JP2023037950A - Agitating device and mechanical agitating method using the same - Google Patents

Abstract

To efficiently agitate a ground formation soil and an improvement material, and improve construction speed.SOLUTION: An agitation device 10 comprises a body part 12 which has an agitation blade 14 for agitating the ground by a plurality of cutting blades 16 and is provided with a discharge port for supplying an improvement material and/or air, and an auxiliary blade 20 which is mounted on the rear end side of the agitation blade 14 of the body part 12 so as to be axially rotatable. The auxiliary blade 20 includes a shaft part 22 and an auxiliary blade 24 provided on the outer periphery of the shaft part 22, and the agitation blade 24 is composed of a plurality of plate blades 26 the plate surfaces of which are inclined in the same direction relative to the rotation direction of the shaft part 22 or one or more spirally installed plate-like members. Thereby, when the agitation device 10 penetrates into the ground, a soil pressure is reduced by removed earth by forward rotation of the auxiliary blade 20, and when the agitation device 10 is extracted from the ground, agitation is promoted by feeding sediment to the agitation blade by reverse rotation of the auxiliary blade 20, so that a ground formation soil and an improvement material are efficiently agitated, and construction speed can be improved.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to an agitating device that is attached to a working machine of a heavy machine and agitates ground while supplying improving material and/or air, and a mechanical agitating construction method using the same.

When constructing various buildings, ground improvement is carried out if the local ground is soft. There are various methods for ground improvement, one of which is the mechanical agitation method, in which an agitation blade is rotated by a motor or chain drive while supplying an improvement material such as a slurry of cement-based solidification material. , the ground-forming soil and the improvement material are mixed and stirred by the stirring blade, and the improvement material is created in the ground. A stirring device equipped with such stirring blades is usually used by being attached to a heavy machine (see, for example, Patent Document 1).

JP 2007-277955 A

Here, when excavating with a stirring device, if a large amount of improvement material such as cement slurry discharged into the ground accumulates in the ground together with the excavated soil, the soil pressure increases and the excavation speed is adversely affected. there were. In addition, due to the event that the agitated soil mass is pushed up by the discharged cement slurry, etc., the soil mass part that is immaturely improved is generated. It took a long time to build.
The present invention has been made in view of the above problems, and its object is to efficiently stir the ground-forming soil and the improvement material to improve the construction speed.

(Mode of Invention)
The following aspects of the invention exemplify configurations of the present invention, and will be described separately in order to facilitate understanding of the various configurations of the present invention. Each term does not limit the technical scope of the present invention, and while considering the best mode for carrying out the invention, replaces, deletes, or further The technical scope of the present invention can also include the addition of the constituent elements.

(1) A stirring device that is attached to a working machine of a heavy machine and stirs the ground while supplying improving material and/or air, and has a stirring blade attached to the tip that stirs the ground with a plurality of cutting blades while rotating. , a rod-shaped body portion provided with a discharge port for supplying the improving material and / or air in the vicinity of the stirring blade, and the extension of the body portion on the rear end side of the stirring blade of the body portion an elongated aileron mounted axially rotatably along the direction in which the aileron is present, the aileron including a shaft portion and auxiliary blades provided along the outer circumference of the shaft portion; The auxiliary blade is composed of a plurality of plate blades whose plate surfaces are inclined in the same vertical and horizontal directions with respect to the rotation direction of the shaft, or one or more plate-like members installed in a spiral shape. A stirring device (claim 1).

The agitator described in this section is used by being attached to a working machine of a heavy machine, and includes a main body and ailerons. The main body has a rod shape, and a stirring blade having a plurality of cutting blades is attached to its tip. That is, the main body portion is attached to a working machine of a heavy machine at its rear end side, and the agitating blade at the front end side is rotated, so that the ground is excavated by a plurality of cutting blades while penetrating into the ground. there is Furthermore, the main body is provided with a discharge port for supplying the improving material and / or air near the stirring blade, and by excavating the ground while supplying the improving material and / or air from the discharge port , the ground-forming soil and the improvement material and/or air are mixed and agitated.

The aileron is an elongated one attached along the extending direction of the main body at a position on the rear end side of the stirring blade of the main body, and is attached to the main body so as to be axially rotatable. Further, the auxiliary blade includes a shaft portion and auxiliary blades provided along the outer circumference of the shaft portion, and the auxiliary blades are composed of a plurality of plate blades or one or more plate-like members. Specifically, when the auxiliary blade is composed of a plurality of plate blades, the plate surfaces of the plurality of plate blades are tilted in the same vertical and horizontal directions with respect to the rotation direction of the shaft. It is provided on the outer periphery of the part. That is, when each of the plurality of plate blades is viewed from the front toward the outer peripheral surface of the shaft portion with the extending direction of the shaft portion being the vertical direction, the two plate surfaces are oriented in the upper left direction and the lower right direction. All of them are tilted in the same direction, either facing upwards, or two plate surfaces facing downwards to the left and upwards to the right.

On the other hand, when the auxiliary blade is composed of one or more plate-shaped members, the plate-shaped member is installed in a continuous spiral shape on the outer circumference of the shaft when there is one plate-shaped member, and intermittently when there are two or more plate-shaped members. It is installed on the outer circumference of the shaft portion in a spiral shape. That is, in this case as well, the one or more plate-like members are arranged so that when viewed from the front from an arbitrary position toward the outer peripheral surface of the shaft with the shaft extending in the up-down direction, the plate-like members are arranged in two directions. It is uniformly tilted in such a manner that two plate faces face leftward and rightward directions, or two plate faces face leftward and rightward directions. As a result, when the aileron is rotated in one direction (forward direction), the tilted aileron blade exerts an upward force (toward the rear end) on the surroundings, causing the aileron to rotate in the other direction (reverse direction). Then, a downward (toward the tip) force is applied to the surroundings by the inclined auxiliary blades.

Therefore, in the agitating device according to this section, when the ground is excavated, the aileron is rotated in the forward direction, so that the earth and sand excavated by the agitating blade and positioned near the tip of the main body are agitated. It is discharged toward the ground by the aileron aileron blades located on the trailing edge of the wing. As a result, the soil pressure in the ground is reduced, and the excavation efficiency is improved. In addition, when pulling out from the ground, the aileron is rotated in the opposite direction, so that the soil around the aileron is forcibly stirred and sent toward the agitating blade, where it is stirred by the agitating blade. It will be. As a result, it becomes difficult for the soil clods that are immaturely improved to form a dense solidified body. Furthermore, the need for re-stirring and an increase in the number of blade cuttings is eliminated, and the ground-forming soil and the improvement material are efficiently stirred, so that the construction speed is improved.

(2) In the above item (1), the agitator (claim 2), wherein the shaft portion has a hollow tubular shape and is configured to discharge the improving material or air from the tip thereof through the interior thereof (claim 2).
In the agitator described in this section, the shaft portion of the aileron has a hollow tubular shape. It is configured to discharge the modifier or air from the tip of the shaft through the interior. As a result, in addition to the improvement material and air discharged from the main body, the improvement material and air are also discharged from the shaft of the aileron, so the ground formation soil and improvement material are stirred more efficiently. In addition, the adhesion of earth and sand to the stirring blades is suppressed by the discharge from the shaft portion toward the stirring blades.

(3) In items (1) and (2) above, the agitation blades are provided in a pair so as to sandwich the central axis of the main body, and the auxiliary blades are a pair of agitation blades when viewed in the axial direction of the main body. A pair of stirring devices provided at positions corresponding to (Claim 3).
The stirring device according to this section is provided with a pair of both the stirring blades and the auxiliary blades, the pair of stirring blades being provided in such a manner as to sandwich the central axis of the main body, and the pair of auxiliary blades are provided at positions corresponding to the pair of stirring blades when viewed in the axial direction of the main body. That is, when viewed in the axial direction of the main body, the positional relationship is such that one stirring blade overlaps at least a portion of one aileron, and the other stirring blade overlaps at least a portion of the other aileron. . As a result, excavation and agitation are performed in a well-balanced manner by the pair of agitating blades at positions across the central axis of the main body, and at the positions corresponding to the respective agitating blades, the soil is discharged and the agitating blades are discharged by the pair of auxiliary blades. of earth and sand is carried out. Therefore, the excavation of the soil-forming soil and the stirring of the soil-forming soil and the improvement material can be performed more efficiently.

(4) A stirring device according to (1) to (3) above, wherein the heavy machine is a hydraulic excavator or a leader-equipped hydraulic large-diameter drilling machine (claim 4).
The agitator described in this section is mainly used for construction work on shallow ground when the heavy equipment to be installed is a hydraulic excavator or a hydraulic large-diameter drilling machine with a leader, and the heavy equipment is a hydraulic excavator. Also, since hydraulic excavators can turn in a small radius, they can be used for construction work on site under various conditions. On the other hand, if the heavy equipment is a leader-equipped hydraulic large-diameter drilling machine, it will be able to handle work at various depths. It is expected to improve the construction accuracy in the vertical direction.

(5) A mechanical stirring method for improving the ground by using a stirring device that is attached to a working machine of a heavy machine and stirs the ground while supplying improving material and / or air, wherein the stirring device rotates. A rod-shaped main body portion provided with a stirring blade for stirring the ground with a plurality of cutting blades at the tip, and a discharge port for supplying the improving material and / or air in the vicinity of the stirring blade, and the main body a long aileron attached axially rotatably along the extending direction of the main body portion on the rear end side of the agitating blade of the section, the aileron comprising a shaft portion and the auxiliary blades provided along the outer periphery of the shaft, wherein the auxiliary blades are a plurality of plate blades whose plate surfaces are inclined in the same direction in the vertical direction and the horizontal direction with respect to the rotation direction of the shaft; It is composed of one or more spirally arranged plate-like members, and when the agitator is inserted, the aileron is axially rotated in the direction in which the surrounding earth and sand are moved upward, and when the agitator is pulled out, A mechanical stirring construction method in which the aileron is axially rotated in a direction in which surrounding earth and sand are moved downward (Claim 5).

(6) In the above (5), a mechanical agitation method (Claim 6) in which the improving material or air is discharged from the tip through the interior of the hollow tubular shaft portion (Claim 6).
(7) In items (5) and (6) above, a pair of the stirring blades are provided so as to sandwich the central axis of the main body, and the auxiliary blades are attached to the pair of stirring blades when viewed in the axial direction of the main body. A mechanical stirring method in which a pair is provided at corresponding positions (Claim 7).

(8) In the above items (5) to (7), a mechanical stirring method using a hydraulic excavator or a hydraulic large-diameter drilling machine with a leader as the heavy machine (claim 8).
Then, the mechanical stirring method described in items (5) to (8) is performed using the stirring apparatus described in items (1) to (4), respectively, thereby achieving items (1) to (4). Equivalent action corresponding to the agitator of .

Since the present invention is configured as described above, it is possible to efficiently stir the ground-forming soil and the improvement material and improve the construction speed.

1A and 1B are a side view and a front view of a stirring device according to an embodiment of the present invention; FIG. FIG. 2 is a construction image diagram showing a state of penetrating into the ground when improving the ground using the stirring device of FIG. 1 ; FIG. 2 is a construction image diagram showing a state at the time of pulling out from the ground when improving the ground using the agitating device of FIG. 1 ; FIG. 2 is an image diagram showing a configuration of an auxiliary blade of an auxiliary blade different from that of the agitator of FIG. 1;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. Here, detailed description of the same or corresponding parts as in the prior art is omitted, and the same or corresponding parts are indicated by the same reference numerals throughout the drawings.
FIG. 1 schematically shows the configuration of a stirring device 10 according to an embodiment of the invention. As illustrated, the stirring device 10 according to the embodiment of the present invention includes a main body portion 12 having a pair of stirring blades 14 (14A, 14B) attached to its tip, a pair of ailerons 20 (20A, 20B), and A mounting portion 50 is included.

The main body part 12 constitutes the main body part of the stirring device 10, is shaped like a hollow rod, and has a plurality of members attached to its outer and inner sides. For example, the main body 12 is attached with a pipe (not shown) for supplying an improvement material for ground improvement and air, and the pipe is covered with a steel cover 54 or the like. It extends to the vicinity of 14. Then, the improving material and air are supplied through the inside of the pipe from the improving material and air supply source connected to the rear end of the pipe, and the improving material and/or air are discharged from the outlet at the tip of the pipe. It has become so. In addition, two such pipes may be provided so as to supply the improving material and air separately, and the improving material and air are supplied from one pipe at the same time or separately by switching the supply source. It may be something to do.

The pair of stirring blades 14 are positioned so that they sandwich the central axis of the main body 12, with one stirring blade 14A positioned on the left side in FIG. 1(b) and the other stirring blade 14B positioned on the right side in FIG. 1(b). , opposite to each other with the tip portion 12a of the main body portion 12 interposed therebetween. Each of the pair of stirring blades 14A and 14B is provided with a plurality of cutting blades 16 on its outer periphery and is rotated by a motor, which will be described later. Also, the pair of stirring blades 14A and 14B are attached to the tip portion 12a of the body portion 12 so that each rotating shaft is orthogonal or substantially orthogonal to the extending direction of the body portion 12 (vertical direction in FIG. 1). there is In the embodiment of FIG. 1, the angle formed between each rotation axis and the extending direction of the body portion 12 becomes smaller than 90° toward the tip side (lower side in the drawing) of the body portion 12. As such, it is slightly slanted.

A pair of stirring blades 14A and 14B each incorporates a motor (not shown). These motors rotate each of the stirring blades 14A and 14B using, for example, power (oil pressure, etc.) supplied from the heavy equipment 70 (see FIGS. 2 and 3). Power is supplied. Further, these motors may individually control the rotation direction, rotation speed, rotation torque, and the like of the stirring blades 14 . With such a configuration, during construction using the stirring device 10, the pair of stirring blades 14A and 14B are rotated by the motors incorporated therein, and the plurality of cutting blades 16 rotating along the outer circumference of the stirring blades 14A and 14B. Thus, the ground G (see FIGS. 2 and 3) is excavated and stirred.

The pair of ailerons 20 are provided at positions corresponding to the pair of agitation vanes 14, and as shown in FIG. The other auxiliary blade 20B is provided above the stirring blade 14B. That is, when viewed in the axial direction of the main body 12, there is a positional relationship in which one stirring blade 14A and one auxiliary blade 20A overlap, and there is a positional relationship in which the other stirring blade 14B and the other auxiliary blade 20B overlap. Each of the pair of auxiliary wings 20A and 20B has a hollow tubular shaft portion 22 and auxiliary blades 24 provided on the outer periphery of the shaft portion 22 in this embodiment.

Each of the pair of ailerons 20A and 20B is attached to the body portion 12 along the extension direction of the body portion 12 so as to be axially rotatable. Specifically, the ailerons 20A and 20B extend downward (front end side) from the base portion 40 installed above the main body portion 12 (rear end side) to the vicinity of the stirring blade 14, and the middle portion thereof is It is rotatably supported by a support member 42 connected to the main body 12 . The base portion 40 is provided with two motors 34 that are rotated by power such as hydraulic pressure supplied from the heavy machine 70. These two motors 34 rotate the ailerons 20A and 20B individually. It's like Each of the motors 34 can control the direction of rotation of the shaft of the aileron 20, and may also control the number of revolutions and rotational torque. The pair of ailerons 20A and 20B is preferably detachably attached to the main body 12. As shown in FIG.

The shaft portion 22 of each aileron 20 has a hollow tubular shape as described above, and for example, via a swivel connected to the rear end, it is supplied with the improving material and air as well as the piping of the main body portion 12. Connected. Then, the modifier and/or air supplied through the inside of the shaft portion 22 is discharged from the discharge port 36 at the tip of the shaft portion 22 toward the stirring blades 14 corresponding to the auxiliary blades 20 . Either one of the improving material and air may be supplied from the shaft portion 22 of each aileron 20, or the improving material and air may be mixed and supplied at the same time. A switch may provide a selected one of the modifier and air.

The auxiliary blade 24 of each aileron 20 is composed of a plurality of plate blades 26 in this embodiment. For example, when checking one aileron 20A in FIG. The ten plate blades 26 protrude from the outer circumference of the shaft portion 22 to the right side in the drawing, and the plate blades 26 inclined downward toward the front side in the drawing protrude from the outer circumference of the shaft portion 22 to the left side in the drawing. Plate blades 26 inclined downward toward the inner depth side are alternately provided along the shaft portion 22 in the vertical direction. More specifically, each of the plate blades 26 that protrude to the right in FIG. The plate faces downward and to the right. These five plate blades 26 are illustrated by dashed lines in FIG. is shown left-to-right opposite to the above.

In addition, each of the plate blades 26 projecting leftward in FIG. 2(b) is viewed from the left in FIG. Orientation, the other plate surface opposite to it is facing in the lower right direction. These five plate blades 26 are shown by solid lines in FIG. That is, each of the ten plate blades 26 has two plate surfaces oriented in the upper left direction and the lower right direction when viewed from the front toward the outer periphery of the shaft portion 22 . When the aileron 20A having the aileron 24 having such a configuration is rotated counterclockwise when viewed from above in FIG. 1, an upward force in FIG. , clockwise, a downward force in FIG.

On the other hand, as can be seen in FIG. 1(b), the other aileron 20B has ten plate blades 26 arranged symmetrically with the one aileron 20A. That is, each of the ten plate blades 26 of the aileron 20B has two plate surfaces oriented in the upper right direction and the lower left direction when viewed from the front toward the outer circumference of the shaft portion 22 . Therefore, when the aileron 20B is rotated clockwise as viewed from above in FIG. 1, an upward force in FIG. Then, a downward force in FIG. Therefore, during construction using the agitating device 10, the pair of ailerons 20 are axially rotated in an arbitrary direction by the motor 34, and the surrounding earth and sand are agitated and moved by the plurality of plate blades 26 that rotate and move accordingly. It will be.

On the other hand, as shown in FIGS. 2 and 3, the mounting portion 50 is for mounting the main body portion 12 having the above configuration to the work machine 72 of the hydraulic excavator 70A as the heavy machine 70 in the present embodiment. It is. More specifically, in the mounting portion 50, the front end of the body portion 12 faces downward in front of the hydraulic excavator 70A (the front side in the drawing), and the pair of stirring blades 14A and 14B and the pair of ailerons 20A and 20B are The main body 12 is attached to the working machine 72 so as to be positioned on the left and right sides (left and right sides in the drawing) of the hydraulic excavator 70A. The agitating device 10 attached to the hydraulic excavator 70</b>A in this manner is vertically moved by the operation of the working machine 72 and swiveled by the turning of the working machine 72 .

Next, with reference to FIGS. 2 and 3, a mechanical stirring method according to an embodiment of the present invention, in which the ground G is stirred and improved using the stirring device 10 having the configuration described above, will be described. . For the configuration of the stirring device 10, refer to FIG. 1 as appropriate.
First, as shown in FIG. 2A, the stirring device 10 is attached to the work machine 72 of the heavy equipment 70 (hydraulic excavator 70A) via the attachment portion 50 . Then, excavation of the ground G is started by moving the stirring device 10 downward by operating the work machine 72 while rotating the pair of stirring blades 14 . Further, along with the rotation of the pair of stirring blades 14, the improving material and air are supplied from the discharge port (not shown) of the main body 12 to mix and stir the forming soil of the ground G and them.

Further, at the timing when the tips of the pair of ailerons 20 enter the ground G at the latest, the motor 34 causes the pair of ailerons 20 to axially rotate. At this time, as shown in FIG. 2(b), the direction of shaft rotation is the rotation direction (positive direction) in which the surrounding soil is pushed upward by the auxiliary blades 24 of the pair of auxiliary blades 20A and 20B. . Furthermore, depending on the situation, the improving material and air are supplied from the discharge ports 36 of the pair of ailerons 20 . Then, as shown in FIG. 2(b), the stirring device 10 continues to penetrate the ground G, and as shown in FIG. 2(c), the stirring device 10 penetrates to the design depth. During this penetration work, the rotation of the pair of stirring blades 14, the supply of the improving material and air from the main body 12, the forward shaft rotation of the pair of ailerons 20, and the improvement material and air from the pair of ailerons 20 supply, etc.

Subsequently, as shown in FIG. 3A, the direction of axial rotation of the pair of ailerons 20 by the motor 34 is pushed downward by the surrounding earth and sand by the aileron blades 24 of the pair of ailerons 20A and 20B. switch to the direction of rotation (reverse direction). Then, the working machine 72 is operated to move the stirring device 10 upward, and the extraction of the stirring device 10 from the ground G is started. Subsequently, the stirring device 10 is pulled out from the ground G as shown in FIG. 3(b), and as shown in FIG. 3(c), the stirring device 10 is pulled out until the pair of stirring blades 14 reaches the vicinity of the ground. During this extraction work, the rotation of the pair of stirring blades 14, the supply of the improving material and air from the main body 12, the opposite shaft rotation of the pair of ailerons 20, and the improvement material and air from the pair of ailerons 20 supply, etc. The improved soil S is formed in the ground G by this.

Here, the stirrer 10 according to the embodiment of the present invention is not limited to the configurations shown in FIGS. 1 to 3, and may have other configurations. For example, the auxiliary blades 24 of the aileron 20 may be composed of more or fewer plate blades 26 than in FIG. The angle, the distance between the plate blades 26 adjacent in the extending direction of the shaft portion 22, the direction in which the shaft portion 22 protrudes from the shaft portion 22 when viewed in the axial direction, and the like are arbitrary. Furthermore, as shown in FIG. 4, the auxiliary blades 24 of the auxiliary blades 20 may be composed of a plate-like member 28 spirally installed around the shaft portion 22. Such a plate-like member 28 is Two or more may be intermittently provided. Further, the stirring device 10 may be attached to a leader-equipped large-diameter hydraulic drilling machine as the heavy machine 70 and used. It is mounted so that it can move up and down.

Now, according to the embodiment of the present invention having the above configuration, it is possible to obtain the following effects. That is, the stirring device 10 according to the embodiment of the present invention is used by being attached to a work machine 72 of a heavy machine 70, as shown in FIGS. 2 and 3. As shown in FIG. It includes a body portion 12 and an aileron 20 . The main body 12 has a rod shape, and a stirring blade 14 having a plurality of cutting blades 16 is attached to its tip. That is, with the rear end side of the main body 12 attached to the work machine 72 of the heavy machine 70, the stirring blade 14 on the front end side is rotated, so that the main body part 12 is penetrated into the ground G by the plurality of cutting blades 16. is to be excavated. Further, the main body 12 is provided with a discharge port for supplying the improving material and/or air in the vicinity of the stirring blade 14, and the ground G is excavated while supplying the improving material and/or air from the discharge port. By doing so, the forming soil of the ground G, the improvement material and/or the air can be mixed and stirred.

The aileron 20 is an elongated one attached along the extending direction of the main body 12 at a position closer to the rear end than the stirring blade 14 of the main body 12. At this time, the main body 20 is axially rotatable. 12 is attached. Further, the auxiliary blade 20 includes a shaft portion 22 and auxiliary blades 24 provided along the outer periphery of the shaft portion 22. The auxiliary blades 24 are composed of a plurality of plate blades 26 or one or more plate-shaped members 28. (See FIG. 4). Specifically, when the auxiliary blade 24 is composed of a plurality of plate blades 26, the plate surfaces of the plurality of plate blades 26 are inclined in the same vertical and horizontal directions with respect to the rotation direction of the shaft portion 22. It is provided on the outer circumference of the shaft portion 22 in a state. That is, when each of the plurality of plate blades 26 is viewed from the front toward the outer peripheral surface of the shaft portion 22 in a state in which the extending direction of the shaft portion 22 is the vertical direction, the two plate surfaces of the plate blades are in the upper left direction and the upper left direction. All of them are tilted in the same direction, such as a mode facing the lower right direction, or a mode in which the two plate surfaces face the lower left direction and the upper right direction.

On the other hand, as shown in FIG. 4, when the auxiliary blade 24 is composed of one or more plate-like members 28, the plate-like member 28 has a continuous helical shape on the outer circumference of the shaft portion 22 when there is one plate-like member. , and when there are two or more, they are installed in an intermittent spiral on the outer circumference of the shaft portion 22 . That is, even in this case, the one or more plate-like members 28 are in a state in which the extending direction of the shaft portion 22 is the vertical direction, and when viewed from the front from an arbitrary position toward the outer peripheral surface of the shaft portion 22 In addition, the two plate surfaces are uniformly inclined such that the two plate surfaces face the upper left direction and the lower right direction, or the two plate surfaces face the lower left direction and the upper right direction. As a result, when the aileron 20 is axially rotated in one direction (forward direction), an upward force (toward the rear end) can be applied to the surroundings by the tilted aileron blade 24, and the aileron 20 can be rotated in the other direction (reverse direction). direction), the tilted auxiliary blades 24 can exert a downward (toward the tip) force on the surroundings.

Therefore, in the agitator 10 according to the embodiment of the present invention, as shown in FIG. The earth and sand positioned near the tip of the main body 12 that has been stirred can be discharged toward the ground by the auxiliary blades 24 of the auxiliary blades 20 positioned on the rear end side of the stirring blade 14 . As a result, the soil pressure in the ground G can be reduced, so that excavation efficiency can be improved. In addition, as shown in FIG. 3, when pulling out from the ground G, the aileron 20 is rotated in the opposite direction to forcibly agitate the earth and sand around the aileron 20 toward the stirring blade 14. It can be sent to and stirred by the stirring blade 14 . As a result, it becomes difficult for the clod portion of immature improvement to occur, so that a dense solidified body can be created. Furthermore, the need for re-stirring and an increase in the number of blade cuttings is eliminated, and the soil forming the ground G and the improvement material can be stirred efficiently, making it possible to improve the construction speed.

Further, in the stirring device 10 according to the embodiment of the present invention, as shown in FIG. When the improving material or air is supplied, the improving material or air is discharged from the discharge port 36 at the tip of the shaft portion 22 through the interior of the shaft portion 22 . As a result, in addition to the discharge of the improvement material and air from the main body portion 12, the improvement material and air can also be discharged from the shaft portion 22 of the aileron 20, so that the formation soil of the ground G and the improvement material can be further discharged. Stirring can be performed efficiently, and adhesion of earth and sand to the stirring blades 14 can be suppressed by discharging the mixture from the discharge port 36 of the shaft portion 22 toward the stirring blades 14 .

Furthermore, the stirring device 10 according to the embodiment of the present invention is provided with a pair of both the stirring blades 14 and the auxiliary blades 20. The pair of auxiliary blades 20A and 20B are provided in a sandwiched manner, and the pair of auxiliary blades 20A and 20B are provided at positions corresponding to the pair of stirring blades 14A and 14B when viewed in the axial direction of the main body 12 . That is, when viewed in the axial direction of the main body 12, one stirring blade 14A and one auxiliary blade 20A are at least partially overlapped, and the other stirring blade 14B and the other auxiliary blade 20B are at least partially overlapped. It is provided in a positional relationship. As a result, excavation and stirring can be performed in a well-balanced manner by the pair of stirring blades 14A and 14B at positions across the central axis of the main body 12, and at positions corresponding to the respective stirring blades 14A and 14B, a pair of The ailerons 20A and 20B can be used to unload soil and feed earth and sand to the stirring blades 14A and 14B. Therefore, excavation of the forming soil of the ground G and stirring of the forming soil of the ground G and the improvement material can be performed more efficiently.

In addition, as shown in FIGS. 2 and 3, the stirring device 10 according to the embodiment of the present invention is mainly intended for shallow ground G when the heavy machine 70 to which it is attached is a hydraulic excavator 70A. Since the hydraulic excavator 70A can be used in many constructions and can turn in a small radius, it can be used for constructions on site under various conditions. On the other hand, if the heavy machine 70 to which the leader is attached is a hydraulic large-diameter drilling machine, it is possible to handle construction work at various depths. acts as a guide for the agitating device 10, an improvement in construction accuracy in the vertical direction can be expected.
On the other hand, the mechanical stirring method according to the embodiment of the present invention is executed using the stirring device 10 according to the embodiment of the present invention as described above. can play.

10: stirring device, 12: main body, 14 (14A, 14B): stirring blade, 16: cutting blade, 20 (20A, 20B): auxiliary blade, 22: shaft, 24: auxiliary blade, 26: plate blade, 28: plate-shaped member, 70: heavy equipment, 70A: hydraulic excavator, 72: work machine, G: ground

Claims (8)

A stirring device that is attached to a working machine of a heavy machine and stirs the ground while supplying improving material and / or air,
A rod-shaped main body having a stirring blade attached to its tip for stirring the ground with a plurality of cutting blades while rotating, and having a discharge port for supplying the improving material and/or air in the vicinity of the stirring blade;
a long aileron attached axially rotatably along the extending direction of the main body on the rear end side of the stirring blade of the main body,
The aileron includes a shaft portion and auxiliary blades provided along the outer periphery of the shaft portion,
The auxiliary blade is composed of a plurality of plate blades whose plate surfaces are inclined in the same vertical and horizontal directions with respect to the rotation direction of the shaft portion, or one or more plate-like members arranged in a spiral shape. A stirring device characterized by: 2. The stirrer according to claim 1, wherein the shaft portion is hollow and tubular, and configured to discharge the improving material or air from the tip thereof through the interior thereof. A pair of the stirring blades are provided so as to sandwich the central axis of the main body,
3. The agitator according to claim 1, wherein a pair of said auxiliary blades are provided at positions corresponding to said pair of said agitation blades when viewed in the axial direction of said main body. 4. The agitator according to any one of claims 1 to 3, wherein the heavy machine is a hydraulic excavator or a leader-equipped hydraulic large-diameter drilling machine. A mechanical stirring method for improving the ground by using a stirring device that is attached to a working machine of a heavy machine and stirs the ground while supplying an improving material and / or air,
The agitating device is rod-shaped and has a stirring blade attached to its tip that agitates the ground with a plurality of cutting blades while rotating, and a discharge port for supplying the improving material and/or air in the vicinity of the agitating blade. and a long aileron attached axially rotatably along the extending direction of the main body on the rear end side of the stirring blade of the main body,
The aileron includes a shaft portion and auxiliary blades provided along the outer periphery of the shaft portion,
The auxiliary blade is composed of a plurality of plate blades whose plate surfaces are inclined in the same vertical and horizontal directions with respect to the rotation direction of the shaft portion, or one or more plate-like members arranged in a spiral shape. ,
When the agitator is inserted, the auxiliary blades are axially rotated in the direction in which the surrounding earth and sand are moved upward, and when the agitator is pulled out, the auxiliary blades are axially rotated in the direction in which the surrounding earth and sand are moved downward. A mechanical stirring method characterized in that 6. The mechanical stirring method according to claim 5, wherein the hollow tubular shaft portion is used, and the improving material or air is discharged from the tip through the inside of the shaft portion. A pair of the stirring blades are provided so as to sandwich the central axis of the main body,
7. The mechanical stirring method according to claim 5, wherein a pair of said auxiliary blades are provided at positions corresponding to said pair of said stirring blades when viewed in the axial direction of said main body. 8. The mechanical stirring method according to any one of claims 5 to 7, wherein a hydraulic excavator or a leader-equipped hydraulic large-diameter drilling machine is used as the heavy machine.

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