JP2010189878A - Road sign - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a road sign which facilitates implementation of various improvements, such as a reduction in the weight of a member. <P>SOLUTION: The base 2 of the road sign includes a core 24 and an outer layer 25 covering the core 24. The core 24 and the outer layer 25 are made of synthetic resin materials different from each other. The synthetic resin making up the outer layer 25 improves the appearance of the base 2 including its texture. The synthetic resin making up the core 24 is the synthetic resin having features of a small specific gravity, being inexpensive, and being recycled from a used product. These features are thus reflected on the base 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a road marking body installed standing on a road for the purpose of centerline marking, lane guidance marking, traffic regulation guidance marking, or the like on a road.

  Conventional road markings installed on a center line or the like are manufactured using various materials, but synthetic resins that are generally inexpensive and lightweight are often used. The low cost of the material is a very important factor, but the fact that it is lightweight is also an important point because it reduces the burden on the installer during installation and removal.

  Various proposals regarding the improvement of road marking objects have been published. For example, in Patent Document 1, a vertical cylindrical sign body body is erected above a base portion installed on a road surface, and a synthetic resin shrink tube made of polyethylene terephthalate is put on the outer peripheral surface of the sign body body. A road marking body provided with a peelable portion that can be easily cut along the length direction has been filed and published by the present applicant. This case proposes an improvement of road marking objects by a different method.

Japanese Patent No. 2851228

  A method often used for reducing the product weight is to reduce the thickness of the member by providing a meat stealing portion. However, since this method has a problem of reducing the strength of the member, the strength is sufficient when used for a road marking object installed in a center line or the like and sometimes used in an environment where the vehicle is stepped on. You must be careful.

  Therefore, the present invention provides a road marking body capable of easily implementing various improvements such as reducing the weight of a member.

In order to achieve the above object, the present invention is configured as follows.
That is, the road marking body according to the present invention is a road marking body including a base portion and a main body portion protruding upward from the base portion,
The base part includes a core part and an outer layer part covering the core part,
The core portion and the outer layer portion are formed of different synthetic resins.

  According to the road marking body according to the present invention, since the core portion and the outer layer portion are formed of different synthetic resins, the appearance of the base portion is improved by the synthetic resin constituting the outer layer portion, and the core The properties of the synthetic resin constituting the part can be reflected in the base part. For this reason, a base part can be reduced in weight by forming a core part with a synthetic resin with small specific gravity. In addition, by using an inexpensive synthetic resin or a recycled raw material for the core part, it is possible to improve cost reduction and environmental burden.

  According to the road marking body according to the present invention, various improvements such as reducing the weight of the member can be easily performed.

It is the front view and top view which show one Embodiment of the road marking body which concerns on this invention. It is AA sectional drawing of FIG.

Embodiments of the present invention will be specifically described with reference to the drawings.
In the drawings, 1 is a main body portion of a road marking body, 2 is a base portion, and the road marking body according to the present invention is configured by projecting the main body portion 1 on the upper end surface of the base portion 2. Yes.

As for the main-body part 1, the cap part 12 is being fixed by melt | fusion so that the upper end of the column part 11 formed in the cylindrical hollow columnar body may be plugged up. A reflection sheet 14 having retroreflectivity that reflects outgoing light in parallel to incident light is attached to the outer peripheral side surface of the column portion 12.
The main body portion 1 is formed of the thermoplastic polyurethane resin so that the main body portion 1 is flexible so that it can be restored to its original state after being stepped on by a vehicle or the like. Can be suitably used.

4 is a reinforcing cylinder. The reinforcing cylinder 4 is formed in a cylindrical shape having an outer diameter slightly smaller than the inner diameter of the column part 11.
The material of the reinforcing cylinder 4 is preferably a thermoplastic polyurethane, a soft polyolefin, an elastomer, or the like in consideration of ease of molding, resilience to treading of a vehicle, durability, and the like.

The base portion 2 is formed in a flat truncated cone shape, and is provided with an annular pillar insertion annular groove 22 for inserting the pillar portion 11 on the upper surface, and an annular reinforcement cylinder insertion for inserting the reinforcement cylinder 4 therein. The annular groove 21 is formed so as to be provided.
The column part 11 and the reinforcing cylinder 4 are respectively inserted into the column part inserting annular groove 22 and the reinforcing cylinder inserting annular groove 21 and fused and fixed.
By fusing the reinforcing cylinder 4 to the base portion 2 together with the column portion 11, when the vehicle body passes over the road marking body and the main body portion 1 is bent, the stress applied to the base portion of the column portion 11 is increased. The reinforcing cylinder 4 can be dispersed.

  An air vent hole 13 is formed in the upper end of the cap portion 12 so as to penetrate from the upper surface to the lower surface. By providing the air vent hole 13, when the main body portion 1 is stepped on and crushed by a vehicle or the like, the air inside the main body hollow portion 15 in the column portion 11 of the hollow columnar body is discharged from the air vent hole 13. 1 is prevented from bursting due to an increase in internal air pressure.

On the side wall of the base portion 2, a side wall groove portion 23 for attaching the band-like reflecting member 3 is formed over the entire circumference.
The reflecting member 3 is provided with a reflector 31 made of glass beads at an appropriate interval on a strip-shaped base material 32. The reflector 31 is preferably made of glass beads that have high retroreflectivity that reflects light parallel to the incident light, and that is not easily soiled or deteriorated. You may stick. The material of the base material 32 may be a metal such as steel, stainless steel, or aluminum. However, in order to make it easy to embed and form the reflector 31, a highly elastic synthetic material such as rubber, urethane resin, or elastomer is used. It is preferable to use a resin, and it is more preferable to use a thermoplastic synthetic resin having a certain degree of hardness, such as polyethylene or polypropylene, so that the reflector 31 is unlikely to come off.
The band-shaped reflecting member 3 is wound around and attached to the side wall groove portion 23 of the base portion 2. The reflecting member 3 is difficult to come off by being wound around the side wall groove portion 23, and the reflector 31 can be provided without protruding from the outer surface of the base portion 2 by the amount of the side wall groove portion 23. This is preferable because it can prevent displacement. Further, the reflection member 3 may be attached to the outer periphery of the base portion 2 without providing the side wall groove portion 23. In addition, the reflecting member 3 may be attached with a reflecting tape as it is, or may be attached so that a glass reflector is embedded in the outer periphery of the base portion 2 as it is.

The base portion 2 includes an inner core portion 24 and an outer layer portion 25 disposed on the outer side so as to cover the core portion 24. As the material of the core portion 24, a hard synthetic resin having a small specific gravity can be suitably used. For example, a synthetic resin having a relatively low specific gravity such as polyethylene or polypropylene, a relatively inexpensive synthetic resin such as ABS, EVA, AS, or polystyrene, or a recycled synthetic resin raw material regenerated from a used product or the like may be used. it can. Moreover, as a material of the outer layer portion 25, a synthetic resin having good weather resistance can be preferably used, and polyurethane, soft PVC, ASA, acrylic resin, or the like can be preferably used. Further, by using the same material as that of the main body portion 1 for the outer layer portion 25, it is possible to give a sense of unity to the entire appearance of the road marking body.
By using a synthetic resin having a specific gravity smaller than that of the outer layer portion 25 for the core portion 24, the weight of the base portion 2 can be reduced while maintaining the appearance of the outer layer portion 25.
Further, the core portion 24 can be manufactured at a lower cost by using an inexpensive synthetic resin, and the environmental load can be reduced by using a recycled synthetic resin raw material.

  As a method for forming the base portion 2, it is preferable to use insert molding in which the core portion 24 is formed in advance and the outer layer portion 25 is formed outside thereof, or sandwich molding in which the core portion 24 and the outer layer portion 25 are simultaneously formed. Can do. Although a method of forming the outer layer portion 25 as a coating film around the core portion 24 by a method such as painting is also conceivable, it is difficult to maintain the durability of the outer layer portion 25 in an environment where a road marking object is crushed by a vehicle or the like. There is.

  In the base portion 2, the reinforcing tube insertion annular groove 21 and the column portion insertion annular groove 22 are formed of a synthetic resin for the outer layer portion 25. By not forming these grooves with the synthetic resin of the core portion 24, it is possible to suppress the impact applied when the vehicle or the like contacts the main body portion 1 from being concentrated on the boundary portion between the core portion 24 and the outer layer portion 25. Therefore, it becomes difficult for the base part 2 to be destroyed.

DESCRIPTION OF SYMBOLS 1 Main body part 11 Column part 12 Cap part 13 Air vent hole 14 Reflective sheet 15 Main body hollow part 2 Base part 21 Reinforcing cylinder insertion annular groove 22 Column part insertion annular groove 23 Side wall groove part 24 Core part 25 Outer layer part 3 Reflective member 31 Reflector 32 Base material 4 Reinforcing cylinder

Claims (1)

A road marking body including a base portion and a main body portion protruding upward from the base portion,
The base part includes a core part and an outer layer part covering the core part,
The road marking body, wherein the core portion and the outer layer portion are formed of different synthetic resins.

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