JP3096019B2 - Trenchers for ground improvement machines - 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 for improving the ground by stirring and mixing soil and a solidified material such as powder or milk while excavating to form a foundation for a structure or the like.

[0002]

2. Description of the Related Art Conventionally, as a ground improvement machine 100, as shown in FIG.
Is known in which a trencher 103 is attached to the tip of a. As shown in the front view of the trencher 103 shown in FIG. 12, the ground improvement machine 100 includes a drive motor 10 between a left side plate 103a and a right side plate 103b of the trencher 103.
4, a drive shaft 105 is rotatably driven, and a pair of drive sprockets 106 and 107 are mounted on the drive shaft 105.
Is mounted, and a support frame 108 is attached to lower end sides of the left side plate 103a and the right side plate 103b. A lower frame 109 is fixed to a lower end portion of the support frame 108, and a non-rotatable fixed cylinder shaft 110 is mounted on the lower frame 109.
A rotatable rotary drum 111 is externally fitted. Further, a pair of left and right driven idlers 112 and 113 are mounted on the outer peripheral surface of the rotating drum 111.

FIG. 13 is a left side view of the trencher 103. As shown in FIG.
An endless chain 114 is wound between the driven idler 6 and the driven idler 112. An endless chain similar to the chain 114 is wound between the driving sprockets 106 and 107 and the driven idlers 112 and 113. A plurality of stirring blades 115 are provided on the outer peripheral surface of the chain 114.

As shown in FIG. 12, a driving gear 104a of the driving motor 104 and a driven gear 1 of a driving shaft 105 are provided.
A drive chain (not shown) is wound between the drive chain 05a.

Here, by the rotation of the drive motor 104,
The drive shaft 105 is rotated, and the drive sprockets 106 and 107 mounted on the drive shaft 105 are respectively rotated. By the rotation of the drive sprockets 106 and 107, the chains 114 and 114 are rotated, and the driven idler is driven. 112 and 113 are rotated. Therefore, the driven idler 1
The rotating drum 111 on which the solidification materials 12 and 113 are mounted is rotated, and the solidified material pumped by the solidified material pressure feeding pipe 116 is discharged from the nozzles 117 and 118 into the soil to be improved. The mixture is stirred and mixed by the stirring blade 115.

[0006]

However, in the above-mentioned conventional ground improvement machine 100, since the nozzle from which the solidified material is discharged is provided between the driven idler 112 and the driven idler 113, the solidified material is an object to be improved. There was a problem that it was not widely stirred and mixed in the soil.

Further, in the conventional ground improvement machine 100, since the driven idlers 112 and 113 are used, the driven idlers 112 and
13 may slip and the rotating drum 111 on which the driven idlers 112 and 113 are mounted may not be rotated, and there is a problem that the solidified material is not diffused well.

Further, the fixed cylinder shaft 110 and the rotating drum 11
1 and the solidified material wraps around the rotating drum 11
1 could not be rotated well, and the diffusion of the solidified material could not be widened.

Therefore, an object of the present invention is to enable the solidified material discharged from the nozzle to be widely diffused in the soil to be improved.

Another object of the present invention is to prevent the driven idler from slipping and sufficiently rotate the rotary drum.

Another object of the present invention is to prevent the solidified material from flowing between the fixed cylinder shaft and the rotary drum.

[0012]

In order to achieve the above object, a trench improving machine trencher according to the present invention is provided on an upper portion of a frame, and includes a pair of driving sprockets rotated by a motor. A non-rotatable fixed cylinder shaft provided at a lower portion of the frame, a rotation cylinder shaft rotatably fitted to the fixed cylinder shaft, a pair of driven wheels fixed to an outer periphery of the rotation cylinder shaft, and A chain each wound between a sprocket and the driven wheel and having a plurality of stirring blades attached thereto, a solidified material pumping pipe connected to one end of the fixed cylinder shaft, and an outer peripheral surface of the fixed cylinder shaft And a nozzle having a base opening that is fixed to the outer peripheral surface of the rotary cylinder shaft and that is opposed to the opening of the fixed cylinder shaft once during one rotation of the rotary cylinder shaft. an induction trough provided, on the driven wheels Through hole for passing the solidifying material is formed
And that it is.

In the ground improvement machine having the above structure, the driving sprocket is rotated 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. Stir the target soil. Here, the solidified material is pressure-fed from the solidified material pressure feed pipe into the fixed cylinder shaft, the rotation of the driven cylinder is rotated by rotation of the driven wheel, and the base of the nozzle fixed to the outer peripheral portion of the rotation cylinder shaft. When the opening faces the opening formed on the outer peripheral surface of the fixed cylinder shaft, the solidified material is supplied into the nozzle and discharged from the tip of the nozzle into the soil to be improved. At this time, since the guide gutter is provided on the outer periphery of the nozzle, the solidified material can be surely stirred and mixed into the soil to be improved. Also before
The solidified material discharged from the nozzle is guided to an induction gutter,
Discharge from the through hole formed in the driven wheel to the outside of the driven wheel
It is.

According to a second aspect of the present invention, in addition to the structure of the first aspect,
The guide gutter is fixed to the nozzle on the rotation direction side of the rotary cylinder shaft. With this configuration, since the guiding gutter rotates in the soil to be improved before the tip of the nozzle, a void is formed in the soil, so that the solidified material discharged from the tip of the nozzle is transmitted through the guiding gutter, and the tip of the guiding gutter is formed. Since it is more discharged, it is certainly diffused and mixed into the soil to be improved, and is surely mixed above the width of the trencher.

Further, in the trencher for a ground improvement machine according to the third aspect of the present invention, in addition to the configuration according to the first or second aspect, the guide gutter is parallel to a center axis of the rotary cylinder shaft. It is configured to extend in the direction. With this configuration, the guide gutter rotates in the soil to be improved in parallel with the rotary cylinder axis, so that the solidified material discharged from the tip of the nozzle is transmitted through the guide gutter and discharged from the guide gutter tip, so Is diffused and mixed into the soil to be improved.

According to a fourth aspect of the present invention, in addition to the configuration of the first or second aspect of the invention, the guide gutter is provided with respect to a center axis of the rotary cylinder shaft. It has a configuration characterized by being spirally curved. According to this configuration, since the guide gutter is spirally curved with respect to the rotary cylinder axis and the center axis, the guide gutter rotates with a spirally formed curve in the soil to be improved. The solidified material discharged from the tip of the nozzle is spirally discharged, and is discharged in the same direction as the discharge at the tip of the nozzle at the discharge of the guide gutter, so that the solidified material is reliably stirred and mixed into the soil to be improved.

Further, in the trencher for a ground improvement machine according to the invention described in claim 5, in addition to the configuration of the invention described in claim 1, the guide gutter rotates the rotary cylinder shaft with respect to the nozzle. It is fixed to the direction side and the side opposite to the rotation direction. With this configuration, since the nozzle is configured to be sandwiched between the guide gutters from both sides, in both the normal rotation and the reverse rotation, the solidified material discharged from the tip of the nozzle passes between the two guide gutters. It is surely stirred and mixed into the soil to be improved.

Further, in the trencher for a ground improvement machine according to a sixth aspect of the present invention, in addition to the configurations of the second to fifth aspects, the guide gutter extends to the outside of the driven wheel. The configuration is characterized by that. With this configuration, the solidified material discharged from the tip of the nozzle is
It is guided by the guide gutter and diffused outside the driven wheel.

Further, in the trencher for a ground improvement machine according to the invention of claim 7 , in addition to the constitution of the invention of claims 1 to 6 , one of the driven wheels is a driven sprocket and the other is a driven sprocket. One is a driven idler. With this configuration, the driven wheel does not slip with respect to the rotation of the chain, and the rotary cylinder shaft is always reliably rotated.

[0020] In the trencher for a ground improvement machine according to the invention of claim 8 , in addition to the constitution of the invention of claims 1 to 6 , both of the driven wheels are driven sprockets. The configuration is as follows. With this configuration, it is possible to reliably prevent the driven wheel from slipping against the rotation of the chain, and the rotary cylinder shaft is always reliably rotated.

According to a ninth aspect of the present invention, in addition to the configuration of the first to eighth aspects of the present invention, in addition to the configuration of the first to eighth aspects, an outer peripheral surface of the fixed cylindrical shaft and an inner circumferential surface of the rotary cylindrical shaft are provided. The configuration is such that an air seal is performed with the peripheral surface. With this configuration, the air seal prevents the solidified material from flowing around between the outer peripheral surface of the fixed cylinder shaft and the inner peripheral surface of the rotary cylinder shaft.

According to a tenth aspect of the present invention, in addition to the configuration of the ninth aspect, an air outlet for an air seal is provided on an outer peripheral surface of the fixed cylindrical shaft. The configuration is provided.

With this configuration, air is blown out from the air seal outlet provided on the outer peripheral surface of the fixed cylinder shaft, and an air seal is formed between the outer peripheral surface of the fixed cylinder shaft and the inner peripheral surface of the rotary cylinder shaft. In addition, the solidified material is prevented from flowing around.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A trench improving machine trencher according to an embodiment of the present invention will now be described with reference to the drawings.

FIG. 1 is a drawing showing the overall configuration of a ground improvement machine 1 that agitates 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 body (backhoe) 3 which can be driven by a crawler 2 by itself.
A rotatable arm 4 extends from the arm 4, and a trencher 5 is attached to a tip of the arm 4. 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 5 will be described with reference to FIG.
This will be described with reference to FIG. FIG. 2 is a front view of the trencher 5.

As shown in FIG. 2, the trencher 5 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
The lower frame 3 is fixed to the lower ends of the vertical rods 12 and 13.

An upper frame 15 is fixed to an upper portion of the frame 6. A drive motor 16 is attached to the left side wall 15a of the upper frame. Also,
Above the horizontal rod 9 between the right side plate 7 and the left side plate 8 of the frame 6, a drive shaft 17 is vertically mounted on the right side plate 7 and the left side plate 8.

The drive shaft 16a of the drive motor 16
A gear 16b is fixed to the left end of the drive shaft 17, and a gear 17a is also fixed to the left end of the drive shaft 17. And the gear 16
A drive chain 18 is stretched between the gear b and the gear 17a as shown in FIG.

Further, a pair of drive sprockets 19 and 20 are fixed to the drive shaft 17. FIG.
As shown in the left side view of the trencher 5, a driven sprocket 24 described below is provided at the lower end of the vertical rod 12.
A chain 44 is wound between the driving sprocket 19 and the driven sprocket 24, and a plurality of stirring blades 46 are arranged in the chain 44. As shown in FIG. 2, a chain 45 similar to the chain 44 is wound between the driving sprocket 20 and the driven idler 25.

Next, the structure inside the lower frame 14 will be described with reference to FIG. FIG. 4 shows the lower frame 1
FIG. 4 is an enlarged view of FIG.

A fixed cylindrical shaft 21 fixed non-rotatably between the left side wall 14a and the right side wall 14b of the lower frame 14.
And a rotatable rotary drum (rotating cylinder shaft) 22 which is fitted around the fixed cylinder shaft 21 and is rotatable. The fixed cylinder shaft 2
A bearing 23 is provided between the rotating drum 1 and the rotating drum 22 to rotatably hold the rotating drum 22.

A driven sprocket 24 and a driven idler 25 are fixed to the outer peripheral surface of the rotating drum 22. The driven sprocket 24 has a through hole 24a, and the driven idler 25 has a through hole 25a.

Further, a cylindrical hollow hole 26 through which the solidifying material is fed is formed in the fixed cylindrical shaft 21.
A pipe joint 28 to which the solidified material pumping pipe 27 is connected is fixed to the right end of the pipe.

The lower portion of the fixed cylindrical shaft 21 has a through hole 2
9, 30 are formed side by side.
Nozzles 31, 32 bent at right angles are fixed to the outer peripheral surface of the rotary drum 22 with a displacement of 180 degrees and a displacement of a certain distance in the longitudinal direction of the rotary drum 22. The base opening 31a of the nozzle 31 once faces the through hole 29 of the fixed cylindrical shaft 21 during one rotation of the rotary drum 22, and the base opening 32a of the nozzle 32 also rotates during one rotation of the rotary drum 22. Once, it faces the through hole 30 of the fixed cylindrical shaft 21.

Further, the tip end 31b of the nozzle 31 opens leftward (as shown in FIG. 4) in parallel with the longitudinal direction of the rotating drum 22, and the tip end 32b of the nozzle 32 extends in parallel with the longitudinal direction of the rotating drum 22. And open rightward (in FIG. 4).

On the outer peripheral surface of the rotary drum 22, a guide gutter 33 for guiding the solidified material discharged from the tip end 31b of the nozzle 31 is driven by a driven sprocket parallel to the longitudinal direction (central axis direction) of the rotary drum 22. The guide gutter 34 extending to the outside of the nozzle 24 and guiding the solidified material discharged from the distal end port 32b of the nozzle 32 also extends to the outside of the driven idler 25 in parallel with the longitudinal direction (center axis direction) of the rotating drum 22. It has been extended.

Next, referring to FIG. 5 to FIG.
3 and 34 will be described. FIG. 5 is a sectional view taken along line AA ′ of FIG. FIG. 6 shows the guiding gutters 33 and 3.
FIG. 7 is a perspective view of a rotating drum 22 provided with the rotary drum 4, and FIGS. 7 and 8 are perspective views showing modified examples of the guide gutter.

As shown in FIG. 5 and FIG.
4 and 35, the rotary drum 2
2 are provided on the rotation direction side. Therefore, the nozzle is continuously rotated in the soil to be improved before the nozzles 31 and 32, and a gap is obtained in the soil. Therefore, the solidified material is surely guided in the direction of the arrow shown in FIG.

As in the modification of the guide gutter shown in FIG. 7, the guide gutters 38 and 39 are provided so that the nozzles 31 and 32 are sandwiched from both sides in the direction of rotation of the rotary drum 22 and the side opposite to the direction of rotation. May be provided in both. In this case, since the solidified material is guided between the guide gutters 38 and 39 provided on both sides, the guide gutter 3 is provided for both forward rotation and reverse rotation.
The solidified material is guided to the tip of 8, 39, and is surely stirred and mixed into the soil to be improved.

Further, as shown in FIG.
1 may be spirally curved with respect to the longitudinal direction (the direction of the central axis) of the rotating drum 22. In this case, since the solidified material is helically ejected in the longitudinal direction (center axis direction) of the rotary drum 22, the ejection direction at the time of the discharge of the guide gutter tip and the ejection of the nozzle tip become the same, and Since the liquid is surely discharged at the lower part of the frame at 180 degrees, it is widely and uniformly diffused in the soil to be improved.

Further, as shown in FIG.
Has an air supply hole 35 to which air for air seal is supplied.
Are formed in parallel with the longitudinal direction (center axis direction) of the fixed cylindrical shaft 21, and an air ejection hole 36 is formed at a tip end portion 35 a of the air supply hole 35.

As shown in the sectional view of the fixed cylinder shaft 21 shown in FIG. 9, an air supply hole 42 similar to the air supply hole 35 is formed on the fixed cylinder shaft 21 on the side opposite to the air supply hole 35. The air supply hole 42 has an air ejection hole 43 similar to the air ejection hole 36.

Incidentally, as shown in FIG.
In the vicinity of the right side plate 7, a solidified material pressure feeding pipe 27 is arranged along the right side plate 7.

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. 1, the improvement machine main body (backhoe) 3 constituting the base machine of the soil improvement machine 1 is a crawler. Rotate 2 to improve soil 4
Move to position 7. The trencher 5 suspended from the lower end of the arm 4 of the improvement machine main body (backhoe) 3 is inserted into the improvement target soil 47 from the lower end while rotating the chain 44. At this time, the drive motor 16 shown in FIG. 2 and FIG.
0 is rotated, and the chain 4 wound between the driving sprockets 19 and 20 and the driven sprockets 24 and 25, respectively.
4, 45 are rotated.

By the rotation of the chains 44 and 45, the driven sprocket 24 and the driven idler 25 shown in FIG. 4 are rotated. Here, as shown in FIG. 3, a plurality of rows of teeth 24b are provided on the outer periphery of the driven sprocket 24, so that the driven sprocket 24 does not slip by being firmly engaged with the chain 44. Therefore, the driven sprocket 2
The rotating drum 22 to which the fixing member 4 is fixed is reliably rotated.

Here, powdery or milky cement,
The solidified material such as lime is supplied from a supply device (not shown) to the hollow hole 26 in the fixed cylinder shaft 21 shown in FIG.
Is supplied to Then, the through-hole 29 of the fixed cylindrical shaft 21
When the base opening 31a of the nozzle 31 of the rotating drum 22 faces the solidified material, the solidified material is supplied into the nozzle 31 and the solidified material is discharged from the tip end 31b of the nozzle 31. At this time, since the guide gutter 33 is provided, the solidified material
3 and the through hole 2 of the driven sprocket 24
4a, the guide gutter 33 extending to the outside of the driven sprocket 24 is guided to the left end (see FIG. 4) of the guide gutter 33, discharged into the soil to be improved, and mixed by the stirring blades 46. Therefore, the solidified material is widely and sufficiently stirred and mixed in the soil to be improved.

When the rotary drum 22 rotates and the base opening 32 a of the nozzle 32 of the rotary drum 22 faces the through hole 30 of the fixed cylindrical shaft 21, the solidified material is supplied into the nozzle 32 and The solidified material is discharged from the distal end port 32b. At this time, since the guide gutter 34 is provided, the solidified material is guided along the guide gutter 34 and is driven by the driven idler 2.
5 is guided to the right end (see FIG. 4) of the guide gutter 34 extending to the outside of the driven idler 25 through the through hole 25a of the driven idler 25, and is discharged into the soil to be improved.
6 and mixed. Therefore, the solidified material is widely and sufficiently stirred and mixed in the soil to be improved.

Here, as in the modification of the guiding gutter shown in FIG. 7, the guiding gutters 38 and 39 are connected to the nozzle 31 or the nozzle 32.
Is provided on both the rotation direction side and the opposite side of the rotation direction of the rotary drum 22 so that the solidification material is sandwiched from both sides, since the solidified material is guided between the guide gutters 38 and 39 provided on both sides. The solidified material is guided to the tips of the guide gutters 38 and 39, and is reliably stirred and mixed into the soil to be improved.

Also, as shown in FIG.
In the case where 1 is helically curved with respect to the longitudinal direction (central axis direction) of the rotary drum 22, the solidified material is helically ejected in the longitudinal direction (central axis direction) of the rotary drum 22. Therefore, the discharge is performed in the same direction as the discharge of the guide gutter tip and the discharge of the nozzle tip, and the discharge is reliably performed at the lower part of the lower frame at 180 degrees.

Further, as shown in FIG.
May be inclined at a fixed angle in the longitudinal direction (center line direction) of the rotating drum 22.

Further, in the trencher 5 for the ground improvement machine 1 of the present embodiment, the air ejection holes 36 and 43 for blowing air for air sealing to the fixed cylindrical shaft 21 and the air ejection holes 3 are provided.
Since the air supply holes 35 and 42 for supplying air to the cylinders 6 and 43 are formed, the air ejected from the air ejection holes 36 and 43 performs an air seal between the fixed cylinder shaft 21 and the rotary drum 22. It is possible to prevent the solidified material from flowing through the through holes 29 and 30 of the fixed cylinder shaft 21 into the gap (the upper part of the circumference) between the fixed cylinder shaft 21 and the rotary drum 22. Further, since the through holes 29 and 30 of the fixed cylinder shaft 21 are formed only in the region below the circumference of the fixed cylinder shaft 21, the solidified material discharge range is limited to the region below the circumference of the fixed cylinder shaft 21 and the like. Is done. Therefore, make the lower frame to some extent (for example, about 50 cm)
Even when the solidified material is discharged while penetrating into the soil, the discharged solidified material and the associated dust do not scatter on the ground.

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

For example, in this embodiment, one of the driven wheels is a driven sprocket 24 and the other is a driven idler 25, but both driven wheels may be driven sprockets. In this case, there is an effect that slip between the chain and the driven wheel can be reliably prevented.

[0056]

The trencher for a ground improvement machine according to the first aspect of the present invention is provided with an induction gutter on the outer periphery of the nozzle for discharging the solidified material into the soil to be improved. The solidified material is guided and guided in the induction gutter, and is surely widely mixed in the soil to be improved. In addition, the driven wheel has a fixed
Since the through hole for passing the material is formed,
The solidified material discharged from the spill is guided by the guiding gutter and is driven
It is discharged from the through hole formed in the wheel to the outside of the driven wheel,
Widely diffused and mixed in the soil to be improved.

Further, in the trencher for a ground improvement machine according to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, in addition to the configuration, the guide gutter is disposed on the rotary cylinder shaft with respect to the nozzle. Since the guide gutter rotates in the soil to be improved before the tip of the nozzle, a void is formed in the soil, so that the solidified material discharged from the tip of the nozzle is securely fixed. Is guided in the guide gutter and diffused and mixed widely in the soil to be improved.

Further, in the trencher for a ground improvement machine according to the third aspect of the present invention, in addition to the effects of the first or second aspect, the guide gutter is parallel to a center axis of the rotary cylinder shaft. The solidified material discharged from the tip of the nozzle is guided in a direction parallel to the center axis direction of the rotary cylinder shaft, and is surely diffused and mixed into the soil to be improved.

Further, in the trencher for a ground improvement machine according to the invention described in claim 4, in addition to the effect of the invention described in claim 1 or 2, the guide gutter is provided with respect to a center axis of the rotary cylinder shaft. Since it is spirally curved, the solidified material discharged from the tip of the nozzle is guided by the spiral guiding gutter and is spirally discharged into the soil to be improved. The solidified material is discharged in the same direction as that at the time of the front end discharge, and is surely discharged at 180 degrees below the lower frame.

Further, in the trencher for a ground improvement machine according to the fifth aspect of the present invention, in addition to the effect of the first aspect, the guide gutter rotates the rotary cylinder shaft with respect to the nozzle. Since the nozzle is fixed to the direction side and the side opposite to the rotation direction, the nozzle is sandwiched between the guide gutters from both sides, and the solidified material discharged from the tip of the nozzle in both normal rotation and reverse rotation Is reliably stirred and mixed into the soil to be improved through the space between the two induction gutters.

In the trencher for ground improvement machinery according to the invention described in claim 6, in addition to the effects of the inventions described in claims 2 to 5, the guide gutter is extended to the outside of the driven wheel. Therefore, the solidified material discharged from the tip of the nozzle is guided by the guide gutter and diffused outside the driven wheel.

Further, in the trencher for a ground improvement machine according to the invention described in claim 7 , in addition to the effects of the inventions described in claims 1 to 6 , the driven wheel is one driven sprocket. The driven wheel does not slip with respect to the rotation of the chain, and the rotary cylinder shaft is always reliably rotated.

In the trencher for a ground improvement machine according to the invention of claim 8 , in addition to the effects of the inventions of claims 1 to 6 , the driven wheels are both driven sprockets. The driven wheel can be reliably prevented from slipping against the rotation of the chain, and the rotating cylinder shaft is always reliably rotated.

[0064] Further, the ground improvement machinery Torencha of the invention described in claim 9, in addition to the effect of the invention according to claims 1 to 8, the outer peripheral surface of the fixed cylindrical shaft and an inner periphery of the rotary cylinder shaft Since the air seal is performed between the surfaces, it is possible to prevent the solidified material from flowing around between the outer peripheral surface of the fixed cylinder shaft and the inner peripheral surface of the rotary cylinder shaft.

According to a tenth aspect of the present invention, in addition to the effects of the ninth aspect , in addition to the effects of the ninth aspect, an air outlet for an air seal is provided on the outer peripheral surface of the fixed cylindrical shaft. Air is blown out from the air seal outlet provided on the outer peripheral surface of the fixed cylinder shaft, so that an air seal is formed between the outer peripheral surface of the fixed cylinder shaft and the inner peripheral surface of the rotating cylinder shaft, and the The material can be prevented from wrapping around.

[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 lower frame of the trencher used in the ground improvement machine according to the embodiment of the present invention.

FIG. 5 is a sectional view of the rotary drum taken along line AA ′ of FIG. 4;

FIG. 6 is a perspective view of a guide gutter used in the trencher.

FIG. 7 is a perspective view of a modification of the guide gutter used for the trencher.

FIG. 8 is a perspective view of a modification of the guide gutter used for the trencher.

FIG. 9 is a sectional view of a fixed cylinder shaft used in the trencher.

FIG. 10 is a perspective view of the guide gutter when FIG. 8 is viewed in plan.

FIG. 11 is an overall configuration diagram of a conventional ground improvement machine.

FIG. 12 is a front view of a conventional trencher.

FIG. 13 is a left side view of a conventional trencher.

[Explanation of symbols]

 Reference Signs List 5 Trencher 6 Frame 7 Right plate 8 Left plate 16 Drive motor 18 Drive chain 19 Drive sprocket 20 Drive sprocket 21 Fixed cylindrical shaft 22 Rotary drum 24 Follower sprocket 25 Follower idler 27 Solidified material pressure feed pipe 31, 32 Nozzle 33, 34 Guidance gutter 35 Air supply hole 36 Air ejection hole 38, 39, 40, 41 Guide gutter 42 Air supply hole 43 Air ejection hole 44, 45 Chain 46 Stirrer blade

Continuation of the front page (56) References JP-A-9-250129 (JP, A) JP-A-7-158053 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F02D 3 / 12 F02F 5/06

Claims (10)

(57) [Claims] 1. A pair of driving sprockets provided at an upper portion of a frame and rotated by a motor, a non-rotatable fixed cylinder shaft provided at a lower portion of the frame, and rotatably fitted to the fixed cylinder shaft. A rotating cylinder shaft, a pair of driven wheels fixed to the outer periphery of the rotating cylinder shaft, a chain wound around each of the driving sprocket and the driven wheel, and having a plurality of stirring blades attached thereto; A solidified material pumping pipe connected to one end of the cylindrical shaft, an opening formed on the outer peripheral surface of the fixed cylindrical shaft, and fixed to the outer peripheral surface of the rotary cylindrical shaft, once at one rotation of the rotary cylindrical shaft; the nozzle has a base opening facing the opening of the fixed cylinder shaft, an induction gutter provided on the outer periphery of the nozzle, to the driven wheels, a through hole for passing the solidified material is formed
Soil improvement machine for Torencha characterized in that a possible are. 2. The trencher for a ground improvement machine according to claim 1, wherein the guide gutter is fixed to a rotation direction side of the rotary cylinder shaft with respect to the nozzle. 3. The trencher for a ground improvement machine according to claim 1, wherein the guide gutter extends in a direction parallel to a center axis of the rotary cylinder shaft. 4. The trencher for a ground improvement machine according to claim 1, wherein the guide gutter is spirally curved with respect to a center axis of the rotary cylinder shaft. 5. The ground improvement machine according to claim 1, wherein the guide gutter is fixed to the nozzle in a rotation direction side and a side opposite to the rotation direction of the rotary cylinder shaft. For trencher. 6. The trencher for a ground improvement machine according to claim 2, wherein the guide gutter extends to an outside of the driven wheel. 7. The driven wheel includes one driven sprocket.
And the other one is a driven idler.
A trencher for a ground improvement machine according to any one of claims 1 to 6. 8. A driven sprocket having two driven wheels.
The ground according to any one of claims 1 to 6, wherein
Trencher for improved machinery. 9. An outer peripheral surface of said fixed cylindrical shaft and said rotary cylindrical shaft.
It is characterized by performing air sealing between the inner peripheral surface
A trench for a ground improvement machine according to any one of claims 1 to 8,
. 10. An air seal on an outer peripheral surface of the fixed cylindrical shaft.
Wherein an air outlet for the nozzle is provided.
10. A trencher for a ground improvement machine according to item 9.