JP2906013B2 - Guard fence - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guard fence to be installed on a road shoulder, a boundary between a road and a sidewalk, a median strip, or the like, and a guard fence as a railing for a bridge car.

[0002]

2. Description of the Related Art Generally, guard fences conventionally used in practice include a steel guard rail, a reinforced concrete automatic guard or a guard cable using a wire rope. However, of these two
The guard rail and the automatic guard have the disadvantage of poor shock absorption, and the guard cable of the latter has a certain degree of shock absorption but is insufficient in strength.

[0003] Insufficient shock absorption leads to injuries to the driver of the vehicle and passengers, and furthermore to life-threatening accidents. Insufficient strength leads to damage to the guard fence, which causes the vehicle to jump off the road or to fall. Cause. In particular, a vehicle jumping into the opposite lane beyond the median has the risk of causing a double-triple accident.

[0004] Further, the guardrail which is most frequently used at present is described in detail. In the conventional guardrail, generally, when a vehicle collides with the guardrail at an incident angle of, for example, 15 degrees or less, impact energy is generated by the guardrail rail. And is designed to guide the vehicle back to the original road without leaving the vehicle. For this reason, the struts supporting the rails are designed to fall outward at a certain angle, for example, within 15 degrees due to a vehicle collision so that a considerable amount of impact energy is absorbed.

However, in reality, a collision of a vehicle with a guard rail frequently occurs at a steep angle exceeding the above-mentioned certain incident angle. The rail bends at an unexpected angle, and the strut does not fall out as designed and does not absorb impact energy, so that the vehicle collides with the strut or rebound energy as it was at the time of the collision. The vehicle may be swung toward the road side, possibly causing a double accident with an oncoming vehicle or the like.

[0006]

SUMMARY OF THE INVENTION In view of the foregoing, the present invention provides a driver and a passenger with a sufficient strength, and in particular, a guard fence having a structure that is extremely shock absorbing. At the same time as reducing the impact, the repulsive energy received by the vehicle is greatly reduced, and the effect of guiding the vehicle to the original road is improved, so that accidents can be reduced as much as possible compared to installing a conventional guard fence. It is intended to prevent or reduce.

In particular, measures against an increase in the number of vehicles in recent years and an increase in accidents caused by speeding up of vehicles on a highway or the like are one of urgent issues, and the present invention can effectively contribute to this. The task is to provide guard fences.

[0008]

The present inventors Means for Solving the Problems] As a result of study repeated various experiments in order to solve the above problems, long
Fences are connected to multiple columns via the shock absorbing mechanism
In a guard fence connected in a horizontal manner,
Before being located between the fence and the strut as a shock absorption mechanism
With the rear shock absorber and the rear shock absorber
Both shock absorbing mechanisms of the shock absorbing mechanism are provided independently
A guard fence characterized by being provided.

Here, the shock absorbing mechanism means a mechanism that absorbs a shock by a mechanical mechanism. Conventionally, taking the example, for example, in the guard rule, rails directly by a bracket mounted to the support rail that was not less attached to the strut through a mechanical shock absorbing mechanism.

[0010] Generally, the shock absorbing mechanism section is supported by a fence section.
A front shock absorbing mechanism located between the columns is provided.
The invention, together with the front shock absorbing mechanism, is positioned behind a column.
A rear shock absorbing mechanism is provided for
The biggest feature is that the shock absorbing mechanisms are provided independently of each other.
It is a sign.

A typical example of the front shock absorbing mechanism is a mode in which a compression spring function section or a hollow pipe is interposed between the fence and the column, and a typical example of the rear shock absorbing mechanism is. As an embodiment, there is an embodiment in which a tension spring function unit directly or indirectly connected to the fence unit is provided at a position behind the support. Here, the compression spring function unit refers to a spring having a function of restoring the spring to its original state against a load that compresses the spring when applied, and a tension spring function. The portion refers to a spring having a function of restoring the spring to its original state against a load applied to pull the spring.

The guard fence in this specification refers to a guard fence installed at the shoulder of a road or a boundary between a roadway and a sidewalk, a median strip, or the like, and also includes a guard fence as a railing for a bridge car, and the like. Is for general roads and other highways.

[0013]

According to the present invention, when the vehicle collides with the fence, since the fence is connected to the support via the shock absorbing mechanism such as the compression spring function, the hollow pipe or the tension spring function. In addition, the impact energy is effectively absorbed by the impact absorbing mechanism. As a result, the impact given to the driver, including the driver, is significantly reduced, and the repulsive energy received by the vehicle is greatly reduced, whereby the vehicle is prevented from jumping into the opposite lane or the like. You will be guided along the natural and original road.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIGS. 1 to 5 are views showing a typical embodiment of the present invention, and show a state in which a fence 1 is connected to a column 2 via shock absorbing mechanisms 3 and 4. FIG.

FIG. 1 is a side view, FIG. 2 is a front view, FIG. 3 is a plan view, and FIG. 4 is a rear view. In FIG. 4, the lower part of the column is omitted. FIG. 5 is a detailed view showing a rectangular wavy line portion in FIG. 3 in an enlarged manner.
As shown in these drawings, in the present embodiment, as a shock absorbing mechanism, together with a front shock absorbing mechanism 3 located between the fence 1 and the column 2, a rear shock absorbing mechanism 4 located behind the column 2. Are provided.

The front shock absorbing mechanism 3 is constituted by a hollow pipe having an elliptical cross section interposed between a pipe-shaped fence 1 and a column 2 having a T-shaped horizontal cross section. In these connection modes, first, the shock absorbing mechanism fixing shaft 5 is arranged in the order of the rear shock absorbing mechanism 4, the support 2 and the front shock absorbing mechanism 3 from the back of the column 2 whose base is fixed by the anchor bolt 9. After penetrating, a fence section fixing pipe 6 is fixed to the tip of the shock absorbing mechanism section fixing shaft 5.

The fence section fixing pipe 6 is a relatively short pipe for fixing the fence section 1, and the pipe-shaped fence section 1 is extrapolated from both ends of the fence section fixing pipe 6. The two fences 1 are connected and fixed together. The fence unit 1 may be inserted into the fence unit fixing pipe 6 in a form of interpolation. Also, the fence section fixing pipe 6 and the fence section 1
Is fixed to the front shock absorbing mechanism 3 made of a hollow pipe by a bolt A7. Further, the front impact absorbing mechanism 3 is fixed to the column 2 with bolts B8.

On the other hand, the rear shock absorbing mechanism section 4 is provided with a tension spring function section comprising a ring spring 4a. One end of the ring spring 4a is fixed to the column 2 and the other end is fixed to the shock absorbing mechanism fixing shaft 5. Further, a cover 4b is covered on the tension spring function part. In this way, the tension spring function part is provided with the shock absorbing mechanism part fixing shaft 5.
Is indirectly connected to the fence unit 1 via

When the vehicle collides with the guard fence constructed as described above, the impact energy is firstly absorbed by deforming the elliptical hollow pipe of the front impact absorbing mechanism 3, and then the elliptic. When the hollow pipe is deformed and flattened, the shock absorbing mechanism fixing shaft 5 is pushed backward, and at the same time, the ring spring 4a of the rear shock absorbing mechanism 4 is stretched to be in an extended state. The target is absorbed. Further, a restoring force for restoring the original state is generated in the extended ring spring 4a, and the vehicle is naturally guided to the original road along the fence 1 by this action.

As described above, in the embodiment in which the front shock absorbing mechanism 3 and the rear shock absorbing mechanism 4 are provided together, the impact energy at the time of a vehicle collision can be absorbed in two stages, primary and secondary, and the impact energy can be absorbed. It is possible to suitably cope with various collision phenomena having different sizes. For example, the front shock absorbing mechanism is configured to exclusively absorb relatively small shock energy, and when a large shock energy exceeding the absorbing capacity of the front shock absorbing mechanism acts, the rear shock absorbing mechanism is substantially It can be configured to operate for the first time to effectively function against various collision phenomena of different magnitudes of impact energy.

In this embodiment, the front shock absorbing mechanism 3 is formed of a hollow pipe, but may be formed of, for example, a plate spring or another member having a compression spring function. In the case of such an embodiment, the action of the compression spring function unit provides a guiding effect of guiding the vehicle to the original road. In order to properly exert the guidance effect, it is necessary to control the repulsive energy applied to the vehicle and return the vehicle to an appropriate position on the original road. Therefore, it is desired to optimally design the configuration of the front shock absorbing mechanism and the rear shock absorbing mechanism of the present invention in accordance with the traffic situation and other environment of the place where the guard fence is installed.

FIG . 6 is a front impact absorbing mechanism according to the present invention.
FIG. 7 is a side view showing another embodiment of the rear shock absorber.
The components are not shown. Rail-shaped fence 1
The section is connected to the column 2 via a front shock absorbing mechanism 3 having an S-shaped compression spring mechanism. The fence 1 and the front shock absorbing mechanism 3 are blanket 10
And the front shock absorbing mechanism 3 and the support 2 are fixed by bolts C11, respectively.

The front shock absorbing mechanism of this embodiment also has a remarkable effect of absorbing shock energy when a vehicle collides, as compared with the conventional embodiment in which the fence is directly fixed to the column 2 by the bracket 10. Big.

The compression spring function part has a circular shape in addition to the S shape.
An elliptical or leaf spring or another having a suitable compression spring function may be selected and used as needed. The material of these compression springs, the hollow pipes and ring springs that constitute the shock absorbing mechanism shown in FIGS. 1 to 5 may be made of, for example, SS41 steel, steel, hard rubber, or other appropriate materials.

[0025]

As described above, according to the present invention, since the fence is connected to the support via the shock absorbing mechanism, the shock absorbing mechanism effectively absorbs the impact energy at the time of collision. . For this reason, it is possible to significantly reduce the impact received by the driver and the passenger at the time of the collision, and to prevent or reduce the occurrence of casualties due to the impact as much as possible.

In addition, since the repulsive energy received by the vehicle is also significantly reduced, the vehicle is normally guided along the fence to the original road naturally, and the vehicle jumps out into the opposite lane and causes a secondary accident. Can be prevented. In particular, the mode in which both the front and rear shock absorbing mechanisms are provided is effective for various collision phenomena having different magnitudes of impact energy by appropriately designing the impact energy absorbing performance of each. Can respond.

Furthermore, the present invention is extremely effective in increasing the speed of a vehicle on a highway or the like in recent years. In other words, for example, in order to improve the strength of the conventional guard fence, some ways to increase the number of columns and narrow the spacing between the columns have been studied, but in such an aspect, the absorption of impact energy is increasingly reduced. However, this may lead to an increase in repulsive energy and a risk of causing a double or triple accident.

On the other hand, according to the present invention, for example, by increasing the shock energy absorption of the front and rear shock absorbing mechanisms, it is possible to increase the shock energy absorption rate on a highway, for example, by 140% per hour.
It can respond sufficiently effectively to speeding up vehicles in kilometers and is extremely useful.

[Brief description of the drawings]

FIG. 1 is a side view illustrating an exemplary embodiment of the present invention.

FIG. 2 is a front view showing a typical embodiment of the present invention.

FIG. 3 is a plan view showing an exemplary embodiment of the present invention.

FIG. 4 is a rear view showing an exemplary embodiment of the present invention.

FIG. 5 is an enlarged detailed view of a rectangular wavy line portion in FIG. 3;

FIG. 6 shows another embodiment of the front shock absorbing mechanism according to the present invention .
FIG.

[Description of Signs] 1 Fence 2 Support 3 Front shock absorbing mechanism 4 Rear shock absorbing mechanism 4a Ring spring 4b Cover 5 Shock absorbing mechanism fixing shaft 6 Fence fixing pipe 7 Bolt A 8 Bolt B 9 Anchor bolt 10 Bracket 11 Bolt C

Claims (2)

(57) [Claims] In a guard fence in which a long fence portion is connected to a plurality of columns in a transverse manner via a shock absorbing mechanism portion, a front portion located between the fence portion and the column as a shock absorbing mechanism portion. Along with the shock absorbing mechanism, both shock absorbing mechanisms of the rear shock absorbing mechanism located behind the pillar,
Guard fence characterized by being provided independently of each other. 2. A rear shock absorbing mechanism is in a position behind the post, claim 1 guard fence according composed is constituted by providing a tension spring function portion connected between contact and the fence part.