JP3035593B1 - Drilling equipment for foundation ground - Google Patents

Abstract

An object of the present invention is to surely excavate a pile hole having a strong hole wall surface suitable for a ground layer, even in a ground layer under any conditions such as softness. Kind Code: A1 A pressing rod is supported at each tip of several supporting arms extending outward with an auger shaft as an axis, and several embankments are provided in respective spaces a of the pressing rods. A removal blade support rod 4 having removal blades protruding at appropriate intervals is disposed so as to rotate in a direction opposite to the rotation direction of the pressing rod. In the mechanism, a rotation transmission mechanism 9 including an external gear 7 and an internal gear 8 is arranged in parallel with the rod support mechanism, and the external gear 7 is fixed and the internal gear 8 is provided on the inner peripheral side of the external gear 7. And the above-mentioned removal blade support rods 4, 4, 4 are connected to the internal gear 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to reliably excavate a pile hole having a solid hole wall surface suitable for the ground layer under any conditions such as softness, and particularly, to excavate each hole at the time of excavating the pile hole. The present invention relates to an excavation device for a foundation ground whose main purpose is to remove debris accumulated between compression rods very easily, easily and automatically.

[0002]

2. Description of the Related Art Conventionally, a so-called screw auger in which a screw is integrally attached to a rod surface is almost known in most of a ground drilling apparatus for drilling a foundation ground such as a building.
That is, such an apparatus is intended to excavate a pile hole having a predetermined diameter in the ground by a rotary excavation hole of a screw auger which follows the excavation by the excavation blade at the same time. However, in the case of the screw excavation described above, there is no place for the excavated debris to escape, and naturally the excavated debris excavates and accumulates on the ground along with the screw excavation. However, there are drawbacks such as the necessity of considerable expense and labor for the earth removal processing work. In order to solve the above-mentioned drawbacks, the inventor first created a strong hole wall by pressing against the peripheral wall of the hole by the action of a rotating rod that follows the excavated soil around the hole at the same time as the underground excavation by the screw auger and almost simultaneously. Invented a ground excavation apparatus that does not discharge excavated debris to the ground (Japanese Patent No. 2514566). That is, as shown in FIG. The excavated soil is not pressed to the ground by the rotation of the clamping rod 3 and is securely pressed and clamped to the periphery of the excavation hole without rotating the extruded soil to rotate the clamping rod 3. Drilling equipment has been developed and can be found in various places. Recently, however, during the above-mentioned rotary excavation, part of the excavated debris flows into each of the pressing rods 3 and 3 without being pressed against the peripheral wall of the hole, and the debris flows into the condensed debris to collect and accumulate. Eventually, it was found that there was a drawback that the hardening was hardened between the pressing rods 3 and 3 and that not only load resistance during excavation but also considerable labor was required to eliminate it.

[0003]

SUMMARY OF THE INVENTION The present invention prevents the debris from flowing into and accumulating on each of the pressing rods 3 and 3 during the rotary excavation operation by using a very simple mechanism, and at the same time improves the efficiency. It is an object of the present invention to provide an excavation device for foundation ground capable of demanding efficient rotary excavation.

[0004]

That is, the present invention has as its main object to largely solve the defects of the previously developed drilling rig.
In addition to the complete elimination of debris that has accumulated in the ground, the air and groundwater escape holes that have accumulated in the holes, which had been a problem with the conventional foundation excavation equipment, were also actively provided, while simultaneously excavating debris. Is to be pushed out strongly around the excavation hole to create a stronger hole wall, and to build a construction ground layer with strong bearing capacity in the ground, the outline of which is radial with the auger shaft 1 as an axis The clamping rods 3, 3, 3 having appropriate diameters are arranged at each end portion through several support arms 2, 2, 2, which can be extended, in a polygonal shape such as a triangular shape. 3,3 each space a
The removal blade supporting rods 4, 4, 4 each having a plurality of embankment removal blades 5, 5, 5 protruding therein are disposed so as to rotate in the opposite direction to the rotation direction of the pressing device. It is characterized in that debris that accumulates in each space a between the pressing rods 5, 5, 5 is simultaneously removed while pressing the peripheral wall of the hole. Further, as the drive rotation mechanism, a rotation transmission mechanism 9 including an external gear 7 and an internal gear 8 is arranged in parallel with a rod support plate 6 for supporting the respective clamping rods 3, 3, 3. The removal blade support rods 4, 4, and 4 are connected to each other and arranged to rotate in the direction opposite to the rotation direction of each of the compression rods 3, 3, 3. Further, on the shaft peripheral surface of the auger shaft 1, disturbing blades 10, 10, 10 having an appropriate length are provided so as to protrude so as not to come into contact with each other between the respective soil removal blades 5, 5, 5 during rotation. Each of the clamping rods 3,3
Of course, the removal of debris accumulated between the three can be more efficiently eliminated and the accumulated debris can be disturbed and kneaded well, and the excavated soil can be reliably expanded and pressed against the peripheral wall of the hole to reduce the possibility of falling off. It is possible to seek a strong solid wall.

[0005]

A ground excavated body according to the apparatus of the present invention will be described below. First, as shown in FIG. 4, a screw head 11 is connected and connected below the apparatus via a joint b, and the entire apparatus is used as a pile driver. By setting and driving the power machine A, the screw head 11 and the auger shaft 1 rotate in a predetermined direction, and the excavation blade 12 excavates the ground while excavating the ground at the tip. Simultaneously with the excavation, the excavated soil around the hole is excavated to a predetermined depth by the action of the screw of the screw head 6 while the surrounding excavated soil is extruded. Tightening rod 3,3,3
Can also be rotated at the same time, and the excavated debris that can be excavated first by the action of each of the clamping rods 3,3,3 can be firmly expanded and clamped on the hole peripheral wall to create a strong hole peripheral wall. During the rotary compaction, part of the excavated debris naturally flows into and accumulates in each space a of each of the compaction rods 3, 3, and 3 and gradually solidifies to generate considerable load resistance. It is a great obstacle to work. (In the case of the conventional apparatus) However, in the present invention, the outer gear 7 to which the internal gear 8 of the removal blade supporting rods 4, 4, 4 provided between the pressing rods 3, 3, 3 is fixed simultaneously with the excavation. Since the compression rods 3, 3, 3 are reversely rotated in a different direction from the rotation direction by the meshing action, the soil removal blades attached to the respective removal blade support rods 4, 4, 4 are provided. 5,5
By the rotation of 5, the accumulated debris is reliably eliminated, and the eliminated debris is expanded outward to assist the debris compaction function by the clamping rods 3, 3, and 3 to the peripheral wall surface of the hole. Can increase the compression effect. At the same time, the filled air inside the hole, which was a serious drawback during construction, flows out through each space a, so that when the auger is removed, the surrounding wall of the hole collapses due to the action of suction air pressure etc. Defects such as falling soil can be sought.

[0006] Thus, when the apparatus is lifted into a pile hole drilled in the ground, through the mortar feed hole 13 in the auger shaft 1, a coagulant such as mortar is filled into the bore from the tip of the screw head 11 to form a mortar column. In the construction and press-fitting of the core pile into the mortar column, a strong supporting ground layer can be surely constructed in the ground.

[0007]

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.
Several support arms 2, which can be radially extended around the
Several pressing rods 3,3 at appropriate intervals through 2,2
3 is supported in tandem. The arrangement of the clamping rods 3, 3, 3 is usually optimally formed in a triangular shape as shown in the drawing, but is formed in a square or other polygonal shape depending on the excavated ground. This is another consideration. According to the present invention, removal blade support rods 4, 4, 4 for projecting the soil removal blades 5, 5, 5 at appropriate intervals are provided in the respective spaces a of the above-mentioned compression rods 3, 3, 3. An internal gear 8 is attached to the upper part of the removal blade supporting rods 4, 4, and 4 in addition to the rotation transmission mechanism 9 of the compression rods 3, 3, and 3, and each internal gear 8 is fixed to the power machine 13. Due to the meshing rotation with the external gear 7, the respective removal blade supporting rods 4, 4, 4 are rotated in the opposite direction to the rotation direction A of the pressing rods 3, 3, 3. In addition, pressure-tightening is performed by projecting and disturbing the perturbing blades 10, 10, 10 of an appropriate length on the shaft peripheral surface of the auger shaft 1 so as not to come into contact with each other between the blades of the reservoir removing blades 5, 5, 5 during rotation. The removal of debris accumulated between the rods 3, 3, 3 can be more efficiently removed. Further, in the present invention, the screw head 11 is connected and used via the joint 15 at the time of underground excavation, but the blade width b of the screw is at least substantially the same as the rotation locus c of the pressing rod 3. It is desirable to form it to a diameter. Further, it is also possible to use a pressing device formed by the pressing rod 3 and the removing blade supporting rod 4 by connecting a plurality of members to appropriate short and long lengths via respective joints 15.

[0008]

As described above, the soil excavation apparatus according to the present invention has a large number of soil removal blades 5, 5, 5 in each space a between the pressing rods 3, 3, 3 rotating in a certain direction. 5, the removal blade supporting rods 4, 4, 4
Since it is configured to perform the rotation in the opposite direction to the rotation of the third and third rotations, the debris flowing between the pressing rods 3,3,3 during the excavation work on the ground is formed by the above-mentioned accumulated soil. By the reverse rotation of the removal blades 5, 5, 5, the removal can be reliably and easily performed in the outer peripheral direction. Accordingly, debris accumulates between the rods during rotation of the compression rods, which accumulates and solidifies and hardens, so that there is no trouble in the operation. Since the feeding is performed reliably, it is possible to reliably create a stronger consolidation wall, which has the effect of significantly reducing the amount of excavated earth and sand discharged onto the ground. In particular, in the present invention, the removal blade supporting rod 4 is rotated in the reverse rotation direction with respect to the forward rotation of the compression rod 3, and the soil is stored between the compression rods 3, 3, 3 by utilizing the reverse rotation action. Since it removes debris, any stiff foreign matter such as clay lumps, rock lumps, etc. can be easily removed as well as mere rubble.

As a second aspect of the present invention, a rotation transmission mechanism 9 including an external gear 7 and an internal gear 8 is arranged in parallel with the rod bearing mechanism 6 as a mechanism for removing debris accumulated between the rods. With the configuration provided, the pressing rod 3,
Several removal blade support rods 4, 3 for the rotation direction
4 and 4 can be simultaneously and reliably rotated in opposite directions, and the overall shape of the mechanism is small and flat, the load resistance during excavation is very small, and power consumption is reduced. It also has economic effects such as extremely low losses.

According to a third aspect of the present invention, an auger shaft 1 is provided.
A large number of disturbing blades 10, 10, 10 are protrudingly provided on the peripheral surface of the shaft between the respective blades of the soil removal blades 5, 5, which protrude from the removing blade support rod 4. There is an advantage that the debris flowing into each of the three spaces a can be more functionally and effectively eliminated. In addition, according to the present invention, since the space a is formed between each of the pressing rods 3, 3, 3, air which fills the hole through the space a with the underground excavation work is formed. It naturally rises and escapes to the ground, and it is possible to completely prevent the fear of collapse and fall of the hole peripheral wall due to the air suction force generated during work or when pulling out the auger rod, and at the bottom of the hole There is also an effect that spring water can be easily drained through the space a.

[Brief description of the drawings]

FIG. 1 is a partial schematic view of a ground excavation device according to the original invention of the present invention,

FIG. 2 is an overall front view of a foundation ground excavator according to the present invention;

FIG. 3 is an enlarged cross-sectional view of a main part according to the first embodiment;

FIG. 4 is a perspective view of the same. EXPLANATION OF SYMBOLS 1 Auger shaft 2 Support arm 3 Pressure rod 4 Removal blade support rod 5 Bank removal blade 6 External gear 7-Head 7 External gear 8 Internal gear 9 Rotation transmission mechanism 10 Disturbing blade 11 Screw head 12 Cutting edge 13 Mortar injection hole 14 Power machine 15 Joint a Space b Screw width c Rotation locus

Claims (3)

(57) [Claims] An auger shaft (1) has a plurality of supporting arms (2, 2) extending outwardly around an auger shaft (1).
3, 3 and 3 are arranged in a polygonal shape such as a triangular shape, and several soil removal blades 5, 5, 5 are provided in the respective spaces a of the pressing rods 3, 3, 3. The removal blade support rods 4, 4, 4 projecting at appropriate intervals are
In the excavator for foundation ground arranged to rotate in the direction opposite to the direction of rotation of 3,3, the forward rotation of the pressing rods 3,3,3 and the removal blade supporting rods 4,4,4. 4
By using the action of the counter rotation of the soil removal blades 5,5,5 attached to the pressure rods 3,5,5, the debris that flows into and accumulates in the space a between the pressure rods 5,5,5 is removed. An excavation device for foundation ground, wherein the excavation of a pile hole having a strong perimeter wall is carried out in the ground by pressing the peripheral surface of the hole at 3, 4, and 3. 2. A pressing rod 3, which is attached to each of the distal ends of several support arms 2, 2, 2 extending outwardly with the auger shaft 1 as an axis.
Removal blade support rods 4 which support the support rods 3 and 3 and have the soil removal blades 5, 5 and 5 protruding at appropriate intervals in the respective spaces a of the pressing rods 3, 3 and 3. , 4, 4 are arranged to rotate in the opposite direction to the rotation direction of the clamping rods 3, 3, 3 in each of the clamping rods 3 rotating together with the auger shaft 1. , 3 and 3, a rotation transmission mechanism 9 composed of an external gear 7 and an internal gear 8 is arranged in parallel with the rod support plate 6 to fix the external gear 7 and to the inner peripheral side of the external gear 7. An internal gear 8 is meshed with the internal gear 8, and the above-mentioned removal blade support rods 4, 4, 4 are connected to the internal gear 8, and the removal blade support rods 4, 4, 4 rotate the compression rods 3, 3, 3 respectively. 2. The excavation device for foundation ground according to claim 1, wherein the excavation device is arranged to rotate in a direction opposite to the direction. 3. An internal gear 8 meshing with an external gear 7 is operatively connected with removal blade support rods 4, 4, and 4,
In the excavation and compaction device for foundation ground which is arranged to rotate in the opposite direction to the rotation direction of 3, a large number of turbulent blades 10, 10, 10 are mounted on the shaft peripheral surface of the auger shaft 1, and the removal blade support rod 4 is provided. 3. The excavating device for foundation ground according to claim 2 , wherein the excavating device is provided so as to protrude between the respective blades of the soil removal blades (5, 5).