JP2010070953A - Fixing structure of road sign pole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing structure of a road sign pole enabling the road sign pole to be quickly and easily installed and removed on and from a road surface and having no theft concerns. <P>SOLUTION: A shaft member shown by a sign 18 is fixed to the road sign pole. A bottomed cylindrical buried leg member shown by a sign 19 is buried in the road surface. A key hole 18a is formed in the lower end surface of the shaft member 18, and a key projection 19a is formed on the bottom surface of the buried leg member 19. The Fig.(A) shows the initial state of the shaft member 18 inserted into the buried leg member 19 in which the lowering of the shaft member is prevented from occurring since the key hole 18a is not engaged with the key projection 19a. When the shaft member 18 is rotated in Fig.(B) and further rotated in Fig.(C), the key hole 18a is aligned with the key projection 19a, and the shaft member 18 is lowered to an installation completion position as shown in Fig.(D). A guide projection 18b is inserted into a guide lateral groove 19c in the state as shown in Fig.(D) to prevent the shaft member 18 from being extracted. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure for fixing a sign post that regulates traffic of pedestrians and passing vehicles to a road surface, and in particular, it can be quickly and easily attached and detached, and it can be stolen or extracted with mischief. The present invention relates to a new fixing structure that has been improved so that there is no fear of being lost.

FIG. 8 is a partially broken front view showing a known example of a marker column.
In general, the marker column 1 is provided with a body 1a on a pedestal 1b so as to be integrally connected, and a reflective sheet 1c is attached to improve the visibility.
In order to install this on the road surface, a bolt 2 is provided integrally with the base 1b as shown in FIG. 8A, and a bottomed cylindrical burying leg 5 is provided in a hole dug in the road surface 6. Fix with adhesive 7,
The integral bolt 2 is screwed into a female screw on the inner peripheral surface of the embedded leg 5 and tightened.
As a known example different from the above, a plurality of mounting holes 10a and 10b are provided in the pedestal 1b as shown in FIG. 8B, and a bolt 16 configured separately from the main body 1a is inserted as shown by an arrow a. It is screwed into a burying leg (not shown in FIG. 8B) and installed on the road surface.

There is a technique disclosed in Japanese Patent Application Laid-Open No. 2002-180425 as a known invention for facilitating the installation of a sign post. FIG. 9 is an explanatory view of the marker pole mounting structure described in the publication.
While installing the burying legs configured as shown in FIG. 9 (A) on the road surface, the sign post is provided with a connector as shown in (B),
When it is fitted as shown in (C) and turned in the direction of arrow B, it is fixed as shown in (D).
Moreover, if it turns to the arrow A direction, fixation will be cancelled | released and removal will be possible.
JP 2002-180425 A

Various structures such as fixing strength, manufacturing cost, and weather resistance are required for the fixing structure of the sign post. However, it is also important to be able to install and remove quickly and easily. There are many signposts that are rarely moved once installed, but for example, traffic restrictions during festivals,
Due to seasonal traffic restrictions (near beaches, ski areas, etc.), it is often necessary to move, temporarily install, or temporarily remove signs.
In such a case, the marker column fixing structure according to the known invention (FIG. 9) is very effective and exhibits excellent practical effects.
However, on the other hand, because it is easy to install and remove, there is a problem that mischief and theft are constant.
Considering this problem, it is recognized that it is difficult to achieve both ease of installation and removal and security.
The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a fixing structure for a marker pillar that can achieve both ease of installation / removal and security.

Figuratively speaking, the structure of the present invention is a sign post mounting structure with a built-in ring of wisdom.
Since it is a ring of wisdom, it can be installed and removed quickly and easily if it knows the procedure for installation and removal, but it is difficult to operate without knowing the procedure. For this reason, mischief and theft can be prevented.
An important feature of the wisdom ring of the present invention is that it is hidden inside and does not appear on the exterior as one of the differences from the ordinary wisdom ring.
The usual ring of wisdom is made so that it can be manipulated while seeing with your eyes, so the structure is complex and it is manufactured with high precision. In contrast, the wisdom ring of the present invention cannot be seen with the eyes, so a simple structure is sufficient and high accuracy is not required.

The basic principle of the present invention will be described with reference to FIG. 1 corresponding to the first embodiment. In this [Means for Solving the Problems] column, drawing symbols are added in parentheses for easy comparison with the drawings, but these bracketed symbols limit the configuration of the present invention as shown in the drawings. Not what you want.
The bottomed cylindrical embedded leg member (19) is embedded and fixed on the road surface. The shaft member (18) fixed to the marker column (1) is inserted downward into the embedded leg member.
(A) The drawing shows the state just inserted.
Since the key protrusion (19a) provided on the bottom surface of the embedded leg member and the key hole (18a) provided on the lower end surface of the shaft member (18) are not aligned, the shaft member is on the key protrusion. The lower end of the shaft member is once at the stop level S.
FIG. 1B shows a state in which the shaft member is rotated so that the key protrusion (19a) and the key hole (18a) are aligned.
Due to the fitting of the key protrusion (19a) and the key hole (18a), the shaft member (18) is lowered to the installation completion level indicated by the symbol E.
When the shaft member is rotated to the state shown in FIG. (B), the guide protrusion (18b) that did not appear in the cross section of FIG.
As shown in FIG. 1, the installation / fixing of the sign post is not completed simply by inserting it as shown in FIG. 1A, but the installation is completed as shown in FIG.
Although it can be extracted by operating in the reverse order, in the state of FIG. Even if it is going to be pulled out, the guide projection (18b) is caught and cannot be pulled out. Furthermore, b. Even if it tries to turn, the key protrusion (19a) and the key hole (18a) are meshed with each other and do not turn.

The configuration of the invention according to claim 1 created based on the above principle is as follows:
(See FIG. 1) Insert the columnar shaft member (18) provided at the lower end of the sign post (1) downward into the bottomed cylindrical embedded leg member (19) embedded in the road surface. In the fixing structure,
As for the insertion position of the shaft member, assuming a level at the time of completion of installation (E when viewed from the lower end of the shaft) and a temporarily stopped level (also S) located above the level of completion of installation,
(See FIG. 2) A longitudinal guide mechanism that guides the shaft member inserted into the bottomed cylindrical embedded leg member to a stop level without rotating,
(See FIG. 3) A rotation direction guide mechanism that allows rotation of the shaft member that has once reached the stop level;
(See FIG. 1) A stopper mechanism that temporarily stops the shaft member inserted downward into the embedded leg member at a stop level;
Once the shaft member once stopped at the stop level rotates by a predetermined angle, a stopper release mechanism that releases the stop in the insertion direction and allows insertion to the installation completion level,
A rotation locking mechanism that locks the shaft member inserted to the installation completion level so that it cannot rotate at the installation completion level;
A locking mechanism that prevents the shaft-like member in a state in which the rotation is locked by the rotation locking mechanism from being pulled out upward at the rotation angle position;
It is characterized by comprising.

The structure of the sign post fixing structure according to the invention of claim 2 is in addition to the structural requirements of the invention structure of claim 1,
(See FIG. 2) From the vicinity of the lower end of the shaft member (18) to the side, a guide projection (18b) protrudes in the radial direction of the shaft,
A vertical guide groove (19b) is formed on the inner peripheral surface of the embedded leg member (19), and the vertical guide mechanism is configured by the cooperation of the guide vertical groove and the guide protrusion,
A guide transverse groove (19c) having a shape in which the inner peripheral surface of the embedded leg member is partially expanded by communicating with the guide longitudinal groove is formed, and the rotation by the cooperation of the guide transverse groove and the guide protrusion. A direction guide mechanism is constructed,
(See FIG. 1 and FIG. 3 together.) A key-like protrusion (19a) having a height corresponding to the stop level (S) is once formed on the bottom surface of the bottomed cylindrical embedded leg member (19). The stopper mechanism is configured by the contact between the key protrusion and the lower end surface of the shaft member,
(See FIG. 1 and FIG. 4 together.) A key groove-shaped hole (18a) having a shape that can be fitted to the key-shaped protrusion is formed on the lower end surface of the shaft member. The stopper release mechanism and the rotation locking mechanism are configured in cooperation with the key protrusion (19a),
(See FIG. 1 (B)) The guide protrusion (18b) and the guide lateral groove (19c) constitute the lock mechanism.

The structure of the fixing structure according to the invention of claim 3 is the key protrusion (23a) formed on the embedded leg member which is a stationary member in addition to the constituent features of the invention structure of claim 2 (see FIG. 6E). ), When the arcuate elongated hole (22c) of the shaft member that is a movable member is fitted and the rotation locking mechanism is acting,
A play angle (φ) that allows the shaft member to rotate with respect to the embedded leg member is provided, and a gap dimension that gives this play angle is 10 times or more of a general tolerance in the design drawing of the marker column. Features.

The structure of the fixing structure according to the invention of claim 4 has an axis with respect to the key protrusion formed on the embedded leg member (19) in addition to the constituent elements of the structure of the invention of claim 3 (see FIG. 7). In a state where the key hole (described above) of the member (18) is fitted,
A plunger (24) that abuts on the upper surface of the guide protrusion (18b) and a coil spring (25) that urges the plunger downward to press the guide protrusion are provided on the embedded leg member. And

According to the invention structure of claim 1,
I. The sign pillar can be installed on the road surface by inserting the shaft member of the sign pillar into the center hole of the buried leg member buried on the road surface and turning it almost at a right angle. There is no need to tighten it many times.
In addition, the sign post can be removed from the road surface by a simple operation of “slightly lifting and turning in a predetermined direction”.
For this reason, it is easy to move the sign post in response to changes in traffic conditions, and installation / removal work can be performed quickly.
Furthermore, although it is easy to attach and detach, the sign post cannot be extracted without knowing the removal procedure, so there is no fear that the sign post will be extracted due to mischief or theft.

When the invention structure of claim 2 is applied together with the structure of claim 1,
A guide protrusion is provided on the shaft member,
A vertical guide groove is provided on the inner peripheral surface of the embedded leg member,
A guide horizontal groove is provided by communicating with the guide vertical groove,
A key-like protrusion is provided on the bottom of the embedded leg member,
A key groove-shaped hole that can be fitted with the key-shaped protrusion is provided in the shaft member.
As a result of the cooperation of the simple structural parts, the guide function, stopper function, stopper release function, rotation locking function, and lock function necessary for the configuration of claim 1 can be achieved. It is possible to configure the fixing structure having a small size and low cost.

When the invention structure of claim 3 is applied together with the structure of claim 2,
With the sign post installed on the road surface, the shaft member can be slightly rotated with respect to the buried leg member while ensuring the effect that the shaft member of the sign post does not come off the buried leg member.
By utilizing such play of the rotation angle, there is a possibility to add an advanced structure such as a more solid state of the sign post.

When the invention structure of claim 4 is applied together with the structure of claim 3, the fitting state of the shaft member and the embedded leg member, and thus the setting state of the marker pillar on the road surface can be further strengthened.
The basic structure of the present invention is based on “shaft / hole pair fitting” between the shaft member and the cylindrical embedded leg member without using a screw member such as a bolt. However, if the ease of attachment / detachment is emphasized, “shaft / hole fitting” cannot be made very severe, and if “shaft / hole fitting” is made sweet, the installation state of the marker column becomes difficult.
Accordingly, by applying the structure of claim 4, it is possible to eliminate the play by the biasing force of the spring, and to strengthen the installation state of the sign post.

FIG. 1 is a schematic cross-sectional view showing an embodiment of the present invention, in which (B) shows a state where installation is completed, and (A) shows an intermediate process of installation operation.
First, in this paragraph, a configuration on which the present invention is premised will be described.
A columnar shaft member 18 is fixedly attached to the lower end of the marker column 1. The “cylindrical shape” described above is sufficient if the portion functioning as the fixing structure of the sign post is cylindrical, and the shape of the portion embedded in the main body of the sign post is not limited.
On the other hand, a bottomed cylindrical embedded leg member 19 is embedded in the road surface. The “cylindrical shape” described above is sufficient if it has a negative cylindrical inner peripheral surface, and the shape of the outer peripheral surface is not limited.

FIG. 1 shows a state where a sign post is installed on a horizontal road surface. For convenience of explanation, this state is used as a standard and is called up, down, vertical, horizontal, side, vertical, and horizontal.
In the present embodiment, the installation completion level E and the temporary stop level S are set with the lower end of the shaft member 18 as a guide at the design stage.
Since not all of the structure of this embodiment appears in FIG. 1, an outline of the configuration and operation will be described with reference to FIG.
A key protrusion 19 a is protruded from the bottom surface of the bottomed cylindrical embedded leg member 19. The shaft member 18 inserted into the embedded leg member is prevented from being inserted at the temporary stop level S.
The insertion operation up to the stop level is performed by lowering the shaft member 18 straight without rotating by a longitudinal guide mechanism described in detail later with reference to FIG. 2, and a stopper described in detail later with reference to FIG. The mechanism is temporarily stopped at the stop level S.

The shaft member 18 once inserted to the stop level S is guided by a rotation direction guide mechanism which will be described in detail later with reference to FIG. 3, and turns about 90 degrees to a state (B).
At this time, the shaft member 18 is allowed to descend by a stopper release mechanism that will be described in detail later with reference to FIG. 4 and is lowered to an installation completion level E, and by a rotation locking mechanism that will be described in detail later with reference to FIG. Rotation is prevented.
In the state shown in FIG. 3B, the shaft member 18 is locked out (raised) by a lock mechanism which will be described in detail later with reference to FIG.

An overview of the configuration and operation of this embodiment is shown below.
With reference to FIG. 2, the vertical guide mechanism will be described.
With reference to FIG. 3, the rotation direction guide mechanism and the lock mechanism will be described.
With reference to FIG. 4, a stopper mechanism, a rotation locking mechanism, and a stopper release mechanism will be described.
A mechanism in which these mechanisms cooperate to exert quick attachment / detachment and theft prevention effect will be described with reference to FIG.

FIG. 2 is an exploded perspective view schematically drawn by extracting the longitudinal direction guide mechanism (for the location of the components illustrated in FIG. 2 in the mechanism of the present invention, FIG. Please refer to Fig. 1 together).
A guide protrusion 18b is provided at the lower end of the shaft member 18, and protrudes laterally (in the radial direction of the cylindrical shaft member).
On the other hand, a guide vertical groove 19b that is slidably fitted to the guide protrusion 18b is formed on the inner peripheral surface of the embedded leg member 19 that is a cylindrical member.
With the above-described configuration, the shaft member 18 inserted into the embedded leg member 19 descends without rotating around the axis.
A horizontal guide lateral groove 19c communicating with the lower end of the guide vertical groove 19b is formed. This guide lateral groove will be described in detail in the next paragraph.

FIG. 3 is an exploded perspective view schematically showing the rotation direction guide mechanism and the lock mechanism (the components shown in FIG. 3 are the same as those shown in FIG. 2).
FIG. 3A shows a state in which the guide protrusion 18b faces the guide vertical groove 19b in order to insert the shaft member 18 into the embedded leg member 19.
FIG. 3B shows a state in which the guide protrusion 18b of the shaft member 18 has finished passing through the guide vertical groove 19b.
The guide protrusion 18b is in the guide lateral groove 19c.
The guide horizontal groove 19c has a shape in which the inner peripheral surface of the embedded leg member 19 is partially expanded, and guides the guide protrusion 18b that has passed through the guide vertical groove 19b in the horizontal direction.
As a result, the guide projection 18b, which has been pivoted around the axial center and has passed through the guide vertical groove 19b, is guided by the guide lateral groove 19c as shown in FIG.
The shape of the guide lateral groove 19c is such that the guide protrusion 18b cannot be rotated once. In this embodiment, the allowable rotation angle is 90 degrees.

FIG. 4 is an exploded perspective view schematically illustrating the stopper mechanism, the rotation locking mechanism, and the stopper releasing mechanism (the components illustrated in FIG. 4 are the above-described FIG. 2 and FIG. 4). 3).
For convenience of explanation, coordinate axes are assumed as shown. The Z axis is a vertical axis common to the shaft member 18 and the embedded leg member 19.
A key-shaped protrusion 19 a is provided on the bottom surface of the bottomed cylindrical embedded leg member 19. The XX axis is set in the longitudinal direction. Since the embedded leg member 19 is embedded in the road surface, the XX axis is a coordinate axis fixed with respect to the earth.
On the other hand, a key hole 18 a is provided on the lower end surface of the shaft member 18. The χ-χ axis is set in the longitudinal direction. Since the shaft member 18 is a movable member, the χ-χ axis is a movable coordinate axis perpendicular to the Z axis.
When the shaft member 18 rotates around the Z axis and the χ-χ axis coincides with the XX axis, the key protrusion 19a and the key hole 18a can be fitted. It cannot be fitted at other rotation angle positions.

FIG. 5 is a process diagram for explaining the operation of the present embodiment configured as described above.
The four figures arranged in the lower stage are cross-sectional views of the main part in a state in which the shaft member 18 is inserted into the embedded leg member 19, and the four figures arranged in the upper stage are the keys described in FIG. It is the top view which drew the correspondence of hole 18a and key projection 19a typically.
The lower part of FIG. 5 (A) shows the initial state in which the shaft member is inserted into the embedded leg member, as in FIG. 1 (A), and then (B) the lower part, (C). Go through the lower state. (D) The lower part depicts a state in which the installation is completed as in FIG.

In the process of FIG. 5A, the angular position of the shaft member 18 with respect to the embedded leg member 19 is regulated by the fitting of the guide protrusion 18b and the guide vertical groove 19b, and the shaft member 18 does not rotate. Down (longitudinal guidance function).
At the corner position thus restricted, the key hole 18a and the key protrusion 19a are orthogonal to each other as shown in the upper part of FIG. For this reason, the insertion operation of the shaft member 18 is temporarily stopped (stopper function).
As described above, once the shaft member 18 is lowered to the stop position, the guide protrusion 18b passes through the guide vertical groove 19b (see FIG. 5B) and enters the guide horizontal groove 19c, and the horizontal direction of the guide protrusion 18b. Directional movement (rotation of the shaft member 18) becomes possible (guidance function in the rotational direction).
(B) depicts a state in which the shaft member 18 is rotated about 45 degrees. As shown in the upper part, the key hole 18a and the key protrusion 19a intersect each other at about 45 degrees, so that they cannot be fitted, and therefore the shaft member 18 cannot be lowered, and at a stop level in the vertical direction once. At rest.
In the process depicted in FIG. (B), the guide protrusion 18b enters the guide vertical groove 19b.

When the shaft member 18 further rotates and reaches 90 degrees, the state shown in FIG. 5C is reached, and the key hole 18a and the key protrusion 19a are aligned and can be fitted as shown in the upper part thereof. That is, the shaft member 18 can be lowered (stopper release function).
The shaft member 18 descends by its own weight and enters the state shown in FIG. 5D, and the installation operation is completed.
In this state, since the key hole 18a and the key protrusion 19a are fitted, the rotation of the shaft member 18 is locked (rotation locking function).
In this state, since the key protrusion 19a is in the guide lateral groove 19c, as long as the shaft member 18 is in this angular position, the shaft member is prevented from moving upward (lock function).

If the steps (A) → (B) → (C) → (D) described above are followed, the sign post is installed quickly and easily, and if operated in the reverse order, the sign post is removed quickly and easily. .
However, without knowing this procedure, even if an attempt is made to pull out the sign post in the state of being installed as shown in FIG. (D), the sign post cannot be pulled out, preventing theft or mischief.

As can be understood from the configuration and function described above, the planar shape of the key hole and the key protrusion is not limited to a rectangle. In other words, it is only necessary that the key hole is not concentric with the shaft member.
FIG. 6 shows various embodiments. FIG. 6A shows a pair of a rectangular key hole and a key projection similar to the above embodiment, and the symbol O is an axis. In this example, when 90 degrees are turned from the illustrated state, they are fitted.
(B) is a pair of the square key protrusion 20a and the square key hole 20b, which fits when rotated 45 degrees from the state shown in the figure. (C) is a pair of the elliptical key protrusion 21a and the elliptical keyhole 21b, which fits when turned 90 degrees from the state shown in the figure.
(D) is a pair of a cylindrical protrusion 22a and a circular hole 22b arranged at an equal distance from the axis O. Similarly to (A), when 90 degrees are turned from the illustrated state, they are fitted.

In each example of FIGS. 6A, 6B, 6C, and 6D, when the hole and the protrusion are fitted, the rotation of the shaft member is fixedly locked.
FIG. 6E shows a modified example of FIG. 6D, and an arcuate long hole 22c is provided instead of the circular hole 22b. If comprised in this way, a play will be given to the rotation latching of a shaft member in the state which the hole and protrusion fitted. In this example, you can play corners.
In this way, if play is intentionally given to the pivotal locking of the shaft member, there is room for other contrivances as illustrated in FIG.

The embodiment shown in FIG. 7 is improved so that the mounting state of the shaft member is strengthened, and the portion illustrated in FIG. 7 is a chain line in the lower right corner of FIG. Corresponds to the circled part. This figure depicts the state where the installation of the sign post has been completed.
As shown in FIG. 7A, the plunger 24 is vertically disposed above the guide protrusion 18b and is urged by the coil spring 25 to press the guide protrusion 18b downward.
A stopper 18d is provided so that the plunger 24 does not fall off when the shaft member 18 is rotated and the guide projection 18b moves.

An bb cross-sectional arrow view shown in FIG.
When the guide projection 18b is moved downward as shown by the arrow R in the operation of mounting the shaft member 18,
The plunger 24 moves in the arrow L direction relative to the guide protrusion 18b. At this time, the slope 18c is formed so that the tip (lower end) of the plunger 24 rides on the guide projection 18b as indicated by an arrow u.
In order to be able to perform the above-described operation, the shaft member 18 lowered to the installation completion level is slightly rotated to require a play corresponding to the length G shown in FIG. When the shaft member 18 is completely fixed by the above-described operation, the above-described ride-up operation (arrow u) cannot be performed).
For this reason, as illustrated in FIG. 6 (E), play may be given to the fitting between the protrusion and the hole.
Consider how much play (gap size between the protrusion and the hole) is within the technical scope of the present invention.
In a mechanical structure, since almost all components are provided with tolerances, there is no patentability in providing play of a general tolerance. However, for example, when a gap of 10 times the general tolerance is provided, this is an intentional configuration and is understood to belong to the technical scope of the present invention.

It is a principal part vertical sectional view showing one embodiment of the structure of the present invention, (A) shows the state in the middle of installation, and (B) shows the state of installation completion, respectively. It is the disassembled perspective view which extracted and drawn the member which comprises the longitudinal direction guide mechanism in the said embodiment. It is the disassembled perspective view which extracted and drawn the member which comprises the guide mechanism and lock mechanism of a rotation direction in the said embodiment. It is the disassembled perspective view which extracted and drawn the member which comprises the stopper mechanism, the rotation latching mechanism, and the stopper cancellation | release mechanism in the said embodiment. It is process drawing which shows the installation operation of the marker pillar in the said embodiment, (A) is an initial process, (B) is an intermediate process, (C) is a process immediately before completion of installation, (D) is Each of the completed installations is depicted. It is the top view which drawn typically five examples of the relationship between the protrusion in this invention, and a hole. It is principal part sectional drawing of the example of improvement of embodiment shown in above-mentioned FIG. It is the front view which fractured | ruptured two examples of the fixation structure for installing the marker pillar of a prior art example partially, and was drawn. It is explanatory drawing of the fixation structure of the marker pillar in a well-known invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Marking pillar 1a ... Main body 1b ... Base 1c ... Reflection sheet 2 ... Integrated bolt 3b ... Base 4b ... Storage pipe 5 ... Buried leg 6 ... Road surface 7 ... Adhesive 10a, 10b ... Mounting hole 11 ... Road surface 12 ... Recessed part DESCRIPTION OF SYMBOLS 13 ... Engagement hole 14 ... Circular hole part 15 ... Elongate hole part 16 ... Separate bolt 17 ... Disc 18 ... Shaft member 18a ... Key hole 18b ... Guide protrusion 18c ... Slope 19 ... Embedded leg member 19a ... Key protrusion 19b ... Guide longitudinal groove 19c ... Guide lateral groove 20a ... Square key protrusion 20b ... Square key hole 21a ... Oval key protrusion 21b ... Oval key hole 22a ... Cylindrical protrusion 22b ... Circular hole 23a ... Cylindrical protrusion 23b ... Arc-shaped slot 24 ... plunger 25 ... coil spring

Claims (4)

In the structure in which the columnar shaft member provided at the lower end of the sign post is inserted and fixed downward into the bottomed cylindrical embedded leg member embedded in the road surface,
As for the insertion position of the shaft member, assuming an installation completion level and a temporary stop level located above the installation completion level,
A longitudinal guide mechanism that guides the shaft member inserted into the bottomed cylindrical embedded leg member to a stop level once without rotating it;
A stopper mechanism for temporarily stopping the shaft member inserted downward into the embedded leg member at a stop level;
A rotation direction guide mechanism that allows rotation of the shaft member that has once reached the stop level;
Once the shaft member once inserted to the stop level and stopped is rotated by a predetermined angle, a stopper release mechanism that releases the temporary stop in the insertion direction and allows insertion to the installation completion level,
A rotation locking mechanism that locks the shaft member inserted to the installation completion level so that it cannot rotate at the installation completion level;
A locking mechanism that prevents the shaft-like member in a state in which the rotation is locked by the rotation locking mechanism from being pulled out upward at the rotation angle position;
A structure for fixing a sign post characterized by comprising: A guide protrusion protrudes in the radial direction of the shaft from the vicinity of the lower end of the shaft member to the side,
A vertical guide groove is formed on the inner peripheral surface of the embedded leg member, and the vertical guide mechanism is configured by the cooperation of the guide vertical groove and the guide protrusion,
A guide transverse groove having a shape in which the inner peripheral surface of the embedded leg member is partially expanded is formed in communication with the guide longitudinal groove, and the rotation direction is increased by the cooperation of the guide transverse groove and the guide projection. A guide mechanism is configured,
A key-shaped protrusion having a height corresponding to a stop level is once formed on the bottom surface of the bottomed cylindrical embedded leg member, and the key protrusion and the lower end surface of the shaft member are in contact with each other as described above. A stopper mechanism is configured,
A key groove-shaped hole having a shape that can be fitted to the key-shaped protrusion is formed on a lower end surface of the shaft member, and the stopper releasing mechanism is formed by the cooperation of the key-shaped hole and the key-shaped protrusion. And the rotation locking mechanism is configured,
The sign post fixing structure according to claim 1, wherein the locking mechanism is constituted by the guide protrusion and the guide lateral groove. When the key-like projection formed on the embedded leg member that is a stationary member is fitted with the key groove-like hole of the shaft member that is the movable member, and the rotation locking mechanism is acting,
A play angle that allows the shaft member to rotate with respect to the embedded leg member is provided, and a gap dimension that provides the play angle is 10 times or more of a general tolerance in the design drawing of the marker column. The fixing structure of the marker pillar according to claim 2. In a state where the key hole of the shaft member is fitted to the key protrusion formed on the embedded leg member,
The plunger that abuts on the upper surface of the guide protrusion and a coil spring that presses the plunger downward to press the guide protrusion are provided on the embedded leg member. Sign post fixing structure.

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