JPH069300Y2 - Marking pile made of plastic - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is a plastic used to indicate a survey or a land boundary line, etc., which is covered with a marker cap for indicating a measuring point on a prismatic head. It is related to the marking piles made of steel.

(Prior Art) Recently, in place of wooden or concrete marking piles, plastic marking piles having high impact strength and not decaying are widely used.

As such a plastic marking pile, a square pillar-shaped marking pile is generally used, which is capped with a marking cap having a head on which a cross mark as a direction indicator is engraved.

(Problems to be solved by the invention) However, if the conventional square pillar-shaped marking pile is driven into the soil with extreme caution, the marking pile will be twisted during driving and the marker mark engraved on the marker cap. However, there is an inconvenience that the pointing direction of is shifted from the predetermined direction. In addition, since the square pillar-shaped marking piles use a large amount of plastic, it is inevitable to increase the cost, and it is heavy and inconvenient to carry.

Therefore, an object of the present invention is to provide a marking pile that can be buried in the soil in a state where the pointing direction of the index mark engraved on the marking cap is surely pointed in a predetermined direction.

A further object of the present invention is to provide a lightweight and inexpensive marking pile having impact strength equal to or higher than that of a conventional square pole marking pile.

(Means for Solving the Problem) That is, according to the present invention, a cylindrical first embedding portion is provided below a prismatic head covered with a marker cap via a slope, and the head is small. Along with extending the reinforcing piece from the four corners along the side wall of the first embedded portion, below the first embedded portion, at a length of 1/2 or less of the length of the first embedded portion,
The plastic marking pile is characterized in that a cylindrical second embedded portion having a sharp tip is provided.

(Operation) The plastic marking pile of the present invention is driven up to the cylindrical second embedded portion having a sharp tip when driven,
In this state, the indicator pile is twisted to point the indicator mark of the marker cap in a predetermined direction, and then the indicator pile is driven up to the cylindrical first embedding portion having the reinforcing piece, and the indicator pile is provided in the second embedding portion. Due to the presence of at least four reinforcing pieces, the marking piles sink straight without being twisted, and the index marks engraved on the cap are accurately pointed in the specified direction, and are sunk in the soil. Can be buried. Further, since the buried portion has a columnar shape, the amount of plastic used is smaller than that of the marking pile having a quadrangular buried portion, and a lightweight and inexpensive marking pile can be provided. Further, the marking pile of the present invention has an impact strength equal to or higher than the rectangular marking pile due to at least four reinforcing pieces provided in the first buried portion.

(Example) Next, one example of a plastic marking pile of the present invention will be described with reference to the drawings. As shown in FIG. 1, a columnar first embedding portion 2 is provided below a prismatic head portion 1 capped with a marking cap 4, and a sharp tip is provided below the first embedding portion 2. A cylindrical second buried portion 3 having a portion 7 is provided.
On the side wall of the cylindrical first embedded portion, four reinforcing pieces 5 are provided extending to the lower end. The reinforcing pieces 5 extend downwardly from the four corners of the lower end of the prismatic head 1 along the side wall of the cylinder. In order to make it easier to drive the first buried portion 2 into the soil and to make it difficult to remove the marking pile driven into the soil, the reinforcing piece 5 is made of the reinforcing piece on the head side of the marking pile as shown in FIG. It is preferable to lower the protruding height of the reinforcing piece on the tip side as compared with the protruding height. Usually, it is preferable that the protrusion height of the reinforcing piece 5 on the head side is 1.0 to 3 cm, and that the tip side is 1/2 to 1/3 of the protrusion height. It is preferable that the reinforcing piece 5 be manufactured by extrusion molding if the cross section is gradually reduced from the lower part to the upper part. The reinforcing pieces may be four pieces as shown in FIG. 1 or a second reinforcing piece 5'may be provided at an intermediate position between adjacent reinforcing pieces as shown in FIG. Such a second
The reinforcing piece 5'of is lower than the protruding height of the reinforcing piece 5 extending downward from the four corners of the head. For example, it is preferable that the height is 1/2 to 1/3 of the reinforcing piece 5. A slope 6 is usually formed at the boundary between the first buried portion 2 and the head 1.

Below the first embedded portion 2, a cylindrical second embedded portion 3 having a sharp tip 7 is integrally provided. The length of the second buried portion 3 is appropriately selected depending on the condition of the land where the marking pile is driven. For example, it is preferable to lengthen the second embedding portion 3 on a hard land, and to shorten the second embedding portion 3 on a soft land. Usually, it is appropriate that the second buried portion 3 has a length of 1/2 or less of the length of the first buried portion 2. Further, the tip portion 7 of the second embedded portion 2 may have a conical shape, or may be sharpened by taking a triangle or a square. Second
It is preferable to form the tip portion 7 into a conical shape in order to easily twist the marking pile driven into the soil up to the embedding portion, but since the second embedding portion 3 has a columnar shape, the tip portion has a pyramidal shape. There is no problem in twisting the marking pile even if it is formed in the.

As shown in FIG. 3, when the recess 8 is formed on the side wall of the head of the marking pile, the amount of plastic used can be further reduced, and the weight and cost can be further reduced.

In the marking pile of the present invention, first, as shown in FIG. 4, the head 1 is hammered into the soil to the second buried portion 3 having a cylindrical shape, and the head 1 is twisted in this state to twist the head. The index mark engraved on the marker cap 4 capped on the is pointed in a predetermined direction. Next, as shown in FIG. 5, with the index mark pointing in a predetermined direction, the head 1 of the marking pile is further hammered in and the first embedding portion 2 is driven into the soil. Due to the presence of at least four reinforcing pieces projecting on the peripheral wall of, the marking pile is driven vertically into the soil without twisting.

(Effects of the Invention) As described above, the marking pile according to the present invention has a cylindrical first embedding portion having a head and a reinforcing piece below the head, and a sharper point below the first embedding portion. By providing the cylindrical second buried portion having a different tip, as described above, the marking pile is driven into the soil until the second buried portion is twisted, and the marking pile is twisted to cover the head. When the index mark engraved on the cap is pointed in a predetermined direction and then the first buried portion is driven into the soil, the reinforcing piece provided in the first buried portion twists the marking pile at the time of driving. The phenomenon is prevented and it can be embedded vertically. In addition, the marking pile of the present invention can be extruded from plastic, the amount of plastic used is small, the weight can be reduced, and the marking pile can be manufactured at low cost.

[Brief description of drawings]

1 to 3 are perspective views of the marking pile of the present invention, and FIG.
FIG. 5 to FIG. 5 are explanatory views showing the sequence of driving the marking pile of the present invention into the soil. 1 ... Head part, 2 ... First embedded part 3 ... Second embedded part, 4 ... Marker cap 5 ... Reinforcing piece, 6 ... Slope 7 ... Recessed part

Claims (1)

[Scope of utility model registration request] 1. A columnar first embedded portion is provided below a prismatic head capped with a marker cap with an inclined surface, and a side wall of the first embedded portion from at least four corners of the head. A reinforcing piece extending along the first embedding portion, and a columnar shape below the first embedding portion having a sharp tip portion with a length of 1/2 or less of the length of the first embedding portion. A plastic marking pile having a second buried portion.