JP3024381U - Curb - Google Patents

Abstract

(57) [Abstract] [Purpose] Regarding the curb of the road, which is the boundary between the sidewalk / separation zone and the road, especially in the curb having a cushioning function, the elastic material does not peel off and the impact absorption effect is high and the reliability is high. The purpose is to realize a high and safe curb. A curbstone characterized in that a buffer body (3) made of a soft elastic material is fixed to an outer peripheral portion of a core body (2) made of a hard elastic material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a curb of a road which is a boundary between a sidewalk / separator and a road, and more particularly to a curb having a cushioning function.

[0002]

[Prior art]

 Road curbs are provided to ensure safe passage of sidewalks and lanes, ensure the separation of sidewalks and lanes from roadways, and clearly define their boundaries. It is provided as follows. Normally, sidewalks and lanes are set one step higher than the roadway, but if a step cannot be provided, install them so that the curbstones project at the boundary surface, or guard fences, etc. Is provided.

A conventional curb has a concrete block material arranged at the boundary between a sidewalk and a roadway. The height of this curb is about 20 cm, which is too high for the wheels of an ordinary car to ride over, so the car cannot enter the sidewalk.

However, as seen in traffic accidents and the like, there are cases in which an automobile climbs onto a sidewalk, a lane, or the like and collides with a utility pole or a house. In these cases, the tire collides with the curb at a severe speed, and the rebound resilience of the tire causes the car to bounce upward and plunge into the utility pole or house as it is.

Therefore, in order to reduce the damage caused by these collision accidents, the repulsive force of the tire due to the collision must be reduced. Reducing the elasticity of the tire itself will affect the running performance of the car. Therefore, it is necessary for the curb to have a shock absorbing function.

There is also a device (Jitsukaihei 2-54805) in which a curb has a shock absorbing function. In this device, as shown in FIG. 5, a rubber-like elastic layer 21 is provided on the surface of a curb 20. That is, the rubber-like elastic material 21 is fixed to the upper surface of the curb base 22 and the surface of the side surface of the road 23 with an adhesive 25 or the like.

As described above, when the elastic layer 21 is provided on the outer surface of the curb 20, the elastic layer 21 absorbs the impact, so that, for example, even when the vehicle collides with the curb 20 at an extremely high speed, the impact is not generated. Since the force is absorbed, the repulsive force of the tire due to the collision becomes small, and the car does not jump up. Therefore, the car does not rush into the sidewalk 24 and hits the curb 20 and stops. Therefore, since the tire does not get over the curb 20 and only the impact of the tire colliding with the curb 20 does not damage the electric pole or the house, and the collided object directly collides with the vehicle, the passenger It is possible to prevent serious accidents such as fatal accidents.

[0008]

[Problems to be solved by the device]

 Thus, fixing an effective elastic material to the curb 20 exerts an excellent shock absorbing function. However, an elastic material such as a rubber material does not have good adhesiveness to the concrete block that is the curb base 22. In other words, since the elastic material and concrete are completely different in material and hardness, the adhesive strength of the adhesive material decreases due to a large difference in elongation rate due to temperature changes, water permeability and surface condition, etc. I can't stand it. For this reason, the elastic layer 21 is often peeled off from the curb base 22, which requires frequent repairs. Although there are rubbers with high weather resistance, adhesives with good adhesion between concrete and rubber have not yet been developed.

The present invention has been made in view of the above conventional problems, and in a curb having a shock absorbing effect, a curb having a high shock absorbing effect and high reliability without peeling of an elastic material is provided. It was done to realize it.

[0010]

[Means for Solving the Problems]

 As shown in FIG. 1, the first aspect of the present invention is a curb in which a buffer body 3 made of a soft elastic material is fixed to an outer peripheral portion of a core body 2 made of a hard elastic material. For example, as shown in FIG. 1, a core body 2 of a curb 1 is made of a hard rubber material, and an oblique cut is made from the upper surface of the curb 1 to a side surface of a road 4, and a soft rubber having a triangular prism shape is formed in the cut portion. It is also possible to secure the buffer 3 made of a material with an adhesive 12. The core body 2 is fixed to the roadbed 6 with a dry cement (mixture of sand and cement) 7.

The core body 2 may be made of any hard elastic material, for example, ethylene-propylene rubber (EPDM) used for automobile bumpers. Alternatively, a hard resin material or the like may be used. The cushioning material 3 may be any soft elastic material, for example, butyl rubber (IIR), which is used in tire tubes or the like and has a small impact resilience and an excellent shock absorption. The buffer body 3 may be fixed to the core body 2 by placing the casting mold of the buffer body 3 on the core body 2 and casting the thermoplastic body (TPE) or the like. Also, as these elastic materials, regenerated rubber regenerated from waste rubber materials such as old tires may be used.

A second aspect of the present invention is, as illustrated in FIGS. 2 (1) and 2 (2), curb stones in which step-like protrusions 2c and 2d are provided on side surfaces 2a and 2b of the hard core body 2 on the road surface side. Is. The step-like projections 2c and 2d may be any as long as they are provided so as to prevent the curb 1 from floating upward. For example, as shown in FIG. 2 (1), the hard core of the curb 1 is shown. A stepped projection 2c may be formed on the lower portion of the side surface 2a of the body 2 on the side of the roadway 4, and an upper corner of the side surface 2b of the hard core 2 on the sidewalk 5 side may be cut out in a stepwise manner to form a projection 2d. good. Each of the step-like protrusions 2c and 2d may be provided in a plurality of steps, and the horizontal plane of the step portion may be higher on the outer side and may be wedge-shaped with an acute angle.

A third aspect of the present invention is, as illustrated in FIG. 4 (1), a curb in which the side surfaces 2a and 2b of the hard core body 2 are formed in an inclined shape, and the lower side is widened. For example, as shown in the figure, the sidewalk side surface 2a and the roadway side surface 2b may be formed to have a trapezoidal cross section. Further, only the lower end may be tapered in a skirt shape.

A fourth aspect of the present invention is a curb having a dovetail groove 8 formed on the bottom surface of the hard core body 2 as illustrated in FIG. 4 (2). The dovetail groove 8 may be any as long as the groove is formed so that when the dried mortar 7 enters and is solidified, the groove is formed. The dovetail groove 8 may be provided in the longitudinal direction of the curb 1 in several rows in a rail shape.

[0015]

[Action]

 When the cushioning body 3 made of the soft elastic material is fixed to the outer peripheral portion of the core body 2 made of the hard elastic material as in claim 1, the cushioning body 3 is shocked against the impact from the outside. Is sufficiently absorbed, and the buffer body 3 is not peeled off from the core body 2 of the curb stone 1. Since the core body 2 and the buffer body 3 have different hardnesses but are made of the same elastic material, the core body 2 and the buffer body 3 have very good adhesion, so that they can be easily bonded and can be easily and surely fixed by the adhesive agent 12 or the like. Further, also in the casting, since the adhesiveness is also good, it can be easily integrated and there is no fear of peeling.

Further, since the core body 2 of the curbstone 1 is hard and retains sufficient strength, there is no problem such as deformation of the core body 2 when paving the road 4 or the sidewalk 5. In addition, compared with the concrete block, it is much lighter in weight, so installation work is easier, and a lifting device such as a crane is not required, and installation work can be performed safely.

When the step-like projections 2c and 2d are provided on the side surfaces 2a and 2b on the road surface side of the hard core body 2 as in claim 2, the step-like projections 2c and 2d are provided during road surface construction. It will be buried in the pavement. Therefore, the step-like projections 2c and 2d bite into the pavement in a wedge shape, and the curb is firmly fixed to the road surface (the road 4 and the sidewalk 5).

When the tire of the automobile tries to ride on the buffer 3 of the curb 1, the curb 1 is pushed down to the side of the road 4, and the curb 1 and the sidewalk 5 shown in FIG. However, the formation of the stepped protrusions 2c and 2d does not cause the joint surface 2e to be opened, and the curb 1 does not open on the road surface (road 4, It is firmly fixed to the sidewalk 5). In addition, it is possible to prevent upward lifting.

When the side surfaces 2a, 2b of the hard core body 2 are formed in an inclined shape and the lower side is widened, the curb 1 and the road surface (roadway 4, sidewalk 5) are separated from each other. It is firmly connected. That is, the side face and the lower side of the curb 1 are embedded in the pavement of the road 4 and the sidewalk 5, but since the joint side faces 2a and 2b are inclined in a taper shape, the curb 1 cannot move upward. Absent. For this reason, the curb 1 does not float up or fall down even when an impact is applied from the outside, so that the curb 1 is firmly fixed to the road surface (road 4, sidewalk 5). Also, when this curb is manufactured by casting, the side surface is tapered, so it can be easily removed from the mold, making it easy to manufacture.

When the dovetail groove 8 is formed on the bottom surface of the hard core body 2 as in claim 4, the curb 1 is firmly fixed to the road surface (roadway 4, sidewalk 5), Curb 1 will no longer rise due to external impact.

When the curb 1 is applied to the road surface, the curb 1 is first temporarily fixed, and then the road surface (roadway 4, sidewalk 5) is paved. The curb 1 is temporarily fixed by laying dry mortar (mixture of sand and cement) 7 on the surface where the curb 1 is installed, and arranging the curb 1 blocked and aligning it with the adjacent curb 1. After installation, the dry mortar 7 absorbs the surrounding moisture and solidifies.

When the dovetail groove 8 is provided on the bottom surface of the curb stone 1, when the curbstone 1 is temporarily fixed, the dry mortar 7 enters and solidifies in the die groove 8. When the dry mortar 7 that has entered the dovetail groove 8 in the shape of an inverted triangle solidifies, the curb 1 and the mortar 7 of the base mesh with each other, so that a strong joint can be formed on the joint surface with weak adhesion. Therefore, it is possible to reliably prevent the curbstone 1 from being lifted up by an external impact such as a collision.

[0023]

【Example】

 Next, practical examples of how the curb according to the present invention is embodied will be described. FIG. 1 is a perspective view showing an embodiment of a curb which serves as a boundary between a sidewalk and a roadway according to the present invention. In the figure, two curb blocks are shown, and a right side surface shows a vertical section.

The curb 1 is installed at the boundary between the road 4 and the sidewalk 5, and the sidewalk 5 is about 20 cm higher than the road 4. The upper surface of the curb 1 is the same as the upper surface of the sidewalk 5, and forms a step with the road 4. The curb 1 is first temporarily fixed with dry mortar (mixture of sand and cement) 7, and then the road 4 and the sidewalk 5 are paved so that the curb 1 is embedded.

The curb 1 is composed of a core body 2 made of a hard rubber material and a buffer body 3 made of a soft rubber material. The core body 2 is obliquely cut from the vicinity of a corner on the side of the sidewalk 5 on the upper surface to the lower part of the side surface of the road 4, and a triangular pillar-shaped buffer body 3 is fixed to the cutout portion. The buffer body 3 is fixed to the core body 2 with a rubber adhesive 12.

In addition, the curb 1 is made into a block with a length of about 1 meter and manufactured at a factory, and each of them is bonded with an adhesive 12 on site. After arranging this curb block on site, the road 4 and sidewalk 5 will be paved. Since the joint portion between the road 4 and the sidewalk 5 is the hard core body 2, the strength by compression is sufficiently secured and there is no fear of deformation.

Since the surface on the side of the road 4 is the buffer 3, the repulsive force of the tire of the automobile can be reduced and the impact can be effectively absorbed even if the tire of the automobile hits. Even if the vehicle collides with the curb 1 at a high speed, the impact force is absorbed, and the repulsive force of the tire does not cause the vehicle to jump upward, so that the curb 1 is often jumped over. Also, even if you jump in, the momentum is considerably reduced, so you can avoid a serious accident without hitting a utility pole or a house with the same impact.

As shown in FIG. 1, FIG. 2 (1), and FIG. 3 (1), if the upper surface of the core body 2 is formed obliquely and provided so as to be covered with the buffer body 3, the sidewalk 5, etc. When crossing a car by car, it is possible to ride on the sidewalk 5 as it is by slowly moving, without providing a slope for overcoming the step. A collision at high speed has the effect of absorbing shock, and at extremely low speeds, it is possible to ride up with flexibility.

Further, unlike concrete, it has good workability and adhesiveness, facilitates attachment of a reflection plate, etc., and can also use color materials, so that safety indications can be easily and freely made.

In addition, since rubber waste such as old tires, which has been greatly treated in recent years, can be reused, it has an effect of promoting recycling.

FIG. 2 is a sectional view showing another embodiment of the curb according to the present invention, in which (1) the sidewalk 5 similar to that of FIG. 1 is provided at a boundary portion having a step higher than the road 4. Another example of the curb is a stepped projection 2c, 2d provided on the side surface 2a, 2b on the road surface side (roadway 4, sidewalk 5). The step-like protrusions 2c and 2d are provided with an acute-angled step-like protrusion 2c on the side surface 2a on the side of the road 4, and an acute corner is cut off at an upper corner of the side surface 2b on the sidewalk 5 side. The projection 2d is formed.

Since these step-like projections (2c, 2d) are buried in the road surface by the road surface pavement, the stepped projections (2c, 2d) have a wedge-like state in the pavement. Therefore, the step-like protrusions 2c and 2d exert a wedge effect and firmly engage with the road surface, so that the curb 1 is firmly fixed to the road surface (the road 4 and the sidewalk 5) and the curb 1 floats from the road surface. Also, since the joint surface 2e with the road surface is not peeled off, it is possible to firmly receive a collision such as a tire of an automobile and sufficiently absorb the shock.

FIG. 2B is a sectional view showing an embodiment in which the height of the sidewalk and the height of the roadway are the same. The curb 1 has a core body 2 made of a hard rubber material, and a buffer body 3 made of a soft rubber material fixed to the core body 2 with an adhesive 12 so as to cover the upper portion thereof, and has a trapezoidal cross-sectional shape. The bottom surface is temporarily fixed with dry mortar 7, and the lower part is buried in the road pavement. Stepped protrusions 2c and 2d are formed on side surfaces 2a and 2b on the side of the road 4 and the side of the sidewalk 5 which are embedded in the road surface of the curb 1.

The curb 1 has a shock absorbing effect against the impact from the side of the road 4 and the impact from the side of the sidewalk 5 because all the exposed portion on the road surface is covered with the buffer 3. be able to. That is, in addition to the impact of the tires of the automobile from the side of the road 4 and the like, it is possible to prevent pedestrians from the side of the side 5 and injuries due to the fall of the bicycle, and the like, which also has the effect of protecting the pedestrian.

FIG. 3 is a cross-sectional view showing another embodiment of the curb according to the present invention. (1) is a L-shaped side groove 9 having a shock absorbing function, which is made of a hard rubber material. The core body 2 of the L-shaped side groove 9 is manufactured, and the cushioning body 3 made of a soft rubber material is fixed to the upper part of the side surface of the road 4 with the adhesive 12.

(2) is an example of a curb when there is a step at the boundary between the median strip 10 and the road 4, and the upper part of the curb 1 on the side of the road 4 is projected so that the car can get over the curb 1. It's getting harder. In this curbstone 1, the protruding portion 11 serves as a buffer body 3 made of a soft rubber material, and is fixed to a core body 2 made of an L-shaped hard rubber material with an adhesive 12, and the bottom surface of the core body 2 is , Fixed with dry cement 7. In addition, the upper edge corner of the side surface on the side of the sidewalk 5 is cut out to form a sharp step-like projection 2d.

When the vehicle gets over the median strip 10, there is a risk of jumping out into the opposite lane and causing a serious accident, but since the protrusion 11 is the buffer 3 made of a soft elastic material, a shock is applied. It is well absorbed and the tire's repulsive force is almost eliminated, so the car does not jump up. For this reason, it is possible to prevent jumping over the median strip 10 and to reduce injury due to impact.

FIG. 4 is a cross-sectional view showing another embodiment of the curb according to the present invention. (1) is a core for increasing the fixing strength of the curb 1 to the road surface (roadway 4, sidewalk 5). The material 2 is provided so that the side surfaces 2a and 2b thereof are inclined surfaces. That is, the vertical cross section of the curb 1 is formed in a trapezoidal shape, and it is possible to prevent the curb 1 from being pushed up by an external force. The bottom surface of the core body 2 is fixed to the roadbed 6 with dry cement 7.

When an automobile collides with the curb 1, the tire of the automobile hits the cushion 3 of the curb 1. The shock absorber 3 absorbs the impact of the tire and dents, but the impact at this time pushes the curb 1 strongly toward the sidewalk 5 and the curb 1 tries to float up. However, the lower side of the curb 1 is widened, and the core body 2 is a hard elastic material, and since it is firmly joined like a wedge, it does not float up. The inclination angle of the side surfaces 2a, 2b of the core material 2 may be slight, and it is sufficient if the inclination angle is 3 degrees or more with respect to the perpendicular.

In addition, FIG. 4 (2) shows that step-like protrusions 2c and 2d are formed on the side surface of the curb 1 in order to further increase the fixing strength of the curb 1 to the road surface (the road 4 and the sidewalk 5). The dovetail groove 8 is formed on the bottom surface of the curb stone 1.

The side surface 2a of the core material 2 joined to the surface layer portion 4a of the paved road surface on the side of the roadway 4 is formed in a stepped shape, a stepped projection 2c is formed, and a corner portion on the sidewalk 5 side of the upper surface is cut out to form a stepped shape. The protrusion 2d is formed, and the inverted triangular dovetail groove 8 is provided on the lower surface of the core body 2 in two rows in the longitudinal direction.

The step-like projections 2 c and 2 d are embedded in the road surface in a wedge-like state, and the dough groove 8 on the bottom surface is filled with the dry cement 7 and solidified, so that the road surface 6 is meshed with the cement. Since the curbstone 1 is firmly fixed, it is possible to sufficiently withstand a strong impact from the outside, and the shock absorber 3 can reliably absorb the impact.

Therefore, even in the case of a strong collision of the tires of a car such as a traffic accident, the curb 1 does not float up, the shock is reliably absorbed, and the damage caused by the traffic accident is reduced. be able to.

[0044]

[Effect of device]

 As described in claim 1, since the cushioning body 3 made of the soft elastic material is fixed to the outer peripheral portion of the core body 2 made of the hard elastic material, the impact caused by the collision of the automobile with the curb 1 is effective. Can be absorbed by the vehicle and the repulsive force of the tire can be reduced, so that the car can be prevented from passing over the curb 1 and the damage caused by the collision with the utility pole or the house can be reduced. .

Further, since the soft cushioning body 3 is fixed to the hard core body 2 which is a material having good adhesiveness, it has good adhesiveness and does not peel off even in long-term use and can be used with peace of mind. In addition, rubber waste can be recycled and the weight is significantly reduced, so workability and safety during installation can be greatly improved.

Since the step-like projections 2c and 2d are provided on the side surfaces 2a and 2b on the road surface side of the hard core body 2 as described in claim 2, the step-like projections 2c and 2d are provided on the road surface (roadway). 4. Since it bites into the sidewalk 5) and engages and is firmly fixed, it can withstand a strong impact from the outside and can reliably absorb the shock. In addition, the joint portion 2e with the road surface is not peeled off or damaged, and the durability is improved.

As described in claim 3, since the side surfaces 2a, 2b of the hard core body 2 are formed in an inclined shape and the lower side is widened, the curb 1 is raised against an external impact. Since the curb 1 and the road surface (the road 4 and the sidewalk 5) are firmly joined to each other, it is possible to reliably exert the impact absorbing effect.

Since the dovetail groove 8 is formed on the bottom surface of the hard core body 2 as in claim 4, the dry mortar 7 is engaged and joined, and is firmly fixed to the roadbed 6 of the road. It is possible to sufficiently withstand a strong impact from the outside, it is possible to reliably prevent the curb 1 from floating upward, and it is possible to reliably exert the impact absorbing effect.

As described above, according to the present invention, it is possible to realize a safe curb having a sufficient shock absorbing function and capable of reducing damage caused by a car accident.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a curb having a shock absorbing function according to the present invention.

FIG. 2 is a sectional view showing another embodiment of a curb having a shock absorbing function according to the present invention.

FIG. 3 is a sectional view showing another embodiment of a curb having an impact absorbing function according to the present invention.

FIG. 4 is a sectional view showing a curbstone having a shock absorbing function according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view showing an example of a conventional curb having a shock absorbing function.

[Explanation of symbols]

 1 Curb 2 Core body 2a, 2b Core body side surface 2c, 2d Step-like protrusion 2e Joint surface 3 Buffer body 4 Roadway 5 Sidewalk 6 Roadbed 7 Dry mortar (mixture of sand and cement) 8 Dovetail groove 9 L-shaped gutter groove 10 Central separation band 11 Projection

Claims (4)

[Scope of utility model registration request] 1. A curbstone characterized in that a buffer body (3) made of a soft elastic material is fixed to an outer peripheral portion of a core body (2) made of a hard elastic material. 2. The curb according to claim 1, wherein step-shaped projections (2c, 2d) are provided on side surfaces (2a, 2b) of the hard core body (2) on the road surface side. 3. The side surfaces (2a, 2) of the hard core body (2).
The curb according to claim 1, wherein b) is formed in an inclined shape, and the lower side is widened. 4. The curb according to claim 1, wherein a dovetail groove (8) is formed on the bottom surface of the hard core body (2).