JP6876495B2 - Road sign pillar - Google Patents

Description

The present invention relates to a road sign post, and more particularly to a road sign post that can be quickly attached and detached.

A large number of road signposts have been erected at various locations on the road to mark sidewalks, outside lines, center lines, diversions, etc. for the purpose of smoothing road traffic and ensuring traffic safety. (Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-185330

Normally, after the road sign pillar is constructed, it may be damaged and should not be removed until it is replaced.

However, for example, in snow removal work in a snowfall area, the main body of the sign pillar standing on the road may become an obstacle. Therefore, the main body of the sign pillar may be temporarily removed during the winter when snowfall is expected.

In the conventional road sign pillar, the screw groove of the bolt shaft protruding below the pedestal portion provided at the lower part of the sign pillar body is screwed into the screw hole of the burial leg (female screw anchor) embedded in the road surface. It is installed together.
By rotating the sign pillar body counterclockwise, the sign pillar body can be removed, and by rotating it clockwise, the sign pillar body can be reattached.

However, the bolts used for the road sign pillars are stipulated by the highway standards to be screw size M24 (P = 3.0). Further, it is stipulated that the protruding length of the bolt from the pedestal portion is 47 ± 2 mm. Therefore, the fitting length of the burial leg and the bolt is about 28 mm, and in order to attach / detach the sign pillar body, it is necessary to rotate the sign pillar body by about 9 rotations.

The number of signposts in a snowy area is enormous, ranging from several thousand to tens of thousands, and the work of attaching and detaching by the above-mentioned about nine rolling operations requires a great deal of labor and time.

Therefore, an object of the present invention is to provide a road sign pillar which improves the workability of removal immediately before the snowfall season and the workability of installation after the snowfall season.

Further, other problems of the present invention will be clarified by the following description.

The above problems are solved by the following inventions.

1. 1. Sign pillar body and
A pedestal provided at the bottom of the sign post body and
A mounting shaft that protrudes downward from the pedestal,
In a road sign pillar which is buried in a road surface and has a burial leg for mounting and fixing the mounting shaft.
The mounting shaft is provided with a key that projects in a direction perpendicular to the axial direction.
The burying leg comprises a cylindrical pipe portion and a lid portion fixed to the upper part of the pipe portion.
A support hole having a diameter larger than the shaft diameter of the mounting shaft is provided in the central portion of the lid portion, and a key groove through which the key of the mounting shaft is inserted is provided in at least one place around the support hole. Is provided,
On the back surface of the lid portion, a stop pin is formed so as to project from the back surface toward the inside of the pipe portion.
At least one stop pin is formed at a position away from the keyway.
A road sign column characterized in that the key abuts on the stop pin to stop the rotation of the mounting shaft.
2. The road sign pillar according to the above 1, wherein the key is detachably fixed to the surface of the mounting shaft.
3. 3. The mounting shaft has a flat surface formed so as to cut out a circumferential surface in the longitudinal direction.
The road sign pillar according to 1 above, wherein the key is fixed to the flat surface portion.
4. The road sign column according to 1, 2 or 3, wherein the key stops the rotation of the mounting shaft by a metallic sound when the key abuts on the stop pin.
5. The invention according to any one of claims 1 to 4, wherein a reverse rotation prevention pin projecting toward the inside of the pipe portion is provided on the back surface of the lid portion at a position adjacent to the key groove. Road sign pillar.

According to the present invention, it is possible to provide a road sign pillar in which the workability of removal immediately before the snowfall season and the workability of installation after the snowfall season are improved.

Partial sectional view explaining the road sign pillar which concerns on 1st Embodiment Cross-sectional view showing an enlarged view of the road sign pillar mounting structure The figure explaining an example of a mounting shaft The figure explaining an example of the burial leg Partial cross-sectional view explaining how to install a road sign pillar Enlarged perspective view of the main part explaining how to install the road sign pillar The figure explaining an example of the attachment / detachment mechanism of a road sign pillar The figure explaining the burying leg of the road sign pillar which concerns on 3rd Embodiment The figure explaining another example of the attachment / detachment mechanism of the road sign pillar of the same above.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a partial cross-sectional view for explaining the road sign pillar according to the first embodiment, and FIG. 2 is a partial cross-sectional view showing an enlarged attachment structure of the road sign pillar shown in FIG.

As shown in FIG. 1, the road sign pillar 1 has a sign pillar main body 2, a pedestal portion 3, and a burial leg 4.

The sign column main body 2 is made of a resin columnar body, and has a head 21 at the upper end portion. Most of the sign column body 2 is formed in a hollow shape. Here, a double structure in which a hollow tubular reinforcing body 22 is provided inside the sign column main body 2 is illustrated, but the reinforcing body 22 may be omitted as appropriate. The lower end of the sign column body 2 is, for example, a core portion 23 formed in a solid state by resin.

The pedestal portion 3 is a base portion installed on the road surface GL, and is formed of resin or the like in a circular shape having a diameter larger than that of the sign column main body 2. The pedestal portion 3 supports and fixes the sign pillar main body 2.

The unit composed of the sign pillar main body 2 and the pedestal portion 3 is a portion of the road sign pillar 1 arranged on the road surface GL, and is also a portion to be attached / detached.

The burial leg 4 is formed of a metal such as steel and is buried in the road surface GL. The burial legs 4 are fixed to the road surface GL by the adhesive A.

As shown in FIG. 2, the unit including the sign pillar main body 2 and the pedestal portion 3 is attached to the burying leg 4 by the attachment shaft 5 fixed to the unit.

The mounting shaft 5 has a mounting shaft head portion 51 and a shaft body 52.

The mounting shaft head 51 is arranged in the resin constituting the core portion 23 of the sign column main body 2. Since the mounting shaft head 51 is surrounded by the resin constituting the core portion 23, the mounting shaft 5 is prevented from rotating with respect to the sign column main body 2.

The shaft body 52 penetrates the center of the bottom of the pedestal portion 3 and projects downward from the pedestal portion 3.

The shaft body 52 projecting downward from the pedestal portion 3 is attached to the burying legs 4 embedded in the road surface GL.

Hereinafter, the mounting shaft 5 and the burial leg 4 constituting the road sign pillar in the first embodiment will be described in detail, and then the usage and attachment / detachment (mounting / detaching) of the road sign pillar will be described.

First, the mounting shaft 5 will be described with reference to FIG. 3 (a) is a plan view, FIG. 3 (b) is a side view, FIG. 3 (c) is a front view, and FIG. 3 (d) is a bottom view.

The mounting shaft 5 is made of metal, and the mounting shaft head 51 has a diameter larger than that of the shaft body 52. Here, the case of a hexagon bolt is shown, but the present invention is not limited to this.

In this first embodiment, a ready-made bolt having a screw groove is processed and used.

A screw groove remains on the side surface of the shaft body 52. This embodiment has one significance in that it can be implemented by simply processing an off-the-shelf road sign pillar. This is because there are already a huge number of ready-made products on the street.

A flat surface portion 53 is provided on the side surface (also referred to as a circumferential surface) of the shaft body 52. Here, the flat surface portion 53 is formed by notching the circumferential surface of the ready-made shaft main body 52 provided with the screw groove so as to form a flat surface parallel to the axial direction of the shaft main body 52.

The flat surface portion 53 is formed from the central side of the shaft main body 52 in the axial direction to the lower end of the shaft main body 52. The flat surface portion 53 is formed on the side surface of the shaft main body 52 so as not to cut out the shaft center of the shaft main body 52.

A key 6 is provided on the flat surface portion 53. In the present embodiment, the key 6 is formed by a key head 61 of a bolt screwed into a screw hole 54 provided in a flat surface portion 53.

The key 6 is composed of a key head 61 and a key shaft 62 screwed into a screw hole 54.

The key head 61 of the key 6 has a diameter larger than that of the key shaft 62, and here, the case of a hexagon socket head cap screw is shown, but the present invention is not limited to this. The key 6 composed of the key head 61 serves as a key when attaching / detaching the road sign pillar.

The key shaft 62 of the key 6 holds the key 6 including the key head 61 at a predetermined position by being screwed into the screw hole 54 of the flat surface portion 53.
With the key 6 screwed, the key 6 projects to a position outside the circumferential surface of the shaft body 52 of the mounting shaft 5.

The circumferential surface referred to here is a virtual circumferential surface shown by the dotted line S in FIG. 3 (b). That is, in the flat surface portion 53 on which the key 6 is provided, the circumferential surface is notched and does not actually exist, but can be imagined as an extension of the circumferential surface of the not-notched portion.

Next, the burial leg 4 will be described with reference to FIG. 4 (a) is a plan view, and FIG. 4 (b) is a sectional view taken along line bb in FIG. 3 (a).

The burying leg 4 has a plate-shaped lid portion 41 and a tubular pipe portion 42.

The lid portion 41 is provided so as to cover the upper end of the pipe portion 42. A support hole 43 for inserting the shaft body 52 of the mounting shaft 5 is provided in the central portion of the lid portion 41. The support hole 43 has a circular shape having a diameter slightly larger than the diameter of the shaft body 52.

At one end of the support hole 43, a key groove 44 is continuously provided so as to expand the support hole 43 laterally (diameterally). The key groove 44 is formed so that when the shaft body 52 is inserted into the support hole 43, the key 6 aligned with respect to the key groove 44 can pass through.

The key 6 provided on the shaft body 52 of the mounting shaft 5 protrudes beyond the diameter of the support hole 43 when the shaft body 52 and the support hole 43 are concentrically arranged, but is large enough to fit in the key groove 44. Has a diameter.

A stop pin 45 is provided on the lower surface of the lid portion 41 so as to project downward toward the inside of the pipe portion 42. The stop pin 45 is provided at a position where it comes into contact with the key 6 when the mounting shaft 5 is rotated clockwise by a predetermined amount with the shaft body 52 inserted through the support hole 43. The stop pin 45 is provided on the side opposite to the key groove 44 when viewed from the support hole 43. In the present embodiment, the columnar stop pin 45 is used, but the shape of the stop pin 45 is not limited to this.

A hole 46 penetrating the wall surface of the pipe portion 42 is provided in the lower portion of the pipe portion 42. A plurality of holes 46 (four in the illustrated example) are provided on the circumference of the pipe portion 42 at predetermined intervals. By allowing the adhesive A to flow into the hole 46, the hole 46 exerts a function of preventing the burying leg 4 from coming off from the road surface GL and a function of preventing the burying leg 4 from rotating with respect to the road surface GL.

Next, the road sign pillar will be described in more detail by explaining how to use the road sign pillar and the attachment / detachment mechanism.

FIG. 5 is a partial cross-sectional view illustrating a method of attaching a road sign pillar, and FIG. 6 is an enlarged perspective view of a main part (attachment shaft 5 and burying leg 4) of FIG.

As shown in FIG. 5, the burying legs 4 are embedded in the road surface GL and fixed to the road surface GL by the adhesive A surrounding the outer periphery and the lower portion of the pipe portion 42.

At the time of burying, it is preferable that the lower end of the pipe portion 42 is closed in advance by the lower lid 47. The lower lid 47 is not particularly limited as long as it closes the lower end of the pipe portion 42, and is inserted into a cap-shaped one that covers the outer circumference of the lower end of the pipe portion 42 and covers the lower end of the pipe portion 42, or inside the lower end of the pipe portion 42. A plug-like object that covers the lid can be used. In the illustrated example, a plug-shaped lower lid 47 is used.

By providing the lower lid 47, the adhesive A is prevented from flowing into the inside of the pipe portion 42. As a result, a space for receiving the shaft body 52 of the mounting shaft 5 can be reliably secured inside the pipe portion 42.

Further, when a plug-shaped lower lid 47 is used, as shown in FIG. 5, the lower lid 47 can close the hole 46 provided in the lower part of the pipe portion 42 from the inside. As a result, it is possible to prevent the adhesive A from flowing into the pipe portion 42 from the hole 46 while maintaining the above-mentioned effect of the hole 46 to prevent the adhesive from coming off and rotating.

A packing 11 made of a resin such as polyethylene and a retaining ring 12 made of a metal such as SUS304 are mounted on the shaft body 52 of the mounting shaft 5 protruding below the pedestal portion 3. The packing 11 is arranged between the retaining ring 12 and the bottom surface of the pedestal portion 3. By using at least one of the packing 11 and the retaining ring 12, preferably both, the effect of stably holding the road sign column after installation can be obtained.

When attaching the road sign pillar, first, as shown in FIG. 6, the key 6 provided on the flat surface portion 53 of the shaft main body 52 is provided at one end of the support hole 43 of the embedding leg 4. Align so that it is oriented toward the groove 44 side. In this state, the shaft body 52 having the key 6 is inserted into the support hole 43 having the key groove 44, and the key 6 is inserted until it is arranged below the lid portion 41 of the embedding leg 4.

When the key 6 is arranged below the lid portion 41 of the embedding leg 4, the lower surface of the retaining ring 12 shown in FIG. 5 comes into contact with the upper surface of the lid portion 41, and further insertion is prevented. Instead of the retaining ring 12, the packing 11 or the lower surface of the pedestal portion 3 may be configured to come into contact with the upper surface of the lid portion 41.

When the key 6 is arranged below the lid 41 of the burying leg 4, the mounting shaft 5 is rotated half a turn.

The rotation of the mounting shaft is stopped by the metallic sound of the key 6 contacting the stop pin 45. Just by detecting this metallic sound, it is possible to know the end of installation, which greatly improves workability.

FIG. 7 is a diagram illustrating an example of a mechanism for attaching / detaching a road sign pillar. FIG. 7 (a) shows the state before the half-turn rotation of the mounting shaft 5 (the state during the mounting work and the removable state), and FIG. 7 (b) shows the state after the half-turn rotation of the mounting shaft 5 (the mounted state). Each is shown. 7 (a-1) and 7 (b-1) are plan views, FIGS. 7 (a-2) and 7 (b-2) are side views, and FIG. 7 (a-3). ) And FIG. 7 (b-3) are conceptual diagrams illustrating the positional relationship between the mounting shaft 5 and the embedding legs 4.

First, as shown in FIG. 7A, the key 6 is aligned with the key groove 44 in the state before the mounting shaft 5 is rotated half a circle. In this state, the road sign pillar can be removed by pulling out the mounting shaft 5 upward.

On the other hand, as shown in FIG. 7B, the key 6 is arranged at a position deviated from the key groove 44 in the state after half-rotation of the mounting shaft 5. In this state, even if the mounting shaft 5 is to be pulled out upward, the key 6 comes into contact with the lower surface of the lid portion 41 of the embedding leg 4 and cannot be pulled out. This is because the key 6 protrudes beyond the diameter of the support hole 43. This completes the installation of the road sign pillar.

At this time, the stop pin 45 provided on the lower surface of the lid portion 41 exerts a function of limiting the clockwise rotation of the mounting shaft 5 at a predetermined position. That is, when the key 6 that moves in the circumferential direction with the rotation of the mounting shaft 5 abuts on the stop pin 45, it exerts a function of generating a metallic sound as described above to detect the end of rotation.

In particular, when the work of rotating the mounting shaft 5 half a circle is to be performed quickly for mounting a large number of road sign pillars, an excessive force acts and excessive rotation is likely to occur. On the other hand, by providing the stop pin 45, even if an excessive force is applied, the mounting shaft 5 can be reliably rotated half a turn to a predetermined position, and both quick work and reliable mounting can be achieved. ..

In the present specification, "half-circumferential rotation" does not necessarily mean a rotation of 180 °, and as shown in FIG. 7B, a rotation such that the key 6 is not aligned with the keyway 44. Any rotation may be sufficient, and the rotation may be less than one rotation. The stop pin 45 can be provided at a desired position so that the rotation is limited by the intended amount of rotation.

When removing the road sign pillar, the mounting shaft 5 is rotated half a circle in the opposite direction to bring it into the state shown in FIG. 7A, and the road sign pillar 1 can be removed by pulling it upward.

As described above, the effect that the road sign pillar 1 can be quickly attached and detached can be obtained. In particular, since a large number of road sign pillars 1 are installed on the road surface GL, the efficiency of the installation work can be significantly improved. Further, the efficiency of the replacement work due to the damage or life of the road sign pillar 1 and the temporary removal work due to the snow removal work in the snowfall area can be remarkably improved.

[Second Embodiment]
The second embodiment describes a case where the mounting shaft 5 is newly machined and formed without using a ready-made bolt. As for other configurations, the same configurations as those in the first embodiment can be used, and thus the description thereof will be omitted.

In the second embodiment, since the mounting shaft 5 is newly machined and formed, it is not necessary to provide a screw groove on the side surface of the shaft body 52. Further, in this case, the key 6 provided on the shaft body 52 of the mounting shaft 5 may be machined and formed integrally with the main body of the mounting shaft 5 when the mounting shaft is machined and formed. The key 6 may be detachably fixed by providing a screw hole for fixing the 6 on the side surface of the mounting shaft 5.

Further, the side surface of the shaft body 52 may be machined to form a flat surface portion 53 to provide a key 6, or a screw hole may be provided in the flat surface portion 53 so that the flat surface portion 53 is orthogonal to the flat surface portion 53. The key 6 may be screwed in the direction of the key 6 to be detachably fixed.

[Third Embodiment]
In the third embodiment, a case where a plurality of pins provided on the lower surface of the lid portion 41 of the embedding leg 4 are provided will be described. Since the parts other than the description of the present embodiment use those of the first embodiment and the second embodiment, the description thereof will be omitted.

In the present embodiment, the number of pins provided on the lower surface of the lid 41 is not limited to one, and may be a plurality. Hereinafter, as a second embodiment, a mode in which two pins are provided on the back surface of the lid 41 will be described with reference to FIGS. 8 and 9.

FIG. 8 is a diagram illustrating a leg for burying a road sign pillar according to a third embodiment. 8 (a) is a plan view, and FIG. 8 (b) is a sectional view taken along line bb in FIG. 8 (a).

The embedding leg 4 shown in FIG. 8 has a reverse rotation prevention pin 48 on the back surface of the lid 41 in addition to the stop pin 45 described above.

As described above, the stop pin 45 exerts a function of limiting the amount of rotation of the mounting shaft 5 in the mounting work of the sign post main body.

On the other hand, the reverse rotation prevention pin 48 is provided at a position where it comes into contact with the key 6 when the mounting shaft 5 is rotated with the shaft body 52 inserted through the support hole 43, similarly to the stop pin 45. There is. However, unlike the stop pin 45, the reverse rotation prevention pin 48 is provided at a position adjacent to the key groove 44. In the illustrated example, it is provided at a position adjacent to the keyway 44 counterclockwise.

A mode in which the reverse rotation prevention pin 48 is provided will be described with reference to FIG.

FIG. 9 is a diagram illustrating an example of a road sign pillar attachment / detachment mechanism according to a third embodiment. FIG. 9A shows a state immediately after the mounting shaft 5 is inserted (a state during mounting work and a removable state), and FIG. 9B shows a state after half a rotation of the mounting shaft 5 (mounted state). Are shown respectively. In FIG. 9, (a-1) and (b-1) are plan views, (a-2) and (b-2) are side views, and (a-3) and (b-3) are embedded with the mounting shaft 5. It is a conceptual diagram explaining the positional relationship with the leg 4.

As shown in FIG. 9A, the key 6 is aligned with the key groove 44 immediately after the mounting shaft 5 is inserted. In this state, when the rotation direction tries to rotate in the reverse rotation direction (in the illustrated example, it is counterclockwise), the counterclockwise prevention pin 48 prevents the rotation from rotating counterclockwise. There is. In other words, it can only rotate clockwise.

Then, when it is rotated half a turn clockwise, the state as shown in FIG. 9B is obtained.
That is, when the key 6 is rotated half a turn clockwise, the key 6 comes into contact with the stop pin 45 and does not rotate any more. This completes the installation work.

As a result, the rotation direction of the mounting shaft 5 is restricted to a certain direction during the mounting work of the road sign pillar. As a result, the work can be performed without hesitation about the rotation direction, so that the installation work can be further speeded up.

On the other hand, during the removal work, the state shown in FIG. 9 (b) is changed to the state shown in FIG. 9 (a). That is, the key 6 that has been in contact with the stop pin 45 is rotated half a turn counterclockwise around the mounting shaft 5 to align the key 6 with the key groove 44.

Then, when the state shown in FIG. 9A is reached, the removal work is completed by pulling out the road sign pillar.

At this time, the presence of the reverse rotation prevention pin 48 prevents the key 6 and the key groove 44 from being further rotated counterclockwise from the aligned state. Therefore, even if the positions of the key 6 and the key groove 44 are not finely adjusted, the position of the key 6 and the key groove 44 can be easily aligned by bringing the key 6 into contact with the reverse rotation prevention pin 48.

As a result, when the road sign pillar is removed, the key 6 of the mounting shaft 5 and the key groove 44 can be easily aligned with each other, so that the removal work can be further speeded up.

In the above description, the case where the stop pin 45 and the reverse rotation prevention pin 48 are provided on the back surface of the lid portion 41 of the embedding leg 4 has been described, but the present invention is not limited to this. The stop pin 45 and the reverse rotation prevention pin 48 may be provided on the embedding leg 4 so as to be in contact with the key 6, and may be provided on the inner peripheral surface of the pipe portion 42, for example.

In the above description, the case where the flat surface portion 53 provided on the shaft body 52 of the mounting shaft 5 is formed from the central side in the axial direction of the shaft body 52 to the lower end of the shaft body 52 has been described. Not limited. By providing the flat surface portion 53 at least at a position where the key 6 is provided, an effect that the key 6 can be stably held can be obtained.

In the present invention, the key head 61 of the key 6 may be formed so as to protrude from the outer peripheral surface of the shaft body 52, and when the sign column body 2 is attached, the attachment shaft 5 becomes a support hole 43. The key 6 may be formed so as to protrude so as not to come off the key 6.

1: Road sign pillar 11: Packing 12: Retaining ring 2: Mark pillar body 21: Head 22: Reinforcing body 23: Core part 3: Pedestal part 31: Through hole 4: Buried leg 41: Lid part 42: Pipe part 43: Support hole 44: Key groove 45: Stop pin 46: Hole 47: Lower lid 48: Reverse rotation prevention pin 5: Mounting shaft 51: Mounting shaft head 52: Shaft body 53: Flat part 54: Screw hole 6: Key 61: Key head 62: Key axis GL: Road surface S: Virtual outer surface of the bolt axis

Claims (5)

Sign pillar body and
A pedestal provided at the bottom of the sign post body and
A mounting shaft that protrudes downward from the pedestal,
In a road sign pillar which is buried in a road surface and has a burial leg for mounting and fixing the mounting shaft.
The mounting shaft is provided with a key that projects in a direction perpendicular to the axial direction.
The burying leg comprises a cylindrical pipe portion and a lid portion fixed to the upper part of the pipe portion.
A support hole having a diameter larger than the shaft diameter of the mounting shaft is provided in the central portion of the lid portion, and a key groove through which the key of the mounting shaft is inserted is provided in at least one place around the support hole. Is provided,
The back surface of the lid, a stop pin projecting toward the interior of the pipe section from the back surface is formed,
At least one stop pin is formed at a position away from the keyway.
The key abuts on the stop pin to stop the rotation of the mounting shaft .
On the surface of the mounting shaft, road sign posts, wherein Rukoto the key is detachably fixed. Sign pillar body and
A pedestal provided at the bottom of the sign post body and
A mounting shaft that protrudes downward from the pedestal,
In a road sign pillar which is buried in a road surface and has a burial leg for mounting and fixing the mounting shaft.
The mounting shaft is provided with a key that projects in a direction perpendicular to the axial direction.
The burying leg comprises a cylindrical pipe portion and a lid portion fixed to the upper part of the pipe portion.
A support hole having a diameter larger than the shaft diameter of the mounting shaft is provided in the central portion of the lid portion, and a key groove through which the key of the mounting shaft is inserted is provided in at least one place around the support hole. Is provided,
On the back surface of the lid portion, a stop pin is formed so as to project from the back surface toward the inside of the pipe portion.
At least one stop pin is formed at a position away from the keyway.
The key abuts on the stop pin to stop the rotation of the mounting shaft.
The mounting shaft has a flat surface formed so as to cut out a circumferential surface in the longitudinal direction.
Road signs column you characterized in that said key to flat portion is fixed. Sign pillar body and
A pedestal provided at the bottom of the sign post body and
A mounting shaft that protrudes downward from the pedestal,
In a road sign pillar which is buried in a road surface and has a burial leg for mounting and fixing the mounting shaft.
The mounting shaft is provided with a key that projects in a direction perpendicular to the axial direction.
The burying leg comprises a cylindrical pipe portion and a lid portion fixed to the upper part of the pipe portion.
A support hole having a diameter larger than the shaft diameter of the mounting shaft is provided in the central portion of the lid portion, and a key groove through which the key of the mounting shaft is inserted is provided in at least one place around the support hole. Is provided,
On the back surface of the lid portion, a stop pin is formed so as to project from the back surface toward the inside of the pipe portion.
At least one stop pin is formed at a position away from the keyway.
The key abuts on the stop pin to stop the rotation of the mounting shaft.
A road sign column characterized in that the lower end of the mounting shaft fixed to the burial leg is separated from the burial leg in the axial direction. The road sign pillar according to claim 3, wherein the lower surface of the pedestal portion can be directly or indirectly contacted with the upper surface of the lid portion. The invention according to any one of claims 1 to 4, wherein a reverse rotation prevention pin projecting toward the inside of the pipe portion is provided on the back surface of the lid portion at a position adjacent to the key groove. Road sign pillar.

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