JP2020165296A - Agitation blade and mechanical agitation method using the same - Google Patents

Abstract

To provide an agitation blade which materializes improvement of ground agitation efficiency, and a mechanical agitation method using the same.SOLUTION: An agitation blade 14 includes a rotation member 76 having a substantially cylindrical shape, and a plurality of agitation impeller vanes 15 fixed to an outer peripheral portion of the rotation member 76, at least a part of the agitation impeller vane 15 among the plurality of agitation impeller vanes 15 has a platy slanted portion 100 slanted relative to a rotation direction of the rotation member 76. Therefore, when the agitation impeller vanes 15 having the slanted portion 100 are rotationally moved by rotation of the rotation member 76, ground formation soil can be forcibly moved by two surfaces of the slanted portion 100 slanted relative to the rotation direction of the rotation member 76. Thereby, the ground formation soil in contact with the agitation impeller vanes 15 is moved in a rotation direction and an axial direction of the rotation member 76, and accordingly ground agitation efficiency can be improved.SELECTED DRAWING: Figure 3

Description

The present invention relates to a stirring blade that agitates the ground while rotating at the tip of a stirring device attached to a working machine of a heavy machine, and a mechanical stirring method using the stirring blade.

In the mechanical agitation method, which is one of the methods for improving the ground, the ground-forming soil and the improvement material are mixed and agitated by a rotating stirring blade to create an improved body in the ground. A plurality of stirring blades having a rod shape or a trapezoidal shape are fixed to the stirring blade (see, for example, Patent Document 1), and the stirring blades rotate and move in the ground as the stirring blade rotates, and the ground forming soil is formed. The inside of the ground is agitated by contacting with.

Japanese Unexamined Patent Publication No. 2003-184067

Here, in the conventional stirring blade in which the rod-shaped or trapezoidal stirring blade is fixed, the stirring blade does not perform the expected stirring, and the stirring efficiency is poor, to the extent that a groove is formed in the movement trajectory of the stirring blade. Further, cohesive soil may adhere between the adjacent stirring blades to cause rotation, which is also a factor of deteriorating the stirring efficiency. In addition, the tip of the stirring blade comes into contact with the unstirred ground, but a large load is applied at that time, so it is necessary to increase the strength of the stirring blade or generate a large rotational torque. ..
The present invention has been made in view of the above problems, and an object of the present invention is to improve the stirring efficiency of the ground.

(Aspect of the invention)
The following aspects of the invention exemplify the configurations of the present invention and will be described separately in order to facilitate understanding of the various configurations of the present invention. Each section does not limit the technical scope of the present invention, and some of the components of each section are replaced, deleted, or the like while taking into consideration the best mode for carrying out the invention. Those to which the above-mentioned components are added can also be included in the technical scope of the present invention.

(1) A stirring blade that stirs the ground while rotating at the tip of a stirring device attached to a working machine of a heavy machine, and a rotating member having a substantially cylindrical shape and a plurality of rotating members fixed to the outer peripheral portion of the rotating member. A stirring blade including a stirring blade, and at least a part of the plurality of stirring blades has a plate-shaped inclined portion inclined with respect to the rotation direction of the rotating member (claim 1).

The stirring blade described in this section includes a rotating member and a plurality of stirring blades, and the rotating member has a substantially cylindrical shape, and the central axis thereof is used as a rotation axis, for example, at a portion rotated by the power of a heavy machine or the like. is there. The plurality of stirring blades are fixed to the outer peripheral portion of the rotating member, and at least a part of the plurality of stirring blades has a plate-shaped inclined portion inclined with respect to the rotation direction of the rotating member. ing. Therefore, when the stirring blade having the inclined portion is rotationally moved by the rotation of the rotating member, the ground forming soil is forcibly moved by the two surfaces of the inclined portion inclined with respect to the rotation direction of the rotating member. As a result, the ground-forming soil that comes into contact with the stirring blade moves in the rotational direction and the axial direction of the rotating member, so that the stirring efficiency of the ground is improved.

(2) In the above item (1), the plurality of stirring blades form a plate shape orthogonal to the axial direction of the rotating member, and from the root portion to the rotating member in the axial view of the rotating member. The first stirring blade includes a first stirring blade having an outer blade portion extending outward about the rotation axis of the rotating member and then extending in an arc in a direction opposite to the rotation direction of the rotating member. The stirring blade of the above is a stirring blade (claimed) in which the inclined portion is formed by bending the end side opposite to the rotation direction of the rotating member in a direction deviating from the extending direction of the outer blade portion. 2).

In the stirring blade described in this section, a plurality of stirring blades include a first stirring blade, and the first stirring blade has a plate shape orthogonal to the axial direction of the rotating member. That is, in the first stirring blade, the thin outer peripheral portion connecting the outer edges of the two plate-shaped surfaces is directed in the rotational direction or the radial direction of the rotating member. Further, the first stirring blade has an outer blade portion in a part of the above-mentioned thin outer peripheral portion. This outer blade portion is a front view of one surface of the plate-shaped first stirring blade in the axial direction of the rotating member, in other words, from the base portion of the first stirring blade with respect to the rotating member. After extending outward around the rotation axis of, it extends in an arc in the direction opposite to the rotation direction of the rotating member.

With the above configuration, when the rotating member is rotated, the thin outer blade portion of each first stirring blade enters the ground, and the outer blade portion is arcuate in the direction opposite to the rotation direction of the rotating member. Since the first stirring blade has a streamlined shape, the load received from the ground is suppressed. As a result, the rotational torque required for the rotation of the rotating member is reduced, and even soft ground containing cohesive soil or the like can be smoothly rotated. Further, when the plate-shaped first stirring blade rotates and moves, the ground-forming soil is stirred while being in contact with the two surfaces of the first stirring blade extending in the direction opposite to the rotation direction of the rotating member. The contact time of one first stirring blade with the ground-forming soil is long, and the stirring efficiency is improved. In addition, since the cohesive soil and the like contained in the ground are easily peeled off and hard to adhere to the first stirring blade that rotates and moves in this way, the occurrence of rotation is suppressed, which also improves the stirring efficiency. is there.

In addition, the stirring blade described in this section has a first stirring blade provided with a bent portion. Specifically, the first stirring blade provided with the bent portion is a plan view overlooking the thin outer blade portion extending in the direction opposite to the rotation direction of the rotating member, and the end portion opposite to the rotating direction of the rotating member. The side is bent in a direction deviating from the extending direction of the outer blade portion, and the inclined portion is formed by this bent portion. That is, since such a first stirring blade has a plate shape bent in the middle portion extending in a streamlined manner, when it is rotationally moved by the rotation of the rotating member, the plate-shaped first stirring blade 2 The ground-forming soil in contact with the two surfaces is forcibly moved along the bending direction of the first stirring blade. As a result, the ground-forming soil in contact with the first stirring blade moves in the rotational direction and the axial direction of the rotating member, so that the stirring efficiency of the ground is further improved.

(3) In the above item (2), the first stirring blade is located at a position opposite to the rotation direction of the rotating member with respect to the root portion in the axial view of the rotating member, and the outer blade portion. A stirring blade (claim 3) in which a notch having a shape similar to that of the outer blade portion is provided at a position closer to the rotating member.
The stirring blade described in this section has a first stirring blade provided with a notch having a shape that resembles an outer blade portion. This notch is the axial view of the rotating member to which the first stirring blade is fixed, and is located at a position opposite to the rotating direction of the rotating member with respect to the base portion of the first stirring blade with respect to the rotating member, and the outer blade. It is provided at a position closer to the rotating member than the portion. As a result, the plate-shaped first stirring blade has a smaller area in front view while maintaining streamline, so that the resistance received from the ground is reduced and cohesive soil and the like are less likely to adhere. ..

(4) In the above items (2) and (3), the first stirring blade is provided with through holes penetrating from one plate-shaped surface to the other surface at a plurality of positions excluding the root portion. Stirring blade (claim 4).
The stirring blade described in this section is provided with through holes penetrating from one plate-shaped surface to the other surface at a plurality of locations of the first stirring blade except at least the base portion with respect to the rotating member. is there. As a result, cohesive soil and the like are less likely to adhere to both sides of the first stirring blade, and even if they adhere, they are easily peeled off.

(5) In the above items (1) to (4), the plurality of stirring blades have a plate shape extending radially outward from the outer peripheral portion of the rotating member, and have an arc-shaped outer blade at the tip portion thereof. A stirring blade (claim) including a second stirring blade, wherein the second stirring blade is fixed so as to be inclined with respect to the rotation direction of the rotating member, so that the entire stirring blade forms the inclined portion. 5).
The stirring blades described in this section include a second stirring blade in a plurality of stirring blades, and the second stirring blade has a plate shape extending radially outward from the outer peripheral portion of the rotating member and its tip. It has an arc-shaped outer blade in the part. For this reason, a part of the thin outer peripheral portion that connects the outer edges of the two plate-shaped surfaces forms an arc-shaped outer blade, and the outer blade is directed in the radial direction of the rotating member. .. Further, the second stirring blade is fixed so as to be inclined with respect to the rotation direction of the rotating member, so that the entire stirring blade forms an inclined portion.

With such a configuration, when the second stirring blade is rotationally moved by the rotation of the rotating member, the ground-forming soil in contact with the two surfaces of the plate-shaped second stirring blade is the second in the rotation direction of the rotating member. It is forcibly moved along the tilting direction of the stirring blade. As a result, the ground-forming soil in contact with the second stirring blade moves in the rotational direction and the axial direction of the rotating member, so that the stirring efficiency of the ground is further improved. Further, since the outer blade of the second stirring blade directed in the radial direction of the rotating member stirs the ground-forming soil while being cut down, the stirring efficiency of the ground is also improved.

(6) In the above item (5), the plurality of stirring blades include a plurality of the second stirring blades having different inclination directions and / or inclination angles with respect to the rotation direction of the rotating member (claim). 6).
In the stirring blades described in this section, a plurality of stirring blades include a plurality of second stirring blades, and the plurality of second stirring blades have tilt directions and / or tilt angles with respect to the rotation direction of the rotating member. It's different. That is, among the plurality of second stirring blades, at least one second stirring blade having a different inclination direction and / or inclination angle with respect to the rotation direction of the rotating member as compared with the other second stirring blades. include. As a result, the ground forming soil is forced in the direction corresponding to the inclination direction and the inclination angle of each of the second stirring blades by the plurality of second stirring blades having different inclination directions and / or inclination angles. Since the soil is moved to, the soil forming the ground is moved in various directions, and the stirring efficiency of the ground is further improved.

(7) In the above items (5) and (6), the second stirring blade is a stirring blade (claim 7) in which a cutting bit is attached to the outer blade.
In the stirring blade described in this section, since the cutting bit is attached to the outer blade of the second stirring blade, the ground forming soil can be efficiently cut down by the outer blade of the second stirring blade. , It also corresponds to the stirring of harder ground.

(8) In the above items (1) to (7), the plurality of stirring blades extend from the outer peripheral portion of the rotating member to the outside in the radial direction, and form a plate-like mounting portion orthogonal to the axial direction of the rotating member. A plate-shaped extending portion extending from the mounting portion along the circumferential direction of the rotating member at a position spaced outward in the radial direction from the outer peripheral portion of the rotating member in the axial view of the rotating member. In the third stirring blade, the extending portion extends in a direction deviating from the circumferential direction of the rotating member, so that the extending portion causes the inclined portion to be formed by the extending portion. The agitating blade formed (claim 8).

In the stirring blade described in this section, a plurality of stirring blades include a third stirring blade, and the third stirring blade has a mounting portion and an extending portion. The mounting portion extends radially outward from the outer peripheral portion of the rotating member and forms a plate shape orthogonal to the axial direction of the rotating member. For this reason, in the mounting portion, the thin outer peripheral portion connecting the outer edges of the two plate-shaped surfaces is directed in the rotational direction or the radial direction of the rotating member. A plate-shaped extending portion also extends from the outer peripheral portion of such a mounting portion. Specifically, this extending portion extends from the mounting portion along the circumferential direction of the rotating member at a position spaced radially outward from the outer peripheral portion of the rotating member in the axial view of the rotating member. .. For this reason, the extending portion is formed on a thin outer peripheral portion that connects the outer edges of the two plate-shaped surfaces, and is a circle of the rotating member at a position facing the outer peripheral portion of the rotating member in the axial view of the rotating member. An inner blade portion extending along the circumferential direction and an outer blade portion extending along the circumferential direction of the rotating member are formed at the end opposite to the inner blade portion, mainly directed outward in the radial direction of the rotating member. It is roughly shaped like a sickle.

Then, in the third stirring blade, such an extending portion extends in a direction deviating from the circumferential direction of the rotating member, so that an inclined portion is formed by the extending portion. That is, the third stirring blade rotates in a plan view overlooking the outer peripheral portion of the rotating member, in such a manner that the mounting portion is arranged along the rotation direction of the rotating member, but the extending portion bends from the mounting portion. It extends in a direction deviating from the circumferential direction of the member. With such a configuration, when the rotating member rotates and the third stirring blade rotates, the ground-forming soil in contact with each of the two surfaces of the plate-shaped mounting portion and the extending portion spreads on each surface. It is forcibly moved along the direction of presence. As a result, the ground-forming soil in contact with the third stirring blade moves in the rotational direction and the axial direction of the rotating member, so that the stirring efficiency of the ground is further improved.

(9) In the above item (8), the plurality of stirring blades include a plurality of the third stirring blades in which the extending directions of the extending portions are opposite to each other in the rotating direction of the rotating member. Wings (Claim 9).
In the stirring blades described in this section, a plurality of stirring blades include a plurality of third stirring blades, and in these plurality of third stirring blades, the extending direction of the extending portion is the rotation direction of the rotating member. It's the opposite. That is, in the plurality of third stirring blades, the extending portion extends in the same direction as the rotation direction of the rotating member in the axial direction of the rotating member, and the extending portion is A third stirring blade extending in the direction opposite to the rotation direction of the rotating member is included. Therefore, when the plurality of third stirring blades rotate and move, the ground-forming soil comes into contact with the two surfaces of the mounting portion and then contacts the two surfaces of the extending portion, or extends. It is moved in various movement patterns, such as a pattern in which it is moved in contact with two surfaces of the mounting portion after being in contact with the two surfaces of the portion. Therefore, the ground-forming soil is moved in various directions, and the stirring efficiency of the ground is further improved.

(10) In the above items (8) and (9), the third stirring blade has an inner blade portion of the extending portion having a width larger than the thickness of the inner blade portion of the inner blade portion. A stirring blade (claim 10) to which a plate portion extending along the inner blade portion is attached so as to project on both sides orthogonal to the extending direction.
The stirring blade described in this section has a plate portion extending along the inner blade portion attached to the inner blade portion of the extending portion of the third stirring blade as described in the above item (8). Is. That is, this plate portion has a width larger than the thickness of the inner blade portion and projects on both sides orthogonal to the extending direction of the inner blade portion, and one surface of the plate portion faces the outer peripheral portion of the rotating member. As described above, the vicinity of the center of the other surface in the width direction is connected to the inner blade portion. Therefore, in addition to the mounting portion and the extending portion, the ground forming soil is also moved by the plate portion, and the plate portion protrudes to both sides of the inner blade portion and mainly outwards in the radial direction of the rotating member. It has two surfaces, one that is directed and one that is directed toward the outer peripheral portion of the rotating member, that is oriented in a direction different from that of both the mounting portion and the extending portion. Therefore, the movement of the ground-forming soil that is scooped up by the plate portion is added, and the stirring efficiency of the ground is further improved.

(11) In the above (1) to (10), at least a part of the plurality of stirring blades is arranged at irregular intervals in the circumferential direction of the rotating member (claim 11). ).
In the stirring blades described in this section, at least some of the stirring blades among the plurality of stirring blades are arranged at unequal intervals in the circumferential direction of the rotating member, so that the stirring blades are arranged at unequal intervals. A gap having a size different from that of the other stirring blades is formed around the stirring blade. That is, the stirring blades arranged at unequal intervals have different sizes of gaps formed between the stirring blades and the adjacent stirring blades from the stirring blades arranged at equal intervals, and further, the stirring blades are arranged at unequal intervals. Even among the stirring blades arranged, the size of the peripheral gap is different for each stirring blade. Therefore, when the stirring blades rotate, the ground-forming soil passing through such gaps is moved in irregular directions through gaps of various sizes, which, combined with the stirring action due to the shapes of the plurality of stirring blades, The stirring efficiency of the ground is improved.

(12) In the above item (11), there are five stirring blades, and the stirring blades are fixed so as to be at least partially unequally spaced in the circumferential direction of the rotating member (claim 12).
The stirring blades described in this section have five stirring blades fixed to the outer peripheral portion of the rotating member, and these five stirring blades are at least partially unequally spaced in the circumferential direction of the rotating member. It is fixed to. According to this, for example, when five stirring blades are fixed at five of the six locations equidistant in the rotation direction of the rotating member on the outer peripheral portion of the rotating member, the stirring blades are not fixed1. A gap larger than the other gaps will be formed at the location. For this reason, such a large gap brings about a change in the movement route of the ground-forming soil, and the agitation efficiency of the ground is improved. Even when gaps smaller than other gaps are formed due to the non-equidistant arrangement of the stirring blades, it is expected that the movement route of the ground-forming soil will change and the stirring efficiency will increase.

(13) In the above items (1) to (12), a plurality of cutting blades fixed to the outer peripheral portion of the rotating member are included, and each of the plurality of cutting blades is a plate orthogonal to the axial direction of the rotating member. The size of the direction orthogonal to the outer peripheral portion of the rotating member in the axial direction of the rotating member is larger than that of each of the plurality of stirring blades and is parallel to the rotating direction of the rotating member. A stirring blade having a size smaller than that of each of the plurality of stirring blades (claim 13).
The stirring blade described in this section further includes a plurality of cutting blades fixed to the outer peripheral portion of the rotating member, whereby a plurality of stirring blades and a plurality of cutting blades are formed on the outer peripheral portion of the rotating member. It will be fixed. Each of the plurality of cutting blades has a plate shape orthogonal to the axial direction of the rotating member, and the size that can be confirmed in the axial direction of the rotating member is different from that of the stirring blade.

That is, each of the cutting blades has a larger size in the direction orthogonal to the outer peripheral portion of the rotating member than each of the stirring blades and a size in a direction parallel to the rotation direction of the rotating member. Is smaller than the stirring blade. Since the size of the cutting blade in the direction orthogonal to the outer peripheral portion of the rotating member is larger than that of the stirring blade, the cutting blade comes into contact with the ground-forming soil before the stirring blade when the rotating member rotates. Further, since the size of the cutting blade in the direction parallel to the rotation direction of the rotating member is smaller than that of the stirring blade, the energy for cutting the ground-forming soil can be transmitted more efficiently than the stirring blade. As a result, even a hard ground that is difficult to stir only with the stirring blades can be agitated without any problem because the cutting blades agitate the ground while cutting it.

(14) In the above item (13), the rotating member can detachably fix the stirring blade and the cutting blade at a plurality of positions spaced apart in the rotation direction and the axial direction along the outer peripheral portion thereof. A stirring blade having a fixed portion (claim 14).
The stirring blade described in this section has fixing portions provided at a plurality of positions spaced apart in the rotation direction and the axial direction along the outer peripheral portion of the rotating member, and attachment / detachment to each of these fixing portions is provided. The stirring blade and the cutting blade are fixed as possible. As a result, the plurality of stirring blades and a plurality of cutting blades of any type described above are fixed at arbitrary positions according to the properties of the ground to be constructed, so that the ground having various properties is efficiently stirred. Will be done. Further, since the number and position of the stirring blades and the cutting blades, the type and combination of the stirring blades, and the like are changed during the construction, the efficiency can be further improved according to the construction situation.

(15) A mechanical stirring method in which the ground is agitated by using a stirring blade that rotates at the tip of a stirring device attached to a working machine of a heavy machine, and is applied to the outer peripheral portion of a rotating member having a substantially cylindrical shape of the stirring blade. , A plurality of stirring blades and / or a plurality of cutting blades are detachably fixed at arbitrary positions spaced apart from each other, selectively according to the properties of the ground, and the rotating direction of the rotating member is used as the stirring blade. Using a stirring blade having a plate-shaped inclined portion inclined with respect to the above, the cutting blade forms a plate shape orthogonal to the axial direction of the rotating member, and the rotating member is viewed in the axial direction of the rotating member. A mechanical stirring method using a cutting blade whose size in the direction orthogonal to the outer peripheral portion is larger than that of the stirring blade and whose size in the direction parallel to the rotation direction of the rotating member is smaller than that of the stirring blade (claim 15). ).

By performing the mechanical stirring method described in this section using the stirring blade of the above item (14), at least the equivalent operation corresponding to the stirring blade of the above items (1), (13) and (14) is achieved. It plays. In particular, for example, when stirring relatively soft ground, only the stirring blades or more stirring blades than the cutting blades are fixed to the rotating member, and when stirring relatively hard ground, only the cutting blades or only the cutting blades are fixed to the rotating member. The configuration of the stirring blade is changed according to the properties of the ground, such as fixing more cutting blades than the stirring blade. Furthermore, since the fixing position of the stirring blade and the cutting blade is arbitrary, such as arranging the stirring blade and the cutting blade alternately, it is possible to use a stirring blade having an optimum configuration in consideration of the ground properties and construction conditions. , The stirring efficiency is optimized.

Since the present invention has the above-described configuration, it is possible to improve the stirring efficiency of the ground.

It is a front view of the stirring apparatus provided with a pair of stirring blades which concerns on 1st Embodiment of this invention. It is a side view of the stirring device of FIG. 1, (a) shows a state in which a rod part is not refracted, and (b) shows a state in which a rod part is refracted. It is an image side view which shows the mounting position of the 1st stirring blade and the cutting blade fixed to one stirring blade of FIG. The inner part in the direction, (b) shows the intermediate part in the axial direction of the stirring blade, and (c) shows the outer part in the axial direction of the stirring blade. It is an image side view which shows the mounting position of the 1st stirring blade and the cutting blade fixed to the other stirring blade of FIG. The inner part in the direction, (b) shows the intermediate part in the axial direction of the stirring blade, and (c) shows the outer part in the axial direction of the stirring blade. It is a three-view view of the first stirring blade, (a) is a plan view, (b) is a front view, and (c) is a side view. It is a perspective view of the 1st stirring blade. It is a three-view view of the cutting blade fixed to the stirring blade of FIG. 1, (a) is a plan view, (b) is a front view, and (c) is a side view. It is the schematic which shows an example of the piping which the position of a discharge port is different from FIG. It is a construction image figure by a hydraulic excavator equipped with a stirrer. It is a block diagram which shows schematic the hydraulic pressure control image of the hydraulic excavator provided with a stirrer. It is a perspective view which shows another example of the 1st stirring blade, (a) shows the thing which provided a plurality of through holes, and (b) shows the thing which the shape of the bent part is different from the example of FIG. It is a three-view view showing another example of a cutting blade, (a) is a plan view, (b) is a front view, and (c) is a side view. It is a side view which shows the hydraulic large-diameter drilling machine with a reader provided with a stirrer. The stirring blade according to the second embodiment of the present invention is shown, (a) is a front view in a state of being attached to a stirring device, and (b) is an arrangement in a state where the outer peripheral portion of a rotating member is developed in a plane. It is an image diagram. It is an image side view which shows the mounting position of the 2nd stirring blade and the cutting blade fixed to the stirring blade of FIG. 14, and (a) to (e) are the order with reference to the center position in the side direction of the stirring apparatus. Indicates from the inner part to the outer part in the axial direction of the stirring blade. It is a three-view view of the second stirring blade, (a) is a plan view, (b) is a front view, and (c) is a side view. Another example of the stirring blade according to the second embodiment of the present invention is shown in the arrangement image diagram corresponding to FIG. 14 (b), and the arrangement of the second stirring blade is between (a) and (d). It's different. The stirring blade according to the third embodiment of the present invention is shown, (a) is a front view in a state of being attached to a stirring device, and (b) is an arrangement in a state where the outer peripheral portion of a rotating member is developed in a plane. It is an image diagram. It is an image side view which shows the mounting position of the 3rd stirring blade and the cutting blade fixed to the stirring blade of FIG. 18, and FIG. A portion, (b) indicates an axial intermediate portion of the stirring blade, and (c) indicates an axially outer portion of the stirring blade. It is a three-view view of the third stirring blade, (a) is a plan view, (b) is a front view, and (c) is a side view.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. Here, detailed description of the same part or the corresponding part as in the prior art will be omitted, and the same part or the corresponding part will be indicated by the same reference numerals throughout the drawings.
1 and 2 schematically show the configuration of a stirring device 10 provided with a pair of stirring blades 14 according to the first embodiment of the present invention. As shown in the figure, the stirring device 10 includes a rod portion 12, a pair of stirring blades 14 (14A, 14B), a mounting portion 30, a pipe 32, an air pipe 33, a plurality of protruding parts 34, a refraction mechanism 40, and a shaft rotation mechanism 46. , Spiral tube 52, and extension mechanism 58. The rod portion 12 constitutes the main body portion of the stirring device 10, has a hollow substantially straight tubular shape, and various members are attached to the outside and the inside thereof.

The pair of stirring blades 14 are attached to the tips of the rod portions 12, and in the example of FIG. 1, one stirring blade 14A is located on the left side in the drawing and the other stirring blade 14B is located on the right side in the drawing. The rod portion 12 is attached in opposite directions with the tip portion 12a interposed therebetween. Each of the pair of stirring blades 14A and 14B includes a rotating member 76 having a substantially cylindrical shape, a plurality of stirring blades 15 fixed to the outer peripheral portion of the rotating member 76, and a plurality of cutting blades 17, which will be described later. It is designed to be rotated by the rotation drive unit 20. A plurality of first stirring blades 16 are fixed to the stirring blade 14 of the present embodiment as the plurality of stirring blades 15. Further, in the pair of stirring blades 14A and 14B, the tip portion 12a of the rod portion 12 so that the respective rotation axes 18 are orthogonal or substantially orthogonal to the extending direction of the rod portion 12 (vertical direction in FIGS. 1 and 2). It is attached to. In the example of FIG. 1, the angle α formed between each rotation shaft 18 and the extending direction of the rod portion 12 is smaller than 90 ° toward the tip end side (lower side in the figure) of the rod portion 12. It is in a slightly inclined state so as to be. For example, the angle α formed between the rotating shaft 18 and the extending direction of the rod portion 12 is not limited to this, but is about 5 ° smaller than 90 °.

A fixing portion 78 (see FIGS. 3 and 4) for fixing the stirring blade 15 (first stirring blade 16) and the cutting blade 17 to and detachably from the outer peripheral portion of each rotating member 76 of the stirring blades 14A and 14B ) Are provided at a plurality of positions spaced apart in the rotation direction and the axial direction of the rotating member 76. In this embodiment, fixing portions 78 are provided at a total of 18 locations, 3 rows spaced apart in the axial direction and 6 locations spaced apart in the rotation direction in each row. In a) to (c), the fixed portion 78 of each row is illustrated. FIG. 3 shows one of the pair of stirring blades 14A and 14B located on the left side in FIG. 1, and FIG. 4 shows the other stirring blade 14B located on the right side in FIG. The stirring blades 14A shown in FIGS. 3A to 3C have the same rotation phase, and the stirring blades 14B shown in FIGS. 4A to 4C also have the same rotation phase. Are the same.

As confirmed from FIG. 3A, two first stirring blades 16 and two cutting blades are located at four of the six fixing portions 78 on the axially inner portion of one stirring blade 14A. 17 and 17 are fixed. The two first stirring blades 16 are at positions 180 ° out of phase with each other, and the two cutting blades 17 are at positions 180 ° out of phase with each other. With reference to FIG. 3 (b), in the axially intermediate portion of the stirring blade 14A, two first fixing portions 78 having two fixing portions 78 having 180 ° out of phase with each other among the six fixing portions 78 The stirring blade 16 is fixed. Further, when FIG. 3C is confirmed, two first stirring blades 16 and one cutting blade are formed at three of the six fixing portions 78 on the axially outer portion of the stirring blade 14A. 17 and 17 are fixed, and the two first stirring blades 16 are positioned 180 ° out of phase with each other. Then, as can be confirmed in FIGS. 3 (a) to 3 (c), the first stirring blade 16 fixed with two in each of the three rows having different positions in the axial direction of the stirring blades 14A, for a total of six, is the first stirring blade 16. All are located 60 ° out of phase with each other. Further, one cutting blade 17 fixed to the axially outer portion of the stirring blade 14A is arranged at a position different in phase from the two cutting blades 17 fixed to the axially inner portion of the stirring blade 14A. ing. The stirring blade 14A in FIG. 3 is normally rotated clockwise on the rotating shaft 18.

One of the two first stirring blades 16 fixed to each of the three rows of the stirring blades 14A having different positions in the axial direction has a shape as shown in FIGS. 5 and 6. That is, the first stirring blade 16 has a plate shape having two surfaces 16a and 16b, and includes a base portion 80, an outer blade portion 82, a bending portion 84, a notch 86, and an insertion hole 88. There is. The base portion 80 is a portion fixed to a fixing portion 78 provided on the rotating member 76 of the stirring blade 14, and in the present embodiment provided on the base portion 80, the base portion 80 is bolted through three insertion holes 88. It is fixed by etc. The outer blade portion 82 is located between the two surfaces 16a and 16b, extends upward in the figure from the base portion 80 in a front view as shown in FIG. 5 (b), and then in the upper left direction in the figure. From to the lower left in the figure, it extends in a mountainous arc.

The bent portion 84 is located at the left end portion in FIG. 5 (b), and is a plan view overlooking the outer blade portion 82 as shown in FIG. 5 (a), and the extending direction of the outer blade portion 82 (left and right in the figure). It is a portion bent in a direction deviating from the direction), and in the illustrated example, it is bent in the upper left direction in the figure. When the first stirring blade 16 is fixed to the rotating member 76, the bent portion 84 is inclined with respect to the rotation direction of the rotating member 76, so that the bent portion 84 becomes a portion for forming the inclined portion 100. The notch 86 is a front view as shown in FIG. 5 (b), and the outer blade portion 82 is located at a position to the left of the base portion 80 in the figure and at a position lower than the outer blade portion 82 in the figure. It is provided in a shape that follows. With such a configuration, the overall shape of the first stirring blade 16 has a streamlined shape extending to the left in FIGS. 5A and 5B. The material for forming the stirring blade 15 (including the first stirring blade 16 and the second and third stirring blades 110 and 130 described later) can secure the strength required for each of the stirring blades 15. Any material can be used.

In the first stirring blade 16 described above, in a state of being fixed to the rotating member 76 as shown in FIG. 3, two plate-shaped surfaces 16a and 16b (see FIG. 5) excluding the bent portion 84 are rotating members. It is orthogonal to the axial direction of 76 (the direction orthogonal to the paper surface in FIG. 3), and the outer blade portion 82 is located outside the rotating member 76 about the rotating shaft 18. Further, the outer blade portion 82 extends from the base portion 80 to the outside centered on the rotation shaft 18 of the rotating member 76, and then extends in a direction opposite to the rotation direction of the rotating member 76 (counterclockwise direction in the drawing). ing. Further, the bent portion 84 is located on the end side of the first stirring blade 16 opposite to the rotation direction of the rotating member 76, and bends in a direction deviating from the rotating direction of the rotating member 76 to form the inclined portion 100. There is. FIG. 3 shows the locus of rotational movement of the outermost portion of the first stirring blade 16 when the stirring blade 14A rotates on the rotating shaft 18 by a virtual line indicated by reference numeral T. It can be seen from FIG. 3 that a part of the outer blade portion 82 of the first stirring blade 16 overlaps with the rotation locus T.

Here, referring to FIG. 1, of the six first stirring blades 16 shown on one stirring blade 14A, three first stirring blades located on the lower side in the example of FIG. 1 The blade 16 corresponds to the first stirring blade 16 shown in FIGS. 5 and 6. These three first stirring blades 16 in FIG. 1 are viewed from the rear side (left direction in FIG. 5B) when the direction in which the stirring blades 14A are rotated and moved when the stirring blades 14A are rotated is the front. (Corresponding to the direction shown in FIG. 1) is shown, and the bent portion 84 is bent to the right in FIG. In FIG. 1, for convenience of illustration, the shapes and arrangements of the first stirring blade 16 and the cutting blade 17 are shown in a simplified manner.

On the other hand, of the two first stirring blades 16 fixed to each of the three rows of the stirring blades 14A having different positions in the axial direction, the remaining other first stirring blade 16 is shown in FIGS. 5 and 6. In comparison with the first stirring blade 16 shown in the above, only the bending direction of the bent portion 84 is different, and the remaining portions have exactly the same structure. With reference to FIG. 1, of the six first stirring blades 16 shown on one stirring blade 14A, the three first stirring blades 16 located on the upper side in the state of FIG. 1 are , Corresponds to the first stirring blade 16 in which the bending direction of the bending portion 84 is different from that of the first stirring blade 16 shown in FIGS. 5 and 6. These three first stirring blades 16 are in a state of being viewed from the front side (corresponding to the direction of FIG. 5C) when the direction in which the stirring blades 14A are rotated and moved is the front. As shown, the bent portion 84 is bent to the left in FIG. That is, in the two first stirring blades 16 shown in each of FIGS. 3A to 3C, which are arranged at positions 180 ° out of phase with each other, the bending direction of the bending portion 84 is FIG. In the direction orthogonal to the paper surface in, they are opposite to each other.

On the other hand, each of the three cutting blades 17 shown in FIGS. 3 (a) and 3 (c) has a shape as shown in FIG. 7. That is, the cutting blade 17 has a plate shape having two surfaces 17a and 17b, and has a root portion 92, a bent portion 96, and an insertion hole 98. The base portion 92 is a portion fixed to a fixing portion 78 provided on the rotating member 76 of the stirring blade 14, and in the present embodiment provided on the base portion 92, the root portion 92 is bolted through three insertion holes 98. It is fixed by etc. The bent portion 96 is located on the left side in FIGS. 7 (a) and 7 (b), and deviates from the extending direction (left-right direction in the figure) from the root portion 92 in a plan view as shown in FIG. 7 (a). It is a portion bent in the direction, and in the illustrated example, it is bent in the lower left direction in the figure. Further, although not shown in FIG. 7, a cutting bit 94 is attached to the tip of the bent portion 96 of the cutting blade 17 as shown in FIGS. 3A and 3C. The cutting bit 94 is provided with a double-edged blade so that the stirring blade 14 can be rotated in either a clockwise direction or a counterclockwise direction. As the material for forming the cutting blade 17 and the cutting bit 94, any material that can secure the strength required for each can be adopted.

When the cutting blade 17 is fixed to the rotating member 76 as shown in FIG. 3, two plate-shaped surfaces 17a and 17b (see FIG. 7) excluding the bent portion 96 are in the axial direction of the rotating member 76 (see FIG. 7). It is fixed in a direction orthogonal to the paper surface in FIG. 3). Further, the bent portion 96 is located outside the rotating shaft 18 of the rotating member 76, and the tip of the bent portion 96 is closer to the rotation locus T of the stirring blade 15 (first stirring blade 16). It is located on the outside. That is, the size of the cutting blade 17 in the direction orthogonal to the outer peripheral portion of the rotating member 76 (radiation direction centered on the rotating shaft 18) is agitated in the axial direction of the rotating member 76 as shown in FIG. It is larger than the blade 15 (first stirring blade 16). Further, it can be confirmed that the size of the cutting blade 17 in the direction parallel to the rotation direction of the rotating member 76 is smaller than that of the stirring blade 15 (first stirring blade 16). Here, with reference to FIG. 1, of the three cutting blades 17 shown on one stirring blade 14A, the two cutting blades 17 located on the right side in the drawing (two of FIG. 3A). The bent portion 96 is fixed in the direction toward the right side in FIG. 1). On the other hand, in the one cutting blade 17 (corresponding to one cutting blade 17 in FIG. 3C) located on the left side of the stirring blade 14A in the drawing, the bent portion 96 is oriented toward the left side in FIG. It is fixed.

Next, when FIG. 4 is confirmed, the other stirring blade 14B is normally rotated counterclockwise on the rotation shaft 18. Two first stirring blades 16 and two cutting blades 17 are fixed to the axially inner portion of the stirring blade 14B shown in FIG. 4A, and the stirring blade 14B shown in FIG. 4B is Two first stirring blades 16 are fixed to the axially intermediate portion, and two first stirring blades 16 and one are fixed to the axially outer portion of the stirring blade 14B shown in FIG. 4 (c). The cutting blade 17 of the above is fixed. The first stirring blade 16 and the cutting blade 17 have a symmetrical positional relationship with the first stirring blade 16 and the cutting blade 17 fixed to the stirring blade 14A shown in FIG. Further, as can be confirmed in FIG. 1, the bent portion 84 of the first stirring blade 16 fixed to the stirring blade 14B and the bent portion 96 of the cutting blade 17 are the first stirring blade 16 fixed to the stirring blade 14A. It can be seen that the bent portion 84 and the bent portion 96 of the cutting blade 17 are bent in the symmetrical direction in FIG. Therefore, the detailed description of the first stirring blade 16 and the cutting blade 17 fixed to the stirring blade 14B is referred to by replacing the description of the first stirring blade 16 and the cutting blade 17 fixed to the stirring blade 14A. I want to.

Of the first stirring blades 16 and cutting blades 17 fixed to the pair of stirring blades 14A and 14B as described above, the cutting blades 17 fixed to the axially inner portion of the stirring blades 14A and the shafts of the stirring blades 14B. The cutting blades 17 fixed to the inner portion in the direction are bent in a direction approaching each other. Therefore, these cutting blades 17 are positioned so as to excavate and stir just below the center of the tip portion 12a of the rod portion 12 in the lateral direction (left-right direction in FIG. 1). Further, these cutting blades 17 do not interfere with the rod portion 12 when they are in the upper position in FIG. 1 due to the rotation of the stirring blade 14, and they stir differently when they are in the lower position in FIG. The cutting blades 17 provided on the blade 14 are provided at an appropriate bending angle and length so as not to interfere with each other.

Returning to FIGS. 1 and 2, the above-mentioned rotary drive unit 20 is separately provided for each pair of stirring blades 14 so as to be incorporated in the stirring blade 14 at the tip of the rod portion 12, and this embodiment. Then, it is composed of a first stirring blade hydraulic motor 20A that rotates the rotating member 76 of one stirring blade 14A and a second stirring blade hydraulic motor 20B that rotates the rotating member 76 of the other stirring blade 14B. There is. The hydraulic motor 20A for the first stirring blade and the hydraulic motor 20B for the second stirring blade utilize the power (hydraulic pressure in this embodiment) supplied from the heavy machine 64 (see FIG. 9) to form a pair of stirring blades 14A and 14B. Is rotated, and hydraulic pressure is supplied through the inside of the rod portion 12. Further, the hydraulic motor 20A for the first stirring blade and the hydraulic motor 20B for the second stirring blade are each provided with a rotation control mechanism 22, and the rotation control mechanism 22 provides the rotation direction and the number of rotations of each stirring blade 14. And the rotational torque etc. are controlled.

Further, in the examples of FIGS. 1 and 2, each of the rotation drive units 20 is provided with a rotation assist control unit 62. These rotation assist control units 62 rotate the rotation control mechanism 22 so as to rotate the pair of stirring blades 14 in the direction assisting the shaft rotation when the rod portion 12 is axially rotated by the shaft rotation mechanism 46 described later. It controls each of the above. The specific content of this control will be described later together with the shaft rotation mechanism 46. The rotation assist control unit 62 may be installed at any position as long as the rotation control mechanism 22 can be controlled. For example, the rotation assist control unit 62 may be installed inside the rod unit 12 or installed on the heavy machine 64. You may.
With the above-described configuration, the pair of stirring blades 14 are rotated by the hydraulic motors 20A and 20B (rotary drive unit 20) controlled by the rotation control mechanism 22 during the construction using the stirring device 10, and the stirring blades 14 are rotated. A plurality of stirring blades 15 (first stirring blade 16) that rotate and move along the outer circumference of the stirring blade 14 while cutting the ground G (see FIG. 9) by the plurality of cutting blades 17 that rotate and move along the outer circumference. ) Causes the ground G to be agitated. In addition, in FIG. 2, a plurality of first stirring blades 16 and cutting blades 17 that are rotating and moving are simply shown in a circular shape.

With reference to FIG. 1, the plurality of protrusions 34 rotate at different positions in each of the stirring blades 14 in a direction parallel to the rotation axis 18 of the stirring blades 14 when the pair of stirring blades 14 rotate. It is attached to the rod portion 12 so as to project toward between a plurality of stirring blades 15 (first stirring blades 16). In the example of FIG. 1, when first confirmed from one stirring blade 14A, the outer circumference of the stirring blade 14A protrudes toward each of the three first stirring blades 16 shown on the upper side of the drawing. Two protrusions 34 are fixed to the rod portion 12 via the support member 36. Similarly, when the other stirring blade 14B is confirmed, two protrusions are projected so as to project toward each of the three first stirring blades 16 shown on the upper side of the outer periphery of the stirring blade 14B. The portion 34 is fixed to the rod portion 12 via the support member 36. These protrusions 34 may be, for example, rod-shaped or plate-shaped, and the material thereof may be one having high rigidity or one that bends to some extent, for example, a steel wire or the like. Further, the plurality of projecting portions 34 are detachably attached to the support member 36 or to the rod portion 12 together with the support member 36, and are attached and detached as necessary. .. In FIG. 2, the plurality of projecting portions 34 and the support member 36 are not shown.

With reference to FIG. 2, the pipe 32 is for supplying an improvement material for ground improvement to the vicinity of the pair of stirring blades 14A and 14B, and in this embodiment, the front and rear outside the rod portion 12 It is attached to the rear side in the direction (right side in FIG. 2). Further, the pipe 32 is detachably attached to the rod portion 12 along a part of the rod portion 12. Although not shown in FIG. 2 for convenience, any method can be adopted as the method of attaching the pipe 32 as long as it can be attached to and detached from the rod portion 12. Further, in FIG. 2, only a part of the pipe 32 along the rod portion 12 up to one end (lower end in the drawing) serving as the discharge port 32a of the improved material is shown, and is actually shown. The other end of the pipe 32 extends to the supply source of the improved material installed in the heavy machine 64 or its vicinity.

Here, in the pipe 32, the position of the discharge port 32a for discharging the improved material can be adjusted. For example, in FIG. 8, the pipe 32 in a state where the position of the discharge port 32a is adjusted to a position different from that in FIG. Is illustrated. In FIG. 8, the stirring blade 14 is not shown, and the rod portion 12 is shown in a simplified manner. The length of the pipe 32 shown in FIG. 8 is extended along the tip portion 12a of the rod portion 12 with the portion that was the discharge port 32a in the example of FIG. 2 as the connecting portion 32b, and the discharge port 32a is the tip portion. It is located on the lower side in the figure of 12a. Further, a part of the pipe 32 is covered with, for example, a steel cover 38. The position of the pipe 32 is arbitrary as long as it is attached along a part of the rod portion 12, and the rod portion 12 is located on the side side (left side or right side in FIG. 1) or the front side (FIGS. 2 and 8). It may be attached to the left side). Further, in order to cope with the refraction of the rod portion 12 by the refraction mechanism 40 described later, a part of the pipe 32 may be formed of a flexible material.

Returning to FIG. 2, the air pipe 33 is for supplying air (air) in the vicinity of the pair of stirring blades 14A and 14B, and in the example of FIG. 2, parallel to the pipe 32 and outside the rod portion 12. It is attached to the right side in FIG. Similar to the pipe 32, the air pipe 33 is detachably attached to the rod portion 12 along a part of the rod portion 12, and the attachment method is such that the air pipe 33 can be attached to and detached from the rod portion 12. If so, any method can be adopted. Further, in FIG. 2, only a part of the air pipe 33 along the rod portion 12 up to one end (lower end in the drawing) serving as the air discharge port 33a is shown, and is actually shown. The other end of the air pipe 33 extends to the air supply source installed in the heavy equipment 64 or its vicinity. Further, in the air pipe 33, the position of the discharge port 33a can be adjusted in this respect as well as the pipe 32, and the position of the discharge port 33a is set according to the situation.

The position of the air pipe 33 as described above is arbitrary as long as it is attached along a part of the rod portion 12, and is on the side side (left side or right side in FIG. 1) or the front side (FIG. 2) of the rod portion 12. It may be attached to the left side). Further, in order to cope with the refraction of the rod portion 12 by the refraction mechanism 40 described later, a part of the air pipe 33 may be formed of a flexible material.
The stirring device 10 of the present embodiment has a configuration in which a pipe 32 for supplying the improved material and an air pipe 33 for supplying air are provided one by one, but the stirring device 10 is configured to include one of them. Alternatively, the configuration may include two pipes 32 or two air pipes 33. Further, the structure may be provided with a pipe for merging the improved material and the air and supplying the air at the same time, or two such pipes may be provided. Alternatively, the configuration may be such that a pipe that simultaneously supplies the improved material and air and one of the pipe 32 or the pipe 33 are provided at the same time.

Returning to FIGS. 1 and 2, the spiral tube 52 has a straight tubular shape in which a guide plate 54 is spirally provided on the outer circumference, and the lower tip in FIGS. 1 and 2 has a pair of stirring blades 14A. In this embodiment, the rod portion 12 is attached to the front side (left side in FIG. 2) along the rod portion 12 so as to reach the upper vicinity in the figure of 14B. Further, the spiral pipe 52 is adapted to rotate around the shaft by using the power supplied from the heavy machine 64 (hydraulic in this embodiment), and in this embodiment, the spiral pipe 52 holds the upper end side in the drawing. The shaft is rotated by the hydraulic spiral pipe shaft rotation motor 56 installed as described above. The method of axially rotating the spiral tube 52 and the method of attaching the spiral tube 52 to the rod portion 12 so as to be axially rotatable are not limited to this embodiment, and may be another method.

The refraction mechanism 40 uses the power supplied from the heavy machine 64 (hydraulic in this embodiment) to refract the rod portion 12 from the middle portion to the tip end. In this embodiment, as shown in FIG. 2A, the refraction mechanism 40 is above the rod refraction cylinder 42 installed inside the rod portion 12 and the middle portion of the rod portion 12 in the drawing. Includes a pin 44 that pin-connects the portion of and the portion below. In the state of FIG. 2A, the rod refraction cylinder 42 is extended and the rod portion 12 is straightened. On the other hand, in FIG. 2B, due to the degeneracy of the rod refraction cylinder 42, the rod portion 12 from the pin connection portion to the tip slightly rotates about the pin 44, and the rod portion 12 It shows a state of being refracted to the right side in the figure with respect to the extending direction (vertical direction in the figure). In FIG. 2B, the rod refraction cylinder 42 and the pin 44 are not shown for convenience. Further, the refraction mechanism 40 is not limited to the configuration including the rod refraction cylinder 42 and the pin 44, and may have another configuration.

The shaft rotation mechanism 46 uses the power supplied from the heavy machine 64 (hydraulic in this embodiment) to rotate a shaft parallel to the extending direction (vertical direction in the figure) of the rod portion 12 in the non-refractive state. As a result, the rod portion 12 is axially rotated in a counterclockwise direction and a clockwise direction, respectively. In this embodiment, as shown in FIG. 1, the shaft rotation mechanism 46 is a rod rotation first cylinder 48 and a rod rotation second cylinder arranged on both sides of the rod portion 12 in the lateral direction (left-right direction in the drawing). Includes 50 and. The rod rotation first cylinder 48 and the rod rotation second cylinder 50 combine the expansion and contraction movements of the rod portion 12 and the attachment portion 30 so as to rotate the rod portion 12 with respect to the attachment portion 30. It is connected to both.

1 and 2 show a reference state in which the rod portion 12 is not axially rotated, and from this state, a combination of expansion and contraction operations of the rod rotation first cylinder 48 and the rod rotation second cylinder 50 is performed. In this embodiment, the rod portion 12 is axially rotated by a maximum of 90 ° in each of the counterclockwise rotation and the clockwise rotation. The maximum rotation angle of the rod portion 12 by the shaft rotation mechanism 46 is not limited to 90 °, and may be larger or smaller than 90 °. Further, the shaft rotation mechanism 46 is not limited to the configuration including the rod rotation first cylinder 48 and the rod rotation second cylinder 50, and may have other configurations.

Here, a method of assisting the shaft rotation of the rod portion 12 by the rotation assisting control unit 62 will be described. As described above, the rotation assisting control unit 62 controls the rotation so that when the rod portion 12 is rotated by the shaft rotation mechanism 46, the pair of stirring blades 14 are rotated in the direction assisting the shaft rotation. It controls the mechanism 22. For example, when the rod portion 12 is axially rotated clockwise in a plan view by the shaft rotation mechanism 46, in the rotation assist control unit 62, one stirring blade 14A is rotated counterclockwise when viewed from the left side in FIG. 1 (as opposed to the normal state). Each of the rotation control mechanisms 22 is controlled so that the stirring blade 14B rotates in the opposite direction) and rotates counterclockwise (the same rotation direction as in the normal state) when viewed from the right side in FIG.

Further, when the rod portion 12 is axially rotated counterclockwise in a plan view by the shaft rotation mechanism 46, in the rotation assist control unit 62, one stirring blade 14A is clockwise when viewed from the left side in FIG. Each of the rotation control mechanisms 22 is controlled so that the stirring blade 14B rotates in the rotation direction) and rotates clockwise (opposite to the normal state) when viewed from the right side in FIG. In any of these cases, the pair of stirring blades 14A and 14B will be rotated in opposite directions when viewed from the same direction. It should be noted that the configuration may not include such a rotation assisting control unit 62. In this case, the operator room 68 of the heavy machine 64 (see FIG. 9) when the rod unit 12 is rotated by the shaft rotation mechanism 46. Each of the rotation control mechanisms 22 may be controlled so as to rotate the pair of stirring blades 14A and 14B in the above-mentioned directions that assist the axial rotation of the rod portion 12 by the operation from.

The extension mechanism 58 extends the length of the rod portion 12 by utilizing the power supplied from the heavy machine 64 (hydraulic in this embodiment), and in this embodiment, the front side of the attachment portion 30 (FIG. The rod extension cylinder 60 arranged on the left side in 2) is included. The rod extension cylinder 60 is connected to both the rod portion 12 and the attachment portion 30 so as to extend the length of the rod portion 12 from the attachment portion 30 to the tip by its degenerate operation. 1 and 2 show a standard state in which the rod extension cylinder 60 is extended and the rod portion 12 is not extended. When the rod extension cylinder 60 is degenerated from this state, the length of the rod extension cylinder 60 is reduced. The rod portion 12 is extended by the amount. The configuration of the extension mechanism 58 is not limited to the configuration of this embodiment, and may be another configuration.

On the other hand, the mounting portion 30 is for mounting the rod portion 12 having the above configuration to the working machine 66 of the hydraulic excavator 64A as the heavy machine 64, for example, as shown in FIG. More specifically, in the mounting portion 30, the tip of the rod portion 12 faces downward in front of the hydraulic excavator 64A (left side in the drawing), and the pair of stirring blades 14A and 14B are on the left side in the lateral direction of the hydraulic excavator 64A and The rod portion 12 is attached to the work machine 66 so as to be located on the right side (the back side and the front side in the direction orthogonal to the paper surface). Further, the mounting portion 30 supports the rod portion 12 so as to be rotatable by the shaft rotating mechanism 46 and stretchable by the extending mechanism 58, with reference to FIGS. 1 and 2.

With reference to FIGS. 1, 2 and 9, the stirring device 10 having the above-described configuration operates as follows while being attached to the hydraulic excavator 64A as shown in FIG. That is, the ground G is excavated by the pair of stirring blades 14A and 14B rotated by the rotary drive unit 20, the improved material supplied from the pipe 32, the air supplied from the air pipe 33, and the ground G. The forming soil is mixed and stirred. At this time, the positions of excavation and stirring by the pair of stirring blades 14A and 14B are controlled by the operation of the working machine 66 of the hydraulic excavator 64A, and the rotation direction, rotation speed, rotation torque and the like of the pair of stirring blades 14A and 14B are controlled. , Controlled by the rotation control mechanism 22. Further, along with the supply of the improved material from the pipe 32, the spiral pipe 52 is rotated by the spiral pipe shaft rotation motor 56 in the direction in which the guide plate 54 provided on the outer periphery of the spiral pipe 52 rotates upward in the drawing. Will be done.

Further, if necessary, the refraction mechanism 40 refracts the rod portion 12 toward the hydraulic excavator 64A, the shaft rotation mechanism 46 rotates the rod portion 12, and / or the extension mechanism 58 extends the rod portion 12. Be told. At this time, the refraction angle of the rod portion 12, the axial rotation angle of the rod portion 12, and the extension length of the rod portion 12 are set to arbitrary angles or lengths up to their respective maximum amounts. For reference, in FIG. 9, the region where the ground G is excavated and agitated without extending the rod portion 12 is a region where the ground G is excavated and agitated with the rod portion 12 extended by the extension mechanism 58 by fine hatching. Are illustrated with rough hatching. In addition, as the improving material used at the time of construction, an appropriate improving material according to the construction conditions is selected from a slurry such as a cement slurry, a powder such as cement, and a corrosive material. Further, from a plurality of pipes 32 having various materials and pipe diameters, a pipe 32 formed of a material suitable for supplying the selected improved material and having a pipe diameter suitable for the construction conditions is selected. It is used by being attached to the rod portion 12.

Here, the hydraulic motor 20A for the first stirring blade and the hydraulic motor 20B for the second stirring blade constituting the rotation drive unit 20, the rod refracting cylinder 42 constituting the refracting mechanism 40, and the rod rotation constituting the shaft rotation mechanism 46 are used. As described above, the first cylinder 48, the second rod rotation cylinder 50, the rod extension cylinder 60 constituting the extension mechanism 58, and the spiral pipe shaft rotation motor 56 are all supplied from the heavy machine 64. It is driven by hydraulic pressure. FIG. 10 schematically shows a hydraulic control image of a hydraulic excavator 64A as a heavy machine 64 including a stirring device 10. As shown in the figure, the hydraulic excavator 64A has a hydraulic switching control unit 72, and the hydraulic switching control unit 72 controls the supply destination and the supply amount of the hydraulic pressure.

The hydraulic pressure is supplied to the above-mentioned hydraulic motor 20A for the first stirring blade, the hydraulic motor 20B for the second stirring blade, the rod refraction cylinder 42, the rod rotation first cylinder 48, the rod rotation second cylinder 50, and the rod. In addition to the extension cylinder 60 and the spiral pipe shaft rotation motor 56, a hydraulic excavator drive system 74 is included. The hydraulic excavator drive system 74 indicates a drive portion originally provided in the heavy machine 64, and includes each hydraulic actuator for performing the operation of the work machine 66, the rotation of the crawler, the turning operation, and the like. The hydraulic switching control unit 72 is controlled by receiving an operation from the operator room 68 (see FIG. 9) of the heavy machine 64, includes the operation of each drive portion included in the hydraulic excavator drive system 74, and extends the rod unit 12 and the shaft. All operations of rotation, refraction, rotation of the pair of stirring blades 14, and shaft rotation of the spiral tube 52 will be performed from the operator room 68.

The stirring blade 14 according to the first embodiment of the present invention provided in the stirring device 10 having the above-described configuration is not limited to the configurations shown in FIGS. 1, 3 and 4. .. For example, the quantity and mounting position of the first stirring blade 16 and the cutting blade 17 may be different from the illustrated example, and any quantity and mounting position can be adopted. In accordance with this, the position and quantity of the fixing portions 78 provided on the outer peripheral portion of the rotating member 76 may be adjusted. Further, the shapes of the first stirring blade 16 and the cutting blade 17 are not limited to the examples of FIGS. 5 to 7. The first stirring blade 16 may not be provided with, for example, a notch 86 as long as it has a plate-like shape having an outer blade portion 82 extending in an arc.

Further, the first stirring blade 16 may have a shape as shown in FIG. 11, for example. The first stirring blade 16 shown in FIG. 11A is provided with through holes 90 penetrating from one plate-shaped surface 16a to the other surface 16b at a plurality of positions excluding the base portion 80. As described above, the plate-shaped surfaces 16a and 16b may be processed with holes, dents, protrusions and the like. Further, in the first stirring blade 16 shown in FIG. 11B, the shape of the bent portion 84 located at the end of the streamline is elongated so that the shape as a whole thereof becomes closer to the streamline. , Its tip is sharp. On the other hand, the size of the cutting blade 17 in the direction orthogonal to the outer peripheral portion of the rotating member 76 is larger than that of the stirring blade 15, and the size of the cutting blade 17 in the direction parallel to the rotating direction of the rotating member 76 is smaller than that of the stirring blade 15. As long as it is plate-shaped, for example, it may be plate-shaped without a bent portion 96 as shown in FIG.

Further, the stirring device 10 provided with the stirring blade 14 according to the first embodiment of the present invention is not limited to the attachment of the hydraulic excavator 64A to the working machine 66, and the working machine 66 of another heavy machine 64. It may be attached to. For example, FIG. 13 illustrates a stirring device 10'attached to a working machine 66 of a hydraulic large-diameter drilling machine 64B with a leader as a heavy machine 64. The stirring device 10'is attached so as to move in the vertical direction along the leader 70 of the working machine 66 of the hydraulic large-diameter drilling machine 64B with a leader. Further, although detailed description will be omitted, in the stirring device 10', the positions of the pair of stirring blades 14 whose rotation is individually controlled and the detachable and discharge port 32a are adjusted in the same manner as the stirring device 10 attached to the hydraulic excavator 64A. Possible piping 32, removable and adjustable discharge port 33a air piping 33, a plurality of protruding portions 34, a bending mechanism 40 for bending the rod portion 12, and shaft rotation for axially rotating the rod portion 12. It includes a mechanism 46, a spiral pipe 52 that can rotate around the axis, and the like. The rod portion 12 preferably has a length corresponding to the maximum depth of the construction range.

By the way, according to the first embodiment of the present invention having the above configuration, it is possible to obtain the following effects. That is, the stirring blade 14 according to the first embodiment of the present invention is attached to the working machine 66 of the heavy machine 64 as shown in FIGS. 9 and 13, and the stirring device 10 as shown in FIGS. 1 and 2 is attached. It stirs the ground G while rotating at the tip, and includes a rotating member 76 and a plurality of stirring blades 15. The rotating member 76 has a substantially cylindrical shape, and is a portion that is rotated by, for example, the power of a heavy machine 64, with the central axis thereof as the rotating shaft 18. As shown in FIGS. 1 to 4, the plurality of stirring blades 15 are fixed to the outer peripheral portion of the rotating member 76, and at least a part of the plurality of stirring blades 15 is the rotating member 76. It has a plate-shaped inclined portion 100 inclined with respect to the rotation direction. Therefore, when the stirring blade 15 having the inclined portion 100 is rotationally moved by the rotation of the rotating member 76, the ground forming soil is forcibly moved by the two surfaces of the inclined portion 100 inclined with respect to the rotation direction of the rotating member 76. Can be made to. As a result, the ground-forming soil in contact with the stirring blade 15 moves in the rotational direction and the axial direction of the rotating member 76, so that the stirring efficiency of the ground G can be improved.

Further, in the stirring blade 14 according to the first embodiment of the present invention, a plurality of stirring blades 15 include a first stirring blade 16, and the first stirring blade 16 is shown in FIGS. 3 to 6 and FIGS. As shown in 11, each has a plate shape orthogonal to the axial direction of the rotating member 76. That is, in each of the first stirring blades 16, the thin outer peripheral portion connecting the outer edges of the two plate-shaped surfaces 16a and 16b is directed in the rotational direction and the radial direction of the rotating member 76. Further, each of the first stirring blades 16 has an outer blade portion 82 as a part of the above-mentioned thin outer peripheral portion. The outer blade portion 82 is viewed from the axial direction of the rotating member 76 as shown in FIGS. 3 and 4, in other words, from the front view of one surface of the plate-shaped first stirring blade 16 (for example, FIG. 5 (b). ) From the base portion 80 of the first stirring blade 16 with respect to the rotating member 76 to the outside centered on the rotating shaft 18 of the rotating member 76, and then the rotating member 76. It extends in an arc in the direction opposite to the rotation direction (counterclockwise direction in FIG. 3 and clockwise direction in FIG. 4).

With the above configuration, when the rotating member 76 is rotated, the thin outer blade portion 82 of each of the first stirring blades 16 enters the ground G, and the outer blade portion 82 is in the rotation direction of the rotating member 76. Since the first stirring blade 16 has a streamlined shape by extending in an arc shape in the opposite direction, the load received from the ground G can be suppressed. As a result, the rotational torque required for the rotation of the rotating member 76 can be reduced, and even the soft ground G containing cohesive soil or the like can be smoothly rotated. Further, when the plate-shaped first stirring blade 16 rotates and moves, the ground forming soil comes into contact with the two surfaces 16a and 16b of the first stirring blade 16 extending in the direction opposite to the rotation direction of the rotating member 76. Since it is agitated while being agitated, the contact time of one first agitating blade 16 with the ground-forming soil can be lengthened, and the agitation efficiency can be improved. In addition, since the cohesive soil and the like contained in the ground G are easily peeled off and hard to adhere to the first stirring blade 16 that rotates and moves in this way, the occurrence of rotation is suppressed, which also improves the stirring efficiency. Can be done.

Moreover, the stirring blade 14 according to the first embodiment of the present invention is provided with a bent portion 84 on the first stirring blade 16 as can be confirmed in FIGS. 1, 5, 6 and 11. Is. Specifically, the first stirring blade 16 provided with the bent portion 84 has a thin outer blade portion 82 extending in a direction opposite to the rotation direction of the rotating member 76, as shown in FIG. 5A, for example. In a plan view looking down, the end side (left side in the figure) opposite to the rotation direction of the rotating member 76 is bent in the direction deviating from the extending direction (left and right direction in the figure) of the outer blade portion 82, or in the upper left direction in the illustrated example. The inclined portion 100 is formed by the bent portion 84. That is, since such a first stirring blade 16 has a plate shape bent in the middle portion extending in a streamlined manner, when it is rotationally moved by the rotation of the rotating member 76, the plate-shaped first stirring blade 16 is formed. The ground-forming soil in contact with the two surfaces 16a and 16b of 16 can be forcibly moved along the bending direction of the first stirring blade 16. As a result, the ground-forming soil in contact with the first stirring blade 16 moves in the rotation direction and the axial direction of the rotating member 76, so that the stirring efficiency of the ground G can be further improved.

Further, as shown in FIG. 1, the first stirring blade 16 in which the bent portion 84 is bent to the left in the drawing and the bent portion 84 are attached to the plurality of first stirring blades 16 fixed to the rotating member 76. By including the first stirring blade 16 bent to the right in the figure, the stirring efficiency of the ground G can be further improved. Even if the stirring blade 14 is rotated in the reverse rotation direction opposite to the normal forward rotation direction, the ground-forming soil moved by the bent portion 84 of the first stirring blade 16 rotates as compared with the normal rotation. The member 76 is moved in the opposite direction with respect to the axial direction, and the stirring can be performed without any problem.

Further, as shown in FIGS. 5, 6 and 11, the stirring blade 14 according to the first embodiment of the present invention has a notch in the first stirring blade 16 having a shape similar to the outer blade portion 82. 86 is provided. The notch 86 is the axial view of the rotating member 76 to which the first stirring blade 16 is fixed (see FIGS. 3, 4 and 5 (b)), and the first stirring blade 16 with respect to the rotating member 76. The position of the rotating member 76 opposite to the rotation direction of the base portion 80 (leftward in FIG. 5B) and the position of the rotating member 76 side (lower side in FIG. 5B) of the outer blade portion 82. It is provided in. As a result, the plate-shaped first stirring blade 16 has a smaller area in front view while maintaining streamline, so that the resistance received from the ground G can be reduced and cohesive soil or the like is less likely to adhere. can do.
Further, as shown in FIG. 11A, the stirring blades 14 according to the first embodiment of the present invention are located at a plurality of locations except for the root portion 80 of the first stirring blade 16 with respect to at least the rotating member 76. A through hole 90 may be provided that penetrates from one plate-shaped surface 16a to the other surface 16b. As a result, cohesive soil and the like are more difficult to adhere to both surfaces 16a and 16b of the first stirring blade 16, and even if they adhere, they can be easily peeled off.

Further, as shown in FIGS. 1 to 4, the stirring blade 14 according to the first embodiment of the present invention further includes a plurality of cutting blades 17 fixed to the outer peripheral portion of the rotating member 76. As a result, the plurality of stirring blades 15 and the plurality of cutting blades 17 are fixed to the outer peripheral portion of the rotating member 76. As shown in FIGS. 3, 4, 7, and 12, each of the plurality of cutting blades 17 has a plate shape orthogonal to the axial direction of the rotating member 76, and is viewed in the axial direction of the rotating member 76. The size that can be confirmed is different from that of the stirring blade 15. That is, as can be confirmed in FIGS. 3 and 4, each of the cutting blades 17 is in a direction orthogonal to the outer peripheral portion of the rotating member 76 (radiation direction centered on the rotation axis 18) as compared with each of the stirring blades 15. ) Is larger than the stirring blade 15, and the size in the direction parallel to the rotation direction of the rotating member 76 is smaller than that of the stirring blade 15.

As described above, the cutting blade 17 has a size larger than that of the stirring blade 15 in the direction orthogonal to the outer peripheral portion of the rotating member 76, so that when the rotating member 76 rotates, the cutting blade 17 becomes ground-forming soil before the stirring blade 15. Can be contacted. Further, since the size of the cutting blade 17 in the direction parallel to the rotation direction of the rotating member 76 is smaller than that of the stirring blade 15, energy for cutting the ground-forming soil can be transmitted more efficiently than the stirring blade 15. Can be done. As a result, even if the ground G is hard and difficult to be agitated only by the stirring blade 15, it can be agitated while being cut by the cutting blade 17, so that it can be agitated without any problem.

Further, as shown in FIGS. 3 and 4, the stirring blade 14 according to the first embodiment of the present invention has a plurality of positions spaced apart in the rotational direction and the axial direction along the outer peripheral portion of the rotating member 76. The fixing portion 78 is provided in the above, and the stirring blade 15 and the cutting blade 17 are detachably fixed to each of the fixing portions 78. As a result, a plurality of stirring blades 15 and a plurality of cutting blades 17 of any type can be fixed at arbitrary positions according to the properties of the ground G to be constructed, so that the ground G having various properties can be efficiently fixed. Can be agitated. Further, since the quantity and position of the stirring blades 15 and the cutting blades 17, the type and combination of the stirring blades 15 can be changed during the construction, it is possible to further improve the efficiency according to the construction situation. ..

Next, the stirring blade 14'according to the second embodiment of the present invention will be described with reference to FIGS. 14 to 17. In FIGS. 14 to 17, the same parts as or corresponding to the stirring blade 14 according to the second embodiment of the present invention are designated by the same reference numerals. It should be noted that the stirring blade 14'according to the second embodiment of the present invention will be described only in the difference from the stirring blade 14 according to the first embodiment of the present invention. The description of the configuration of the same portion as that of the stirring blade 14 according to the embodiment will be omitted.

In the stirring blade 14'according to the second embodiment of the present invention, a plurality of second stirring blades 110 are fixed as a plurality of stirring blades 15 on the outer peripheral portion of the rotating member 76. Similar to the stirring blade 14, a pair of stirring blades 14'are attached to the tip of the rod portion 12 of the stirring device 10, and the pair of stirring blades 14' are opposed to each other with the tip portion 12a of the rod portion 12 interposed therebetween. It is attached. Further, in the pair of stirring blades 14', the angle α formed between each rotation shaft 18 and the extending direction of the rod portion 12 is 90 toward the tip end side (lower side in the drawing) of the rod portion 12. It is slightly tilted so that it is less than °. Then, FIG. 14A shows one of such a pair of stirring blades 14'in the direction in which the rotation axis 18 is horizontally arranged. Further, each of the pair of stirring blades 14'incorporates a rotation driving unit 20 including a rotation control mechanism 22 and a rotation assisting control unit 62, and is rotated by the rotation driving unit 20. It has become like.

Further, in FIG. 14B, the outer peripheral portion of the rotating member 76 of one of the stirring blades 14'is developed in a pseudo-planar shape, and the second stirring blade 110 is fixed to the outer peripheral portion of the rotating member 76. And the arrangement of the cutting blades 17 are shown. That is, in the rotating member 76 shown in FIG. 14 (b), the upper and lower ends in FIG. 14 (b) are originally connected to form a cylindrical shape, and the rotating member 76 is formed in a cylindrical shape in the left-right direction of FIG. 14 (b). Corresponds to the left-right direction of FIG. 14 (a). As can be confirmed in FIG. 14B, five second stirring blades 110 and two cutting blades 17 are attached to the stirring blade 14', and the details will be described later. Each of the second stirring blades 110 is tilted and fixed with respect to the rotation direction (vertical direction in FIG. 14B) of the rotating member 76. In addition, in FIG. 14A, imagining that the five second stirring blades 110 and the two cutting blades 17 rotate and move due to the rotation of the rotating member 76, the second stirring blade 110 and the cutting are performed. The blades 17 are illustrated by solid lines and virtual lines.

On the outer peripheral portion of the rotating member 76 of the stirring blade 14', a fixing portion 78 (see FIG. 15) for fixing the second stirring blade 110 and the cutting blade 17 detachably is provided on the rotation direction and shaft of the rotating member 76. It is provided at a plurality of positions spaced apart from each other in the direction. 15 (a) to 15 (e) show the image side surface of the stirring blade 14'shown in FIG. 14 from the axially inner side of the stirring blade 14'close to the lateral center position of the stirring device 10 to the axially outer side. It is shown in order. The stirring blades 14'shown in FIGS. 15 (a) to 15 (e) have the same rotation phase, and in FIGS. 15 (b) and 15 (d), the fixing portion 78 is not shown. are doing.

As confirmed from FIG. 15A, one second stirring blade 110 and one cutting blade 17 are fixed to the axially inner portion of the stirring blade 14'. These second stirring blades 110 and cutting blades 17 are located at positions 180 ° out of phase with each other, and correspond to the top second stirring blade 110 and the cutting blade 17 on the left side in FIG. 14 (b). It is a thing. With reference to FIG. 15B, one second stirring blade 110 is fixed to the portion between the axially inner portion and the intermediate portion of the stirring blade 14', which is shown in FIG. 14 (b). It corresponds to the second stirring blade 110 from the bottom in b). Confirming FIG. 15 (c), one second stirring blade 110 is fixed to the axially intermediate portion of the stirring blade 14', which is the second from the top in FIG. 14 (b). It corresponds to the second stirring blade 110.

Further, confirming FIG. 15 (d), one second stirring blade 110 is fixed to the portion between the axially intermediate portion and the outer portion of the stirring blade 14', which is shown in FIG. It corresponds to the lowermost second stirring blade 110 in 14 (b). Further, when FIG. 15 (e) is confirmed, one second stirring blade 110 and one cutting blade 17 are fixed to the axially outer portion of the stirring blade 14'. These second stirring blades 110 and cutting blades 17 correspond to the third stirring blade 110 from the top and the cutting blades 17 on the right side in FIG. 14B, and the cutting blades 17 correspond to the cutting blades 17 on the right side. The cutting blades 17 in FIG. 15A and the cutting blades 17 are at positions 180 ° out of phase with each other.

Further, the second stirring blade 110 shown one by one in FIGS. 15 (e), (c), (a), (d), and (b) has a phase of 60 ° in the clockwise direction in this description order. They have different positional relationships. Among them, the second stirring blade 110 of FIG. 15 (e) and the second stirring blade 110 of FIG. 15 (b) are at positions that are 120 ° out of phase with each other, but the second stirring blade 110 is located between them. The stirring blade 110 is not attached. That is, the five second stirring blades 110 are fixed at five of the positions where the outer peripheral portion of the rotating member 76 is divided into six equal parts along the rotation direction, and the second stirring blades 110 are adjacent to each other in the rotation direction. The distance between the stirring blades 110 is partially unequal. In FIG. 14B, such a position divided into six equal parts is shown by a two-dot chain line. The stirring blade 14'in FIG. 15 is normally rotated clockwise on the rotating shaft 18.

Each of the five second stirring blades 110 fixed to the stirring blade 14'has a shape as shown in FIG. That is, the second stirring blade 110 has a plate shape having two surfaces 110a and 110b, and the right portion in FIGS. 16A and 16B is a rotating member via the fixing portion 78. It is attached to the outer periphery of 76. Further, an arc-shaped outer blade 112 is provided on the side opposite to the portion attached to the outer peripheral portion of the rotating member 76, and the outer blade 112 is directed outward in the radial direction of the rotating member 76. The second stirring blade 110 having such a shape is fixed at an angle with respect to the rotation direction of the rotating member 76, as can be confirmed in FIG. 14 (b), so that the entire second stirring blade 110 is inclined and fixed. It forms 100. Therefore, in FIG. 16, for convenience, the second stirring blade 110 in a slightly tilted state is shown, and the illustration of the insertion hole or the like for fixing to the fixing portion 78 by bolting or the like is omitted. There is.

With reference to FIG. 14 (b), of the five second stirring blades 110, one second stirring blade 110 shown third from the top (second in FIG. 15 (e)). The stirring blade 110 (corresponding to the stirring blade 110) is fixed at an angle of about 15 ° clockwise with respect to the rotation direction (vertical direction in the drawing) of the rotating member 76. Further, each of the remaining four second stirring blades 110 (corresponding to the second stirring blades 110 in FIGS. 15A to 15D) is in a counterclockwise direction with respect to the rotation direction of the rotating member 76. It is fixed at an angle of about 15 °. That is, the one second stirring blade 110 and the four second stirring blades 110 have different inclination directions with respect to the rotation direction of the rotating member 76.

On the other hand, each of the two cutting blades 17 fixed to the stirring blade 14'is the same as the cutting blade 17 fixed to the stirring blade 14 according to the first embodiment of the present invention. It has a shape as shown in 7. With reference to FIG. 14B, the cutting blade 17 located on the left side in the drawing (corresponding to the cutting blade 17 in FIG. 15A) has the bent portion 96 oriented toward the left side (inward in the axial direction) in the drawing. It is fixed. On the other hand, the cutting blade 17 located on the right side in the drawing (corresponding to the cutting blade 17 in FIG. 15E) has the bent portion 96 fixed in the direction toward the right side (outward in the axial direction) in the drawing. Here, the cutting bit 94 is attached to the tip of the cutting blade 17, but it is preferable that a similar cutting bit is attached to the outer blade 112 of the second stirring blade 110.

On the other hand, of the pair of stirring blades 14'attached to the tip of the rod portion 12 of the stirring device 10, the other stirring blade 14'different from the stirring blades 14' shown in FIGS. 14 and 15 is, for example, five. The second stirring blade 110 and the two cutting blades 17 of the above, and these are the second stirring blade 110 and the cutting blade 17 of the stirring blade 14'shown in FIGS. 14 and 15 and FIG. There is a symmetrical position and orientation. However, the present invention is not limited to this, and the number of the second stirring blades 110 and the cutting blades 17 may be different between the pair of stirring blades 14', and their mounting positions and mounting angles are left and right. It is not symmetric and may be the same or completely different.

Similarly to the stirring device 10 shown in FIGS. 1 and 2, the stirring device 10 to which a pair of stirring blades 14'according to the second embodiment of the present invention is attached is also the working machine 66 of the heavy machine 64 (FIGS. 9 and 9). (See FIG. 13), and in addition to the rod portion 12, the attachment portion 30, the pipe 32, the air pipe 33, the plurality of protrusions 34, the bending mechanism 40, the shaft rotation mechanism 46, the spiral pipe 52, and the extension It includes a mechanism 58. Therefore, at the time of construction using the stirring device 10 provided with the stirring blade 14', the improving agent is supplied from the pipe 32, the air is supplied from the air pipe 33, and the rod portion 12 is bent by the bending mechanism 40, if necessary. , The shaft rotation of the rod portion 12 by the shaft rotation mechanism 46, the shaft rotation of the spiral pipe 52, the extension of the rod portion 12 by the extension mechanism 58, and the like are performed. Further, the rotation drive unit 20 controlled by the rotation control mechanism 22 controls the rotation direction, rotation speed, rotation torque, etc. of the pair of stirring blades 14'. In particular, in the stirring device 10 provided with a pair of stirring blades 14'according to the second embodiment of the present invention, the pair of stirring blades 14' are rotated in opposite directions to preferably perform stirring. Has been found from experiments.

Here, the stirring blade 14'according to the second embodiment of the present invention is not limited to the configuration shown in FIGS. 14 to 16. For example, the quantity and mounting position of the second stirring blade 110 and the cutting blade 17 may be different from the illustrated example, and any quantity and mounting position can be adopted. Further, the inclination direction and inclination angle of the second stirring blade 110 with respect to the rotation direction of the rotating member 76 are arbitrary, and the distance between the second stirring blades 110 adjacent to the rotating direction of the rotating member 76 is also arbitrary. In accordance with these, the position and quantity of the fixing portions 78 provided on the outer peripheral portion of the rotating member 76 may be adjusted. Further, the shape of the second stirring blade 110 may be different from the examples of FIGS. 14 to 16 as long as it has a plate-like shape and an arc-shaped outer blade 112.

For example, FIG. 17 shows another example in which the inclination and the fixed position of the second stirring blade 110 are different from the example of FIG. Shown. In the example of FIGS. 17A to 17D, the five second stirring blades 110 and the two cutting blades 17 are fixed, and the fixing positions of the two cutting blades 17 are shown in FIG. It is the same as the example of 14 (b). However, in the example of FIG. 14 (b), starting from the second stirring blade 110 at the top in FIG. 14 (b), the second from the bottom, the second from the top, the bottom, and the third from the top. The positions of the rotating members 76 are gradually different from the inside to the outside in the axial direction in the order of the second stirring blades 110. On the other hand, in the examples of FIGS. 17 (a) to 17 (d), starting from the second stirring blade 110 at the top in each figure, the bottom, the second from the top, the second from the bottom, and the top. The positions of the rotating member 76 are gradually different from the inside to the outside in the axial direction in the order of the second stirring blade 110 located third from the first.

Further, when FIG. 17A is confirmed, all of the five second stirring blades 110 are tilted by about 15 ° in the counterclockwise direction with respect to the rotation direction (vertical direction in the drawing) of the rotating member 76. It is fixed. Further, in the example of FIG. 17 (b), the three upper second stirring blades 110 are the same as the example of FIG. 17 (a), and the lower two second stirring blades 110 are , The rotating member 76 is fixed at an angle of about 15 ° in the clockwise direction with respect to the rotation direction. Further, in the examples of FIGS. 17 (c) and 17 (d), in comparison with the example of FIG. 17 (b), the second stirring blade 110 from the top is counterclockwise with respect to the rotation direction of the rotating member 76. The tilt angle in the direction is increasing, increasing to about 20 ° in the example of FIG. 17 (c) and to about 25 ° in the example of FIG. 17 (d).

By the way, according to the second embodiment of the present invention having the above configuration, it is possible to obtain the following effects. That is, in the stirring blade 14'according to the second embodiment of the present invention, as shown in FIGS. 14 and 15, the plurality of stirring blades 15 include the second stirring blade 110. With reference to FIG. 16, the second stirring blade 110 has a plate shape extending radially outward from the outer peripheral portion of the rotating member 76, and has an arc-shaped outer blade 112 at the tip portion thereof. Therefore, a part of the thin outer peripheral portion connecting the outer edges of the two plate-shaped surfaces 110a and 110b forms an arc-shaped outer blade 112, and the outer blade 112 radiates the rotating member 76. It is directed in the direction. Further, the second stirring blade 110 is fixed so as to be inclined with respect to the rotation direction of the rotating member 76, so that the entire inclined portion 100 is formed.

With such a configuration, when the second stirring blade 110 is rotationally moved by the rotation of the rotating member 76, the ground-forming soil in contact with the two surfaces 110a and 110b of the plate-shaped second stirring blade 110 is generated by the rotating member 76. Is forcibly moved along the tilting direction of the second stirring blade 110 with respect to the rotation direction of. As a result, the ground-forming soil in contact with the second stirring blade 110 can be moved in the rotation direction and the axial direction of the rotating member 76, so that the stirring efficiency of the ground G (see FIG. 9) can be further improved. it can. Further, since the outer blade 112 of the second stirring blade 110 directed in the radial direction of the rotating member 76 can stir while cutting down the ground-forming soil, the stirring efficiency of the ground G can also be improved. It will be possible.

Further, in the stirring blade 14'according to the second embodiment of the present invention, the plurality of stirring blades 15 include a plurality of second stirring blades 110, and the plurality of second stirring blades 110 are rotating members. The tilt direction and / or tilt angle with respect to the rotation direction of 76 are different from each other. That is, among the plurality of second stirring blades 110, the second stirring blade 110 having a different inclination direction and / or inclination angle with respect to the rotation direction of the rotating member 76 as compared with the other second stirring blade 110. , At least one is included. As a result, the plurality of second stirring blades 110 whose inclination directions and / or inclination angles are different from each other so that the ground forming soil is formed in the direction corresponding to each inclination direction and inclination angle of the second stirring blades 110. Since it can be forcibly moved, the ground-forming soil can be moved in various directions, and the stirring efficiency of the ground G can be further improved.
In addition, in the stirring blade 14'according to the second embodiment of the present invention, if the cutting bit is attached to the outer blade 112 of the second stirring blade 110, the outer blade of the second stirring blade 110 It is possible to efficiently cut down the ground forming soil by 112, and it is also possible to cope with the agitation of the harder ground G.

Further, in the stirring blade 14'according to the second embodiment of the present invention, at least a part of the stirring blades 15 (second stirring blades 110) of the stirring blades 15 is in the circumferential direction of the rotating member 76. By arranging them at unequal intervals, a gap having a size different from that of the other stirring blades 15 is formed around the stirring blades 15 arranged at unequal intervals. That is, the stirring blades 15 arranged at unequal intervals have a different size of the gap formed between the stirring blades 15 and the adjacent stirring blades 15 than the stirring blades 15 arranged at equal intervals. Even among the stirring blades 15 arranged at equal intervals, the size of the peripheral gap is different for each stirring blade 15. Therefore, the ground-forming soil that passes through such a gap when the stirring blade 14'rotates can be moved in irregular directions through gaps of various sizes, which is combined with the stirring action due to the shapes of the plurality of stirring blades 15. , The stirring efficiency of the ground G can be improved.

Further, the stirring blade 14'according to the second embodiment of the present invention has five stirring blades 15 (second stirring blades 110) fixed to the outer peripheral portion of the rotating member 76, and these five stirring blades 15 The stirring blades 15 are fixed so as to be at least partially unequally spaced in the circumferential direction of the rotating member 76. Accordingly, as in the examples of FIGS. 14 and 17, five stirring blades 15 are fixed to five of the six locations on the outer peripheral portion of the rotating member 76 that are evenly spaced in the rotation direction of the rotating member 76. In this case, a gap larger than the other gaps is formed in one place where the stirring blade 15 is not fixed. Therefore, such a large gap can change the movement route of the ground-forming soil, and the stirring efficiency of the ground G can be improved.

Subsequently, with reference to FIGS. 18 to 20, the stirring blade 14 ”according to the third embodiment of the present invention will be described. In FIGS. 18 to 20, the first embodiment of the present invention is described. The same parts as those of the stirring blade 14 or the corresponding parts are designated by the same reference numerals. Note that the stirring blade 14 "according to the third embodiment of the present invention is the first embodiment of the present invention. Only the portion different from the stirring blade 14 according to the embodiment will be described, and the description of the configuration and the like of the same portion as the stirring blade 14 according to the first embodiment of the present invention will be omitted.

In the stirring blade 14 "according to the third embodiment of the present invention, a plurality of third stirring blades 130 are fixed as a plurality of stirring blades 15 on the outer peripheral portion of the rotating member 76. Similar to the stirring blade 14, a pair of the stirring blades 14 "are attached to the tip of the rod portion 12 of the stirring device 10, and the pair of stirring blades 14" are attached to each other with the tip portion 12a of the rod portion 12 interposed therebetween. Further, in the pair of stirring blades 14 ", the angle α formed between each rotating shaft 18 and the extending direction of the rod portion 12 is directed toward the tip end side (lower side in the drawing) of the rod portion 12. It is slightly tilted so that it is smaller than 90 °. Then, FIG. 18A shows one of such a pair of stirring blades 14 "in the direction in which the rotation axis 18 is horizontally arranged. Further, the pair of stirring blades 14" are shown. Like the stirring blade 14, each of the above has a built-in rotation drive unit 20 including a rotation control mechanism 22 and a rotation assist control unit 62, and is rotated by the rotation drive unit 20.

Further, in FIG. 18B, the outer peripheral portion of the rotating member 76 of one of the stirring blades 14 ”is developed in a pseudo-planar shape, and the third stirring blade 130 is fixed to the outer peripheral portion of the rotating member 76. The arrangement of the cutting blades 17 and the cutting blades 17 is shown. That is, the rotating member 76 shown in FIG. 18 (b) has a cylindrical shape in which the upper and lower ends in FIG. 18 (b) are originally connected. Further, the left-right direction of FIG. 18 (b) corresponds to the left-right direction of FIG. 18 (a). As can be confirmed in FIG. 18 (b), the stirring blade 14 "has six third pieces. The stirring blade 130 and the two cutting blades 17 are attached, and as will be described in detail later, each of the six second stirring blades 110 is attached to the rotating member 76 in the rotation direction (up and down in FIG. 18B). An extending portion 136 extending in a direction deviating from the direction) is formed. In addition, in FIG. 18A, imagining that the six third stirring blades 130 and the two cutting blades 17 rotate and move due to the rotation of the rotating member 76, the third stirring blade 130 and the cutting are performed. The blades 17 are illustrated by solid lines and virtual lines.

On the outer peripheral portion of the rotating member 76 of the stirring blade 14 ”, a fixing portion 78 (see FIG. 19) for fixing the third stirring blade 130 and the cutting blade 17 detachably is provided on the rotation direction and shaft of the rotating member 76. It is provided at a plurality of positions spaced apart in the direction. In this embodiment, it is fixed at 18 places in total, 3 rows with a space in the axial direction and 6 places with a space in the rotation direction in each row. A portion 78 is provided, and in FIGS. 19A to 19C, the fixed portions 78 of each row of the stirring blades 14 ”shown in FIG. 18 are shown by broken lines. The stirring blades 14 ”shown in FIGS. 19A to 19C have the same rotation phase.

As confirmed from FIG. 19A, in the axially inner portion of the stirring blade 14 ”, two third stirring blades 130 and one cutting blade 17 are located at three of the six fixing portions 78. The two third stirring blades 130 are located at positions 180 ° out of phase with each other, and correspond to the two upper and lower third stirring blades 130 on the left side in FIG. 18 (b). One cutting blade 17 corresponds to the cutting blade 17 on the left side in FIG. 18 (b). Checking FIG. 19 (b), the axial intermediate portion of the stirring blade 14 "is , Two third stirring blades 130 are fixed to the two fixing portions 78 whose phases are different from each other by 180 ° among the six fixing portions 78. These two third stirring blades 130 correspond to the two upper and lower third stirring blades 130 near the center in the left-right direction in FIG. 18B. Further, when FIG. 19 (c) is confirmed, two third stirring blades 130 and one cutting are performed at three of the six fixing portions 78 on the axially outer portion of the stirring blade 14 ". The blades 17 and the blades 17 are fixed. The two third stirring blades 130 are located at positions 180 ° out of phase with each other, and correspond to the two upper and lower third stirring blades 130 on the right side in FIG. 18B. One cutting blade 17 corresponds to the cutting blade 17 on the right side in FIG. 18B.

Then, as can be confirmed in FIGS. 19 (a) to 19 (c), the two third stirring blades 130 in FIG. 19 (a) are the two second ones in each of FIGS. 19 (b) and 19 (c). It is arranged at a position different in phase from the stirring blade 130 of 3. On the other hand, the two third stirring blades 130 shown in FIG. 19B and the two third stirring blades 130 shown in FIG. 19C are arranged at the same phase, but the third one. The mounting directions of the stirring blades 130 are different from each other. The difference in the mounting direction will be described later. That is, the six third stirring blades 130 are fixed at four of the positions where the outer peripheral portion of the rotating member 76 is divided into six equal parts along the rotation direction, and the third stirring blade 130 is adjacent to the rotation direction. The distance between the stirring blades 130 is partially unequal. In FIG. 18B, such a position divided into six equal parts is shown by a two-dot chain line. On the other hand, the cutting blade 17 of FIG. 19A and the cutting blade 17 of FIG. 19C are at positions different from each other by 120 ° in phase. The stirring blade 14 "in FIG. 19 is normally rotated clockwise on the rotating shaft 18.

Of the six third stirring blades 130 fixed to the stirring blade 14 ", the third stirring blade 130 located above the vicinity of the center in the left-right direction in FIG. 18B and the third stirring blade 130 located below the right side. The stirring blade 130 of No. 3 has a shape as shown in FIG. 20, that is, the third stirring blade 130 has a mounting portion 132, an extending portion 136, and a plate portion 144. Each of these has a plate shape. In the mounting portion 132, the lower portion in FIG. 20 (b) is fixed to the fixing portion 78 provided on the rotating member 76 of the stirring blade 14 ”. However, in FIG. 20, the illustration of the insertion hole or the like for fixing to the fixing portion 78 by bolting or the like is omitted.

Confirming FIG. 20B, the extending portion 136 extends from the upper right portion of the mounting portion 132 to the right side in a sickle shape, and the upper and lower ends of the arc shape are the outer blade portion 140 and the inner blade portion 138. Is forming. Further, the extending portion 136 is bent and extends from the mounting portion 136 toward the upper side in FIG. 20 (a) and the right side in FIG. 20 (c). One surface 144a of the plate portion 144 is attached along the inner blade portion 138, and in the example of FIG. 20, it extends longer than the tip of the extending portion 136. Further, the plate portion 144 has a width larger than the thickness of the inner blade portion 138 (thickness of the extending portion 136), and is orthogonal to the extending direction of the inner blade portion 138 on both sides (in FIG. 20A). It projects to both the upper and lower sides and the left and right sides in FIG. 20 (c).

On the other hand, of the six third stirring blades 130 fixed to the stirring blade 14 ", the four third stirring blades 130 are located at two upper and lower locations on the left side in FIG. The third stirring blade 130 is different from the third stirring blade 130 shown in FIG. 20 only in the bending direction of the extending portion 136, and the remaining parts have exactly the same structure. Specifically, for example, referring to FIG. 20 (a), the extending portion 136 extending from the mounting portion 132 extends not in the upper right direction in the figure but in the lower right direction in the figure, and the plate is accordingly. The portion 144 also extends in the lower right direction in the figure.
Then, in a state where the six third stirring blades 130 having either of the above-mentioned shapes are fixed to the rotating member 76 as shown in FIGS. 18 and 19, the mounting portion 132 of the rotating member 76 It extends radially outward from the outer peripheral portion, and its two surfaces 132a and 132b (see FIG. 20) are orthogonal to the axial direction (left-right direction in FIG. 18) of the rotating member 76. Further, the extending portion 136 extends in a direction deviating from the rotation direction of the rotating member 76 to form the inclined portion 100.

Further, the six third stirring blades 130 are attached in different bending directions of the extending portion 136 as described above, or are attached in opposite directions in the rotating direction of the rotating member 76, as shown in FIG. 18 (b). In a virtual plan view, the extending direction of the extending portion 136 is divided into four patterns. That is, in the three third stirring blades 130 located at the upper and lower two places on the left side and the upper right side in FIG. 18B, the extending portion 136 extends from the mounting portion 132 in the upper right direction, and the extending portion 136 extends downward on the right side. In the third stirring blade 130 located, the extending portion 136 extends from the mounting portion 132 in the upper left direction. Further, in the third stirring blade 130 located above the vicinity of the center in the left-right direction in FIG. 18B, the extending portion 136 extends from the mounting portion 132 in the lower right direction and is located below the vicinity of the center in the left-right direction. In the third stirring blade 130, the extending portion 136 extends from the mounting portion 132 in the lower left direction. Therefore, the two surfaces 136a and 136b (see FIG. 20) of the extending portion 136 are oriented in different directions from each other in the third stirring blades 130 according to the extending direction of each extending portion 136.

In addition, all of the extending portions 136 of the six third stirring blades 130 are spaced radially outward from the outer peripheral portion of the rotating member 76 in the axial view of the rotating member 76 as shown in FIG. At the position, it extends from the mounting portion 132 along the circumferential direction of the rotating member 76. On the other hand, the plate portion 144 extends along the extending portion 136 in the same direction as the extending portion 136, and one surface 144a has the diameter of the rotating member 76 so that FIGS. 19 and 20 can be confirmed together. The other surface 144b is directed outward in the direction toward the outer peripheral surface of the rotating member 76.

Further, each of the two cutting blades 17 fixed to the stirring blade 14 "is the same as the cutting blade 17 fixed to the stirring blade 14 according to the first embodiment of the present invention. It has a shape as shown in FIG. 7. With reference to FIG. 18B, the cutting blade 17 located on the left side in the drawing (corresponding to the cutting blade 17 in FIG. 19A) has a bent portion 96. Is fixed in the direction toward the left side (inside in the axial direction) in the drawing. On the other hand, the cutting blade 17 (corresponding to the cutting blade 17 in FIG. 19C) located on the right side in the drawing has a bent portion 96. It is fixed in the direction toward the right side (outside in the axial direction) in the figure.

On the other hand, of the pair of stirring blades 14 "attached to the tip of the rod portion 12 of the stirring device 10, the other stirring blade 14" different from the stirring blades 14 "shown in FIGS. The third stirring blade 130 and the two cutting blades 17 of the above, and these are the third stirring blade 130 and the cutting blade 17 of the stirring blade 14 ”shown in FIGS. 18 and 19 and FIG. There is a symmetrical position and orientation. However, the present invention is not limited to this, and the number of the third stirring blades 130 and the cutting blades 17 may be different between the pair of stirring blades 14 ", and their mounting positions and the like may be symmetrical. It may be the same or completely different.

Similarly to the stirring device 10 shown in FIGS. 1 and 2, the stirring device 10 to which a pair of stirring blades 14 ”according to the third embodiment of the present invention is attached is also the working machine 66 (FIG. 9 and FIG. (See FIG. 13), and in addition to the rod portion 12, the attachment portion 30, the pipe 32, the air pipe 33, the plurality of protrusions 34, the bending mechanism 40, the shaft rotation mechanism 46, the spiral pipe 52, and the extension The mechanism 58 is included. Therefore, at the time of construction using the stirring device 10 provided with the stirring blade 14 ”, the improving agent is supplied from the pipe 32, the air is supplied from the air pipe 33, and the refraction mechanism is used. The bending of the rod portion 12 by the 40, the shaft rotation of the rod portion 12 by the shaft rotation mechanism 46, the shaft rotation of the spiral pipe 52, the extension of the rod portion 12 by the extension mechanism 58, and the like are performed. Further, the rotation drive unit 20 controlled by the rotation control mechanism 22 controls the rotation direction, rotation speed, rotation torque, etc. of the pair of stirring blades 14 ".

Here, the stirring blade 14 "according to the third embodiment of the present invention is not limited to the configurations shown in FIGS. 18 to 20. For example, the third stirring blade 130 and the cutting blade 17 The quantity and mounting position of the third stirring blade 130 may be different from the illustrated example, and any quantity and mounting position can be adopted. Further, the mounting direction of the third stirring blade 130 with respect to the rotation direction of the rotating member 76 is also arbitrary. The distance between the third stirring blades 130 adjacent to each other in the rotation direction of the rotating member 76 is also arbitrary. In accordance with these, the position and quantity of the fixing portions 78 provided on the outer peripheral portion of the rotating member 76 may be adjusted. Further, the shape of the third stirring blade 130 may be different from the example of FIGS. 18 to 20 as long as it has the attachment portion 132 and the extending portion 136.

By the way, according to the third embodiment of the present invention having the above configuration, it is possible to obtain the following effects. That is, in the stirring blade 14 "according to the third embodiment of the present invention, as shown in FIGS. 18 and 19, the plurality of stirring blades 15 include the third stirring blade 130, and the third stirring blade 130 is included. The blade 130 has a mounting portion 132 and an extending portion 136. The mounting portion 132 extends radially outward from the outer peripheral portion of the rotating member 76 and forms a plate shape orthogonal to the axial direction of the rotating member 76. Therefore, with reference to FIG. 20, the mounting portion 132 has a thin outer peripheral portion that connects the outer edges of the two plate-shaped surfaces 132a and 132b in the rotation direction and the radial direction of the rotating member 76. A plate-shaped extending portion 136 also extends from the outer peripheral portion of such a mounting portion 132.

Specifically, the extending portion 136 is formed from the mounting portion 132 to the rotating member 76 at a position spaced radially outward from the outer peripheral portion of the rotating member 76 in the axial view of the rotating member 76 as shown in FIG. Extends along the circumferential direction of. Therefore, the extending portion 136 faces the outer peripheral portion of the rotating member 76 in the axial view of the rotating member 76 on the thin outer peripheral portion connecting the outer edges of the two plate-shaped surfaces 136a and 136b. The circumference of the rotating member 76 is mainly directed outward in the radial direction at the end of the inner blade portion 138 extending along the circumferential direction of the rotating member 76 at the position and the end opposite to the inner blade portion 138. An outer blade portion 140 extending along the direction is formed to form a roughly sickle shape.

Then, in the third stirring blade 130, such an extending portion 136 extends in a direction deviating from the circumferential direction of the rotating member 76, so that the extending portion 136 forms the inclined portion 100. That is, the third stirring blade 130 is a plan view overlooking the outer peripheral portion of the rotating member 76 as shown in FIG. 18B, and although the mounting portion 132 is arranged along the rotation direction of the rotating member 76, it extends. The portion 136 extends in a direction deviating from the circumferential direction of the rotating member 76 in such a manner that the portion 136 bends from the mounting portion 132. With such a configuration, when the rotating member 76 rotates and the third stirring blade 130 rotates and moves, the plate-shaped mounting portion 132 and the extending portion 136 are formed on the two surfaces 132a, 132b, 136a and 136b, respectively. The ground-forming soil in contact can be forcibly moved along the extending direction of each surface. As a result, the ground-forming soil in contact with the third stirring blade 130 can be moved in the rotation direction and the axial direction of the rotating member 76, so that the stirring efficiency of the ground G (see FIG. 9) can be further improved. It will be possible.

Further, in the stirring blade 14 "according to the third embodiment of the present invention, the plurality of stirring blades 15 include a plurality of third stirring blades 130, and the plurality of third stirring blades 130 are extended. The extending directions of the portions 136 are opposite to each other in the rotation direction of the rotating member 76. That is, in the plurality of third stirring blades 130, the axial view of the rotating member 76 as shown in FIG. 19 The third stirring blade 130, in which the extending portion 136 extends in the same direction as the rotating member 76, and the extending portion 136 extend in the direction opposite to the rotating direction of the rotating member 76. A third stirring blade 130 is included. Therefore, when the plurality of third stirring blades 130 rotate and move, the ground forming soil is brought into contact with the two surfaces 132a and 132b of the mounting portion 132, and then the ground forming soil is brought into contact with the two surfaces 132a and 132b. A pattern of contacting and moving the two surfaces 136a and 136b of the extending portion 136, and contacting the two surfaces 136a and 136b of the extending portion 136 and then contacting the two surfaces 132a and 132b of the mounting portion 132. It can be moved in various movement patterns such as a moving pattern. Therefore, the ground forming soil can be moved in various directions, and the stirring efficiency of the ground G can be further improved.

Further, in the stirring blade 14 "according to the third embodiment of the present invention, a plate portion 144 extending along the inner blade portion 138 is attached to the inner blade portion 138 of the extending portion 136 of the third stirring blade 130. That is, the plate portion 144 has a width larger than the thickness of the inner blade portion 138 and protrudes to both sides orthogonal to the extending direction of the inner blade portion 138, and one of the plate portions 144 is formed. The vicinity of the center in the width direction of the other surface 144a is connected to the inner blade portion 138 so that the surface 144b faces the outer peripheral portion of the rotating member 76. Therefore, in addition to the mounting portion 132 and the extending portion 136, The ground forming soil can also be moved by the plate portion 144, and the plate portion 144 has a surface 144a protruding from both sides of the inner blade portion 138 and mainly directed outward in the radial direction of the rotating member 76, and the rotating member 76. It has two surfaces, one facing the outer peripheral portion of the surface 144b and the other facing the surface of the mounting portion 132 and the extending portion 136. Therefore, the ground is formed so as to be scooped up by the plate portion 144. With the addition of soil movement, it becomes possible to further improve the stirring efficiency of the ground G.

Here, in the stirring blade 14 according to the embodiment of the present invention, stirring blades 15 having various shapes may be mixed on the outer peripheral portion of the rotating member 76. That is, any of the first stirring blade 16 as shown in FIG. 5, the second stirring blade 110 as shown in FIG. 16, and the third stirring blade 130 as shown in FIG. 20. Of the stirring blades 15 having different shapes, those having any two or more shapes may be mixed in one stirring blade 14. Further, as a matter of course, the cutting blade 17 may be further included therein, and the positions and arrangement intervals of the stirring blade 15 and the cutting blade 17 are also arbitrary.

On the other hand, the mechanical stirring method according to the embodiment of the present invention utilizes the stirring blades 14, 14', 14 "related to the first to third embodiments of the present invention as described above. As shown in 1, FIG. 3, FIG. 14, FIG. 15, FIG. 18, and FIG. 19, the properties of the ground G are formed on the outer peripheral portion of the rotating member 76 which is roughly cylindrical in the stirring blades 14, 14', 14 ". Optionally, the plurality of stirring blades 15 and / or the plurality of cutting blades 17 are detachably fixed at arbitrary positions spaced apart from each other. At this time, as the stirring blade 15, the first stirring blade 16 as shown in FIGS. 3 to 6 and 11, the second stirring blade 110 as shown in FIGS. 14 to 17, and FIGS. 18 to 20 A third stirring blade 130 or the like as shown in is used. Further, the cutting blade 17 has a plate shape orthogonal to the axial direction of the rotating member 76 as shown in FIGS. 3, 4, 7, and 12, and the rotating member 76 is viewed in the axial direction of the rotating member 76. A cutting blade 17 having a size larger than that of the stirring blade 15 in a direction orthogonal to the outer peripheral portion of the rotating member 76 and a size smaller than that of the stirring blade 15 in a direction parallel to the rotation direction of the rotating member 76 is used.

The mechanical stirring method according to the embodiment of the present invention has the same function and effect corresponding to the stirring blades 14, 14', 14 ″ according to the first to third embodiments of the present invention by the above configuration. In particular, for example, when stirring a relatively soft ground G, only the stirring blades 15 or more stirring blades 15 than the cutting blades 17 are fixed to the rotating member 76, and the relatively hard ground G is formed. When stirring, the stirring blades 14, 14', 14 "are configured according to the properties of the ground G, such as fixing only the cutting blades 17 to the rotating member 76 or fixing more cutting blades 17 than the stirring blades 15. Can be changed. Further, since the fixing positions of the stirring blades 15 and the cutting blades 17 are arbitrary, such as arranging the stirring blades 15 and the cutting blades 17 alternately, the stirring blades having an optimum configuration considering the properties of the ground G and the construction conditions. By using 14, 14'and 14 ", it is possible to optimize the stirring efficiency.

10, 10': Stirrer, 14 (14A, 14B), 14', 14 ": Stirring blade, 15: Stirring blade, 16: First stirring blade, 17: Cutting blade, 18: Rotating shaft, 64 (64A , 64B): Heavy machine, 66: Working machine, 76: Rotating member, 78: Fixed part, 80: Root part, 82: Outer blade part, 86: Notch, 90: Through hole, 100: Inclined part, 110: No. 2 stirring blades, 112: outer blade, 130: third stirring blade, 132: mounting part, 136: extending part, 138: inner blade part, 144: plate part, G: ground

Claims (15)

A stirring blade that stirs the ground while rotating at the tip of a stirring device attached to a heavy machine.
A rotating member having a substantially cylindrical shape and a plurality of stirring blades fixed to the outer peripheral portion of the rotating member are included.
A stirring blade, wherein at least a part of the stirring blades has a plate-shaped inclined portion inclined with respect to the rotation direction of the rotating member. The plurality of stirring blades form a plate shape orthogonal to the axial direction of the rotating member, and when viewed in the axial direction of the rotating member, the outside from the base portion to the rotating member with the rotation axis of the rotating member as the center. Includes a first stirring vane having an outer blade portion that extends in an arc in a direction opposite to the direction of rotation of the rotating member.
The first stirring blade is formed so that the inclined portion is formed by bending the end side opposite to the rotating direction of the rotating member in a direction deviating from the extending direction of the outer blade portion. The stirring blade according to claim 1, wherein the stirring blade is characterized. The first stirring blade is located at a position closer to the rotation direction of the rotating member than the base portion and at a position closer to the rotating member than the outer blade portion in the axial view of the rotating member. The stirring blade according to claim 2, wherein a notch having a shape following the outer blade portion is provided. The second or third aspect of the invention, wherein the first stirring blade is provided with through holes penetrating from one surface of the plate to the other surface at least at a plurality of places excluding the root portion. Stirring blade. The plurality of stirring blades include a second stirring blade having a plate shape extending radially outward from the outer peripheral portion of the rotating member and having an arc-shaped outer blade at the tip portion thereof.
Any of claims 1 to 4, wherein the second stirring blade is fixed by being inclined with respect to the rotation direction of the rotating member, so that the entire second stirring blade forms the inclined portion. The stirring blade according to item 1. The stirring blade according to claim 5, wherein the plurality of stirring blades include a plurality of the second stirring blades having different tilt directions and / or tilt angles with respect to the rotation direction of the rotating member. The stirring blade according to claim 5 or 6, wherein the second stirring blade has a cutting bit attached to the outer blade. The plurality of stirring blades extend outward in the radial direction from the outer peripheral portion of the rotating member, and form a plate-like mounting portion orthogonal to the axial direction of the rotating member, and the rotating member in the axial view of the rotating member. A third stirring blade having a plate-shaped extending portion extending from the mounting portion along the circumferential direction of the rotating member at a position spaced outward in the radial direction from the outer peripheral portion is included.
The third stirring blade is characterized in that the extending portion extends in a direction deviating from the circumferential direction of the rotating member, whereby the inclined portion is formed by the extending portion. The stirring blade according to any one of 1 to 7. The stirring blade according to claim 8, wherein the plurality of stirring blades include a plurality of the third stirring blades in which the extending directions of the extending portions are opposite to each other in the rotation direction of the rotating member. Wings. The third stirring blade has a width larger than the thickness of the inner blade portion of the inner blade portion of the extending portion and projects on both sides orthogonal to the extending direction of the inner blade portion. The stirring blade according to claim 8 or 9, wherein a plate portion extending along the inner blade portion is attached. The stirring blade according to any one of claims 1 to 10, wherein at least a part of the stirring blades is arranged at irregular intervals in the circumferential direction of the rotating member. The stirring blade according to claim 11, wherein the plurality of stirring blades are five and are fixed so as to be at least partially unequally spaced in the circumferential direction of the rotating member. Including a plurality of cutting blades fixed to the outer peripheral portion of the rotating member,
Each of the plurality of cutting blades has a plate shape orthogonal to the axial direction of the rotating member, and the size of the plurality of cutting blades in the direction orthogonal to the outer peripheral portion of the rotating member in the axial direction of the rotating member is the plurality. 1 of any one of claims 1 to 12, characterized in that the size of the stirring blade is larger than that of each of the stirring blades and the size of the rotating member in the direction parallel to the rotation direction is smaller than that of each of the plurality of stirring blades. The stirring blade according to the item. The claim is characterized in that the rotating member has a fixing portion capable of detachably fixing the stirring blade and the cutting blade at a plurality of positions spaced apart in the rotation direction and the axial direction along the outer peripheral portion thereof. Item 13. The stirring blade according to item 13. It is a mechanical stirring method that stirs the ground using a stirring blade that rotates at the tip of a stirring device attached to a heavy machine.
A plurality of stirring blades and / or a plurality of cutting blades can be selectively attached to and detached from each other at arbitrary positions spaced apart from each other on the outer peripheral portion of the rotating member having a substantially cylindrical shape of the stirring blade, depending on the properties of the ground. Fixed to
As the stirring blade, a stirring blade having a plate-shaped inclined portion inclined with respect to the rotation direction of the rotating member is used.
The cutting blade has a plate shape orthogonal to the axial direction of the rotating member, and the size of the cutting blade in the direction orthogonal to the outer peripheral portion of the rotating member in the axial direction of the rotating member is larger than that of the stirring blade. Moreover, a mechanical stirring method characterized by using a cutting blade whose size in a direction parallel to the rotation direction of the rotating member is smaller than that of the stirring blade.

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