JPH0529063Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a stirring and mixing device used to stir and mix earth and sand and a consolidation agent to form columns when constructing earth retaining walls and the like.

Conventional technology Conventionally, this type of stirring and mixing device has a stirring shaft placed inside a casing, an auger head attached to the tip of the stirring shaft, and stirring blades arranged in multiple stages along the axial direction above the auger head on the stirring shaft. There is a known configuration in which the casing, stirring shaft, etc. are rotated in opposite directions by a drive device.

According to this conventional stirring and mixing device, the ground is excavated by rotating the stirring shaft and the casing in opposite directions, and as the excavation is carried out, the excavated soil is moved upward.
The mixture is stirred and mixed with a solidifying agent using a stirring blade to form columns. By sequentially forming these pillars, a continuous earth retaining wall can be constructed.

Problems to be Solved by the Invention However, in the conventional structure as described above, the stirring blade is attached only to the stirring shaft, so when working with particularly strong adhesive clay, etc., the stirring blade and the clay soil, etc. The particles rotate together, making it impossible to uniformly stir and mix the clay soil, etc. with the consolidation agent, resulting in poor strength, water leakage prevention effect, etc. Therefore, it is necessary to repeatedly raise and lower the stirring shaft and casing to perform the stirring and mixing work described above, which not only lowers work efficiency but also wastes a large amount of solidifying agent, making it uneconomical. There were other issues.

The present invention solves the problems of the conventional technology as described above, and even if the excavated ground is sticky soil with strong adhesiveness, it is possible to uniformly stir and mix the soil and consolidation agent in the excavated ground. This not only improves strength and water leakage prevention effect, but also improves work efficiency, and furthermore, prevents wasteful consumption of solidifying agents and improves economic efficiency. The object of the present invention is to provide a stirring/mixing device that has the following characteristics.

Means for Solving the Problems The technical solution of the present invention to achieve the above object includes a drive device that is supported so as to be movable up and down along the guide rail of the leader mast, and a drive device that is rotatably supported on the underside of the drive device. a casing that is integrally linked to the casing so that it can be raised and lowered; and a stirring shaft that is disposed inside the casing and is linked to the drive device so that it can rotate in the opposite direction to the casing and can be raised and lowered integrally. and a first stirring blade attached to the stirring shaft in a plurality of stages along the axial direction; A second stirring blade is mounted differently.

Then, each of the second stirring blades is fixed to a mounting plate, and each mounting plate is fixedly attached so as to close the mounting hole formed in the casing, so that each stirring blade is mounted inside the casing. preferable.

Therefore, according to the present invention, the ground is excavated by rotating the stirring shaft, the first stirring blade, the casing, the second stirring shaft, etc. in opposite directions to each other, and as the excavation is performed, the excavated soil is moved upward. The first and second stirring blades, which rotate in opposite directions, can prevent the excavated soil between them from rotating together with the stirring blades, and the stirring shaft, casing, etc. can be repeatedly raised and lowered. It is possible to uniformly stir and mix excavated soil and consolidation agent by reducing the number of times.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 4 show a stirring and mixing device in one embodiment of the present invention, and FIG. 1 is an overall front view;
FIG. 2 is a right side view thereof, FIG. 3 is an enlarged perspective view of the main part, and FIG. 4 is an enlarged horizontal sectional view thereof.

As shown in FIGS. 1 and 2, a leader mast 2 is vertically supported on the front side of the base machine 1, and a drive device 4 is supported so as to be movable up and down along a guide rail 3 of the leader mast 2. wire 5
It is suspended by. The drive device 4 is equipped with an electric motor and its reduction gear (both not shown).
A casing 6 is arranged below the drive device 4,
The casing 6 is rotated by a speed reducer of the drive device 4, and linked to the drive device 4 so that it can be raised and lowered integrally, and its lower part is connected to a holding device 7 attached to the front side of the base machine 1 so that it can rotate and be raised and lowered. Possibly held. A hollow stirring shaft 8 is disposed inside the casing 6, and the stirring shaft 8 is rotated in the opposite direction to the casing 6 by a reducer of the drive device 4.
Moreover, it is linked to the drive device 4 so that it can be moved up and down integrally. A carbide bit 9 is attached around the tip of the casing 6 as necessary, and an auger head 10 (or a bit) is detachably attached to the tip of the stirring shaft 8, and the auger head 10 projects toward the front of the casing 6. There is.

In particular, as is clear from FIGS. 3 and 4, the first stirring blades 11 are attached to the stirring shaft 8 in multiple stages along the axial direction above the auger head 10, and as an example, each stage has a pair of first stirring blades 11. the first of
The stirring blades 11 are arranged with a phase shift of approximately 180 degrees and are inclined in mutually intersecting directions. Inside the casing 6, second stirring blades 12 are installed in multiple stages along the axial direction, and at different axial positions from the first stirring blades. That is, mounting holes 13 are formed in the casing 6 at the mounting positions of the respective second stirring blades 12 , and each of the second stirring blades 12 is fixed to the mounting plate 14 . The mounting plate 14 is curved along the outer surface of the casing 6 and is formed in a larger shape than the mounting hole 13 so as to close the mounting hole 13 , and has an outer edge of the mounting hole 13 in the casing 6 and an outer edge of the mounting plate 14 . A plurality of screw holes 15 and screw mounting holes 16 are formed in correspondence with each other. Therefore, the second stirring blade 12 is inserted into the casing 6 through the mounting hole 13, the mounting hole 13 is closed by the mounting plate 14, and the bolt is inserted from the screw mounting hole 16 of the mounting plate 14 into the screw hole 15 of the casing 6. 1
7 and fixing the mounting plate 14 to the casing 6, the second stirring blade 12 is attached to the casing 6.
Can be installed inside. As an example, in each stage, a pair of second stirring blades 12 are disposed correspondingly and inclined in a direction crossing each other. By using the method of attaching the second stirring blade 12 as described above, it is possible to easily assemble the casing 6, the second stirring blade 12, the stirring shaft 8, the first stirring blade 11, etc. A spout (not shown) for a solidifying agent such as poorly mixed cement milk is formed at the tip of the hollow stirring shaft 8, and an injection port (not shown) formed at the base end of the stirring shaft 8 is connected to a hose (not shown). It is connected to a compacting agent pumping device (not shown) via a solidifying agent (not shown).

The operation of the above configuration will be described below.

The drive device 4 is operated, and the casing 6, the second stirring blade 12, the stirring shaft 8, and the first stirring blade 1 are activated.
The ground is excavated by lowering the drive device 4, casing 6, stirring shaft 8, etc. along the guide rail 3 while rotating the excavators 1 in opposite directions. Along with excavation, the excavated soil is moved upward, and the rotating first and second stirring blades 11 and 12 stir and mix the excavated soil and the solidifying agent spouted from the spout. At this time, since the first and second stirring blades 11 and 12 are rotating in opposite directions as described above,
Even if the excavated soil between them has a particularly strong adhesive force, it can be prevented from rotating together with the stirring blades 11 and 12, and the number of repetitions of lifting and lowering of the stirring shaft 8, casing 6, etc. can be reduced. The excavated earth and sand can be uniformly stirred and mixed with the consolidation agent. By sequentially forming columns in this way, a continuous earth retaining wall can be created, and this earth retaining wall is made by uniformly stirring and mixing the excavated earth and sand and a consolidation agent as described above, so that it can improve its strength and water leakage. Excellent stopping effect.

In the above embodiment, only the first stirring blade 11 is provided above the auger head 10 on the stirring shaft 8, but spiral movement is provided at multiple locations along the way to actively move the excavated soil upward. Wings may be attached. Furthermore, the mounting holes 13 for each desired stage in the casing 6 are closed with mounting plates 14 that do not have the second stirring blades 12, so that the mounting interval of the second stirring blades 12 can be widened depending on the type of excavated soil. You can. Further, the mounting plate 14 may be attached to the casing 6 by welding. In addition, the present invention can be modified in various ways without departing from its basic technical idea.

Effects of the invention As described above, according to the invention, the ground is excavated by rotating the stirring shaft, the first stirring blade, the casing, the second stirring shaft, etc. in opposite directions, and the excavated soil is The first and second stirring blades, which rotate in opposite directions, can prevent the excavated soil between them from rotating together with the stirring blades, thereby preventing the lifting and lowering of the stirring shaft, casing, etc. It is possible to uniformly stir and mix excavated soil and solidifying agent by reducing the number of repetitions. Therefore, even if the excavated ground is sticky soil with strong adhesion, the soil and solidifying agent in the excavated ground can be uniformly stirred and mixed, and the strength, leakage prevention effect, etc. can be improved. At the same time, it is possible to improve work efficiency, and furthermore, it is possible to prevent wasteful consumption of the solidifying agent and improve economic efficiency.

The second stirring blades are each fixed to a mounting plate, and each mounting plate is fixedly attached so as to close the mounting hole formed in the casing, so that each stirring blade is mounted inside the casing. , the casing, the second stirring blade, the stirring shaft, the first stirring blade, etc. can be easily assembled.

[Brief explanation of the drawing]

1 to 4 show a stirring and mixing device according to an embodiment of the present invention, and FIG. 1 is an overall front view;
FIG. 2 is a right side view thereof, FIG. 3 is an enlarged perspective view of the main part, and FIG. 4 is an enlarged horizontal sectional view thereof. 4... Drive device, 6... Casing, 8... Stirring shaft, 11... First stirring blade, 12... Second stirring blade, 13... Mounting hole, 14... Mounting plate.

Claims (1)

[Claims for Utility Model Registration] (1) A drive device that is supported so as to be movable up and down along the guide rail of the leader mast, and a drive device that is rotatably and integrally linked to the underside of this drive so that it can be movable up and down. a casing, a stirring shaft disposed inside the casing and linked to the drive device so as to be rotatable in the opposite direction to the casing and to be able to rise and fall integrally; and a plurality of stirring shafts arranged along the axial direction of the stirring shaft a first stirring blade attached to the stage; and a second stirring blade installed in the casing in multiple stages along the axial direction and at a different axial position from the first stirring blade. Equipped with a stirring and mixing device. (2) the second stirring blades are respectively fixed to the mounting plate;
2. The stirring and mixing device according to claim 1, wherein each mounting plate is fixedly mounted so as to close a mounting hole formed in the casing, and each stirring blade is mounted within the casing.