JP3501374B2 - Road boundary block - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road boundary block, and more particularly to a road boundary block installed at a boundary between a roadway and a sidewalk, a median strip of a road, or the like for dividing a roadway. is there.

[0002]

2. Description of the Related Art In order to separate pedestrian roads, concrete boundary blocks for roads are lined up along the roads at the boundaries between the roads and sidewalks. This is also called a curb block, and it exists as a step between the roadway and the sidewalk. This road boundary block is generally composed of a rectangular block having a substantially rectangular parallelepiped shape, and has a height from the road surface of 20 cm to 3 cm.
It is buried so that it will be 0 cm.

Boundary blocks for roads (hereinafter referred to as "boundary blocks") are used not only on the boundaries of pedestrian roads but also on the median strips of roads, toll gates on expressways, gas stations, public parking lots, etc. It may be provided. That is, it may be installed not only as a means for protecting pedestrians but also as a means for guiding or restricting the traveling direction of the vehicle.

[0004]

However, the conventional boundary block has a rectangular parallelepiped shape, and its upper surface and the side surface on the roadway side are formed at right angles to each other. Therefore, for example, when the vehicle collides with the boundary block from an oblique direction, the tires of the front wheels are caught on the upper corners of the boundary block and easily ride up. If the vehicle crosses the boundary block, pedestrians may be damaged, leading to a serious accident. Further, even if the driver does not ride on the boundary block, the vehicle will collide with the boundary block and stop, so the impact on the vehicle and the driver will be extremely large, and there is a high possibility that the vehicle will be damaged or the driver will be injured. .

Further, in a boundary block provided in a line in the median strip, when a vehicle gets over it, there is a possibility of collision with a vehicle traveling in an oncoming lane. Therefore, it has been proposed that the height of the boundary block is made higher than that of the conventional one, or a fence is provided on the boundary block to prevent the vehicle from getting over, but according to this,
The construction cost becomes extremely high, and the vehicle body collides with the wall surface, so that the damage caused by the collision becomes more serious.

It has been confirmed that when a studless tire is worn as a tire of a vehicle, the user can get on a boundary block very easily even when the traveling speed of the vehicle is relatively low.

Further, at a toll booth on a highway, a gas station, etc., since the vehicle travels at a relatively low speed, the tire hardly rides on the boundary block. , A part of the tire wheel or car body could come into contact with the concrete boundary block and be damaged.

By the way, as a boundary block, a trapezoidal block in which the side surface on the side of the road is inclined is also known.
According to this boundary block, the impact due to the collision can be alleviated, but since the tire rolls along the slope, it becomes easier to get on the boundary block and the safety of pedestrians and the like can be secured. become unable. That is, as the slope of the slope is gentler, the vehicle is easier to ride on the vehicle, while the steeper of the slope is, the greater the impact is. Therefore, these two problems cannot be solved at the same time.

Therefore, in view of the above situation, the present invention provides a road boundary block for a vehicle, which prevents the vehicle from riding up, reduces the impact on the vehicle and the driver, and prevents the vehicle from being damaged due to contact. The challenge is to provide.

[0010]

A boundary block for a road according to the invention of claim 1 is arranged along a roadway and protrudes upward from a road surface so that a height of an upper surface with respect to the road surface is high.
Is set to a predetermined height between 20 cm to 40 cm, a road boundary block of inducing or regulating the traveling direction of the vehicle traveling the roadway, on the sides of the roadway side, the
A surface for sliding the tires of the vehicle along the roadway.
Friction reduction that is smooth and reduces friction against the tire
It has an inclined surface which is coated with an agent and which is curved in a substantially arc shape, and the inclined surface has an inclination that gradually increases, so that the tire of the vehicle that collides from an oblique direction can move upward from a state in which the tire can roll upward. The surface slips without rolling
The state is changed so that the kana slope is slid along the road.

Further, the road boundary block according to the invention of claim 2 is arranged along the roadway and protrudes upward from the road surface, and the height of the upper surface with respect to the road surface is 20 cm.
A road boundary block, which is set to a predetermined height between 40 cm and 40 cm and guides or regulates the traveling direction of a vehicle traveling on the road .
Smooth surface so that the ear slides along the road
A friction-reducing agent that reduces the friction on the tire.
A tilted surface in which the horizontal component of the vertical drag force increases toward the upper side, and the tilted surface is in a state in which the tire of the vehicle colliding from an oblique direction can roll upward due to the gradually increasing tilt. To a state in which the surface is slid along the roadway without rolling upward, on the inclined surface having a smooth surface .

[0012] Here, the "roadway" is a passage through which a vehicle passes, not to mention general roads, toll gates on expressways, parking lots,
Alternatively, the road surface at a gas station or the like is also included. The “vehicle” can include not only a passenger vehicle but also a transportation vehicle, a work vehicle, a motorcycle, a bicycle, or the like.

Therefore, according to the road boundary block of the first or second aspect of the invention, since the inclined surface is formed on the side surface on the side of the road, the tire of the vehicle collides with the road boundary block from an oblique direction. Then, the tire acts so as to roll along the inclined surface. That is, the tire tries to ride up along the slope. However, since the inclined surface is curved in a substantially arc shape (or the horizontal component of vertical reaction force is formed so as to increase toward the upper side), the inclination gradually increases with respect to the rolling direction of the tire. . That is, the surface in contact with the tire gradually changes from a substantially horizontal surface to a substantially vertical surface. For this reason, the tire tends to roll upward along the inclined surface, but the horizontal component of the vertical reaction force (the force that is repelled toward the roadway side) gradually increases, and the force to move away from the inclined surface increases. Along with this, the vertical component of the vertical reaction force gradually decreases, and since the vehicle's own weight is applied in the direction opposite to the rolling direction (that is, the downward direction), the tire does not roll upward and the side surface of the road boundary block Slide along.

At this time, since the vehicle that collides with the road boundary block is gradually braked, the impact on the vehicle and the driver is extremely small.

On the other hand, when the vehicle travels along the road boundary block, even if the vehicle approaches the road boundary block, the inclined surface is formed. A gap is always formed between them. That is, the wheel and the vehicle body do not contact the side surface of the road boundary block.

A road boundary block according to a third aspect of the present invention is the road boundary block according to the first or second aspect, in which a corner between the upper surface and the side surface is chamfered. . Here, "chamfering" is to remove a corner, and it is particularly preferable to add a radius.

Therefore, according to the road boundary block of the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, since the corner portion between the upper surface and the side surface is chamfered, the tire When the vehicle rolls (slides) on the inclined surface, even if it comes into contact with a corner, it does not get caught on the tire, so that the riding of the tire is suppressed.

A boundary block for a road according to a fourth aspect of the present invention is the boundary block for a road according to any one of the first to third aspects, in which the surface of the inclined surface is smoother than other portions. It is formed in.

Here, "smooth" means a state in which friction with the tire is small. The method of smoothing is not particularly limited, but the surface of the inclined surface is coated with a friction reducing agent such as silicon or fluororesin, a sliding member such as a stainless plate is attached, or This can be achieved by increasing the proportion of cement. Further, the surface of the inclined surface may be polished.

Therefore, according to the boundary block for a road of the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, the surface of the inclined surface is formed more smoothly. Friction with the tire is extremely small. That is, the tire is in a state of easily sliding.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION A road boundary block 1 according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is an explanatory view showing a schematic structure of a road in which a road boundary block 1 is arranged, FIG. 2 is a perspective view showing a structure of the road boundary block 1, and FIGS. 3 and 4 are road boundary blocks. It is explanatory drawing for demonstrating the effect | action of 1.

As shown in FIG. 1, the road boundary block 1 of the present embodiment has a boundary between a road 2 and a sidewalk 3 and a road 2.
And the other road 4 (for example, an oncoming lane). Note that the road boundary block 1 between the road 2 and the sidewalk 3 will be referred to as a first block 5, and the road boundary block 1 between the roads 2 and 4 will be referred to as a second block 6, which will be described in detail below.

As shown in FIG. 2A, the first block 5 is a block that is horizontally long in the row direction and is made of concrete. The upper surface 8, the bottom surface 9 and the side surface 10 on the sidewalk 3 side of the first block 5 all have a substantially flat shape, and when arranged side by side on the road surface, the upper surface 8 is substantially horizontal with respect to the road surface. Is almost perpendicular to the road surface.

On the other hand, the side surface 11 on the side of the road 2 is composed of an inclined surface 12 curved in a substantially arc shape. In other words, it is composed of the inclined surface 12 in which the horizontal component of the vertical force increases toward the upper side. In other words, the side surface 11 is formed so as to incline downward toward the roadway 2 and the inclination degree gradually decreases toward the roadway 2. The radius of the inclined surface 12 is not particularly limited, but in the present embodiment, it is set to be approximately equal to the diameter of the tire in a general vehicle. Further, the height of the upper surface 8 with respect to the road surface is not particularly limited, but in the present embodiment, it is set to a predetermined height between 20 cm and 40 cm.

A chamfered portion 13 whose corners are chamfered is formed between the upper surface 8 and the side surface 11 (inclined surface 12) on the road side. In particular, the chamfered portion 13 is rounded. Further, the surfaces of the side surface 11 and the chamfered portion 13 are polished so as to be formed more smoothly than other portions.

On the other hand, as shown in FIG. 2B, the second block 6 has a shape in which the two first blocks 5 are joined at the side surface 10. That is, it has an inclined surface 12 for one of the roads 2 and an inclined surface 12 for the other of the roads 4, and the basic configuration is the same as that of the first block 5. Therefore, detailed description of the configuration and function of the second block 6 is omitted.

Next, the operation of the first block 5 will be described with reference to FIGS. 3 and 4. FIG. 3A shows the first block 5
Is viewed from the front side, and FIG. 3B illustrates the first block 5 viewed from above.

When the vehicle running on the road 2 faces the sidewalk 3, the tire 14 (left front wheel) of the vehicle is moved to the first block 5.
There may be a collision from an oblique direction. Note that, in reality, the phenomenon of “abutting” does not occur, but here, for the sake of convenience, “abutting” is referred to as a collision. In FIG. 3, the tire 14 before the collision is shown by a solid line, and the tire 14 after the collision is shown by a chain double-dashed line. When the tire 14 collides with the first block 5, the tire 14 rolls along the inclined surface 12 formed on the side surface 11. That is, it tries to ride on the upper surface 8 of the first block 5 along the inclined surface 12. However, since the inclined surface 12 is curved in a substantially arc shape, the degree of inclination gradually increases with respect to the rolling direction. For this reason,
As shown in FIG. 4, when the vertical force changes from N1 to N2, the horizontal component changes gradually from X1 to X2, and the force to move away from the inclined surface 12 increases. Also, along with this, the vertical force is N1 to N.
When it changes to 2, the vertical component changes gradually from Y1 to Y2, and the own weight of the vehicle is applied in the direction opposite to the rolling direction (that is, the downward direction), so that the tire 14 rolls upward. It is difficult to move. In particular, the inclined surface 12
A chamfer 13 is formed at the upper end of the
Is polished, the surface of the inclined surface 12 and the tire 14
The friction with the tire becomes extremely small, and the tire 14 slides in the traveling direction S without riding on the upper surface 8 of the first block 5.

As described above, according to the first block 5 described above, the tire 14 is formed by the inclined surface 12 curved in an arc shape.
Can be prevented from riding. Therefore, the vehicle is prevented from jumping into the sidewalk 3, and the safety of pedestrians and the like can be secured. Further, since the vehicle that collides with the first block 5 is slid along the side surface 11 on the side of the roadway, it is possible to reduce the impact on the vehicle, the driver, and the like, and to prevent damage to the vehicle and injury to the driver and the like. Can be kept to a minimum.
Moreover, since it has an extremely simple configuration, it can be manufactured without increasing the cost so much as compared with the conventional boundary block.

Further, according to the first block 5 described above, when the vehicle travels along the side surface 11, even if the tire 14 approaches the side surface 11, the inclined surface 12 of the first block 5 and the vehicle body are not affected. A gap is always formed between them. That is, the vehicle body or the like does not contact the side surface of the first block 5, and the vehicle body or the like is reliably prevented from being damaged.

Further, according to the above first block 5,
Since the inclined surface 12 is formed at the edge of the road 2, the snow removal work of the snow removal vehicle during snow accumulation becomes easy. Further, since the width of the upper surface 8 is narrower than that of the conventional boundary block,
The substantial road width of the road 2 is relatively widened, and the traveling of the vehicle is facilitated. Further, for a bicycle passing near the first block 5, the pedal of the bicycle is less likely to come into contact with the first block 5, and therefore the fall due to the pedal being hooked on the first block 5 is prevented. That is, it is possible to improve the safety for the bicycle user.

On the other hand, according to the second block 6 provided in a line between the roads 2 and 4, in addition to the above effects, a frontal collision between vehicles can be avoided and a major accident can be prevented. Also,
Since it is not necessary to provide a fence or the like on the second block 6, the construction can be performed at low cost and the appearance can be improved.

By the way, in the above-mentioned embodiment, the boundary block 1 is arranged at the boundary of the pedestrian road and the median strip in the roadway. It may be arranged in a row. According to this, it is possible to prevent the vehicle from crashing due to jumping out from the edge of the road. Further, it can be installed at a tollgate of an expressway, an entrance / exit of a public parking lot, a refueling place of a gas station, or the like in order to regulate or guide the traveling direction of the vehicle. In this case, one first block 5 is not limited to one in which a plurality of first blocks 5 are arranged in a row.
You may make it arrange | position only. Further, the entire shape is not limited to the horizontally long shape, and the upper surface may have a square shape, for example. If the area of the upper surface is increased, the first block 5 can be used as a table on which equipment such as an oil tank is placed.

Next, another embodiment (third block 16 to seventh block 20) of the boundary block 1 will be described with reference to FIG. The same components as those in the first block 5 of the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

The third block 16 shown in FIG. 5 (a) has a slidable member 22 mounted on the surface of the inclined surface 12. The sliding member 22 may be, for example, a tile or a stainless plate. Instead of the sliding member 22, a friction reducing agent such as silicon or fluororesin, or paint (for example, white line paint) may be coated on the surface of the inclined surface 12. As described above, by providing the sliding member 22 and the like, the surface of the inclined surface 12 becomes smoother, and the friction against the tire 14 becomes smaller. Therefore, the rolling of the tire 14 on the inclined surface 12 can be effectively suppressed, and the height of the third block 16 can be reduced.

The fourth block 17 shown in FIG. 5 (b) is one in which the lower end portion of the inclined surface 12 is notched and the vertical surface 23 is formed on the lower portion of the side surface 11. According to this, since it is possible to collide with the vertical surface 23 before contacting the inclined surface 12, it is possible to reduce the momentum of the tire 14 to some extent. Therefore, the rolling of the tires 14 is suppressed, and the sliding distance until the vehicle stops can be shortened. It should be noted that, as shown in FIG. 5C, even if the groove 24 is formed between the fifth block 18 (the same configuration as the first block 5) and the roadway 2, it is the same as the fourth block 17. It is possible to obtain the action and effect.

The sixth block 19 shown in FIG.
Has two inclined surfaces curved in an arc shape.
That is, the upper inclined surface 25 having a predetermined radius is formed on the upper portion of the sixth block 19, and the upper inclined surface 25 is formed on the lower portion.
A lower inclined surface 26 having a smaller radius than that is formed.
According to this, the inclination angle of the lower inclined surface 26 can be increased and the rolling of the tire 14 upward can be prevented.
Can be held at a position relatively distant from. Therefore, even a tire having a large diameter such as a tire of a large vehicle can be slid on the lower inclined surface 26 before coming into contact with the chamfered portion 13.

The seventh block 20 shown in FIG. 5 (e) has three inclined surfaces, that is, an upper inclined surface 27, a central inclined surface 28, and a lower inclined surface 29 from the upper side, and between the inclined surfaces. There is a stair-like step 30 so that the height is higher toward the top.
Is provided. According to this, since the step 30 becomes a resistance against the tire 14 which is about to roll upward,
Rolling of the tire 14 can be effectively suppressed. In addition, step 3
Since 0 does not resist the tire 14 falling downward, it can be slid smoothly.

The present invention has been described above with reference to a plurality of preferred embodiments, but the present invention is not limited to these embodiments, and as shown below, is within the scope of the present invention. In, various improvements and design changes are possible.

In the above embodiment, the concrete road boundary block 1 is shown, but the material is not particularly limited, and may be made of wood, resin or metal, for example.

In the above-described embodiment, the road boundary block 1 in which the row-arranged direction (the traveling direction of the vehicle) on the side surface 11 on the side of the roadway is linear is shown. Alternatively, the direction in which the side surfaces 11 are arranged may be formed in a curved shape.

Even when the side surfaces 11 are arranged in a line on the straight road 2, the side 11 may be formed so as to be slightly curved toward the road 2. According to this, when the vehicle slides along the side surface 11, it can be guided so as to be returned to the roadway 2 side.

Further, in the above embodiment, the surface of the inclined surface 12 is formed to be smoother than other portions, but the entire surface of the road boundary block 1 may be formed to be smooth. The entire surface can be smoothed by adding powdery resin or metal to concrete, for example. In particular, if the waste such as an empty can of beverage or a PET bottle is crushed and used as the powder, it is possible to suppress an increase in manufacturing cost and to effectively use the waste.

[0044]

As described above, claim 1 or claim 2 is provided.
The road boundary block of the invention of claim 1 can prevent the tire from getting over due to the curved inclined surface. Therefore, for example, when this block is placed between pedestrian roads, accidents involving pedestrians and the like are prevented, and when this block is placed in the median strip of the roadway, frontal collision between vehicles occurs. To be prevented. In other words, the damage caused by the accident can be minimized and the safety of people can be greatly improved. Further, since the vehicle that has collided with the road boundary block is slid along the side surface, it is possible to reduce the impact on the vehicle and the driver.
Moreover, it is possible to prevent the vehicle body or the like from being damaged by the vehicle traveling along the road boundary block.

The boundary block for road according to the invention of claim 3 is
In addition to the effect of the invention of claim 1 or claim 2, chamfering eliminates the possibility of catching on a corner portion, and it is possible to reliably prevent a tire from crossing over.

The boundary block for road according to the invention of claim 4 is
In addition to the effect of any one of the first to third aspects of the present invention, friction with the tire is further reduced, and upward rolling of the inclined surface can be minimized. Therefore, it is possible to reduce the height of the road boundary block.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a road on which a road boundary block according to an embodiment of the present invention is arranged.

FIG. 2 is a perspective view showing a configuration of a road boundary block.

FIG. 3 is an explanatory diagram for explaining an action of a road boundary block.

FIG. 4 is an explanatory diagram for explaining the operation of a road boundary block.

FIG. 5 is a front view showing a configuration of a road boundary block which is another embodiment.

[Explanation of symbols]

Boundary block for 1 road 2,4 road 5 First block (boundary block for road) 6 Second block (boundary block for road) 8 upper surface 11 Side of the road 12 slope 13 Chamfer 16 Third block (boundary block for road) 17 Fourth block (boundary block for road) 18 Fifth block (boundary block for road) 19th block (boundary block for road) 20 7th block (boundary block for road)

Claims (4)

(57) [Claims] 1. The vehicle is arranged along a road and projects upward from the road surface, and the height of the upper surface with respect to the road surface is 20 cm.
A road boundary block which is set to a predetermined height between 40 cm and guides or regulates a traveling direction of a vehicle traveling on the road, and a tire of the vehicle on the side surface on the road side. Along
The surface is smooth so that
A friction-reducing agent that reduces friction is coated, and it has an inclined surface that is curved in a substantially arc shape, and the inclined surface can roll up the tires of the vehicle that collide from an oblique direction due to the gradually increasing inclination. The smooth surface without rolling from above.
A boundary block for a road, wherein the boundary block is changed to a state in which it slides on an inclined surface along the roadway. 2. The height of the upper surface with respect to the road surface is 20 cm , which is arranged along the road and projects upward from the road surface.
A road boundary block which is set to a predetermined height between 40 cm and guides or regulates a traveling direction of a vehicle traveling on the road, and a tire of the vehicle on the side surface on the road side. Along
The surface is smooth so that
A friction-reducing agent that reduces friction is coated, and the inclined surface has an inclined surface in which the horizontal component of the vertical drag increases toward the upper side. , The surface is smooth from the state of being able to roll upward without rolling upward.
A boundary block for road, wherein the boundary block is changed into a state of sliding on the inclined surface along the road. 3. The road boundary block according to claim 1, wherein a corner portion between the upper surface and the side surface is chamfered. 4. The road boundary block according to claim 1, wherein the surface of the inclined surface is formed so as to be smoother than other portions.