 KR101727284 B1 KR 101727284B1
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South Korea
Prior art keywords
strut
elastic layer
annular
protective layer
layer
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KR1020150132140A
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Korean (ko)
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KR20170036843A (en
Inventor
전상훈
Original Assignee
주식회사 로드폴
전상훈
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Priority to KR1020150132140A priority Critical patent/KR101727284B1/en
Publication of KR20170036843A publication Critical patent/KR20170036843A/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14467—Joining articles or parts of a single article
    • 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
    • E01F9/619—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 with reflectors; with means for keeping reflectors clean

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)

Abstract

[0001] The present invention relates to a multi-joint bollard having a strong holding force of a lower portion, and more particularly, to a multi-joint bollard having a lower strong holding force, It is possible to provide a strong supporting force to the lower portion of the strut so as to more easily prevent the strut from being broken due to the external impact, It is possible to more easily reinforce the weak joining portion of the lower portion of the elastic layer and the lower portion of the strut and the weak joining portions of the upper strut, the lower strut and the plurality of intermediate struts of the strut through the elastic layer, So that the elastic layer can be injected into the mold for foamable molding, The upper and lower lengths of the struts can be more easily adjusted and the strut, the elastic layer, and the protective layer can be more stably fixed to the ground, It is effective.

Description

[0001] The present invention relates to an articulated bollard,

According to the present invention, an external impact such as a vehicle collision applied to the strut through the elastic layer formed on the outer surface of the strut and the foam layer formed on the outer surface of the elastic layer can be more easily buffered, It is possible to provide a strong supporting force to the lower portion of the support so as to more easily prevent breakage due to the bending of the elastic layer and to prevent the damage of the lower portion of the support via the reinforcing portion formed at the lower portion of the elastic layer, It is possible to more easily reinforce the joining portion and the weak joining portions of the upper strut, the lower strut and the plurality of intermediate struts of the strut, as well as being able to be injected into the expandable formwork as the foaming liquid passes over the outer surface of the reinforcing portion The elastic layer can be easily manufactured together with the struts through insert injection molding at one time, Edinburgh, it relates to a joint bollard as well as the vertical length of the pillar can be easily controlled than with the holding, the elastic layer, and a strong force of the lower portion in the protective layer may be a fixed position to a more stable ground.

In general, it is a safeguard to protect people in a certain area, to prevent entry of vehicles which are installed at the entrance of a road, a boundary of a road, a park, a performance hall, a playground, etc.,

Such a bollard generally has a structure in which a stone column is buried in the ground and protruded upwardly or has a structure in which it is buried in the ground as a rod of metal and protrudes upward. A plurality of chains are installed and operated at intervals, and recently, a chain drawn out to the inside of a hollow tube-shaped bollard having a hollow portion therein is formed to be wound around a bobbin, and the chain is automatically returned It is possible to prevent the entry of a vehicle into a bollard installation place as well as the entry of a person by a chain drawn from the bobbin if necessary, and in particular, to have a chain structure that is automatically restored and wound, A bollard having an anti-entry chain is disclosed in Korean Patent Laid- 0-2013-0104136.

However, the bollard proposed in Korean Patent Laid-Open Publication No. 10-2013-0104136 (bollard having an anti-entry chain) can not cushion an external impact such as a vehicle collision and is bent by an external impact such as a vehicle collision There is a problem that it is broken.

Korean Patent Laid-Open Publication No. 10-2013-0104136

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an elastic layer formed on the outer surface of a strut and a protective layer formed on the outer surface of the elastic layer, It is possible to provide a strong supporting force at the lower portion of the strut so as to more easily prevent the strut from being broken due to the external impact due to its easy buffering, It is possible to more easily reinforce the weak joining portion of the lower portion of the elastic layer and the lower portion of the strut and the weak joining portion of the upper strut, the lower strut and the plurality of intermediate struts of the strut, The elastic layer can be injected into the foamable mold by passing through the insert, The upper and lower lengths of the strut can be more easily adjusted, and the lower strut, the elastic stratum, and the protective layer can be more stably fixed on the ground. It is an object of the present invention to provide a multi-joint bollard having a strong supporting force.

According to an aspect of the present invention, And a resilient layer formed on an outer surface of the strut. The polyolefin bollard according to claim 1,

A first protrusion protruding inwardly of the elastic layer is formed on the outer surface of the lower portion of the strut, and a first groove recessed inward of the strut is alternately formed in the vertical direction of the strut, And a second protrusion protruding in the first groove direction of the strut and inserted into the first groove are formed on the upper and lower surfaces of the elastic layer, Direction, as shown in Fig.

It is preferable that a reinforcement portion protruding in a lower outer direction of the elastic layer and reinforcing a lower portion of the elastic layer is formed on a lower outer surface of the elastic layer.

Further, it is preferable that the elastic layer is insert injection-molded together with the struts.

Furthermore, the strut may include an upper strut and a lower strut; And an intermediate strut disposed between the upper strut and the lower strut, wherein the elastic strands are formed on an outer surface of the upper strut and the lower strut respectively; And an intermediate elastic layer formed on an outer surface of the intermediate strut.

In addition, it is preferable that a protective layer for protecting the elastic layer and the strut is formed on an outer surface of the elastic layer.

In addition, it is preferable that the protective layer is formed by foam molding on the outer surface of the elastic layer.

The outer diameter of the protective layer may be gradually increased from the upper portion of the protective layer to the lower portion of the protective layer.

Here, the protective layer may be formed on the upper surface of the elastic layer, and may have an outer diameter gradually decreasing from the upper portion to the lower portion. And a lower protective layer formed on an outer surface of the elastic layer located in a lower direction of the upper protective layer and having an outer diameter gradually increasing from the upper portion to the lower portion.

In addition, it is preferable that the reflective layer is provided on the outer surface of the protective layer between the lower part of the upper protective layer and the upper part of the lower protective layer.

According to the present invention, an external impact such as a vehicle collision applied to the strut through the elastic layer formed on the outer surface of the strut and the foam layer formed on the outer surface of the elastic layer can be more easily buffered, The elastic layer can have a strong supporting force at the lower portion of the strut so that it can be more easily prevented from being broken by being bent by the elastic layer and the reinforcing portion protruding in the lower outer direction of the elastic layer from the lower portion of the elastic layer, And the weak joining portions of the strut and the upper strut, the lower strut, and the plurality of intermediate struts of the strut can be more easily reinforced, and the foamed liquid can be easily passed through the outer surface of the reinforcing portion, So that the elastic layer with the struts can be easily injected through insert injection molding The vertical length of the strut can be more easily adjusted according to the number of the plurality of intermediate struts, and the outer diameter of the stratum can be gradually increased from the upper portion of the protective layer to the lower portion, The elastic layer and the protective layer can be more stably fixed to the ground.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view schematically showing a multi-joint bollard having a strong holding force of a lower portion according to a first embodiment of the present invention,
Fig. 2 is an exploded sectional view of Fig. 1,
3 is a cross-sectional view schematically showing a state in which a reinforcing portion is formed under the elastic layer of the first embodiment,
4 is a cross-sectional view schematically showing a multi-joint bollard having a strong holding force of the lower part according to a second embodiment of the present invention,
Fig. 5 is an exploded sectional view of Fig. 4,
6 is a cross-sectional view schematically showing a multi-joint bollard having a strong holding force of the lower part according to a third embodiment of the present invention,
FIG. 7 is a cross-sectional view schematically showing a multi-joint bollard having a strong holding force of a lower portion according to a fourth embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. It is to be understood that the scope of the present invention is not limited to the following embodiments, and various modifications may be made by those skilled in the art without departing from the technical scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view schematically showing a multi-joint bollard having a strong holding force of a lower portion according to a first embodiment of the present invention, and FIG. 2 is a sectional view of FIG.

As shown in FIG. 1 and FIG. 2, the multi-joint bollard having a strong bottom supporting force according to the first embodiment of the present invention may include a strut 10 and an elastic layer 20.

First, the struts 10 may be made of various materials such as pipes made of metal such as steel.

The lower portion of the strut 10 may be embedded in the ground at a certain depth.

Next, the elastic layer 20 may be made of various materials such as a rubber material.

The elastic layer 20 is formed on the outer surface of the strut 10 while surrounding the outer surface of the strut 10.

The struts 10 and the elastic layer 20 may be formed by various methods. In order to more easily form the struts 10 and the elastic layer 20 at once, however, (10) and the elastic layer (20) may be insert injection molded.

2, an annular first protrusion 110 and an annular protrusion 110 are formed on a lower outer surface of the strut 10 in order to prevent the elastic layer 20 from being easily peeled and separated from the strut 10, An annular first groove 120 is formed alternately in the vertical direction of the strut 10 and an annular second groove 210 and an annular second protrusion 220 are formed on a lower inner surface of the elastic layer 20, May be formed alternately in the vertical direction of the elastic layer 20.

The annular first protrusion 110 of the strut 10 may protrude from the lower outer surface of the strut 10 to the inside of the lower portion of the elastic layer 20.

The annular first grooves 120 of the struts 10 may be recessed to a certain depth inward of the struts 10.

The annular second groove 210 of the elastic layer 20 may be recessed from the inner surface of the elastic layer 20 toward the outer surface of the elastic layer 20, An annular first protrusion 110 of the strut 10 may be inserted into the second groove 210.

The annular second protrusion 220 of the elastic layer 20 protrudes from the inner surface of the elastic layer 20 in the direction of the first groove 120 of the strut 10, Can be inserted into the first groove 120.

3 is a cross-sectional view schematically showing a state in which a reinforcing portion is formed under the elastic layer of the first embodiment.

3, in order to reinforce the lower portion of the elastic layer 20 and the lower portion of the strut 10, which are weak bonding portions of the elastic layer 20 and the strut 10, An annular reinforcing portion 30 which can be made of the same material as the elastic layer 20 protruding in the lower outer side of the elastic layer 20 and reinforcing the lower portion of the elastic layer 20 on the lower outer surface of the elastic layer 20 May be formed.

The upper outer diameter of the annular reinforcing portion 30 with respect to the central portion of the annular reinforcing portion 30 gradually increases from the upper portion of the annular reinforcing portion 30 toward the central portion of the annular reinforcing portion 30 Can be large,

The lower outer diameter of the annular reinforcing portion 30 with respect to the central portion of the annular reinforcing portion 30 is smaller in the lower portion of the annular reinforcing portion 30 from the central portion of the annular reinforcing portion 30 It can be gradually smaller.

FIG. 4 is a cross-sectional view schematically showing a multi-joint bollard having a strong holding force of a lower portion according to a second embodiment of the present invention, and FIG. 5 is a sectional view of FIG.

Next, a bollard according to a second embodiment of the present invention includes the struts 10 and the elastic layer 20 as in the first embodiment. As shown in FIGS. 4 and 5, The elastic layer 20 includes an upper elastic layer 201, a lower elastic layer 202 and a middle elastic layer 202. The upper elastic layer 201, the lower elastic layer 202, Layer 203 as shown in FIG.

The intermediate strut 103 may be provided between the upper strut 101 and the lower strut one or more than one.

The vertical length of the struts 10 can be adjusted according to the number of the intermediate struts 103.

An annular first protrusion 110 and an annular first groove 120 are formed on a lower outer surface of the upper strut 101, a lower outer surface of the lower strut 102 and a lower outer surface of the plurality of intermediate struts 103, Can be formed alternately in the vertical direction of the support pillars 10.

The upper elastic layer 201 and the lower elastic layer 202 may be formed on the outer surface of the upper strut 101 and the lower strut 102, respectively.

The intermediate elastic layer 203 may be formed on the outer surface of one or more of the intermediate struts 103, respectively.

An annular second groove 210 and an annular second projection 210 are formed on the lower inner surface of the upper elastic layer 201, the lower inner surface of the lower elastic layer 202 and the lower inner surface of the plurality of intermediate elastic layers 203, (220) may be alternately formed in the vertical direction of the elastic layer (20).

The upper elastic layer 201 and the lower elastic layer 202 constituting the elastic layer 20 together with the struts 10 in which the upper strut 101, the lower strut 102 and the middle strut 103 are connected to each other, The elastic layer 202 and the intermediate elastic layer 203 may be formed integrally with each other by insert injection molding at one time.

Alternatively, the upper strut 101 and the upper elastic layer 201, the lower strut 102, the lower elastic layer 202, the intermediate strut 103, and the intermediate elastic layer 203 may be separated from each other The upper strut 101, the lower strut 102, and the intermediate strut 103 may be detachably connected to each other after being molded by injection molding at one time.

When the intermediate strut 103 is one, the lower outer surface of the upper strut 101 may be detachably screwed to the inner surface of the upper portion of the intermediate strut 103.

The lower outer surface of one of the intermediate struts 103 can be detachably screwed to the upper inner surface of the lower strut 102. [

When the intermediate struts 103 are formed in a plurality of pieces, the lower outer surface of the upper strut 101 is detachably attached to the upper inner surface of one of the middle struts 103 positioned in the lower direction of the upper strut 101 Can be screwed together.

The lower outer surface of one of the intermediate struts 103 may be detachably screwed to the upper inner surface of the other intermediate strut 103. [

The lower outer surface of the other intermediate support 103 can be detachably screwed to the upper inner surface of the lower support 102.

A connecting portion between one of the intermediate struts 103 and one intermediate strut 103 and a connecting portion between one of the intermediate struts 103 and another intermediate strut 103, In order to reinforce the joining portion of the lower strut 102 due to its weakness,

A connecting portion between one of the intermediate struts 103 and one intermediate strut 103 and a connecting portion between one of the intermediate struts 103 and another intermediate strut 103, The annular reinforcing portion 30 may be formed for each outer surface of the elastic layer 20 around the joining portion of the lower strut 102. [

The lower elastic layer 202 and the lower elastic layer 202 may be joined to each other to reinforce the lower portion of the lower elastic layer 202 and the lower portion of the lower strut 102, The annular reinforcing portion 30 may be formed on the lower outer surface of the lower portion.

Next, the elastic layer 20 and the struts 10 are formed on the outer surface of the elastic layer 20 of the first and second embodiments while the outer surface of the elastic layer 20 of the first and second embodiments is wrapped. A protective layer 40 made of a synthetic resin such as urethane which protects the protective layer 40 can be foam-molded.

The foamed material for molding the protective layer 40 is injected and solidified in the state where the pillars 10 and the elastic layer 20 accommodated in the foam injection mold are insert injection molded and the elastic layer 20 is solidified, The protective layer 40 can be foam-molded on the outer surface of the layer 20, and in particular, the foamed liquid can be easily injected into the foamable mold while passing over the outer surface of the annular reinforcing portion 30. [ The protective layer 40 can be more easily foam-molded on the outer surface of the elastic layer 20.

6 is a cross-sectional view schematically showing a multi-joint bollard having a strong holding force of the lower part according to a third embodiment of the present invention.

Next, a bollard according to a third embodiment of the present invention includes the struts 10 and the elastic layer 20, as in the first and second embodiments, and the struts 10, the elastic layer 20 6, the outer diameter of the protective layer 40 is larger than the outer diameter of the protective layer 40 in the upper portion of the protective layer 40, It is preferable to increase gradually toward the lower direction of the base 40.

FIG. 7 is a cross-sectional view schematically showing a multi-joint bollard having a strong holding force of a lower portion according to a fourth embodiment of the present invention.

Next, a bollard according to a fourth embodiment of the present invention includes the struts 10 and the elastic layer 20 as in the first, second, and third embodiments, The upper protective layer 410 and the lower protective layer 420 may be formed.

The upper protective layer 410 may be formed on the upper surface of the elastic layer 20 and the outer protective layer 410 may have an outer diameter larger than the upper protective layer 410 The outer diameter can be gradually reduced to the lower portion of the outer diameter.

The lower protective layer 420 may be formed on the outer surface of the elastic layer 20 located below the upper protective layer 410 and the outer diameter of the lower protective layer 420 may be, The lower protective layer 420 may be larger than the upper protective layer 420.

In order to enable the pedestrian or the driver of the vehicle to recognize the protective layer 40 more easily with the naked eye, the lower protective layer 410 and the lower protective layer 420 are formed in the third embodiment, A reflective sheet 50 such as an annular shape may be provided on the outer surface of the protective layer 40 between the upper portion of the protective layer 40.

It is needless to say that the reflective sheet 50 may be provided in an annular shape on the upper surface portion of the protective layer 40 of the first and second embodiments.

The elastic layer 20 formed on the outer surface of the strut 10 and the protective layer 40 formed on the outer surface of the elastic layer 20 form the struts 10, it is possible to more easily buffer external impacts such as a vehicle collision and the like, so that the struts 10 can be more easily prevented from being broken by bending due to an external impact, The weak linkage between the elastic layer 20 and the strut 10 and the upper strut 10 of the strut 10 through the reinforcing portion 30 protruding from the lower portion of the elastic layer 20 at the lower portion 101, the lower strut 102 and the plurality of intermediate struts 103 can be more easily reinforced, and at the same time, the foamed liquid can be injected into the foamable mold while passing over the outer surface of the reinforcing portion 30. [ And furthermore, with the support 10, The length of the struts 10 can be easily adjusted according to the number of the plurality of intermediate struts 103. In addition, the elastic strands 20 can be easily manufactured through insert injection molding, The elastic layer 20 and the protective layer 40 are more stable because the outer diameter of the protective layer 40 gradually increases from the upper portion of the protective layer 40 to the lower portion. There is an advantage that it can be fixed to the ground.

10; Holding, 20; Elastic layer,
30; Reinforcing portion, 40; Protective layer

Claims (10)

An annular first protrusion and an annular first groove alternately formed in the upper and lower directions on the lower outer surface of the support, the upper support and the lower support being provided between the upper support and the lower support;
An upper elastic layer and a lower elastic layer respectively formed on outer surfaces of the upper strut and the lower strut, and an intermediate elastic layer formed on an outer surface of the middle strut, wherein inserts are injection-molded together with the strut, An elastic layer having an annular second groove into which the annular first protrusion of the strut is inserted and an annular second protrusion inserted into the annular first groove of the strut alternately up and down;
A protrusion formed in an outward direction and a protrusion in an outer direction on the lower outer surface of the lower elastic layer for each outer surface of the elastic layer around the joining portion of the upper strut and the middle strut and the joining portion of the middle strut and the lower strut, The lower elastic layer and the lower edge of the lower edge are reinforced, and the outer diameter gradually increases from the upper portion to the central portion, and the outer diameter gradually increases from the central portion to the lower portion An annular reinforcement portion whose outer diameter gradually decreases in size;
An upper protective layer formed on an upper surface of the elastic layer and having an outer diameter gradually reduced from the upper portion to the lower portion in order to foam the outer surface of the elastic layer to protect the elastic layer and the strut, And a lower protective layer formed on an outer surface of the elastic layer located in a lower direction of the elastic layer and increasing in size from an upper portion to a lower portion;
And a reflective paper provided on an outer surface of the protective layer between a lower portion of the upper protective layer and an upper portion of the lower protective layer. delete delete delete delete delete delete delete delete delete
KR1020150132140A 2015-09-18 2015-09-18 The articulated bollard having a strong force of the lower portion KR101727284B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200361164Y1 (en) * 2004-06-17 2004-09-07 미래피앤씨(주) Bollard have a conclusion construction
JP2005336806A (en) * 2004-05-26 2005-12-08 Sekisui Jushi Co Ltd Delineator
KR100802601B1 (en) * 2007-08-22 2008-02-18 (주)디엔테크 A bollard indicate traffic signal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130104136A (en) 2012-03-13 2013-09-25 이홍균 Bollard with chain for prevention of car entry

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005336806A (en) * 2004-05-26 2005-12-08 Sekisui Jushi Co Ltd Delineator
KR200361164Y1 (en) * 2004-06-17 2004-09-07 미래피앤씨(주) Bollard have a conclusion construction
KR100802601B1 (en) * 2007-08-22 2008-02-18 (주)디엔테크 A bollard indicate traffic signal

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