JPH0738813Y2 - Survey pile - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a survey pile in which the head of the pile main body is capped with a synthetic resin cap, particularly a survey pile driven into the soil. The present invention relates to a survey pile that can be attached with a display board on which symbols and the like are written.

(Prior Art) Conventionally, survey piles made of wood, concrete, metal, and synthetic resin have been used. Above all, the survey pile made of synthetic resin is
Since it is light, strong and does not decay, it has been widely used recently for boundary marking and surveying in mountainous areas and fields. In such a survey pile, a cap made of synthetic resin colored with red, blue or the like is capped on the head of a rod-shaped body having a sharp tip. When entering numbers and symbols on these survey piles, the numbers and symbols were usually entered on the side surface of the cap with paint etc. after driving the survey pile into the soil.

(Problems to be solved by the invention) However, it is very troublesome to fill in the numbers and symbols with paint etc. after driving the survey piles into the soil, and the surroundings of the survey piles when entering the numbers and symbols. Was contaminated with paint.

Furthermore, there was a problem that the paint was peeled off and the numbers and symbols disappeared.

Therefore, the object of the present invention is to solve the above-mentioned problems and provide a surveying pile in which a metal indicating plate on which a number or a symbol has been previously written can be easily attached to the cap after the surveying pile is driven into the soil. That is.

(Means for Solving Problems) That is, the present invention provides a circular concave portion having a downwardly tapered peripheral wall at the center of a synthetic resin cap capped on the head of a pile body. In addition, a center hole for establishing a measurement point is formed at the center of the circular recess, and
In the surveying stake, an annular metal display plate having a symbol written on the surface is fitted in the circular recess.

(Operation) According to the present invention, since the metal display plate on which the number and the symbol are written is fitted into the recess provided on the head of the synthetic resin cap, the survey pile driven into the soil. You can definitely install the metal display board in order. Further, the metal display plate is fitted in the recess provided in the cap and therefore does not come off.

(Embodiment) Next, an embodiment of the survey pile of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a survey pile of the present invention. The survey pile includes a pile body 1 having a sharp tip, a cap 2 made of synthetic resin capped on the head of the pile body, and the cap. The display panel 3 is made of metal and is fitted in the provided circular recess.

The pile body 1 is usually made of synthetic resin. The material used for such a synthetic resin pile body is polyethylene,
Thermoplastic synthetic resins such as polypropylene, polyester, styrene, polyamide, and polysulfone are mainly used alone or in a mixture.

The head of the pile body 1 has polyethylene, polypropylene,
A cap 2 made of a thermoplastic resin such as fluorine, polycarbonate, polysulfone or polyester, or a thermosetting resin such as phenol or polyimide is capped. The cap 2 is usually attached to the head of a preformed pile main body 1. Although it is fixed with an adhesive or the like, the cap may be put in a mold at the time of molding the pile main body and the cap may be heat-sealed to the pile main body at the time of molding the pile main body. As shown in FIG. 2, the cap 2 is provided with a circular recess 4 at the center of its upper surface, and a center hole 5 is bored at the center of the recess. As shown in the cross-sectional view of FIG. 3, the circular recess has a peripheral wall which forms an inverse taper downward. The reverse tapered peripheral wall prevents the metal display plate fitted in the circular recess from coming off the circular recess. At the center of the circular recess, a diameter of about 2 to 5 mm is established to determine the measuring point.
A central hole 5 is formed. 6 is a ventilation hole.

The metallic display plate 3 fitted in the circular concave portion 4 provided in the cap 2 has the same shape as the circular concave portion 4 provided on the upper surface of the cap as shown in FIG. The size is 0.3 to 1.0 mm smaller than the size of the circular recess. This is because when the cap is capped on the head of the pile main body, the upper surface of the cap contracts to some extent, so that the circular concave portion and the metal display plate have substantially the same size at the time of contraction. Further, when the metal display plate 3 is fitted in the circular recess 4 formed in the cap at the center of the display plate, the diameter is about 2 to 5 mm which engages with the central hole 5 provided in the circular recess. Has a through hole 7 and has an annular shape. The metal display plate 3 is made of a material having corrosion resistance, for example, a thin metal plate (usually 0.1 to 1.0 mm in thickness) such as aluminum or stainless steel. The surface of the metal plate is engraved with numbers and symbols. As shown in FIG. 5, one end of the metal display plate 3 is brought into contact with the bottom surface and the tapered surface of the circular recess, and the other end is pushed down into the circular recess, as shown in FIG. As shown, it can be securely fitted into the circular recess. In order to further secure the fitting of the metal display plate in the circular recess, an adhesive may be applied to the back surface of the metal display plate and adhered to the bottom of the circular recess.

(Effect of the invention) As described above, the survey pile of the present invention is sequentially fitted into the circular concave portion provided on the upper surface of the cap of the survey pile in which the metal display plate having the number or symbol engraved in advance is driven into the soil. By doing so, the metal display board can be surely and surely attached without fail, and it is particularly suitable as a survey pile for a numerical method for sequentially numbering.

[Brief description of drawings]

FIG. 1 is a perspective view of a survey pile of the present invention, FIG. 2 is a perspective view of a cap, FIG. 3 is a sectional view of the cap, FIG. 4 is a perspective view of a metal display board, and FIGS. FIG. 6 is a cross-sectional view showing a method of fitting a metal display plate into a circular recess provided in the cap. 1 ... Pile body, 2 ... Cap 3 ... Metal display board, 4 ... Circular recess 5 ... Center hole, 7 ... Through hole

Claims (1)

[Scope of utility model registration request] 1. A circular concave portion having a downwardly tapered peripheral wall is provided at the center of a synthetic resin cap capped on the head of a pile body, and the circular concave portion is formed at the center of the circular concave portion. A survey pile, characterized in that a center hole for establishing a measurement point is bored, and an annular metal display plate having a symbol on its surface is fitted in the circular recess.