JPH0988116A - Excavating and kneading machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately supply cement group suspension in a space between an excavating blade and earth to be excavated, by using a driven sprocket and an endless excavating roller chain. SOLUTION: After a main column is vertically set, a drive sprocket 23 is rotated by a sprocket drive device so as to move a roller chain 30. Next, a movable support column 20 is lowered by a support column drive device so as to carry out excavation with the use of excavating blades 38A, bits and cutters 40, and further, cement group suspension is fed under pressure into a supply pipe 50. Accordingly, excavated earth and the cement group suspension are agitated and kneaded by the excavating blades 38A, the bits and the cutters 40 so as to obtain uncured soil cement. After completion of the excavation, when the pressure feed of the suspension is stopped while the movable support column 20 is raised, the soil cement is made to be uniformed as the column 20 is raised. Further, when all excavating blades, bits and cutters have been raised, the movement of the chain 30 is stopped. With the repetitions of the above-mentioned steps, a continuous sole cement wall is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substantially rectangular shape obtained by kneading soil and cement-based suspension generated by excavation of a land for in-situ in piping work for water and sewerage, foundation work for buildings, etc. The present invention relates to an excavating and kneading machine that forms a soil cement wall (soil retaining wall).

[0002]

2. Description of the Related Art An excavating and kneading machine for forming a substantially rectangular soil cement wall is disclosed, for example, in Japanese Utility Model Publication No. 4-34205. In such an excavating and kneading machine, the land is excavated by an excavating blade attached to an endless roller chain whose upper end is supported by a drive sprocket and whose lower end is supported by a driven sprocket and is transported by a drive device for driving a drive sprocket. Is something
The soil generated by excavating the land and the cement-based suspension supplied through the supply pipe of the excavating kneader are kneaded by the excavating blade, etc. A flat soil cement wall having a wall width of the length up to the excavating blade attached to the transfer side and a wall thickness of the excavating blade is formed.

[0003]

In the excavating and kneading machine of the above-mentioned publication, the lower end of the supply pipe for supplying the cement-based suspension is arranged along one side of the driven sprocket formed of a steel plate. The discharge port is directed toward one side of the endless roller chain at one side of the driven sprocket (specifically, the back of the excavating blade protruding sideways from the one side link plate that constitutes the endless roller chain). It is open. Therefore, on the other side of the driven sprocket,
The cement-based suspension is not properly supplied between the excavating blade and the non-excavating soil, and the problem that the excavating blade is not cooled properly and the excavation-promoting effect of the cement-based suspension (effect of weakening the non-excavating soil) are sufficient. There was a problem that I could not expect.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its main purpose is to provide a cement-based suspension using a specially shaped driven sprocket and an endless excavating roller chain. The purpose of the present invention is to provide an excavating kneading machine that can accurately supply between the excavating blade and the non-excavating soil. Is a drilling and kneading machine that forms a substantially rectangular soil cement wall, which is a main pillar that can be transported and installed substantially vertically on the ground, and a pillar driving device that is vertically movable assembled to this main pillar. A movable strut that is moved up and down, a pair of driven sprockets that are rotatably attached to the lower end of the movable strut at predetermined axial intervals, and a sprocket drive device that is rotatably attached to the upper part of the movable strut. A drive sprocket that is rotationally driven and a drive roller that sequentially engages with this drive sprocket are provided between the link plates, and a pair of driven rollers that sequentially engage with each of the driven sprockets is provided between the link plates and outside the drive roller. And an endless excavating roller chain which is provided coaxially with the excavating blade on the link plate and is wound around the driving sprocket and the driven sprocket to be transferred, and is disposed in a space between the driven sprocket and downward. A supply pipe having a discharge port that opens toward the end is provided along the movable column, and the cement-based suspension is pressure-fed from the supply port provided at the upper end.

In the above construction, a cutter for excavating by rotating integrally with the driven sprockets is attached to the outer peripheral portions of the outer walls of the both driven sprockets, and the excavating blades are attached to the rollers of the endless excavating roller chain. It is desirable to arrange them together on the outside, and further to provide an agitator, which is driven to rotate by the endless excavating roller chain, on the movable column above the driven sprocket.

[0006]

In the excavating and kneading machine according to the present invention, the drive sprocket is rotationally driven by the sprocket drive device to transfer the endless excavating roller chain in a state where the main column is installed substantially vertically at a desired position on the land for construction. Along with the start of excavation by the excavating blade, the movable prop is lowered by the strut driving device, and when the cement suspension is pumped to the supply pipe, the excavating blade excavates the ground and the soil generated by excavating. And the cement-based suspension are agitated and kneaded to produce unsolidified soil cement.
Further, when the pumping of the cement-based suspension is stopped and the movable strut is raised by the strut driving device after the predetermined amount of excavation is completed, the soil cement described above is mainly stirred by the excavating blade according to the rise of the movable strut. It is kneaded and homogenized. At this time, it is also possible to replenish the cement-based suspension by appropriately pressure-feeding it. In addition, when all the excavating blades rise to the ground, the rotation of the drive sprocket by the sprocket drive device is stopped to stop the transfer of the endless excavating roller chain, and an unsolidified soil cement wall is formed in the ground. . It is also possible to stop the rotational drive of the drive sprocket by the sprocket drive device when the predetermined amount of excavation is completed.

The soil cement wall formed as described above has a wall width which is the length from the digging blade provided on the lower transfer side of the endless digging roller chain to the digging blade provided on the upper transfer side, and Is the wall thickness, and a substantially rectangular and flat soil cement wall is formed. Also,
It is possible to construct a continuous soil cement wall by repeatedly executing the above-described construction, which is one cycle, at predetermined intervals.

By the way, in the excavating and kneading machine according to the present invention, as the driven sprockets, a pair of driven sprockets rotatably assembled at the lower end of the movable column at predetermined axial intervals is adopted, and as an endless excavating roller chain. , A drive roller that sequentially engages the drive sprocket is provided between the link plates, and a pair of driven rollers that sequentially engages each driven sprocket is provided outside the link plates coaxially with the drive roller. An endless excavating roller chain that is installed on the link plate and wound around the driving sprocket and the driven sprocket is transferred, and the discharge port of the supply pipe through which the cement-based suspension is pumped is located in the space between both driven sprockets. Because it is placed and opens downwards, the cementitious suspension is a pair of driven slides. Without deviation in digging edge and a non-drilling earthen through between the drive roller space and the endless digging roller chain between the rocket it is adequately supplied. Therefore, the digging blade is cooled accurately, the life of the digging blade can be improved, and the digging promotion effect of the cement-based suspension can be expected sufficiently, so that the digging efficiency is improved. Also, when excavating, part of the soil excavated by the excavating blade (may be mixed with pebbles, etc.) can pass through the space between the drive rollers of the endless excavating roller chain and between both driven sprockets. Therefore, it is possible to reduce the excavation resistance, which also improves excavation efficiency.

Further, in the excavating and kneading machine according to the present invention,
When a cutter for rotating and excavating integrally with the driven sprockets is attached to the outer peripheral portion of the outer walls of both driven sprockets, this cutter can also perform the excavation stirring and kneading in the same manner as the excavating blade, resulting in a uniform and smooth wall surface. The wall thickness of the soil cement wall (the wall thickness of the length obtained by adding the width of the cutter to the width of the excavating blade) can be changed by exchanging with a cutter with a different blade width as well as forming a different soil cement wall. The wall thickness of the soil cement wall can be easily changed and set. Also, when the excavating blade is arranged outside in conformity with each roller of the endless excavating roller chain, it is possible to prevent the excavating blade from closing the gap between the driving rollers in the endless excavating roller chain, and to eliminate the gap between the driving rollers. It can be sufficiently secured, and the above-mentioned cement-based suspension and excavated soil can be satisfactorily passed through the gap between the drive rollers. Furthermore, when an agitator that is driven to rotate by an endless excavating roller chain is provided on the movable column above the driven sprocket, the soil cement is also agitated and kneaded by this agitator to make the soil cement more homogeneous than the above. As the wall is formed, it is possible to prevent the endless excavation roller chain from swinging.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show an excavator kneader 100 according to the present invention assembled to a heavy machine A with a track, and the excavator kneader 100 is in a state of being tilted to the heavy machine A (the tiltable portion is clockwise in FIG. 1). It is assembled so that it can be transported even when it is tilted by approximately 90 degrees. The excavating and kneading machine 100 is composed of a main column 10 assembled to the frame A1 of the heavy machine A, a movable column 20, an endless excavating roller chain 30, a cutter 40, a supply pipe 50 and the like assembled to the main column 10. A pair of left and right outriggers B (one of which is not shown) is attached to the rear portion of the frame A1 of the heavy equipment A.

The main pillar 10 is capable of undulating at the tip of the frame A1 of the heavy machine A via a bracket assembly 60, tiltable in the left-right direction (vertical direction in the plane of FIG. 1), and rotatable about the longitudinal axis S. The outrigger B is attached and installed substantially perpendicular to the ground G by the outrigger B attached to the lower end, and can be transported by the heavy machine A even in the standing state of FIG. Bracket assembly 6
Reference numeral 0 denotes a bracket 62 that is rotatably assembled to a bracket A2 fixed to the tip of the frame A1 of the heavy machine A through a pin 61, and a bracket 62 that is rotatably assembled to the bracket 62 through a pin 63. It is configured by a sleeve 64 that rotatably supports 10 around the longitudinal axis S, and a bracket 65 that is integrally assembled to the sleeve 64. Between the bracket 62 and the bracket 65, a bracket is provided with respect to the bracket 62. A hydraulic cylinder C1 for pivoting the main pillar 10 in the left-right direction by rotating the 65 and the sleeve 64 around the pin 63 is interposed, and the main pillar 10 is provided between the bracket 65 and the bracket 11 assembled to the main pillar 10. A hydraulic cylinder C2 for rotating the cylinder about the longitudinal axis S is interposed. A hydraulic cylinder C3 for undulating the main column 10 is interposed between the frame A1 of the heavy machine A and a sleeve 19 rotatably attached to an intermediate portion of the main column 10.
The operation of each hydraulic cylinder C1, C2, C3 is performed by the heavy equipment A.
It can be controlled in the operation room.

Further, a pair of left and right guide rails 12 and a pair of left and right guide arms 13 for moving the movable column 20 along the main column 10 are assembled to the main column 10. The pair of left and right guide rails 12 are fixed to the front side of the main pillar 10 and extend from the upper part to the lower end as shown in FIG. A stopper 12a that restricts movement is provided. As shown in FIGS. 1 and 3, the pair of left and right guide arms 13 are vertically movably assembled to the pair of left and right guide rails 12 and are connected to each other by a bracket 14.

The movable support column 20, as shown in FIG.
A pair of left and right guides 21 provided on the rear surface of the upper portion on the pair of left and right guide rails 12 of the main pillar 10 and, as shown in FIGS. Support rail drive device 70 that is vertically movably assembled to the pair of left and right guide arms 13 that are assembled to the main pillar 10 by the guide rail 22 of FIG.
It is designed to be moved up and down by. Further, as shown in FIGS. 1 and 2, a cover 29 that covers the upper portion of the endless excavating roller chain 30 is detachably attached to the upper portion of the movable support column 20, and the lower end of the cover 29 is on the ground G. The cover 29 is to be removed when deeply excavating until it comes into contact with. Further, at the lower ends of the pair of left and right guide rails 22, there are provided engaging members 22a that engage with the pair of left and right guide arms 13 assembled to the main pillar 10 from below and lift them.

The column driving device 70 includes the pulling wire 7
1, a winch 72 for rewinding and rewinding this, a pulling down wire 73, and a winch 7 for rewinding and rewinding this
4 and a wire 7 at a winch 74.
The movable support column 20 can be moved downward by winding 3 and rewinding the wire 71 with the winch 72, and is movable by winding the wire 71 with the winch 72 and rewinding the wire 73 with the winch 74. Prop 20
Can be moved up. The pull-up wire 71 is fixed at one end to the upper part of the main column 10 and is attached to the upper end of the movable column 20 by a pulley P1 and pulleys P2 and P3 assembled at the upper end of the main column 10 and an intermediate part between the main columns 10. The winch 72 is wound around a winch 72 via a roller (not shown) attached to the back of the sleeve 19 attached to the main pillar 10, and the pulling-down wire 73 is fixed to the upper part of the movable column 20 at one end. Pulley P4 and main pillar 10 assembled in
It is wound around the winch 74 via the pulley P5 attached to the middle part of the.

The endless excavating roller chain 30 is shown in FIGS.
As shown in FIG. 7, it is an excavation means for excavating the ground, carrying out soil, and making a hole, and also for stirring and kneading soil cement. And a pair of drive sprockets 23 (see FIG. 1) which are rotatably mounted on the upper part of the movable column 20 in a stacked manner in the axial direction so as to be rotatable and are driven by the sprocket driving device 80.
A pair of driven sprockets 24 rotatably attached to the lower end of the shaft through a rotary shaft 25 with a predetermined axial gap (see FIGS. 1 and 2).
And FIG. 8). The distance between the rotating shafts of the drive sprocket 23 and the driven sprocket 24 can be adjusted by a shim plate 26 that is interposed so that the lower part of the movable support column 20 can be divided into upper and lower parts. Three pairs of chain steady rest guides 27 (Figs. 2 and 9) assembled between the sprocket 23 and the driven sprocket 24 so that the length of the movable support column 20 can be adjusted.
The tension of the endless excavating roller chain 30 can be adjusted by the reference (see).

Further, the endless excavating roller chain 30 is
As shown in detail in FIGS. 6 and 7, a pair of inner link plates 33 and a pair of outer link plates 34 assembled by a connecting pin 31 having a small diameter at both ends and a pair of holding bolts 32 fixed to both ends thereof. , A cylindrical bush 35, a driving roller 36, and a pair of driven rollers 37, which are sequentially engaged with the driving sprocket 23 by the driving roller 36 provided between the link plates and provided outside the link plates. A pair of driven rollers 37 sequentially engages each driven sprocket 24, and a flange 33 a provided at one end of each inner link plate 33 has a flange 33 a.
Further, as shown in FIG. 5, three types of excavating blades 38A, 38B, 38C for reducing excavation resistance and a bit 39 for increasing excavation efficiency and soil compatibility are sequentially attached. Each drilling blade 38A, 38B, 38C and bit 39
Is arranged outside the endless excavation roller chain 30 so as to match the drive roller 36, the pair of driven rollers 37, etc., and a sufficient gap is secured between the drive rollers 36. If the soil to be excavated has a soft soil, the bit 39 may be omitted.

The sprocket drive device 80 is a motor with a reducer that can be controlled in the operating room of the heavy equipment A.
2, the drive sprocket 23 is coaxially assembled to the upper portion of the movable support column 20 so as to rotate the drive sprocket 23. The drive sprocket 23 is rotated clockwise in FIG. The endless excavating roller chain 30 is transferred in the direction of the arrow in FIGS.

The cutter 40 is shown in FIGS. 1, 2, 8 and 10.
As shown in FIG. 12, the driven sprockets 24 are integrally attached to the outer peripheral portions of the outer side walls of the driven sprockets 24 by using bolts 44 so as to be detachable and replaceable. The rotating blades 38A, 38B, 3 of the endless excavating roller chain 30 described above
Similar to 8C, the base plate 41 is for excavating, stirring, and kneading, and is fitted to 22 U-shaped holders 24a fixed to the outer peripheral portion of the outer wall of the driven sprocket 24 at equal intervals in the circumferential direction, and the base plate 41. It is constituted by a holding plate 42 integrally fixed to one side and having a tip 43 at the tip. In the example shown in FIG. 2, the cutter 40 is assembled to the U-shaped holder 24a every other piece, but this assembly method can be changed as appropriate, and the cutter 40 can be mounted on all U-shaped holders 24a. Assembling,
Alternatively, it is possible to assemble two cutters 40 in the U-shaped holder 24a. Further, the cutter 40 has a blade thickness dimension of the tip 43 (dimension in the plate thickness direction of the holding plate 42).
Various cutters of different types are prepared and can be replaced as appropriate.

As shown in FIGS. 2, 13 and 14, the supply pipe 50 is arranged along the side surface of the movable support column 20 and is arranged in the space between the driven sprockets 24 and is arranged downward. It has a discharge port 51 opening toward the front, and the cement-based suspension is pumped from a supply port 52 provided at the upper end. As shown in FIG. 2, the discharge port 51 is arranged on the lower transfer side of the endless excavating roller chain 30 while being displaced by a predetermined amount. The supply pipe 50 is shown in FIG.
And the expandable portion shown in FIG. 14, in which the expandable portion has an upper large diameter pipe 53 and a lower small diameter pipe 54.
Is assembled so as to be liquid-tight and movable up and down by a required amount via a seal ring 55, and is expanded and contracted in accordance with the adjustment of the distance between the rotation axes of the drive sprocket 23 and the driven sprocket 24.

Further, in this embodiment, as shown in FIGS. 2, 3, 15 and 16, an agitator 90 is provided on the movable column 20 above the driven sprocket 24. The stirrer 90 is a pair of support arms 91 assembled to the movable support column 20 so that the length thereof can be adjusted, and a pair of rotatably assembled to the tip of the support arms 91 to engage with the drive rollers 36 of the endless excavating roller chain 30. The sprocket 92 and three stirring blades 93 that are fixed to the outer sides of the both sprockets 92 and rotate integrally with each other. The sprocket 92 and the stirring blades 93 are formed by the transfer of the endless excavating roller chain 30. It is designed to be rotated.

In the excavating and kneading machine 100 of this embodiment configured as described above, the main pillar 10 in which the movable support column 20 is lifted in advance is placed in the heavy machine A at a desired position on the land where the soil cement wall W is applied. Each hydraulic cylinder C
1, C2, C3 and the respective outriggers B are operated so that the sprocket drive device 80
The drive sprocket 23 is rotationally driven to move the endless excavation roller chain 30 and the movable prop 20 is lowered by the prop drive device 70 to move the excavation blade 38.
When the cement-based suspension is pressure-fed to the supply pipe 50 at the same time that the excavation by the A, 38B, 38C and the bit 39 and each cutter 40 is started, the excavation blades 38A, 38B, 38C, the bit 39 and each cutter 40 cause the ground. Is excavated, and the soil and the cement suspension generated by the excavation are agitated and kneaded by the excavating blades 38A, 38B, 38C and the bit 39, each cutter 40, and the agitator 90 to produce an unsolidified soil cement. . In the initial stage of lowering the movable column 20, when the guide arm 13 descends along the guide rail 12 by its own weight and reaches the lower end of the main column 10, it abuts on a stopper 12a provided at the lower end of the guide rail 12 and stops. To do.

After the excavation of a predetermined amount is completed, when the pumping of the cement-based suspension is stopped and the movable column 20 is moved up by the column driving device 70, the movable column 2 is moved.
As the soil cement described above increases in accordance with the increase of 0,
A, 38B, 38C, bit 39, each cutter 40, and stirrer 90 stir-knead and homogenize. At this time, it is also possible to replenish the cement-based suspension by appropriately pressure-feeding it. In addition, all the drilling blades 38A, 38
When B, 38C, the bit 39, and each cutter 40 are lifted to the ground, the sprocket driving device 80 stops the rotational driving of the driving sprocket 23 to stop the transfer of the endless excavating roller chain 30. A soil cement wall is formed. It is also possible to stop the rotation drive of the drive sprocket 23 by the sprocket drive device 80 when the predetermined amount of excavation is completed.

The soil cement wall formed as described above includes the excavating blades 38A, 38B, 38C provided on the lower transfer side of the endless excavating roller chain 30 and the excavating blades 38A, 38B provided on the upper transfer side from the bit 39. , 38C and the length up to the bit 39 as the wall width, and the cutting blade 38
The wall thickness is the length obtained by adding the blade thickness of the tip 43 of the cutter 40 to the width of A, 38B, and 38C, and a substantially rectangular flat cement cement wall is formed. In addition, the continuous soil cement wall W shown in FIGS. 17 and 18 can be sequentially constructed by repeatedly performing the above-described operation in one cycle at predetermined intervals. In the soil cement wall W constructed as described above, H-section steel D as a stress-bearing material is embedded in the soil cement wall W in a non-solidified state as shown in FIG. 19 at appropriate intervals as needed. By doing so, the retaining wall E having a desired strength distribution can be constructed efficiently and economically. Then, if one side of the retaining wall E is dug down as shown in FIG. One side is exposed.

By the way, the excavating and kneading machine 10 of this embodiment is used.
0, a pair of driven sprockets rotatably assembled to the lower end of the movable support column 20 at a predetermined axial interval is used as the driven sprockets 24, and the endless excavation roller chain 30 is sequentially engaged with the drive sprockets 23. The drive roller 36 that fits the link plate 33,
A pair of driven rollers 37, which are provided inside the space 34 and are sequentially engaged with each driven sprocket 24, are provided with the link plates 33, 3.
The drive sprocket 2 is provided coaxially with the drive roller 36 between the outside and the outside, and the excavating blades 38A, 38B, 38C and the bit 39 are provided at one end of the inner link plate 33.
3 and the endless excavating roller chain wound around the driven sprocket 24 and transferred, and the discharge port 51 of the supply pipe 50 through which the cement-based suspension is pressure-fed is disposed in the space between both driven sprockets 24. Since the cement-based suspension is opened downward, the cement-based suspension passes through the space between the pair of driven sprockets 24 and the drive roller 36 of the endless excavating roller chain 30, and the excavating blades 38A, 38B, 38.
It is supplied between C and bit 39 and non-excavated soil accurately without any bias. Therefore, the excavating blades 38A, 38B, 38C and the bit 39 are accurately cooled and the excavating blades 38A, 38C are cooled.
The lifespan of B, 38C and the bit 39 can be improved, and the excavation promotion effect of the cement-based suspension can be expected sufficiently to improve excavation efficiency. Further, during excavation, the excavating blades 38A, 38B, 38C and the bit 39
Part of the soil excavated by (may be mixed with pebbles, etc.) can pass through the space between the drive rollers 36 of the endless excavation roller chain 30 and between both driven sprockets 24. The resistance can be reduced, which also improves excavation efficiency. Further, since the unsolidified soil cement is accurately stirred and kneaded by the excavating blades 38A, 38B, 38C, the bit 39 and the stirrer 90 not only when the movable support column 20 is lowered but also when it is raised, the soil cement is homogeneous. A smooth soil cement wall W is formed.

Further, in the excavating and kneading machine 100 of this embodiment, since the cutter 40 for excavating while rotating integrally with the driven sprockets 24 is attached to the outer peripheral portions of the outer walls of both driven sprockets 24, the cutters 40 can also be used. Compared to the case where the cutter 40 is not provided, which is capable of excavating, stirring, and kneading, a uniform and smooth wall cement wall W can be formed, and the cutter 43 is replaced with a cutter having a different blade thickness (blade width). As a result, the wall thickness of the soil cement wall W can be appropriately changed, and the wall thickness of the soil cement wall W can be easily changed and set.

Further, as shown in FIGS. 4 and 5, since the excavating blades 38A, 38B, 38C and the bit 39 are arranged on the outside in accordance with the rollers 36, 37 of the endless excavating roller chain 30, the excavating blades 38A, 38A, 38B, 38C and the bit 39 can prevent the gap between the drive rollers 36 in the endless excavation roller chain 30 from being blocked, and the gap between the drive rollers 36 can be sufficiently secured. The cement-based suspension and the excavated soil can be satisfactorily passed. Further, since the movable prop 20 above the driven sprocket 24 is provided with the stirrer 90 which is rotationally driven by the endless excavation roller chain 30, the stirrer 90 also stirs and kneads the soil cement to form a uniform soil cement wall. While being formed, the endless excavation roller chain 30 can be prevented from swinging.

In the above embodiment, the discharge port 51 of the supply pipe 50 is arranged on the lower transfer side of the endless excavating roller chain 30 with a predetermined displacement so that a large amount of cement suspension is supplied to the side having a large cutting load. But the supply pipe 5
The discharge port 51 of 0 may be arranged in the space between the driven sprockets 24 and opened downward, and the arrangement position thereof can be appropriately changed. Further, in the above-described embodiment, the stirrer 90 is provided above the driven sprocket 24, but the stirrer 90 may be omitted to implement the present invention.

Further, in the above embodiment, the cutter 4
0 was provided on both sides of the driven sprocket 24, but
It is also possible to carry out the present invention without the cutter 40. In this case, the U-shaped holder 24a fixed to the driven sprocket 24 is unnecessary. Further, in the above-described embodiment, the driven sprocket 24 has a larger diameter than the driven sprocket 23, and the track width of the endless excavation roller chain 30 is gradually narrowed from the driven sprocket 24 toward the drive sprocket 23. Although the excavation resistance is made to act on the lower half portion, as shown in FIG. 21, the driven sprocket 24 has a small diameter, and the track width of the endless excavating roller chain 30 from the driven sprocket 24 to the guide 27 is sequentially arranged. It is also possible to make it wider so that the excavation resistance acts not only on the lower half portion of the driven sprocket 24 but also on the entire portion of the endless excavation roller chain 30 shown in FIG. .

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an excavating and kneading machine according to the present invention.

2 is a front view of the excavating and kneading machine shown in FIG. 1. FIG.

FIG. 3 is an enlarged cross-sectional view taken along line 3-3 of FIG.

FIG. 4 is an enlarged view of a part of the endless excavating roller chain shown in FIGS. 2 and 3 as seen from the outside.

FIG. 5 is a right side view of the endless excavating roller chain shown in FIG.

FIG. 6 is a partially cutaway view of one unit of the chain portion of the endless excavating roller chain shown in FIGS. 4 and 5, enlarged, partially cut away, and viewed from the outside.

7 is a right side view of a chain portion of the endless excavating roller chain shown in FIG.

8 is an enlarged vertical side view of the driven sprocket portion shown in FIG.

9 is an enlarged cross-sectional view taken along the line 9-9 of FIG.

10 is a front view of the cutter alone shown in FIGS. 1, 2 and 9. FIG.

11 is a side view of the single cutter shown in FIGS. 1, 2 and 9. FIG.

FIG. 12 is a partially cutaway bottom view of the single cutter shown in FIGS. 1, 2 and 9.

13 is an enlarged cross-sectional view taken along line 13-13 of FIG.

FIG. 14 is a partially cutaway front view showing an expanded and contracted portion of the supply pipe shown in FIG.

15 is an enlarged front view of the stirrer portion shown in FIG. 2. FIG.

16 is a cross-sectional plan view of the left agitator shown in FIG.

FIG. 17 is a front view showing a case where soil cement walls are continuously formed by the excavating and kneading machine shown in FIGS. 1 and 2 to form soil retaining walls.

FIG. 18 is a plan view of a case where soil cement walls are continuously formed by the excavation and kneading machine shown in FIGS. 1 and 2 to form soil retaining walls.

FIG. 19 is a plan view of a retaining wall reinforced by H-section steel.

FIG. 20 is a cross-sectional view when one side of the retaining wall is dug down.

FIG. 21 is a partial front view showing a modified embodiment of the lower portion of the driven sprocket and the endless excavating roller chain wound around the driven sprocket.

[Explanation of symbols]

100 ... Excavating and kneading machine, 10 ... Main column, 20 ... Movable column, 2
3 ... drive sprocket, 24 ... driven sprocket, 30
... endless excavating roller chain, 33, 34 ... link plate, 36 ... drive roller, 37 ... driven roller, 38
A, 38B, 38C ... Drilling blade, 40 ... Cutter, 50 ... Supply pipe, 51 ... Discharge port, 52 ... Supply port, 70 ... Strut drive device, 80 ... Sprocket drive device, 90 ... Stirrer, W ...
Soil cement wall.

Claims (4)

[Claims] 1. An excavating and kneading machine that kneads soil and cement-based suspension produced by excavation of a land preparation site in situ to form a substantially rectangular soil cement wall, which can be transported and is substantially vertical to the ground. Installed on the main pillar, a movable pillar that is vertically movably mounted on the main pillar and is vertically moved by a pillar driving device, and is rotatably assembled at a lower end of the movable pillar at a predetermined axial interval. A pair of driven sprockets, a drive sprocket that is rotatably assembled to the upper part of the movable column and is driven to rotate by a sprocket drive device, and a drive roller that sequentially engages with the drive sprockets are provided between the link plates. A pair of driven rollers sequentially engaged with each driven sprocket is provided outside the link plates coaxially with the drive rollers and an excavating blade is provided on the link plates. An endless excavating roller chain wound around the drive sprocket and the driven sprocket and transferred, and a discharge port that is arranged in a space between the driven sprockets and opens downward to the movable column. An excavating and kneading machine provided with a supply pipe, which is arranged along the same and through which a cement-based suspension is pressure-fed from a supply port provided at the upper end. 2. The excavating and kneading machine according to claim 1, wherein cutters for rotating and excavating integrally with the driven sprockets are attached to outer peripheral portions of outer walls of the both driven sprockets. 3. The excavating and kneading machine according to claim 1, wherein the excavating blade is arranged on the outer side in accordance with each of the rollers of the endless excavating roller chain. 4. A stirrer, which is rotationally driven by the endless excavating roller chain, is provided on the movable column above the driven sprocket.
The kneader for excavation described in.