JPH11152740A - Ground modifying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ground modifying machine to improve agitatingly mixing property between a solidifying material and an object to be modified in the modifying treatment of a ground and treatment quality and prevent breakage of a chain and a solidifying material force-feed pipe. SOLUTION: A drive sprocket 19 is rotated through rotation of a drive shaft by a driving motor, a chain 24 is rotated, and intrusion of boulder stones and gravels is prevented by a foreign matter-prevention cover 26 and a second foreign matter-prevention cover 28. The solidifying material filtered by a filter device, is ejected in treatment earth through the ejection port of a protruded nozzle. The solidifying material and earth to be modified are agitated and mixed by a plurality of agitating blades 25 and cutting blades 45, fixed on the outer surface of the chain 24. A pair of protruded plates are arranged on the back side of the agitating blade 25, whereby untreated earth does not adhere to the inside of the chain 24.

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 for improving the ground by stirring and mixing soil and a solidified material such as powder or milk while digging to form a foundation for a structure or the like.

[0002]

2. Description of the Related Art Conventionally, as a ground improvement machine, as shown in FIG. 20, a base machine 201 in which a trencher 203 is attached to a tip of an arm 202 of a base machine 201 is known.
In this ground improvement machine 200, as shown in FIG. 21, a drive shaft 205 that is rotationally driven by a motor 204 is mounted between a left plate 203a and a right plate 203b of a trencher 203, and a pair of drive sprockets is mounted on the drive shaft 205. 206
Are mounted, and a pair of left and right support frames 207 is attached to lower ends of the left side plate 203a and the right side plate 203b. A lower end of the pair of support frames 207 has a rotating shaft 20.
8 are respectively mounted on shafts, and driven sprockets 209 are mounted on the rotation shafts 208, respectively.

As shown in FIG. 22, an endless chain 210 is wound between the driving sprocket 206 and the driven sprocket 209. Further, as shown in a partially enlarged view of the chain 210 shown in FIG. 23, a large number of stirring blades 211 are arranged in the chain 210, and the drive sprocket 206 is rotated by the rotation of the motor 204, so that the chain 210 is rotated. It is rotated, and many stirring blades 21
1 is configured to excavate and stir the ground.

Further, as shown in FIG. 21, along the right side plate 203b of the trencher 203,
12 is provided, and the tip of the solidified material pumping pipe 212
As shown in FIG. 1 and FIG. 24, a projecting nozzle 213 formed in an inverted T-shape is formed, and the projecting nozzle 213 has a large number of discharge ports 215 through which the solidified material is discharged. Further, as shown in FIG. 25, the shape of the distal end portion of the solidified material pressure feeding pipe 212 is a horizontal type projecting nozzle 214 formed horizontally.
In some cases. Also in this case, a large number of discharge ports 216 are formed in the horizontally projecting nozzle 214.

[0005]

However, in the conventional ground improvement machine 200 described above, boulders and small gravel are entangled between the driving sprocket 206 and the chain 210 of the trencher 203 and between the driven sprocket 209 and the chain 210. Damaged 210 or chain 210
There was a problem that came off.

In the conventional ground improvement machine 200, as shown in FIG.
7 is rigidly fixed, so that the chain 210
There is also a problem that the chain 210 is broken or the chain 210 is easily detached.

[0007] Further, untreated soil or the like in which the solidified material is not agitated at the time of ground improvement work adheres to the inside of the chain 210, and the adhered soil peels off during the work, and the untreated soil becomes untreated soil. There was a problem that remains.

Further, in the conventional ground improvement machine 200,
When a soil having a low water content and a high viscosity is mixed, only the portion of the trencher 203 that contacts the agitating blade 211 is shaved, and the other soil remains in the form of a solid mass, which causes poor mixing between the solidified material and the soil. There was a problem of getting up.

In the conventional ground improvement machine 200, a feeder hose 219 (not shown) shown in FIG.
Is supplied to the protruding nozzle 213 via the
The solidified material solidified in the pressure feeding hose 219 is clogged at the discharge port 215 of the protruding nozzle 213, causing a quality variation and a work loss. further,
In the case of deep layer improvement or the like, the solidified material may completely block the discharge port 215 of the protruding nozzle 213 as described above, and may cause the pressure-feeding hose 219 to rupture because of the long penetration.

Accordingly, an object of the present invention is to attach a foreign matter prevention cover to prevent a boulder, small gravel or the like from being entangled between a sprocket and a chain, and to prevent damage to the chain and detachment of the chain. .

Another object of the present invention is to keep the chain stretched at all times so that the chain does not come off.

Another object of the present invention is to prevent the untreated soil from adhering to the inside of the chain so that the untreated soil is not mixed in during the ground improvement.

Another object of the present invention is to enhance the stirring effect on any soil.

Further, the present invention stabilizes the quality of the solidified material discharged from the protruding nozzle, increases the efficiency of stirring the solidified material and the treated soil, prevents the discharge port from being clogged, and improves the pressure feeding hose. The purpose is to prevent rupture.

[0015]

According to a first aspect of the present invention, there is provided a trench improvement for a ground improvement machine, comprising: a driving sprocket provided on an upper portion of a frame and rotated by a motor; A driven wheel rotatably provided at a lower portion of the frame, a chain wound between the driving sprocket and the driven wheel, and having a plurality of stirring blades attached thereto, and provided near the driven wheel. A solid material discharge port and a foreign matter preventing cover provided near the driven wheel and for preventing boulders or gravel from entering between the driven wheel and the chain are provided.

In the ground improvement machine having the above structure, the driving sprocket is rotationally driven by the motor, and the chain wound between the driving sprocket and the driven wheel is rotated by the rotation of the driving sprocket to improve the plurality of stirring blades. The target soil is agitated, and the solidified material discharged from the solidified material discharge port is stirred into the improvement target soil. Here, the foreign matter prevention cover prevents stones and gravel from entering between the driven wheel and the chain.

According to the second aspect of the present invention, in addition to the configuration of the first aspect, the trencher is provided near the driving sprocket, and boulders and gravel are provided between the driving sprocket and the chain. The cover is provided with a foreign matter prevention cover for preventing the foreign matter from entering. Therefore, in the ground improvement machine having this configuration, the foreign matter prevention cover prevents the entry of boulders or gravel between the driven wheel and the chain,
The second foreign matter prevention cover prevents the entry of boulders and gravel between the drive sprocket and the chain.

Further, according to a third aspect of the present invention, in addition to the configuration of the ground improvement machine according to the first or second aspect, the driven wheel is a driven sprocket or a driven idler. In the present invention, regardless of whether the driven wheel is a driven sprocket or a driven idler,
The foreign matter prevention cover can prevent boulders and gravel from being entangled.

According to a fourth aspect of the present invention, there is provided the trencher for a ground improvement machine, comprising: a driving sprocket provided at an upper portion of a frame and rotated by a motor; and a driven wheel rotatably provided at a lower portion of the frame. A chain wound around the drive sprocket and the driven wheel and having a plurality of stirring blades attached thereto, a solidified material discharge port provided near the driven wheel, the drive sprocket and the driven wheel And a chain tensioner provided between the front and rear sides of the frame to apply tension to the chains.

In the ground improvement machine having this structure, the driving sprocket is rotated by the motor, and the rotation of the driving sprocket rotates the chain wound between the driving sprocket and the driven wheel, thereby improving the plurality of stirring blades. The target soil is agitated, and the solidified material discharged from the solidified material discharge port is stirred into the improvement target soil. Here, chain tensioners provided on the front side and the rear side of the frame respectively apply tension toward the outside of the chain.

Further, the invention according to a fifth aspect is characterized in that, in addition to the configuration according to the fourth aspect, the chain tensioner is formed of a leaf spring.

With this configuration, the chain can always be maintained in a stretched state, and fine adjustment can be easily performed.

The invention described in claim 6 is the same as the invention in claim 5
In addition to the configuration of the invention described in (1), the leaf spring applies tension to the chain at a plurality of locations. With this configuration, tension is reliably applied to the chain, and loosening of the chain can be reliably prevented.

Further, the trencher of the ground improvement machine according to the present invention is provided with a driving sprocket provided on an upper portion of a frame and rotated by a motor, and a driven wheel rotatably provided on a lower portion of the frame. A chain wound around the drive sprocket and the driven wheel and having a plurality of stirring blades attached thereto; a solidified material discharge port provided near the driven wheel; and a rear side of the stirring blade. And a projection member provided.

In the ground improvement machine having this configuration, the driving sprocket is rotationally driven by the motor, and the rotation of the driving sprocket rotates the chain wound between the driving sprocket and the driven wheel, thereby improving the plurality of stirring blades. The target soil is agitated, and the solidified material discharged from the solidified material discharge port is stirred into the improvement target soil. Here, the protrusion member provided on the back side of the stirring blade removes untreated soil adhered to the inside of the chain.

In the trencher for a ground improvement machine according to the present invention, a driving sprocket provided on an upper portion of a frame and rotated by a motor, and a driven wheel rotatably provided on a lower portion of the frame are provided. A pair of left and right chains wound around the drive sprocket and the driven wheel and having a plurality of stirring blades attached thereto; and a solidified material discharge port provided near the driven wheel. Each of the chains is provided with a flat cutting blade having an angle between the stirring blades and the longitudinal direction of the chain.

With this configuration, when the chain is rotated, a plurality of agitating blades agitate the soil to be improved, and the solidified material discharged from the solidified material discharge port is stirred into the soil to be improved. However, since the soil to be improved is agitated, the mixing property of the solidified material can be improved with respect to the soil to be improved having a high tackiness.

According to the ninth aspect of the present invention, in addition to the configuration of the eighth aspect, the cutting blades provided in each of the chains are alternately formed in a C-shape or an inverted C-shape. It is characterized by being arranged facing each other so as to form a character shape.

[0029] With this configuration, the stirring efficiency can be further improved for soil with high tackiness.

According to the tenth aspect of the present invention, in the ground improvement machine according to the present invention, a driving sprocket provided on an upper portion of the frame and rotated by a motor; a driven wheel rotatably provided on a lower portion of the frame; A chain wound between a driving sprocket and the driven wheel and having a plurality of stirring blades attached thereto, a solidified material discharge port provided near the driven wheel, and a solidified material to the solidified material discharge port And a filter device for filtering the solidified material from the solidified material supplied to the solidified material discharge port.

According to this configuration, the solidified material filtered by the filter device is filtered, and the solidified material filtered without clogging the solidified material discharge port is discharged into the treated soil from the solidified material discharge port and attached to the chain. The plurality of stirring blades stir the improvement target soil, and the solidified material discharged from the solidification material discharge port is stirred into the improvement target soil.

According to an eleventh aspect of the present invention, in addition to the configuration of the tenth aspect, the filter device includes a detachable filter member.

According to this configuration, the filter can be replaced detachably.

[0034]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a ground improvement machine according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a drawing showing the overall configuration of a ground improvement machine 1 that stirs and mixes a solidified material into the ground (improvement soil) while excavating the ground.

As shown in FIG. 1, a ground improvement machine 1 is an improved machine main body (backhoe) 2 which can be self-propelled by a crawler 5.
A rotatable arm 3 extends from the arm 3, and a trencher 4 is attached to a tip of the arm 3. In addition, as a solidifying material, cement, lime, etc. are used, and these powdery or milky materials are used.

Next, the structure of the trencher 4 will be described with reference to FIG.
This will be described with reference to FIG. FIG. 2 is a front view of the trencher 4, and FIG. 3 is a left side view of the trencher 4.

As shown in FIG. 2, the trencher 4 has horizontal rods 9, 10, 1 between the right side plate 7 and the left side plate 8 of the frame 6.
1 is suspended horizontally, and the vertical rods 12, 1
3 are suspended, and horizontal rods 14 and 15 are suspended at the lower ends of the vertical rods 12 and 13. A drive shaft 16 is disposed above the horizontal rod 9 between the right and left plates 7 and 8. Are vertically mounted on the right side plate 7 and the left side plate 8.

The drive shaft 16 is provided above the left side plate 8.
A drive motor 17 for rotating the drive shaft 17 is mounted, and a drive shaft of the drive motor 17 is connected to a left end of the drive shaft 16.

Further, a pair of drive sprockets 18 and 19 are fixed to the drive shaft 16, and
Rotatable driven sprockets 20, 21 are pivotally mounted on the lower end of the shaft 3 so as to face the driving sprocket.

In the vicinity of the right side plate 7 of the trencher 4,
A solidified material pumping pipe 22 is provided along the right side plate 7,
The solidified material pressure feed pipe 22 is bent from a position facing the lower end of the right side plate 7 and extends between the vertical rods 12 and 13. A horizontally provided protruding nozzle 23 is attached to the lower end of the solidified material pressure feeding pipe 22.

Further, an endless chain 24 is wound between the driving sprocket 19 and the driven sprocket 21, as shown in FIG.
An endless chain (not shown) similar to the chain 24 is wound between the sprocket 19 and the driven sprockets 20 and 21. In the present embodiment, the driven sprockets 20, 21
However, instead of the driven sprockets 20 and 21, a toothless driven idler may be used, or one may be a driven sprocket and the other may be a driven idler.

As shown in FIG. 3, a large number of stirring blades 25 are arranged on the outer peripheral surface of each of the chains 24 and a chain (not shown). The structure of the stirring blade 25 will be described later.

As shown in FIG. 3, at the lower end of the vertical rod 12, a foreign matter preventing cover 26 is provided between the driven sprocket 21 and the chain 24 for preventing the entry of boulders or gravel. The foreign matter prevention cover 26 has a lower portion formed in an arc shape along the outer peripheral surface of the driven sprocket 21. Both ends of the foreign matter prevention cover 26 allow foreign matter to enter between the driven sprocket 21 and the chain 24. Plate-like foreign matter intrusion prevention plates 26a, 26b to be prevented are fixed along the chains 24, respectively. Further, as shown in FIG. 2, the lower end of the vertical
A foreign matter prevention cover 27 similar to 6 is provided.

Further, as shown in FIG. 3, on the upper end of the vertical rod 12, a second foreign matter preventing cover 2 for preventing the entry of boulders or gravel between the driving sprocket 19 and the chain 24 is provided.
8 are provided. This second foreign matter prevention cover 28
The upper part is formed in an arc shape along the outer peripheral surface of the drive sprocket 19. As shown in FIG. 2, a second foreign matter prevention cover 29 similar to the second foreign matter prevention cover 28 is also provided at the upper end of the vertical rod 13.

As shown in FIG. 3, a chain tensioner 3 is provided in front of the vertical rod 12 (right side in FIG. 3).
In addition, a chain tensioner 31 symmetrical to the chain tensioner 30 is also provided on the rear side (the left side in FIG. 3) of the vertical rod 12. The chain tensioners 30 and 31 will be described with reference to FIG.

FIG. 4 is an enlarged view of the chain tensioner 30. As shown in FIG. 4, the chain tensioner 30
Are four leaf springs 32a, 32b, 32 having different lengths.
The members c and 33d are tightened by the tightening member 33 to be integrated. Further, as shown in FIG. 5, the binding members 33 are rotated by the rotation of the chain 24.
The holding portion 36 that supports the shaft 5 is integrally tightened with the leaf springs 32a to 32d.

FIG. 5 is a front view of the holder 36 and the idlers 34 and 35 as viewed from the right in FIG. The idlers 34 and 35 are rotatably held by the holder 36.

As shown in FIG. 4, the upper end of the longest leaf spring 32a is wound and supported by a support shaft 37, and the lower ends of the leaf springs 32a, 32b and 33c are
It is swingably held by a slit 38 a of a holder 38 provided at the lower end of the vertical rod 12.

Next, the binding member 33 will be described with reference to FIG. FIG. 6 is a sectional view of the binding member 33.
The binding member 33 is a leaf spring receiving member 33a having a substantially U-shaped cross section.
And the flat lid member 33b are connected to the bolts 39a, 39b,
39c, 39d, the leaf spring 32
a, 32b, 32c, and 32d are integrally fixed.

FIG. 7 is a view of the idler 35 viewed from below shown in FIG. The idler 35 is rotatably supported by a shaft 40 provided on the holding unit 36.

FIG. 8 is a sectional view of the idler 35 shown in FIG. As shown in FIG. 8, the shaft is supported by the shaft portion 40, and a bearing 4 is provided between the shaft portion 40 and the idler 35.
1 is provided. The other idlers 34 and the like have the same structure.

The chain tensioner 31 is also formed symmetrically with the chain tensioner 30.
The structure is the same as that of the above-described chain tensioner 30, and the description is omitted.

Here, at the upper end of the trencher 4,
As shown in FIG. 2, a mounting portion 42 for fixing to the lower end of the backhoe 2 is fixed.

As shown in FIG. 9, a coil spring 43 may be used instead of a plate spring for the chain tensioner 30.

Next, FIG. 10, FIG. 11, FIG. 12, FIG.
The configuration of the stirring blade 25 will be described with reference to FIG.

FIG. 10 is a front view of the chain 24 to which the stirring blade 25 is fixed. FIG. 11 is a view of the stirring blade 25 viewed from the longitudinal direction of the chain 24. FIG. 12 is a perspective view of the stirring blade 25.

As shown in FIGS. 10 to 12, the stirring blade 25
Are fixed on the chain 24 so as to be perpendicular to the longitudinal direction of the chain 24. As shown in FIG. 12, the stirring blade 25 is vertically raised at both ends of a flat plate 25a to form vertical plates 25b, respectively, and is formed in a substantially U-shaped cross section. The stirring blade 25 is formed of a steel plate.

Next, as shown in FIG. 12, on the back surface of the stirring blade 25, a pair of left and right protruding plates 44 are parallel to the longitudinal direction of the stirring blade 25 in order to scrape untreated soil adhered to the inside of the chain 24. It is stuck to.

Next, the cutting blade 13 will be described with reference to FIGS. FIG. 13 is a diagram showing a state in which the stirring blades 25 and the cutting blades 45 are alternately arranged on a pair of left and right chains 24, 24. FIG. 14 is a perspective view of the cutting blades 45.

In this embodiment, a case where a plurality of stirring blades 25 are arranged as shown in FIG. 10 has been described.
As in the modified example of the stirring blade shown in FIG.
The cutting blade 45 may be provided.

As shown in FIG. 14, the cutting blade 45 is mounted on a flat plate 46 fixed in a direction perpendicular to the longitudinal direction of the chain 24 with respect to the longitudinal direction of the chain 24.
It is fixedly formed as a flat plate having an inclined angle.

As shown in FIG. 13, the cutting blades 45 are arranged in the longitudinal direction of the
And are arranged alternately. Also, this cutting blade 45
The right and left pairs of chains 24 are arranged in parallel so as to face each other, and the inclination angles of the blades are configured to be symmetrical between the opposite left and right sides. Or, they are alternately arranged in an inverted C shape.

Next, the filter device 47 will be described in detail with reference to FIG. 1 and FIGS. As shown in FIG. 1, a filter device 47 is provided above the trencher 4.

The filter device 47 will be described with reference to FIGS. FIG. 15 shows the filter device 4.
7 is a perspective view, and FIG. 16 is an exploded perspective view of the filter device 47.

As shown in FIGS. 15 and 16, the filter device 47 is configured such that a funnel-shaped bottom 49 is fixed to the bottom of a cylindrical housing 48, and the solidified material feeding pipe 22 is provided at the center of the funnel-shaped bottom 49. Is fixed. A detachable disk-shaped lid 50 is provided on the upper part of the housing 48, and the solidified material pressure feeding pipe 2 is provided at the center of the lid 50.
2 is fixed. A filter 51 formed in a cylindrical shape with a wire mesh is detachably housed inside the housing 48. The size of the eyes of this filter 51 is
It is selected so that the solidified material can be removed. That is, if the size of the filter 51 is smaller than the size of the discharge port of the protruding nozzle, it is possible to prevent the discharge port from being clogged by the solidified solidified material.

When the filter device 47 is provided in the vicinity of the trencher 4, compared to the case where the filter device 47 is provided inside the trencher 4 or at a position away from the trencher 4,
It is always held vertically, does not hinder ground improvement work, and can also prevent damage and the like. Further, the filter device 47 is
The same applies to the case where the improved machine main body (backhoe) 2 is provided or in the vicinity thereof, and is always kept vertically, so that it does not hinder the ground improvement work and can also prevent damage and the like.

Next, a modification of the filter device will be described with reference to FIG. Filter device 5 shown in FIG.
2, a top cover 54 and a bottom cover 55 which are detachable from a cylindrical housing 53 are provided, a flat wire mesh 56 is provided inside the housing 53, and a wire mesh 5 is provided on a side surface of the housing 53.
The solidified material pressure feed pipes 22 are fixed to each other so as to sandwich the same.

Next, referring to FIG. 18 and FIG. 19, the filter device 47 in the case of the deep processing in which the solidified material is mixed in the deep layer.
Will be described.

As shown in FIG. 18, in the case of deep processing,
A swivel 57 is provided below the filter device 47.
The swivel 57 prevents the solidified material pumping pipe 22 from becoming entangled, and is configured such that the rotating shaft 57b can freely rotate with respect to the fixed shaft 57a. To prevent entanglement. That is, below the filter device 47, the solidified material
Since the swivel 57 is provided for preventing the entanglement of the solidified material, the torsion of the solidified material pumping pipe 22 can be prevented by the swivel 57 even in the case of deep ground improvement.

Specifically, as shown in FIG. 19, the filter device 47 and the swivel 57 are provided above a long deep layer solidified material pressurizing pipe 58. The filter device 47
The same is true even if a swivel 57 is provided above the.

Next, the operation of the ground improvement machine 1 of the present embodiment will be described.

When the solidified material is agitated and mixed with the soil to be improved, which is the object of the ground improvement processing, first, as shown in FIG.
Rotates the crawler 5 to move to the position of the soil 59 to be improved. The trencher 4 suspended from the lower end of the arm 3 of the backhoe 2 is inserted into the improvement target soil 59 from the lower end while rotating the chain 24. At this time, FIG.
The drive motor 17 shown in FIG. 1 rotates the drive shaft 16 to rotate the drive sprockets 18 and 19, and the drive sprocket 1
The chains 24 wound between the sprockets 8 and 19 and the driven sprockets 20 and 21 are rotated.

Here, between the driven sprockets 20, 21 and the chains 24, 24, foreign matter prevention covers 26, 2 are provided.
7 are respectively provided, the driven sprockets 20,
No boulders or gravel are entangled between 21 and the chains 24,24. Therefore, breakage of the chains 24, 24 or detachment of the chains 24, 24 can be prevented.

Further, between the drive sprockets 18, 19 and the chains 24, 24, the second foreign matter prevention cover 2 is also provided.
Since each of the gears 8 and 29 is provided, no boulders or gravel are entangled between the drive sprockets 18 and 19 and the chain 24. Therefore, breakage of the chains 24, 24 or detachment of the chains 24, 24 can be prevented.

Further, powdery or milky cement,
The solidified material such as lime is supplied from a feeder (not shown) to the protruding nozzle 23 through the solidified material pressurizing tube 22. As shown in FIG. 2, the solidified material pressurizing tube 2 near the trencher 4 is used.
2 is provided with the filter device 47, so that the solidified material solidified in the solidified material pressure feeding pipe 22 is filtered. Therefore, the quality of the solidified material can be improved, the discharge port of the protruding nozzle 23 can be prevented from being clogged, the working efficiency can be improved, and the solidified material pressure feeding pipe 22 can be prevented from bursting. Also, the filter device 47
Since the filter 51 is a detachable cartridge, the filter 51 can be easily cleaned and replaced. Also,
Even in the case of the filter device 52 shown in FIG. 17, the wire mesh 56 is detachable, so that cleaning and replacement are easy.

The solidified material filtered by the filter device 47 is discharged from the discharge port of the protruding nozzle 23 into the soil to be improved.

At this time, on the outer surface of the chain 24, a plurality of stirring blades 25 and cutting blades 45 are alternately provided in a plurality of rows, and the vertical plate 25b of the stirring blades 25 and the cutting blades 4 are arranged.
5 stirs the soil to be improved as the chain 24 rotates, whereby the solidified material and the soil to be improved are stirred and mixed.
Here, since a pair of projection plates 44 are provided on the back side of the stirring blade 25, the projection plates 44 rotate inside the chain 24 with the rotation of the chain 24.
Untreated soil does not adhere to the inside of the chain 24.
Therefore, during the ground improvement work, the untreated soil adhered to the inside of the chain 24 does not peel off, and the untreated soil does not remain in the treated soil.

Further, as shown in FIG. 13, the cutting blade 45 is
And are arranged alternately. Also, this cutting blade 45
The right and left pairs of chains 24 are arranged in parallel so as to face each other, and the inclination angles of the blades are configured to be symmetrical between the opposite left and right sides. Or, they are alternately arranged in an inverted C shape. Accordingly, as the chain 24 rotates, the soil to be improved is centered and outsided in the direction orthogonal to the longitudinal direction of the chain 24 as shown by the arrow in FIG. However, the mixing efficiency of the solidified material and the soil to be improved can be increased without causing poor mixing.

Further, the chain 24 includes leaf springs 32a,
Chain tensioner 3 composed of 32b, 32c, 32d
Since 0 and 31 are provided, tension can always be applied to the chain 24 even during ground improvement work. Further, since the chain tensioners 30, 31 are provided on both sides of the vertical rods 12, 13, tension can be reliably applied to the chains 24, 24. As shown in FIG. 4, the chain tensioners 30 and 31 include leaf springs 32.
aBecause the upper end is pivotally supported by the support shaft 37 and can swing,
The deformation of the chain 24 can be sufficiently followed. The chain tensioners 30 and 31 are provided with idlers 34 and
Since each is provided with 35, the chain 24 can be securely held and tension can be applied.

Further, as shown in FIG. 19, in the case of the ground improvement processing of the deep layer, since the swivel 57 is provided below the filter device 47, the solidified material accompanying the rotation of the solidified material feeding pipe 58 for the deep layer is provided. The entanglement of the pressure feed pipe 58 can be prevented.

The present invention is not limited to the above-described embodiment and modifications, and it goes without saying that various modifications are possible.

For example, in the above embodiment, the left and right chains 24 are provided as a pair, but it goes without saying that the present invention can be applied to a case where one chain or three or more chains 24 are provided.

The material of the solidified material is not limited to cement or lime, and it goes without saying that various materials can be used.

[0085]

In the ground improvement machine according to the first aspect of the present invention, the foreign matter preventing cover can prevent boulders or gravel from entering between the driven wheel and the chain, so that the chain is damaged or the chain is damaged. Can be prevented from coming off.

According to the second aspect of the present invention, the foreign matter preventive cover prevents entry of boulders or gravel between the driven wheel and the chain, and the second foreign matter preventive cover allows the drive sprocket and the chain to be connected to each other. Rocks and gravel are prevented from entering the space. Therefore, the effect of preventing breakage or detachment of the chain can be enhanced.

Further, in the ground improvement machine according to the third aspect of the present invention, in addition to the effects of the ground improvement machine according to the first or second aspect, the driven wheel may be either a driven sprocket or a driven idler. In addition, the foreign matter prevention cover can prevent rocks and gravel from getting entangled.

In the ground improvement machine according to the fourth aspect of the present invention, the chain tensioners provided on the front side and the rear side of the frame respectively apply tension to the chains outward. Therefore, the chain can always be kept in a stretched state, and loosening and detachment of the chain can be prevented. Further, fine adjustment is also possible.

In the ground improvement machine according to the fifth aspect of the present invention, in addition to the effect of the fourth aspect, the chain tensioner is constituted by a leaf spring.
The structure is simple and robust, and the durability can be improved.

In the ground improvement machine according to the sixth aspect of the present invention, in addition to the effect of the fifth aspect, the leaf spring can apply tension to the chain at a plurality of locations. Thus, tension is reliably applied to the chain, and loosening of the chain can be reliably prevented.

In the ground improvement machine according to the seventh aspect of the present invention, the projecting member provided on the back side of the stirring blade can remove untreated soil adhered to the inside of the chain. The untreated soil can be prevented from peeling off from the back side of the chain and remaining in the treated soil.

In the ground improvement machine according to the present invention, the cutting blade further stirs the soil to be improved in addition to the stirring blade at the time of the ground improvement work, so that the soil to be treated having a high tackiness can be removed. As a result, the mixing property of the solidified material can be improved.

Further, in the ground improvement machine according to the ninth aspect of the present invention, in addition to the effect of the eighth aspect, the cutting blades provided in each of the chains are alternately formed in a V-shape. Or, since it is arranged so as to have an inverted C shape, the soil to be improved can be alternately shifted inward and outward in the direction orthogonal to the chain, so that On the other hand, the stirring efficiency can be further improved.

The ground improvement machine according to the tenth aspect of the present invention includes the filter device for filtering the solidified material from the solidified material supplied to the solidified material discharge port, so that the filter device is solidified. The solidified material is filtered, and the solidified material that has been filtered without the solidified material discharge port being clogged is discharged from the solidified material discharge port into the soil to be improved, thereby preventing the discharge port from being clogged and the solidified material pumping pipe from bursting. . In particular, when a filter device is provided near the solidified material discharge port, near the trencher, or at or near the body of the ground improvement machine, the filter device does not hinder ground work or break.

Further, in the ground improvement machine according to the eleventh aspect, in addition to the effects of the tenth aspect,
Since the filter device is a detachable filter member,
Cleaning and replacement of the filter member can be easily performed.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a ground improvement machine according to an embodiment of the present invention.

FIG. 2 is a front view of a trencher used in the ground improvement machine of one embodiment of the present invention.

FIG. 3 is a left side view of a trencher used in the ground improvement machine according to the embodiment of the present invention.

FIG. 4 is an enlarged view of a chain tensioner used for a trencher used in the ground improvement machine of one embodiment of the present invention.

FIG. 5 is a front view of a holding portion of the chain tensioner.

FIG. 6 is a sectional view of a binding member of the chain tensioner.

FIG. 7 is a view of the idler of the chain tensioner as viewed from below.

FIG. 8 is a sectional view of the idler.

FIG. 9 is a diagram showing a modification of the chain tensioner.

FIG. 10 is a front view of a stirring blade fixed to a chain of the ground improvement machine according to the embodiment of the present invention.

FIG. 11 is a view of the stirring blade viewed from a longitudinal direction of a chain.

FIG. 12 is a perspective view of the stirring blade.

FIG. 13 is a front view showing a modified example of the stirring blade.

FIG. 14 is a perspective view of a cutting blade fixed to a chain of the ground improvement machine according to the embodiment of the present invention.

FIG. 15 is a perspective view of a filter device of the ground improvement machine of one embodiment of the present invention.

FIG. 16 is an exploded perspective view of the filter device.

FIG. 17 is a perspective view showing a modification of the above-described filter device.

FIG. 18 is a front view of a swivel used for a deep ground improvement machine according to another embodiment of the present invention.

FIG. 19 is a view showing a deep ground improvement machine according to another embodiment of the present invention.

FIG. 20 is a side view of a conventional ground improvement machine.

FIG. 21 is a front view of a trencher of a conventional ground improvement machine.

FIG. 22 is a side view of a trencher of a conventional ground improvement machine.

FIG. 23 is an enlarged view of a chain of a conventional ground improvement machine.

FIG. 24 is a front view of a protruding nozzle of a conventional ground improvement machine.

FIG. 25 is a front view showing another example of the projecting nozzle of the conventional ground improvement machine.

[Explanation of symbols]

Reference Signs List 4 Trencher 6 Frame 7 Right side plate 8 Left side plate 17 Drive motor 18 Drive sprocket 19 Drive sprocket 20 Follower sprocket 21 Follower sprocket 22 Solidified material feed pipe 23 Projection nozzle 24 Chain 25 Stirrer blade 26, 27 Foreign matter prevention cover 28, 29 Second Foreign matter prevention cover 30, 31 Chain tensioner 32a, 32b, 32c, 33d Leaf spring 34, 35 Idler 44 Projecting plate 45 Cutting blade 47 Filter device 51 Filter 56 Wire mesh 57 Swivel

Claims (11)

[Claims] 1. A driving sprocket provided on an upper portion of a frame and rotated by a motor, a driven wheel rotatably provided on a lower portion of the frame, and wound around the driving sprocket and the driven wheel. ,
A chain having a plurality of agitating blades attached thereto, a solidified material discharge port provided near the driven wheel, and provided near the driven wheel, and boulders and gravel are provided between the driven wheel and the chain. A ground improvement machine having a trencher, comprising: a foreign matter prevention cover for preventing entry. 2. The trencher is provided in the vicinity of the drive sprocket, and prevents a boulder or gravel from entering between the drive sprocket and the chain.
The ground improvement machine according to claim 1, further comprising a foreign matter prevention cover. 3. The ground improvement machine according to claim 1, wherein the driven wheel is a driven sprocket or a driven idler. 4. A driving sprocket provided on an upper portion of a frame and rotated by a motor, a driven wheel rotatably provided on a lower portion of the frame, and wound around the driving sprocket and the driven wheel. ,
A chain having a plurality of stirring blades attached thereto, a solidified material discharge port provided near the driven wheel, and a front side and a rear side of the frame provided between the driving sprocket and the driven wheel. A ground improvement machine having a trencher, comprising: a chain tensioner for applying tension to the chain. 5. The ground improvement machine according to claim 4, wherein the chain tensioner is formed of a leaf spring. 6. The ground improvement machine according to claim 5, wherein the leaf spring applies tension to the chain at a plurality of locations. 7. A drive sprocket provided on an upper portion of a frame and rotated by a motor, a driven wheel rotatably provided on a lower portion of the frame, and wound around the drive sprocket and the driven wheel. ,
A trench having a plurality of stirring blades attached thereto, a solidified material discharge port provided in the vicinity of the driven wheel, and a projection member provided on the back side of the stirring blade. Ground improvement machine having. 8. A drive sprocket provided on an upper portion of the frame and rotated by a motor, a driven wheel rotatably provided on a lower portion of the frame, and wound around the drive sprocket and the driven wheel. ,
A pair of left and right chains having a plurality of stirring blades attached thereto; and a solidified material discharge port provided near the driven wheel. Each of the chains has a longitudinal length of the chain between the stirring blades. A ground improvement machine having a trencher, comprising flat cutting blades having an angle inclined with respect to a direction. 9. The cutting blades provided in each of the chains are arranged so as to face each other so as to alternately form a C-shape or an inverted C-shape.
The ground improvement machine according to 1. 10. A drive sprocket provided on an upper portion of a frame and rotated by a motor, a driven wheel rotatably provided on a lower portion of the frame, and wound around the drive sprocket and the driven wheel. ,
A trencher provided with a chain having a plurality of stirring blades attached thereto, a solidified material discharge port provided in the vicinity of the driven wheel, and a solidified material pumping pipe for supplying a solidified material to the solidified material discharge port; And a filter device for filtering a solidified material from the solidified material supplied to the solidified material discharge port. 11. The ground improvement machine according to claim 10, wherein the filter device includes a detachable filter member.