JPS6120542Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for exploring underground objects.

In cities, there are old water and sewage pipes under the roads.
Gas pipes, cables, etc. are buried in a complicated manner.
Records of burial locations are often unclear.

Therefore, it is necessary to confirm the location of the buried object before driving sheet piles or mechanical excavation. Conventionally, the direct exploration method of driving a steel rod into the ground and checking the difference in resistance, and the magnetic field using induced current are used. Indirect exploration methods such as exploration equipment are being used.

However, since the direct exploration method involves confirmation based on the worker's hand responses, it is labor-intensive, does not allow exploration of vertical ground or deep areas, and is time-consuming.

Indirect exploration methods also have the disadvantage that only metals can be confirmed, there is a limit to the depth, and the measured values are unreliable when a large number of buried objects are mixed together.

The present invention is aimed at improving such conventional methods.

<1> A device that does not require heavy labor on the part of the operator as in the conventional direct exploration method, and does not require expensive and complicated equipment to handle as in the indirect exploration method.

<2> A device that can detect the presence of buried objects, not only when they are metal but also when they are concrete pipes, PVC pipes, clay pipes, etc.

<3> A device that can determine the material quality to a certain extent without damaging buried objects.

Next, an example will be described.

The device of this invention is hollow auger 1 and exploration rod 2.
Consisted of.

The hollow auger 1 is constructed by attaching auger blades 12 to the outer periphery of a prismatic hollow cylinder 11.

It is not necessary to attach the blade 12 to the outer periphery of the hollow cylinder 11 by twisting it many times, and the purpose can be achieved by attaching it by twisting it at least once.

The hollow cylinder 11 may be polygonal, oval, or egg-shaped unless it has a circular cross section, and the key is to transmit the rotation of the rod 2 inserted into the hollow cylinder 11 so that it can slide freely in the axial direction. It is sufficient if it is configured.

On the other hand, the exploration rod 2 has an end pin 21 at its tip, and a handle 2 at the base end in a direction perpendicular to the rod axis.
It is a rod-shaped body having a deformed column 23 having a polygonal, oval, etc. cross section at the lower part thereof.

The deformable column 23 is inserted into the hollow cylinder 11 of the hollow auger 1 described above, and its length l ₂ is longer than the length l ₁ of the hollow auger 1 .

The outer diameter of the deformable column 23 is configured close to the inner diameter of the hollow cylinder 11, and the deformable column 23 cannot rotate freely with respect to the other.
3 is rotated, the rotation is transmitted to the hollow auger 1.

Therefore, the cross-sectional shape of the deformed column 23 and the cross-sectional shape of the hollow cylinder 11 are similar, and the cross-sectional shape of the deformed column 23 maintains the same shape over the entire length _l2 .

The outer diameter of the end pin 21 is larger than the inner diameter of the hollow tube 11, so that the hollow tube 11 will not come off the tip of the rod even if the probe rod 2 is vertically held.

Further, the exploration rod 2 is provided with a joint portion in a portion other than the deformable column 23, so that it can be sequentially connected and extended.

For the structure of the joint part, a wide variety of known connection methods can be used.

Next, how to use it will be explained.

<1> Press fit. (Fig. 2) When the handle 22 is rotated, the rotation of the probe rod 2 is transmitted to the hollow cylinder 11 via the deformation column 23.
The blades 12 are pushed into the ground like screwing in a wood screw.

At this time, the surrounding earth and sand are not discharged,
Therefore, only the blades 12 and the hollow tube 11 cut into the soil and enter the soil, leaving the earth and sand without drilling.

Therefore, even if it goes deep into the soil, the resistance to the rotation of the blade 12 does not increase much, and the hollow cylinder 11 can be advanced to a sufficient depth by input, and as the hollow cylinder 11 enters, the probe rod 2
It also goes underground.

<2> Pull up once. (Figure 3) When you feel that the pin 21 at the tip of the probe rod 2 has come into contact with a foreign object such as the buried object 3, turn the handle 22 in the opposite direction.

Then, the hollow cylinder 11 rises as the exploration rod 2 rises.

As a result, a stroke for moving the probe rod 2 up and down can be obtained.

<3> Exploration In the area where the hollow cylinder 11 has risen, the earth and sand, especially at the center position, has been loosened to some extent, so even when the exploration rod 2 is pulled up, only slight resistance is applied to the rod and the tip pin 21, making it easy to move up and down. be able to.

Therefore, by holding the handle 22 and moving the tip pin 21 up and down, the material can be estimated from the degree of contact, the difference in resistance, and the degree of rebound using delicate human senses.

Since this operation is performed by input, the strength of the impact can be easily adjusted and the surface of the buried object will not be damaged.

As mentioned above, the present invention involves inserting the non-circular columnar part of the exploration rod into a hollow cylinder with an auger blade attached to the outer periphery and a non-circular cross section.The rotation of the rod is transmitted to the hollow cylinder, but the vertical movement of the rod is is configured so that it is not transmitted.

Therefore, the following effects can be expected.

<1> With a simple combination of an auger section and an exploration rod, manual exploration to deep areas is possible.

<2> Since it is based on human senses, the buried object will not be damaged, and the material of the buried object can be determined to some extent by resistance and rebound.

〈3〉 Since the blades only cut in the hole instead of removing the soil with an auger and drilling the hole, the resistance when screwing in deep is not so great.

[Brief explanation of the drawing]

Figure 1: Side view of one embodiment of the present invention, parts 2 to 4
Figure: Explanatory diagram of exploration work. 1: Hollow auger, 11: Hollow tube, 12: Blade, 2: Exploration rod, 23: Deformed column.

Claims (1)

[Claim for Utility Model Registration] A non-circular columnar part of a probe rod is inserted into a hollow tube with an auger blade attached to the outer periphery and a non-circular cross section, and the rotation of the probe rod is transmitted to the hollow tube, but the rotation of the probe rod is transmitted to the hollow tube. A buried object detection device configured so that vertical motion is not transmitted to the hollow cylinder.