JP2018071242A - Sign post - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sign post having excellent restorability after the pole has been deformed, and which can maintain an erected state for a long time.SOLUTION: A flexible pole is provided with: a cylindrical outer column; a cylindrical first inner column stored inside thereof; and a cylindrical second inner column arranged on the farther inside and stored in the outer column. The inner diameter of the first inner column, which is undetachably provided on a base, is formed to be 1.5 mm or greater than the outer diameter of the second inner column. When the outer column is deformed, the first inner column and the second inner column support the outer column inside thereof, allowing recovery from the deformation; thus, the erected state of the outer column can be well maintained. As the inner diameter of the first inner column is formed to be 1.5 mm or greater then the outer diameter of the second inner column, damage to the columns can be reduced by suppressing the friction between the inner peripheral surface of the first inner column and the outer peripheral surface of the second inner column when the first inner column and the second inner column are deformed so as to be bent by the external force received by the outer column.SELECTED DRAWING: Figure 4

Description

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

  Various types of signposts such as road marking bodies and vehicle stops that are formed in a columnar shape and stand on a road surface have been used. In such a marker column, various inventions have been disclosed for a configuration including a flexible pole that flexes elastically when the vehicle comes into contact and then restores the original state.

  For example, Patent Literature 1 discloses a marker column including a base and a flexible main body column that protrudes upward from the base, and the main body column includes a cylindrical outer column, and an outer column of the outer column. A cylindrical inner column and a cylindrical reinforcing cylinder housed inside are provided, the outer column and the inner column are arranged concentrically and are provided in a non-detachable manner on the base, and the reinforcing cylinder is a lower end cylinder Disclosed by the applicant of the present invention is a sign post characterized in that a wall is inserted between the inner pillar and the outer pillar and is fixed to any of the inner pillar, outer pillar and base. Has been.

JP2015-117477A

  The marker column shown in Patent Document 1 reduces damage to the main body column by providing a reinforcing cylinder that increases the rigidity of the main body column without fixing it to the inner column, the outer column, or the base. Provides a sign post which can maintain the standing state of the pole satisfactorily by different configurations.

In order to achieve the above object, the present invention is configured as follows.
That is, the sign post according to the present invention is a sign post comprising a base and a flexible pole standing above the base,
The pole is a cylindrical outer column, a cylindrical first inner column accommodated inside the outer column, and a cylindrical shape disposed inside the first inner column and accommodated in the outer column With a second inner pillar of
The outer pillar, the first inner pillar, and the second inner pillar are detachably provided on the base, 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. It is characterized by being formed.

According to the sign post according to the present invention, since a flexible pole is erected above the base, even when the pole is deformed so as to bend in contact with the vehicle, the original state is restored thereafter, The standing state can be continued.
The pole includes a cylindrical outer column, a cylindrical first inner column that is accommodated inside the cylindrical outer column, and a cylindrical second inner column that is disposed inside and accommodated in the outer column. Since the outer pillar, the first inner pillar, and the second inner pillar are provided so as not to be detachable from the base, when the outer pillar is deformed to bend by receiving an external force, the inner pillar The second inner pillar supports the outer pillar together with the first inner pillar to restore deformation, and the standing state of the outer pillar can be satisfactorily continued.
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 first inner pillar and the second inner pillar are caused by the external force received by the outer pillar. When the column is deformed to be bent, 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 column and the outer peripheral surface of the first inner column is determined by the inner peripheral surface of the first inner column and the outer peripheral surface of the second inner column. If the outer pillar, the first inner pillar, and the second inner pillar are deformed so as to bend by receiving an external force, the inner peripheral surface of the outer pillar, Friction between the one inner pillar and the outer peripheral surface of the second inner pillar is suppressed, and damage can be reduced, which is preferable.

  According to the marker column of the present invention, the resilience after the pole is deformed is good, the durability is high, and the standing state can be maintained for a long time.

It is a front view which shows one Embodiment of the marker pillar which concerns on this invention. It is a figure which shows the state which removed the base from the installation part of the base of FIG. It is a longitudinal cross-sectional view near the base of the pole of FIG. It is a table | surface showing the structure and test result of the Example and comparative example of a marker pillar which concern on this invention. It is a figure which shows roughly the condition where the 1st inner pillar and 2nd inner pillar of a marker pillar restore | restore to an original state after a deformation | transformation.

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

The pole 2 includes an outer column 21 formed in a cylindrical hollow columnar body, and a cap 25 is fixed so as to close the opening above the column.
Further, a reflection sheet 24 having retroreflectivity for reflecting the irradiated light in the light source direction is attached to the outer surface of the outer pillar 21. The reflection sheet 24 is wound around and adhered to the outer side surface of the outer column 21, and four reflection sheets 24 are juxtaposed on the outer column 21 of the present embodiment with a vertical interval.

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

2 is a view showing a state in which the base 7 is removed from the installation portion 6 of the base 5 in FIG. 1, and FIG. 3 is a longitudinal sectional view of the vicinity of the base 7 in FIG.
The pole 2 includes a cylindrical first inner column 22 and a cylindrical second inner column 23 inside the outer column 21, and the first inner column 22 and the second inner column 23. Each lower end is fixed to the base 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 disposed inside the first inner pillar.
In the pole 2, an outer column 21, a first inner column 22, and a second inner column 23 are arranged concentrically and each lower end is fixed to the base 7 of the base 5.

3 is a longitudinal sectional view of the vicinity of the base 7 of the pole 2 in FIG.
The base 7 is formed in a ring shape having a through hole 75 penetrating vertically.
An annular groove 71 and an annular groove 72 disposed inside the annular groove 71 are formed concentrically on the upper surface of the base 7, and the lower end of the outer column 21 is inserted into the annular groove 71 and fused. In addition, 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 forms a stepped portion 72a having a bottom surface of the radially inner portion higher than the outer side, over the entire circumference.
The second inner pillar 23 is fixed to the annular groove 72 with its lower end abutting against the upper surface of the stepped portion 72a.
The first inner column 22 is fixed with its lower end in contact with the bottom surface of the annular groove 72 outside the stepped 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, considering the ease of molding and the resilience, durability, etc. with respect to stepping on a vehicle or the like. It is preferable to use 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 using thermoplastic polyurethane.

The first inner pillar 22 is provided inside the outer pillar 21 so that when the vehicle comes into contact with the pole 2 and the outer pillar 21 is bent and deformed, the first pillar 22 is restored to the original state. The inner pillar 22 contacts the inner peripheral surface of the outer pillar 21 and supports it from the inside, thereby restoring the outer pillar 2 satisfactorily.
In addition, when the second inner pillar 23 is arranged inside the first inner pillar 22 and provided, when the outer pillar 21 and the first inner pillar 22 are bent and deformed, the original state is restored. The 2nd inner pillar 22 contacts the inner peripheral surface of the outer pillar 21 or the 1st inner pillar 22, supports from an inner side, and restores favorably.

A gap S <b> 2 is formed between the inner peripheral surface of the outer column 21 and the outer peripheral surface of the first inner column 22, which are each provided in a cylindrical shape and arranged concentrically.
1 to 3 is a concentric circular column 21 having an outer diameter 21 formed in a cylindrical shape with an outer diameter of 80 mm and a thickness of 3.1 mm, and a first inner column 22 formed in a cylindrical shape with an outer diameter 65. The gap S2 having a radial size of about 4.4 mm is provided.
By providing the gap S2, when the 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, the outer pillar 21 and the first inner pillar 22 are restored. Since the friction between the two members is reduced and the friction between the two members is reduced, the damage of the two members and the breakage of the fixing portion between the two members and the pedestal 7 can be suppressed.

A gap S <b> 1 is formed between the inner peripheral surface of the first inner column 21 and the outer peripheral surface of the second inner column 23, which are each provided in a cylindrical shape and arranged concentrically.
By providing the gap S1, when the 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 is deformed. Since the pillar 22 and the second inner pillar 23 are easily separated from each other and friction between both members is reduced, damage to both members and breakage of a fixing portion between both members and the base 7 can be suppressed.

FIG. 4 is a table showing the configuration and test results of the example and comparative example of the marker column 1 according to the present invention.
Example 1 is based on the configuration 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 cylindrical wall thickness of 2.5 mm, an outer diameter of 58.5 mm, and a cylindrical wall A second inner pillar 23 formed in a cylindrical shape with a thickness of 3.8 mm and an outer pillar 21 were arranged concentrically and fixed to the base 7 to form the marker pillar 1.

  Comparative Example 1 is a matter in which the dimensions of the first inner pillar 22 are different from those of the first embodiment. The first inner pillar 22 formed in a cylindrical shape with an outer diameter of 65 mm and a cylindrical wall thickness of 3 mm, and the outer diameter A second inner pillar 23 formed in a cylindrical shape with 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 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 cylindrical wall thickness of 3 mm; The outer column 21 was concentrically arranged and fixed to the pedestal 7 to form the marker column 1.

Next, a running test performed for Example 1 and Comparative Examples 1 and 2 will be described.
The running test is a test vehicle that is installed on a road by repeatedly stepping on the test specimen with a test carriage that runs on a ring road with vehicle tires, and visually observing the number of steps and the condition of the test specimen. This is a test for evaluating durability.
Specifically, each of the marking pillars 1 of Example 1 and Comparative Examples 1 and 2 to be a test body is installed on an annular road on which a vehicle tire of the test carriage is stepped with a load of about 1200 kg, and the test carriage Was run on the annular road at a speed of 70 km / h, and the test specimens were repeatedly stepped on, and the restored state of the test specimens 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 sign post 1” column in the table shown in FIG. 4, and the sign post 1 of Example 1 is that of the test carriage. Even after the vehicle tire was stepped 1300 times, the outer pillar 21 of the pole 2 was restored to the original state where it was erected from the base 5.
On the other hand, the sign post 1 of Comparative Example 3 that does not include the second inner post 23 cannot be restored from the state in which the outer post 21 is bent when it is stepped 73 times with the vehicle tire of the test carriage. The state can no longer be maintained.
Further, in the marker column 1 of Comparative Example 2 in which the thickness of the cylindrical wall of the first inner column 22 is larger than that of Example 1, when the outer column 21 is stepped on 544 times with the vehicle tire of the test carriage, It was not possible to recover from the bent state, and it was impossible to maintain the standing state.
That is, the comparative example 2 provided with the second inner pillar 23 was able to confirm better restoration than the comparative example 3 not provided with this, but the thickness of the cylindrical wall of the first inner pillar 22 was the comparative example. It could be confirmed that Example 1 made smaller than 2 clearly shows even better restoration properties.

As a factor in which Example 1 has good recoverability even though the thickness of the cylindrical wall of the first inner pillar 22 is thin, the inner diameter of the first inner pillar 22 and the outer diameter of the second inner pillar 23 are The size of the gap S1 resulting from the difference can be considered.
Specifically, the marker column 1 according to the first embodiment in which the gap S1 is provided is larger than the inner peripheral surface of the first inner column 22 when the pole 2 is bent or 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 state in which the first inner pillar 22 and the second inner pillar 23 of the marker pillar 1 are restored to their original state after deformation. 5A shows an 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 FIG. 5B shows the inner diameter of the first inner pillar 22. The outline | summary of the comparative example 1 with a small difference of the outer diameter of the 2nd inner pillar 23 is shown.
When the pole 2 is crushed by the wheel of the vehicle, the first inner pillar 22 and the second inner pillar 23 under the wheel are deformed into a flat shape until they are instantaneously formed into a substantially flat plate shape.
Thereafter, when the original inner column 22 and the second inner column 23 are restored from the flat shape to the cylindrical shape when the original inner column 22 is restored to the original standing state, the first inner column 22 has the inner peripheral surface. It is supported by the second inner pillar 23 abutting on the.
At this time, as shown in FIGS. 5A and 5B, the first embodiment forms a larger difference between the inner diameter of the first inner column 22 and the outer diameter of the second inner column 23 than the first comparative example. Thus, the contact area between the inner peripheral surface of the first inner column 22 and the outer peripheral surface of the second inner column 23 is made smaller than in the first comparative example, and the friction generated between the two members is reduced.
5A and 5B show a situation where the first inner pillar 22 and the second inner pillar 23 are deformed and then restored to the original state. Even when the second inner pillar 23 is deformed, the effect of reducing the friction can be similarly 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. it is conceivable that.

By reducing the friction generated between the inner peripheral surface of the first inner column 22 and the outer peripheral surface of the second inner column 23, the load applied to the cylindrical walls of both members is reduced, so that the damage can be suppressed. .
Further, by reducing the friction, in particular, the load on the fixed portion between the first inner column 22 and the pedestal 7 and the fixed portion between the second inner column 23 and the pedestal 7 is reduced, and both members Desorption 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 both members, the deterioration of the member due to the heat generated by the friction. And the effect of reducing damage can be expected.
Specifically, if the difference between the inner diameter of the first inner pillar 22 and the outer diameter of the second inner pillar 23 is formed large, the temperature rises by frictional heat when both members are restored to their original state after being deformed. The heat of the first inner pillar 22 and the second inner pillar 23 is dissipated to the gap S1 formed to be larger, so that deterioration and damage due to heat are reduced.

Further, the friction reduction 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 when the center of the first inner pillar 22 and the center of the second inner pillar 23 are slightly displaced, it is considered that the gap S1 can be obtained.
In addition, the above-described effect is obtained even when the cylindrical shape of the first inner column 22 or the second inner column 23 formed of an elastic material to make the pole 2 flexible is slightly distorted. If this occurs, it is considered to be obtained.

In addition, the marker pillar 1 which concerns on this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.
For example, 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 is formed with a stepped portion 72a having a bottom surface higher than the others. However, it may not 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. Different annular grooves 73 may be formed, and the lower end of the second inner pillar 72 may be inserted therein.

  The pole 2 has the lower ends of the outer column 21, the first inner column 22 and the second inner column 23 fused and fixed to the pedestal 7, respectively, but is not limited thereto. For example, it may be fixed not by fusion but by adhesion with an adhesive, and the molten resin is inserted into a mold in which the lower ends of the outer pillar 21, the first inner pillar 22 and the second inner pillar 23 are inserted. May be formed by insert molding to form the pedestal 7, or the outer pillar 21, the first inner pillar 22, and the second inner pillar 23 may be integrally formed during the injection molding of the pedestal 7. Good.

  Further, the base 5 is provided so that it can be detachably attached to an installation part 6 formed separately from a base 7 to which the lower end of the pole 2 is fixed. However, the present invention is not limited to this, and the installation part 6 and the base 7 are not limited thereto. May be provided integrally.

DESCRIPTION OF SYMBOLS 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 Base 71 Annular groove 72 Annular groove 72a Step part S1 Gap S2 Gap

Claims (2)

A sign post comprising a base and a flexible pole erected above the base,
The pole is a cylindrical outer column, a cylindrical first inner column accommodated inside the outer column, and a cylindrical shape disposed inside the first inner column and accommodated in the outer column With a second inner pillar of
The outer pillar, the first inner pillar, and the second inner pillar are detachably provided on the base, 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. A sign post that is formed. The size of the gap between the inner peripheral surface of the outer column and the outer peripheral surface of the first inner column is between the inner peripheral surface of the first inner column and the outer peripheral surface of the second inner column. The sign post according to claim 1, wherein the sign post is provided larger than the gap.

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