JP7194621B2 - Stirrer and mechanical stirring method using the same - Google Patents

Description

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

When constructing various buildings, ground improvement is carried out if the local ground is soft. There are various methods for ground improvement, one of which is the mechanical agitation method, which mixes and agitates ground-forming soil and improvement material with a rotating stirring blade to form an improvement body in the ground. be. Stirring devices equipped with such stirring blades are usually used by being attached to heavy machinery, and various devices have been devised for the purpose of improving the efficiency of construction (see, for example, Patent Documents 1 to 3). .

JP 2007-277955 A Japanese Patent No. 5203167 Japanese Patent No. 4038525

Here, in the mechanical stirring method using the conventional stirring device described above, for example, when there is an obstacle in the ground, the heavy machine is moved each time in order to avoid the obstacle and perform stirring. I needed it. In addition, in order to form the ends of the improved body on a plane, it is necessary to arrange the heavy machinery in a direction substantially perpendicular to the plane, and in this case also, the heavy machinery has to be moved. Such movement of heavy machinery during construction is a factor that deteriorates work efficiency.
The present invention has been made in view of the above problems, and an object of the present invention is to suppress the frequency of movement of heavy machinery in the mechanical stirring method and improve work efficiency.

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

(1) A stirring device that is attached to a working machine of a heavy machine and stirs the ground while supplying an improving material and / or air, wherein the rod part and the power supplied from the heavy machine are used to rotate, A pair of stirring blades attached to the tip of the rod part so that the ground is stirred by a plurality of cutting blades provided on the outer periphery, and the rotation axis thereof is orthogonal or substantially orthogonal to the extending direction of the rod part; a mounting portion for mounting the rod portion to the work machine such that the tip of the rod portion faces downward in front of the heavy machinery and the pair of stirring blades are positioned on the left and right sides in the lateral direction of the heavy machinery; and a bending mechanism for bending the middle part to the tip of the rod part toward the heavy machine side with respect to the extending direction of the rod part by using the power supplied from the heavy machine. device.

The stirring device described in this section includes a rod portion, a pair of stirring blades attached to the tip of the rod portion, and an attachment portion for attaching the rod portion to the work machine. Each of the pair of stirring blades is rotated by power supplied from a heavy machine, and stirs the ground with a plurality of cutting blades provided on the outer circumference while rotating. Also, the pair of stirring blades is attached to the tip of the rod portion so that the respective rotating shafts are orthogonal or substantially orthogonal to the extending direction of the rod portion. As a result, a plurality of cutting blades rotating along the outer periphery of the stirring blade are directed in the direction in which the tip of the rod portion is directed. Further, the rod portion is attached to the work machine by the attachment portion such that the tip of the rod portion faces downward in front of the heavy machinery and the pair of stirring blades are positioned on the left and right sides of the heavy machinery. . For this reason, the plurality of cutting blades of the stirring blades are mainly used downward, and while the ground is excavated by such a pair of stirring blades, the ground formation soil, the improvement material and / or air are mixed and stirred. be.

Further, the stirrer described in this section is provided with a bending mechanism, and this bending mechanism utilizes power supplied from the heavy machinery to extend the length of the rod from the middle portion to the tip of the rod in the extending direction of the rod. It is to be refracted to the heavy machinery side. As a result, the tip of the rod can be directed not only in the direction in which the rod extends, but also in the direction of the heavy equipment where the rod is bent, so the direction of excavation and stirring can be switched without moving the heavy equipment. will be In particular, even when obstacles such as pipes are present in the ground, the area below the obstacles is agitated while avoiding the obstacles by means of the bent rod portion without moving the heavy machinery. Therefore, the frequency of movement of heavy machinery during construction is suppressed, and work efficiency is improved.

(2) In the above item (1), the power supplied from the heavy equipment is used to rotate the rod part counterclockwise and around the axis parallel to the extension direction of the rod part in the non-bent state as the rotation axis. An agitator comprising an axial rotation mechanism for axial rotation of at least up to 90° in each clockwise direction .
The stirrer described in this section further comprises an axial rotation mechanism, and this axial rotation mechanism utilizes power supplied from a heavy machine to rotate the rod portion in parallel with the extending direction in the non-bending state. The rod portion is rotated about the shaft as the rotation axis. The shaft rotation of the rod portion by this shaft rotation mechanism is at least 90 degrees at maximum in both counterclockwise and clockwise directions, that is, within a range of at least 180 degrees with respect to the front direction of the working machine.

Here, when improving the ground using a stirring device, in order to form the end of the construction range (improved body) in a plane, considering the mounting direction of the stirring blade, the plane of the improved body is usually It is necessary to place the heavy equipment in a direction that is substantially perpendicular to the However, in the agitator described in this section, as described above, since the rod portion is rotated by the shaft rotation mechanism, the planar end located in the front direction of the heavy machine or the opposite front direction of the construction range can be used. It can be applied not only to the part but also to the planar end part located in the lateral direction of the heavy equipment. As a result, it is possible to construct flat ends located in various directions of the construction area without moving the heavy machinery, which also reduces the frequency of movement of the heavy machinery and improves work efficiency. It will be. Furthermore, even at times other than the timing of constructing the planar end of the construction range, for example, when stirring the ground at the timing of finishing construction, etc., the shaft rotation mechanism rotates the rod part counterclockwise and clockwise alternately. It may be rotated and oscillated. By doing so, compared to the case where the rod is not oscillated, the range to be agitated when the tip of the rod is moved along the same trajectory is widened, so that construction efficiency is improved.

(3) In the above item (2), a rotary drive unit for rotating the pair of stirring blades using power supplied from the heavy equipment is separately provided for each stirring blade at the tip of the rod portion. and each of the rotation drive units is provided with a rotation control mechanism capable of controlling the rotation direction, the number of rotations and the rotation torque of the stirring blade, and when the rod is rotated by the shaft rotation mechanism, the A stirring device comprising a rotation assisting control section for controlling each of the rotation control mechanisms so as to rotate the pair of stirring blades in a direction to assist rotation of the shaft (claim 1 ).

The stirring device according to this section includes a rotation drive unit for rotating the pair of stirring blades by power supplied from heavy machinery, separately provided for each stirring blade at the tip of the rod portion, and further rotating each blade. The part is provided with a rotation control mechanism capable of controlling the rotation direction, rotation speed and rotation torque of the stirring blade. As a result, for example, when a pair of stirring blades are rotated in the same direction, the stirring blades may advance in an unintended direction due to the force resisting the rotation, resulting in insufficient stirring in some places. By rotating the blades in directions opposite to each other, the force resisting the rotation of the stirring blades is canceled and the direction in which the stirring blades advance is stabilized, thereby suppressing the occurrence of insufficient stirring. Furthermore, even if the stirring blades move in an unintended direction, the direction can be easily corrected by rotating the stirring blades in the opposite direction, so that the loss of construction time can be reduced. Also, by controlling the rotational torque, etc., the tip load with respect to the pushing force into the ground is controlled, so that the bending of the hole and the resulting insufficient stirring can be suppressed.

In addition, in the stirring device described in this section, each of the rotation control mechanisms rotates the pair of stirring blades in a direction that assists the shaft rotation when the rod portion is rotated by the shaft rotation mechanism. It includes a rotation assist control unit for controlling. Here, the directions of rotation of the pair of stirring blades controlled by the rotation assistance control section are usually opposite to each other. As a result, particularly when the rod portion is axially rotated so as to swing as described in the above item (2), the rotation direction of the pair of stirring blades can be switched according to the direction of the axial rotation. As a result, the axial rotation of the rod portion and the switching of the axial rotation direction can be performed smoothly, thereby improving work efficiency.

(4) In the above item ( 3), a pipe for supplying the improving material and/or the air to the vicinity of the pair of stirring blades extends along at least a part of the rod portion and outside the rod portion. One or two stirring devices are attached detachably to the pipe and the position of the discharge port of the pipe is adjustable (Claim 2 ).
In the stirring device according to this section, a pipe for supplying soil improvement material and / or air (air) to the vicinity of a pair of stirring blades is provided along at least a part of the rod portion outside the rod portion One or two can be detachably attached to the . At this time, each pipe may supply only the improving material, may supply only air, or may supply the improving material and air at the same time. Then, when two pipes are attached, any two supply patterns may be selected from the above three supply patterns, including a combination of the same supply patterns. Also, the supply pattern of each pipe may be changed during use.

Here, many of the conventional stirring devices have a pipe for supplying the improving material installed inside the rod part, and did not correspond to the replacement of the pipe, etc. could only supply In particular, since conventional piping was made of steel, it was used exclusively for slurries and powders, making it difficult to supply corrosive materials. On the other hand, in the agitator described in this section, the improving material and/or air supply pipes are detachably attached to the outside of the rod portion, so that the pipes can be replaced as necessary. As a result, pipes with appropriate materials and pipe diameters can be selected in advance and replaced with such pipes at the construction site, so various types of improvement materials such as slurries, powders, corrosive materials, etc. is supplied, and an improvement in work efficiency is also expected.

In addition, in the agitator described in this section, when the piping is attached, the position of the outlet through which the improving material and/or air is discharged can be adjusted. That is, the position of the discharge port is adjusted to any position that supplies the improving material and/or air to the vicinity of the pair of stirring blades. It is adjusted to a position closer to the mounting portion than the blades, a position closer to the tip of the rod than the pair of stirring blades, or the like. Such adjustment of the position of the discharge port may be realized by adjusting the length of the pipe, adjusting the direction in which the pipe is extended, or the like. As a result, the improving material and air are discharged to appropriate positions according to conditions such as the quality of the ground. Furthermore, if the configuration is such that both the improvement material and air can be supplied, air will be supplied as needed in addition to the improvement material. Air is mixed and stirred. As a result, compared to the case where air is not agitated, the weight of the improved body to be formed is reduced and the internal pressure is reduced, so that the agitation efficiency is improved and the sludge is discharged smoothly. In addition, in the configuration where only air can be supplied, for example, when the stirrer is pulled out or rotated, there is a risk of a vacuum state if nothing is supplied from the piping. It is used when supplying.

(5) In items (3) and (4) above, a spiral tube having a straight tube shape with a guide plate spirally provided on the outer periphery and capable of axially rotating using the power supplied from the heavy machinery is attached to the tip of the tube. are directed toward the vicinity of the upper portion of the pair of stirring blades, and attached along at least a portion of the rod portion (Claim 3 ).
The agitator described in this section further includes a spiral tube, which has a straight tube shape with a spiral guide plate on its outer periphery, and can be axially rotated using power supplied from heavy machinery. It is. Such a spiral tube is attached along at least a portion of the rod portion with its tip directed toward the upper vicinity of the pair of stirring blades.

Here, when mixing and stirring in the ground while supplying improvement material such as cement slurry, the mixture corresponding to a part of the volume of the supplied improvement material (mixture of soil forming soil and improvement material) etc. , but there is a risk that the pressure due to the influence of the remaining volume pushes the ground laterally, displacing nearby structures and the like. Therefore, in the agitator described in this section, while the ground is mixed and agitated while the improvement material is being supplied, the spiral tube having the structure described above is placed on the side opposite to the tip of the rod portion (ground surface side) with the guide plate. Rotate the axis in the direction of rotation. As a result, the internal pressure, which has increased due to the supply of the improving material, is smoothly discharged from the vicinity above the stirring blades toward the ground surface, thereby suppressing the lateral displacement of nearby structures and the like.

(6) In items ( 3 ) to (5) above, the angle formed between each rotating shaft and the extending direction of the rod portion of the pair of stirring blades is inclined toward the tip end of the rod portion. are attached in opposite directions to each other with the rod part interposed therebetween, and are positioned directly below the lateral center of the tip of the rod part as the plurality of cutting blades. agitating device comprising a detachable tipped cutting blade for excavating and agitating (Claim 4 ).
In the stirring device described in this section, a pair of stirring blades are attached to the tip of the rod portion in opposite directions, and at this time, the rotation axis of each stirring blade and the extending direction of the rod portion are formed. It is attached in a slightly slanted state so that the angle at which it extends is smaller than 90° toward the tip of the rod. In other words, with respect to the direction parallel to the rotation axis, each of the stirring blades is slightly shifted so that the end opposite to the end attached to the rod is positioned closer to the tip of the rod. can be installed at an angle to the

Furthermore, in the stirring device described in this section, each of the pair of stirring blades has a detachable tip cutting blade as a plurality of cutting blades for excavating and stirring right under the lateral center of the tip of the rod part. contains. That is, if the stirring blades are not attached at an angle, if some of the cutting blades are attached so as to excavate directly below the lateral center of the tip of the rod part, when the stirring blades rotate, the cutting blades will be Because it interfered with the part, it was practically unusable. Therefore, by including the tip cutting blade as described above after the stirring blade is attached at an angle as described above, the tip cutting blade does not interfere with the rod portion, and the tip of the rod portion that could not be reached in the past directly below the lateral center of the will be excavated and agitated by the tip cutting edge. As a result, especially when the construction target is hard ground, the area immediately below the tip of the rod portion is efficiently excavated and stirred, and the occurrence of insufficient stirring is suppressed.

(7) In items ( 3 ) to (6) above, when the pair of stirring blades rotates, each of the two or more stirring blades rotates at different positions in a direction parallel to the rotation axis of the stirring blade. A stirrer comprising a plurality of protrusions detachably attached to the rod so as to protrude between the cutting blades (Claim 5 ).
The stirring device according to this section further includes a plurality of protrusions, and when the pair of stirring blades rotates, the plurality of protrusions are arranged on each of the stirring blades in a direction parallel to the rotation axis of the stirring blades. It is detachably attached to the rod portion so as to protrude between two or more cutting blades rotating at different positions. That is, each of the protrusions passes between the cutting blades and rotates around the stirring blade when viewed relatively from the rotating stirring blade. As a result, when agitating clayey ground in particular, it is possible to prevent the soil-forming soil from adhering between the cutting blades. Furthermore, the synergistic action of the cutting blade and the projecting portion improves the efficiency of agitating the ground.

(8) In items (1) to (7) above, an extension mechanism for extending the length from the attachment position of the rod portion to the tip by using the power supplied from the heavy equipment. A stirring device having a
The agitator described in this section further includes an extension mechanism, and this extension mechanism utilizes power supplied from the heavy machinery to extend the length of the rod portion from the attachment position of the attachment portion to the tip. is. Therefore, after excavating and agitating the ground without extending the rod, the ground is excavated and agitated again with the rod extended by the extension mechanism, thereby moving the heavy machinery and attaching the extension rod. However, the scope of construction will be expanded.

(9) The agitating device according to ( 3 ) to (8) above, wherein the heavy machine is a hydraulic excavator (Claim 6 ).
The agitator described in this section is mainly used for construction work targeting shallow ground because the heavy machine to which it is attached is a hydraulic excavator. It is suitable for on-site construction under various conditions.

(10) The agitating device according to ( 3 ) to (8) above, wherein the heavy machine is a leader-equipped hydraulic large-diameter drilling machine (Claim 7 ).
The agitation device described in this section is attached to a hydraulic large-diameter drilling machine with a leader. By using a rod part with a length corresponding to the maximum depth, construction at various depths can be handled. Furthermore, the leader of the leader-equipped hydraulic large-diameter drilling machine acts as a guide for the stirring device, which is expected to improve the accuracy of drilling in the vertical direction.

(11) A mechanical stirring method for improving the ground by using a stirring device that is attached to a working machine of a heavy machine and stirs the ground while supplying improving material and / or air, wherein the stirring device is a rod portion Then, while rotating using the power supplied from the heavy equipment, the ground is stirred by a plurality of cutting blades provided on the outer periphery, and the rotation axis is orthogonal or substantially orthogonal to the extending direction of the rod part. A pair of stirring blades attached to the tip of the rod part, and a bending mechanism that bends the rod part from the middle part to the tip using the power supplied from the heavy machine, The stirring device is attached to the work machine so that the tip of the rod portion faces downward in the front and the pair of stirring blades are positioned on the left and right sides in the lateral direction of the heavy machine. In some cases, the ground is stirred while avoiding the obstacles in a state in which the middle part to the tip of the rod part is bent toward the heavy equipment side with respect to the extending direction of the rod part by the bending mechanism. A mechanical stirring method characterized by:

(12) In the above item (11), the stirring device utilizes power supplied from the heavy machinery to rotate the rod with an axis parallel to the extending direction of the rod portion in a non-bending state as a rotation axis. at least up to a maximum of 90 degrees counterclockwise and clockwise respectively, wherein at least the axial end of the construction area located laterally of the heavy machine is operated. A mechanical agitation construction method in which the ground is agitated while the rod portion is axially rotated by a rotating mechanism.
(13) In the above item (12), the stirring device uses power supplied from the heavy machinery to rotate the pair of stirring blades. Each of the rotation drive units is provided with a rotation control mechanism capable of controlling the rotation direction, rotation speed and rotation torque of the stirring blade, and the rod portion is rotated by the shaft rotation mechanism. A mechanical stirring method for controlling each of the rotation control mechanisms so as to rotate the pair of stirring blades in a direction that assists the rotation of the shaft when the shaft is rotated (claim 8 ).
The mechanical stirring method according to items (11) to (13) is carried out using the stirring device according to items (1) to (3), respectively, so that the stirring according to items (1) to (3) is performed. It has the equivalent function corresponding to the device.

(14) In the above item ( 13 ), the rod is alternately rotated counterclockwise and clockwise by the axial rotation mechanism while the rod is bent or not bent by the bending mechanism. A mechanical stirring method for stirring the ground while rocking and changing the rotation direction and number of rotations of each of the pair of stirring blades by the rotation control mechanism (Claim 9 ).

In the mechanical stirring method described in this section, the ground is stirred by combining the operation control of the rod portion by the bending mechanism and the shaft rotation mechanism provided in the stirring device and the control of the stirring blade by the rotation control mechanism. Specifically, while the rod portion is bent or not bent by the bending mechanism, the rod portion is alternately rotated counterclockwise and clockwise by the shaft rotation mechanism, for example, 180° (counterclockwise 90° + The ground is stirred while rocking (clockwise 90°) and changing the rotation direction and rotation speed of each stirring blade by the rotation control mechanism. At this time, the presence or absence of bending of the rod part, the size of the bending angle, the size of the swing rotation angle of the rod part, the rotation direction and rotation speed of the stirring blade, etc. Arbitrarily set. As a result, the area of the ground to be agitated is increased without the need to change the position of the heavy equipment, thereby further improving work efficiency.

(15) In items (11) to (14) above, a pipe for supplying the improving material and/or air to the vicinity of the pair of stirring blades is provided along at least a part of the rod portion. A mechanical stirring method in which one or two pipes are attached detachably to the outside of the pipe and the position of the discharge port of the pipe can be adjusted.
(16) In items (11) to (15) above, a spiral tube having a straight tube shape with a guide plate spirally provided on the outer periphery and capable of axially rotating using the power supplied from the heavy machinery is provided. It is attached along at least a part of the rod part so that the tip faces near the upper part of the pair of stirring blades, and while the improving material is being supplied, the guide plate moves toward the opposite side of the tip of the rod part. A mechanical agitation construction method in which the ground is agitated while rotating the spiral tube in the direction of rotation.

(17) In items (11) to (16) above, the angle formed between the rotation axis of each of the pair of stirring blades of the stirring device and the extending direction of the rod portion is equal to the rod portion. In a state slightly inclined so as to be less than 90 ° toward the tip side of the, and attached in opposite directions to each other across the rod portion, each of the pair of stirring blades is provided with the plurality of cutting blades, A mechanical agitation construction method for detachably attaching a tip cutting blade for excavating and agitating right under the lateral center of the tip of the rod part.
(18) In items (11) to (17) above, when the pair of stirring blades rotates, each of the two or more stirring blades rotates at different positions in a direction parallel to the rotation axis of the stirring blade. A mechanical stirring construction method in which a plurality of projecting portions are detachably attached to the rod portion so as to project toward between the cutting blades.
Then, the mechanical stirring method described in items (15) to (18) is performed using the stirring apparatus described in items (4) to (7), respectively, to obtain items (4) to (7). Equivalent action corresponding to the agitator of .

Since the present invention is configured as described above, it is possible to suppress the frequency of movement of heavy machinery in the mechanical stirring method, and to improve work efficiency.

1 is a front view of a stirring device according to a first embodiment of the present invention; FIG. 1. It is a side view of the stirring apparatus of FIG. 1, (a) has shown the state in which the rod part is not bent, (b) has shown the state in which the rod part was bent. FIG. 3 is a schematic diagram showing an example of a pipe having a discharge port position different from that in FIG. 2 ; 1 is an image diagram of construction by a hydraulic excavator equipped with a stirring device according to a first embodiment of the present invention; FIG. 1 is a block diagram schematically showing a hydraulic control image of a hydraulic excavator equipped with a stirring device according to a first embodiment of the present invention; FIG. FIG. 5 is a side view showing a leader-equipped hydraulic large-diameter drilling machine equipped with a stirring device according to a second embodiment of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. Here, detailed description of the same or corresponding parts as in the prior art is omitted, and the same or corresponding parts are indicated by the same reference numerals throughout the drawings.
1 and 2 schematically show the configuration of a stirring device 10 according to a first embodiment of the invention. As illustrated, the stirring device 10 according to the first embodiment of the present invention 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 protrusions It includes section 34 , bending mechanism 40 , pivot mechanism 46 , spiral tube 52 and extension mechanism 58 . The rod portion 12 constitutes the main body portion of the stirring device 10 and has a hollow, substantially straight tubular shape, and various members are attached to the outside and inside thereof.

A pair of stirring blades 14 are attached to the tip of the rod portion 12, and in the example of FIG. They are mounted opposite to each other with the tip 12a of the rod 12 interposed therebetween. Each of the pair of stirring blades 14A and 14B is provided with a plurality of cutting blades 16 on its outer periphery, and is rotated by a rotation drive section 20, which will be described later. Further, the pair of stirring blades 14A and 14B are arranged so that each rotation shaft 18 is orthogonal or approximately orthogonal to the extending direction of the rod portion 12 (vertical direction in FIGS. 1 and 2). attached to the In the example of FIG. 1, the angle α formed between each rotating shaft 18 and the extending direction of the rod portion 12 is smaller than 90° toward the distal end side (lower side in the drawing) of the rod portion 12. It is in a slightly slanted state. For example, the angle α formed between the rotating shaft 18 and the extending direction of the rod portion 12 is about 5° smaller than 90°, although the angle α is not limited to this.

A plurality of tip cutting edges 17 are included in the plurality of cutting edges 16 provided on each of the pair of stirring blades 14A and 14B. These tip cutting blades 17 are for excavating and stirring right under the center of the lateral direction (horizontal direction in FIG. 1) of the tip portion 12a of the rod portion 12, and as can be confirmed in FIG. Among the plurality of cutting blades 16, it is provided at a position closest to the tip portion 12a in the direction parallel to the rotating shaft 18 of the blade 14. As shown in FIG. Also, the tip cutting blade 17 is arranged so that it does not interfere with the rod part 12 when it is in the upper position in FIG. It is provided at an appropriate angle and length so that the tip cutting edges 17 provided at 14 do not interfere with each other. Furthermore, these tip cutting blades 17 are detachably attached to each of the stirring blades 14, and can be attached and detached as required. In addition, in FIG. 1, the tip cutting edge 17 is included and the shape of the cutting edge 16 is simplified and illustrated.

The above-described rotary drive unit 20 is provided separately for each pair of stirring blades 14 so as to be incorporated in the stirring blades 14 at the tip of the rod portion 12. In this embodiment, one stirring blade 14A It is composed of a first stirring blade hydraulic motor 20A that rotates and a second stirring blade hydraulic motor 20B that rotates the other stirring blade 14B. The first stirring blade hydraulic motor 20A and the second stirring blade hydraulic motor 20B utilize power (oil pressure in this embodiment) supplied from a heavy machine 70 (see FIG. 4) to drive the pair of stirring blades 14A and 14B. , and hydraulic pressure is supplied through the inside of the rod portion 12 . Further, the first stirring blade hydraulic motor 20A and the second stirring blade hydraulic motor 20B are each provided with a rotation control mechanism 22, and the rotation direction and number of rotations of each stirring blade 14 are controlled by the rotation control mechanism 22. and rotational torque are controlled.

Furthermore, in the examples of FIGS. 1 and 2 , each of the rotary drive units 20 is provided with a rotation assist control unit 62 . When the rod portion 12 is axially rotated by the shaft rotation mechanism 46, which will be described later, these rotation assistance control portions 62 rotate the pair of stirring blades 14 in a direction that assists the rotation of the shaft. It controls each of the The specific content of this control will be described later together with the shaft rotation mechanism 46 . The rotation assist control unit 62 can be installed at any position as long as it can control the rotation control mechanism 22. may
With the configuration as described above, during construction using the stirring device 10, the pair of stirring blades 14 are rotated by the hydraulic motors 20A and 20B (rotation drive unit 20) controlled by the rotation control mechanism 22, and the stirring blades 14 are rotated. The ground G (see FIG. 4) is agitated by the plurality of cutting blades 16 rotating along the outer periphery. In addition, in FIG. 2, the plurality of cutting blades 16 that are rotationally moved are illustrated as circular shapes in a simplified manner.

Referring to FIG. 1, when the pair of stirring blades 14 rotates, the plurality of protrusions 34 rotate at different positions in each stirring blade 14 in a direction parallel to the rotation axis 18 of the stirring blade 14. It is attached to the rod portion 12 so as to protrude between the one or more cutting edges 16 . In the example of FIG. 1, when first checking from one stirring blade 14A, among the four cutting blades 16 illustrated on the upper side in the drawing of the outer circumference of the stirring blade 14A, between the three cutting blades 16 adjacent to the left side in the drawing Two projecting portions 34 are fixed to the rod portion 12 via a support member 36 so as to project toward each of the . Similarly, when checking the other stirring blade 14B, among the four cutting blades 16 illustrated on the upper side in the drawing of the outer circumference of the stirring blade 14B, each of the three cutting blades 16 adjacent to the right side in the drawing has Two projecting portions 34 are fixed to the rod portion 12 via a support member 36 so as to project toward the rod portion 12 . These protrusions 34 may be rod-shaped or plate-shaped, for example, and the material thereof may be highly rigid or flexible to some extent, such as a steel wire. Also, 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 can be attached and detached as necessary. . In addition, in FIG. 2, illustration of the plurality of projecting portions 34 and the support member 36 is omitted.

Referring to FIG. 2, the pipe 32 is for supplying a soil improvement material to the vicinity of the pair of stirring blades 14A and 14B. It is mounted on the direction rearward side (right side in FIG. 2). Furthermore, the pipe 32 is detachably attached to the rod portion 12 along a portion of the rod portion 12 . Although not shown in FIG. 2 for the sake of convenience, any method for attaching the pipe 32 can be adopted as long as it can be attached to and detached from the rod portion 12 . In addition, in FIG. 2, only a part of the pipe 32 along the rod portion 12 is shown up to one end (the lower end in the drawing) that serves as a discharge port 32a of the improving material. , the other end of the pipe 32 extends to a supply source of the improving material installed in the heavy equipment 70 or its vicinity.

Here, the pipe 32 has a discharge port 32a that discharges the improving material, so that the position of the discharge port 32a can be adjusted. For example, FIG. is illustrated. In addition, in FIG. 3, illustration of the stirring blade 14 is omitted, and the rod portion 12 is illustrated in a simplified manner. The pipe 32 shown in FIG. 3 extends along the distal end portion 12a of the rod portion 12 with the portion that was the discharge port 32a in the example of FIG. It is located on the lower side of 12a in the figure. A portion of the pipe 32 is covered with a steel cover 38, for example. In addition, the position of the pipe 32 is arbitrary as long as it is attached along a part of the rod portion 12. left side). Further, a part of the pipe 32 may be made of a flexible material in order to accommodate bending of the rod portion 12 by the bending mechanism 40, which will be described later.

Returning to FIG. 2, the air pipe 33 is for supplying air (air) to the vicinity of the pair of stirring blades 14A and 14B. In the example of FIG. It is mounted on the right side in FIG. Like the pipe 32, the air pipe 33 is detachably attached to the rod portion 12 along a part of the rod portion 12, and is attached to the rod portion 12 in a detachable manner. Any method can be adopted. In FIG. 2, only a portion of the air pipe 33 along the rod portion 12 is shown up to one end (lower end in the drawing) that serves as an air discharge port 33a. , the other end of the air pipe 33 extends to an air supply source installed in the heavy equipment 70 or its vicinity. Further, the position of the discharge port 33a of the air pipe 33 can be adjusted similarly to the pipe 32, and the position of the discharge port 33a can be 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 the side side (left or right side in FIG. 1) or the front side (FIG. 2) of the rod portion 12 left side). Further, a part of the air pipe 33 may be made of a flexible material in order to accommodate bending of the rod portion 12 by the bending mechanism 40, which will be described later.
The stirring device 10 of the present embodiment has one pipe 32 for supplying the improving material and one pipe 33 for supplying air. Alternatively, two pipes 32 or two air pipes 33 may be provided. Furthermore, the configuration may be such that there is a pipe for merging and supplying the improving material and the air at the same time, or two such pipes may be provided. Alternatively, a configuration may be adopted in which a pipe for simultaneously supplying the improving material and air and either one of the pipe 32 and the pipe 33 are provided at the same time.

Returning to FIGS. 1 and 2, the spiral tube 52 has a straight tube shape with a helical guide plate 54 provided on the outer periphery, and the tip on the lower side in FIGS. In this embodiment, it is attached along the rod portion 12 on the front side (left side in FIG. 2) of the rod portion 12 so as to reach the vicinity of the upper portion of 14B in the drawing. Further, the spiral tube 52 is adapted to be axially rotated using power (hydraulic pressure in this embodiment) supplied from the heavy equipment 70, and in this embodiment, the upper end side of the spiral tube 52 in the drawing is held. The shaft is rotated by a hydraulic spiral tube shaft rotating motor 56 installed as shown in FIG. The method of axially rotating the spiral tube 52 and the method of attaching it to the rod portion 12 so as to be axially rotatable are not limited to the present embodiment, and other methods may be used.

The bending mechanism 40 uses power (hydraulic pressure in this embodiment) supplied from the heavy equipment 70 to bend the rod portion 12 from its middle portion to its tip. In this embodiment, as shown in FIG. 2(a), the bending mechanism 40 includes a rod bending cylinder 42 installed inside the rod portion 12 and an intermediate portion of the rod portion 12, which is located above the rod portion 12 in the drawing. and a pin 44 pinned to the lower portion. In the state shown in FIG. 2A, the rod bending cylinder 42 is extended and the rod portion 12 is straightened. On the other hand, as shown in FIG. 2B, the retraction of the rod bending cylinder 42 causes the portion of the rod portion 12 from the pin connection portion to the tip to rotate slightly around the pin 44, thereby causing the rod portion 12 to rotate. It shows a state bent to the right in the drawing with respect to the extending direction (the vertical direction in the drawing). In addition, in FIG. 2B, illustration of the rod bending cylinder 42 and the pin 44 is omitted for the sake of convenience. Further, the bending mechanism 40 is not limited to the configuration including the rod bending cylinder 42 and the pin 44, and may have another configuration.

The shaft rotation mechanism 46 uses power (hydraulic pressure in this embodiment) supplied from the heavy equipment 70 to rotate an axis parallel to the extending direction (vertical direction in the drawing) of the rod portion 12 in the non-bending state. , the rod portion 12 is axially rotated counterclockwise and clockwise, respectively. In this embodiment, as shown in FIG. 1, the shaft rotation mechanism 46 includes a first rod-rotating cylinder 48 and a second rod-rotating cylinder 48 which are arranged on both sides of the rod portion 12 in the lateral direction (horizontal direction in the drawing). 50. The first rod rotating cylinder 48 and the second rod rotating cylinder 50 are configured to rotate the rod portion 12 and the mounting portion 30 so as to axially rotate the rod portion 12 with respect to the mounting portion 30 by combining these expansion and contraction operations. Both sides are connected.

1 and 2 show a reference state in which the rod portion 12 is not axially rotated. In this embodiment, the rod portion 12 is axially rotated by a maximum of 90 degrees in each of the counterclockwise direction and the clockwise direction. Note that 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 first rod rotation cylinder 48 and the second rod rotation cylinder 50, and may have another configuration.

Here, a method for assisting the axial rotation of the rod portion 12 by the rotation assisting control section 62 will be described. As described above, the rotation assistance control unit 62 performs rotation control so that the pair of stirring blades 14 are rotated in a direction that assists the rotation of the rod portion 12 when the rod portion 12 is rotated by the shaft rotation mechanism 46. It controls the mechanism 22 . For example, when the rod portion 12 is rotated clockwise in plan view by the shaft rotation mechanism 46, the auxiliary rotation control portion 62 rotates one stirring blade 14A counterclockwise when viewed from the left side in FIG. Each of the rotation control mechanisms 22 is controlled so that the stirring blade 14B of is rotated counterclockwise when viewed from the right side in FIG. Further, when the rod portion 12 is rotated counterclockwise in plan view by the shaft rotation mechanism 46, the rotation auxiliary control portion 62 rotates one stirring blade 14A clockwise as viewed from the left side in FIG. Each of the rotation control mechanisms 22 is controlled so that the stirring blade 14B of is rotated clockwise when viewed from the right side in FIG. In any of these cases, the pair of stirring blades 14A and 14B are rotated in opposite directions when viewed from the same direction. It should be noted that a configuration without such a rotation assist control unit 62 may be used. Each of the rotation control mechanisms 22 may be controlled so as to rotate the pair of stirring blades 14A and 14B in the directions as described above for assisting 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 using power (hydraulic pressure in this embodiment) supplied from the heavy machine 70. 2) includes a rod extension cylinder 60 located on the left side of FIG. The rod extension cylinder 60 is connected to both the rod portion 12 and the mounting portion 30 so as to extend the length of the rod portion 12 from the mounting portion 30 to the tip by its retraction 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. The rod portion 12 is adapted to extend by the amount. The configuration of the extension mechanism 58 is not limited to the configuration of this embodiment, and may be of another configuration.

On the other hand, the attachment portion 30 is for attaching the rod portion 12 configured as described above to the working machine 72 of the hydraulic excavator 70A as the heavy machine 70 in the present embodiment, 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 70A (left side in the drawing), and the pair of stirring blades 14A and 14B are arranged on the left side in the lateral direction of the hydraulic excavator 70A. The rod part 12 is attached to the working machine 72 so as to be positioned on the right side (back side and front side in the direction perpendicular to the plane of the paper). 1 and 2, the mounting portion 30 supports the rod portion 12 so as to be axially rotatable by an axial rotation mechanism 46 and extendable by an extension mechanism 58. As shown in FIG.

With reference to FIGS. 1 to 4, the stirring device 10 according to the first embodiment of the present invention having the configuration described above is attached to a hydraulic excavator 70A as shown in FIG. works like That is, the ground G is excavated by the pair of stirring blades 14A and 14B rotated by the rotation drive unit 20, and the improvement material supplied from the pipe 32, the air supplied from the air pipe 33, and the ground G Forming soil is mixed and agitated. At this time, the position to be excavated and stirred by the pair of stirring blades 14A, 14B is controlled by operating the work machine 72 of the hydraulic excavator 70A, and the rotation direction, rotation speed, rotation torque, etc. of the pair of stirring blades 14A, 14B are controlled. , is controlled by the rotation control mechanism 22 . In addition, along with the supply of the improving material from the pipe 32, the spiral tube 52 is axially rotated by the spiral tube shaft rotating motor 56 in the direction in which the guide plate 54 provided on the outer periphery of the spiral tube 52 rotates upward in the figure. be done.

Further, if necessary, the bending mechanism 40 bends the rod portion 12 toward the hydraulic excavator 70A, the axial rotation mechanism 46 rotates the rod portion 12, and/or the extension mechanism 58 extends the rod portion 12. will be At this time, the bending 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. In addition, as the improving material used during construction, an appropriate improving material is selected according to the construction conditions from slurry such as cement slurry, powder such as cement, or corrosive materials. Furthermore, from among a plurality of pipes 32 having various materials and pipe diameters, a pipe 32 made of a material suitable for supplying the selected improving material and having a pipe diameter suitable for the construction conditions is selected, It is attached to the rod portion 12 and used.

Here, the first stirring blade hydraulic motor 20A and the second stirring blade hydraulic motor 20B that constitute the rotary drive unit 20, the rod bending cylinder 42 that constitutes the bending mechanism 40, and the rod rotating mechanism that constitutes the shaft rotation mechanism 46 The first cylinder 48, the second rod rotating cylinder 50, the rod extending cylinder 60 constituting the extending mechanism 58, and the spiral tube axis rotating motor 56 are all supplied from the heavy equipment 70 as described above. It is hydraulically driven. FIG. 5 schematically shows a hydraulic control image of a hydraulic excavator 70A as a heavy machine 70 equipped with the stirring device 10. As shown in FIG. As illustrated, the hydraulic excavator 70A has a hydraulic pressure switching control section 80, and the hydraulic pressure switching control section 80 controls the supply destination and supply amount of the hydraulic pressure.

Hydraulic pressure is supplied to the first stirring blade hydraulic motor 20A, the second stirring blade hydraulic motor 20B, the rod bending cylinder 42, the rod rotating first cylinder 48, the rod rotating second cylinder 50, the rod In addition to the extension cylinder 60 and the spiral tube shaft rotation motor 56, a hydraulic excavator drive system 82 is included. The hydraulic excavator drive system 82 represents a drive part that the heavy machine 70 originally has, and includes hydraulic actuators for operating the work machine 72, rotating the crawler, and turning the machine. The hydraulic pressure switching control unit 80 is controlled in response to an operation from the operator room 74 (see FIG. 4) of the heavy equipment 70, and includes the operation of each drive unit included in the hydraulic excavator drive system 82, including the extension of the rod portion 12, the shaft All operations of rotation, bending, rotation of the pair of stirring blades 14 and axial rotation of the spiral tube 52 are performed from the operator room 74 .

Now, according to the first embodiment of the present invention having the above configuration, it is possible to obtain the following effects. That is, as shown in FIGS. 1 and 2, the stirring device 10 according to the first embodiment of the present invention includes a rod portion 12 and a pair of stirring blades 14 (14A) attached to the tip of the rod portion 12. , 14B) and an attachment portion 30 for attaching the rod portion 12 to a working machine 72 (see FIG. 4) of the heavy equipment 70. As shown in FIG. Each of the pair of stirring blades 14A and 14B is rotated by power supplied from the heavy equipment 70, and stirs the ground G (see FIG. 4) with a plurality of cutting blades 16 provided on the outer circumference while rotating.

Also, the pair of stirring blades 14A and 14B are attached to the tip of the rod portion 12 so that the respective rotating shafts 18 are orthogonal or substantially orthogonal to the extending direction of the rod portion 12. As shown in FIG. As a result, the plurality of cutting blades 16 rotating along the outer periphery of the stirring blade 14 are directed in the direction in which the tip of the rod portion 12 is directed. Further, as can be seen in FIG. 4, the rod portion 12 has a front end of the rod portion 12 facing downward in front of the heavy machinery 70, and a pair of stirring blades 14 located on the left and right sides of the heavy machinery 70. , it is attached to the work machine 72 by the attachment portion 30. As shown in FIG. For this reason, the plurality of cutting blades 16 of the stirring blades 14 are mainly used downward, and while the ground G is excavated by such a pair of stirring blades 14, the ground forming soil, the improvement material and/or the air are mixed and stirred.

Further, the stirrer 10 according to the first embodiment of the present invention includes a bending mechanism 40 including a rod bending cylinder 42, as shown in FIG. The bending mechanism 40 utilizes the power supplied from the heavy machinery 70 to bend the rod portion 12 from the middle portion to the tip as shown in FIG. It is bent to the 70 side (right side in FIG. 2). As a result, the tip of the rod portion 12 is oriented not only in the extending direction of the rod portion 12 but also in the direction of the heavy machinery 70 side where the rod portion 12 is bent. The direction of stirring can be switched. In particular, even when obstacles such as pipes are present in the ground G, it is possible to agitate the area below the obstacles while avoiding the obstacles with the bent rod portion 12 without moving the heavy equipment 70 . Therefore, it is possible to reduce the frequency of movement of the heavy machinery 70 during construction, and to improve work efficiency.

As shown in FIGS. 1 and 2, the stirring device 10 according to the first embodiment of the present invention further includes a shaft rotation mechanism including a rod rotation first cylinder 48 and a rod rotation second cylinder 50. 46. The shaft rotation mechanism 46 uses the power supplied from the heavy equipment 70 to rotate the rod portion 12 about an axis parallel to the extending direction of the rod portion 12 in the non-bent state. . The axial rotation of the rod portion 12 by the axial rotation mechanism 46 is at least 90° at maximum in each of the counterclockwise direction and the clockwise direction, that is, at least 180° with respect to the front direction of the working machine 72 (left direction in FIG. 2). is rotated within the range of

Here, referring to FIG. 4, when improving the ground G using the stirring device 10, in order to planarly form the end of the construction range (improved body), the mounting direction of the stirring blade 14 is Considering , it is usually necessary to arrange the heavy equipment 70 in an orientation substantially orthogonal to the plane of the improved body. However, in the agitating device 10 according to the first embodiment of the present invention, as described above, the rod portion 12 is rotated by the axial rotation mechanism 46, so that the front direction of the heavy machine 70 or the opposite direction of the construction range is It corresponds not only to the planar end located in the front direction (horizontal direction in the figure), but also to the planar end located in the side direction of the heavy machine 70 (direction perpendicular to the paper surface in FIG. 4). be able to. As a result, it is possible to construct planar end portions located in various directions of the construction range without moving the heavy machinery 70. This also reduces the frequency of movement of the heavy machinery 70, resulting in work efficiency. can be further improved. Furthermore, when the ground G is stirred at the timing of finishing construction, for example, other than the timing of constructing the planar end of the construction range, the rod portion 12 is rotated counterclockwise and clockwise by the shaft rotation mechanism 46. Alternate shaft rotation may be used to oscillate. By doing so, compared to the case where the rod part 12 is not swung, the range to be agitated when the tip of the rod part 12 is moved along the same trajectory is widened, so that the construction efficiency can be improved.

Further, in the stirring device 10 according to the first embodiment of the present invention, as shown in FIG. Each of the stirring blades 14 is separately provided at the tip of the portion 12, and each rotation driving portion 20 is provided with a rotation control mechanism 22 capable of controlling the rotation direction, the number of rotations, and the rotation torque of the stirring blades 14. be. As a result, for example, when a pair of stirring blades 14 are rotated in the same direction, the stirring blades 14 may advance in an unintended direction due to the force resisting the rotation, resulting in insufficient stirring at some point. By rotating the stirring blades 14 in opposite directions to each other, the force resisting the rotation of the stirring blades 14 is canceled and the advancing direction of the stirring blades 14 is stabilized, so that the occurrence of insufficient stirring can be suppressed. Furthermore, even if the stirring blade 14 moves in an unintended direction, the direction can be easily corrected by rotating the stirring blade 14 in the opposite direction, so that the loss of construction time can be reduced. Also, by controlling the rotational torque, etc., it is possible to control the tip load with respect to the pushing force into the ground G, so it is possible to suppress the occurrence of hole bending and the resulting insufficient stirring.

In addition, in the stirring device 10 according to the first embodiment of the present invention, when the rod portion 12 is axially rotated by the shaft rotation mechanism 46, the pair of stirring blades 14 are rotated in a direction to assist the axial rotation. It includes a rotation assist control section 62 that controls each of the rotation control mechanisms 22 so as to allow them to rotate. Here, the rotation directions of the pair of stirring blades 14 controlled by the rotation assistance control section 62 are usually opposite to each other. As a result, in particular, when the rod portion 12 is axially rotated by swinging as described above, by switching the rotation direction of the pair of stirring blades 14 in accordance with the direction of the axial rotation, the rod portion 12 can be rotated. Since the rotation of the shaft and the switching of the rotation direction of the shaft can be performed smoothly, work efficiency can be improved.

Furthermore, the stirring device 10 according to the first embodiment of the present invention, as shown in FIG. and an air pipe 33 for supplying air to the vicinity of the pair of stirring blades 14A and 14B are detachably attached to the outside of the rod portion 12 along at least a portion of the rod portion 12. It can be attached. Here, many of the conventional stirring devices have a pipe for supplying the improving material installed inside the rod part, and did not correspond to the replacement of the pipe, etc. could only supply In particular, since conventional piping was made of steel, it was used exclusively for slurries and powders, making it difficult to supply corrosive materials. In contrast, in the stirring device 10 according to the first embodiment of the present invention, the pipe 32 for supplying the improving material is detachably attached to the outside of the rod portion 12, so that the pipe 32 can be replaced as necessary. It can be performed. As a result, it is possible to select in advance a pipe 32 having an appropriate material and pipe diameter, or to replace the pipe 32 with such a pipe 32 at the construction site. It is possible to supply improved materials, and further, improvement of work efficiency can be expected.

In addition, in the stirring device 10 according to the first embodiment of the present invention, when the pipe 32 and the air pipe 33 are attached, the positions of the discharge ports 32a and 33a through which the improving material and/or air are discharged are adjusted. It is possible. That is, the positions of the discharge ports 32a and 33a are adjusted to any position that supplies the improving material and/or air to the vicinity of the pair of stirring blades 14. For example, the direction parallel to the extending direction of the rod portion 12 Regarding, as shown in FIG. 2, the position on the mounting part 30 side (upper side in the figure) than the pair of stirring blades 14, and as shown in FIG. side). As a result, it becomes possible to discharge the improving material and air to an appropriate position according to the situation such as the quality of the ground G. Furthermore, by being able to supply both the improvement material and air, it is possible to supply air as needed in addition to the improvement material. can be mixed and stirred. As a result, compared to the case where air is not agitated, the weight of the improved body to be formed is lighter and the internal pressure is reduced, so that the agitation efficiency can be improved and the mud can be discharged smoothly. becomes.

1 and 2, the stirring device 10 according to the first embodiment of the present invention further includes a spiral tube 52. The spiral tube 52 has a helical guide plate 54 on its outer periphery. It has a straight tube shape and can be rotated by a spiral tube shaft rotating motor 56 using power supplied from the heavy equipment 70 . Such a spiral tube 52 is attached along at least a portion of the rod portion 12 with its tip facing upward and near the pair of stirring blades 14A and 14B. Here, when mixing and stirring in the ground G while supplying an improvement material such as cement slurry, a mixture (mixture of ground formation soil and improvement material) etc. corresponding to a part of the volume of the supplied improvement material is discharged to the ground surface, but the pressure due to the effect of the remaining volume pushes the ground G laterally, which may displace adjacent structures. Therefore, in the agitating device 10 according to the first embodiment of the present invention, the spiral tube 52 having the above-described structure is installed while the ground G is being mixed and agitated while the improving material is being supplied. Rotate the axis in the direction to rotate toward the opposite side (earth surface side) of the tip of 12. As a result, the internal pressure, which has increased due to the supply of the improving material, can be smoothly discharged from the vicinity above the stirring blade 14 toward the ground surface, making it possible to suppress lateral displacement of adjacent structures.

Furthermore, in the stirring device 10 according to the first embodiment of the present invention, a pair of stirring blades 14A and 14B are attached to the tip of the rod portion 12 in opposite directions. At this time, as can be confirmed in FIG. 1, the angle α formed between the rotating shaft 18 of each stirring blade 14 and the extending direction of the rod portion 12 is the tip side of the rod portion 12 (lower side in the figure). ) with a slight inclination of less than 90°. In other words, each of the stirring blades 14A and 14B has an end opposite to the end attached to the tip 12a of the rod 12 in the direction parallel to the rotating shaft 18. It is installed with a slight inclination so that it is located near the tip of the Further, each of the pair of stirring blades 14A and 14B includes a detachable tip cutting edge 17 as a plurality of cutting edges 16 for excavating and stirring right under the lateral center of the tip of the rod portion 12. .

That is, when the stirring blade 14 is not attached at an angle, if a part of the cutting blade 16 is attached so as to excavate directly below the lateral center of the tip of the rod portion 12, when the stirring blade 14 rotates, Since the cutting edge 16 would interfere with the rod part 12, it could not be used substantially. Therefore, by attaching the stirring blade 14 at an angle as described above and including the tip cutting blade 17 as described above, the tip cutting blade 17 does not interfere with the rod portion 12 and does not reach conventionally. The tip cutting edge 17 can excavate and agitate the area immediately below the lateral center of the tip of the rod portion 12 . As a result, even if the construction target is hard ground, the pushing force effectively acts to efficiently excavate and stir the area immediately below the tip of the rod portion 12, and it is possible to suppress the occurrence of insufficient stirring. Become.

Further, the stirring device 10 according to the first embodiment of the present invention further includes a plurality of projecting portions 34, and the plurality of projecting portions 34 are arranged to move the stirring blades 14 when the pair of stirring blades 14 rotate. One that is detachably attached to the rod portion 12 so as to protrude between two or more cutting blades 16, each rotating at a different position in a direction parallel to the rotating shaft 18 of the stirring blade 14. is. That is, each of the protrusions 34 passes between the cutting blades 16 and rotates around the stirring blade 14 when viewed relatively from the rotating stirring blade 14 . As a result, it is possible to prevent soil-forming soil from adhering between the cutting blades 16, particularly when the clayey ground G is stirred. Furthermore, the synergistic action of the cutting blade 16 and the projecting portion 34 can improve the stirring efficiency of the ground G.

The stirring device 10 according to the first embodiment of the present invention further includes an extension mechanism 58 having a rod extension cylinder 60. The extension mechanism 58 uses power supplied from the heavy equipment 70 to , of the rod portion 12 from the mounting position by the mounting portion 30 to the tip thereof. For this reason, as shown in FIG. 4, after excavating and stirring the ground G without extending the rod portion 12 (see fine hatching in FIG. 4), the extension mechanism 58 extends the rod portion 12 again. By excavating and stirring the ground G (see the coarsely hatched portion in FIG. 4), the construction range can be expanded without moving the heavy equipment 70 or installing an extension rod.
Moreover, since the heavy equipment 70 to which the agitating device 10 according to the first embodiment of the present invention is attached is the hydraulic excavator 70A, it can be used mainly for the shallow ground G. In addition, since the hydraulic excavator 70A can turn in a small radius, it is possible to cope with construction work on site under various conditions.

Next, FIG. 6 shows a stirring device 10' according to a second embodiment of the present invention. Regarding the stirring device 10' according to the second embodiment of the present invention, only differences from the stirring device 10 according to the first embodiment of the present invention will be described, and the first embodiment of the present invention will be described. Descriptions of the configurations and effects of the same portions as those of the stirring device 10 according to the embodiment are omitted.
As shown in the figure, a stirring device 10' according to the second embodiment of the present invention is used by being attached to a leader-equipped hydraulic large-diameter drilling machine 70B as a heavy machine 70. As shown in FIG. At this time, the stirring device 10' is attached so as to move vertically along the leader 76 of the working machine 72 of the leader-equipped hydraulic large-diameter drilling machine 70B. Further, although a detailed description is omitted, the stirring device 10' includes a pair of stirring blades 14 whose rotation is individually controlled, a detachable discharge port 32a, and a discharge port 32a, similar to the stirring device 10 according to the first embodiment of the present invention. A pipe 32 whose position can be adjusted, an air pipe 33 which is detachable and whose position of the discharge port 33a can be adjusted, a plurality of projecting portions 34, a bending mechanism 40 for bending the rod portion 12, and an axial rotation of the rod portion 12 and a spiral tube 52 that can rotate about the axis. In addition, it is preferable that the rod portion 12 has a length corresponding to the maximum depth of the construction range.

As described above, the agitating device 10' according to the second embodiment of the present invention uses the leader-equipped hydraulic large-diameter drilling machine 70B as the heavy machine 70 to which it is attached. Construction at various depths can be handled by using the rod part 12 having a length corresponding to the maximum depth without selecting the rod length or attaching/detaching the extension rod. Furthermore, since the leader 76 of the leader-equipped hydraulic large-diameter drilling machine 70B acts as a guide for the agitating device 10', an improvement in the accuracy of vertical drilling can be expected.
On the other hand, the mechanical stirring method according to the embodiment of the present invention is performed using the stirring devices 10 and 10' according to the first and second embodiments of the present invention as described above, so that the stirring device Equivalent effects corresponding to 10 and 10' can be exhibited.

In particular, the mechanical stirring method according to the embodiment of the present invention controls the operation of the rod portion 12 by the bending mechanism 40 and the shaft rotation mechanism 46 provided in the stirring devices 10 and 10', and the control of the stirring blade 14 by the rotation control mechanism 22. can be combined to agitate the ground G by various methods. Specifically, for example, while the rod portion 12 is bent or not bent by the bending mechanism 40, the shaft rotation mechanism 46 alternately rotates the rod portion 12 counterclockwise and clockwise, for example, 180°. The ground G is agitated while rocking (90° counterclockwise + 90° clockwise) and while changing the rotation direction and number of rotations of each of the agitating blades 14 by the rotation control mechanism 22 . At this time, the presence or absence of bending of the rod portion 12, the magnitude of the bending angle, the magnitude of the rocking rotation angle of the rod portion 12, the rotation direction and rotation speed of the stirring blade 14, etc. It can be arbitrarily set according to the situation. As a result, the range of the ground G to be agitated is increased without the need to change the position of the heavy machine 70, so that the work efficiency can be further improved.

10, 10': stirring device, 12: rod portion, 14 (14A, 14B): pair of stirring blades, 16: cutting blade, 17: tip cutting blade, 18: rotating shaft, 30: mounting portion, 32: piping, 32a: discharge port, 33: air pipe, 33a: discharge port, 34: protrusion, 40: refraction mechanism, 46: shaft rotation mechanism, 52: spiral tube, 54: guide plate, 62: rotation auxiliary control unit, 70: Heavy equipment, 70A: hydraulic excavator, 70B: hydraulic large-diameter drilling machine with leader, 72: work machine, G: ground

Claims (9)

A stirring device that is attached to a working machine of a heavy machine and stirs the ground while supplying improving material and / or air,
a rod portion;
While rotating using the power supplied from the heavy equipment, the ground is stirred by a plurality of cutting blades provided on the outer periphery, and the rotation axis is orthogonal or substantially orthogonal to the extending direction of the rod part. a pair of stirring blades attached to the tip of the rod;
An attachment portion for attaching the rod portion to the work machine so that the tip of the rod portion faces downward in front of the heavy machinery and the pair of stirring blades are positioned on the left and right sides in the lateral direction of the heavy machinery. and including
A bending mechanism for bending the middle part to the tip of the rod part toward the heavy machine side with respect to the extending direction of the rod part by using the power supplied from the heavy machine ,
Using the power supplied from the heavy machine, the rod part is rotated counterclockwise and clockwise by at least a maximum of 90 degrees, with an axis parallel to the extending direction of the rod part in the non-bending state as a rotation axis. Equipped with an axis rotation mechanism for rotating the axis,
A rotary drive unit for rotating the pair of stirring blades using the power supplied from the heavy equipment is separately provided for each stirring blade at the tip of the rod portion, and each of the rotary drive units includes: A rotation control mechanism capable of controlling the rotation direction, rotation speed and rotation torque of the stirring blade is provided,
a rotation assist control unit for controlling each of the rotation control mechanisms so as to rotate the pair of stirring blades in a direction that assists the rotation of the rod when the rod is rotated by the rotation mechanism; A stirring device characterized by: A pipe for supplying the improving material and/or the air to the vicinity of the pair of stirring blades is detachably attached to the outside of the rod along at least a part of the rod, and the pipe discharges. 2. The agitator according to claim 1 , wherein one or two outlets are attached so that the position of the outlet can be adjusted. A spiral tube having a spiral guide plate on its outer periphery and being axially rotatable by using the power supplied from the heavy equipment directs its tip to the vicinity above the pair of stirring blades. 3. A stirrer according to claim 1 or 2 , characterized in that it is mounted along at least part of said rod portion. The pair of stirring blades is slightly inclined so that the angle formed between each rotating shaft and the extending direction of the rod portion is less than 90° toward the tip side of the rod portion. detachable tip cutting blades for excavating and agitating just below the lateral center of the tip of the rod portion as the plurality of cutting blades. 4. A stirring device according to any one of claims 1 to 3 , characterized in that it comprises a so that when the pair of stirring blades rotates, each of the stirring blades projects between the two or more cutting blades rotating at different positions in a direction parallel to the rotation axis of the stirring blades. 5. The stirring device according to any one of claims 1 to 4 , comprising a plurality of protrusions detachably attached to the rod portion. 6. The agitator according to any one of claims 1 to 5 , wherein said heavy machine is a hydraulic excavator. 6. The agitator according to any one of claims 1 to 5 , wherein the heavy machine is a leader-equipped hydraulic large-diameter drilling machine. A mechanical stirring method for improving the ground by using a stirring device that is attached to a working machine of a heavy machine and stirs the ground while supplying an improving material and / or air,
The stirring device stirs the ground with a plurality of cutting blades provided on the outer periphery while rotating using the rod and the power supplied from the heavy machine, and the rotation axis is the extending direction of the rod. A pair of stirring blades attached to the tip of the rod part so as to be orthogonal or substantially orthogonal to the above, and a bending mechanism that bends the rod part from the middle part to the tip using the power supplied from the heavy machine , including
Attaching the stirring device to the work machine so that the tip of the rod portion faces downward in front of the heavy machine and the pair of stirring blades are positioned on the left and right sides in the lateral direction of the heavy machine,
When there is an obstacle in the ground, the bending mechanism bends the rod portion from the middle portion to the tip thereof toward the heavy machinery side with respect to the extending direction of the rod portion, and the obstacle is removed. Stir the ground while avoiding
The stirring device uses the power supplied from the heavy machinery to rotate the rod portion counterclockwise and clockwise, respectively, about an axis parallel to the extending direction of the rod portion in a non-bent state. including an axial rotation mechanism for axial rotation of at least up to 90°;
At least, when constructing the end portion of the construction area located in the lateral direction of the heavy machine, the ground is stirred while the rod portion is axially rotated by the axial rotation mechanism,
The stirring device utilizes the power supplied from the heavy machinery to provide a rotation drive unit for rotating the pair of stirring blades separately at the tip of the rod portion for each stirring blade, and the rotation drive Each of the parts is equipped with a rotation control mechanism capable of controlling the rotation direction, rotation speed and rotation torque of the stirring blade,
A mechanical stirrer characterized by controlling each of the rotation control mechanisms so as to rotate the pair of stirring blades in a direction that assists the shaft rotation when the rod portion is rotated by the shaft rotation mechanism. Construction method. While the rod portion is flexed or not flexed by the bending mechanism, the rod portion is alternately rotated counterclockwise and clockwise by the shaft rotation mechanism to oscillate, and the rotation control is performed. 9. The mechanical stirring method according to claim 8 , wherein the ground is stirred while changing the rotating direction and rotating speed of each of the pair of stirring blades by means of a mechanism.

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