JP3299681B2 - Road marking 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 marking block installed on a median strip or the like of a road.

[0002]

2. Description of the Related Art Conventionally, a road marking block that is temporarily laid to be provided on a median strip of a road, separate a lane, or regulate a running area is made of a square timber made of concrete. A block body having such a shape is generally used. In addition, a road marking block made of a synthetic resin is proposed separately from a concrete-made one ( see Japanese Patent Application Laid-Open No. 7-189221 ).

[0003]

The conditions required for a road marking block installed in a median strip or the like of a road are, firstly, required from the side of a car, such that the driver can easily see the road and travel. Even if a part of the car tire touches, it should not cause a big obstacle to running. Secondly, the road marking blocks are required to have a shape that is difficult to change or break due to the road surface environment, especially temperature changes, that it is difficult to break even when a car gets on, installation work of the road marking blocks And that the removal operation is easy.

[0004] Of the above-mentioned prior arts, the former concrete road marking block is heavy even if its shape is not deformed or damaged by a severe temperature change of the road. Laying work and removal work are not easy. In order to solve this problem, the weight per unit of the block body may be reduced to reduce the volume. However, in order to make the block easily visible to the driver, the height of the road marking block is usually 8 cm high. Is required, the volume of the block body cannot be reduced, and it is impossible to reduce the weight of the block body. In order to prevent danger even if a tire runs on the road during driving, it is conceivable to provide a predetermined slope on one surface in the running direction of the road marking block, but the installation distance in the width direction of the road is limited. It is not possible to provide a sufficient gradient to avoid danger, and the gradient must be steep, close to vertical. Furthermore, in order to prevent the road marking block from being damaged by running tires of a running vehicle, the installation area of the block body may be increased, but in this case, the length of the block body increases, There has been a problem that the weight of the body is increased and the laying and removing operations are more difficult.

[0005] The latter road marking block made of synthetic resin,
Since it is extremely lightweight compared to a concrete road marking block, it is easy to lay and remove, and has a sufficient size that is easy for the driver to visually recognize. Even if it can be provided,
Since the road surface marking block has poor durability such as being deformed or damaged due to severe temperature environment on the road surface, a filler is provided inside the block body to prevent the occurrence of deformation and the like. .

[0006] The present invention has been made in view of the above problems, and an object of the present invention is to prevent the shape from being easily deformed.
An object of the present invention is to provide a lightweight and tough synthetic resin road marking block.

[0007]

In order to achieve the above object, a road marking block according to the present invention is characterized in that a surface facing each other from each of four sides of a rectangular top plate portion has a lower outer surface with a predetermined gradient that is symmetrical. One side which has a side plate portion inclined to the upper side and which is surrounded by a rectangular outer peripheral portion larger than the top plate portion on the lower side of the side plate portion and has an open bottom surface parallel to the top plate portion and becomes hollow. A long trapezoidal block body is formed in the block body, and a plurality of longitudinal ribs and widthwise ribs projecting from the top plate and the side plate toward the open bottom surface are provided at predetermined intervals inside the block. With these multiple longitudinal ribs
A large number of ribs in the width direction
It has excellent shock absorption performance by providing a vacant space .
In addition, a built-up portion is provided on an outer peripheral portion of the block body so that the length is increased.
The ends of multiple ribs in the width direction and width direction
Provide excellent impact performance by providing a corresponding grounding gap
Become . Furthermore, the block body and the rib are connected to the FRP chip.
10-40% by weight of polyethylene, 55-90% by weight of polyethylene,
It is formed by heating and pressing a mixed composition of 2% by weight of titanium .

[0008] The block body and the rib are powder or granules obtained by pulverizing glass fiber reinforced plastic (FRP) which has been cured by reaction, that is, FRP chips and polyethylene (PE) or polypropylene (PP). It is preferable that the mixture composition of the thermoplastic synthetic resin is molded by heating and pressing.

The block body and the rib are 10 to 40% by weight of FRP chip, 55 to 90% by weight of polyethylene,
It preferably comprises a composition of 2% by weight of titanium.

As the FRP chip, it is preferable to use an end material trimmed at the time of finishing a glass fiber reinforced plastic molded product (FRP molded product) or a product obtained by pulverizing waste of the molded product into chips. It is also preferable to use recycled plastic for the thermoplastic synthetic resin.

[0011]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of the road marking block of the present invention, partially cut away, FIG. 2 is a sectional view taken along line YY of FIG. 3, FIG. 3 is a plan view of the road marking block, and FIG. The road marking block A has a rectangular top plate 1, and is inclined downward and outward at a predetermined gradient so that surfaces facing each other from both ends and left and right sides of the top plate 1 are symmetrical. Side plate portions 2 at both ends and left and right side plate portions 3, a rectangular outer peripheral portion 4 larger than the top plate portion 1 on the lower side of the side plate portions 2, 3, surrounded by the outer peripheral portion 4 and A long trapezoidal block body 6 is formed on one side where the bottom surface 5 that is plane-parallel to the top plate portion 1 is released and becomes hollow. Inside the block body 6, a plurality of longitudinal ribs 7 and widthwise ribs 8 projecting from the top plate 1 and the side plates 2, 3 toward the bottom surface 5 are provided at predetermined intervals. The block body 6 is formed by providing a large number of vacant spaces 9 inside the block body 6. Further, a bottom portion 10 is formed at an end of the ribs 7 and 8,
The bottom portion 10 is spaced slightly from the bottom surface 5 surrounded by the outer peripheral portion 4 to the inside of the block body 6, that is, the top plate portion 1.
When a load is applied, the ends of the ribs 7 and 8 are provided at a position having an interval d where the ends contact the ground.

The longitudinal rib 7 provided inside the block body 6 has a central portion extending from one end to the other end with a wider space than the left and right sides, and the rib in the width direction is provided. The ribs 8 are provided so as to be staggered between the center rib 8a and the left and right ribs 8b, and are provided orthogonal to the longitudinal ribs 7. The top plate 1 of the block body 6 is provided with a concave portion 12 for accommodating a head 11a of a fixing bolt 11, and a cylindrical portion 13 through which the fixing bolt 11 is inserted.
And a cross-shaped rib 14 is formed integrally with the longitudinal rib 7 and the rib 8a on the outer periphery of the cylindrical portion 13. The lower end of the cylindrical portion 13 is provided so as to be flush with the ends of the ribs 7 and 8.

The block body 6 and the ribs 7 and 8 are powder or granules obtained by pulverizing a reacted so-called glass fiber reinforced plastic (FRP) of unsaturated polyester reinforced with glass fibers, that is, FRP chips. And a thermoplastic resin such as polyethylene (PE) or polypropylene (PP).

5 and 6, similarly to the road marking block A, the road marking block B has a predetermined shape in which opposite surfaces are symmetrical from both ends and left and right sides of the rectangular top plate 101. It has a side plate portion 102 at both ends and a left and right side plate portion 103 inclined downward and outward with a gradient, and a rectangular outer peripheral portion 104 larger than the top plate portion 101 on the lower side of the side plate portions 102 and 103, A long trapezoidal block 106 is formed on one side which is hollow and has an open bottom surface 105 which is surrounded by 104 and which is in parallel with the top plate 101, and inside the block 106 is a top plate 10
1 and a plurality of longitudinal ribs 107 and widthwise ribs 108 projecting from the side plate portions 102 and 103 toward the release bottom surface 105 at predetermined intervals, and
06 are formed by providing a large number of vacant spaces 109 in the inside.

The block body 10 of the road marking block B
No. 6 is formed by providing a built-up portion 15 having an increased height on the outer peripheral portion 104 on the lower side of the side plate portions 102 and 103. Further, the ends of the ribs 107 and 108 are spaced slightly inside the block body 106 from the open bottom surface 105 surrounded by the outer peripheral portion 104, that is, when the load is applied to the top plate 101, the rib 107 , 108 are provided with a bottom 110 at a position with a spacing d ′ to be grounded.

The block body 106 and the ribs 107 and 108 of the road marking block B are the same as the road marking block A, and are made of an FRP chip and polyethylene (P).
A mixed composition of a thermoplastic synthetic resin such as E) or polypropylene (PP) is molded by heating and pressing.

Further, as a composition material constituting the road marking blocks A and B of the present invention, a material having a mixed composition of an FRP chip and a thermoplastic synthetic resin such as polyethylene (PE) or polypropylene (PP) is used. However, those having a composition ratio between the FRP chip and the polyethylene shown in the following table are suitable for use.

[0018]

[Table 1]

From the above Table 1, as the composition of the present invention,
10 to 40% by weight of FRP chip, 55 of polyethylene
A mixture having a composition of about 90% by weight and 2% by weight of titanium is suitable. As a result of testing a road marking block composed of the composition shown in Table 1 above, 20% by weight of FRP chips and 78% by weight of polyethylene were obtained. A road marking block composed of a composition containing 2% by weight of titanium is the most excellent from the comprehensive viewpoints such as performance and price.

The FRP chip may be a trim piece trimmed at the time of forming and finishing a glass fiber reinforced plastic molded product (FRP molded product) or a chip obtained by crushing waste of the FRP molded product into chips. Can be. Also,
Recycled plastic can also be used as the thermoplastic synthetic resin.

[0021]

The road marking block of the present invention is made of synthetic resin by providing a number of longitudinal and widthwise ribs protruding in the direction of the bottom surface released from the top plate and side plates in the block body. Sink marks and warpage, which are peculiar to molded articles, especially large molded articles. Also, since a large number of square-shaped cavities are provided inside the block body by longitudinal ribs and widthwise ribs, even if the tire rides and is shocked, the load applied to the road marking block is buffered even if shock is given. It is reduced and the road marking block is not damaged. In particular, the pavement marking block of the present invention is not constituted by a so-called FRP molded product obtained by putting a glass fiber as a reinforcing material into unsaturated polyester and reacting and curing the material. A mixture of powdery or floc-shaped so-called FRP chips and a thermoplastic synthetic resin such as polyethylene or polypropylene or a mixture thereof obtained by heating and pressing, has appropriate rigidity and shock absorbing power. Are more prominently provided. Also, when the FRP chip is mixed as a filler into recycled plastic such as polyethylene or polypropylene, the recycled plastic is reduced in shrinkage, less warped or deformed, and has higher rigidity. Therefore, the molding shrinkage of the road marking block of the present invention is reduced, so that warping or deformation hardly occurs over time, and no source of breakage occurs even if an impact is applied.

Further, in the road marking block of the present invention, by providing a built-up portion on the outer periphery of the block body, the strength of the outer periphery forming the open bottom surface is increased, thereby reinforcing the strength of the entire road marking block. . Further, by providing the bottom formed at the lower end of the rib slightly inside the release bottom, when the road surface marking block is tightened and fixed to the road surface with the fixing screw, the bottom formed at the lower end of the rib may become uneven on the road surface. Correspondingly, the block can be stably fixed by being closely grounded. In addition, when the tires of the car are mounted, a large number of ribs provided inside the block body are sufficiently grounded to withstand the load, and the shock absorption and absorption of a large number of vacant spaces formed by the large number of ribs. Have excellent load bearing performance due to the synergistic effect of

Therefore, in the road marking block of the present invention, the ribs provided inside the block body and the many voids formed by the ribs have a remarkable synergistic effect with the characteristics of the composition constituting the road marking block. It works effectively and has extremely excellent performance.

Furthermore, in the wheelchair composition of the present invention, the FRP chip is obtained by pulverizing a reaction-cured glass fiber reinforced plastic molded product (FRP molded product) into chips, so that the FRP molded product is formed into chips. It is possible to use scraps discharged by trimming at the time of molding finishing or chips obtained by grinding waste of FRP molded products, and therefore, not only reduce the amount of waste discharged from the factory, but also discard It will help the effective use of waste and solve the problem of waste pollution.

[Brief description of the drawings]

FIG. 1 is a front view showing a road marking block of the present invention in a partial cross section.

FIG. 2 is a sectional view taken along line YY of FIG. 3;

FIG. 3 is a plan view of a road marking block according to the present invention.

FIG. 4 is a bottom view of a main part of the road marking block of the present invention.

FIG. 5 is a front view showing a partial cross section of a road marking block in a case where a built-up portion is provided on an outer peripheral portion.

FIG. 6 is a bottom view of a main part of the road marking block when a built-up portion is provided on the outer peripheral portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top plate part 2 Side plate part 3 Side plate part 4 Outer peripheral part 5 Bottom surface 6 Block body 7 Rib 8 Rib 9 Empty part 10 Bottom part 15 Overlay part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-124436 (JP, A) Jikken 62-15295 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) E01F 9/06

Claims (2)

(57) [Claims] 1. A rectangular top plate has side plates inclined downward and outward at predetermined symmetrical slopes from the four sides of each side of the rectangular top plate, and is larger than the top plate at the lower side of the side plate. A long trapezoidal block body is formed on one side that is hollow with an open bottom surface that is surrounded by a rectangular outer periphery and that is parallel to the top plate section, and a top plate section is formed inside the block body. And a plurality of longitudinal ribs and widthwise ribs protruding from the side plate portion toward the release bottom surface are provided at predetermined intervals, and the plurality of longitudinal ribs and the plurality of widthwise ribs are used in the interior of the block body by the plurality of longitudinal ribs and the plurality of widthwise ribs. A large number of vacant spaces are provided, and a built-up portion is provided on the outer peripheral portion of the block body, and a gap is formed in which the ends of the plurality of ribs in the length direction and the width direction contact the ground corresponding to the unevenness of the road surface. Road marking block provided with excellent impact performance. 2. A side plate portion which is inclined downward and outward with a predetermined symmetrical slope from each side of the four sides of the rectangular top plate portion, and is larger than the top plate portion on the lower side of the side plate portion. A long trapezoidal block body is formed on one side that is hollow with an open bottom surface that is surrounded by a rectangular outer periphery and that is parallel to the top plate section, and a top plate section is formed inside the block body. And a plurality of longitudinal ribs and widthwise ribs protruding from the side plate portion toward the release bottom surface are provided at predetermined intervals, and the plurality of longitudinal ribs and the plurality of widthwise ribs are used in the interior of the block body by the plurality of longitudinal ribs and the plurality of widthwise ribs. A large number of vacant spaces are provided, a built-up portion is provided on the outer peripheral portion of the block body, and a gap is provided in which the ends of the plurality of ribs in the length direction and the width direction are grounded corresponding to the unevenness of the road surface. The block body and the rib are formed of FR
A road marking block formed by heating and pressing a mixed composition of 10 to 40% by weight of a P chip, 55 to 90% by weight of polyethylene, and 2% by weight of titanium.