Ground agitation device

Abstract

To prevent sediment from entering between two unit agitation blade substrates.SOLUTION: A ground agitation device includes first and second agitation bodies mounted on both sides of a rotary shaft. The first agitation body comprises a first unit agitation blade body and a second unit agitation blade body where a plurality of agitation claws is arrayed, and the second agitation body comprises a third unit agitation blade body and a fourth unit agitation blade body where a plurality of agitation claws is arrayed. Each of the first to fourth unit agitation blade bodies includes: a unit agitation blade base body mounted on the rotary shaft; an agitation claw mounting pedestal connected to the unit agitation blade base body; and a plurality of agitation claws arrayed along an outside surface of the agitation claw mounting pedestal. The plurality of agitation claws is spaced apart from each other along the rotary shaft direction on the agitation claw mounting pedestal. Each unit agitation blade base body out of the first to fourth unit agitation blade bodies includes: two unit agitation blade substrates opposing each other; and two side plates for covering both side parts between the two unit agitation blade substrates, and extending from each agitation claw mounting pedestal.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a ground mixing device for strengthening soft ground by mixing soil and a soil improver such as cement milk while excavating the ground. [Background technology]

[0002] 2. Description of the Related Art Conventionally, as a ground mixing device for strengthening the ground, as shown in Patent Document 1, for example, a ground mixing device capable of efficiently mixing soil and sand up and down, front and rear, and left and right has been known.

[0003] Specifically, in the ground stirring device described in Patent Document 1, the rotation of a hydraulic motor is transmitted to a first and a second stirring body by a first and a second chain mechanism. The first stirring body has a first unit stirring blade body having four stirring claws arranged diagonally from the outside to the inside, and a second unit stirring blade body having four stirring claws arranged diagonally from the inside to the outside. The second stirring body has a third unit stirring blade body having four stirring claws arranged diagonally from the outside to the inside, and a fourth unit stirring blade body having four stirring claws arranged diagonally from the inside to the outside. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-231691 A Summary of the Invention [Problem to be solved by the invention]

[0005] In such a conventional ground mixing device, as the first and second mixing bodies rotate, the soil is moved not only vertically but also alternately from the outside to the inside and from the inside to the outside. This allows the soil to be sufficiently mixed in the vertical, front-back and left-right directions.

[0006] In the above-mentioned conventional ground mixing device, each of the first to fourth unit agitating blades is composed of four agitating blades, an agitating blade mounting base on which the four agitating blades are attached, and two unit agitating blade base plates connected to both ends of the agitating blade mounting base. The two unit agitating blade base plates are attached to the rotating shaft. The agitator blade mounting bases of the first and third unit agitator blade bodies are arranged diagonally with respect to the two unit agitator blade bases so that the four agitator blades are arranged diagonally from the outside to the inside. The agitator blade mounting bases of the second and fourth unit agitator blade bodies are arranged diagonally with respect to the two unit agitator blade bases in a direction different from that of the first and third unit agitator blade bodies so that the four agitator blades are arranged diagonally from the inside to the outside. The two unit agitating blade bases attached to both ends of each agitating blade mounting base are spaced apart at a specified distance in the longitudinal direction of the rotating shaft, which can cause the agitated soil to get in between the two unit agitating blade bases, resulting in soil clogging and resistance to agitation.

[0007] The configuration of the unit agitating blade body will be described with reference to Figs. 14 and 15, taking the first unit agitating blade body as an example. As shown in Figures 14 and 15, the first unit agitator blade body 141a is composed of four agitator blades Ba11 to Ba14, an agitator blade mounting base 146a on which the four agitator blades Ba11 to Ba14 are mounted, and two unit agitator blade substrates 145a, 145b connected to both ends of the agitator blade mounting base 146a, respectively. As shown in Figure 15, the two unit agitator blade substrates 145a, 145b are arranged at a predetermined distance d apart in the longitudinal direction of the rotating shaft, so that when the unit agitator blade body 141a is rotated around the rotating shaft, as shown in Figure 15, the agitated soil and sand may get into the gap between the two unit agitator blade substrates 145a, 145b, causing clogging and resulting in resistance to agitation.

[0008] In view of the above-mentioned problems, an object of the present invention is to provide a ground stirring device configured so as to prevent soil and sand from entering between two unit stirring blade base plates. [Means for solving the problem]

[0009] (1) The ground mixing device according to an embodiment of the present invention comprises a drive motor and a chain mechanism for transmitting rotation of the drive motor; A first stirring body and a second stirring body are attached to both sides of a rotating shaft that is rotated by the chain mechanism, The first stirring body is composed of a first unit stirring blade body and a second unit stirring blade body in which a plurality of stirring tines are arranged, and the second stirring body is composed of a third unit stirring blade body and a fourth unit stirring blade body in which a plurality of stirring tines are arranged, Each of the first to fourth unit agitating blade bodies has a unit agitating blade base attached to the rotating shaft, an agitating blade mounting base connected to the unit agitating blade base, and the plurality of agitating blades arranged along an outer surface of the agitating blade mounting base, The plurality of stirring claws are arranged at intervals in the direction of the rotation shaft on the stirring claw mounting base, Each unit agitator blade base of the first to fourth unit agitator blade bodies is a ground mixing device having two opposing unit agitator blade bases and two side plates extending from each agitator claw mounting base covering both sides between the two unit agitator blade bases.

[0010] (2) In the ground mixing device of (1) above, it is preferable that the first unit agitating blade body and the second unit agitating blade body, and the third unit agitating blade body and the fourth unit agitating blade body are respectively arranged at angular intervals of 180 degrees from each other.

[0011] (3) In the above-mentioned ground mixing device (2), the mixing claw mounting base of the first unit mixing blade body is arranged at an angle with respect to the unit mixing blade base of the first unit mixing blade body so that the mixing claws are arranged obliquely from the inside to the outside with respect to the rotation direction of the rotating shaft, The agitation blade mounting base of the second unit agitation blade body is arranged at an angle with respect to the unit agitation blade base of the second unit agitation blade body so that the agitation blades are arranged obliquely from the outside to the inside with respect to the rotation direction of the rotation shaft, The agitation blade mounting base of the third unit agitation blade body is arranged at an angle with respect to the unit agitation blade base of the third unit agitation blade body so that the agitation blades are arranged obliquely from the outside to the inside with respect to the rotation direction of the rotation shaft, It is preferable that the agitator claw mounting base of the fourth unit agitator blade body is arranged at an angle relative to the unit agitator blade base of the fourth unit agitator blade body so that the multiple agitator claws are arranged obliquely from the inside to the outside with respect to the rotational direction of the rotating shaft.

[0012] (4) In any of the ground mixing devices (1) to (3) above, it is preferable that the mixing claw mounting base has a curved portion curved in an arc shape connected to the unit mixing blade base, and a reinforcing portion arranged to sandwich the unit mixing blade base along the longitudinal direction of the surface of the curved portion. Effect of the Invention

[0013] According to the present invention, it is possible to prevent soil and sand from entering between the two unit agitating blade substrates. [Brief description of the drawings]

[0014] [Figure 1] 1 is a side view showing an overview of a ground stirring device according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view used to explain a stirrer in the ground stirring device of the first embodiment of the present invention. [Diagram 3] FIG. 1 is a diagram showing a configuration of a ground stirring device according to a first embodiment of the present invention. [Figure 4] FIG. 1 is a side view of a ground stirring device according to a first embodiment of the present invention. [Diagram 5] 2A and 2B are left and right side views and a front view used to explain the first and second stirring bodies of the present invention. [Figure 6] FIG. 2 is an exploded perspective view of one unit agitator blade base. [Figure 7] FIG. 2 is a perspective view of one unit agitator blade base. [Figure 8] FIG. 2 is a perspective view showing a configuration in which an agitating blade mounting base is mounted on one unit agitating blade base. [Figure 9] FIG. 2 is a front view showing a configuration in which an agitating blade mounting base is mounted on one unit agitating blade base. [Figure 10] 10 is a view of the C1-C2 cross section of FIG. 9 as seen from the rotating shaft side. [Figure 11] FIG. 2 is a perspective view showing a state in which a unit agitating blade base a is attached to a circular mounting member. [Figure 12] FIG. 1 is a diagram showing two stirring bodies rotating in one direction. [Figure 13] 13 is a diagram for explaining the operation of directing soil and sand from the outside to the inside and the operation of directing soil and sand from the inside to the outside. FIG. [Figure 14] FIG. 1 is a cross-sectional view used to explain a conventional ground mixing device. [Figure 15] FIG. 1 is a cross-sectional view for explaining a problem with a conventional ground stirring device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 shows an outline of a ground mixing device to which the present invention is applied.

[0016] In Fig. 1, a movable arm 102 is extended from a work vehicle 101. The movable arm 102 is made up of arms 102a and 102b that are connected so as to be able to be bent. A ground mixing device 100 according to an embodiment of the present invention is attached to the tip of the movable arm 102. The ground mixing device 100 can be moved vertically up and down relative to the ground by operating the movable arm 102.

[0017] FIG. 2 is an explanatory diagram of a mixing operation using the ground mixing device according to the embodiment of the present invention. As shown in FIG. 2, the ground mixing device 100 is composed of an upper support 11, a lower support 23, and mixers 30a and 30b. When strengthening the ground of soft soil, as shown in FIG. 2(A), the tip of the ground mixing device 100 is positioned above the soil 120. Then, as shown in FIG. 2(B), the mixers 30a and 30b are rotated while the movable arm 102 is driven to move the ground mixing device 100 downward. When the ground mixing device 100 is moved downward, the soil 120 is excavated by the mixers 30a and 30b as the ground mixing device 100 moves.

[0018] At this time, a soil modifier such as slurry or powdered cement is introduced from the work vehicle 101 to the tip of the ground mixing device 100. This soil modifier is discharged into the ground from the injection nozzle 30c provided at the tip of the ground mixing device 100. As a result, the soil and the soil modifier are mixed and stirred while the soil is excavated by the agitators 30a and 30b.

[0019] In this way, in the ground stirring device of the embodiment of the present invention, by rotating the stirrers 30a and 30b provided at the tip of the device, the soil can be excavated and stirred at the same time, thereby performing ground improvement work on soft soil.

[0020] Figures 3 and 4 show the configuration of a ground mixing device 100 according to this embodiment. In Figures 3 and 4, the interior of the vertically long upper support body 11 and lower support body 23 is a space, which is sealed from the outside, and endless chains 25, 26 are inserted into these spaces, respectively, to protect the spaces from intrusion of soil and sand. A hydraulic motor 12 is disposed above the vertically long upper support body 11. A sprocket 14 is fitted onto a drive shaft 13 of the hydraulic motor 12.

[0021] An intermediate shaft 20 is provided at the connection between the upper support 11 and the lower support 23. Sprockets 21 and 22 are fitted onto the intermediate shaft 20. An endless chain 25 is suspended between the sprocket 14 of the drive shaft 13 of the hydraulic motor 12 and the sprocket 21 of the intermediate shaft 20.

[0022] Agitators 30a and 30b are disposed below the lower support 23. Sprockets 32 are fitted onto the rotating shafts 31a and 31b of the agitators 30a and 30b. An endless chain 26 is suspended between the sprocket 22 of the intermediate shaft 20 and the sprockets 32 of the agitators 30a and 30b.

[0023] The driving force of the hydraulic motor 12 is transmitted to the agitators 30a and 30b via endless chains 25 and 26. That is, when the hydraulic motor 12 rotates, the rotation is transmitted from the drive shaft 13 of the hydraulic motor 12 to the intermediate shaft 20 via the endless chain 25. Then, when the intermediate shaft 20 rotates, the rotation is transmitted from the intermediate shaft 20 to the rotating shafts 31a and 31b of the agitators 30a and 30b via the endless chain 26. The rotation speed of the hydraulic motor 12 and the supply of hydraulic pressure can be controlled from the outside via the oil supply path 16.

[0024] 5(A) to 5(C) are a left side view, a front view, and a right side view of the stirrers 30a and 30b. As shown in Figures 5(A) to (C), the stirring body 30a is provided with two unit stirring blade bodies 41a and 41b, and the stirring body 30b is provided with unit stirring blade bodies 41c and 41d. The unit stirring blade body 41a and the unit stirring blade body 41b, and the unit stirring blade body 41c and the unit stirring blade body 41d are respectively disposed at angular intervals of 180 degrees from each other. The unit stirring blade body 41a, the unit stirring blade body 41b, the unit stirring blade body 41c, and the unit stirring blade body 41d correspond to the first to fourth unit stirring blade bodies. Four agitating blades Ba1 to Ba4 are arranged (arranged) in the unit agitating blade body 41a, three agitating blades Bb1 to Bb3 are arranged (arranged) in the unit agitating blade body 41b, three agitating blades Bc1 to Bc3 are arranged (arranged) in the unit agitating blade body 41c, and four agitating blades Bd1 to Bd4 are arranged (arranged) in the unit agitating blade body 41d. When the rotating shafts 31a and 31b rotate, the unit agitating blade bodies 41a, 41b and the unit agitating blade bodies 41c and 41d rotate accordingly, and the soil is excavated by the agitating blades Ba1 to Ba4, Bb1 to Bb3, and Bc1 to Bc3, Bd1 to Bd4.

[0025] Here, an example is shown in which four agitating claws Ba1 to Ba4 are arranged on unit agitating blade body 41a, three agitating claws Bb1 to Bb3 are arranged on unit agitating blade body 41b, three agitating claws Bc1 to Bc3 are arranged on unit agitating blade body 41c, and four agitating claws Bd1 to Bd4 are arranged on unit agitating blade body 41d, but the number of agitating claws provided on unit agitating blade bodies 41a to 41d is not particularly limited as long as it is multiple. For example, the number of stirring tines of the unit agitating blade 41a and the unit agitating blade 41d may be five or more, and the number of stirring tines of the unit agitating blade 41b and the unit agitating blade 41c may be four or more. The number of stirring tines of the unit agitating blade 41a and the unit agitating blade 41d is one more than the number of stirring tines of the unit agitating blade 41b and the unit agitating blade 41c, but may be two or more more. The number of stirring tines provided on the unit agitating blades 41a to 41d may be the same. The number and size of the stirring tines provided on the unit agitating blades 41a to 41d are appropriately determined depending on the size of the unit agitating blades 41a to 41d, and the interval between the multiple stirring tines provided on the unit agitating blades 41a to 41d is appropriately determined depending on the size of the unit agitating blades 41a to 41d and the number of stirring tines. The size of the unit agitating blade bodies 41a to 41d, the number of agitating blades, and the intervals between the plurality of agitating blades can be changed according to the size of the ground agitating device.

[0026] The left agitator 30a has two unit agitator blades 41a and 41b as shown in Figures 5(A) and 5(B). The unit agitator blade 41a has a plurality of, for example, four agitator blades Ba1 to Ba4 arranged obliquely from the inside to the outside with respect to the rotation direction M1, and the unit agitator blade 41b has a plurality of, for example, three agitator blades Bb1 to Bb3 arranged obliquely from the outside to the inside with respect to the rotation direction M1.

[0027] The right agitator 30b has two unit agitator blades 41c and 41d, as shown in Figures 5(C) and 5(B). The unit agitator blade 41c has a plurality of, for example, three agitator blades Bc1-Bc3 arranged obliquely from the outside to the inside with respect to the rotation direction M1, and the unit agitator blade 41d has a plurality of, for example, four agitator blades Bd1-Bd4 arranged obliquely from the inside to the outside with respect to the rotation direction M1.

[0028] The left stirring member 30a will now be described in further detail. The unit agitating blade body 41a includes a unit agitating blade base 45a and an agitating blade mounting base 46a on which four agitating blades Ba1 to Ba4 are arranged. The unit agitating blade body 41b includes a unit agitating blade base 45b and an agitating blade mounting base 46b on which three agitating blades Bb1 to Bb3 are arranged. The agitating blade mounting bases 46a and 46b have arc-shaped curved portions 46af and 46bf and reinforcing portions 46as and 46bs. The reinforcing portions 46as and 46bs reinforce the arc-shaped curved portions 46af and 46bf so that they do not become distorted. Here, the reinforcing portions 46as and 46bs are arranged diagonally across the unit agitating blade bases 45a and 45b along the longitudinal direction of the arc-shaped rectangular surfaces of the curved portions 46af and 46bf, but may be arranged parallel to the longitudinal direction of the rectangular surfaces. 5(A) and 5(B), a circular mounting member 42a is fitted to the left rotating shaft 31a. A unit agitating blade base 45a and a unit agitating blade base 45b are attached to the mounting member 42a.

[0029] An agitation blade mounting base 46a is mounted on the unit agitation blade base 45a. On the outer surface of the curved portion 46af of the agitation blade mounting base 46a, four agitation blades Ba1 to Ba4 are disposed (arranged) obliquely from the inside to the outside with respect to the rotation direction M1, as shown in FIG. 5(B), for example. The agitation blade mounting seat 46a is disposed at an angle with respect to the unit agitation blade base 45a so that the four agitation blades Ba1 to Ba4 are disposed obliquely from the inside to the outside with respect to the rotation direction M1. An agitation-claw mounting base 46b is mounted on the unit agitation-blade base 45b. On the outer surface of a curved portion 46bf of the agitation-claw mounting base 46b, three agitation claws Bb1 to Bb3 are disposed (arranged) obliquely from the outside to the inside with respect to the rotation direction M1, as shown in FIG. 5(B), for example. The agitation-claw attachment base 46b is disposed at an angle with respect to the unit agitation blade body 45b so that the three agitation claws Bb1 to Bb3 are disposed obliquely from the outside toward the inside with respect to the rotation direction M1.

[0030] Next, the left stirring member 30b will be further described. The unit agitating blade body 41c includes a unit agitating blade base 45c and an agitating blade mounting base 46c on which three agitating blades Bc1 to Bc3 are arranged. The unit agitating blade body 41d includes a unit agitating blade base 45d and an agitating blade mounting base 46d on which four agitating blades Bd1 to Bd4 are arranged. The agitating blade mounting bases 46c and 46d have arc-shaped curved portions 46cf and 46df and reinforcing portions 46cs and 46ds. The reinforcing portions 46cs and 46ds reinforce the arc-shaped curved portions 46cf and 46df so that they do not become distorted. Here, the reinforcing portions 46cs and 46ds are arranged diagonally across the unit agitating blade bases 45c and 45d along the longitudinal direction of the arc-shaped curved square faces of the curved portions 46cf and 46df, but may be arranged parallel to the longitudinal direction of the square faces.

[0031] 5(C) and 5(B), a circular mounting member 42b is fitted to the right-side rotating shaft 31b. A unit agitating blade base 45c and a unit agitating blade base 45d are attached to the mounting member 42b.

[0032] An agitation-claw mounting base 46c is mounted on the unit agitation-blade base 45c. On the outer surface of the curved portion 46cf of the agitation-claw mounting base 46c, three agitation claws Bc1 to Bc3 are disposed (arranged) obliquely from the outside to the inside with respect to the rotation direction M1, as shown in FIG. 5(B). The agitation blade mounting base 46c is disposed at an angle with respect to the unit agitation blade base 45c so that the three agitation blades Bc1 to Bc3 are disposed obliquely from the outside toward the inside with respect to the rotation direction M1. An agitation-claw mounting base 46d is mounted on the unit agitation-blade base 45d. On the outer surface of a curved portion 46df of the agitation-claw mounting base 46d, four agitation claws Bd1 to Bd4 are disposed (arranged) obliquely from the inside to the outside with respect to the rotation direction M1, as shown in FIG. 5(B). The agitation blade mounting base 46d is disposed at an angle with respect to the unit agitation blade base 45d so that the four agitation blades Bd1 to Bd4 are disposed obliquely from the inside to the outside with respect to the rotation direction M1.

[0033] The configuration of the unit agitating blade bases 45a to 45c will be described in detail below, taking the unit agitating blade base 45a as an example. The configuration of the unit agitating blade bases 45b to 45d is the same as that of the unit agitating blade base 45a. Fig. 6 is an exploded perspective view of the unit agitating blade base 45a. Fig. 7 is a perspective view of the unit agitating blade base 45a. Fig. 8 is a perspective view showing a configuration in which the agitating blade mounting base 46a is mounted on the unit agitating blade base 45a, and Fig. 9 is a front view showing a configuration in which the agitating blade mounting base 46a is mounted on the unit agitating blade base 45a. Fig. 10 is a view of the C1-C2 cross section of Fig. 9, seen from the rotating shaft side. Fig. 11 is a perspective view showing the unit agitating blade base 45a mounted on the circular mounting member 42a.

[0034] As shown in Figs. 6 and 7, the unit agitating blade base 45a includes opposing unit agitating blade substrates 45a1 and 45a2, and side plates 45a3 and 45a4 covering the sides of the unit agitating blade substrates 45a1 and 45a2. 8 and 9, when the unit agitating blade base 45a rotates in the rotation direction M1, the four agitating blades Ba1 to Ba4 arranged on the curved portion 46af of the agitating blade mounting base 46a send out soil from the inside to the outside. The sent out soil hits the side plates 45a3 and 45a4 covering the sides of the unit agitating blade substrate 45a1 and the unit agitating blade substrate 45a2, and is prevented from entering between the unit agitating blade substrate 45a1 and the unit agitating blade substrate 45a2. The unit agitating blade base 45d has the same effect as the unit agitating blade base 45a, and the unit agitating blade base 45b and the unit agitating blade base 45c send out soil from the outside to the inside, but have the same effect as the unit agitating blade base 45a.

[0035] In the embodiment of the present invention, the agitator 30a has unit agitator blades 41a and 41b each having four agitator blades Ba1-Ba4 and three agitator blades Bb1-Bb3 arranged diagonally from the inside to the outside and from the outside to the inside. The agitator 30b has unit agitator blades 41b and 41c each having three agitator blades Bc1-Bc3 and four agitator blades Bd1-Bd4 arranged diagonally from the outside to the inside and from the inside to the outside. Therefore, when the agitators 30a and 30b rotate, the soil is agitated up and down, front and back, left and right, and is evenly agitated.

[0036] That is, in the embodiment of the present invention, as shown in Fig. 3, when the hydraulic motor 12 rotates, the rotation is transmitted from the drive shaft 13 of the hydraulic motor 12 to the intermediate shaft 20 via the endless chain 25. Then, when the intermediate shaft 20 rotates, the rotation is transmitted from the intermediate shaft 20 to the rotating shafts 31a and 31b of the agitators 30a and 30b via the endless chain 26. As a result, the agitators 30a and 30b rotate in the direction of the arrow M1, as shown in Fig. 12.

[0037] The agitating blade units 41b and 41c have agitating blades Bb1-Bb3 and Bc1-Bc3 arranged diagonally from the outside to the inside. Therefore, when the agitating blade units 41b and 41c rotate in the direction of arrow M1 as shown in Fig. 6, they agitate the soil sequentially, and as a result, a force is applied to the soil from the outside to the inside as shown in Fig. 13. Therefore, as the agitating bodies 30a and 30b rotate, the soil moves in a direction from the outside to the inside.

[0038] The agitating blade units 41a and 41d have agitating blades Ba1-Ba4 and Bd1-Bd4 arranged obliquely from the inside to the outside. Therefore, when the agitating blade units 41a and 41d rotate further 180 degrees in the direction of the arrow M1, they agitate the soil sequentially, and as a result, a force is applied to the soil from the inside to the outside, as shown in Figure 13. Therefore, as the agitating bodies 30a and 30b rotate, the soil moves in a direction from the inside to the outside.

[0039] As the agitators 30a and 30b rotate, they repeatedly move the soil from the outside to the inside and from the inside to the outside, as shown in Fig. 13. Therefore, as the agitators 30a and 30b rotate, the soil is moved alternately not only in the up-down direction but also in the direction from the outside to the inside and the direction from the inside to the outside, so that the soil is sufficiently agitated in the front-back and left-right directions. It is preferable that the agitators 30a and 30b on both sides each have two unit agitator blades arranged at an angular interval of 180 degrees from each other.

[0040] As described above, in the embodiment of the present invention, the agitating bodies 30a and 30b have unit agitating blade bodies 41b and 41c in which agitating blades Bb1-Bb3, Bc1-Bc3 are arranged diagonally from the outside to the inside, and unit agitating blade bodies 41a and 41d in which agitating blades Ba1-Ba4, Bd1-Bd4 are arranged diagonally from the inside to the outside. Therefore, the soil is agitated up and down, front and back, left and right, and evenly.

[0041] In addition, in the embodiment of the present invention, the rotation of the hydraulic motor 12 is transmitted to the rotating shafts 31a and 31b of the agitators 30a and 30b via the endless chains 25 and 26. By using such endless chains 25 and 26, sufficient torque can be obtained and the agitators 30a and 30b can be smoothly rotated.

[0042] In addition, in the embodiment of the present invention, the rotation of the hydraulic motor 12 is received by the intermediate shaft 20 via the endless chain 25, and is further transmitted from the intermediate shaft 20 to the rotating shafts 31a and 31b of the agitators 30a and 30b via the endless chain 26. Therefore, torque can be converted at the intermediate shaft so that optimal torque can be obtained at the positions of the agitators 30a and 30b.

[0043] The present invention is not limited to the above-described embodiment, and various modifications and applications are possible without departing from the spirit and scope of the present invention. [Industrial Applicability]

[0044] INDUSTRIAL APPLICABILITY The present invention can be utilized as a ground mixing device for strengthening soft ground, etc., by mixing and stirring soil with a solidifying material such as cement milk while excavating the ground. [Explanation of symbols]

[0045] 11 Upper support (first support) 12 Hydraulic motor 13 Drive shaft 14 Sprockets 16 Oil transport routes 20 Intermediate shaft 21 Sprocket 22 Sprocket 23 Lower support (second support) 25,26 Endless chain 30a~30d Agitator 30c Injection nozzle 32 sprocket 41a to 41d Unit agitating blade body 42a, 42b Mounting members 45a to 45d Unit agitator blade base 45a1, 45a2 Unit mixing blade base plate 45a3, 45a4 side panels 46a~46d Mixing jaw mounting base 46af~46df Curved section 46as~46ds Reinforcement section Ba1~Ba4, Bb1~Bb3, Bc1~Bc3, Bd1~Bd4 Stirring claws 100 Ground mixing device

Claims

1. A drive motor; a chain mechanism for transmitting rotation of the drive motor; A first stirring body and a second stirring body are attached to both sides of a rotating shaft that is rotated by the chain mechanism, The first agitating body is composed of a first unit agitating blade body and a second unit agitating blade body in which a plurality of agitating prongs are arranged, and the second agitating body is composed of a third unit agitating blade body and a fourth unit agitating blade body in which a plurality of agitating prongs are arranged, Each of the first to fourth unit agitating blade bodies has a unit agitating blade base attached to the rotating shaft, an agitating blade mounting base connected to the unit agitating blade base, and the plurality of agitating blades arranged along an outer surface of the agitating blade mounting base, The plurality of stirring claws are arranged at intervals in the direction of the rotation shaft on the stirring claw mounting base, Each of the unit agitating blade bases of the first to fourth unit agitating blade bodies has two opposing unit agitating blade substrates and two side plates extending from each agitating blade mounting base and covering both sides between the two unit agitating blade substrates. Ground mixing device.

2. The ground mixing device of claim 1, wherein the first unit agitating blade body and the second unit agitating blade body, and the third unit agitating blade body and the fourth unit agitating blade body are respectively arranged at angular intervals of 180 degrees from each other.

3. The agitation blade mounting base of the first unit agitation blade body is arranged at an angle with respect to the unit agitation blade base of the first unit agitation blade body so that the agitation blades are arranged obliquely from the inside to the outside with respect to the rotation direction of the rotation shaft, The agitation blade mounting base of the second unit agitation blade body is arranged at an angle with respect to the unit agitation blade base of the second unit agitation blade body so that the agitation blades are arranged obliquely from the outside to the inside with respect to the rotation direction of the rotation shaft, The agitation blade mounting base of the third unit agitation blade body is arranged at an angle with respect to the unit agitation blade base of the third unit agitation blade body so that the agitation blades are arranged obliquely from the outside to the inside with respect to the rotation direction of the rotation shaft, The ground mixing device described in claim 2, wherein the mixing claw mounting base of the fourth unit mixing blade body is arranged at an angle relative to the unit mixing blade base of the fourth unit mixing blade body so that the multiple mixing claws are arranged diagonally from the inside to the outside with respect to the rotation direction of the rotating shaft.

4. A ground mixing device as described in any one of claims 1 to 3, wherein the mixing claw mounting base has an arc-shaped curved portion connected to the unit mixing blade base, and a reinforcing portion arranged to sandwich the unit mixing blade base along the longitudinal direction of the surface of the curved portion.

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