JPH1181298A - Expansion leader device of poor subsoil improving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve propulsion speed of a stirring shaft (stirring rod) by a leader, to shorten the leader so as to reduce an assembling time at site, to eliminate and a height work and to dispense with disassembling movement. SOLUTION: Leaders 2, 3 of the upper and lower steps is expandable on one straight line by a built-in hydraulic cylinder 1, the lower step leader 3 is supported with a supporting body 4, the upper end part of a guide rod 5 in parallel with the leader 2 is supported with the upper end part of the upper step leader 2, an engaging metal fitting 5 provided on the lower end part of the guide rod 5 is slidably engaged with a leading guide 7 provided on the lower step leader 3, the end part of a chain 9 laid around small sprockets 8, 8' provided on the upper and lower ends of the guide rod 5 is connected to a stopper 6'' provided on the upper end part of the lower step leader 3, and the rotationally moving machine box 10 of a stirring shaft 11 is connected to the chain 9 and slidably engaged along the guide rod 5. The upper step leader 2 can be housed in the lower step leader 3 by the hydraulic cylinder 1, and the rotationally moving machine box 10 is formed so as to descend along the guide rod 5 by the rotationally movable chain 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leader for a stirring rod in a soft ground improvement machine.

[0002]

2. Description of the Related Art In the prior art, the connection between a leader and a driving machine by on-site assembling work was performed by making the reader almost vertical and docking with the driving machine and pins, so that work at a high place was necessary. Wires were required to be relocated in places where wires were in the air in the ground improvement site. When transporting, if you are a single leader, you can't break apart and shorten it. In addition, if the leader itself can be disassembled at the time of on-site assembly, it must be assembled on-site. When a strong wind occurred, the leader had to be defeated or disassembled. It was difficult to increase the propulsion speed of the stirring rod.

[0003]

SUMMARY OF THE INVENTION The present invention is to increase the speed of the stirrer rod propelled by the leader, shorten the on-site assembly time by extending and retracting the leader, eliminate work at heights, and eliminate disassembly and movement. With the goal.

[0004]

In order to achieve the above object, according to the present invention, the upper and lower leaders can be extended and contracted in a straight line by a built-in hydraulic cylinder, the lower leader is supported on a support, and the upper leader is supported by the upper leader. The upper end supports the upper end of the guide rod parallel to the leader, and the engagement fitting provided on the lower end of the guide rod slidably engages with the guide provided on the lower leader, and the upper and lower ends of the guide rod. Connect the end of the chain hung on the small sprocket provided to the stop provided at the upper end of the lower leader, connect the rotating machine housing of the stirring shaft to the chain, and slide freely along the guide rod. The upper and lower leaders of the soft ground improvement machine are engaged with each other, and the upper leader can be stored in the lower leader by the hydraulic cylinder, and at the same time, the rotating machine housing can be lowered along the guide rod by the chain. Constituted by telescopic reader device soft soil improvement machine vertically controllably formed was the first invention, wherein the support by the moving body and loaders.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A support 4 is formed by forming a tip of a boom 13 provided on a vehicle body 4 'of a crawler 12 by a cylinder 14 so as to be extendable and contractible.
Is pivotally supported by a pin 16 on a mounting piece 15 provided on the upper part of
The tip of a substantially horizontal vertical control cylinder 17 provided at the lower part of the vehicle body 4 ′ is attached to the lower holder 1 of the lower reader 3.
8 to control the longitudinal displacement vertically. The lower holder 18 is a rectangular frame in the left-right direction as shown in FIG. 3, and small cylinders 19 provided on the left and right inside the frame.
19 'sandwiches the lower reader 3 and the small cylinder 19,
The displacement of the lower reader 3 in the left-right direction can be controlled vertically by the expansion and contraction of 19 ′.

Further, as shown in FIGS. 6 and 7, a support 4 is formed by a telescopic forward cylinder 20 provided on the vehicle body 4 'of the crawler 12, and its tip is provided below the lower reader 3. Pivoted on a piece 15 'by a pin 16',
The vehicle body 4 'and the upper part of the lower reader 3 are supported by two inclined cylinders 21 and 21 (FIG. 8), and the lower reader 3 can be supported vertically. The forward cylinder 20 can vertically control the displacement of the lower reader 3 in the front-rear direction, and the expansion and contraction of the two inclined cylinders 21 can control the lateral displacement of the lower reader 3 vertically.

The upper reader 2 is telescopically fitted into the lower reader 3 as described above, and the upper reader 2 is extended and contracted by the hydraulic cylinder 1 built in the both readers 2 and 3, so that the total of the two readers 2 and 3 is obtained. It can be expanded and contracted from the maximum length L to the minimum length approximately L / 2.

At the upper end of the upper reader 2, there is provided a mounting bracket 5 'for supporting the upper end of the guide rod 5, and the guide rod 5 is suspended from the upper and lower brackets 5' in parallel with the upper and lower readers 2, 3. The engagement fitting 6 provided at the lower end of the lower 5 is slidably engaged with the guide 7 provided on the lower reader 3.

The lower end of the guide rod 5 is located at the upper end of the lower leader 3 as shown in FIG. 1, and the engagement fitting 6 is engaged with the upper end of the guide 7.

The upper and lower ends of the guide rod 5 are pivotally supported by pins 5 "and 6 'on a mounting bracket 5' and an engaging bracket 6, and small sprockets 8 and 8 'are provided on the pins 5" and 6', respectively. A chain 9 is hung between the small sprockets 8 and 8 'so as to be able to rotate forward and backward.

The guide rod 5 is provided with a machine guide 7 ', and a stirring shaft rotating machine 10 slidably engaged with the machine guide 7' is arranged. Connect to

The rotating machine housing 10 supports the upper end of the stirring shaft 11, and the stirring shaft 11 includes inner and outer double tubes 11 ′ and 11 ″. Gears for rotating the inner and outer double tubes 1 in a state in which the casing 10 is supported on the upper end of the upper reader 2.
When the lower ends of 1 ′ and 11 ″ are at the maximum length L of the upper and lower tier readers 2 and 3 (FIG. 1), the stirring blades 2 are disposed near the ground 22 and at the lower ends of the inner and outer double tubes 11 ′ and 11 ″, respectively.
3, 23 'are provided above and below.

The middle part of the outer tube 11 ′ is rotatably supported by a middle support ring 24 protruding from the engagement fitting 6, and the lower end is rotated by a lower support ring 24 ′ provided below the lower leader 3. It is movably supported.

The both ends of the chain 9 are fixed to stoppers 6 ", 6" protruding from the front of the upper end of the lower reader 3. The upper reader 2 is moved up and down to move the casing 10 up and down.
Can be raised and lowered between the upper and lower ends of the guide rod 5, and at the same time, the guide rod 5 can be lowered together with the upper reader 2 to almost the same height as the lower reader 3 (FIG. 4).

Therefore, the drive motor 25 provided in the casing 10
When the inner and outer double tubes 11 'and 11 "are rotated and the built-in cylinder 1 is contracted, the upper leader 2 is lowered, the sprockets 8 and 8' are rotated, and the guide rod 5 is lowered. The chain 9 descends as the guide rod 5 descends,
At the same time, the casing 10 descends along the guide rod 5, and the casing 10 descends at a constant speed from the uppermost position shown by the solid line in FIG. 1 to the lowermost position shown by the imaginary line in FIG. Can be propelled underground.

At this time, of course, cement milk is poured from the upper end of the inner pipe 11 "and discharged into the ground from the lower end, so that the stirring blade 2
At 3, 23 ', this is stirred with earth and sand to form a soil cement column in the ground, and then the casing 10 is raised from the imaginary line position to the solid line position in FIG.
By repeating this, the soil cement pillars are juxtaposed in the ground to improve the ground. Further, when the upper reader 2 is raised, the casing 10 is also moved by the operation reverse to the above.
Rises to the upper end of the.

Reference numeral 26 in the figure denotes a short telescopic leg provided at the lower end of the lower reader 3 to support the lower reader 3 on the ground by a small cylinder 27. Also, 28 is an underground piercing rod for fixing the lower reader 3, 29 in FIGS. 6 and 7, an raising and lowering arm that raises the lower reader 3 by approximately 45 degrees, 30 is a cylinder for raising and lowering the lower reader 3, 31 is a power unit, and 32 is an outrigger. 5, reference numeral 33 denotes a wire rope for raising and lowering the upper and lower leaders 2 and 3, reference numeral 34 denotes a driving drum thereof, and reference numeral 35 in FIG. 1 denotes a cylinder for raising and lowering the boom 13.

[0018]

As described above, according to the present invention, the upper reader can be accommodated in the lower reader, and the height or length of the leader can be reduced to almost half, thereby eliminating work at height. In addition, there is an effect that the length of the leader can be almost halved during the movement by the support and the disassembly movement can be eliminated.

[Brief description of the drawings]

FIG. 1 is a side view showing a telescopic leader device of the present invention.

FIG. 2 is a side view of a lowered state.

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

FIG. 4 is an explanatory side view showing a relationship between a leader elevating and lowering and a rotating chain.

FIG. 5 is a side view showing a leader hoisting wire rope.

FIG. 6 is a side view of the leader lying down.

FIG. 7 is a side view illustrating a procedure in a standing state.

FIG. 8 is a partial perspective view of the leader and the cylinder shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Built-in hydraulic cylinder 2, 3 Upper and lower stage leader 4 Support 4 'Moving body 5 Guide rod 6 Engagement fitting 7 Guide guide 8, 8' Small sprocket 9 Chain 10 Stirring shaft rotating machine housing

Claims (2)

[Claims] 1. A built-in hydraulic cylinder allows upper and lower leaders to expand and contract in a straight line, supports a lower leader on a support, and supports an upper end of a guide rod parallel to the leader on an upper end of the upper leader. Then, the engagement fitting provided at the lower end of the guide rod is slidably engaged with the guide provided on the lower leader, and the end of the chain that is hung on the small sprocket provided at the upper and lower ends of the guide rod is attached. It is connected to a stopper provided at the upper end of the lower reader, and the rotating machine housing of the stirring shaft is connected to the chain and slidably engaged along the guide rod. A telescopic leader device for a soft ground improvement machine that can be stored by a hydraulic cylinder and at the same time, the rotating machine housing can be lowered along the guide rod by the chain. 2. A telescopic leader device for a soft ground improvement machine according to claim 1, wherein the lower leader is formed so as to be vertically controllable on a support by the moving vehicle body.