KR20100077866A - Shock absorbing device of guard rail - Google Patents

Abstract

PURPOSE: A shock absorbing structure of a guardrail is provided to effectively absorb and reduce striking energy when a vehicle collides with a guardrail by transforming a plastic deformation member and an elastic member in order. CONSTITUTION: A shock absorbing structure of a guardrail comprises a shock absorbing member(30). The shock absorbing member is composed of a plastic deformation member(31) and an elastic member(33). The elastic member is located inside the plastic deformation member and is moved with the plastic deformation member. The elastic member is a coil spring or a plate spring.

Description

Shock absorbing structure of guard rail {Shock absorbing device of guard rail}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a guard rail for preventing the vehicle from falling off or overturning when installed on a roadside, a median or a railing of a bridge. More specifically, the vehicle absorbs the impact energy when the vehicle collides with the guardrail. The present invention relates to a shock absorbing structure for mitigating.

In general, the road guardrail is a guardrail plate 10 formed by bending the iron plate, as shown in Figure 1, the steel pipe or concrete support 20, and the guard rail plate 10 and the support 20 Consists of a buffer member 30 for fixing the connection.

The guardrail plate 10 is a rigid member designed to have a predetermined strength to withstand a predetermined impact energy, and the shock absorbing member 30 has a strength lower than or equal to that of the guardrail plate 10. Since the guard rail plate 10 is set, the member is configured to be deformed first before being damaged, and the support 20 is a rigid member that is set to have a strength greater than the design strength of the guard rail plate 10 described above.

When the vehicle collides with such a guard rail, the guard rail plate 10 is first impacted, and the impact is secondly transmitted to the support 20 through the shock absorbing member 30.

Therefore, when the impact energy due to the collision of the vehicle is slight, it is primarily absorbed and relaxed by the rigidity of the guard rail plate 10 and the deformation of the shock absorbing member 30, and when it is stronger, the guard rail plate 10 and the shock absorbing member ( 30) are attenuated by deforming or breaking together, and when the impact energy is very strong, the prop 20 is finally absorbed by deforming or collapsing, and the accident vehicle develops to a situation where it breaks beyond the boundary of the guard rail. .

As a result, the absorbing or mitigating method for impact energy has to be coped with by increasing the overall rigidity of the guard rail or by absorbing and mitigating the shock in various forms in relation to the structure of the guard rail plate or the buffer member. .

First of all, the approach to increase the stiffness of the guard rail as a whole can prevent the departure of the vehicle or the damage of the facility to the upper level. Excessively high problems will follow.

Therefore, the prior arts are mostly solved by the second method, that is, the improvement structure of the guard rail plate or the cushioning member, and among them, the technologies related to the improvement of the cushioning member occupy almost the majority.

And these prior art is largely a mechanism or a combination structure of the shock absorbing or mitigated by elastic deformation and plastic deformation.

Domestic utility model registration No. 20-0229387 (Registration date 2001.04.21) shown in Figure 2 "road guardrail" is a typical example of the method of absorbing and mitigating impact energy by elastic deformation, such elastic The deformation method absorbs and mitigates the impact energy caused by the collision of the vehicle, but has a problem that the rebound shock is transmitted to the vehicle or the driver again by the resilient force of the secondary elastic body that tries to return to the original shape. .

Domestic Patent Publication No. 10-2004-0086115 shown in Figure 3 (published date 2004.10.08) "guard rail absorbing structure" is an example of absorbing the impact energy by plastic deformation, in this case Since the elastic body is plastically deformed, the impact energy is effectively absorbed, but there is a problem that the structure itself is damaged once it cannot be returned even in a relatively weak impact.

Korean Patent Publication No. 10-2008-0102017 (published date 2008.11.24) shown in Figure 4 "double-off structure road shock absorber" is an example of a combination of plastic deformation and elastic deformation, In the case of a vehicle crash accompanied with a strong impact energy exceeding plastic deformation, the secondary elastic restoring force by the leaf spring 2 acts, which is still another risk factor.

Other elastic materials such as rubber or soft synthetic resins are also sometimes used as shock absorbers, but these elastic materials have a disadvantage in that they are not effective due to a problem that the elastic force itself is damaged due to aging and deterioration over time.

The present invention focuses on the problems of the prior art as described above, and more effectively absorbs and attenuates strong impact energy caused by a vehicle crash, thereby minimizing hazards to the occupants as well as damage to the guardrail or the vehicle. The purpose is to propose a shock absorbing attenuation structure of the rail.

The present invention for achieving the object as described above is characterized by consisting of the following technical solutions.

That is, in the present invention, the shock absorbing member is composed of a plastic deformation member and an elastic member, but by placing the elastic member in the plastic deformation member having an outer structure, the secondary elastic repulsion of the elastic member is performed within the modified plastic deformation member. Suppression is a fundamental feature.

In addition, the elastic member of the present invention has a secondary feature that the coil spring or the leaf spring may be configured selectively or in combination.

According to the present invention, since the elastic member is positioned and behave together in the deformation space of the plastic deformation member as described above, the plastic deformation member and the elastic member deform together to sequentially absorb the impact energy, thereby absorbing the impact energy. The structure is doubled so that the structure will not be damaged or destroyed in the event of a severe collision.

In addition, when impact energy exceeding a certain strength is applied, the elastic member is trapped in the deformed plastic deformation member or the elastic restoring force is remarkably suppressed so that no secondary elastic shock occurs, thereby minimizing the risk factors for the vehicle or the occupant. It is effective.

In addition, the present invention is not only the elastic member is accommodated in the plastic deformation member, but also the elastic member that is accommodated can be combined or overlapped with a coil spring and a leaf spring, such that the advantage that can effectively utilize the installation space or area of the facility structure It is expected.

If the present invention is described in detail with reference to the accompanying drawings for the case applied to the cushioning member of the guardrail as follows.

The buffer member 30 illustrated in FIG. 5 is a case in which the coil spring 32 is embedded as an elastic member in the trapezoidal plastic deformation member 31. The gap between the guardrail plate 10 and the support 20 is increased. Applicable for relatively large cases.

FIG. 6 illustrates a case in which the leaf spring 33 is installed as an elastic member in the plastic deformation member 31 having a rectangular shape. In this case, the spacing between the guard rail plate 10 and the support 20 is relatively narrow. It is a suitable form.

FIG. 7 is a structure in which the coil spring 32 and the leaf spring 33 are incorporated in the plastic deformation member 31 as an elastic member, and can be applied when the elasticity of the elastic member is remarkably strengthened.

In any case, the plastic deformation member 31 illustrated above has a closed shape, and flanges 34 are formed at both ends of the side in contact with the guardrail plate 10.

The plastic deformation member 31 is integrally connected and fixed to the guardrail plate 10 at the portion of the flange 34 by a riveting or bolting method, and again the support 20 and the guardrail plate 10. Silver penetrates the plastic deformation member 31 and the elastic members 32 and 33 together by a bolt 35.

According to the present invention configured as described above, the impact energy applied to the guardrail plate 10 during a vehicle crash acts as an external force on the shock absorbing member 30 and finally is transmitted to the support 20, and the external force is first absorbed by the shock absorbing member ( It is applied to the plastic deformation member 31, which is the outer side of the 30.

Therefore, when an external force of a certain strength or more acts, deformation such as deformation of the plastic deformation member 31 must occur, but at this time, the elastic member 32 is supported by the elastic member 32, thereby elastically absorbing the impact energy, thereby deforming the plastic deformation member. Deterioration such as crushing does not occur in the 31 within the set strength range of the guardrail plate 10 described above.

And when the external force much greater than the set strength is applied, the plastic deformation member 31 with the elastic member 32, as well as plastic deformation, that is, the degree of undulation, not only absorbs the impact energy once again, In the process, the elastic member 32 continuously absorbs shock while elastically deforming, thereby doubled the impact reduction ability.

When the plastic deformation member 31 is completely crushed through this process, the elastic member 32 trapped therein also loses or restrains the elastic restoring force, so that the secondary shock by the elastic restoring force is not transmitted to the crash vehicle or the occupant. Will not.

Therefore, the present invention can more effectively absorb and attenuate the impact energy due to the vehicle crash, and minimize the physical damage of the vehicle or the occupant.

The above example is an example in which the present invention is applied to the cushioning member of the guardrail, but it can be applied to a similar technical field such as an automobile bumper or a ship's eyepiece, that is, a fender having the same technical purpose or function.

1 a and b is a structural diagram of a conventional guard rail

Figure 2 is a plan sectional view of the guardrail absorbing the impact energy by the conventional elastic deformation.

Figure 3 is a plan sectional view showing a state after the impact of the guard rail absorbing the impact energy by the plastic deformation.

Figure 4 is a side cross-sectional view of the guard rail combining the conventional elastic deformation and plastic deformation.

Figure 5 is a cross-sectional plan view of the coil spring is built into the elastic member in the plastic deformation member in the shock attenuation structure of the present invention.

Figure 6 is a plan sectional view of a state in which the leaf spring is built into the elastic member in the plastic deformation member in the impact reduction structure of the guard rail of the present invention.

7 is a cross-sectional plan view of a coil spring and a leaf spring in a state in which the elastic spring in the plastic deformation member is a composite structure in the plastic deformation member.

<Explanation of symbols for the main parts of the drawings>

10: guardrail plate 20: prop

30: buffer member 31: plastic deformation member

32: coil spring 33: leaf spring

34: Frenzy

Claims (2)

In the road guardrail consisting of the guard rail plate 10, the support 20 and the buffer member 30 for linking them, The shock absorbing member 30 is composed of a plastic strainer 31 and an elastic strainer 32, 33, but the elastic strainer 32, 33 is inserted into the plastic strainer 31 and behaves together. Impact reduction structure of the road guardrail characterized in that. The method of claim 1, The elastic deformation member (32) (33) is selected from the coil spring (32) or the leaf spring (33) or a composite of the road guardrail, characterized in that configured in combination.

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