WO2018199420A1

WO2018199420A1 - Open type plastic guardrail

Info

Publication number: WO2018199420A1
Application number: PCT/KR2017/013973
Authority: WO
Inventors: 유준령
Original assignee: (주)카리스가드레일; 유준령
Priority date: 2017-04-28
Filing date: 2017-12-01
Publication date: 2018-11-01
Also published as: KR101799862B1

Abstract

The present invention relates to an open type plastic guardrail made of a synthetic resin material, and fixed to vertical posts in a transverse direction with a gap in a vertical direction so as to ensure vision of a driver to open. The guardrail is formed to be integrally extruded while comprising: a planar supporting part for providing a fixing surface for the post; and a protruding part having one or more semicircular protrusions formed toward the front of the supporting part, wherein the supporting part has a fitting groove formed therein, and the protrusion has a rib, which can be closely inserted into the fitting groove and formed at the position corresponding to the inner fitting groove, such that when an impact is applied to the protrusion, the impact is relieved by a continuous friction resistance while the rib is forcibly inserted into the fitting groove.

Description

Open plastic guard rail

The present invention is mainly installed in bridges and bridge railings for automobile roads, and more particularly, to a plastic molded guardrail designed to effectively cope with external impacts.

In general, the guardrail is a road facility installed along the road to indicate that the road is the boundary of the road and to prevent the departure of the vehicle. Such a guard rail needs to have a high impact strength to prevent the vehicle from falling off when the vehicle collides, while simultaneously requiring a property that can absorb the shock applied to the vehicle and the guard rail. Naturally, this need is in view of the protection of the driver and the occupant.

Guard rails for this purpose are generally divided into open guard rails and standard guard rails. The open guard rails are particularly narrow and are spaced at considerable intervals on the posts to ensure that the driver's vision is not tight. It means to make one. Although this type of guardrail is widely used for bridges and bridge railings due to its characteristics, it has recently been used regardless of a roadside or a central separator. However, due to its morphological characteristics, a special buffering capacity is required.

Referring to FIG. 1, a traditionally open guardrail is a metal plate that is press-formed in a continuously curved form, and is continuously disposed and fixed to a rail post properly disposed along a road. However, this metal guard rail is inconvenient to handle and dangerous, and thus has a problem of poor workability, not only a lack of shock absorbing ability to absorb shock, but also a problem of corrosion and the like.

Although not having the purpose of the above-mentioned open type, there has recently been a proposal to manufacture the guardrail by making the material from plastic or adding a cushioning element thereto. For example, Utility Model Registration Nos. 180108, 331636, and the like disclose a guard rail designed to mitigate an impact in a vehicle crash by attaching a polymer shock absorber to a surface of a metal plate. However, in this case, since the production and attachment of the guardrail takes a considerable cost and time, there is a problem that the productivity is significantly reduced.

In addition, Utility Model Registration No. 308889 discloses a guardrail molded only as a synthetic resin or FRP, and there are various proposals in which a fastening structure or a reflective structure is added to a guardrail having a similar material. There is no problem with regard to the strength, stiffness or cushioning of the. It is proposed to form an air layer inside the guardrail.

Registered Patent Nos. 466411, 897583, 1313133, and Published Patent Nos. 2010-109080 use synthetic resins or resins, but form an air layer therein, and each layer is approximately one-shaped, V-shaped, or W. Plastic guardrails are disclosed that are constructed by connecting linear ribs or honeycomb ribs. This structure will have a cushioning effect compared to the simple plate guardrails described above.

However, there are two important problems here.

First, the guardrail inner structure including the air layer and the ribs is limited in shape and does not actively act on external impact. Thus, when an external shock is applied to the guardrail, each layer is easily destroyed in turn, and in the process, the internal structure and shape have no active action for cushioning and mitigation. Thus, although the air layer and ribs provide the cushioning properties of the guardrail, the effect is only marginal.

Second, as explained above, when an external impact is applied to the guardrail of this structure, each layer is easily broken in turn, in which plastic debris of the broken guardrail is scattered and scattered in all directions, resulting in the second and the second 3 additional damage is likely to occur. Thus, in reality, structural improvements are urgently needed to prevent shocked guardrails from generating possible debris, but no countermeasures have been taken.

The present invention has been proposed to solve the problems of the open guardrail and the plastic guardrail according to the prior art described above. SUMMARY OF THE INVENTION An object of the present invention is to provide an open plastic guard rail capable of expressing sufficient cushioning function even when manufactured in a relatively narrow form as the open type, by more effectively alleviating the impact through an active action for absorbing the external impact. I would like to. Another object of the present invention is to provide an open plastic guardrail in which fragmentation of the guardrail due to the impact is not possible.

The present invention is based on a so-called 'open' plastic guardrail which is formed of synthetic resin and fixed transversely to the vertical posts at vertical and horizontal intervals to open the driver's field of view.

Structurally:

A ridge comprising a planar support providing a fixed surface for the post and at least one semi-circular protrusion formed integrally on the front surface of the support and providing a contact surface against external impact and formed forward;

A fitting groove is formed in the support;

An inwardly projecting rib is formed in the protrusion to be closely inserted into the fitting groove at a position corresponding to the fitting groove;

When the impact is applied to the protrusion, the impact is mitigated by the friction resistance continuously provided while the rib is forced into the fitting groove;

It is characterized by.

Preferably, the end edge of the rib is connected to the inlet edge portion of the fitting groove, and the connected portion is configured to be forcibly inserted into the fitting groove while being broken by the impact.

As a means for reinforcing the impact mitigation function, preferably, the guard rail further includes a shock absorbing synthetic resin foam filled in the fitting groove. In addition, the inner wall of the fitting groove and the outer surface of the rib have a friction protrusion-groove structure corresponding to each other.

In addition, preferably, a PC resin material of thermoplastic engineering plastic resin is applied as the material of the support part, and the material selected from the engineering plastic resin and HDPE (High-Density Polyethylene) is 30 to 50:70 to 50 as the material of the ridge. The plastic resin material obtained by mixing in the weight ratio of is applied.

The foam is a conventional polyethylene foam.

According to the guardrail of the present invention, when the impact is applied to the protrusion side of the ridge, the rib is forcibly inserted into the fitting groove of the support. In addition, frictional resistance is continuously provided during the insertion process, and the support part and the ridge part are pressed together and are integrally combined.

Therefore, even if the impact is large, it can be absolutely mitigated, and there is an effect that can significantly reduce the possibility of occurrence of guardrail fragments after the impact. In a preferred embodiment, the foam corresponds elastically to the rib end in front and resiliently absorbs the impact, and the friction protrusion-groove structure provides a stronger frictional resistance in succession between the rib and the fitting groove. Therefore, there is an effect that can double the features that can mitigate the impact and reduce the occurrence of debris.

On the other hand, when the applied shock is weak, the guardrail of the present invention is elastically cushioned by buffer means arranged in a line, that is, rib / fitting groove corresponding structure-connecting part-foam-friction protrusion / groove corresponding structure, and so on. It can be restored to, and at this time there is an effect that can greatly help to move the car off the road for a while in the normal driving direction again.

1 is a perspective view of a conventional open guard rail.

2 is a perspective view of the open guardrail according to the present invention.

3 is an enlarged cross-sectional view of FIG.

4 is a cross-sectional view for explaining the operation of the guardrail according to the present invention.

[Description of the code]

10. Guardrail

11. Fasteners 12. Bolts

20. Support

21. Fitting groove 22. Groove

30. Uplift

31.Rib 32.Rib

33. Connections 34. Friction protrusions

35.Air Hole

40. Foam

P. Post

Features and effects of the present invention 'open plastic guard rail' (hereinafter 'guard rail') described or not described above will become more apparent through the following description of the embodiments described with reference to the accompanying drawings. In the drawings below, the guardrail according to the invention is denoted by reference numeral 10.

2 and 3, the guard rail 10 according to the present invention is formed long in the cross-direction of the synthetic resin material is fixed to the vertical post (P) at intervals up and down, the driver's field of view is open So-called 'open' plastic guardrails. In general, the guardrail of this type has a narrow upper and lower width (W) than the standard guardrail, depending on the height of the post, but usually has a width of 20-35cm, the guardrail 10 of the present invention Also properly designed within this range.

In the drawings,

reference numerals

11 and 12 are fastening holes and bolts formed to install the guardrail 10 on the roadside rail post P, and a separate bracket structure is provided for fixing the rigid post P of the guardrail 10. It can also be used.

The guard rail 10 is structurally formed by integrally extruding the support 20 and the ridge 30. The support portion 20 is a portion that provides a fixed surface for the post (P), the ridge portion 30 is formed on the front of the support portion 20 to provide a contact surface against external impact formed toward the front One or more semi-circular protrusions 31. More specifically, the fitting groove 21 is formed inside the support part 20, and the protrusion 31 may be inserted in close contact with the fitting groove 21 at a position corresponding to the fitting groove 21. Inwardly projecting ribs 32 are formed.

And by this structure, when an external impact is applied to the protrusions 31 by the vehicle collision, the impact is alleviated by the friction resistance continuously provided while the rib 32 is inserted into the fitting groove 21 forcibly will be.

It can be seen that the thickness of the rib 32 and the width of the fitting groove 21 are almost the same level by the term 'close', so that the position and size of the rib 32 are not precisely set. Insertion may be difficult or the ribs 32 may become broken and may break. Therefore, in order to guide the proper insertion into the fitting groove 21, the rib 32 is formed in a pointed shape or a round shape of the end.

In the same sense, the end edge of the rib 32 is connected to the inlet edge portion of the fitting groove 21 can be more accurately inserted into the fitting groove 21 of the rib 32. Of course, this connecting portion 33 should be able to be broken by external pressure.

In the present invention, the guard rail 10 is formed of a thermoplastic resin material, preferably, the ridge 30 is a high strength material to enhance the impact resistance, and the support portion ( 20 applies a material having a lower strength than at least the ridge 30 in consideration of internal buffering properties and water solubility of the ribs 32, in which case the guard rail 10 may be molded by a double extrusion method.

Specifically, PA, PC, POM (polyacetyl), PBT (polybutylene terephthalate), MPPO (modified) known to have a strength that is used as a material for the ridge portion 30 as the interior and exterior parts of automobiles Polyphenylene oxide), an engineering plastic resin (EP.VC) selected from PET may be applied, and PE, PP, PVC, PS, ABS, and AS (acrylonitrile styrene copolymer) as the material of the support part 20. General purpose plastic resin selected from MBS (methacrylic resin) may be applied.

However, even if the support portion 20 is used as the guard rail 10 is applied to a significant impact as a whole, the level of strength close to the engineering resin is required. Therefore, as a preferred example, a PC (Polycarbonate) resin having the highest impact strength is used among the thermoplastic resin and the engineering resin as the material of the ridge portion 30, and the above-described E-P.V.C. The resin material obtained by mixing the material selected from the resin and HDPE (High-Density Polyethylene) is applied.

At this time, E-P.V.C. The resin is not to exceed the weight of the HDPE resin, preferably obtained by mixing in a weight ratio of 30 to 50:70 to 50.

Referring to Figure 4, the guard rail 10 of the present invention is installed in the post (P) by a fixing bolt 12 penetrating the fastening hole 11 properly formed, as shown in the fastening hole ( 11 is formed by sequentially passing through the inner support portion 20 and the portion in which the protrusions 31 are not formed.

When an external impact R is applied to the surface of the raised part 20 side protrusion 31 with respect to the guard rail 10 installed as described above, the support groove 20 side fitting groove 21 and the protrusion 31 The rib 32 is forcibly inserted into the fitting groove 33 while the connecting portion 33 connecting the opposite ends of the side ribs 32 is cut and fitted with the rib 32 continuously provided in the insertion process. The impact is alleviated by the frictional resistance between the grooves 21.

In order to further reinforce the shock-absorbing function, preferably, the guard rail 10 of the present invention further includes a shock-absorbing synthetic resin foam 40 in the form of a foam filled in the fitting groove 21. . Structurally, the foam 22 corresponds to the end of the rib 32 in front to elastically absorb the impact. Preferably, the foam 22 is a conventional polyethylene molded foam.

In addition, preferably, the rib 32 includes a plurality of friction protrusions 34 formed on an outer surface thereof, and the fitting groove 21 is formed on an inner wall of the groove 22 corresponding to the friction protrusion 34. Include. The friction protrusion-34 grooves 22 structure provides stronger frictional resistance between the ribs 32 and the fitting grooves 21 in succession and simultaneously suppresses the force to be shot in the opposite direction, while the foam 40 To be firmly arranged on the inner wall of the fitting groove (21).

In the above structure, the impact resistance of the guard rail 10 is ensured by the ridge 30 of the material, while the cushioning characteristics of the guard rail 10 are the support 30 of the material, rib-fitting grooves. It is ensured and reinforced by the interaction between (22-32), the foam 24, the friction protrusion-

groove

34, 22 corresponding structure. Reference numeral 35 denotes a normal buffer air hole formed in the longitudinal direction in the cross section of the ridge 30.

On the other hand, at the same time the relief operation according to the impact, while the rib 32 is inserted into the fitting groove 21, the outer ridge 30 and the inner support portion 20 is compressed to each other firmly coupled. Therefore, even if the guard rail 10 is damaged due to the impact, the degree of fragmentation and scattering is considerably smaller than that of the case where it is destroyed and scattered, so that the second and third damages caused by the damage It can be prevented.

On the other hand, when the impact applied to the guard rail is weak, the guard rail 10 of the present invention has a shock absorbing structure in which the impact is arranged in a line, that is, the rib /

fitting grooves

32 and 21 corresponding structure-the connecting portion 33- Foam 40-After the elastically buffered by the friction projection / groove (34, 22) corresponding structure can be restored to its original form, in which case the car that has temporarily left the driving road due to inadvertent driving, etc. It can be a great help to get you going.

Claims

In the open guard rail formed of a material and fixed in the transverse direction at intervals up and down on the vertical post, the driver's field of view is open,

Flat support 20 for providing a fixed surface for the post (P) and one or more semi-circular protrusions 31 formed integrally on the front of the support 20 to provide a contact surface for external impact and formed forward It includes a ridge 30 including;

Fitting grooves 21 are formed in the support part 20;

An inwardly projecting rib 32 is formed in the protrusion part 31, which can be tightly inserted into the fitting groove 21 at a position corresponding to the fitting groove 21;

When an impact is applied to the protrusions 31, the impacts are alleviated by the frictional resistance continuously provided while the ribs 32 are inserted into the fitting grooves 21 continuously;

An end edge of the rib 32 is connected to the inlet edge portion of the fitting groove 21, and the connecting portion 33 is broken by the impact and the rib 32 is forcedly inserted into the fitting groove 21. Configured to be;

An open plastic guard rail, characterized in that.
The method of claim 1,

The guardrail is an open plastic guardrail, characterized in that it further comprises a shock-absorbing synthetic resin foam (40) filled in the fitting groove (21).
The method of claim 1,

The rib 32 is an open plastic guard rail, characterized in that the end is formed in a pointed or round shape.
The method of claim 1,

The inner wall of the fitting groove (21) and the outer surface of the rib (32) is an open plastic guard rail, characterized in that it has a friction projection-groove (34, 22) structure corresponding to each other.
The method of claim 1,

PC resin material of the thermoplastic engineering plastic resin is applied as the material of the ridge 30, PA, PC, POM (polyacetyl), PBT (polybutylene terephthalate), MPPO ( Modified polyphenylene oxide), an open plastic guard rail characterized in that a resin material obtained by mixing an engineering plastic selected from PET and high-density polyethylene (HDPE) in a weight ratio of 30 to 50:70 to 50 is applied.
The method of claim 2,

The foam 40 is an open plastic guardrail, characterized in that the usual polyethylene foam.
The method of claim 1,

The guard rail 10 is bolted to the post P by using the fastening hole 11 formed through the portion of the ridge 30 in which the protrusion 31 is not formed and the support 20. 12) An open plastic guard rail characterized in that it is fixed with.