JPH0351405A - Method and device for constituting center divisional strip for facing two-lane road - Google Patents

Abstract

PURPOSE:To enhance safety by providing standing indicators of recovering resiliency at proper intervals along a center line, and also laying a buffer of low height between the standing indicators, and making the buffer absorb impact generated when a tire makes contact with it. CONSTITUTION:Standing indicators 3 are provided at proper intervals l along a center line, and also a tubular buffer 4 of length l shorter than the interval land of low height is installed between the indicators 3, 3. The indicators 3 are each formed by a hollow column made of special polyurethane rubber and are fixed to a road surface 5, and a reflective sheet 34 is stuck to each of them. Visual guidance is clearly carried out by the series of the indicators 3 and, when a tire makes contact or collides with the buffer 4, the kinetic energy is absored and dispersed by the plastic deformation of the buffer 4 so that impact on the vehicle is buffered. Thus, safety is enhanced.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a median strip for two-lane roads, particularly for two-lane expressways with two lanes on each side but with a speed limit of 70 km/h. The present invention relates to a method of configuring a median strip and an apparatus therefor.

[Prior Art] Some roads with two facing lanes are provided with a center separation 41F to prevent a running vehicle from crossing the center line and running out into the oncoming lane. Conventional median strips are made of light metal chatter bars, concrete blocks, etc., arranged in an array using anchor bolts.

However, the chatter bar becomes slippery when its surface becomes wet due to rain or snow, and is particularly dangerous if it escapes from the paved surface, making it undesirable for two-lane roads.

[Problem to be solved by the invention]

All of the conventional median strips mentioned above are made of hard materials, so when a vehicle comes into contact with or collides with them, the strong shock and vibration that occurs at that moment is transmitted to the steering wheel. The handle may be taken off. Furthermore, since conventional median strips are made of blocks as described above, there is a problem in that vehicles can easily cross over them.

-3 On the other hand, the speed limit on expressways is 80km/t {
Unless the speed limit of the two-way two-lane road connected to this expressway is increased, its value as an expressway will decline, so an expressway with two two-way lanes but with a speed limit of 70km/l has been approved.

When the speed limit is set to 70 km/h, it is desired that the median strip of a two-lane road has a function different from the conventional one. In other words, the median strip on a two-lane expressway does not make drivers feel uneasy while driving, provides clear line-of-sight guidance, and provides reliable guidance. When a vehicle contacts or collides with a median strip, it is desirable to prevent the steering wheel from being taken off by the powerful kinetic energy generated at that moment.

An object of the present invention is to provide a method and apparatus for configuring a median strip suitable for use as a median strip for a two-way two-way expressway such as the above-mentioned 70 km/IT expressway.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides upright markings having a considerable height, for example, about 8.0 ann, and having resilience elasticity, at appropriate intervals along the center line of a two-lane, two-lane road. At the same time, the kinetic energy is absorbed by plastic deformation when a vehicle tire contacts or collides between each upright sign and the upright sign.
A shock absorber with a low dispersion height of, for example, about 150 mm is laid along the center line, and the raised indicator guides the driver's line of sight and prevents the driver from receiving a shock when the vehicle's tires touch or collide. is absorbed and dispersed by the buffer.

[Effect]

The central separation A IF of the present invention is as follows: 1) As shown in h, the upright markings with a height of 11"6 are installed at appropriate intervals, so that the upright markings, j < It is possible to clearly guide the driver's line of sight by moving his body, and to provide reliable guidance without making the driver feel uneasy.

Also, when a tire touches or collides with a shock absorber installed along the center line while driving, the shock absorber is plastically deformed and generates a powerful amount of kinetic energy. By absorbing and dispersing energy, it can buffer the impact on the vehicle.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a diagram schematically showing the installation of the median strip of the present invention on the center line of two-lane expressways 1 and 2. As shown in this figure, in the present invention, flooding is carried out at appropriate regular intervals along the center line (for example, 70an to 1
An upright sign 3 is installed upright every 20 m20an), and a length fl, (for example, 50c2n~
A cylindrical buffer body 4 with a height significantly lower than the height of the upright sign 3 (for example, a diameter l5 (self)) is installed along the center line.

A specific example of the standing sign body 3 is shown in FIG. As illustrated in FIG.
1 is formed by erecting a hollow column 32 made of special polyurethane rubber that restores its original shape even when stepped on by a vehicle tire, and a pedestal 31 is fixed to the road surface 5 with bolts 33.

A retroreflective sheet 34 is bonded to the hollow column 7.

Specific examples of the buffer body 4 are shown in FIGS. 3 and 4. As shown in FIGS. 3 and 4, this buffer body is made of polyethylene resin, for example, and has a diameter of 15 an and a length a of 0.5 to 1.5 l. A cylindrical pipe 41 with a wall thickness of 2 to 3III1 is filled with or foamed with a single-cell foam 42, and is fixed to the road surface in a state where it is spread laterally along a center line.

More specifically, a patch plate 43 made of a metal plate is applied along a part of the inner surface of a cylindrical pipe 41 made of polyethylene resin, and a patch plate 44 made of rubber is applied along the outer surface. ) Sandwich the wall thickness of the hollow pipe with both backing plates 43 and 44, and
Drill holes through the backing plate 43, 44 and the pipe at two locations near both ends of the washer 4 from inside the pipe.
The bolt 46 is inserted into the hole through the bolt 46 so that the tip of the bolt 46 protrudes outward.
Screw them together. Incidentally, a retroreflective sheet 49 in the shape of an arrow, for example, is adhered to the surface of the pipe 41.

When installing on the road surface, a hole 5l is drilled in the road surface at the location where the buried leg 48 is buried, and the buried leg 48 is fixed in the hole 51 with an adhesive 52.
and the screw hole of the buried leg 48, screw the bolt 46 into the buried leg 48 and tighten it, and then insert the hollow pipe 41.
A foamed foam 42 such as polyurethane foam is filled or foamed inside. Note that FIGS. 3 and 4 show an example in which expanded foam is formed in the hollow pipe 41, but for example, a plate-shaped expanded foam rolled into a cylindrical shape is placed in the hollow pipe 4l. It can also be inserted and filled.

In addition, although the example shown uses a hollow pipe 41, it is also possible to use a sheet made of synthetic resin wrapped around a circular mold in one or two layers and the overlapping ends of the sheets wrapped by heat and welding. You can also do it.

8. As mentioned above, the present invention consists of upright signs installed at appropriate intervals and buffers installed between each upright sign. It can provide a sense of guidance, caution, etc. to the driver and contribute to safe driving.

That is, the background color of the buffer is made gray, and the retroreflective sheet 49 provided on its surface is made yellow. Since the roadway is paved with asphalt, it is black, and a gray cushioning material is placed in the center, which has the advantage that it does not give drivers a sense of resistance, and even if it gets dirty, it is not noticeable.

On the other hand, stand-up signs are prepared in at least two types, one with a background color such as green that does not irritate the eyes, and one with a background color such as red that is irritating to the eyes. The main part of the installation will be upright signs with a ground color that does not give any irritation to the eyes, but upright signs with a ground color that will irritate the eyes will be installed over a certain section.

For example, stand-up signs with a green background color are laid for 2km, then stand-up signs with a red-base color are laid for 100m, and then green-type signs are laid again for the next 2km. If you do this, the green color will give you a sense of safety as it will not irritate your eyes, but if this condition continues for too long, you will feel tired, so for the next 100 meters, you will use the red color, which will irritate your eyes and give you a sense of safety. I will make it happen.

In this way, by combining the colors of the shock absorber and the upright sign, it is possible to give an elegant feeling to the road itself and contribute to safe driving without irritating the driver's nerves.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to clearly guide the driver's line of sight while driving, and also to absorb and disperse the impact when the tires of the vehicle contact or collide with the center line. This has the effect of contributing to safe driving.

[Brief explanation of drawings]

The attached drawings show one embodiment of the present invention, and FIG. 1 is a perspective view showing an outline, FIG. 2 is a half sectional view showing a specific example of an upright sign body having restoring elasticity, and FIG. 3 is a buffer A side view with a part of the body cut away, Figure 4 is the IV of Figure 3 in the installed state.
It is an enlarged sectional view corresponding to a -rV line cross section. 1.2... Two-way two-lane road, 3... Upright sign with restoring elasticity, 31... Pedestal, 32 Hollow column, 33
... Bolt, 34... Retroreflective sheet, 4... Buffer, 41... Cylindrical pipe, 42... Foaming foam A
s. 43.44・Packing plate, 46・Bolt, 48・
...Buried leg, 49...Retroreflective sea 1-.

Claims (1)

[Scope of Claims] 1. Upright markings having restoring elasticity are installed upright at appropriate intervals along the center line, and the tires of a vehicle do not come into contact between each of the upright markings. Absorbs kinetic energy during collision through plastic deformation,
A low-height shock absorber that can be dispersed is laid along the center line, and the standing sign guides the driver's line of sight, and the shock absorber absorbs the impact when the vehicle's tires touch or collide. A method for constructing a median strip for two-lane roads, characterized by absorbing and dispersing the median strip. 2. Set up stand-up signs for line-of-sight guidance that have resilience elasticity at appropriate intervals along the center line, and place a vehicle between each stand-up sign for line-of-sight guidance and the stand-up signs for line-of-sight guidance. A median strip device for two-way two-lane roads, characterized in that a low-height buffer body that can absorb and disperse kinetic energy when tires contact or collide through plastic deformation is laid along the center line. 3. The upright elastic sign for guiding the line of sight according to claim 1 or 2, characterized in that it is constructed of an elastic hollow body that can fall down when stepped on by a vehicle tire and restore itself when a vehicle passes by. 4. Diameter approximately 15cm, length 0.5-1m, wall thickness 2-3m
3. The cushioning body according to claim 1 or 2, characterized in that a cylindrical synthetic resin pipe having an elasticity of m is filled with or foamed. 5. Apply a patch plate to the inner and outer surfaces of an elastic cylindrical synthetic resin hollow pipe, and pass a bolt through each patch plate and the wall thickness of the hollow pipe from the inside to the outside of the hollow pipe, Screw the buried leg onto the bolt,
The buried legs are buried in advance along the center line of the road surface, the bolts are tightened to the buried legs, a hollow synthetic resin pipe is laid along the lane marks on the road surface, and the hollow synthetic resin pipe is placed into the hollow synthetic resin pipe. A method for installing a cushioning body characterized by filling or forming foam with foam. 6. The background color of the buffer is gray, whereas the background color of the upright sign is either green, which does not irritate the eyes, or red, which is irritating to the eyes. At least two types of stand-up signs are prepared, and the stand-up signs with a ground color that does not irritate the eyes are installed as the main body, but the stand-up signs with a ground color that irritate the eyes are installed over a certain section. 2. The method of configuring a median strip for a two-lane road as set forth in claim 1.