KR101869058B1

KR101869058B1 - Guard rail for multistage shock absorption by rail having vertically asymmetrical shape

Info

Publication number: KR101869058B1
Application number: KR1020170127722A
Authority: KR
Inventors: 이경배
Original assignee: 주식회사 국제에스티
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2018-06-20

Abstract

The present invention adopts a structure in which the fixing bolts are prevented from protruding while easily fastening the fixing bolts for mounting the rails on the supporting pillars by effectively mitigating the impacts in the event of a vehicle collision through plastic deformation and multiple buffer structures of the rails and the rigid- To a multi-stage shock-absorbable guardrail through a rail having an up-down asymmetric structure.
The present invention provides a support structure, comprising: a support having a lower end inserted and fixed in the ground; A connecting portion formed with a fastening hole to be coupled to the strut by the fixing bolt, and an upper protrusion and a lower protrusion protruding upward and downward in the height direction with respect to the connecting portion as a reference, wherein the upper protrusion and the lower protrusion A rail having a protruding length differentially formed; And the other end of the through hole is bent toward the upper or lower protrusion and the end of the through hole is in contact with or adjacent to the upper protrusion or the lower protrusion, And a rigid steel plate disposed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a guard rail for a multi-stage shock-absorbing structure,

More particularly, the present invention relates to a guard rail, which effectively mitigates an impact at the time of a vehicle collision through plastic deformation of a rail and a rigid steel plate and a plurality of cushioning structures, and a fixing bolt for mounting a rail on a support, To a multi-stage shock-absorbable guardrail through a rail having a vertically asymmetric structure.

Guard rails installed at the center of a road or both sides of a road on which a vehicle travels are safety equipment for invading a center line of a vehicle, preventing a road departure, entering or falling into a sidewalk, and are usually installed at regular intervals. And a fence formed by the rail connected continuously in the horizontal direction.

Such a guard rail basically functions to prevent a secondary accident by restricting the departure of a vehicle out of the normal path, and by absorbing the collision energy through plastic deformation when the vehicle collides with the vehicle, it is possible to reduce the damage of the vehicle and the injury of the occupant It is being developed as a structure.

However, due to the cost structure and the material limit of the guard rail installation, there is a limit to the absorption of the impact energy, so that the vehicle damage due to the excessive impact at the time of collision of the vehicle running at high speed and the driver's injury still occur.

Particularly, when a vehicle is caught by a guard rail structure damaged during a vehicle collision due to a structure in which a bolt and a nut are used for coupling and fixing a buffer structure such as a strut and a rail and a tip of the coupling means protrudes outward, It is the role of the guard rail installed for the safety such as the accident of the second accident or the overturning due to the accident when the SUV, This has been an inconvenient problem.

In order to solve this problem, research and development have been carried out for the structure of the guard rail and the safety for securing safety, including height adjustment and strength reinforcement work of the conventional installed guard rails, but the reinforcement work of the guard rails is performed by replacing the installed guard and the existing guard rail , The replacement cost is very high, and the research and development achievements are also complicated due to the complicated structure, which makes it difficult to produce, install, and repair.

Korean Patent No. 10-1250534 (March 31, 2013)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a railway vehicle having two rails having a vertically asymmetric structure, plastic deformation of a steel plate corresponding to each rail, A shock absorber capable of effectively absorbing a shock in a multi-stage shock-absorbing manner through a rail having a vertically asymmetric structure.

Another object of the present invention is to provide a multi-stage shock-absorbable guardrail through a rail having a vertically asymmetric structure adopting a structure in which a fixing bolt for mounting a rail on a support is easily fastened even when the fixing bolt is not projected .

According to an aspect of the present invention, there is provided a multi-stage shock-absorbable guardrail through a rail having a vertically asymmetric structure, comprising: a support having a lower end inserted and fixed in the ground; A connecting portion formed with a fastening hole to be coupled to the strut by the fixing bolt, and an upper protrusion and a lower protrusion protruding upward and downward in the height direction with respect to the connecting portion as a reference, wherein the upper protrusion and the lower protrusion A rail having a protruding length differentially formed; And the other end of the through hole is bent toward the upper or lower protrusion and the end of the through hole is in contact with or adjacent to the upper protrusion or the lower protrusion, And a rigid steel plate disposed.

The lower protrusion is further protruded toward the road side relative to the upper protrusion, and the ends of the upper protrusion and the lower protrusion are bent inwardly so that the ends of the upper protrusion and the lower protrusion may be deformed in respective inward directions do.

And the other end of the steel plate is deformed along a curved surface of the groove portion when the vehicle is impacted by the vehicle, and the other end of the steel plate is deformed along the curved surface of the groove portion, And are arranged to be shifted with respect to the transverse center of the groove portion.

One end of the steel plate is bent in a 'C' shape to form a buffer space between the support and the rail.

In addition, it is preferable that at least one pair of protrusions protruding in the vertical direction is formed in the fastening hole or the through hole so as to be relatively smaller than the outer diameter of the fixing bolt.

According to the present invention, it is possible to minimize the damage to the passenger and the vehicle by effectively mitigating the impact at the time of a vehicle collision through plastic deformation and multiple buffer structures of two rails having a vertical asymmetric structure and a steel plate corresponding to each rail .

According to the present invention, the fastening bolt for fastening the rail to the support is easily fastened from the outside, but the fastening bolt does not protrude, so that the fastening operation is convenient. There is an advantage that breakage can be prevented.

1 is a perspective view showing the construction of a guard rail according to an embodiment of the present invention,
Fig. 2 is a sectional view showing the construction of the guard rail according to the embodiment,
3 is an exploded perspective view showing a configuration of a guard rail according to the present embodiment,
4 to 7 are diagrams showing a shock absorption process due to deformation of the guard rail in the event of a vehicle collision.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a structure of a multi-stage shock-absorbable guard rail through a rail having a vertically asymmetric structure according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view illustrating the construction of a multi-stage shock-absorbable guard rail through a rail having a vertically asymmetric structure according to an embodiment of the present invention. FIG. 2 is a cross- Fig. 3 is an exploded perspective view showing a configuration of a guard rail according to the present embodiment. Fig. 4 to 7 are diagrams showing a shock absorption process due to deformation of the guard rail when the vehicle is collided.

The present invention is a guard rail in the form of a fence (fence) comprising basically a column 10 fixed to the floor at the bottom and a rail 20 transversely coupled to the column 10, (20).

The struts 10 are made of steel pipes and are vertically embedded in the ground, and are installed at regular intervals along the road. It can be made into various standards suitable for the road environment, and it is preferable to use a round or square steel pipe. In this case, when an external impact is generated, stress may be concentrated on the contact portion between the support 10 and the ground, so that the support 10 and the reinforcement portion in the form of a pipe, which is inserted into the inside of the support 10, 11) can be installed.

The rail 20 is laterally mounted on the front surface of the strut 10 and exposed to the road side as a structure constituting a fence. These rails 20 may be constituted of one or two of the same structure may be arranged parallel to each other and spaced apart from the upper and lower portions of the support 10 as in the present embodiment, So that the rail 20 has an open space.

The rail 20 according to the present embodiment is constituted by a connecting portion 21, an upper projection portion 22 and a lower projection portion 23. The connecting portion 21 is formed with a fastening hole 21a through which the fixing bolt B can pass and is fixed to the supporting post 10 by the fastening bolt B. [ At this time, at least one pair of protrusions 21b projecting upward and downward may be formed in the fastening hole 21a so as to be smaller than the outer diameter of the fixing bolt B. 3, a pair of protrusions 21b are formed at the center of the fastening hole 21a. However, the pair of protrusions 21b are formed in two Or more.

This is a structure for alleviating an impact applied to the rail 20 fastened with the fixing bolt B and the nut N in the event of a vehicle collision and the impact force by the vehicle colliding with the rail 20 is applied, The fixing bolt B passes over the resistance by the protrusion 21b to absorb the impact force of the vehicle while the rail 20 is slidingly moved.

The rail 20 has upper and lower protrusions 22 and 23 protruding along the road from upper and lower sides in the height direction with respect to the connecting portion 21. It is preferable that the upper and lower protrusions 22 and 23 are formed by bending a plate member integrally formed with the connecting portion 21. The protruding lengths of the upper and lower protrusions 22 and 23 Respectively.

The lower projecting portion 23 may be formed so as to protrude further toward the road side relative to the upper projecting portion 22 but the upper projecting portion 22 projects more toward the road side than the lower projecting portion 23 as shown in Fig. .

The upper and lower protrusions 22 and 23 are formed in a substantially C shape so that the ends of the upper and lower protrusions 22 and 23, Are inwardly bent so as to be deformed in respective inward directions. That is, if the ends of the upper and lower protrusions 22 and 23 are deformed in the outward direction when the vehicle is impacted, if the ends of the upper and lower protrusions 22 and 23 are scattered by the ends, the damage of the vehicle may be increased. It is impossible to absorb the external impact particularly after the occurrence. Therefore, in order to prevent these two phenomena, the ends of the upper projection 22 and the lower projection 23 are bent inward.

On the road side projecting surface of the upper projecting portion 22 or the lower projecting portion 23, a continuous groove portion 24 is formed in the transverse direction. The groove portion 24 is formed on the road side protruding surface of the upper protruding portion 22 protruding relatively less than the lower protruding portion 23 in the present embodiment. However, the groove portion 24 may also be formed on the lower protruding portion 23. The grooves 24 are continuously formed in the center in the middle to improve the strength of the rail 20, thereby inducing the deformation of the rail 20 at the central portion of the rail 20 caused by the impact. As a result, .

Particularly, in the present embodiment, the grooves 24 are formed in the upper protrusions 22 to induce the deformation direction of the steel plate 30 extending toward the upper protrusions 22 so that the rails 20 contact the steel plate 30 In order to increase the amount of absorption of the impact of the vehicle.

The rigid steel plate 30 is interposed between the rail 20 and the column 10 and is deformed together with the rail 20 to efficiently absorb the impact of the vehicle. And a through hole 31 interposed between the supports 10 and into which the fixing bolt B is inserted and the other end bent toward the upper protrusion 22 or the lower protrusion 23, Are disposed in contact with or adjacent to the upper projection 22 or the lower projection 23.

At this time, one end of the steel plate 30 is bent in a 'C' shape to form a buffer space S between the column 10 and the rail 20. This is because the fixing bolt B is fastened through the buffer space S and the cushioning steel plate 30 is finely bent at this time, So that the rail 20 can be gripped more firmly. This allows the rail 20 and the rigid steel plate 30 to have more resistance to the fixing bolt B when the fixing bolt B passes through the projection 21b of the fastening hole 21a in the event of a vehicle collision, So that shock absorption by the rail 20 finally becomes possible after the initial deformation of the rail 20 has elapsed.

The other end of the steel plate 30 is bent toward the upper protrusion 22 in a state of being in contact with the support 10 and the end of the steel plate 30 is in contact with or adjacent to the back surface of the protruded surface of the upper protrusion 22 . At this time, the other end of the steel plate 30 is preferably deformed along the curved surface of the groove 24 when the vehicle is impacted, and is arranged to be offset from the center of the groove 24 in the lateral direction .

Next, the operation of the guard rail according to the present embodiment will be described with reference to Figs. 4 to 7. Fig.

4, when the vehicle collides against the guard rail, a shock is primarily applied to the lower protruding portion 23, so that the lower protruding portion 23 is pushed in the direction of the strut 10, 23 are brought into contact with the support pillars 10 and deformed inwardly of the lower projecting portion 23 by the bent shape. This process primarily absorbs the impact of the vehicle.

Thereafter, when the vehicle collides against the upper projection 22, the deformation of the rail 20 is induced in the central portion by the groove portion 24 formed continuously in the transverse direction, whereby the vehicle is damaged due to irregular breakage, Injury is prevented.

When the upper protrusion 22 is deformed rearward due to the deformation of the groove 24, an external force is applied to the end of the steel plate 30 at the groove 24. The end of the steel plate 30 reaches the groove 24, As shown in Fig. 5, when the vehicle is impacted, it is deformed along the curved surface of the groove portion 24 and absorbs the impact, as shown in Fig.

6, the lower end of the lower protrusion 23 protrudes along the support 10, and the lower protrusion 23 and the upper protrusion 22 are deformed together, When the steel plate 30 is moved and deformed, when it comes into contact with one end of the steel plate 30, the movement is limited and acts again as a resistance. The other upper plate 22 of the steel plate 30 is deformed and buckled to absorb the impact .

In addition, as shown in FIG. 7, the fixing bolt B inserted into the fastening hole 21a can overcome the resistance by the protrusion 21b and absorb the impact amount again while moving. As described above, since the buffer space S formed by the steel plate 30 performs a function similar to that of the spring washer, the rail 20 is more firmly gripped by the fixing bolt B, More resistance is applied to the fixing bolt B when the fixing bolt B passes through the protrusion 21b of the fastening hole 21a so that the initial deformation of the rail 20 and the rigid steel plate 30 So that shock absorption by the rail 20 finally becomes possible.

It is to be understood that the invention is not limited to the disclosed embodiment, but is capable of many modifications and variations within the scope of the appended claims. It is self-evident.

10: support 11: reinforcement
20: rail 21: connecting portion 22:
23: Lower protrusion 24: Groove
30: Steel plate of steel plate 31: Through hole
B: Fixed bolt S: Buffer space

Claims

A strut (10) having a lower end inserted and fixed in the ground;
A connecting portion 21 formed with a fastening hole 21a so as to be coupled to the strut 10 by a fixing bolt B and an upper portion and a lower portion protruding from the connecting portion 21 in the height direction, A rail 20 having upper and lower protrusions 22 and 23 with different protruding lengths of the upper and lower protrusions 22 and 23; And
And a through hole 31 through which the fixing bolt B is inserted and which is interposed between the rail 20 and the column 10 while the other end is in contact with the column 10, 22 or the lower projecting portion 23 of the upper projecting portion 22 and the lower projecting portion 23 and the end of the upper projecting portion 22 or the lower projecting portion 23 is in contact with or adjacent to the rear side of the road- 30, < / RTI >
A continuous groove 24 is formed on the road side projecting surface of the upper projection 22 or the lower projection 23,
The other end of the steel plate 30 is deformed along the curved surface of the groove 24 when the vehicle is impacted, and is arranged to be offset from the center of the groove 24 in the lateral direction so as to absorb impact. Multistage shock absorbable guardrail through rail with asymmetrical top and bottom structure.

The method according to claim 1,
The lower protruding portion 23 protrudes further toward the road side relative to the upper protruding portion 22 and the ends of the upper protruding portion 22 and the lower protruding portion 23 are formed such that, Wherein the guide rails are bent inward so as to be deformed in an inner direction.

delete

The method according to claim 1,
Wherein one end of the rigid steel plate 30 is bent in the form of a 'C' to form a buffer space S between the struts 10 and the rail 20. The multi- Shock-absorbable guard rails.

The method according to claim 1,
Wherein at least one protrusion (21b) protruding in the vertical direction is formed in the fastening hole (21a) or the through hole (31) so as to be relatively smaller than the outer diameter of the fixing bolt (B) Multistage shock absorbable guardrail through rail with asymmetric structure.