JPH08260504A - Stirring apparatus of foundation improving machine - Google Patents

Abstract

PURPOSE: To improve workability by forming a main body installed with blades of an impeller for soil stirring provided inside of a bucket cylindrical and installing hydraulic motor with a reduction gears inside of the main body. CONSTITUTION: A main body 11 of an impeller 10 for stirring is formed cylindrical and a flange part 15 is formed on an inner cylindrical surface part of the main body 11. Thereafter, a cylindrical part 13 projected inside of the main body 11 from a part of a side plate 6L of a bucket 5a is formed, and a flange part 14 is formed on a head end part of the cylindrical part 13. Additionally, a motor part 16 of a hydraulic motor 8 with a reduction gears is fixed on the flange part 14 by tightening a bolt 17, and a flange part 19 of a rotating drum 18 on the side furnished with reduction structure is fixed on the flange part 15 by tightening a bolt 20. Thereafter, when the hydraulic motor 8 with the reduction gears is operated to rotate, as the motor part 16 of the hydraulic motor 8 is fixed on the side of the side plate 6L of the bucket 5a, the rotating drum 18 on the side furnished with reduction structure is rotated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stirrer of a ground improvement machine for improving the ground by mixing a ground improvement agent such as a cement agent or a lime agent with soil and stirring the mixture.

[0002]

2. Description of the Related Art FIG. 14 is a front view of a stirring bucket described in JP-A-6-146324. FIG.
In the stirring bucket shown in FIG. 4, the mixing blade 2 is rotatably supported between the both side surfaces 1a and 1b in the bucket body 1, and the mixing blade 2 provided inside the rotating shaft 2a of the mixing blade 2 is directly rotated. The hydraulic motor 3 for causing the hydraulic motor 3 and the hydraulic circuit 4 of the hydraulic motor 3 are provided in the bucket body.

[0003]

As shown in FIG. 14, in one embodiment of the prior art stirring bucket, since the hydraulic motor is attached to the inside of the bucket body in an exposed state, rocks and the like mixed in the soil to be stirred are directly attached. It collided with the hydraulic motor and was not well maintained. Further, since the hydraulic motor is attached only to the side plate on one side of the bucket, it is impossible to obtain a sufficient stirring driving force. Also, because the soil scooped from the opening of the bucket is released only from that opening,
Depending on the condition of the soil (whether the soil is free-flowing, mud-like, or clumpy), the agitation was not sufficiently performed. Further, since the bucket having the stirring means inside is attached to the tip of the work attachment, the original excavation cannot be performed with the bucket, which may result in poor workability for ground improvement work. An object of the present invention is to provide a stirring device for a ground improvement machine that can solve the above problems.

[0004]

According to the present invention, there is provided a stirrer in which an impeller for stirring and mixing soil is provided inside a bucket attached to a work attachment of a work vehicle, and the impeller is rotated by a hydraulic motor. The main body to which the impeller blades are attached was formed into a cylindrical shape, and the hydraulic motor with reduction gear was incorporated inside the main body. In the stirrer of the first embodiment, a tubular portion is formed by projecting from a part of a side plate of a bucket into the inside of a tubular body, and a flange portion is formed at a tip portion of the tubular portion. A flange portion is formed on the inner peripheral surface of the motor, the motor portion of the hydraulic motor with speed reducer is fixed to the flange portion of the tip of the tubular portion, and the rotary drum portion on the side provided with the speed reducing structure is attached to the inner peripheral surface portion of the main body. It was fixed and attached to the flange. Further, in the second embodiment of the stirring device, a flange portion is formed on the inner peripheral surface portion of the cylindrical main body, the motor portion of the hydraulic motor with a reduction gear is fixed to the side plate portion of the bucket, and the rotation on the side provided with the reduction gear structure is performed. The drum portion was fixed and attached to the flange portion on the inner peripheral surface portion of the main body. And the above 1 and 2
In the stirring device of the embodiment, a pair of left and right impellers are provided inside the bucket, and the pair of impellers are each driven by a hydraulic motor with a speed reducer. In addition, the curved inner peripheral surface of the bottom plate of the bucket in a side view is formed in an arcuate phase centered on the axis of the impeller so as to minimize the distance from the tip of the rotating impeller. Then, a single or a plurality of soil passage holes are opened in the bottom plate of the bucket, or large holes for soil passage are opened in the bottom plate of the bucket, and grid-shaped crosspiece members are provided in the large holes. Alternatively, a soil passage hole is opened in the bottom plate of the bucket, and a cover plate for closing the soil passage hole is provided on the outer peripheral surface of the bottom plate so as to be openable and detachable. And as the removable cover plate,
The cover plate itself was not provided with holes in its bottom, provided with holes, or provided with grid-shaped crosspiece members.

In another embodiment of the stirring apparatus of the present invention, a support arm is provided on a vehicle body of a work vehicle so as to be vertically rotatable by a hydraulic cylinder, and an impeller for stirring and mixing soil is provided at the tip of the support arm. The impeller is rotated by one or more hydraulic motors. Further, in the above case, a pair of left and right arms are extended forward at the front part of the support arm, and a flange part whose center is in the left-right direction is provided at the front part of each arm, and the flange part respectively has a hydraulic motor with a reducer. The impeller was attached to the rotating drum part which fixed the motor part and provided the speed reduction structure of the hydraulic motor with a speed reducer. Alternatively, a stirring device is attached to the front side of the support arm, and a bucket having a stirring means is attached to the tip of the work attachment of the work vehicle.

Further, according to the present invention, the hydraulic motor of the agitator mounted on the front side of the support arm, the hydraulic motor of the reducer, and the hydraulic motor of the agitator mounted on the tip of the work attachment can be rotated normally and reversely. did.

[0007]

In the stirrer according to the first and second embodiments of the present invention, when the hydraulic motor with a speed reducer mounted on the bucket is rotated,
Since the motor part of the hydraulic motor with a speed reducer is fixed to the bucket side plate side, the rotary drum part on the side provided with the speed reduction structure rotates. An impeller having a plurality of blades is attached to the rotating drum portion.The flange portion formed on the inner peripheral surface of the cylindrical main body of the impeller and the flange portion of the rotating drum portion are bolted. Since it was tightened, the hydraulic motor with reduction gear could be built into the inside of the tubular body. Further, since a pair of left and right impellers are provided inside the bucket and each of the pair of impellers is driven by a hydraulic motor with a speed reducer, the impeller can be rotated with a sufficient driving force. A part of the side plate of the bucket is formed to project into the inside of the tubular body, a flange is formed at the tip of the tubular part, and a flange is formed on the inner peripheral surface of the tubular body. 1 is formed, the motor part of the hydraulic motor with a speed reducer is fixed to the flange part of the tip part of the tubular part, and the rotary drum part provided with the speed reducing structure is attached to the flange part of the inner peripheral surface part of the main body. In the stirring device of the embodiment, since the hydraulic motor with reduction gear can be installed in the substantially central portion in the left-right direction of the cylindrical main body, the driving force is transmitted to the substantially central portion of the single impeller, and the stirring rotation is performed with good left-right balance. Can be made.

In the agitator according to the first and second embodiments of the present invention, the curved inner peripheral surface of the bottom plate of the bucket in a side view is formed into an arcuate curved surface centered on the axis of the impeller, and the impeller is rotated. Since the distance from the tip is minimized, it is possible to reduce the amount of earth and sand remaining on the inner surface side of the bottom of the bucket. Since the hydraulic motor with a reducer can be operated in forward and reverse directions, the impeller can be reversed and removed when boulders, wood chips, etc. are caught between the bucket and the blade. Further, by rotating the impeller in the normal direction or in the reverse direction, it is possible to easily mix the ground improvement agent according to the state of the soil (state of free flowing, mud-like, or lumpy).

Further, in the agitating apparatus of the above-mentioned 1 and 2 of the present invention, a single or a plurality of soil passage holes are opened in the bottom plate of the bucket, or a large hole for earth passage is opened in the bottom plate of the bucket. It was perforated and a lattice-shaped crosspiece member was provided in the large hole. As a result, part of the soil can be discharged from the above-mentioned soil passage holes or large holes with grid-shaped cross-members when the soil is stirred.Therefore, select the shape of the soil passage hole according to the soil condition and improve the ground. The agent can be easily mixed. If a round bar is used as the material of the lattice-shaped crosspiece member, the adhesion of soil and sand can be reduced and the soil can be smoothly passed. In addition, in the bottom plate of the bucket, a hole for soil passage is opened, and a cover plate for closing the hole for soil passage is provided on the outer peripheral surface of the bottom plate in an openable / detachable manner, depending on the state of the soil. The stirring efficiency can be increased by opening or closing the soil passage hole.
And, as the removable cover plate, the one not having a hole in the bottom of the cover plate itself, the one having a hole, or the one having a grid-shaped crosspiece member is set. It is possible to select the most suitable one for the soil to be stirred and replace it.

In another embodiment of the stirring apparatus of the present invention, a support arm is provided at the front part of the lower traveling body which is the vehicle body of the work vehicle so as to be vertically rotatable by a hydraulic cylinder, and the tip end of the support arm is extended. Since the impeller that stirs and mixes the soil is provided in, the stirrer can be equipped in addition to the bucket.
By operating the hydraulic cylinder, the stirring work can be performed by setting the height position of the impeller to a height from the ground to a position lower than the ground. Further, in the case where the above impeller is driven by a pair of left and right hydraulic motors, the impeller can be rotated with a sufficient driving force.
In addition, a pair of left and right arms are extended forward in the front part of the support arm, and a flange part whose center is in the left-right direction is provided in the front part of each arm, and the motor part of the hydraulic motor with reduction gear is provided on each of the flange parts. In the case where the impeller is attached to the rotary drum portion that is fixed and has the speed reducing structure of the hydraulic motor with a speed reducer, the hydraulic motor with a speed reducer can be built inside the tubular body. Further, in the present invention, a stirring device is attached to the front side of the support arm,
Since the bucket having the stirring means is attached to the tip of the work attachment of the work vehicle, the efficiency of the ground improvement work can be increased by using both the stirring devices.

Further, according to the present invention, the hydraulic motor of the stirrer mounted on the front side of the support arm, the hydraulic motor of the speed reducer, and the hydraulic motor of the stirrer mounted on the tip of the work attachment can be rotated normally and reversely. did. This allows the impeller to be reversed and removed when boulders, wood chips, etc. mixed in the soil are caught between the bucket and the impeller. Further, by rotating the impeller in the normal direction or in the reverse direction, it is possible to easily mix the ground improvement agent according to the state of the soil.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of a stirring device according to a first embodiment of the present invention. In the figure, 5a is a bucket, 6L and 6R are left and right side plates of the bucket 5a (the side plate 6R is on the opposite side of the side plate 6L, so it cannot be seen in the figure), 7 is a bottom plate, and 8 is a reducer arranged inside the bucket 5a. A hydraulic motor 9 is a hydraulic pipe of the hydraulic motor 8 with a speed reducer. FIG. 2 is a cross-sectional view of the main parts of FIG. In the figure, 10 is an impeller for stirring, 11 is a main body of the impeller 10, and 12 is a plurality of blades fixed to the outer peripheral portion of the main body 11. Next, the structure and operation of the stirring apparatus according to the first embodiment of the present invention will be described with reference to FIGS. In the stirring apparatus according to the first embodiment of the present invention, the main body 11 of the impeller 10 is formed into a cylindrical shape (which is a cylindrical shape), and the inside of the cylindrical main body 11 is projected from a part of the side plate 6L of the bucket 5a. A reduced cylinder portion 13 (shown in FIG. 2) is formed, a flange portion 14 is formed at the tip portion of the cylindrical portion 13, and a flange portion 15 is formed on the inner peripheral surface portion of the cylindrical main body 11. The motor part 16 of the attached hydraulic motor 8 is replaced with the flange part 14 described above.
The flange portion 19 of the rotary drum portion 18 on the side provided with the speed reducing structure and fixed to the main body 11
It was attached to the flange portion 15 of the inner peripheral surface portion by tightening the bolt 20. As a result, when the hydraulic motor 8 with reduction gear is rotationally operated, the motor portion 16 of the hydraulic motor 8 with reduction gear is fixed to the side plate 6L side of the bucket 5a, so the rotary drum portion 18 on the side provided with the reduction gear structure Rotate. The impeller 10 is attached to the rotating drum portion 18.
Flange portion 15 formed on the inner peripheral surface portion of cylindrical body 11 of 0
And the flange portion 19 of the rotary drum portion 18 with the bolt 20.
Since it is fastened, the hydraulic motor 8 with a reducer could be incorporated inside the main body 11. Since the hydraulic motor 8 with a speed reducer can be installed in the substantially central portion of the tubular main body 11 in the left-right direction, the driving force can be transmitted to the substantially central portion of the impeller 10 and the stirring rotation can be performed with good left-right balance. .
The structure of the hydraulic motor 8 with a speed reducer is similar to that of a hydraulic motor with a speed reducer that is often used for driving a hydraulic shovel.

Next, FIG. 3 is a cross-sectional view of essential parts showing a stirring device according to a second embodiment of the present invention. In the figure, the same reference numerals are given to those using the same constituent elements as those of the stirring apparatus of the first embodiment. 8'is the left and right side plates 6'L and 6'R of the bucket 5b
The hydraulic motors with reduction gears 21L and 21R, which are installed symmetrically with the hydraulic motors 8 with reduction gears, are a pair of impellers installed symmetrically. In the second embodiment stirring device shown in FIG.
A pair of left and right impellers 21L and 21R are provided inside the side plates 6′L and 6′R of the bucket 5b.
L and 21R are driven by hydraulic motors 8 and 8'with reduction gears, respectively. Thereby, the impellers 21L, 21
R can be rotated by a sufficient driving force of the hydraulic motors 8 and 8'with reduction gears. Therefore, this agitator of the second embodiment can be applied to a bucket having a long lateral width L, and uses two small hydraulic motors with a speed reducer to reduce the drum diameter of the main bodies of the impellers 21L and 21R. be able to.

Next, FIG. 4 is a cross-sectional view of essential parts showing a stirring device according to a third embodiment of the present invention. In the stirring device of the third embodiment shown in FIG. 4, the main body 23 of the impeller 22 is formed in a tubular shape (which is a cylindrical shape), and the flange portion 24 is formed on the inner peripheral surface portion of the tubular main body 23. The motor portion 26 of the hydraulic motor 25 with a speed reducer is fixed to a part of one side plate 27 of the bucket 5C by bolts 28, and the flange portion 30 of the rotary drum portion 29 on the side provided with the speed reducing structure is described above. It was attached to the flange portion 24 on the inner peripheral surface portion of the main body 23 by tightening bolts 31. As a result, the hydraulic motor with reduction gear 25 is connected to the impeller 22.
It could be installed inside the main body 23.

Further, the bucket 5 in the stirring apparatus of the present invention
a (the same applies to the buckets 5b and 5c, but the bucket 5a shown in FIG. 1 will be described as a representative), the curved inner peripheral surface a of the bottom plate 7 in the side view is centered on the axis O of the impeller 22. It is formed in an arc curved surface to minimize the distance C between the rotating blade wheel 22 and the tip b. Thereby, bucket 5
It is possible to reduce the amount of earth and sand remaining on the inner surface side of the bottom portion of a and to improve the stirring ability. Since the hydraulic motor 8 with a speed reducer can be operated in the forward and reverse directions, the impeller 22 can be reversed and removed when a rock, a piece of wood or the like is caught between the bucket 5a and the impeller 22. . Further, by rotating the impeller 22 in the normal direction and the reverse direction, it is possible to easily mix the ground improvement agent according to the state of the soil.

Next, FIG. 5 is a perspective view showing a modified bucket 5d of the buckets 5a, 5b and 5c of the stirring devices of the first, second and third embodiments of the present invention. This modified bucket 5d
Then, a plurality of soil passage holes 33 are opened in the bottom plate 32. As a result, a part of the soil breakage can be released from the soil passage hole 33 at the time of stirring the soil breakage, so that the soil improvement agent can be easily mixed. The hole shape, size, number, etc. of the soil passage holes 33 can be set at the time of manufacturing the bucket in accordance with the soil condition.

Next, FIG. 6 is a perspective view showing a modified bucket 5e in the stirring apparatus of the present invention. In this modified bucket 5e, a large hole 35 for soil passage is opened in the bottom plate 34 thereof, and a grid-shaped crosspiece member 36 is provided in the large hole 35. The operation of the bucket 5e is similar to that of the bucket 5d, but when a round bar material (including a pipe material) is used as the material of the lattice-shaped crosspiece member, adhesion of earth and sand is reduced and the soil is smoothly passed. be able to.

Next, FIG. 7 is a side view showing a modified bucket 5f in the stirring apparatus of the present invention. In this modified example bucket 5f, a cover plate 39 for opening a soil passage hole 38 in the bottom plate 37 and closing the soil passage hole 38.
Is provided on the outer peripheral surface of the bottom plate 37 so as to be openable and closable, and is opened and closed by the hydraulic cylinder 42. Therefore, the soil passage hole 38 can be opened or closed by operating the hydraulic cylinder 42 according to the state of the soil to be stirred.

Next, FIG. 8 is an exploded perspective view of a modified bucket 5g in the stirring apparatus of the present invention. In this modified bucket 5g, a soil passage hole 44 is opened in the bottom plate 43, and a cover plate 45 for closing the soil passage hole 44 can be attached to and detached from the outer peripheral surface portion of the bottom plate 43 by tightening bolts 46. Attached to. And the cover plate 45
As shown in FIG. 8, a hole is not provided in the bottom of the cover plate itself, or a hole (not shown) is provided in the bottom of the cover plate (the soil passage hole 33 of the bucket 5d shown in FIG. 5).
(Holes similar to the above) or a grid-like crosspiece member (a crosspiece member similar to the crosspiece member 36 of the bucket 5e shown in FIG. 6) is set. Thereby, it is possible to select the most suitable one for the soil to be agitated and replace it. The operation of the bucket 5g is similar to that of the bucket 5f.

Next, FIG. 9 is a partially cutaway side view of a ground improvement machine 47 equipped with a stirring device according to a fourth embodiment of the present invention.
In the figure, 48 is a lower traveling body of the ground improvement machine 47, and 49.
Is a bracket fixed to the front part of the frame of the lower traveling body 48, 50 is a support arm, 51 is an impeller for ground agitation, 5
2 is a hydraulic cylinder, 53 is an upper revolving structure, 54 is a hopper provided at the rear of the upper revolving structure 53 for receiving the ground improvement agent, 55
Is a ground improvement agent pressure-feeding pump provided in the hopper 54, 56 is a work attachment mounted on the front part of the upper swing body 53, 57 is a bucket attached to the tip of the work attachment 56, and 58 is a ground improvement agent pressure-feeding pump 55. It is a hose for transferring the ground improvement agent, which is piped to the tip of the work attachment 56. FIG. 10 is a plan view of an essential part viewed from A of FIG. In the figure, 59 and 59 'are hydraulic motors.

Next, the construction and operation of the stirring apparatus according to the fourth embodiment of the present invention will be described with reference to FIGS. 9 and 10. In the stirrer of the fourth embodiment, a support arm 50 is vertically rotatably extended by a hydraulic cylinder 52 at the front part of the frame of the lower traveling body 48 of the ground improvement machine 47 (the base machine of the machine body is a hydraulic excavator). An impeller 51 that stirs and mixes soil is provided at the tip of the support arm 50, and the impeller 51 is rotated by a pair of left and right hydraulic motors 59, 59 '. In the fourth embodiment, a stirring device other than the bucket 57 can be installed. And the hydraulic cylinder 52
By operating, the height position of the impeller 51 can be set to a height from the ground (GL) to a position lower than the ground to perform the stirring work. Also, the above-mentioned impeller 5
Since 1 is driven by the pair of left and right hydraulic motors 59, 59 ', the impeller 51 can be rotated with a sufficient driving force.

Next, FIG. 11 is a plan view of a notched main portion of a ground improvement machine 47 equipped with a stirring device according to a fifth embodiment of the present invention. In the agitator of the fifth embodiment, a pair of left and right arms 60 is provided at the front of a support arm 50a provided at the front of the lower traveling body 48. The components will be described with representative reference numerals) extending forward, and each of the arms 60 has a flange portion 61 whose center is in the left-right direction, and the flange portion 61 is provided with a hydraulic gear with reduction gear. The motor portion 63 of the motor 62 is fixed, and the rotary drum portion 64 having the speed reduction structure of the hydraulic motor 62 with a speed reducer is attached to the inner peripheral surface portion of the main body 66 of the impeller 65. A portion of the hydraulic motor with reduction gear 62 connected to the hydraulic pipe 67 is covered with a cover 68 (only the cross section is shown). In addition, a pair of left and right impellers 65
The overall width w of the vehicle can be set to be substantially the same as or smaller than the vehicle width W of the lower traveling body 48. Further, the hydraulic motor 62 with a reducer can be incorporated inside the tubular main body 66 of the impeller 65.

Next, FIG. 12 is a plan view of a notched main portion of a ground improvement machine 47 equipped with a stirring device according to a sixth embodiment of the present invention. In this sixth embodiment stirring device, a pair of left and right arms 69 is provided in front of a support arm 50b provided at the front part of the lower traveling body 48 (right side because the sixth embodiment stirring device is formed substantially symmetrically). (The components will be described with reference numerals typically) are extended to the front, a pair of left and right impellers 70 are arranged inside the pair of arms 69, and the front portions of the arms 69 are respectively arranged. A flange portion 71 whose center is in the left-right direction is provided, the motor portion 73 of the hydraulic motor 72 with a reducer is fixed to the flange portion 71, and the hydraulic motor 7 with a reducer is provided.
The impeller 7 is provided with the rotating drum portion 74 having the deceleration structure of 2.
It was attached to the inner peripheral surface of the main body 75 of No. 0. As a result, the hydraulic motor 72 with a reducer can be incorporated inside the tubular main body 75 of the impeller 70.

Next, FIG. 13 is a partially cutaway side view of a ground improvement machine 47 'equipped with a stirring device according to a seventh embodiment of the present invention. In the figure, the same reference numerals are given to those using the same constituent elements as those of the stirring device of the fourth embodiment shown in FIG. FIG.
In the ground improvement machine 47 ′ shown in FIG. 3, a stirring device is attached to the front side of the support arm 50, and the work attachment 5
A bucket 57 'equipped with stirring means was attached to the tip of the 6'. Therefore, the efficiency of ground improvement work can be improved by using both of the above stirring devices.

Further, in the present invention, the hydraulic motors with reduction gears 8, 8 ', 25, 6 installed in the respective stirring devices of the embodiments are also provided.
2, 72 and hydraulic motors 59, 59 are capable of forward and reverse rotation. This allows the impeller to be reversed and removed when boulders, wood chips, etc. mixed in the soil are caught between the bucket and the impeller. Further, by rotating the impeller in the normal direction or in the reverse direction, it is possible to easily mix the ground improvement agent according to the state of the soil.

[0026]

In one embodiment of the present invention, when the hydraulic motor with speed reducer mounted on the bucket is rotated, the motor part of the hydraulic motor with speed reducer is fixed to the side plate of the bucket. The rotary drum on the side provided with the speed reduction structure rotates. Since the flange portion of the rotating drum portion is fixed to the flange portion formed on the inner peripheral surface portion of the tubular main body of the impeller, the hydraulic motor with a speed reducer can be built inside the impeller. . Therefore, rocks and the like mixed in the agitated soil can be prevented from directly colliding with the hydraulic motor, and the maintainability of the hydraulic motor can be improved. In addition, a tubular part is formed by protruding part of the side plate of the bucket into the tubular main body, and a flange is formed at the tip of the tubular part, and a flange is provided on the inner peripheral surface of the tubular main body. Formed, the motor part of the hydraulic motor with reduction gear is fixed to the flange part of the tip part of the cylinder part, and the rotating drum part on the side having the speed reduction structure is attached to the flange part of the inner peripheral surface part of the main body. In the device, since the hydraulic motor with reduction gear can be installed in the substantially central portion in the left-right direction of the cylindrical main body, the driving force can be transmitted to the substantially central portion of the single impeller, and the stirring rotation can be performed with good left-right balance. . Further, since a pair of left and right impellers are provided inside the bucket and each of the pair of impellers is driven by a hydraulic motor with a speed reducer, the impeller can be rotated with a sufficient driving force. Moreover, the invention can be applied to a bucket having a long width, and the drum diameter of the main body of the impeller can be reduced by using two small hydraulic motors with a reducer. In addition, the curved inner circumferential surface of the bottom plate of the bucket is formed into an arcuate curved surface centered on the axis of the impeller to minimize the distance from the tip of the rotating impeller. The amount of earth and sand remaining on the inner surface side of the bottom can be reduced, and at the same time, stirring efficiency can be improved. Since the hydraulic motor with a reducer can be operated in forward and reverse directions, the impeller can be reversed and removed when boulders, wood chips, etc. are caught between the bucket and the blade. In the present invention, whether to open a single through a plurality of soil passage holes in the bottom plate of the bucket,
Alternatively, a large hole for soil passage was opened in the bottom plate of the bucket, and a grid-shaped crosspiece member was provided in the large hole. As a result, part of the soil can be discharged from the above-mentioned soil passage holes or large holes with grid-shaped cross-members when the soil is stirred.Therefore, select the shape of the soil passage hole according to the soil condition and improve the ground. The agent can be easily mixed. If a round bar is used as the material of the grid-shaped crosspiece member, the adhesion of soil and sand can be reduced and the soil can be smoothly passed. In addition, in the bottom plate of the bucket, a hole for soil passage is opened, and a cover plate for closing the hole for soil passage is provided on the outer peripheral surface of the bottom plate in an openable / detachable manner, depending on the state of the soil. Open or close the soil passage holes,
The stirring efficiency can be increased. And, as the removable cover plate, the one not having a hole in the bottom of the cover plate itself, the one having a hole, or the one having a grid-shaped crosspiece member is set. Select the most suitable one for the soil to stir,
It can be replaced. Further, in another embodiment of the stirring device of the present invention, a support arm is rotatably extended vertically by a hydraulic cylinder at the front part of the lower traveling body that is the vehicle body of the work vehicle, and soil is provided at the tip of the support arm. Since the impeller for stirring and mixing is provided, by operating the hydraulic cylinder, it is possible to perform the stirring operation by setting the height position of the impeller to a height from the ground level to a position lower than the ground level. Further, since this stirring device is equipped on the lower traveling body, workability can be improved by using the bucket mounted on the tip of the work attachment of the ground improvement machine during work. Further, according to the present invention, the agitator is attached to the front side of the support arm, and the bucket having the agitator is attached to the tip of the work attachment of the work vehicle. Work efficiency can be improved. Further, in the present invention, the hydraulic motor of the stirrer mounted on the front side of the support arm, the hydraulic motor with the speed reducer, and the hydraulic motor with the speed reducer of the stirrer mounted on the tip of the work attachment,
It is possible to rotate forward and reverse. This allows the impeller to be reversed and removed when boulders, wood chips, etc. mixed in the soil are caught between the bucket and the impeller. Further, by rotating the impeller in the normal or reverse direction, it is possible to easily mix the ground improvement agent according to the state of the soil.

[Brief description of drawings]

FIG. 1 is a side view of a stirring device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part of FIG.

FIG. 3 is a cross-sectional view of essential parts showing a stirring device according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of essential parts showing a stirring device according to a third embodiment of the present invention.

FIG. 5 is a perspective view showing a modified bucket of the stirring device of the present invention.

FIG. 6 is a perspective view showing a modified bucket in the stirring device of the present invention.

FIG. 7 is a side view showing a modified bucket in the stirring device of the present invention.

FIG. 8 is an exploded perspective view of a modified bucket of the stirring device of the present invention.

FIG. 9 is a partially cutaway side view of a ground improvement machine equipped with a stirring device according to a fourth embodiment of the present invention.

FIG. 10 is a plan view of an essential part seen from A in FIG.

FIG. 11 is a plan view of a notched main portion showing a stirring device according to a fifth embodiment of the present invention.

FIG. 12 is a plan view of a notched main portion showing a stirring device according to a sixth embodiment of the present invention.

FIG. 13 is a partially cutaway side view of a ground improvement machine equipped with a stirring device according to a seventh embodiment of the present invention.

FIG. 14 is a front view of a stirring bucket according to an embodiment of the related art.

[Explanation of symbols]

3, 59, 59 'hydraulic motors 5a, 5b, 5c, 5d, 5e, 5f, 5'f, 5g,
57, 57 'bucket 6L, 6'L, 6R, 6'R27 side plate 7, 32, 34, 37, 43 bottom plate 8, 8', 25, 62, 72 hydraulic motor with reducer 10, 21L, 21R, 22, 51,65,70 Impeller 11,23,66,75 Main body 13 Cylindrical part 14,15,19,24,30,31,61,71 Flange part 16,26,63,73 Motor part 18,29,64, 74 rotating drum part 33 soil passage hole 35 large hole 36 cross member 38,44 soil passage hole 39,45 cover plate 42,52 hydraulic cylinder 47,47 'ground improvement machine 48 lower traveling body 50,50a, 50b support arm 60, 69 arm

Claims (14)

[Claims] 1. An impeller for stirring and mixing soil is provided inside a bucket attached to a work attachment of a work vehicle,
In the agitator in which the impeller is rotated by a hydraulic motor, the main body to which the impeller blades are attached is formed into a tubular shape, and the hydraulic motor with a speed reducer is incorporated inside the main body. Agitating device for ground improvement machine. 2. A stirrer for a ground improvement machine according to claim 1, wherein a tubular portion projecting from a part of the side plate of the bicket into the tubular main body is formed, and the tip of the tubular portion is formed. And a flange on the inner peripheral surface of the cylindrical main body to fix the motor of the hydraulic motor with speed reducer to the flange on the tip of the cylinder, and to provide a speed reduction structure. A stirrer for a ground improvement machine, characterized in that the rotating drum part on the raised side is fixedly attached to the flange part of the inner peripheral surface part of the main body. 3. A stirrer for a ground improvement machine according to claim 1, wherein a flange portion is formed on an inner peripheral surface portion of the tubular main body, and a motor portion of the hydraulic motor with a reduction gear is attached to a side plate portion of the bucket. A stirrer for a ground improvement machine, characterized in that a rotary drum portion on the side provided with a speed reducing structure is fixed to a flange portion on the inner peripheral surface of the main body. 4. The stirring device for a ground improvement machine according to claim 2 and claim 3, wherein a pair of left and right impellers are provided inside the bucket, and the pair of impellers are respectively provided with hydraulic motors with reduction gears. A stirring device for a ground improvement machine, which is characterized in that it can be driven by. 5. The stirrer for a ground improvement machine according to claim 1, wherein the curved inner peripheral surface of the bottom plate of the bucket in side view is formed into an arcuate curved surface centered on the axial center of the impeller,
A stirring device for a ground improvement machine, characterized in that the distance from the tip of a rotating impeller is minimized. 6. The stirrer for a ground improvement machine according to claim 1, wherein a single or a few soil passage holes are opened in the bottom plate of the bucket. . 7. The stirring device for a ground improvement machine according to claim 1, wherein a large hole for soil passage is opened in the bottom plate of the bucket, and a grid-shaped crosspiece member is provided in the large hole. Stirrer for ground improvement machine. 8. The stirring device for a ground improvement machine according to claim 1, wherein a bottom plate of the bucket is provided with a soil passage hole, and a cover plate for closing the soil passage hole is provided on the bottom plate. A stirrer for a ground improvement machine, which is openably and closably provided on the outer peripheral surface. 9. The stirring apparatus for a ground improvement machine according to claim 1, wherein a cover plate for opening a soil passage hole in the bottom plate of the bucket and closing the soil passage hole is provided. Those without holes in the bottom of the plate itself,
A stirring device for a ground improvement machine, wherein a hole is provided or a grid-shaped crosspiece member is detachably attached to the outer peripheral surface of the bottom plate. 10. A support arm is provided on a body of a work vehicle so as to be vertically rotatable by a hydraulic cylinder, and an impeller for stirring and mixing soil is provided at a tip end of the support arm, and the impeller is rotated by a hydraulic motor. A stirring device for a ground improvement machine, which is characterized by being squeezed. 11. The agitation device for a soil improvement machine according to claim 10, wherein the impeller is driven by a pair of left and right hydraulic motors. 12. A stirrer for a soil improvement machine according to claim 10, wherein a pair of left and right arms are extended forward, and a front and rear flange portion of each arm is provided with a centered left and right flange portion. A ground improvement machine characterized in that the motor portion of the hydraulic motor with reduction gear is fixed to each of the flange portions, and the impeller is attached to the rotating drum portion having the reduction structure of the hydraulic motor with reduction gear. Stirrer. 13. The stirring device for a ground improvement machine according to claim 10, wherein a bucket having a stirring means is attached to a tip of a work attachment of a work vehicle. . 14. Claims 1 and 1
The agitation device for a ground improvement machine according to 0, wherein a hydraulic motor with a speed reducer and a hydraulic motor are capable of forward and reverse rotation.