JP6872448B2 - Road sign pillar - Google Patents

Description

The present invention relates to a road sign pillar and prevents a vehicle from entering an oncoming lane or a roadside zone without causing great damage to the vehicle and passengers, such as on a median strip of an expressway, especially on a bridge or in a tunnel. Regarding road sign pillars that can be.

Conventionally, road sign pillars made of steel pipes, stone pillars, concrete pillars, etc. have been used. Since these have high rigidity, there is a problem that the vehicle and the occupant are seriously damaged when the vehicle collides with them.

In order to solve such a problem, a road sign pillar has been proposed that bends when a vehicle or the like collides to absorb and mitigate the impact (Patent Document 1).

On the other hand, in the median strip of an expressway, guardrails and guard wires are used to prevent vehicles from entering the oncoming lane or the roadside zone.

Japanese Unexamined Patent Publication No. 2006-070464

The road sign pillar described in Patent Document 1 states that when a vehicle collides, it can bend to alleviate the impact and stop the vehicle, but the road sign pillar can be driven at high speed to stop the collided vehicle. It cannot be said that it has sufficient rigidity. In this road sign column, the reinforcing body at the central portion is supported by a pedestal made of a synthetic resin material such as polyurethane, so that it cannot sufficiently counter the collision force of a high-speed traveling vehicle. This road sign pillar is intended to stop the small car when it comes into contact with it at a speed of 5 km / h or less.

Guardrails and guardwires have the effect of preventing vehicles from entering oncoming lanes and roadside zones in medians and the like on expressways. However, since these guardrails and guardwires are heavy in their own right, they must be supported by a large number of columns (iron columns) having sufficient thickness embedded to a sufficient depth. Therefore, it was difficult to install guardrails and guardwires on bridges and in tunnels.

Therefore, an object of the present invention is to prevent a vehicle from entering an oncoming lane or a roadside zone without causing great damage to the vehicle and passengers, such as in a median strip of an expressway, particularly on a bridge or in a tunnel. Is to provide road signposts that can.

Other problems of the present invention will be clarified by the following description.

The above problems are solved by the following inventions.

(Claim 1)
It is provided with a sign column body made of a cylindrical elastic material and filled with a foam material inside, and a pedestal on which the sign column body is erected.
A screw member protruding downward is provided at the lower part of the pedestal.
The screw member is made of a metal material and is provided between the upper joint portion, the lower joint portion screwed and fixed to the inner peripheral joint portion of the buried pipe, and the upper joint portion and the lower joint portion. An intermediate portion penetrating through a through hole provided on the bottom surface of the pedestal is integrally formed.
Inside the main body of the sign column, a cylindrical steel pipe extends upward from the pedestal.
A road sign column characterized in that the lower portion of the steel pipe is fixed to the outer periphery of the upper joint portion of the screw member.
(Claim 2)
The road sign column according to claim 1, wherein the lower portion of the steel pipe is fixed to the outer periphery of the upper joint portion of the screw member by welding.
(Claim 3)
The road sign pillar according to claim 1 or 2, wherein the steel pipe extends upward from the pedestal to an intermediate position or lower of the sign pillar body.
(Claim 4)
The road sign column according to claim 1, 2 or 3, wherein the inside of the steel pipe is filled with the foaming material.
(Claim 5)
A bottom plate made of a metal material having an insertion hole is provided between the bottom surface of the pedestal and the ground surface.
The road sign pillar according to any one of claims 1 to 4, wherein an intermediate portion of the screw member is inserted into the insertion hole of the bottom plate.

The present invention is a road capable of preventing a vehicle from entering an oncoming lane or a roadside zone without causing great damage to a vehicle or a passenger, particularly on a bridge or in a tunnel, such as a median strip of an expressway. A signpost can be provided.

Longitudinal sectional view of a road sign pillar according to an embodiment of the present invention Top view (a) and front view (b) showing the screw members and steel pipes of the road sign pillar shown in FIG. Plan view (a) and front view (b) showing the road sign pillar shown in FIG. Vertical cross-sectional view of the main part of the road sign pillar installation state shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a vertical cross-sectional view of a road sign pillar according to an embodiment of the present invention. FIG. 2 is a plan view (a) and a front view (b) showing a screw member and a steel pipe of the road sign column shown in FIG.

As shown in FIGS. 1 and 2, the road sign pillar 10 has a metal screw member 1. In this screw member 1, a lower portion is provided with a lower joint portion 1a, an upper portion is provided with an upper joint portion 1b, and an intermediate portion 1c is provided between the lower joint portion 1a and the upper joint portion 1b, and these are integrally formed. .. As will be described later, in the state of use of the road sign pillar 10, the lower joint portion 1a is supported underground.

The lower joint portion 1a of the screw member 1 is screwed and fixed to the inner peripheral joint portion 2a of the buried pipe 2. For example, a male screw is formed on the outer periphery of the lower joint portion 1a of the screw member 1, a female screw is formed on the inner peripheral joint portion 2a of the buried pipe 2, and the male screw and the female screw are screwed together to form a screw. It is screwed and fixed to the member 1 and the buried pipe 2. As will be described later, the buried pipe 2 is buried and fixed in the ground in the state of use of the road sign pillar 10, and supports the screw member 1.

The steel pipe 3 extends upward toward the pedestal 4, which will be described later. The steel pipe 3 is made of, for example, a metal material, and is a cylindrical pipe as shown in FIG. 2 (a). The material and wall thickness of the steel pipe 3 are important in defining the rigidity of the steel pipe 3. The material and wall thickness of the steel pipe 3 can be appropriately determined so as to obtain a desired rigidity that can prevent the vehicle from entering.

The lower portion of the steel pipe 3 is fixed to the outer circumference of the upper joint portion 1b of the screw member 1. As a method of fixing the upper joint portion 1b of the screw member 1 and the steel pipe 3, it is preferable to firmly fix the screw member 1 by welding. As a result, the screw member 1 and the steel pipe 3 can be formed as an integral member.

It is preferable that the upper portion of the steel pipe 3 extends to an intermediate position or lower in the height direction of the marking column main body 5, which will be described later. The length of the steel pipe 3 is preferably, for example, about 300 mm to 600 mm, which is about half the height of the marking column main body 5. In particular, when used in a place where a large vehicle is expected to collide, the length of the steel pipe 3 is preferably set to a necessary and sufficient length so as to prevent the large vehicle from entering.

The pedestal 4 is arranged so as to surround the screw member 1. The pedestal 4 is formed in a substantially disk shape from an elastic material such as polyurethane. A through hole 4a for the screw member 1 to penetrate is formed in the center of the bottom surface of the pedestal. That is, the pedestal 4 is arranged around the screw member 1 by projecting the lower joint portion 1a of the screw member 1 downward through the through hole 4a and penetrating the intermediate portion 1c. The material forming the pedestal 4 is not particularly limited.

The sign column main body 5 is formed in a cylindrical shape made of an elastic material, and a steel pipe 3 is provided inside, and is provided so as to cover the steel pipe 3. The inner diameter of the sign column body 5 is about twice the outer diameter of the steel pipe 3.

The elastic material forming the sign column body 5 is preferably an elastic resin material such as polyurethane.

The sign pillar main body 5 is erected on the pedestal 4. The lower part of the sign column main body 5 is fitted into a groove provided in the pedestal 4, and this is joined by adhesion or the like. The sign column body 5 preferably has a length (for example, 600 mm to 1200 mm) about twice that of the steel pipe 3. Therefore, the upper end of the sign column body 5 reaches about twice the height of the upper end of the steel pipe 3.

The foam 6 is filled in the sign column body 5. The foam 6 is, for example, semi-rigid polyurethane foam, but the material thereof is not limited thereto. The foam 6 is injected into the sign column body 5 from the upper end of the sign column body 5 in a liquid state, and is foamed and solidified in the sign column body 5.

When filling the foam 6 into the sign column body 5, a liquid foam material is injected into the sign column body 5 from the upper end of the sign column body 5, and the upper end of the sign column body 5 is closed by a cap 7. Then, the sign column body 5 is turned upside down, and the foamed material is solidified in a state of being brought closer to the upper end side of the sign column body 5. By solidifying the foam material in this way, the foam 6 can be filled without forming a gap on the upper end side in the marker column body 5.

The cap 7 is formed of, for example, polyethylene in a substantially disk shape, and an annular groove 7a into which the upper end portion of the marking column main body 5 is fitted is formed on the lower surface portion. The material of the cap 7 is not particularly limited.

The road sign pillar 10 may be provided with a bottom plate 8 between the bottom surface of the pedestal 4 and the ground surface. The bottom plate 8 is made of a metal material and is formed in a disk shape. The bottom plate 8 has an insertion hole 8a in which the screw member 1 is inserted in the central portion, and the intermediate portion 1c of the screw member 1 is inserted into the insertion hole 8a on the ground surface (road surface) around the screw member 1. Will be installed in. The bottom plate 8 is arranged between the ground surface (road surface) and the bottom surface of the pedestal 4.

The intermediate portion 1c of the screw member 1 and the insertion hole 8a of the bottom plate 8 may be inserted tightly. Further, the intermediate portion 1c of the screw member 1 and the bottom plate 8 may be integrally joined (for example, welded or bonded).

In recent years, the asphalt that covers the road surface has been covered with high-performance asphalt with good drainage in order to ensure visibility and runnability in rainy weather. High-performance asphalt is more brittle than conventional dense-grain type asphalt because it increases the asphalt particle size to reduce the density and allows rainwater on the road surface to soak into the ground.

When the road sign pillar 10 is installed on the road surface of such a brittle high-performance asphalt, when a force for tilting the sign pillar body 5 is applied, a force for tilting the sign pillar body 5 is applied to the buried pipe 2 supporting the screw member 1. It is propagated, the road surface around the buried pipe 2 is dug up, and there is a risk that the road sign pillar 10 will fall over. In this case, by providing the bottom plate 8, the force transmitted to the buried pipe 2 can be dispersed to the bottom plate 8. Even when installed on a high-performance asphalt road surface, a part of the force transmitted from the screw member 1 to the buried pipe 2 is distributed to the bottom plate 8, so that a part of the force that is dug up on the road surface is bottomed out. The face plate 8 receives. Since the bottom plate 8 receives the force on the entire lower surface, the force acting on the road surface is dispersed on the entire lower surface. As a result, it is possible to prevent the road sign pillar 10 from falling by digging up the road surface.

Further, since the intermediate portion 1c of the screw member 1 and the insertion hole 8a of the bottom plate 8 are closely inserted, it is possible to more reliably dig up the road surface and prevent the road sign pillar 10 from falling. Further, by integrally joining the intermediate portion 1c of the screw member 1 and the bottom plate 8, the insertion hole 8a of the intermediate portion 1c of the screw member 1 and the bottom plate 8 is more reliable than when the insertion hole 8a is tightly inserted. It is possible to prevent the road sign pillar 10 from falling by digging up the road surface.

FIG. 3 is a plan view (a) and a front view (b) showing the road sign pillar shown in FIG.

As shown in FIG. 3, a reflective sheet 9 can be attached to the outer peripheral surface of the sign column body 5. The reflective sheet 9 can be attached to one or a plurality of locations on the outer peripheral surface of the sign column main body 5. Further, the reflective sheet 9 may be attached over the entire circumference of the outer peripheral surface of the sign column main body 5, or may be attached only in a specific direction.

Instead of the reflective sheet 9, a reflective paint may be applied to the outer peripheral surface of the sign column body 5. The color of the outer peripheral surface of the sign column body 5, the reflective sheet 9 and the reflective paint is preferably gray or metallic. Conventional green and red road sign pillars are widely recognized as soft ones that have little resistance to vehicle collisions, and thus road signs that prevent vehicles from entering oncoming lanes or roadside zones. The pillar 10 is preferably gray or metallic in order to distinguish it from the conventional road sign pillar.

Further, in the road sign pillar 10, the diameter of the sign pillar main body 5 is preferably larger than the diameter of the conventional road sign pillar and is about 135 mm in order to distinguish it from the conventional road sign pillar.

FIG. 4 is a vertical cross-sectional view of a main part of the road sign pillar installed state shown in FIG.

In order to install the road sign pillar 10 on the ground surface (road surface), as shown in FIG. 4, a circular support hole 103 is bored from the ground surface 101 to the ground 102. The diameter of the support hole 103 is preferably slightly larger than the outer diameter of the buried pipe 2, and is, for example, about 60 mm to 100 mm. The support hole 103 is filled with the adhesive 104. The buried pipe 2 is embedded in the adhesive 104 in the support hole 103 to solidify the adhesive 104. The road sign pillar 10 is installed by screwing the lower joint portion 1a of the screw member 1 into the inner peripheral joint portion 2a of the buried pipe 2 fixed and buried by the adhesive 104 in the support hole 103. To. A white line 105 indicating a roadside zone may be drawn at a location on the ground surface 101 where the road sign pillar 10 is installed.

In the present embodiment, as a more preferable installation method, the inside of the support hole 103 is in a state where the buried pipe 2 is screwed into the screw member 1, that is, in a state where the assembly of the road sign pillar 10 including the buried pipe 2 is completed. The embedded pipe 2 is embedded in the adhesive 104 of the above, and the adhesive 104 is solidified.

In either case, by later removing the lower joint portion 1a of the screw member 1 from the buried pipe 2, the road sign pillar 10 can be removed from the ground surface 101 while leaving the buried pipe 2 in the support hole 103.

By arranging a plurality of the road sign pillars 10 installed in this way in the median strip of the expressway or the like, there is an effect of preventing vehicles from entering the oncoming lane or the roadside zone.

That is, in the road sign pillar 10, the screw member 1 and the steel pipe 3 are fixed with sufficient strength, and the screw member 1 is supported in the support hole 103 with sufficient strength, so that the road sign pillar 10 is attached to the sign pillar main body 5. When a traveling vehicle collides, the steel pipe 3 tries to maintain the upright state against the collision force of the vehicle, and absorbs the collision force in the process of bending deformation, crushing, or lodging.

The lodging of the steel pipe 3 is caused by bending deformation or crushing in the vicinity of the screw member 1 of the steel pipe 3. The colliding vehicle consumes kinetic energy in the process of bending, deforming, crushing, and lying down the steel pipes 3 of the plurality of road sign columns 10, and the direction of movement can be bent. Is blocked from entering.

Further, due to the elastic force of the sign column body 5 and the foam 6, the damage on the side of the traveling vehicle that collided is minimized.

When the bottom plate 8 is provided, the road surface is dug up to prevent the road sign pillar 10 from falling, and the force required for the deformation and lodging of the steel pipe 3 becomes the assumed desired force.

Further, even when the diameter of the support hole 103 is set to about 100 mm, which is larger than the conventional one, the road sign column 10 is prevented from falling due to the collapse around the support hole 103, and the force required for the deformation and lodging of the steel pipe 3 is prevented. Can be the expected desired force.

The road sign pillar 10 can be installed on a bridge or in a tunnel because the depth of the support hole 103 to be drilled for installation may be as shallow as, for example, about 60 mm to 100 mm.

As described above, the present invention prevents the vehicle from entering the oncoming lane or the roadside zone without causing great damage to the vehicle and the passenger, especially on the bridge or in the tunnel, such as the median strip of the highway. It is possible to provide a road sign pillar 10 that can be used.

1 Screw member 1a Lower joint 1b Upper joint 1c Intermediate 2 Buried pipe 2a Inner circumference joint 3 Steel pipe 4 Pedestal 4a Through hole 5 Marking column body 6 Foam 7 Cap 7a Circular groove 8 Bottom plate 8a Insertion hole 9 Reflection Sheet 10 Road sign pillar 101 Ground surface 102 Underground 103 Support hole 104 Adhesive 105 White line

Claims (5)

It is provided with a sign column body made of a cylindrical elastic material and filled with a foam material inside, and a pedestal on which the sign column body is erected.
A screw member protruding downward is provided at the lower part of the pedestal.
The screw member is made of a metal material and is provided between the upper joint portion, the lower joint portion screwed and fixed to the inner peripheral joint portion of the buried pipe, and the upper joint portion and the lower joint portion. An intermediate portion penetrating through a through hole provided on the bottom surface of the pedestal is integrally formed.
Inside the main body of the sign column, a cylindrical steel pipe extends upward from the pedestal.
A road sign column characterized in that the lower portion of the steel pipe is fixed to the outer periphery of the upper joint portion of the screw member. The road sign column according to claim 1, wherein the lower portion of the steel pipe is fixed to the outer periphery of the upper joint portion of the screw member by welding. The road sign pillar according to claim 1 or 2, wherein the steel pipe extends upward from the pedestal to an intermediate position or lower of the sign pillar body. The road sign column according to claim 1, 2 or 3, wherein the inside of the steel pipe is filled with the foaming material. A bottom plate made of a metal material having an insertion hole is provided between the bottom surface of the pedestal and the ground surface.
The road sign pillar according to any one of claims 1 to 4, wherein an intermediate portion of the screw member is inserted into the insertion hole of the bottom plate.

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