JP6849394B2 - Sign pillar - Google Patents

Description

The present invention relates to a road sign body installed on a road surface for lane separation, roadside separation, etc., and a sign pillar that can be suitably used for a car stop installed in a parking lot or the like.

Conventionally, various types of signposts such as road signs and bollards that are formed into columns and erected on the road surface have been used. Various inventions have been disclosed for such a sign column as having a flexible pole that elastically bends when the vehicle comes into contact and then restores to its original state.

For example, Patent Document 1 describes a marking column including a base and a main body column having flexibility protruding upward from the base, and the main body column is a cylindrical outer column and the outer column. It is provided with a cylindrical inner column and a cylindrical reinforcing cylinder to be housed inside, and the outer column and the inner column are arranged concentrically and provided to the base so as not to be detachable. The applicant discloses a marker column characterized in that a wall is inserted between the inner column and the outer column and is provided in a state where the wall is not fixed to any of the inner column, the outer column, and the base. Has been done.

JP-A-2015-117477

The sign column shown in Patent Document 1 reduces damage to the main body column by providing a reinforcing cylinder for increasing the rigidity of the main body column in a state where it is not fixed to the inner column, the outer column, or the base. Provides a sign post that can maintain a good standing pole with different configurations.

In order to achieve the above object, the present invention has the following configuration.
A sign column comprising a base and a flexible pole erected above the base.
The pole has a cylindrical outer pillar, a cylindrical first inner pillar housed inside the outer pillar, and a cylindrical shape arranged inside the first inner pillar and stored in the outer pillar. It has a second inner pillar and
The outer pillar, the first inner pillar, and the second inner pillar are provided to the base so as not to be detachable, and the inner diameter of the first inner pillar is 1.5 mm or more larger than the outer diameter of the second inner pillar. both the formed, which gap is formed between an outer peripheral surface of the inner circumferential surface of the outer column first inner column,
When the pole is bent and deformed and then restored to its original state, the first inner pillar and the second inner pillar are easily separated from each other, and the outer pillar and the first inner pillar are easily separated from each other. It is characterized by being done.

According to the sign column according to the present invention, since the flexible pole is erected above the base, even if the pole is deformed to be bent in contact with the vehicle, it is subsequently restored to the original state. The standing state can be continued.
Further, the pole has a cylindrical outer pillar, a cylindrical first inner pillar to be stored inside the pole, and a cylindrical second inner pillar to be arranged inside the pole and stored in the outer pillar. In preparation, the outer pillar, the first inner pillar, and the second inner pillar are provided to the base so as not to be detachable. Therefore, when the outer pillar is deformed so as to be bent by receiving an external force, the outer pillar is said to be inside the base. Along with the first inner pillar, the second inner pillar supports the outer pillar and restores the deformation, so that the standing state of the outer pillar can be continued satisfactorily.
Further, since the inner diameter of the first inner pillar is formed to be 1.5 mm or more larger than the outer diameter of the second inner pillar, the external force received by the outer pillar causes the first inner pillar and the second inner pillar to be formed. When the column is deformed so as to bend, the friction between the inner peripheral surface of the first inner column and the outer peripheral surface of the second inner column is suppressed, and these damages can be reduced.

Further, the size of the gap between the inner peripheral surface of the outer pillar and the outer peripheral surface of the first inner pillar is set to the inner peripheral surface of the first inner pillar and the outer peripheral surface of the second inner pillar. If it is provided larger than the gap between the two, when the outer pillar, the first inner pillar, and the second inner pillar are deformed so as to bend due to an external force, the inner peripheral surface of the outer pillar and the first It is preferable because the friction between the one inner pillar and the outer peripheral surface of the second inner pillar is suppressed and the damage can be reduced.

According to the sign column of the present invention, the pole has good resilience after being deformed, has high durability, and can maintain an upright state for a long time.

It is a front view which shows one Embodiment of the sign column which concerns on this invention. It is a figure which shows the state which removed the pedestal from the installation part of the base of FIG. It is a vertical cross-sectional view of the vicinity of the pedestal of the pole of FIG. It is a table which shows the structure and the test result of the Example and the comparative example of the sign column which concerns on this invention. It is a figure which shows the situation which the 1st inner pillar and the 2nd inner pillar of a sign pillar are restored to the original state after deformation.

Embodiments of the present invention will be specifically described with reference to the drawings.
In the drawing, 1 is a signpost.
The sign column 1 of the present embodiment includes a base 5 and a pole 2 fixed to and erected on the upper surface of the base 5.

The pole 2 includes an outer pillar 21 formed in a cylindrical hollow columnar body, and a cap 25 is fixed so as to close an opening above the outer pillar 21.
Further, a reflective sheet 24 having a retroreflective property that reflects the irradiated light toward the light source is attached to the outer surface of the outer pillar 21. The reflective sheet 24 is wound around the outer surface of the outer pillar 21 and attached to the outer pillar 21, and four reflective sheets 24 are arranged side by side at intervals on the upper and lower sides of the outer pillar 21 of the present embodiment.

The base 5 is formed in a substantially truncated cone shape, and the pole 2 is erected so as to project from the upper surface thereof.
The base 5 includes an installation portion 6 to be installed on the installation surface and a pedestal 7 detachably attached to the installation portion 6, and the pedestal 7 having the lower end of the outer pillar 21 fixed is attached to the installation portion 6. , The pole 2 is provided so as to stand upright.

FIG. 2 is a view showing a state in which the pedestal 7 is removed from the installation portion 6 of the base 5 of FIG. 1, and FIG. 3 is a vertical cross-sectional view of the vicinity of the pedestal 7 of FIG.
The pole 2 includes a cylindrical first inner pillar 22 and a cylindrical second inner pillar 23 inside the outer pillar 21, and the first inner pillar 22 and the second inner pillar 23. The lower ends of each are fixed to the pedestal 7.
Specifically, the second inner pillar 23 is formed in a cylindrical shape having an outer diameter smaller than the inner diameter of the first inner pillar, and is arranged inside the first inner pillar.
In the pole 2, the outer pillar 21, the first inner pillar 22, and the second inner pillar 23 are arranged concentrically, and the lower ends of the respective poles 2 are fixed to the pedestal 7 of the base 5.

FIG. 3 is a vertical cross-sectional view of the pole 2 in FIG. 2 near the pedestal 7.
The pedestal 7 is formed in a ring shape having a through hole 75 penetrating up and down in the center.
An annular groove 71 and an annular groove 72 arranged inside the annular groove 71 are concentrically arranged on the upper surface of the pedestal 7, and the lower end of the outer pillar 21 is inserted into the annular groove 71 and fused. At the same time, the lower ends of the first inner pillar 22 and the second inner pillar 23 are inserted into the annular groove 72 and fused to be fixed.

The annular groove 72 is formed with a stepped portion 72a having a bottom surface of an inner portion in the radial direction higher than the outer side over the entire circumference.
The lower end of the second inner pillar 23 is brought into contact with the upper surface of the step portion 72a and fixed to the annular groove 72.
Further, the first inner pillar 22 is fixed by abutting the lower end thereof with the bottom surface of the annular groove 72 on the outer side of the step portion 72a.

The outer pillar 21, the first inner pillar 22, and the second inner pillar 23 constituting the pole 2 are made of thermoplastic polyurethane in consideration of ease of molding, resilience to trampling of a vehicle, durability, and the like. It is preferably formed using a material such as soft polyolefin, elastomer, or rubber. The outer pillar 21, the first inner pillar 22, and the second inner pillar 23 are each formed of thermoplastic polyurethane.

By providing the first inner pillar 22 inside the outer pillar 21, when a vehicle or the like comes into contact with the pole 2 and the outer pillar 21 is bent and deformed and then restored to the original state, the first The inner pillar 22 of the above comes into contact with the inner peripheral surface of the outer pillar 21 and supports it from the inside, so that the outer pillar 2 is satisfactorily restored.
Further, by arranging and providing the second inner pillar 23 inside the first inner pillar 22, when the outer pillar 21 and the first inner pillar 22 are bent and deformed and then restored to the original state, The second inner pillar 22 comes into contact with the outer pillar 21 and the inner peripheral surface of the first inner pillar 22 to support it from the inside and restore it satisfactorily.

A gap S2 is provided between the inner peripheral surface of the outer pillar 21 and the outer peripheral surface of the first inner pillar 22, which are provided in a cylindrical shape and arranged concentrically.
In the marker pillar 1 shown in FIGS. 1 to 3, the outer pillar 21 formed in a cylindrical shape having an outer diameter of 80 mm and a thickness of 3.1 mm and the first inner pillar 22 formed in a cylindrical shape having an outer diameter of 65 are concentric. By arranging in, a gap S2 having a radial size of about 4.4 mm is provided.
By providing the gap S2, when a vehicle or the like comes into contact with the pole 2 and the outer pillar 21 and the first inner pillar 22 are bent and deformed to their original state, the outer pillar 21 and the first inner pillar 22 are in their original state. Since it is easy to separate the two members and the friction between the two members is reduced, it is possible to suppress damage to both members and damage to the fixed portion between both members and the pedestal 7.

A gap S1 is provided between the inner peripheral surface of the first inner pillar 21 and the outer peripheral surface of the second inner pillar 23, which are provided in a cylindrical shape and arranged concentrically.
By providing the gap S1, when a vehicle or the like comes into contact with the pole 2, and the first inner pillar 22 and the second inner pillar 23 are bent and deformed together with the outer pillar 21, the first inner pillar 22 and the second inner pillar 23 are in their original state. Since the pillar 22 and the second inner pillar 23 are easily separated from each other and the friction between the two members is reduced, damage to both members and damage to the fixed portion between both members and the pedestal 7 can be suppressed.

FIG. 4 is a table showing the configurations and test results of Examples and Comparative Examples of the Marking Pillar 1 according to the present invention.
In Example 1, based on the configurations shown in FIGS. 1 to 3, the first inner pillar 22 formed in a cylindrical shape having an outer diameter of 65 mm and a cylinder wall thickness of 2.5 mm, and an outer diameter of 58.5 mm and a cylinder wall. The second inner pillar 23 and the outer pillar 21 formed in a cylindrical shape with a thickness of 3.8 mm were arranged concentrically and fixed to the pedestal 7 to form the marker pillar 1.

In Comparative Example 1, the dimensions of the first inner pillar 22 are different from those in the first embodiment, and the first inner pillar 22 formed in a cylindrical shape having an outer diameter of 65 mm and a cylinder wall thickness of 3 mm has an outer diameter. The second inner pillar 23 formed in a cylindrical shape having a thickness of 58.5 mm and a cylinder wall thickness of 3.8 mm and the outer pillar 21 are arranged concentrically and fixed to the pedestal 7, and the marker pillar 1 is attached. Formed.

Comparative Example 2 is different from Comparative Example 1 in that the second inner pillar 23 is not provided, and the first inner pillar 22 formed in a cylindrical shape having an outer diameter of 65 mm and a cylinder wall thickness of 3 mm is used. The outer pillar 21 and the outer pillar 21 were arranged concentrically and fixed to the pedestal 7 to form the marker pillar 1.

Next, the running tests performed on Example 1 and Comparative Examples 1 and 2 will be described.
The running test is a test trolley equipped with vehicle tires that runs on a circular road, and the test body is repeatedly stepped on, and various traffic safety products installed near the road are installed based on the number of steps and the visual observation result of the test body condition. This is a test to evaluate durability.
Specifically, the signposts 1 of Examples 1 and Comparative Examples 1 and 2 which are the test bodies are installed on the annular road where the vehicle tires of the test trolley are stepped on with a load of about 1200 kg, respectively, and the test trolley is used. The test piece was repeatedly trampled on the ring road at a speed of 70 km / h, and the restored state of the test piece was visually observed.

The results of the running test of Example 1 and Comparative Examples 1 and 2 are as shown in the "state of the marker column 1" column in the table shown in FIG. 4, and the indicator column 1 of Example 1 is the test carriage. Even after stepping on the vehicle tires 1300 times, the outer pillar 21 of the pole 2 was successfully restored to the original state in which it was erected from the base 5.
On the other hand, the sign pillar 1 of Comparative Example 3 which does not have the second inner pillar 23 cannot be restored from the bent state when the outer pillar 21 is stepped on 73 times with the vehicle tire of the test trolley, and is erected. I can no longer maintain the state.
Further, in the sign column 1 of Comparative Example 2 in which the thickness of the cylinder wall of the first inner column 22 is made larger than that of Example 1, the outer column 21 is stepped on 544 times with the vehicle tire of the test trolley. It could not be restored from the bent state, and it became impossible to maintain the standing state.
That is, the comparative example 2 provided with the second inner pillar 23 was able to confirm better resilience than the comparative example 3 not provided with the second inner pillar 23, but the thickness of the cylinder wall of the first inner pillar 22 was compared with the comparative example. It was confirmed that the first example, which was made smaller than 2, clearly showed better resilience.

Although the thickness of the cylinder wall of the first inner pillar 22 is thin, the factors that the first embodiment has good resilience are the inner diameter of the first inner pillar 22 and the outer diameter of the second inner pillar 23. The size of the gap S1 resulting from the difference is considered.
Specifically, the sign column 1 of the first embodiment in which the gap S1 is provided to be larger is the inner peripheral surface of the first inner column 22 when the pole 2 is bent and deformed or restored to the original state. It is considered that the friction generated between the second inner pillar 23 and the outer peripheral surface is reduced.

FIG. 5 is a diagram schematically showing a situation in which the first inner pillar 22 and the second inner pillar 23 of the sign pillar 1 are restored to their original state after being deformed. In FIG. 5, (a) shows the outline of the first embodiment in which the difference between the inner diameter of the first inner pillar 22 and the outer diameter of the second inner pillar 23 is large, and (b) shows the inner diameter of the first inner pillar 22. The outline of Comparative Example 1 in which the difference between the outer diameters of the second inner pillar 23 and the outer diameter of the second inner pillar 23 is small is shown.
When the pole 2 is trampled by the wheels of the vehicle, the first inner pillar 22 and the second inner pillar 23 under the wheels are deformed flat until they are momentarily formed into a substantially flat plate shape.
After that, when restoring to the original upright state, the first inner pillar 22 and the second inner pillar 23 are restored from a flat shape to a cylindrical shape, while the first inner pillar 22 has an inner peripheral surface. It is supported by a second inner pillar 23 that comes into contact with.
At this time, as shown in FIGS. 5A and 5B, in Example 1, the difference between the inner diameter of the first inner pillar 22 and the outer diameter of the second inner pillar 23 is larger than that of Comparative Example 1. Therefore, the area of contact between the inner peripheral surface of the first inner pillar 22 and the outer peripheral surface of the second inner pillar 23 is made smaller than that of Comparative Example 1, and the friction generated between the two members is reduced.
Note that FIGS. 5 (a) and 5 (b) show a situation in which the first inner pillar 22 and the second inner pillar 23 are restored to their original state after being deformed. Even when the second inner pillar 23 is deformed, the effect of reducing friction by forming a large difference between the inner diameter of the first inner pillar 22 and the outer diameter of the second inner pillar 23 can be obtained in the same manner. it is conceivable that.

By reducing the friction generated between the inner peripheral surface of the first inner pillar 22 and the outer peripheral surface of the second inner pillar 23, the load applied to the cylinder walls of both members is reduced, so that damage can be suppressed. ..
Further, by reducing the friction, in particular, the load on the fixed portion between the first inner pillar 22 and the pedestal 7 and the fixed portion between the second inner pillar 23 and the pedestal 7 is reduced, and both members The detachment from the pedestal 7 is prevented, and the resilience of the pole 2 can be maintained well.

Further, by forming a large difference between the inner diameter of the first inner pillar 22 and the outer diameter of the second inner pillar 23, in addition to the effect of reducing the friction between the two members, the deterioration of the members due to the heat generated by the friction is obtained. And the effect of reducing damage can be expected.
Specifically, if a large difference between the inner diameter of the first inner pillar 22 and the outer diameter of the second inner pillar 23 is formed, the temperature rises due to frictional heat when both members are restored to their original states after being deformed. The heat of the first inner pillar 22 and the second inner pillar 23 is dissipated to the gap S1 formed in a larger size, and deterioration and damage due to heat are reduced.

Further, the friction reducing effect and the heat dissipation effect of the frictional heat obtained by forming a large difference between the inner diameter of the first inner pillar 22 and the outer diameter of the second inner pillar 23 are arranged concentrically. Even if the center of the first inner pillar 22 and the center of the second inner pillar 23 are slightly misaligned, it is considered that the center can be obtained if the gap S1 is generated.
Further, the above effect is obtained even when the cylindrical shapes of the first inner pillar 22 and the second inner pillar 23 formed of the elastic material in order to make the pole 2 flexible are slightly distorted. It is considered that it can be obtained if.

The sign column 1 according to the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.
For example, in the annular groove 72 of the pedestal 7 into which the lower ends of the first inner pillar 22 and the second inner pillar 23 are inserted, a step portion 72a having a lower bottom surface higher than the others is formed. However, it does not have to be formed.
Further, the lower end of the second inner pillar 23 is inserted into the annular groove 72 of the pedestal 7 into which the lower end of the first inner pillar 22 is inserted, but the present invention is not limited to this, and the lower end of the second inner pillar 23 is inserted inside the annular groove 72. A different annular groove 73 may be formed into which the lower end of the second inner column 72 may be inserted.

Further, the pole 2 is fixed by fusing the lower ends of the outer pillar 21, the first inner pillar 22, and the second inner pillar 23 to the pedestal 7, but the pole 2 is not limited to this. For example, it may be fixed by bonding with an adhesive instead of fusing, and the molten resin may be inserted into a mold into which the lower ends of the outer column 21, the first inner column 22, and the second inner column 23 are inserted. May be formed by insert molding to form the pedestal 7 by injecting the pedestal 7, or the outer pillar 21, the first inner pillar 22 and the second inner pillar 23 may be integrally formed at the time of injection molding of the pedestal 7. Good.

Further, the base 5 is provided so that the pedestal 7 having the lower end of the pole 2 fixed can be detachably attached to the separately formed installation portion 6, but the present invention is not limited to this, and the installation portion 6 and the pedestal 7 are provided. And may be provided integrally.

1 Marking pillar 2 Pole 21 Outer pillar 22 First inner pillar 23 Second inner pillar 24 Reflective sheet 25 Cap 5 Base 6 Installation part 7 Pedestal 71 Ring groove 72 Ring groove 72a Step part S1 Gap S2 Gap

Claims (2)

A sign column comprising a base and a flexible pole erected above the base.
The pole has a cylindrical outer pillar, a cylindrical first inner pillar housed inside the outer pillar, and a cylindrical shape arranged inside the first inner pillar and stored in the outer pillar. It has a second inner pillar and
The outer pillar, the first inner pillar, and the second inner pillar are provided to the base so as not to be detachable, and the inner diameter of the first inner pillar is 1.5 mm or more larger than the outer diameter of the second inner pillar. both the formed, which gap is formed between an outer peripheral surface of the inner circumferential surface of the outer column first inner column,
When the pole is bent and deformed and then restored to its original state, the first inner pillar and the second inner pillar are easily separated from each other, and the outer pillar and the first inner pillar are easily separated from each other. A signpost characterized by being made. The size of the gap between the inner peripheral surface of the outer pillar and the outer peripheral surface of the first inner pillar is between the inner peripheral surface of the first inner pillar and the outer peripheral surface of the second inner pillar. The sign post according to claim 1, wherein the sign column is provided larger than the gap between the two.

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