JPH081062B2 - Agitator for excavator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stirrer for an excavator used when excavating a deep vertical hole in soil, and more specifically, for excavating a deep vertical hole in soil for concrete improvement while excavating a deep vertical hole. The present invention relates to an agitator for excavator equipped with a main excavation blade and an auxiliary rotary blade for injecting a hardening agent and stirring or mixing the earth and sand and the concrete or the earth and sand and the hardening agent.

[0002]

2. Description of the Related Art When constructing a residential land or a factory, the soil quality of the site is improved so as to be suitable for the ground of the building. Therefore, as shown in FIG. 10, a large number of columnar piles 20, 20, ..., etc. are driven into the ground of a building to form the ground. Such columnar piles 20, 20, ..., etc. are formed as follows. To do. That is, as shown in FIG. 11, a vertically long column 30 is attached to a base machine such as a bulldozer, and the column 3 is attached.
A box 31 that can move up and down is attached to 0, and a long rotating rod 32 (driving shaft) and a motor 33 that rotationally drives the rotating rod 32 are attached to the box 31, and the rotating rod 32 is deeply buried in the soil. Concrete liquid injection port or curing agent slurry installed at the bottom of the box 31 while excavating.
A hardening agent slurry liquid or the like is injected from the pouring port 34 and solidified to form the columnar pile 20 to form the ground. In this case, a digging portion 35, a stirring blade 36, a concrete liquid or a hardening agent slurry liquid jet 37, etc. are attached to the tip of the rotary rod 32 so that the earth and sand are stirred while excavating the ground. As a conventional stirring device for the tip portion of the rotary rod of an excavator, as shown in FIG. 8, an excavation blade 62 at the tip portion of the rotary rod 61 and a tubular body having a large diameter fitted around the rotary rod 61 are inserted. A type in which a non-rotating blade 64 fixedly attached to 63 is attached, or as shown in FIG. 9, a large-diameter rotating rod 73 fitted around the excavating blade 72 and the rotating rod 71 at the tip of the rotating rod 71. There is a type in which a reverse-rotating excavation blade 74 fixedly attached to is attached, and the like, and is designed to stir the surrounding earth and sand simultaneously with rotation.

[0003]

As described above, when improving the ground, the excavator is used to excavate deep into the soil to dig down while agitating and mixing earth and sand or concrete or earth and sand and a hardening agent. After pulling up, columnar piles are formed in the soil. In this case, the conventionally known agitator has a large size, requires a long time, and tends to be slightly inefficient. Furthermore, unevenness is likely to occur in stirring and mixing,
Stir-mixing of concrete and hardener with soil is not always sufficient. The present invention has been made in view of the above problems, and an object of the present invention is to efficiently stir while crushing the earth and sand at the same time as the rotation, and to sufficiently mix the earth and sand or the earth and sand and the hardening agent. An object of the present invention is to provide a stirring device for an excavator that can be performed in a short time.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a stirring device for an excavator which collects earth and sand around a main rotating rod for ejecting concrete liquid or a hardening agent from the inside of the hollow. The present invention is characterized in that a plurality of main excavating blades for mixing and stirring are fixed to a rotary arm, and a plurality of auxiliary rotary blades that rotate around the rotary arm are pivotally attached. Alternatively, the auxiliary rotary vane is characterized in that the auxiliary rotary vane is composed of two plates pivotally attached by a hinge so as to be rotatable by a predetermined angle.

[0005]

The operation when the excavator agitator is used as the above means will be described with reference to the reference symbols in the accompanying drawing (FIG. 7). If the agitator for an excavator is used as the above means, the main excavation blade 3 and the rotating arm
The soil 4 is stirred and mixed very well by the drum 4 and the auxiliary rotary blade 5. Then, the ground is constructed according to the following procedure. While rotating the main rotating rod 2, the main rotating blade 2 and the rotating arm 4 of the stirring device for the excavator at the tip end are excavated into the soil and excavated to a predetermined depth. When the main rotary rod 2 is rotated clockwise, for example, these main excavation blades 3 and rotary arms 4 rotate to stir the soil, and then the auxiliary rotary blade 5 rotates counterclockwise to finely rotate the soil. Mix and stir. In this case, concrete or hardener slurry liquid is jetted from the tip of the main rotating rod to mix and stir well with the soil there. Next, the main rotating rod 2 is slowly reversed and gradually pulled upward. Also in this case, the main excavation blade 3 and the rotary arm 4
The auxiliary rotary blade 5 rotates in the direction opposite to the direction at the time of entry, and mixes and stirs the soil, concrete or curing agent well. Shortly after the excavator agitator is pulled out, a certain hard pile column is formed in the soil. In this way, the action is repeated on the land where the building is to be built to form the solid pile-like pillars to form the ground.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a state in which a column 11 having a rotating rod 1 equipped with the excavator stirring device of the present invention is attached to a base machine 10, and FIG. 2 is a front view of the excavator stirring device. 3A is a plan view of the stirring device for the excavator, FIG. 3B is a side view of the auxiliary rotor 5 of FIG. 3A,
FIG. 4 is a perspective view of the auxiliary rotary blade 5. A box 12 is installed in the column 11 so as to be movable up and down, and a motor 13 is arranged in the box 12 and a rotary rod 1 which can be dug down according to the digging depth is attached to the lower part of the box 12 so as to rotate forward and backward. ing. In addition, a liquid concrete or hardening agent slurry liquid injection port 14 is provided in a lower portion of the box 12, and a main rotating rod 2 connected to a lower portion of a hollow rotating rod 1 is provided.
It is designed to be discharged from the lower part of.

The excavator stirring device rotatably attached to the tip of the rotating rod 1 is, as shown in FIGS. 2 to 4, fixed to the main rotating rod 2 and the main rotating rod 2. The main excavation blade 3, a rotary arm 4 that is also fixed to the main rotary rod 2, and a plurality of auxiliary rotary blades 5 that freely rotate in the vicinity of the tip of the rotary arm 4. It In this case, since the auxiliary rotary vanes 5 are provided around the rotary arm 4, that is, the rotary shaft is oriented in the rotary arm 4 direction, the rotary surface thereof is in a direction substantially perpendicular to the main excavating blade 3 ( Digging direction)
Becomes A shaft 4a is provided near the tip of the rotary arm 4 and a bush 5 is provided so that the shaft 4a can freely rotate with respect to the shaft 4a.
a is inserted and the auxiliary rotor 5 is fixed to the bush 5a. Further, the auxiliary rotary blades 5 are attached at positions L ₁ and L ₂ from the ends of the left and right rotary arms 4, respectively, so that the soil can be mixed and stirred as much as possible. The number of the main excavation blade 3, the rotary arm 4 or the plurality of auxiliary rotary blades 5 may be increased or decreased, and a plurality of sets of auxiliary rotary blades 5 are pivotally attached to each rotary arm 4. May be. Further, as shown by the chain double-dashed line in FIG. 2, some of the rotary arms 4 may be vertically offset.

FIG. 5 is a perspective view of the tip of the main rotating rod 2. As shown in this figure, a tip head 6 is attached to the tip of the main rotary rod 2 for protecting the end of the main rotary rod 2 and for cutting and entering into the soil. A lid 7 is openably and closably attached to the inside of the tip of the main rotating rod 2 so that a concrete liquid, a curing agent or the like can be ejected from the lid 7. The lid 7 is closed at the time of excavation so that the earth and sand do not enter the main rotating rod, but when the earth and sand and the concrete are mixed, the concrete and the hardener slurry which are opened and ejected (by pressure) are ejected. The liquid is mixed with the earth and sand by the main excavation blade 3, the rotary arm 4, the auxiliary rotary blade 5, and the like.

FIG. 6 shows a modification of the auxiliary rotor blade 5 used in the embodiment of the present invention. That is, the auxiliary rotary vane 5 is configured such that two plate members 51 and 52 are pivotally attached to each other by a hinge 53, and one plate member 52 is fixed to a fixed rod 54 fixed to the bush 5a. Plate material 51
The hinges 53 can be rotated by a certain angle by a hinge 53, and the soil and the curing agent can be further agitated and mixed while being opened and closed by the weight of earth and sand when the rotating arm 4 is rotated and agitated.

The structure of the excavator agitator of the present invention is as described above. Next, the operation will be described with reference to FIG. While rotating the main rotating rod 2, the main excavating blade 3, the rotating arm 4, the auxiliary rotating blade 5, etc. of the stirring device for the excavator at the tip end are excavated into the soil to excavate to a predetermined depth (Fig. 7 (A)). When the main rotating rod 2 is rotated clockwise, for example, these main excavating blades and arms rotate and stir the soil,
The auxiliary rotary blade 5 rotates counterclockwise to finely mix and stir the soil. In this case, from the tip of the main rotating rod,
Or the hardener slurry liquid is sprayed and mixed well with the soil there (Fig. 7 (B)). Next, the rotating rod 1 and the main rotating rod 2 are slowly reversed while being gradually pulled upward. Also, the main excavating blade 3, the rotating arm 4 and the auxiliary rotating blade 5 are rotated in the opposite direction to the direction at the time of entry, and well mix and stir the soil, concrete or hardening agent (Fig. 7 (C)). A certain hard pile column is formed in the soil a while after the stirrer is pulled out (Fig. 7 (D)). As described above, the ground is repeatedly formed on the land where the building is to be built. .

[0011]

The agitator for excavator of the present invention is constructed as described in detail above. Therefore, although it has a relatively simple structure, the soil and the concrete or the soil and the hardening agent are very well in the soil. It can be mixed and stirred to efficiently improve the ground. Moreover, since efficient mixing and stirring are performed, the construction work time is shortened and the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a side view showing a state in which a column equipped with a rotary rod equipped with an agitator for excavator of the present invention is attached to a base machine.

FIG. 2 is a front view of a stirring device for an excavator.

FIG. 3 is a plan view of a stirring device for an excavator, which is shown in FIG.
FIG. 3 is a plan view of the agitator for an excavator, and FIG.
It is a side view of the auxiliary stirring blade of (A).

FIG. 4 is a perspective view of an auxiliary stirring blade.

FIG. 5 is a perspective view of a tip portion of a main rotating rod.

FIG. 6 is a perspective view of a modified example of the auxiliary rotor.

7 (A) to 7 (D) are views showing a state in which a deep building hole is bored in the ground to form a columnar pile to form the ground.

FIG. 8 is a perspective view of a conventional excavator agitator equipped with rotary blades at the tip of a rotary rod and non-rotary blades fixedly attached to a large-diameter cylindrical body fitted around the rod. It is a figure.

FIG. 9 is a perspective view of a conventional stirring device for an excavator, in which a rotary blade is attached to the tip of a rotary rod and a reverse rotary blade fixedly attached to a large-diameter rotary rod that is fitted around the rod. Is.

FIG. 10 is a view showing a state in which the soil is mixed with a concrete or a hardening agent and stirred while forming a deep hole in the soil by the conventional stirring device for an excavator to form the ground.

FIG. 11 is a diagram showing the improved ground and a structure standing on it.

[Explanation of symbols]

1 rotating rod 2 main rotating rod 3 main stirring blade 4 rotating arm
4a Rotating shaft 5 Auxiliary rotor 5a Bushing 6 Tip head 7 Lid 10 Base machine 11 Column 12 Box 14 Hardener injection port 51, 51 Plate material 53 Hinge
54 fixed rod

Claims (2)

[Claims] 1. A plurality of main excavating blades for mixing and stirring earth and sand and a rotating arm are fixed around the main rotating rod for ejecting a concrete liquid or a hardening agent from the inside of the hollow, and the rotating arm is also attached. A stirrer for an excavator, comprising a plurality of auxiliary rotor blades pivoting around. 2. The agitator for an excavator according to claim 1, wherein the auxiliary rotary blade is composed of two plates pivotally attached to each other by a hinge so as to be rotatable at a constant angle.