JP3039561U - Mixer mixing agitator equipment - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To improve the action of a co-rotation preventing device in a soil improvement machine. SOLUTION: An excavation head 4 for excavating is provided at a lower end of an excavation shaft 1, and a stirring blade 2 is provided above the excavation shaft 1, and a supporting cross beam member 3 is fixed between the both of the excavation shaft 1 to support the same. A plurality of reversing stirring blades 5 contacting the inner wall of the hole excavated by the head are rotatably attached to the cross beam member 3, and the reversing stirring blade 5 comes into contact with the inner wall of the hole,
The excavation head 4 and the stirring blade 2 are rotated in the opposite direction.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a ground improvement machine for mechanically mixing and solidifying soil and a filler in a foundation work to improve the ground into a cylindrical shape, and more particularly to a mixing and stirring blade device for mixing and stirring the cutting soil.

[0002]

[Prior art]

 Conventionally, ground improvement machines that improve the ground to a cylindrical shape have an excavation blade and an agitation blade that are integrated with the excavation shaft.The excavation shaft is rotated by a predetermined excavation mechanism to advance, and during excavation or extraction. At times, while filling the filling material such as sodium silicate and cement milk from the fluid passage provided in the excavation shaft at low pressure, the excavated soil and the filling material are forcibly stirred and solidified.

In this type of ground improvement machine, soil is temporarily excavated by a mixing head, the filler is supplied to the gap in the excavated soil at a low pressure, and the filler and the excavated soil are forcibly mixed and stirred. Therefore, it is easy to apply to sandy soil and silt type ground, but in cohesive soil, especially hard cohesive soil and peat layer, the soil to be improved and the stirring blade co-rotate. However, the mixing and mixing of the cutting soil and the filler could not be done sufficiently, and the construction was quite difficult.

Japanese Patent Publication No. 58-29374 discloses an invention made to eliminate the above problems. The present invention is directed to an excavating shaft provided with an excavating blade and a stirring blade, and the excavating diameter of the excavating blade located on the excavating shaft between the excavating blade and the stirring blade and / or between the stirring blade and the stirring blade. A co-rotation preventive device having a co-rotation preventive vane having a larger diameter is rotatably attached to an excavation shaft through a boss, and a mixing and stirring device for cutting soil is provided.

In the above invention, since the co-rotation preventing blade of the co-rotation preventing device is free with respect to the excavation shaft, it is held stationary even during rotary excavation of the excavation shaft. The excavated soil excavated by the excavation blade enters the anti-rotation device while rotating, but the rotation of the excavated soil is stopped here because the anti-rotation blade is stationary. Therefore, the excavated soil is agitated by the co-rotation prevention blade between the excavation blade and the agitation blade.

However, both of them are still stationary due to the failure of the anti-rotation blade, so that a part of the stirring due to this is felt to be insufficient.

The present invention has been made based on the above circumstances, and provides a co-rotation preventing device with a mixing and stirring blade device of a soil improving machine, which is capable of anti-rotating the excavation blade and the stirring blade in a reverse direction to expect a further stirring effect. .

[0008]

[Means for Solving the Problems]

 The mixing and stirring blade device for cutting soil according to the present invention includes an excavating blade and an excavating shaft provided with the stirring blade, and a supporting cross beam fixed to the excavating shaft between the excavating blade and the stirring blade. It is characterized in that a plurality of reverse stirring blades protruding outside the circumference having a diameter larger than the excavation diameter of the excavation blade are rotatably provided.

In the mixing and stirring blade device of the soil improving machine of the present invention, the reverse stirring blade is rotated in the direction opposite to the head and stirring blades, which is different from the conventional co-rotation preventing device in the conventional device. Since it is involved in stirring, a good stirring effect can be obtained.

[0010]

[Embodiment of the invention]

 1 is a schematic front view showing an embodiment of the present invention, FIG. 2 is a schematic plan view thereof, FIG. 3 is a schematic bottom view of an intermediate portion, and FIG. 4 is a schematic bottom view of a lower end portion thereof.

In these figures, the excavation shaft 1 which is appropriately connected to the excavator and can be rotated and excavated, rotated and pulled out, from above, the stirring blade 2 attached to the excavation shaft 1 and the stirring blade 2. A supporting cross beam 3 is attached to the excavation shaft 1 at the lower part of 2, and an excavation head 4 is attached to the tip end, and the upper surface of the support cross beam 3 is inscribed in a circle having a diameter larger than the length of the excavation head 4. For example, two reverse stirring blades 5 with three blades are rotatably attached.

When the excavation shaft 1 having the above-mentioned configuration is rotated and excavated by an excavator (not shown), the excavation head 4 excavates a hole in the existing soil 7 having a diameter equal to its width, and agitates it. The blade 2 and the excavation head 4 rotate together with the excavation shaft 1 in the same direction. On the other hand, the supporting cross beam 3 is fixed to the excavation shaft 1 and is rotated in the same direction as the excavation head 4 and the stirring blade 2. Since it is inscribed in a circle having a diameter larger than that of the drilled hole, it is in contact with the wall surface of the hole and is rotated in the opposite direction to the supporting cross beam 3, and thus the drilling shaft 1 and the stirring blade 2.

Therefore, in comparison with the case where the stirring blade device disclosed above is merely provided with the co-rotation preventing blade that is in a stationary state, since the stirring blade is the reverse stirring blade, the excavated soil and the filling material are more excellent. Stirring and mixing are performed well, and a good improved ground 6 can be obtained.

[0014]

[Effect of the invention]

 Since the stirring blade device of the present invention is provided with the head and the reversing stirring blade which rotates in the opposite direction to the stirring blade, co-rotation between the head and the stirring blade is completely prevented, and good excavated soil and filling material are prevented. Stir-mixing is performed, and good results can be expected for soil improvement.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an embodiment of the present invention.

FIG. 2 is a schematic plan view of FIG.

FIG. 3 is a schematic bottom view of an intermediate portion.

FIG. 4 is a schematic bottom view of the lower end portion of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Excavation axis 2 ... Mixing blade 3 ... Supporting cross beam 4 ... Head 5 ... Reverse stirring blade 6 ... Improved ground 7 ... Existing soil 8 ... Excavation soil.

Claims (1)

[Utility model registration claims] 1. An excavation shaft provided with an excavation blade and a stirring blade, and a supporting cross beam fixed to the excavation shaft between the excavation blade and the stirring blade, and the excavation diameter of the excavation blade is fixed to the supporting cross beam. A mixing and stirring device for cutting soil, which is rotatably provided with a plurality of reverse stirring blades protruding outside the circumference of a larger diameter.