JPS59570Y2 - Adapter for measuring point studs - Google Patents

Description

[Detailed explanation of the invention] This invention is a new method for measuring point silver (commonly known as concrete nail), which is used to fix the position semi-permanently by driving it into the measuring point set on the road surface etc. You will get a suitable adapter.

As shown in Figs. 1 and 2, the same type of measuring point silver is formed so that a head portion 1 and a shank portion 2 form a nail or iron shape, and the upper surface of the head portion 1
A device having a cross-shaped slit 1b on a is known.

These types of measuring points are usually not handled alone, but are marked by color in the diagram to indicate what they are for (water supply, gas work, boundary setting, etc.). It is used by being attached to a conical point marking washer as shown by reference numeral 3.

Therefore, under such usage conditions, the height of the washer 3 and the amount of protrusion of the head portion 1 of the measuring point silver relative to the washer, for example, if a washer with a recess 3a in the center is used, the head portion The above-mentioned measuring point silver will protrude from the road surface X etc. by a height equal to the thickness of 1 minus the depth of the recess 3a, but the above-mentioned washer 3 will be removed due to long-term use. It is often seen that only the above-mentioned measurement points are relatively high and protrude.

On the other hand, since this type of measuring point has the function of setting survey standards according to its original purpose, it is necessary to set a surveying pole etc. on the measuring point during actual surveying. , in the conventional form as shown in the figure, the two cross-shaped slits Hb on the head portion 1 allow the pole to be placed directly on the upper surface 1a of the head portion 1 and stably. It cannot be set in the state.

In view of the above-mentioned points, this invention was developed for measuring point silver driven into road surfaces, etc., which consists of a head part having a measuring point on the top surface and a shank part, as illustrated in Figures 3 to 6. , an adapter for coaxially positioning a surveying pole or a surveying reflection mirror on the measuring point, the bottom side of which is provided with a concave groove that matches the head portion of the measuring point. , on the top surface side, an inverted conical recess for seating the stone protrusion of the surveying pole and coaxially supporting the surveying pole to the surveying point; and legs of the surveying reflective mirror. a cylindrical part for seating the lower end opening of the body and coaxially supporting the surveying reflecting mirror at the measuring point;
This is an adapter for measuring point iron having a structure in which a center hole is provided that penetrates between an inverted conical recess provided on the top surface side and a groove provided on the bottom surface side.

By using a survey point iron adapter with such a structure, the survey pole 3 can be directly attached to the center of the above survey point iron.
By supporting the poles via adapters such as those described above, the poles can be installed on predetermined measurement points in exact alignment.

Hereinafter, to explain a specific example, the adapter shown in FIG. The inverted conical recess 24 of the funnel-shaped portion 20 is coaxial with the concave groove 11 of the main body 10, and is assembled to the main body 10, which is provided in a truncated conical shape, by, for example, a threaded connection 26. , the legs 10 (
It has a cylindrical surface 25 for fitting the lower end opening 41 (see FIG. 4), and when the funnel-shaped portion 20 and the main body 10 are combined, the two members can be opened from above to below. It has a structure in which a center hole 13 is provided in the center of the inverted conical recess 24 of the former and the groove 11 of the latter so that it can be seen through.

On the other hand, the adapter shown in FIGS. 4 and 5 has a bottom shape similar to that shown in FIG. In the embodiment of FIG. 4, instead of being configured separately from the main body 10,
A cylindrical part having a cylindrical surface 15 corresponding to the cylindrical surface 25 in FIG. In the embodiment shown in FIG. 5, the lower end peripheral edge of the cylindrical portion in FIG.
That is, the main body 10 is formed into a truncated conical shape by a generatrix that starts from the edge 15' at the lower end of the cylindrical surface 15 and widens toward the end, and a similar inverted conical recess is provided in the cylindrical portion and the main body. This structure allows the surveying pole 3 shown by the tentative line in Figure 3 to be
Both of the legs 40 of the above-mentioned reflecting mirror shown in FIGS. 1 and 4 can be selectively supported.

For such an adapter, there is also a groove 11.
A flat annular surface 12 is provided at the peripheral edge of the washer 3 according to the area of the upper surface 3b of the measuring point marking washer 3 used with the measuring point silver. It is possible to apply the measuring point silver head part 1 to the concave groove 11 at the bottom of the adapter of this invention at the same time.
At the periphery, the upper surface of the washer is brought into contact with the corresponding annular surface 12, making it possible to further stabilize the installation state of the entire adapter relative to the measuring point.

In addition, when the above-mentioned annular surface 12 is implemented, even when the above-mentioned washer 3 is not actually present as shown in FIG. If you lay it down, it will help support the entire adapter.

As mentioned above, this invention uses the concave groove at the bottom of the main body fitted into the head of a general measuring point silver which is driven into the road surface, etc. The inverted conical recess allows the lower end of a surveying pole, etc. (stone end part) to be seated and coaxially supported. When the lower end of the surveying pole is directly installed in the
This not only avoids the deterioration in surveying accuracy due to the fact that the pole is often off-center, but also eliminates the trouble of using a tripod or other fixing means to fix the surveying pole, which would otherwise be required. Moreover, by using the inverted conical recess, the lower end of the surveying pole can be placed in a sufficiently stable state and accurately aligned with the existing survey point, etc. A simple configuration can bring about great practical effects.

[Brief explanation of the drawings] Fig. 1 is a plan view showing a general measuring point marker and a measuring point marking washer used in conjunction with it, Fig. 2 is a side view thereof, and Fig. 3 is a measuring point marker according to this invention. A partially sectional side view showing an embodiment of the adapter for point iron, FIGS. 4 and 5 are the same views showing modifications of the adapter, and FIG. 6 is a side view of the adapter shown in FIGS. 3 and 4. It is a bottom view. 1...Head part, 2...Shank part, 10...
・Main body, 11... Concave groove, 14... Inverted conical recess, 3
0...Surveying pole, 31...Lower end portion.

Claims (1)

[Scope of utility model registration request] For the survey point silver that is driven into the road surface, etc., which consists of a head part with a survey point on the top surface and a shank part, a surveying pole or (J surveying reflective mirror) is placed on the survey point silver. The adapter is for coaxial positioning, and the bottom side is provided with a concave groove that matches the head part of the surveying point silver, and the top side is provided with a concave groove that matches the head part of the surveying pole, and the surveying pole is seated on the top side. An inverted conical recess coaxially supports the surveying pole at the measuring point of the surveying point, and a lower end opening of the leg of the surveying reflecting mirror is seated, and the surveying reflecting mirror is placed on the surveying point of the measuring point. A measuring point characterized in that a cylindrical part is provided that coaxially supports the point, and a center hole is provided that penetrates between the inverted conical recess provided on the top surface side and the groove provided on the bottom surface side. chain side adapter