JPH07293174A - Drilling bucket for earth drilling construction method - Google Patents

Abstract

PURPOSE:To increase the torque and the pressing force, to reduce the rotation speed, to improve the drilling efficiency, 'and to take in the earth and sand easily, by providing a deflecting bottom plate and an earth and sand intake hole facing downward at the bottom. CONSTITUTION:A drilling bucket 2 is inserted in a surface layer casing, the earth and sand A in the ground is drilled by rotating the bucket 2 and a drilling edge 6, and it is taken in from an earth and sand intake hole 4. Then the earth and sand A is moved by fluctuating and rotating a shutter 5, and it is taken in smoothly by opening the earth and sand intake hole 4. Then, the earth and sand A housed in the bucket 2 is blocked inside the intake hole 4 by the shutter 5, and the drilling bucket 2 is pulled out on the ground. Following that, the bucket 2 is moved to a specific position, and the earth and sand A housed in the bucket 2 is exhausted. After that, such an operation and a procedure are repeated so as to form a specific depth of excavating hole under the ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth drill method (hereinafter referred to as the present method), that is, a rotary drilling bucket is used to excavate the ground (under the ground), and a rebar cage is provided in the excavation hole. And a drilling bucket used in a method of constructing concrete piles, etc. by filling with fresh concrete (hereinafter referred to as fresh concrete).

[0002]

2. Description of the Related Art As is well known, a drilling bucket is used in this method, and its general structure is a cylindrical shape having a converging bottom when viewed from the side, and an excavating blade and an openable and closable blade are provided on the converging bottom. It has a bottom lid. Then, while excavating underground soil by rotating the excavating blade installed in the ground, this excavated soil (excavated soil) is taken into the drilling bucket through the opening of the bottom lid, so-called excavation and uptake, etc. Repeat the above work to sequentially excavate the ground, and close the bottom cover at the stage (not limited) when the excavated soil is almost taken into the drilling bucket (pull up, pull out, etc.). The same as the above), after moving or installing this extracted drilling bucket to a predetermined position on the ground, the closed bottom lid is opened, and the excavated sand stored in the drilling bucket is discharged (discharged or removed). It is configured to do. In other words, the bottom of the drilling bucket has a converging shape in consideration of excavation resistance (earth pressure resistance), and the converging bottom has an excavating blade and an openable / closable bottom lid.

[0003]

DISCLOSURE OF THE INVENTION In the drilling bucket having the aforesaid convergent bottom, the excavated earth and sand are taken in through the opening of the bottom lid (hereinafter referred to as earth and sand intake).
Since it is a structure, it is relatively smooth in the case of non-sticky sand, etc., but it is not always smooth and easy to take in the earth and sand in the case of sediment such as clay and rubble mixed, and excavation into the ground There are problems such as a small blade rising angle, a weak pushing force, and inefficient excavation.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide an optimum drilling bucket when the rotating force is large, the rotating speed is slow, and the pushing force is large. , Adopt the following configuration.

That is, in the drilling bucket for earth drilling method according to the present invention, the bottom of the drilling bucket is formed by the deflection bottom plate and the bottom plate, and the earth and sand intake port is formed between the deflection bottom plate and the bottom plate to take in the earth and sand. A shutter for opening and closing the mouth is provided on the bottom portion, and an excavating blade is provided on the tip portion of the deflection bottom plate.

[0006]

The function of the present invention will be described below. The kerry bar and connecting shaft are lowered, and the drilling bucket is inserted into the surface layer casing (an example). After that, the drilling bucket and the excavating blade are rotated in a predetermined direction via a driving device (not shown), and the earth and sand are excavated through the excavating blade while the earth and sand are taken in from the earth and sand intake port. At this time, in the present invention, the rise of the excavation blade is used to achieve efficient excavation, and the large sediment intake port is utilized to achieve smooth and reliable sediment intake. Then, by this earth and sand intake, the shutter installed in the earth and sand intake port is moved (displaced) via rocking (examples in FIGS. 1 and 3), slide (example in FIG. 4), rotation (example in FIG. 5), and the like. Then, the earth and sand inlet is opened, and the opened earth and sand inlet is used to smoothly and surely take in the excavated earth and sand. By repeating the rotation of the drilling bucket and the excavation work of the excavating blade, when the sediment is taken into the drilling bucket and the excavated soil is stored in the drilling bucket, the released shutter is returned to the original position. After closing the opened soil intake (with exception), pull out the drilling bucket to the ground (of course, if necessary, means for preventing collapse of excavation holes is provided).

After moving or installing the pulled-out drilling bucket to a predetermined position on the ground, the closed earth and sand intake is opened, and the excavated earth and sand stored in the drilling bucket is discharged (discharged or removed).

After that, the above-mentioned operations and procedures are sequentially repeated to reach a predetermined position in the ground of the drilling bucket, whereby a drill hole having a predetermined depth is formed in the ground. Then, the construction of the piles and the like thereafter is basically interpreted in the same manner as the conventional example.

In addition, as shown in FIG. 8, in the structure in which the earth and sand extruding device is installed in the drilling bucket, as described above,
Sediment and / or push-up device taken in from the earth and sand intake
By the push-up drive device, the guide device, etc., the earth and sand push-out plate was lifted and moved to the inner lid surface of the drilling bucket (there is no limitation, there may be somewhere in the drilling bucket, etc.), and the earth and sand was stored in the drilling bucket. In this case, the drilling bucket is pulled out from the ground, and then the shutter is opened to open the earth and sand intake port, and the earth and sand in the drilling bucket is almost forcibly discharged through the earth and sand extrusion plate. . The shape, operation method, and movement method of the earth and sand extrusion plate are not limited, and any mechanism having an earth and sand extruding function is not limited.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. First, the example shown in FIGS. 1 to 3 has a configuration in which a shutter (a closed body, the shutter can be of any type such as an integral type, a split type, and a folding type; the same applies hereinafter) is used. A pair of earth and sand inlets 4 (not limited to a pair; the same applies hereinafter) to a bottom portion 3 of a drilling bucket 2 having 1 (a connecting cylinder, a connecting rod, a suspension rod, etc.), and a pair of shutters 5 for opening and closing the earth and sand inlets 4. And (not limited to a pair, the same applies hereinafter), standing upright on the bottom portion 3,
Further, it is composed of a pair of deflection bottom plates 7 each having an excavating blade 6 at its tip portion 7a (not limited to a pair, the same applies hereinafter). In this example, the flat bottom plate 31 is formed with a bending guide inclined portion 31b at the substantially central portion thereof, and is desirably aligned with the deflection angle of the deflection bottom plate 7 to make the intake of sand and sand smoother. There is. Of course, the presence or absence of the bending guide inclined portion 31b is free (the same applies hereinafter).

Next, each example of the shutter 5 will be described with reference to FIGS. 1 to 5. First, in the example shown in FIGS. 1 to 3, the shutter 5 swings, and 8 denotes the shutter. It is pivotally attached to the bottom part 3 by means of a pivot part 8 of 5. That is, FIGS. 1 and 2 show examples in which the flat bottom plate 31 is pivotally attached to the tip end portion 31a and FIG. 3 is pivotally attached to the base end portion 7b of the deflection bottom plate 7. Although not shown, it may be pivotally attached to the end surface of the earth and sand intake port 4 in the radial direction. Further, depending on the pivot position of the shutter 5, it may be necessary to slightly change the design of the shape, size, form, etc. of the shutter 5. In the figure, A indicates earth and sand. In addition, the plate of the shutter 5 has a flat shape, an inclination, etc., so that it is free in principle, and its opening and closing operation is also free. Next, in the example shown in FIG. 4, the shutter 5 is configured to slide, and by slidingly moving to both or one of the upper and lower sides 31c and 31d of the flat bottom plate 31, all or part of the earth and sand intake port 4 is opened and closed. However, there may be some restrictions on implementation. In the example shown in FIG. 5, the shutter 5 is configured to rotate, the shutter 5 rotates about a pivot shaft (not shown), and both upper and lower sides 31c and 31d of the flat bottom plate 31 are superposed on one side. It is structured to be.

Next, another example of the bottom portion 3 will be described with reference to FIG. 6, which is an example in which the bottom portion 3 is an inclined bottom plate 32, and the shape of the shutter 5 will be described later with reference to FIGS. 7,
Each example of FIG. 8 and the like is adopted. In this configuration, the earth and sand intake port 4 becomes slightly narrower, but it can be used depending on the method of use or soil quality.

FIG. 7 shows a peculiar example, in which a part or all of the deflection bottom plate 7 swings and a shutter function is also used, and it is considered that the bottom plate 7 is used under various conditions such as soil conditions. To be

Further, the example shown in FIG. 8 is an example in which the drilling bucket 2 of each of the above-mentioned configurations is equipped with the earth and sand extruding device 9, and in the illustrated example, the earth and sand extruding plate 91 uses the earth and sand A taken in from the earth and sand intake 4 or the like. The construction is such that it rises and descends due to its own weight when the earth and sand in the drilling bucket 2 is discharged, and 92 is a guide pole of the earth and sand extrusion plate. Note that the earth and sand push-out plate 91 may be automatically operated by a spring wound around a guide pole 92 (not shown), a hydraulic device, or other lifting device.

[0015]

As described in detail above, the present invention has a structure in which a bottom plate of a drilling bucket is provided with a downward deflection plate and a sediment intake port, and the deflection bottom plate is provided with an excavating blade. It has such an effect.

(1) The rotating force is large and the rotating speed is slow,
It is also most suitable for a drilling bucket under conditions such as a large pushing force.

(2) Since the deflection bottom plate and the excavating blade stand up from a normal drilling bucket, the excavation efficiency is improved, and the intake of sediment is facilitated and the efficiency is improved.

(3) It has practicality and versatility, such as a large earth and sand intake port, facilitating the intake of earth and sand, achieving efficiency and smooth intake, or effectively responding to various soil types. .

[Brief description of drawings]

FIG. 1 is a partially omitted overall vertical cross-sectional view of the present invention.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a main-portion cross-sectional view showing another example of a shutter.

FIG. 4 is a cross-sectional view of main parts showing another example of the shutter.

FIG. 5 is a bottom view showing still another example of the shutter.

FIG. 6 is a cross-sectional view showing another example of the bottom portion.

FIG. 7 is a cross-sectional view showing another example of the deflection bottom plate.

FIG. 8 is a cross-sectional view showing an example in which a sand-extruding device is attached to a drilling bucket.

[Explanation of symbols]

 1 Connection shaft 2 Drilling bucket 3 Bottom 31 Flat bottom plate 31a Tip part 31b Bending guide inclined part 31c Upper side 31d Lower side 32 Inclined bottom plate 4 Sediment intake port 5 Shutter 6 Excavation blade 7 Deflection bottom plate 7a Tip part 7b Base end part 8 Pivotally attached Part 9 Sediment Extrusion Device 91 Sediment Extrusion Plate 92 Guide Pole A Sediment

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[Procedure amendment]

[Submission date] December 22, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

After moving or installing the extracted drilling bucket to a predetermined position on the ground, the closed soil is closed.
The sand intake port is opened, and the excavated soil stored in the drilling bucket is discharged (discharged or removed).

Claims (5)

[Claims] 1. A bottom part of a drilling bucket is formed of a deflection bottom plate and a bottom plate, and a sediment intake port is formed between the deflection bottom plate and the bottom plate, and a shutter for opening and closing the sediment intake port is provided on the bottom part, Further, a drilling bucket for the earth drill method, in which an excavating blade is provided at the tip of the deflection bottom plate. 2. The drilling bucket for the earth drill method according to claim 1, wherein the bottom plate of claim 1 is a flat bottom plate. 3. The earth drill method according to claim 1, wherein the shutter according to claim 1 or 2 is a swing type shutter pivotally supported by a base end portion of a deflection bottom plate or a tip end portion of a flat bottom plate. Drilling bucket. 4. The drilling bucket for the earth drilling method according to claim 1 or 2, wherein the shutter according to claim 1 or 2 is configured by a slide system. 5. A drilling bucket for an earth drilling method according to claim 1 or 2, wherein the shutter according to claim 1 or 2 is constituted by a rotary system.