JP3158146B2 - Ground drilling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for digging a foundation ground for construction or the like very easily and reliably, and for forming a pile hole for pile driving in which the peripheral wall of the hole is firmly clamped by using a compaction rod. The present invention relates to a ground excavation device for foundation ground whose main purpose is to perform excavation.

[0002]

2. Description of the Related Art As a shape of a ground excavation device for excavating a foundation ground such as a building, most of the structures have a structure in which an auger head for integrally forming a screw below an auger shaft is continuously provided, or a total length of the auger shaft. The drill has a structure in which a screw hole is provided over the ground, and a drill hole of a predetermined diameter is excavated in the ground by the rotating action of a screw auger that follows the excavation blade when excavating the ground. In addition, the wall of the excavation hole is destroyed, and the excavated debris has a disadvantage that the excavated soil is deposited on the ground, and it is difficult to discharge the excavated soil.

[0003]

In view of such a problem, the inventor of the present invention has previously proposed a plurality of pressing rods A. on an auger head B as shown in FIG. A. A ground excavation device (Patent No. 2514596) in which A is radially arranged around the auger 1 as an axis has been developed, and its effects have been praised in the industry. That is,
At the same time as one rotation of the auger shaft, the clamping rods A, A, A arranged on the outer periphery rotate in a fixed direction (arrows), and the rotation causes the surfaces of the clamping rods to intermittently and intermittently compress the wall surface of the drilling hole. Excavation is intended to securely and easily consolidate the excavated gravels to the hole wall surface while repeating the action of tightening and tapping, and to easily and easily construct a pile hole whose hole wall surface is firmly fastened in the ground. Most of the rubble was able to create a construction ground with a strong bearing capacity underground without discharging the earth without being lifted to the ground by pressing the peripheral wall of the hole. However, in the above-described apparatus, a beautiful pile hole in which the wall surface of the excavation hole is firmly clamped can be formed, but at the time of excavation, each of the compression rods A, A,
A considerable load and frictional resistance were generated on the surface A, the degree of wear was large, and it was finally found that there was a serious drawback that the construction could not be continued without replacing the entire device due to breakage or the like.

[0004]

SUMMARY OF THE INVENTION The main object of the present invention is to supplement the above-mentioned drawbacks, and the outline of the present invention will be described with reference to the drawings. And several support rods 5,
The support rods 5,5,5 are arranged radially through respective bearing arms 6.6.6 in an appropriate shape such as a triangle or a pentagon, and are provided on the outer periphery of the support rods 5,5,5. and Oh the compaction roller 7, 7, 7 of thinner than the diameter at the large-diameter dimensions
A plurality of them are freely fitted in a freely rotating and replaceable manner in the g- axis direction.
Its features are its structure. Thus conventional如even when compacting roller 7 to event during ground Juana is worn or damaged
It is the may be to continue the desired working by simply replacing only the compaction roller 7 causes the wear without replacing the entire Ku device. In addition, the shaft diameter, length, and the like of the roller 7 can be changed and selected each time according to the ground to be excavated, and the ground can be excavated more effectively.

[0005]

Next, a description will be given of an example of construction using the apparatus. First, when the apparatus is set on a predetermined ground and the auger shaft 1 is driven to rotate, the excavating blade 3 at the tip of the auger head 4 rotates and excavates while disturbing the ground at the tip. At the same time, the excavated soil in the ground is pushed upward by the rotating action of the screw 2 and excavated in the ground. At the same time as the rotary excavation by the auger head 4, the support rods 5, 5, 5 rotate in the direction of the arrow A, and the rolling rollers 7, 7, 7, which are loosely fitted to the support rods 5, 5, 5, respectively. Rolling in the direction of the arrow B, the rolling surface of the pressure roller 7 rolls the hole wall to be drilled first, the action of tapping is continuously repeated, and the hole peripheral wall is pressed firmly into the ground while digging in the ground. It is possible to reliably and easily make the drilled hole. Meanwhile, as in the previous invention, the spring water from the periphery of the hole is guided into the space C between the support rods 5, 5, and 5 to prevent overflow and muddy formation in the hole. Further, the air staying in the hole is naturally discharged to the ground through the space C, and thus the wall surface of the hole may be destroyed due to the suction force generated when the rod is pulled out, not only during the work. Can be stopped.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. Reference numeral 1 denotes an auger shaft having an appropriate length. Auger head 4 integrally provided with screw blade piece 2 having blade width b
Are connected and connected. Also, several bearing arms 6.6.6 are radially extended on the auger shaft 1 and the supporting rods 5, 5, 5 are integrally connected to and supported on the respective distal ends. Further, the support rods 5, 5, and 5 are arranged in a triangular or pentagonal polygonal shape around the auger shaft 1 so as to form a space C therein. Roller rollers 7, 7, 7 having a diameter larger than that of the support rod 5 are loosely fitted to the portion so as to be rotatable and detachable. Further, it is also possible to provide an uneven strip on the surface of the roller so that the surplus soil is removed, the hard soil is crushed, and the fastening action is made more effective.

Further, as another embodiment, a roller having a larger or smaller shaft diameter of the pressure roller 7 in accordance with the ground such as hard and soft, and a roller having a thin and thick wall thickness or a short and long dimension of the entire length are provided on arbitrary supporting rods 5, 5, and 5. An effective pile hole adapted to the excavated ground, which can be freely inserted and replaced, can be dug.

It is noted that the outer peripheral rotation trajectory a of each of the compaction rollers 7, 7, 7 is arranged to be substantially the same diameter or slightly larger in diameter than the blade width b of the screw blade piece 2 of the lower auger head 4. pay attention to. In the drawing, reference numeral 8 denotes a joint, and 9 denotes a mortar infusion tube.

[0009]

As described above, the ground excavation apparatus according to the present invention has several bearing arms 6.6.6 radially disposed on the auger head 4 with the auger shaft 1 as an axis, as described above. the support rod 5,5,5 and supported in a triangular or pentagonal, etc., the support rod further to each support rod 5, 5, 5
Rollers 5, 7, which are larger in diameter and thinner than
Rotate a plurality of 7, 7 in the auger axis direction and play freely
Since it has a fitted configuration, it does not merely excavate the ground, but simultaneously rotates the auger shaft one time with each of the compaction rollers 7,
7, 7 also rotate, and the wall of the excavation hole is positively and alternately pressed and alternately pressed, beaten, pressed, and beaten repeatedly on the roller rotation surface to firmly consolidate the debris in the hole to the peripheral wall of the hole. it is the may be to determine reliably easily Juana without strong prison of Kuiana of such loss of shape and.
Particularly, in the present invention, unlike the direct clamping by the clamping rod A of the previous invention, the frictional resistance is very small because of the rotational compression by the rotating rods, that is, by the rolling, so that the wear damage is hardly caused. It has an economic effect that it can be used semi-permanently. Also, the rolling rod 7
However, even if a situation such as wear or loss occurs, the same device as the original device can be reused by simply removing and replacing only the pressure roller 7 having wear and damage without inconvenience such as replacing the entire device as in the prior art. And so on. Further, similarly to the previous invention, the formation of the space C between the pressure rollers 7, 7, 7 and the auger shaft 1 causes a suction action at the time of lifting the auger rod, and the wall of the hole collapses and falls. Without having to do so, a pile hole having a stronger hole peripheral wall can be reliably and easily formed in the ground, and also has an excavation effect with almost no earth removal.

According to a second aspect of the present invention, it is possible to select and replace the shaft diameter, thickness, thickness, length, and the like of each of the compaction rollers 7, 7 and 7 in advance so as to be suitable for the excavated ground. It goes without saying that the optimum foundation ground for any hard and soft ground can be easily obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a ground excavation device according to a prior invention of the present invention;

FIG. 2 is a plan view of the same,

FIG. 3 is a front view of a ground excavation device according to the present invention,

FIG. 4 is a plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Auger shaft 2 Screw wing piece 3 Cutting edge 4 Auger head 5 Support rod 6 Bearing arm 7 Rolling rod 8 Joint 9 Mortar infusion tube

Claims (3)

(57) [Claims] 1. A plurality of support rods 5, 5, 5 around an auger shaft 1 on an auger head 4 at the upper portion thereof, and are radially triangular or pentagonal or the like via respective bearing arms 6.6.6. The support rods 5, 5,
5, the support rods 5, 5, and 5 are larger in diameter than the diameter and
A ground excavation characterized in that a plurality of thin rolling rollers 7, 7, 7 are loosely fitted in a rotating and replaceable manner in the auger axial direction . 2. The drilling apparatus according to claim 1, wherein
Each of the support rods 5, 5, 5 is freely and freely selectable and freely replaceable with a rolling roller 7.7.7 having a shaft diameter and a long and short length in order to adapt to the hardness of the predetermined ground for excavation. Ground excavation equipment characterized by the following. 3. The drilling apparatus according to claim 1, wherein
A ground excavation in which the outer peripheral rotation trajectory a of each of the compaction rollers 7, 7, 7 is arranged at least to the same diameter or a larger diameter as the blade width b of the screw blade piece 2 of the lower auger head 4. apparatus.