JP3260325B2 - Ground improvement machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground improvement machine having an excavation device which descends into the ground and agitates and mixes the ground and solidified material powder or slurry.

[0002]

2. Description of the Related Art Conventionally, there has been a ground improvement machine 101 which is an excavating device which descends into the ground to stir and mix the ground. This ground improvement machine 101, as shown in FIG.
A self-propelled backhoe 103 having a crawler 102 is held at a distal end 105 of an arm 104 that is movable. The ground improvement machine 101 excavates the ground, descends while stirring, and mixes with the solidified material. The ground improvement machine 101
A solidifying material discharging device 106 for discharging the solidifying material is mounted.

[0003] As shown in FIG.
Has a gate-shaped machine frame 10 having a connecting portion 107 that is connected to a tip portion 105 (not shown) of an arm 104 (not shown).
8 are provided. The machine frame 108 includes side plates 108A,
108B are provided. Above the machine frame 108, a drive shaft 109 is mounted. In addition, a drive motor 110 that rotationally drives a drive shaft 109 is provided on an upper inner wall of the side plate 108A of the machine frame 108. A sprocket 111 is fixed to the right end of the drive shaft 109 in the drawing. Drive wheels 112A and 112B are fixed to the rotating shaft 113 below the drive motor 110. A sprocket 114 is fixed to the right end of the rotating shaft 113 in the drawing. The sprocket 111 and the sprocket 114 are engaged by a chain 115. The ground improvement machine 101 includes a machine frame 1
A reinforcing frame 116 is provided at the upper side so that 08 can withstand the pressing by earth and sand. The horizontal frames 117, 118, 119 are also provided below the drive wheels 112A, 112B so that the machine frame 108 can withstand the pressing by earth and sand.

[0004] Support frames 120A and 120B are suspended from the horizontal frames 117, 118 and 119 at positions corresponding to the drive wheels 112A and 112B. This support frame 120A, 12
Guide wheels 121A and 121B are axially attached to the lower end of 0B.

[0005] Sprockets 111 and 114 and chain 1
A chain box 122 is provided so as to prevent earth and sand from being caught and causing an operation failure when the 15 operates.

[0006] Between the chains 123A, 123B,
A solidified material feed pipe 128 for feeding the solidified material is provided, and a solidified material discharge device 106 is provided at a lower end of the solidified material pressurized pipe 128. The solidified material discharge device 106 includes an induction wheel 121.
A, 121B.

[0007] As shown in FIG.
Chains 123A and 123B are stretched endlessly between 12B and the guide wheels 121A and 121B.
On the outer surfaces of the chains 123A and 123B, a plurality of rows of wide-width stirring blades 124A and narrow-width stirring blades 124B for excavating and stirring the ground are provided.

Further, arcuate leaf springs 125A and 125B are welded to the support frames 120A and 120B, and auxiliary wheels 126A and 126B are attached to the apex portions.
On the opposite side of the auxiliary wheels 126A, 126B via the auxiliary frames 127A, 127B via the support frames 120A, 120B.
A, 120B, and the chains 123A, 1
23B is adjusted so as not to be loosened.

Next, the operation of the conventional ground improvement machine 101 having the above configuration will be described. When performing ground improvement work, the backhoe 10
3 is moved to the work place, and the tip 10 of the arm 104 is moved.
5, the ground improvement machine 101 having the connecting portion 107 connected thereto,
By operating the arm 104, it is set up vertically on the ground.

Next, when the drive motor 110 is rotated by the operation of the operator, the drive shaft 109 rotates. With the rotation of the drive shaft 109, the sprocket 111 fixed to the drive shaft 109 also rotates in conjunction therewith. Drive motor 11
The power generated by 0 is transmitted from sprocket 111 to sprocket 114 via chain 115. In response to the rotation of the chain 115, the sprocket 11
The rotating shaft 113 to which the sprocket 114 and the sprocket 114 are fixed integrally rotates. The guide wheels 112A and 112B fixed to the rotation shaft 113 also rotate integrally with the rotation shaft 113.

When the drive wheels 112A and 112B rotate,
Chain 123 around which drive wheels 112A and 112B are wound
A and 123B are guide wheels 121A and 121B and auxiliary wheels 12
6A, 126B, 127A, and 127B guide and rotate. The chains 123A and 123B rotate and stir while excavating the ground with the stirring blades 124A and 124B, and lower the ground improvement machine 101 into the ground.

The solidified material sent from the solidified material pressurizing pipe 128 is discharged from the solidified material discharge device 106 and mixed with the earth and sand by the stirring blades 124A and 124B.

The conventional ground improvement machine 101 includes a chain 1
A wide stirring blade 124A and a narrow stirring blade 124B are alternately provided in each of the 23A and 123B to excavate and stir the ground around the machine, and to sediment and the solidified material provided near the guide wheels 121A and 121B. There is a characteristic that the solidified material discharged from the discharge device 106 is easily mixed uniformly.

[0014]

However, the conventional ground improvement machine 101 has the following problems. (1) As shown in FIG. 13, a conventional ground improvement machine 101
Since the guide wheels 121A and 121B have a circular shape, the improved bottom surface has a semicircular shape. Normally, when working using a ground improvement machine, the work area is wide, and therefore the ground improvement machine 101
A1, second 123A2, third 123A3, fourth 1
Repeat the mixing times with 23A4. The ground improvement machine 101
In order to improve the improved reference plane X horizontally without unevenness with the minimum number of mixing times, the guide wheels 121A1, 121A2, 121A are used.
3, and each half of 121A4 is dug deeper than the improved reference plane X. However, the guide wheels 121A1, 121A
The portion S1 dug down from the improved reference plane X by 2, 121A3 and 121A4 is an overhang, and such an overhang deteriorates work efficiency. Also, as shown in FIG.
The auxiliary wheels 126A and 126B are the guide wheels 121A and 121B.
In addition to the area of the ground requiring improvement, in addition to the area of the ground requiring improvement, excavation and agitation must be performed to the portion S2 where the solidified material from the solidified material discharge device 106 in the direction of the auxiliary wheels 126A and 126B to the auxiliary wheels 126A and 126B is not mixed. For example, the improved reference plane X cannot be mixed without unevenness to every corner. Therefore, in order to improve the portion S2 where the solidified material is not mixed, the auxiliary wheels 126A and 126B and the guide wheels 121A and 121A are improved.
Since it is necessary to wrap the overhanging portions in the chains 123A and 123B of the 21B, the overhanging portions are left over and the work efficiency is reduced.

(2) Since the drive motor 110 is provided above the machine frame 108, a chain 115 for transmitting the power generated by the drive motor 110 to the drive wheels 112A and 112B is provided on the outer wall of the side plate 108B.
5. Sprocket 111 and sprocket 114 around which
Are also formed on the outer wall of the side plate 108B, so as to prevent them from entraining earth and sand and causing malfunction,
A chain box 122 is provided. Therefore, as shown in FIG. 12, since the ground below the chain box 122 is not stirred by the stirring blades 124A and 124B, the hatched portion S4 in the figure is an unimproved portion, and the ground improvement machine 101 penetrates into the ground. In this case, there is a problem that the work efficiency is reduced.

(3) Since the machine frame 108 has a ceiling provided with the connecting portion 107 and a reinforcing frame 116, the side plates 108A and 108B are provided so that the chains 123A and 123B do not catch on the reinforcing frame 116. Is a stirring blade 124
A is provided outside the orbit range 124A 'of A. Therefore, when the ground improvement machine 101 penetrates into the soil, the side plate 8
Since A and 8B are lowered to the hatched portions S3 and S4 in the drawing, which are unimproved portions, a penetration resistance is generated and work efficiency is poor.

(4) The ground improvement machine 1 descending into the ground because the ceiling of the machine frame 108 formed in a gate shape is flat.
When the ground improvement machine 101 is pulled out, the ground improvement machine 101 is pulled out while receiving resistance from the overlying soil, which reduces work efficiency, and also places a burden on the connecting portion 107 which is connected to the distal end portion 105 of the arm 104, thereby causing a failure. There is a problem that there is a risk of doing so.

(5) The ground improvement machine 101 includes
7, the arm 104 is supported by the distal end portion 105 of the arm 104. This joint 107 is provided on the ceiling of the machine frame 108,
Further, in order to hold the drive shaft 109 and the horizontal frames 117, 118, 119, the machine frame 108 is formed in a gate shape. The side plates 108A and 108B are provided with stirring blades 124 so that the chains 123A and 123B do not contact the gate-shaped machine frame 108.
A must be arranged outside the track range 124A 'of A. Therefore, the lower portions of the side plates 108A and 108B become unimproved portions S3 and S4, which cause penetration resistance, and have a problem of reducing work efficiency.

(6) FIG. 15A is a bottom view of FIG. Solidification material discharge device 10 of conventional ground improvement machine 101
6 is disposed between the guide wheels 121A and 121B, and as shown in FIG.
Even if the solidified material is discharged from the guide wheels 121A, 121B
Block the left and right discharge ports, so that the solidified material discharge range T
No. 1 is only between the guide wheels 121A and 121B, cannot discharge the solidified material to every corner of the orbital range 124A 'of the stirring blade 124A, and has a problem that mixing efficiency between the solidified material and the ground is poor. .

(7) Further, as shown in FIG. 12, since the stirring blades 124A and 124B have cutter blades formed only in the outward direction, a clearance is secured in the earth and sand around the discharge port of the solidified material discharge port device 106. However, there is a problem that the solidified material is difficult to be discharged, and even if the solidified material is discharged, it is difficult to uniformly mix the soil and the solidified material by the stirring blades 124A and 124B.

As described above, in the conventional ground improvement machine, the resistance at the time of underground penetration caused by the unreformed portion of the ground, the resistance due to the underground withdrawal caused by the unimproved portion of the ground, and the imperfections around the discharge port of the solidified material. Since the working efficiency is reduced by the proper mixing, there is a problem that the purpose of the ground improvement cannot be sufficiently achieved.

Accordingly, the present invention provides a ground improvement machine which does not excavate an improved reference surface, reduces the resistance caused by intrusion and withdrawal from the ground, and can more completely mix soil and solidified material. The purpose is to provide.

[0023]

To achieve the above object, a ground improvement machine according to the present invention has the following configuration. (1) In order to solve the problem (1) to be solved by the invention, a ground improvement machine according to the present invention includes a backhoe arm.
It is attached to the tip end, and is driven under the ground by a chain provided with a stirring blade formed on the driving wheel and the guide wheel and having a cutter blade formed on the outer periphery thereof, whereby the ground is stirred by the stirring blade. In the ground improvement machine to be stirred, the drive wheels are held
And a support that bifurcates at the lower end of the structure.
The holding frame and the lower end of one of the bifurcated support frames
A first shaft center rotatably held, and a bifurcated branch
The first shaft is rotatably held at the lower end of one of the support frames.
A second axis parallel to the center and the guide wheel at the first axis.
A second guide wheel is fixedly mounted on the second shaft center.
And the chain includes the guide wheel and the second guide.
It is stretched horizontally with a wheel. The ground improvement machine of the present invention having such a configuration produces the following operations and effects. That is, since the axis of the guide wheel and the axis of the second guide wheel are disposed horizontally, the improved bottom surface is flat, and there is no need to dig down to the middle of the guide wheel, and there is no need to dig the improved reference plane. . In addition, the chain having the stirring wheel that winds the drive wheel, the guide wheel, and the second guide wheel rotates horizontally between the guide wheel and the second guide wheel, so that the area of the improved bottom portion is increased,
The number of times of mixing of earth and sand and solidified material is reduced, and work efficiency is improved.

(2) Problems to be solved by the invention (2)
To resolve, ground improvement machine of the present invention, (1)
A soil improvement machine that is described, a motor for driving the front SL drive wheels, chains for connecting the motor and the drive wheels, of the stirring blade having a plurality arrayed on the outer peripheral surface of the chain It is provided in the track. The ground improvement machine of the present invention having such a configuration produces the following operations and effects. That is, since the drive motor is disposed in the track of the stirring blades arranged in a plurality of rows on the outer peripheral surface of the chain having the stirring blades, the earth and sand are prevented from entering the chain or sprocket that conducts the power of the drive motor. The chain box can be provided in the track of a plurality of rows of agitating blades on the outer peripheral surface of the chain, and the lower part of the chain box is agitated by the agitating blades. The portion is eliminated, and the resistance when the ground improvement machine penetrates into the ground can be reduced.

(3) Problems to be solved by the invention (3)
In order to solve the problem, the ground improvement machine of the present invention is the ground improvement machine described in (2), wherein a plurality of machine frames supporting a drive shaft of the motor are provided on an outer peripheral surface of the chain. Is provided in the orbit of the agitated impeller. The ground improvement machine having such a configuration produces the following operations and effects. That is, since the machine frame is provided in the orbit of the stirring blades formed on the outer peripheral surface of the chain, the ground is stirred to the outside of the machine frame, and when the ground improvement machine penetrates into the ground, Since the frame does not pass through the unstirred portion, the penetration resistance is reduced, and the working efficiency is improved.

( 4 ) Problems to be solved by the invention (6)
To resolve, ground improvement machine of the present invention, (1)
A soil improvement machine described solidification, solidifying material discharge device for discharging the solidified material in the ground plate is provided in the middle of the said inductive wheel second induction wheels, discharged from the solidified material discharge device The material discharge range is discharged to every corner of the orbit range of the stirring blade. The ground improvement machine of the present invention having such a configuration produces the following operations and effects. That is, since the solidified material discharging device is provided between the guide wheel and the second guide wheel,
The discharge port is not blocked by the induction wheel. Therefore, the solidified material can be discharged to every corner of the orbital range of the stirring blade, and the solidified material and the ground can be efficiently mixed.

( 5 ) Problems to be solved by the invention (7)
In order to solve the problem described above, the ground improvement machine of the present invention is the ground improvement machine according to (1), wherein the stirring blade protrudes toward an outer periphery and has a first cutter blade parallel to the chain. A second cutter blade projecting toward the periphery. The ground improvement machine of the present invention having such a configuration produces the following operations and effects. That is, since the cutter blades are formed at the outer and inner ends of the stirring blade, when the inner second cutter blade passes through the ground around the discharge port, which is the inner ground of the chain, the cutter blades are formed in the closed soil. By creating voids and facilitating ejection of the solidified material, more complete mixing can be achieved.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a ground improvement machine according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view in which the ground improvement machine 1 of the first embodiment is mounted on a distal end portion 5 of an arm 4 of a backhoe 3. As shown in FIG.
A movable arm 4 extends from a self-propelled backhoe 3 having a crawler 2. The first end 5 of the present invention, which descends into the ground and stirs and mixes the ground, is provided at the tip 5 of the arm 4.
The connecting portion 7 of the ground improvement machine 1 of the embodiment is connected.

FIG. 2A is a front view of the ground improvement machine 1 according to the first embodiment, and FIG. 2B is a drawing resistance surface of the stirring member 24A with the orbital range 24A 'and the support member 36 viewed from above. 36 'is indicated. FIG. 3 is a sectional view taken along the line AA of FIG. FIG. 4 is a right side view of FIG. As shown in FIG. 2A, the ground improvement device 1 includes a plate-shaped center holding member 33 that hangs down from the joint 7 as a structure.
In the ground improvement machine 1, the side plates 8A and 8B are configured as a structure via a support member 36. Therefore, the entire ground improvement machine 1 includes the center holding member 33 and the side plate 8.
A and the side plate 8B form a structure, which is connected to the joint 7.

On the upper portion between the side plates 8A and 8B, a rotating shaft 13 is provided.
Penetrates the center holding member 33 and is horizontally mounted on the shaft. The rotating shaft 13 is provided with side plates 8A and 8
B, held by the center holding member 33. Rotating shaft 13
Has a sprocket 14 fixed to the right end in the figure. Drive wheels 12A and 12B, which are sprockets, are fixedly mounted on the rotating shaft 13 on both sides of the center holding member 33.

A drive motor 10 is provided below the drive wheel 12B at a predetermined distance that does not hinder the rotation of the drive wheel 12B. The drive motor 10 is fixed to a side plate 8C fixed inside one side plate 8B. The drive motor 10 is a variable drive motor that drives the drive shaft 9 to rotate. The drive shaft 9 protrudes on the opposite side of the side plate 8C.
A sprocket 11 is fixed to the center of the drive shaft 9 in the figure. A chain 15 that transmits the rotational motion of the drive shaft 9 to the sprocket 14 is wound around the sprocket 11 that rotates integrally with the drive shaft 9. The drive motor 10 is provided with a motor cover 37 for preventing earth and sand from entering and causing an operation failure.

At the lower ends of the side plates 8A and 8B, a horizontal frame 1 forming a structure penetrating the lower end of the central holding member 33 is provided.
9 is mounted horizontally. The horizontal frame 19 includes a support frame 20.
A, 20B are attached. Support frames 20A, 20B
Are hung at positions corresponding to the drive wheels 12A and 12B.

As shown in FIG. 3 and FIG.
A first shaft center 38 is rotatably held at the lower ends of A and 20B. Guide wheels 21A, 21
B is fixed. A tine stirring blade 34 (not shown) is attached to the first shaft center 38. Guide wheels 21A, 2
One of 1B is a sprocket and the other is an idler. The reason why one of the guide wheels 21A and 21B is a sprocket is to transmit the driving force to the tine stirring blade 34.

At a predetermined angle from the predetermined positions of the support frames 20A, 20B with respect to the support frames 20A, 20B, one ends of the support frames 30A, 30B are connected to the support frames 20A, 20B.
0B. A second axis 39 is rotatably held at the other ends of the support frames 30A and 30B. The second guide wheels 31A and 31B are fixed to the second shaft center 39. As shown in FIG. 2, a tine-type stirring blade 35 is attached to the second axis 39 of the second guide wheels 31A and 31B. One of the second guide wheels 31A and 31B is a sprocket, and the other is an idler. Since one of the second guide wheels 31A and 31B is a sprocket, the driving force is transmitted to the tine stirring blade 35, and the tine stirring blade 35 rotates to stir the earth and sand. Here, as shown in FIG. 3, the guide wheels 21A and 21B, the second guide wheel 3
Chains 23A and 23B between 1A and 31B are stretched horizontally.

The chains 23A and 23B are
A, 12B, guide wheels 21A, 21B, and second guide wheel 3
Endlessly stretched between 1A and 31B. Chain 2
On the outer peripheral surfaces of 3A and 23B, a plurality of rows of wide-width stirring blades 24A and narrow-width stirring blades 24B are alternately provided. As shown in FIG. 5, the stirring blades 24A and 24B have a cutter blade K1 having a cutting edge parallel to the chains 23A and 23B toward the outer periphery and a cutter blade having a cutting blade perpendicular to the chains 23A and 23B toward the inner periphery. It has a blade K2.

Here, as shown in FIGS. 3 and 4, the solidifying agent discharge device 6 is provided between the first axis 38 and the second axis 39. The solidified material discharge device 6 is disposed so as not to contact the tine stirring blades 34 and 35.
On the lower surface of the solidified material discharge device 6, a discharge port 6a is provided in a band shape from the left end to the right end of the solidified material discharge device 6. Here, the solidified material discharge device 6 has a width capable of discharging the solidified material to every corner of the orbit range 24A 'of the stirring blade 24A. The solidifying agent discharging device 6 discharges the solidified material that has been pressure-fed from the solidified material pressure feeding pipe 28 from the discharge port 6a. As the solidifying material, cement, lime, or the like is used, and a powder or a milk-like material thereof is used.

As shown in FIG. 3 and FIG.
The auxiliary wheels 26A, 26A,
6B is provided rotatably. Auxiliary wheels 26A, 26
B is the auxiliary wheels 26A, 2B from the second guide wheels 31A, 31B.
The chains 23A and 23B up to 6B are arranged substantially perpendicular to the ground. Auxiliary wheels 26A, 26B
Is held at the top of the leaf springs 25A and 25B. The leaf spring 25A has a chain cover 3 at the upper end.
7, and the lower end is supported by the support frame 30A.
On the other hand, the leaf spring 25B has an upper end welded to the chain cover 37 and a lower end supported by the support frame 30B. Also,
Auxiliary wheels 27A, 27 for guiding chains 23A, 23B
B is connected to the auxiliary wheels 26A, 26A, 2B via the support frames 20A, 20B.
6B, and is welded to the support frames 20A, 20B.

The ground improvement machine 1 is provided with earth and sand deflecting members 40A and 40B. As is clear from FIG. 4, the earth and sand repelling members 40 </ b> A and 40 </ b> B are arranged such that the sides forming the upward apex are disposed at the centers of the side plates 8 </ b> A and 8 </ b> B. Since it is located on a line, it is formed in a triangular shape. Further, as shown in FIG. 3, semicircular cavities are formed in the bottom surfaces of the earth and sand repelling members 40A and 40B. Here, the base of such a triangle is equal to the width of the side plates 8A and 8B. In addition, the triangle has a predetermined height that does not interfere with the connection of the connecting portion 7 to the distal end portion 5 of the main body arm 4. Then, as shown in FIG. 2, the earth and sand repelling member 40 </ b> A has a width from the left end of the support member 36 in the drawing to the left end of the connecting portion 7 in the drawing.
On the other hand, the earth and sand repelling member 40B has a width from the right end of the support member 36 in the drawing to the right end of the connecting portion 7 in the drawing. The earth and sand repelling members 40 </ b> A and 40 </ b> B are disposed so that the bottom surface where the semicircular cavity is provided is in contact with the support member 36.

Next, the operation of the ground improvement machine 1 of the present embodiment having the above configuration will be described. As shown in FIG. 1, when the solidified material is stirred and mixed with the soil to be improved, which is the object of the ground improvement processing, first, the self-propelled backhoe 3 having the crawler 2 is moved to the soil to be improved. The connecting portion 7 of the ground improvement machine 1 is connected to the tip 5 of the arm 4 of the backhoe 3. The ground improvement machine 1 is supported by a center holding member 33 configured as a structural body and side plates 8A and 8B configured as a structural body via a support member 36. The horizontal frame 19 is also configured as a structure, and supports the ground improvement machine 1.

The ground improvement machine 1 erected vertically by the arm 4 is driven by a drive motor 10 by an operator. The drive shaft 9 is rotated by the drive motor 10. The sprocket 11 rotates integrally with the rotation of the drive shaft 9. As the sprocket 11 rotates, the chain 15 also rotates, transmitting power to the sprocket 14 and rotating the sprocket 14. When the sprocket 14 rotates, the rotating shaft 13 rotates integrally with the sprocket 14, and the driving wheels 12A, 1A fixed to the rotating shaft 13
2B also rotates integrally with the rotating shaft 13.

As shown in FIG. 2 (a), when the ground improvement machine 1 descends into the ground, the chain 15 and the sprocket 11 and the sprocket 14 are prevented from entering into the chain to prevent operation failure. A box 22 is formed. The ground improvement machine 1 includes a conventional ground improvement machine 10.
It is not supported by one gate-shaped machine frame 108, but is supported by a center holding member 33 configured as a structure and side plates 8A and 8B configured as a structure via a support member 36. Therefore, the conventional ground improvement machine 10
1, the chain 15, the sprockets 11, 14
Are not provided on the outer wall of the side plate 8B, and the chains 23A, 23
Since the chain box 22 can be provided within the orbit range 24A 'of the stirring blades 24A arranged in a plurality of rows on the outer peripheral surface of the chain B, the chain box 22 also has the orbit of the stirring blades 24A arranged in a plurality of rows on the outer peripheral surfaces of the chains 23A and 23B. It can be provided within the range 24A '. Therefore, the chain box 22 does not descend on the unimproved portion unlike the chain box 122 of the conventional ground improvement machine 101, so that the penetration resistance is reduced and the working efficiency is improved.

Here, as shown in FIG. 2 (b), the removal resistance surface 36 'of the support member 36 protrudes from the orbit range 24A' of the stirring blade 24A. However, this protruding portion is a side plate of the support member 7, and since the side plate is an iron plate, it hardly affects the resistance at the time of penetration.

When the drive wheels 12A, 12B rotate, the chains 23A, 23B around which the drive wheels 12A, 12B, the guide wheels 21A, 21B and the second guide wheels 31A, 31B rotate. When the chains 23A and 23B rotate, the cutter blades K1 and K2 formed on the wide stirring blades 24A provided on the chains 23A and 23B and the narrow stirring blades 24B start excavating and stirring the ground. The ground improvement machine 1 is lowered on the ground while rotating the chains 23A and 23B.

Since the chains 23A and 23B rotate while being guided by the auxiliary wheels 26A, 26B, 27A and 27B, the drive wheels 12A and 12B and the guide wheel 21 are rotated.
A, 21B and the second guide wheels 31A, 31B are unlikely to come off. Further, since the slack of the chain is adjusted by the leaf spring 25, the drive wheels 12A and 12B and the guide wheels 21A and 21A are formed.
B, it is difficult to come off from the second guide wheels 31A, 31B. Further, the guide wheels 21A, 21B, the second guide wheels 31A, 31B
Is an idler, and the guide wheels 21A, 21
B, since either one of the second guide wheels 31A and 31B is a sprocket, the chain mounted on the idler slips, and the chain is always stretched.
Even if the chains 23A and 23B cause a jumping phenomenon to cause a shift in the rotation speed, the operation of the drive wheels 12A and 12B is not affected at all.

FIG. 15B is a bottom view of FIG. 2 of the present embodiment. The ground improvement machine 1 excavates and mixes the ground with the stirring blades 24A and 24B while being lowered into the ground. The ground improvement machine 1 discharges the solidified material from the discharge port 6a of the solidified material discharge device 6 while excavating and stirring the ground. Here, since the chains 23A and 23B are provided with the cutter blade K2, the cutter blade K2 rotates while rotating in the soil.
Since a gap is formed in the earth and sand around the discharge port 6a of the solidified material discharge device 6 and the solidified material is mixed with the earth and sand, the solidified material and the earth and sand are easily mixed, and the mixing efficiency is improved. Further, as shown in FIG. 15 (b), since both end portions of the discharge port 6a are not closed by the guide wheels 21A, 21B or the second guide wheels 31A, 31B, the orbital range 24 of the stirring blade 24A.
The solidified material can be discharged to every corner of A '.

As shown in FIG. 2 (a), the tine type stirring blades 34, 35 also rotate in conjunction with the rotation of the guide wheels 21A, 21B and the second guide wheels 31A, 31B, and the solidified material discharge device is rotated. Excavate and agitate the ground around 6. Since the unimproved portion S5, which is the lower portion of the center holding member 33, is stirred by the tine stirring blades 34, 35, the center holding member 3
The unimproved portion S5 generated by using the structure 3 is reduced, and the penetration resistance is reduced.

FIG. 6 is a diagram showing how the improved bottom surface of the ground improvement machine 1 works on the improved reference plane X. The first shaft center 38 of the guide wheels 21A and 21B and the second guide wheel 31A
Are provided in parallel, and the ground improvement machine 1 descends while improving the ground with the improved bottom surface horizontal. As shown in FIG. 14, the conventional ground improvement machine 101 uses the guide wheels 121 </ b> A <b> 1, 121 </ b> A <b> 2,
It had to dig into half of 121A3 and 121A4. However, the ground improvement machine 1 of the first embodiment
According to FIG. 6, as shown in FIG. 6, even if the number of times of mixing of the improved bottom surface portion X is repeated, the guide wheels 21A1, 21A2, 21A3 and the second guide wheels 31A1, 31A2, 31A3 are not left over, and the improved reference surface is not removed. X can be improved horizontally without unevenness. Further, even if the ground having the same area is improved, in the conventional ground improvement machine 101, only the diameters of the guide wheels 121A and 121B are improved as shown in FIG. However, according to the ground improvement machine 1 of the first embodiment, as shown in FIGS. 4 and 6, the guide wheels 21A and 21B are provided.
23A, 23 between the first and second guide wheels 31A, 31B
B operates horizontally, the diameter of the guide wheels 21A and 21B, the diameter of the second guide wheels 31A and 31B, and the guide wheel 2
It is possible to simultaneously improve the distance between the first guide wheels 1A and 21B and the second guide wheels 31A and 31B. Accordingly, the ground improvement machine 1 according to the first embodiment can improve the ground without leaving a dip, thereby improving work efficiency. Further, since the area of the improved bottom portion is also increased, the number of times of mixing is reduced, and the mixing efficiency is improved.

Further, in the conventional ground improvement machine 101, as shown in FIG. 13, since the drive wheels 126A and 126B are arranged so as to protrude beyond the guide wheels 121A and 121B, the auxiliary wheels 126A and 126B and the guide wheels are provided. 121
A, the overhang of the chain 123A, 123B of 121B was left. However, according to the ground improvement machine 1 of the first embodiment, as shown in FIG.
Chain 2 from A, 31B to auxiliary wheels 26A, 26B
Since 3A and 23B operate perpendicularly to the ground, the improved reference plane X can be improved horizontally and vertically without unevenness even if the spare wheels 26A and 26B are not dug, thereby improving work efficiency.

When the improved bottom reaches the improved reference plane X,
The ground improvement machine 1 is withdrawn to proceed to the next mixing operation. At this time, since the triangular earth and sand repelling members 40A and 40B are attached to the support member 36, the ground improvement machine 1
At the top of the mudguard, the agitated sediment is cut and lifted. Therefore, the removal resistance 36 'of the support member 36 shown in FIG. 2B can be reduced.

The ground improvement machine 1 that has been withdrawn is again erected perpendicularly to the ground. By repeating this series of operations, the ground improvement machine 1 improves the ground to be improved.

According to the first embodiment, the following effects can be obtained. (1) Conventional ground improvement machine 101 is shown in FIGS.
As shown in (1), in order to improve the improved reference plane X, half of the guide wheels 121A and 121B had to be dug below the improved reference plane X to leave a portion S1 in the figure. The auxiliary wheels 126A and 126B are used as guide wheels 121A and 12A.
1B, the hatched portion S2 in the figure had to be left over. However, the ground improvement machine 1 according to the first embodiment includes the first shaft center 38 of the guide wheels 21A and 21B.
And the axis 39 of the second guide wheel 31A, 31B is parallel,
The chains 23A and 23B are connected to the guide wheels 21A and 21B and the second
Since it is stretched horizontally with the guide wheels 31A and 31B,
The improved bottom portion becomes flat, and as shown in FIG. 6, the soil can be improved horizontally without unevenness at a time. That is, there is no need to dig down to the middle of the guide wheels 21A, 21B and the second guide wheels 31A, 31B, and the improved reference plane X does not need to be dug. In addition, the drive wheels 12A and 12B and the guide wheels 21A,
Chains 23A, 23B winding 21B and second guide wheels 31A, 31B and having stirring blades 24A, 24B
Are the guide wheels 21A, 21B and the second guide wheels 31A, 31B.
, The area of the improved bottom portion is widened, the number of times of mixing of the earth and sand and the solidified material is reduced, and the working efficiency is improved. Further, as shown in FIG. 4, the auxiliary wheels 26A, 26A
Since B does not overhang the second guide wheels 31A and 31B, the left end in the figure is not left.

(2) The conventional ground improvement machine 101 has the structure shown in FIG.
As shown in FIG. 2, since the motor 110 is provided above the reinforcing frame 116, the sprockets 11 and 14, the chain 1
5. The chain box 122 had to be attached to the outer wall of the side plate 108B. Therefore, in the conventional ground improvement machine 101, the orbital range 24 of the stirring blade 124A
There was an unmodified part S4 that could not be provided in A ′ and was not stirred and mixed by the stirring blades 24A and 24B. However, as shown in FIG. 2, the ground improvement machine 1 according to the first embodiment includes a motor 10 for driving the drive wheels 12A and 12B, and a chain 15 connecting the motor 10 and the drive wheels 12A and 12B. Are provided in the orbital range 24A 'of the stirring blades 24A arranged in a plurality of rows on the outer peripheral surfaces of the chains 23A and 23B, so that the sediment is deposited on the chain 15, the sprocket 11, and the sprocket 14 for transmitting the power of the drive motor 10. The chain box 22 for preventing entry can be provided in the track 24A 'of the stirring blades 24A arranged in a plurality of rows on the outer peripheral surface of the chains 23A and 23B. Therefore, the lower part of the chain box 22 is
Since the ground is stirred by A and 24B, there is no unimproved portion where the ground is not stirred, and the resistance when the ground improvement machine 1 penetrates into the ground can be reduced.

(3) The conventional ground improvement machine 101 has the structure shown in FIG.
As shown in FIG. 2, side plates 8A and 8B are formed outside the orbital range 124A 'of the stirring blade 124A on the reinforcing frame 116 in which the machine frame 108 is formed in a gate shape so that the chains 23A and 23B are not caught. As a result, the machine frame 108 was lowered to the unimproved portions S3 and S4, causing penetration resistance, and the work efficiency was poor. However, as shown in FIG. 2, the ground improvement machine 1 of the first embodiment
Since the plurality of rows of stirring blades 24A are provided in the orbital range 24A 'on the outer peripheral surfaces of the A and 23B, the machine frame 8 does not penetrate the unimproved portion, so that the penetration resistance is reduced and the working efficiency is reduced. improves.

(4) In the conventional ground improvement machine 101, since the ceiling portion of the machine frame 108 is flat, when it is pulled out, the upper soil becomes a pull-out resistance, and the work efficiency is poor.
Could break down. However, since the ground improvement machine 1 of the first embodiment has the triangular soil-spreading members 40A and 40B above the drive wheels 12A and 12B,
When the ground improvement machine 1 is pulled out of the ground, the upper soil is separated by the portions forming the upward vertexes of the triangular sand guards 40A and 40B and rises, so that the resistance due to the upper soil is reduced. . In addition, since the withdrawal resistance is reduced, the ground improvement machine 1 is less likely to break down because the load on the center holding member 33 and the side plates 8A and 8B, which are structures supporting the ground improvement machine 1, is reduced.

(5) The conventional ground improvement machine 101 has the structure shown in FIG.
As shown in FIG. 1, it was held by the joint 107. As shown in FIG.
Was installed on the ceiling. In addition, the machine frame 108 includes a motor 110 and a horizontal frame 11 by side plates 108A and 108B.
7, 118 and 119 were retained. Therefore, the machine frame 108, which is a structure, needs to be formed in a gate shape. Since the machine frame 108 is formed in a gate shape, the side plate 108 is formed.
A, 108B was dropped to the unimproved portions S3, S4 to cause penetration resistance. In addition, when the ceiling part was withdrawn, resistance to withdrawal was caused by the overlying soil. However, as shown in FIG. 2A, the ground improvement machine 1 of the first embodiment is a structural body because the connecting portion 7 is provided on the central holding member 33 and the ceiling does not need to be formed. The side plates 8A and 8B are connected to the chain 23.
A and 23B can be provided in the orbit range 24A 'of the stirring blades 24A arranged in a plurality of rows on the outer peripheral surface, and the resistance at the time of underground penetration can be reduced. Here, as shown in FIG. 2B, the side plate of the support member 7 supporting the side plates 8A and 8B protrudes from the orbit range 24A 'of the stirring blade 24A, but the side plate of the support member 7 is an iron plate. , Low resistance, no problem.

(6) Here, in the ground improvement machine 1 of the first embodiment, by providing the center holding member 33, an unimproved portion S5 is generated below the center holding member 33. However, by providing the tine-type stirring blades 34 and 35 on the first axis 38 and the second axis 39, the stirring blades 24A and 24B are provided.
Since the tine-type stirring blades 34 and 35 stir the unimproved portion S5 of the lower portion of the central holding member 33, which has not been able to stir, the penetration resistance can be reduced and mixed with the solidified material.

(7) In the conventional ground improvement machine 101, the solidification material discharge device 106 is disposed between the guide wheels 121A and 121B, and the discharge port 106a is closed by the guide wheels 21A and 21B. The solidified material was not discharged to the outside of 21A and 21B, and the solidified material could not be discharged to every corner of the orbital range 124A 'of the stirring blade 124A as shown by the hatched portion T1 in FIG. Mixing efficiency was poor. However, the ground improvement machine 1 of the first embodiment includes the solidification material discharging device 6 including the guide wheels 21A21B and the drive wheels 31A and 31A.
B and the guide wheels 21A, 21B.
B or the second guide wheels 31A, 31B are
The solidification material is not blocked by the orifice area 34A 'of the stirring blade 24A as shown by the hatched portion T2 in FIG.
And is mixed with the ground. Therefore, the mixing efficiency of the ground and the solidified material is improved.

(8) Since the stirring blades 124A and 124B of the conventional ground improvement machine 101 have only the cutter blade projecting toward the outer periphery, no gap can be formed around the discharge port 106a, and the solidified material Was difficult to discharge. Further, it was difficult to uniformly mix the earth and sand and the solidified material by the stirring blades 24A and 24B. However, in the ground improvement machine 1 of the first embodiment, in addition to the first cutter blade K1 in which the stirring blades 24A and 24B protrude toward the outer periphery and are parallel to the chain,
Since the second cutter blade K2, which protrudes toward the inner circumference and is perpendicular to the chain, is provided, the cutter blade K2 passes through the soil, and the ground around the discharge port 6a, which is the ground inside the chains 23A and 23B. Create a gap in the outlet 6
The solidified material is easily discharged from a. Further, by stirring the discharged solidified material and earth and sand around the discharge port 6a by the inner cutter blade K2, more complete mixing can be performed.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 7A is a front view of the second embodiment, and FIG. 7B shows the orbital range 24A ′ of the stirring blade 24A and the pull-out resistance surface 7 ′ of the joint 7 as viewed from above. In the present embodiment, those denoted by the same reference numerals as those of the ground improvement machine 1 shown in the first embodiment have the same configuration and operation. This embodiment has substantially the same configuration as the first embodiment, and therefore only different configurations and operations will be described. In the above-described first embodiment, the side plates 8A and 8B are configured as a structure via the center holding member 33 and the support member 36. However, in the second embodiment, the side plates 8A and 8B are formed.
8B is not configured as a structure, only the center holding member 33 is configured as a structure.

The ground improvement machine having such a configuration is as follows.
Since the ground improvement machine is supported only by the center holding member 33, the weight can be reduced and the size can be reduced more than in the first embodiment because the support member 36 is not provided.
Therefore, when the ground is to be improved in a narrow place or on a ground whose construction base is soft, the ground improvement machine of the second embodiment may be used. Also, the pull-out resistance surface 7 '(FIG. 7 (b)) of the coupling portion 7 according to the second embodiment is larger than the pull-out resistance surface 36' (FIG. 2 (b)) of the support member 36 of the first embodiment. Is narrower, the pull-out resistance is reduced, and the working efficiency can be improved.

Next, a third embodiment of the present invention will be described. FIG. 8 is a front view of the third embodiment. In the present embodiment, components denoted by the same reference numerals as those in the first embodiment have the same configuration and operation. In the present embodiment, the side plates 8A and 8B are configured as a structure via the support member 36, and the middle holding member 33 is not configured.
The rotating shaft 13 and the horizontal frame 19 are directly attached to the side plates 8A and 8B. Such two-sided holding type ground improvement machines having no middle holding member 33 include chains 23A and 23A.
Since there is almost no gap between the center lines of the ground improvement machines of the stirring blades 24A and 24B installed on the ground B, and there is no improvement, the tine type stirring blade 3 as shown in the first embodiment is not used.
4, 35 are not provided.

The ground improvement machine having such a configuration is as follows.
Since the center holding member 33 is not formed, the width between the guide wheels can be narrowed and slim. For example, the width of the soil improvement machine of the first embodiment is 1050 mm, and the width of the soil improvement machine of the third embodiment is 1000 mm. Therefore,
When the ground improvement is performed in a narrow place, the ground improvement machine of the third embodiment may be used. Further, the ground improvement machine of the present embodiment does not include the tine-type stirring blades 34 and 35, so that the driving force can be saved.

Next, a fourth embodiment of the present invention will be described. FIG. 9 is a front view of the fourth embodiment, and FIG.
10 is a sectional view taken along the line AA of FIG. In the present embodiment, components denoted by the same reference numerals as those in the first embodiment have the same configuration and operation. In the first embodiment, the lower ends of the support frames 20A and 20B are straightened, and the first shaft center 38 is rotatably held at the lower ends. Guide wheels 21A and 21B are fixed to the first shaft center 38.
However, in the present embodiment, as shown in FIG. 10, the support frames 50A, 50A
B, 60A and 60B are formed. Support frames 50A, 50
One ends of B, 60A and 60B are attached to support frames 20A and 20B. Support frames 50A, 50B, 60A, 60
At the other end of B, a first axis 38 and a second axis 39 are rotatably held. Support frames 50A, 50B, 60A, 6
OB is fixed to the support frames 20A and 20B with the same predetermined angle and the same length. Guide wheels 21A, 21
The first axis 38 of B and the second axis 39 of the second guide wheels 31A and 31B are located in parallel. Support frames 60A, 60B
And the guide wheels 21A and 21B are mounted on the shaft,
Since the chains 23A, 23B can be prevented from contacting the motor cover 37, the auxiliary wheels 27A, 27B
May not be provided.

The ground improvement machine having such a configuration is as follows.
The guide wheels 21A and 21B and the second guide wheels 31A and 31B receive the same resistance. Therefore, since no load is applied to one of the support frames, the ground improvement machine is less likely to fail.

It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made. For example,
Although the fourth embodiment has been described based on the first embodiment, this may be applied to the second embodiment or the third embodiment.

[0066]

As described above, in the ground improvement machine of the present invention, the ground improvement machine is mounted on the tip of the backhoe arm.
A ground improvement machine that agitates the ground with the stirring blades by driving underground a chain provided with stirring blades having a cutter blade formed on the outer periphery and being stretched between a driving wheel and an induction wheel. , A structure holding driving wheels, and a structure
At the lower end of the support frame that bifurcates, and one that bifurcates
First shaft center rotatably held at the lower end of one support frame
Rotatable at the lower end of the other support frame
A second axis that is held and parallel to the first axis and a first axis
A guide wheel is fixed, and a second guide wheel is fixed to the second axis.
The chain is formed by the guide wheel and the second guide wheel.
Since it is stretched horizontally, it is possible to improve the horizontal without unevenness to every corner without leaving the improved reference surface, and to improve the working efficiency.

The ground improvement machine according to claim 1, wherein
A motor for driving the drive wheels, and the motor and the drive wheels.
Chains to be connected are arranged in multiple rows on the outer peripheral surface of the chain.
Since it is provided in the guide of the stirred blade, the chain box is provided in the track of the stirring blades arranged in multiple rows on the outer peripheral surface of the chain, eliminating unmodified parts and reducing penetration resistance. Thereby, work efficiency can be improved.

The ground improvement machine according to claim 1, wherein
Since the solidified material discharge device that discharges the solidified material into the ground is provided between the guide wheel and the second guide wheel, the discharge port of the solidified material discharge device is not blocked by the guide wheel. The solidified material can be discharged to every corner of the orbit range, and the mixing efficiency of the ground and the solidified material is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a ground improvement machine according to a first embodiment of the present invention mounted on a main body.

FIG. 2A is a front view of the ground improvement machine according to the first embodiment of the present invention, and FIG. 2B is a diagram illustrating a track range of a stirring blade and a pull-out resistance surface of a support member viewed from above.

FIG. 3 is a sectional view taken along the line AA of FIG. 2;

FIG. 4 is a right side view of FIG. 2;

FIG. 5 is an enlarged view of a stirring blade.

FIG. 6 is a diagram showing a state where an improved bottom surface of the ground improvement machine works on an improved reference plane.

FIG. 7 (a) is a front view of a ground improvement machine according to a second embodiment of the present invention, and FIG. 7 (b) shows a track range of the stirring blade 24 viewed from above and a pull-out resistance surface of a connection portion.

FIG. 8 is a front view of a ground improvement machine according to a third embodiment of the present invention.

FIG. 9 is a front view of a ground improvement machine according to a fourth embodiment of the present invention.

FIG. 10 is a side view of FIG. 9;

FIG. 11 is a perspective view in which a conventional ground improvement machine is mounted on a main body.

FIG. 12 is a front view of a conventional ground improvement machine.

FIG. 13 is a right side view of FIG.

FIG. 14 is a diagram showing a state in which an improved bottom surface of a conventional ground improvement machine works on an improved reference plane.

15 (a) is a bottom view of FIG. 12, and FIG. 15 (b) is a bottom view of the ground improvement machine of FIG. 2.

[Explanation of symbols]

 Reference Signs List 1 ground improvement machine 4 arm 5 tip 8A, 8B side plate 10 drive motor 12A, 12B drive wheel 15 chain 21A, 21B guide wheel 23A, 23B chain 24A, 24B stirring blade 31A, 31B second guide wheel 33 center holding member 34, 35 Tine type impeller 40A, 40B

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-143980 (JP, A) JP-A-9-316868 (JP, A) JP-A-8-311859 (JP, A) JP-A-7- JP-A-8-144262 (JP, A) JP-A-54-69710 (JP, U) JP-A-4-53828 (JP, U) JP-A-57-75058 (JP, U) 54-68403 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) E02D 3/12 102

Claims (5)

(57) [Claims] 1. A backhoe mounted on an end of an arm of a backhoe.
A ground improvement machine that agitates the ground with the stirring blades by driving underground a chain provided with stirring blades having a cutter blade formed on the outer periphery and being stretched between a driving wheel and an induction wheel. A structure holding the drive wheel, a support frame branched into two branches at the lower end of the structure, and a rotatable lower end of one of the support frames branched into two branches.
Rotatable at the held first axis and at the lower end of the other bifurcated support frame
A second axis that is held and is parallel to the first axis, and the guide wheel is fixed to the first axis, and the second axis is
, A second guide wheel is fixedly provided, and the chain is horizontally stretched between the guide wheel and the second guide wheel. Wherein a motor for driving the front Symbol driving wheels,
The ground improvement machine according to claim 1 , wherein a chain connecting the motor and the drive wheel is provided in a guide of a plurality of rows of stirring blades on an outer peripheral surface of the chain. . 3. The ground improvement machine according to claim 2, wherein a machine frame supporting a drive shaft of the motor is provided in a rail guide of a plurality of rows of stirring blades on an outer peripheral surface of the chain. A ground improvement machine characterized by the following. 4. The solidifying material discharge device for discharging the solidified material in the ground plate is provided in the middle of the said inductive wheel second induction wheels, solidifying material discharge range ejected from the solidified material discharge device stirring Discharged to every corner of the wing orbit range
The ground improvement machine according to claim 1 . 5. The ground improvement machine according to claim 1, wherein the agitating blade protrudes toward an outer periphery, a first cutter blade parallel to the chain, and protrudes toward an inner periphery, and is perpendicular to the chain. A ground improvement machine comprising a second cutter blade.