JP4238800B2 - Car stop - Google Patents

Description

  The present invention relates to a car stop used for protecting a sidewalk, for indicating a boundary between a roadway and a sidewalk, or for prohibiting an automobile from entering a parking lot, a park, a street, or the like.

  Conventionally, steel pipes, stone pillars, concrete pillars, etc. are generally used as this type of car stop, but these have great rigidity, so if a vehicle collides with them, people or vehicles will be damaged. There is a problem.

In order to improve such a point, many proposals have been made in which when a vehicle or the like collides, the vehicle stop is bent to absorb and reduce the impact. An example is as follows.
JP-A-6-248619 No. 6-37051 No. 6-45450 Japanese Patent Laid-Open No. 10-168844

  Although these conventional technologies can be bent and absorb and reduce the impact when a vehicle collides, they are not only complicated and expensive in structure, but also change the rigidity of the vehicle stop itself, change of bending characteristics, etc. When it is desired to do so, the entire configuration must be changed, and there is a problem that it is difficult to provide products according to specifications and applications.

  In order to improve such problems of the prior art, the present inventors, etc., have a hollow support strut that has elasticity, a pedestal that is integrally coupled to the lower end of the strut hull, and a pedestal that is integrally coupled to the pedestal. It consists of a reinforcing body arranged up to a desired height position in the strut skin and a foam filled in the strut skin, and the foam is filled and foamed in the strut skin to form a strut, Inventing a vehicle stopper that imparts a desired rigidity to the column by selectively combining the material of the column outer shell and the material of the foam, and imparts a bending characteristic at the height position of the reinforcing member. A patent application is pending as Japanese Patent Application No. 2003-355404.

  According to the prior invention, as described above, since the strut is constituted by the elastic hollow strut outer shell and the foam filled therein, the rigidity of the strut obtained thereby is the material of the strut outer shell. Can be set arbitrarily by changing the combination of the foam material and the impact force when the vehicle collides with the column is absorbed and relaxed by the bending of the column. Since the height is specified by changing the height of the reinforcing body, it can be made suitable for the desired specification application.

  Thus, in the invention of the prior application, by changing the combination of the hollow support column outer shell having elasticity and the foam, it is possible to give the support column the rigidity necessary for stopping the vehicle. Research on the subsequent imparting of self-restoring is insufficient, and satisfying both functions of imparting the rigidity necessary for stopping the car and providing self-restoring after releasing the car after bending It was extremely difficult. That is, there is a problem that if the strength is emphasized, the restoration property is inferior, and if the restoration property is emphasized, the strength is inferior and the function as a vehicle stop cannot be performed.

  An object of the present invention is to provide a vehicle stop that can improve the problems of the invention of the prior application as described above and satisfy both functions of strength required for the vehicle stop and subsequent self-restoring.

  In order to achieve the above object, the present invention provides a hollow support strut having elasticity, a pedestal integrally coupled to the lower end of the strut hull, and a desired height in the strut hull integrally coupled to the pedestal. A reinforcing body disposed up to the position, and a foam filled in the column outer shell, and the column is filled and foamed into the column outer shell to form a column, and the column outer shell material and foam In combination with the material of the body, a desired rigidity is imparted to the column, and a car stopper that is provided with a bending characteristic at the height position of the reinforcing body. (For example, polyurethane) and a strong resin material (for example, ABS) formed of a composite material in which PU / ABS = 35/65 to 70/30, preferably 45/55 to 60/40, is mixed. Features .

  As described above, according to the present invention, in the car stop according to the invention of the prior application, the column outer shell is molded using a composite material in which an elastic resin material (polyurethane) and a strength resin material (ABS or the like) are mixed, and PU. Is set to PU / ABS = 35/65 to 70/30, preferably 45/55 to 60/40, so that when the vehicle collides at a predetermined speed or less, the column is bent. Thus, it is possible to provide a function of alleviating the impact and stopping the vehicle, and a function of restoring the column substantially vertically when the vehicle is removed thereafter.

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

  FIG. 1 shows an embodiment of a car stopper according to the present invention, wherein 1 is a hollow support shell having desired strength and elasticity, 2 is a foam filled and foamed in the support shell, 3 is a base, Is a cap, 5 is a reflection sheet, 6 is a bolt with a hook, and 7 is a reinforcement.

  The strut skin 1 is formed into a cylindrical shape using a composite material in which an elastic resin material (for example, polyurethane) and a strength resin material (for example, ABS) are mixed, and the blending ratio of both is set to a specific range. However, the blending ratio and the reason for the determination will be described later.

The foam 2 is, for example, a semi-rigid foam polyurethane having physical properties shown in Table 4 below, but the material is not limited to this.

Although the said base 3 is a polyurethane which has a physical property shown in following Table 5, for example, the material is not limited to this.

The cap 4 is, for example, polyethylene having physical properties shown in Table 6 below, but the material is not limited to this.

  The reinforcing body 7 is made of a material having desired reinforcing properties, for example, a metal plate formed into a cylindrical shape having a smaller diameter than the outer skin of the column, but the material is not limited thereto.

  The vehicle stopper according to the present invention is made of the material as described above, and a base 3 having a fixing hook bolt 6 for fixing to the ground projecting from the bottom at the lower end of the pillar outer skin 1 together with the pillar outer skin 1 and the reinforcing body 7. Molding is performed, and the foam 2 is injected into the column outer skin 1 to be foam-cured. In the case of this embodiment, the cap 4 is put on the top of the column outer shell before the foam is injected, and is integrated with the column outer shell 1 and the foam 2 by filling and foaming of the foam 2. The fixing method can be arbitrarily implemented.

  In the present invention, the hollow column outer shell is made of an elastic resin material (for example, polyurethane) and a strong resin material (for example, ABS) in terms of weight ratio of PU / ABS = 35/65 to 70/30, preferably 45. It is formed by a composite material mixed at a blending ratio of / 55 to 60/40. As the strength resin material, polycarbonate or polyethylene terephthalate (PET) can be used instead of ABS.

The specific blending ratio and the physical property values of the strut skin obtained thereby are as shown in Tables 1, 2 and 3 below.

The physical properties of polyurethane and ABS, which are the basis of these blends, are as shown in Table 7 and Table 8 below.

  In the present invention, the blending ratio of the elastic resin material and the strength resin material is set as described above for the following reason. That is, the present inventors made a trial manufacture of a vehicle stop using a plurality of column outer shells in which the blending ratio of polyurethane and ABS was changed, and tested the vehicle stop function and the recoverability. As shown in FIG. 2, the car stopper used for the test had a height of about 800 mm, a diameter of 135 mm, a wall thickness of the column outer shell of 2.5 mm, and a height of the reinforcement body of 175 mm. When an impact force acts on the torque position of 700 mm, the vicinity of the height position of the reinforcing body 7 is bent so that the vehicle can be stopped.

  The results are as shown in FIGS. 3 (a) and (b). 3 (a) is an explanatory diagram showing the relationship between PU / ABS and resilience, and FIG. 3 (b) is an explanatory diagram showing the relationship between PU / ABS and the vehicle stop function (hardness). As shown in the figure, when the PU ratio is low, almost no resilience is observed, but when the PU ratio exceeds 30%, the resilience increases rapidly, and the vehicle collides and bends to approximately 90 °. When PU / ABS is 35/65 to 70/30, the angle is restored by 70% or more after 1 hour, and when PU / ABS is 45/55 to 60/40, 1 hour later. It was confirmed that the angle was restored by 90% or more, and in any case, it was possible to restore to a substantially vertical state after 24 hours.

  Thus, in the present invention, the strut outer skin of the car stop according to the invention of the prior application is, in weight ratio, elastic resin material / strength resin material = 35 / 65-70 / 30, preferably 45 / 55-60 / 40. It is composed of a composite material mixed at a blending ratio, and it has a function of stopping a car that has collided at a predetermined speed or less, and can reliably restore a car stop bent by the collision.

It is explanatory drawing which shows one Embodiment of the vehicle stop by this invention. It is explanatory drawing which shows the test condition of the vehicle stop of embodiment shown in FIG. It is a figure for demonstrating the relationship between the compounding ratio of PU and ABS, and a bending restoring property, and the relationship between the compounding ratio of PU and ABS, and a vehicle stop function (hardness).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Outer shell, 2 ... Foam, 3 ... Base, 4 ... Cap, 5 ... Reflective sheet, 6 ... Reed bolt, 7 ... Reinforcement body.

Claims (2)

  A hollow support strut having elasticity, a base integrally coupled to a lower end of the strut skin, a reinforcing body integrally coupled to the base and disposed in a strut skin to a desired height position, and It is composed of a foam filled in the strut skin, and the foam is filled and foamed in the strut skin to form a strut, and a desired strut is made by a combination of the strut skin material and the foam material In a vehicle stopper that imparts rigidity and a bending characteristic at the height position of the reinforcing body, the hollow strut shell is made of an elastic resin material and a strength resin material in a weight ratio, and an elastic resin material / strength. Resin material = 35/65 to 70/30, preferably formed of a composite material mixed at a blending ratio of 45/55 to 60/40. 2. The vehicle stop according to claim 1, wherein the elastic resin material constituting the support outer shell is polyurethane, and the strength resin material is ABS, polycarbonate, or polyethylene terephthalate.

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