WO2018203598A1 - Rod-shaped plastic guardrail - Google Patents

Abstract

The present invention relates to a rod-shaped plastic guardrail which would normally be installed on the roadsides of high-level roads, bridges, etc. The guardrail is installed transversely on a vertical post, and comprises two cylinders arranged coaxially. In particular, the guardrail comprises: an outer cylinder including a plurality of first ribs protruding inward from the inner surface thereof; an inner cylinder having a plurality of second ribs protruding outward from the outer surface thereof and fitting grooves formed so as to allow the first ribs to be closely inserted between adjacent second ribs; an intermediate layer for connecting the ends of the first and second ribs to each other in a misaligned manner such that the ends of the first ribs are positioned at the entrances of the fitting grooves when the inner and outer cylinders are positioned to face each other; and a fixing means for installing the outer cylinder on one side surface of a post. According to the aforementioned structure, when impact is applied to the surface of the outer cylinder, the intermediate layer fails, and the first ribs are forcibly inserted into the fitting grooves, such that the impact is mitigated by frictional resistance that is continuously provided throughout the process.

Description

Sealed Plastic Guard Rails

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to plastic guardrails, and more particularly, to rod-shaped plastic guardrails that are installed at edges such as elevated or bridges to alleviate the impact caused by collision of automobiles while driving.

In general, guardrails for mitigating the impact of a car collision and guiding the driving direction are installed at edges, centerlines, and other necessary positions of a vehicle in which a vehicle travels. In particular, rod-shaped guardrails are mainly installed at elevated prices or bridges. On the other hand, although this guardrail is traditionally manufactured using a metallic material, many plastic guardrails have recently been proposed.

1 exemplarily shows an installation structure of a conventional rod-shaped plastic guard rail. As the base for the installation of the guard rail 1, a concrete base 2 and a plurality of posts 3 arranged in a row on the base 2 are provided. Here, one or more guard rails 1 are horizontally disposed at an upper and lower intervals, and the guard rails 1 are hollow rod-shaped incisions 4 for fixing bolts on one side thereof. Since this is formed, the guard rail 1 is fixed to the post 3 using the cut line 4 and the bolt B.

As described above, since the guard rail 1 has a hollow rod shape, the guard rail 1 functions as a protective film and does not implement a function to mitigate an impact during an actual collision. Proposed for this problem is a bridge bridge reinforced with reinforced plastics disclosed in Japanese Patent Laid-Open No. 10-2015-0020641. Referring to FIG. 2, the guard rail 5 disclosed herein is formed by combining each inner cylinder 6a and the outer cylinder 6b with a continuous 'V' rib 7 and a connecting rod 8, that is, the inner and outer cylinders. It is possible to provide a buffer function by leaving a large number of spaces between (6a, 6b).

In short, this structure is intended to reduce the impact while being lightweight by forming a multi-layered space or a space similar to a honeycomb inside. However, the guardrail of this structure is formed by forming only a large number of spaces therein, which may be advantageous in terms of light weight, but the function is not effective in terms of alleviating shocks such as automobiles. On the contrary, it can not be sustained even by a small impact and is easily broken. At this time, small plastic fragments are scattered and may cause a secondary accident.

This problem can actually cause a great loss of life, which can be attributed to the fact that the guardrail does not actively respond to shock absorption in the event of a car crash.

<Preceding technical literature>

Publication No. 10-2013-0107154

Published Patent Publication No. 10-1998-0014629

Utility Model Registration No. 20-0391820

Patent Application Publication No. 10-1378546

Patent Publication No. 10-2015-0020641

The present invention is proposed to solve the above problems of the conventional rod-shaped plastic guard rail. SUMMARY OF THE INVENTION An object of the present invention is to provide a rod-shaped plastic guard rail capable of guiding normal driving of an automobile while actively acting upon a vehicle collision and effectively absorbing and mitigating its impact. Another object of the present invention is to provide a rod-shaped plastic guard rail which can prevent the risk of further accidents by preventing the guardrail fragments from occurring due to the impact.

The rod-shaped plastic guard rail of the present invention is:

A rod-shaped plastic guard rail comprising a plurality of bins arranged coaxially and transversely installed in a plurality of posts arranged in line on a concrete base,

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

An inner cylinder disposed coaxially inside the outer cylinder and having a plurality of second ribs formed to protrude outwardly from an outer surface thereof and a fitting groove formed to closely insert the first rib between adjacent second ribs;

An intermediate layer connecting the end portions of the first and second ribs to be offset from each other such that when the inner and outer cylinders face each other, the end portions of the first ribs are positioned at the entrances of the fitting grooves;

Fixing means for installing the outer cylinder on one side of the post;

Including;

When an impact is applied to the surface of the outer cylinder, the intermediate layer is broken and the first rib is forcibly inserted into the fitting groove, and the impact is alleviated by the friction resistance continuously provided in the process;

It is characterized by.

Here, the fixing means is a fixing bolt penetrating through the tubular bridge connecting the inner and outer cylinders inside.

Preferably, the guardrail of the present invention further comprises a shock-absorbing synthetic resin foam filled in the fitting groove. In addition, the outer surface of the first rib and the inner wall of the fitting groove have a friction protrusion-groove structure corresponding to each other.

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

The foam is a conventional polypropylene foam.

According to the guardrail of the present invention, when an impact is applied to the surface of the outer cylinder, the intermediate layer is broken and the first rib is forcibly inserted into the fitting groove of the inner cylinder. In addition, the frictional resistance is continuously provided during the insertion process, and the inner and outer cylinder structures 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 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.

For example, when the impact on the guardrail is weak, the guardrail of the present invention can be restored to its original shape after being elastically cushioned, which has an effect that can help the vehicle to turn in the normal driving direction again. have.

1 is a perspective view of a general rod-shaped plastic guard rail is installed.

Figure 2 is a cross-sectional view of a conventional rod-shaped plastic guard rail.

3 is a perspective view of a rod-shaped plastic guard rail according to the present invention.

4 is a cross-sectional view of FIG.

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

6 is a cross-sectional view for explaining the action of the rod-shaped guardrail according to the present invention.

[Description of the code]

10. Guardrail

11. Bridge 12. Fixing bolt

20. Outer

21. Inner surface 22. First rib

23. Fitting groove 24. Friction protrusion

25.Air Hole

30. Inner barrel

31. Outer surface 32. Second rib

33. Fitting groove 34. Foam

35. Groove 36. Air hole

40. Middle layer

Features and effects of the rod-shaped plastic guard rail of the present invention (hereinafter referred to as 'guard rail') described above or not will become more apparent through the following description of the embodiments described with reference to the accompanying drawings. In the figures of figures 3 to 6, the guardrail according to the invention is indicated by reference numeral 10.

As in the case of FIG. 1, the guard rail 10 according to the present invention is installed in the transverse direction in a plurality of posts 3 vertically arranged in a row on the concrete base 2, and similarly to the case of FIG. 2. It is based on a rod-shaped plastic guard rail that includes two bins arranged coaxially. The infrastructure is mainly installed on the edge of a high price or a bridge to function to alleviate the impact caused by the collision of the vehicle while driving, but the present invention is not limited to the position and the shape of the base.

3 to 5, the guard rail 10 of the present invention is designed in a multi-structure structure using a synthetic resin material, specifically, the outer cylinder which can be defined by the meaning of the internal and external relationship is arranged substantially concentrically ( 20 and the inner cylinder 30, the outer cylinder 20 and the inner cylinder 30 is disposed between the inner and outer cylinders 20, 30 comprises an intermediate layer (40). In the drawings, the inner and outer cylinders 20 and 30 are formed in a substantially elliptical cross section, but the present invention is not limited to the form, and any shape may be formed in a rod or pipe shape extending in the transverse direction as a whole. There is no difference.

The outer cylinder 20 is a portion that provides a contact surface against external impact, and comprises a plurality of first ribs 22 protruding inward from the inner surface 21. The inner cylinder 30 also comprises a plurality of second ribs 32 protruding outward from the outer surface 31. In addition, the inner cylinder 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, preferably, the outer cylinder 20 likewise includes a fitting groove 23 formed such that the second ribs 32 can be tightly inserted between the first ribs 22 adjacent to each other. It is designed to.

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 are formed radially from the concentric shaft portion of the rod-shaped 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 cylinder 20. It guides the proper insertion into 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 the impact is applied to the apex of the cross section of the outer cylinder 20, the high point is gradually lowered, so that the 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 integral shape of the entire guardrail 10, and between the outer cylinder 20 and the inner cylinder 30 facing each other, the first rib 22 and the second rib 32 are separated from each other. It is a connecting means which integrally forms the inner / outer cylinder 20-30 structure by connecting an end part. Specifically, when the outer cylinder 20 and the inner cylinder 30 are disposed to face each other, the intermediate layer 40 may include a first rib (ie, an end portion of the first rib 22 positioned at an inlet of the fitting groove 33). 22) and end portions of the second ribs 32 are connected to each other with a disparity.

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. Here, the intermediate layer 40 forms one rotary waveform line by a continuous 'V' or round corresponding to the end shape of each rib 22 and 32.

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

PA, PC, POM (polyacetyl), PBT (polybutylene terephthalate), MPPO (modified polyphenylene oxide), which are known to have a strength that is used as an interior and exterior parts of automobiles as a material of the outer cylinder 20 ), An engineering plastic resin (EP.VC) selected from PET can be applied, and PE, PP, PVC, PS, ABS, AS (acrylonitrile styrene copolymer), and MBS (meth) as the material of the inner cylinder 30. General purpose plastic resin selected from krill resin) can be applied.

However, even when the inner cylinder 30 is used, the strength of the level close to the engineering resin is required as long as it is used for the guard rail 10 to which a significant impact is applied as a whole. Therefore, as a preferable example, a PC (Polycarbonate) resin having the highest impact strength among thermoplastic resins and engineering resins is used as the material of the outer cylinder 20. As the material of the inner cylinder 30, 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.

In the drawing, reference numeral 12 denotes a fixing means for installing the outer cylinder 20 and the guard rail 10 on one side of the post 3, and specifically, the fixing means 12 includes the outer cylinder 20 and the inner cylinder ( Fixing bolts penetrating through the tubular bridge (11) connecting the inside 30). However, if necessary for fixing the rigid post 3 of the outer cylinder 20 and the guard rail 10, a separate bracket structure may be used alone or in parallel.

Referring to FIG. 6, when the external impact R on the guard rail 10 is applied to the outer surface of the outer cylinder 20, the intermediate layer 40 connecting the outer cylinder 20 and the inner cylinder 30 is provided. The first rib 22 is forcibly inserted into the fitting groove 33 by cutting off, and the impact thereof is caused by frictional resistance between the first rib 22 and the fitting groove 33 which are continuously provided during the insertion process. This will be alleviated.

In order to further relieve the shock, preferably, the guard rail 10 of the present invention 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) to be firmly arranged 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 cylinder 20 of the material described above. And the cushioning properties of the guard rail 10 are ensured by the inner cylinder 30 of the material described above, the interaction between both ribs 22, 32, the foam 24, the friction protrusion-groove 24 and 35 corresponding structures. Is strengthened. Reference numerals 25 and 36 denote normal air holes for buffering which are formed in the longitudinal direction on each end face of the outer cylinder 20 and the inner cylinder 30.

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 cylinder 20 and the inner cylinder 30 are pressed 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.

If the impact applied to the guardrail 10 from the vehicle is not large, the guardrail 10 of the present invention is provided with the interaction between both ribs 22 and 32, the intermediate layer 40, the foam 24, The friction protrusion-concave grooves 24 and 35 can be used as a shock absorbing means, and the shock can be elastically dampened and then restored to its original shape. This process helps the vehicle to turn to the normal driving direction again. Can be.

Claims (11)

A rod-shaped plastic guard rail comprising a plurality of bins arranged coaxially and transversely installed in a plurality of posts arranged in line on a concrete base, An outer cylinder 20 which provides a contact surface against external impact and includes a plurality of first ribs 22 protruding inwardly from the inner surface; The fitting groove disposed inside the outer cylinder and formed to closely fit the first rib 22 between the plurality of second ribs 32 protruding outward from the outer surface and the adjacent second ribs 32 ( An inner cylinder 30 in which 33 is formed; When the outer cylinder 20 and the inner cylinder 30 are disposed to face each other, the ends of the first and second ribs 22 and 32 such that the ends of the first ribs 22 are located at the inlet of the fitting groove 33. Intermediate layer 40 to connect the gaps; Fixing means for installing the outer cylinder 20 on one side of the post (3); Including; When an impact is applied to the surface of the outer cylinder, the intermediate layer 40 is cut off and the first rib 22 is forcibly inserted into the fitting groove 33, and the impact is alleviated by the friction resistance continuously provided in the process. that; Rod-shaped plastic guard rail, characterized in that. The method of claim 1, The fixing means is a rod-shaped plastic guard rail, characterized in that the fixing bolt 12 penetrating through the tubular bridge (11) connecting the outer cylinder (20) and the inner cylinder (30). The method of claim 1, The guardrail, rod-shaped 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 cylinder 20 is a rod-shaped 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 rod-shaped plastic guard rail, characterized in that the end is formed in a pointed or round shape. The method of claim 1, Rod-shaped plastic guard rail, characterized in that the outer surface of the first rib (22) and the inner wall of the fitting groove (33) has a corresponding friction protrusion-groove (24, 35) structure. The method of claim 1, Rod-shaped plastic guard rail, characterized in that the first rib (22) and the second rib (32) formed radially from the center of the concentric. 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. Rod-shaped plastic guard rail, 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 8, The intermediate layer (40) is a rod-shaped plastic guard rail, characterized in that to form one continuous corrugated wave line by a continuous 'V' or round corresponding to the end shape of each rib (22, 32). The method of claim 1, As the material of the outer cylinder 20, a PC resin material of thermoplastic engineering plastic resin is applied, and as the material of the inner cylinder 30, PA, PC, POM (polyacetyl), PBT (polybutylene terephthalate), MPPO (modified) Polyphenylene oxide), a rod-shaped plastic guard rail, characterized in that the 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 3, The foam 34 is a rod-shaped plastic guardrail, characterized in that the ordinary polyethylene foam.

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