WO2018110877A1

WO2018110877A1 - Plastic guardrail

Info

Publication number: WO2018110877A1
Application number: PCT/KR2017/013971
Authority: WO
Inventors: 유준령
Original assignee: (주)카리스가드레일; 유준령
Priority date: 2016-12-13
Filing date: 2017-12-01
Publication date: 2018-06-21
Also published as: KR101738549B1; CN108474186A; CN108474186B

Abstract

The present invention relates to a plastic guardrail made of a synthetic resin material and fixed to a vertical post in a transverse direction. The guardrail of the present invention comprises: an outer structure having a plurality of inward-oriented first ribs; an inner structure having fitting grooves formed between a plurality of outward-oriented second ribs such that the first ribs can be fitted and inserted therein; and an intermediate layer for connecting end portions of the first and second ribs to be cornerwise to each other such that the end portion of the first ribs is positioned at the entrance of the fitting grooves when the inner and outer structures face each other. In the structure, when an impact is applied to the outer structure, the intermediate layer is cut off and relieves impact while the first ribs are forcibly inserted into the fitting grooves.

Description

Plastic guard rail

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to protective guardrails erected on roadsides for vehicle traffic, and more particularly to plastic molded guardrails designed to effectively respond to external impacts.

In general, guardrails are road facilities installed along roadsides for the purpose of indicating road boundaries and preventing vehicle departure. 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. This demand is particularly concerned with the protection of drivers and occupants.

Traditionally, guardrails are metal plates that are press-formed in a continuously curved form and are continuously placed and fixed on rail posts properly disposed along the roadside. However, this metal guard rail is inconvenient to handle and dangerous, and thus has a problem of poor workability. The metal guard rail not only has a buffering ability to absorb shock but also has problems such as corrosion. Thus, recently, there have been proposals such as making the material plastic or adding a cushioning element thereto.

For example, Utility Model Registration Nos. 180108, 331636, and the like disclose a guardrail which is designed to mitigate an impact in a vehicle crash by attaching a polymer shock absorber to the 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 guardrail according to the prior art described above. It is an object of the present invention to provide a guardrail that can more effectively mitigate an impact through an active action for its absorption against an external impact. Another object of the present invention is to provide a guardrail configured so that fragmentation of the guardrail due to the impact does not occur as much as possible.

The guardrail of the present invention is based on a plastic guardrail formed from synthetic resin and fixed transversely to the vertical post.

Structurally:

An outer structure comprising a surface layer providing a contact surface against external impact and a plurality of first ribs protruding inwardly from the surface layer;

A backing layer providing a fixing surface for the post, a plurality of second ribs protruding outwardly from the backing layer, and a fitting groove formed to closely insert the first rib between the adjacent second ribs. Internal structure;

An intermediate layer that alternately connects the ends of the first and second ribs so that the ends of the first rib are located at the inlet of the fitting groove when the outer structure and the internal structure are disposed to face each other;

It is made, including.

When the impact is applied to the surface layer, the intermediate layer is broken and the first rib is forcibly inserted into the fitting groove, and the impact is alleviated by the frictional resistance continuously provided during the insertion process.

Preferably, the guardrail of the present invention is:

Shock-absorbing synthetic resin foam filled in the fitting groove;

It further comprises.

Preferably, the outer surface of the first rib and the inner wall of the fitting groove have corresponding friction protrusion-groove structures.

Further, preferably, a PC resin material of a thermoplastic engineering plastic resin is applied as the material of the outer structure 20, and a material selected from the engineering plastic resin and high-density polyethylene (HDPE) as the material of the inner structure 30. Plastic resin material obtained by mixing the mixture in a weight ratio of 30 to 50:70 to 50 is applied.

The foam is a conventional polyethylene foam.

According to the guardrail of the present invention, when an impact is applied to the surface layer of the outer structure, the intermediate layer is broken and the first rib is forcibly inserted into the fitting groove of the inner structure. In addition, the frictional resistance is continuously provided during the insertion process, and the internal and external structures are pressed together and are integrally combined. Therefore, the impact that is applied can be absolutely alleviated, and the likelihood that the guardrail fragments will occur after the impact is significantly reduced.

In a preferred embodiment, the foam elastically absorbs the impact corresponding to the front end of the first rib, and the friction protrusion-groove structure provides a stronger frictional resistance between the first rib and the fitting groove in succession. Therefore, there is an effect that can double the features that can mitigate the impact and reduce the occurrence of debris.

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

2 is a state diagram of use of the guardrail according to the present invention.

3 is an enlarged sectional view taken along line 'A' of FIG.

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

5 is an enlarged view of a portion 'B' of FIG. 2;

[Description of the code]

10. Guardrail

11. Fasteners 12. Bolts

13. Washer member 14. Fixing hole

15. Fixing bolt

20. External structure

21. Surface layer 22. First rib

23. Fitting groove 24. Friction protrusion

25.Air Hole

30. Internal structure

31.Back layer 32.Second rib

33. Fitting groove 34. Foam

35. Groove 36. Air hole

40. Middle layer

P. Post

D1, D2. Waveform interval

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

1 and 2, the guardrail 10 according to the present invention is a plate extending longitudinally in the transverse direction with a longitudinal-waveform waveform, at the end of another guardrail 10 of the same structure and shape Is connected. For the above connection, a fastening hole 11 penetrating the ends of the opposite side guard rails 10, bolts 12 penetrating the fastening holes 11, respectively, two bolts on the back of the guard rail 10 It includes a common washer member 13 to receive the (12) to connect both guard rails (10).

In the drawings,

reference numerals

14 and 15 are fixing holes and fixing bolts formed for installing the guard rail 10 according to the present invention on the roadside rail post P. The plate shape and connection structure of the guardrail 10 described above are not special in the present invention, and the present invention is not limited thereto. For example, a separate bracket structure may be used for connecting the guard rails 10 and fixing the posts P.

Referring to FIG. 3, the guard rail 10 of the present invention is based on a plastic guard rail formed of a synthetic resin and fixed in a transverse direction to a vertical post P, and is designed in multiple structures. Is an intermediate layer disposed between the front side outer structure 20 and the rear post P side inner structure 30 and the outer structure 20 and the inner structure 30 to connect both structures 20 and 30 ( 40).

The guardrail 10 shown as described above is formed in a waveform of an overall shape, but may be formed in a curved or planar shape.

The outer structure 20 includes a surface layer 21 that provides a contact surface to the outside and a plurality of first ribs 22 protruding inward from the surface layer 21. In addition, the internal structure 30 includes a rear layer 31 which provides a fixing surface for the post P, and a plurality of second ribs 32 protruding outward from the rear layer 31. Is done.

In addition, the internal structure 30 includes a fitting groove 33 formed to allow the first rib 22 to be tightly inserted between the second ribs 32 adjacent to each other. Although not necessarily required, the outer structure 20 may likewise have a fitting groove 23 formed so that the second ribs 32 may be tightly inserted between the first ribs 22 adjacent to each other. It is designed to include.

Since the outer diameter of the first rib 22 and the inner diameter of the fitting groove 33 are about the same level by the term 'close contact', the position and size of the first rib 22 are precisely determined. If not set, the insertion may be difficult or the first rib 22 or the second rib 32 may be broken. Therefore, in order to guide the proper insertion into the fitting groove 33, the first rib 22 is formed in a pointed shape or a round shape.

On the other hand, the first rib 22 and the second rib 32 is formed radially from the center of the waveform in the longitudinal-direction waveform section (D1, D2) of the guard rail (10). This form allows the impact transmission direction and the corresponding

shock absorbing means

22, 33, 34 to lie in a straight line 'C-C' against the impact at any point on the surface of the outer structure 20, It guides the proper insertion of the fitting groove 33 of the first rib 22 as well as functions to improve the directionality and efficiency of the buffer. For example, when an impact is applied to the peak portion of the waveform, the crest is gradually lowered, and accordingly, proper insertion into the fitting groove 33 of the first rib 22 may be naturally performed.

The intermediate layer 40 is a means for maintaining the overall integral shape of the guard rail 10, and the first rib 22 and the second rib (between the outer structure 20 and the inner structure 30 facing each other ( And connecting means for integrally forming both structures 20-30 by connecting the ends of the ends 32. In detail, the intermediate layer 40 may include a first portion such that an end portion of the first rib 22 is positioned at an inlet of the fitting groove 33 when the outer structure 20 and the inner structure 30 are disposed to face each other. End portions of the ribs 22 and the second ribs 32 are connected to each other by a shift.

In the figure, the intermediate layer 40 is shown as one layer in which the ends of the first ribs 22 and the second ribs 32 are in contact with the upper and lower surfaces, respectively. It can be understood as a line extending along the ends of the first ribs 22 and the second ribs 32 which are contact-connected between the edges of the ends. The intermediate layer 40 here forms one longitudinal-waveform line by successive 'V' or rounds corresponding to the end shape of each

rib

22, 32.

In the present invention, the guard rail 10 is formed of a thermoplastic resin material, preferably, the outer structure 20 and the intermediate layer 40 is applied with a high strength material to enhance the impact resistance In addition, the internal structure 30 is integrally formed by applying a material having a lower strength than the external structure 20 in consideration of internal buffering property and water solubility of the first rib 22.

PA, PC, POM (polyacetyl), PBT (polybutylene terephthalate), MPPO (modified polyphenylene), which are known to have a strength that is used as an internal and external component of an automobile as a material of the external structure 20 Oxide), PET, engineering plastic resin (EP.VC) may be applied. And as a material of the internal structure 30 may be applied to a general-purpose plastic resin selected from PE, PP, PVC, PS, ABS, AS (acrylonitrile styrene copolymer), MBS (methacryl resin).

However, even if the internal structure 30 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 external structure 20, 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.

3 and 4, when the external impact R on the guard rail 10 impacts the surface layer 21 of the external structure 20, the external structure 20 and the internal structure 30 are affected. The first layer 22 is forcibly inserted into the fitting groove 33 while the intermediate layer 40 for connecting the first layer 22 is broken, and the first rib 22 and the fitting groove 33 are continuously provided during the insertion process. The shock is alleviated by the frictional resistance between the shells.

In order to further relieve the impact, the guardrail of the present invention preferably further includes a shock absorbing synthetic resin foam 34 in the form of a foam filled in the fitting groove 33. Structurally, the foam 34 corresponds to the end of the first rib 22 in front to elastically absorb the impact. Preferably, the foam 34 is a conventional polyethylene molded foam.

Here, the filling foam 24 serves to elastically support the adjacent second ribs 32 on the left and right sides in addition to the front corresponding to the impact.

In addition, preferably, the first rib 22 includes a plurality of friction protrusions 24 formed on an outer surface thereof, and the fitting groove 33 is formed on an inner wall to correspond to the friction protrusions 24. 35). The friction protrusion-

groove

24,35 corresponding structure provides a stronger frictional resistance between the first rib 22 and the fitting groove 33 in succession and at the same time suppresses the force to be shot in the opposite direction, while the foam ( 34) is firmly disposed on the inner wall of the fitting groove (33).

In the above structure, the impact resistance of the guard rail 10 is ensured by the outer structure 20 of the material described above. And the cushioning properties of the guard rail 10 are ensured by the internal structure 30 of the material, the interaction between both

ribs

22 and 32, the foam 24 and the friction protrusion-

groove

24 and 35 corresponding structures. And reinforced.

Reference numerals

25 and 36 denote ordinary air holes for buffering which are formed in the longitudinal direction in the surface layer 21 of the outer structure 20 and the back layer 31 of the inner structure 30, respectively.

On the other hand, at the same time the relief operation according to the impact, while the first rib 22 is inserted into the fitting groove 33, the outer structure 20 and the inner structure 30 are 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.

Referring to FIG. 5, the guard rail 10 has a fixing hole 14 formed through the second rib 32 in the surface layer 21 of the outer structure 20. In fact, the guard rail 10 is fixed to an element such as a post (P) based on the internal structure 30, if the fixing bolt 15 or the like penetrates the hollow fitting groove 33, the guard rail The support base of 10 becomes weak. Therefore, preferably, the fixing hole 14 of the guard rail 10 passes through the second rib 32 of the internal structure 30.

Claims

In the plastic guard rail formed of a synthetic resin material and fixed in the transverse direction to the vertical post (P),

An outer structure (20) comprising a surface layer (21) providing a contact surface against external impact and a plurality of first ribs (22) protruding inwardly from the surface layer (21);

Between a back layer 31 providing a fixing surface for the post P, a plurality of second ribs 32 protruding outward from the back layer 31 and the second ribs 32 adjacent to each other; An internal structure 30 including a fitting groove 33 formed to be tightly inserted into the first rib 22;

When the outer structure 20 and the inner structure 30 are disposed to face each other, the first and second ribs 22 and 32 so that the ends of the first ribs 22 are positioned at the inlet of the fitting groove 33. Intermediate layer 40 to connect the ends of the offset) to each other;

Including;

When the impact is applied to the surface layer 21, the intermediate layer 40 is broken and the first rib 22 is forcibly inserted into the fitting groove 33 to mitigate the impact;

Plastic guard rail characterized in that.
The method of claim 1,

The guardrail, the plastic guardrail, characterized in that it further comprises a shock-absorbing synthetic resin foam (34) filled in the fitting groove (33).
The method of claim 1,

The outer structure 20, the plastic guard rail, characterized in that it comprises a fitting groove 23 formed so that the second rib 32 is tightly inserted between the first rib 22 adjacent to each other. .
The method of claim 1,

The first rib 22 is a plastic guard rail, characterized in that the end is formed in a pointed or round shape.
The method of claim 1,

Plastic guardrail, characterized in that the outer surface of the first rib (22) and the inner wall of the fitting groove (33) has a structure corresponding to the friction protrusion-groove (24, 35).
The method of claim 1,

And the first ribs (22) and the second ribs (32) are formed radially from the center of the waveforms in the longitudinal-waveform sections (D1, D2) of the guardrail (10).
The method of claim 1,

The intermediate layer 40 is one layer in which each end of the first rib 22 and the second rib 32 is in contact with the upper and lower surfaces, or a first contact-connected process between the corners of each end. Plastic guardrail, characterized in that the line extending along the ends of the rib (22) and the second rib (32).
The method according to claim 1 or 7,

Wherein said intermediate layer (40) forms one longitudinal-corrugated line by successive 'V' or rounds corresponding to the end shape of each rib (22,32).
The method of claim 1,

PC resin material of the thermoplastic engineering plastic resin is applied as the material of the external structure 20, PA, PC, POM (polyacetyl), PBT (polybutylene terephthalate), MPPO as a material of the internal structure 30 (Modified polyphenylene oxide), Plastic guardrail characterized in that the resin material obtained by mixing the 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 34 is a plastic guardrail, characterized in that the usual polyethylene foam.
The method of claim 1,

The guardrail (10) is a plastic guardrail, characterized in that it has a fixing hole (14) formed through the second rib (32) in the surface layer (21) of the outer structure (20).