JPH08199574A - Repairing excavation type multi-spindle excavation operating machine - Google Patents

Abstract

PURPOSE: To prevent the collapse of part remaining unexcavated by providing an unexcavated part repairing excavation device to a repairing excavation type multi-spindle operating machine, and making it possible to change the rotational direction of repairing excavation wings in accordance with properties of the ground. CONSTITUTION: A repairing excavation type multi-spindle excavation operating machine is equipped with excavation heads 10, two excavation stirring main shafts 8 are connected on the upper ends in a state to parallel with both right and left, and an unexcavated part repairing excavation device A is provided to a position slightly upward of the excavation heads 10. Then, two excavation stirring main shafts 8 are rotated, and when the ground is started to excavate, circular pits adjacent to each other are excavated with stirring wings 9, and then, a clod of excavated soil is crushed with auxiliary excavation wings 23 and auxiliary excavation wings 23a, at the same time, it is stirred with them, stirring is also made with stirring wings 9, and simultaneously a wedge-like unexcavated part remaining in a neighboring section of the circular pits is cut from up to down with the repairing excavation wings 23 on both sides to excavate. By the constitution, a continuous hole with no unexcavated part is formed and, at the same time, semi-circular ends of the continuous hole are excavated in a square with the auxiliary excavation wings 23a on both sides to form a rectangular continuous hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention connects a plurality of excavating work shafts, each having a working vane such as a stirring vane on the outer circumference of the shaft and an excavating head at the lower end of the shaft, in parallel with each other and connected to a rotary drive unit. In the multi-axis excavator, the wedge-shaped uncut portions formed between the circular vertical holes that are excavated adjacent to each other or partially overlapped by each excavating operation shaft are repaired and excavated to form a continuous long hole. The present invention relates to a repair excavation type multi-axis excavation work machine.

[0002]

2. Description of the Related Art Conventionally, as a repair excavation type multi-spindle excavator and agitator, two excavator and agitator spindles having agitating blades on the shaft outer periphery are connected in parallel to a rotary drive unit and drooped to connect the shaft centers of both spindles. The auxiliary shaft is rotatably supported horizontally on both sides of the wire, and a repairing excavating blade for excavating a wedge-shaped uncut portion is provided on the outer periphery of the auxiliary shaft. A structure in which rotation is transmitted via a worm and a worm wheel is known.

By the way, in general, when excavating the unexcavated portion with the excavation blade for repairing while excavating into the ground with two excavation and agitation main shafts, for example, in the case of ordinary soil such as clay layer, the excavation blade for repair is compared with the unexposed portion. Rotate to cut from top to bottom, but on the ground where sand layer, gravel layer, etc. are likely to collapse, rotating the cutting blades for repair in the opposite direction to cut from bottom to top minimizes collapse. Desired to stay.

However, in the above-mentioned conventional machine, since the rotating direction of the repairing excavation blade cannot be changed independently of the excavation stirring main shaft, the repairing excavation can be performed according to the above-mentioned properties of the ground. As a result, when excavating the uncut portion of the collapsible ground such as the sand layer and the gravel layer, there is a drawback that the portion is largely collapsed.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to excavate an unexposed portion according to the properties of the ground.

[0006]

As means for solving the above-mentioned problems, the present invention has a rotary drive unit supported by a support member so as to be able to move up and down, a working blade on the outer circumference of the shaft, and an excavation head on the lower end of the shaft. In a multi-axis excavating work machine in which a plurality of work spindles are connected in parallel in a left-right direction and hang down, a support ring is rotatably fitted to the lower portion of each excavation work spindle, and the excavation is performed from each support ring. Holders are projected on both sides of the parallel line of the work spindle, and the auxiliary shafts are rotatably supported by the holders adjacent to each other on the left and right sides, and the auxiliary shafts are connected to the forward / reverse rotation motor mounted on the holders so that the auxiliary shafts can rotate. Then, there is proposed a repair excavation type multi-axis excavating work machine in which a repair excavation blade for excavating a wedge-shaped uncut portion is provided on the outer peripheral surface of the sub shaft.

The "working blades" of the excavating work spindle in the present invention are propeller blades, stirring blades such as spiral blades for one rotation, conveying blades such as continuous spiral blades, excavating blades such as blades having bits, A composite blade including a plurality of these blades is included.

Further, as the above-mentioned "repair excavation blade", a propeller blade, a water wheel blade, and other blades having various structures are appropriately and selectively used. Further, the "motor" may be either a hydraulic motor or an electric motor. Embodiments of the present invention will be described below with reference to the drawings.

[0009]

1 (a) and 1 (b), a lower end portion of a leader mast (2) is connected as a supporting member to a front end portion of a base machine (1) to vertically stand and support the mast (2). ) Is slidably engaged with the guide rails (3), (3) laid on the front surface of (1) via a slide metal fitting (5) and a top drive unit (4). A wire (7) hanging down from a block (6) supports the wire shaft (7) so that it can be moved up and down. The output shaft of this rotary drive unit (4) has stirring blades (9) at the bottom and an excavation head (10) at the bottom. Book excavation and stirring spindles (8), (8) are connected to each other at the upper end of the spindle in parallel with each other via a rotation transmission gear train, and the stirring heads (10) of both stirring spindles (8), (8),
An unexcavated part repair excavator (A) is mounted at a position slightly above (10).

The structure of the repair excavator (A) is as follows. 2, 3 and 4, the spindle (8),
A pair of upper and lower flanges (11) (1) in (8)
Support ring (12) between (1), (11) (11),
(12) is rotatably fitted through the bushes (13), and the supporting rings (12) and (12) are connected to the parallel lines (l) of the main shafts (8) and (8), that is, both main shafts ( 8),
A pair of short arms (14), (14), (14), (14) are respectively projected toward both sides of a line connecting the centers of (8), and holders (15), (15) are attached to the tips of these arms.
Is fixed. As shown in FIG. 4, the holder (15) has a cylindrical bearing tube (1) having a tip opening for supporting the counter shaft from both end surfaces of the cylindrical case (16) in which the motor is housed.
7) and (17) are projected on the same axis, and the holders (15) are arranged on the same horizontal plane with their axes parallel to the parallel lines (l).

As the above-mentioned motor, in this example, a forward / reverse rotation hydraulic motor (18) projecting the output shafts (19) and (19) from both ends is used. (19), (19) to the bearing tube (17), (1
7) They are stored in the state of looking inside.

Of the auxiliary shafts, auxiliary shafts (20), (20) corresponding to the wedge-shaped uncut portion are hollow circular outer shafts (2).
1) An inner shaft (22) having an outer diameter smaller than its inner diameter and longer than that is concentrically inserted and fixed, and annular grooves are formed at both ends between both shafts. This auxiliary shaft (20) , (20) oriented parallel to the parallel line (1), the bearing tubes (17) of the holders (15), (15) adjacent to each other on the left and right,
Both ends of the inner shaft (22) are rotatably inserted into the (17), and the output shaft (1) of the hydraulic motors (18) and (18) is inserted.
9) and (19), and the bearing tube (1
Both ends of the outer shaft (21) are rotatably fitted and supported on the outer circumferences of (7) and (17). Such counter shaft (20),
On the outer peripheral surface of (20), propeller-like repairing excavating blades (23) for excavating the wedge-shaped uncut portion are provided in a protruding manner.

In the present example, further, as the end rectangular auxiliary excavating means for auxiliary excavating the semicircular arc-shaped both ends of the continuous hole to be excavated by the present machine in a rectangular shape, the hollow circular outer shaft (21a) has an outer diameter larger than its inner diameter. Secondary shafts (20a), (20a), (20a), (20) formed by inserting and fixing an inner shaft (22a) having a small diameter.
Each bearing tube (17) of each holder (15) located at the left and right ends with a) oriented parallel to the parallel line (l).
The end portions of the inner shaft (22a) are respectively inserted into the inner parts to connect with the respective output shafts (19) of the hydraulic motors (18), and the outer shaft (21a) is provided on the outer circumference of the bearing tube (17). ) ... end portions of the auxiliary shafts are rotatably fitted and supported, and propeller-shaped auxiliary excavation blades (2) are attached to outer peripheral surfaces of the auxiliary shafts (20a).
3a) ... are provided in a protruding manner.

(24) and (24) are the hydraulic motors (1
8) is a pressure oil supply pipe extending to the main shafts (8) and (8), and the main shaft (8),
A support ring (25) rotatably fitted in (8),
It is held by support plates (26) and (26) supported by (25). (27) is the pressure oil supply pipes (24), (2
The discharge nozzle is opened on the repairing excavation blades (23) ... With a chemical supply pipe such as a solidifying agent extended in parallel with 4).

The operation of the above example will be described below. By starting the rotary drive unit (4), two excavation stirring spindles (8), (8)
2 in the directions of the arrows in FIG. 2, and then when the ground is a clay layer, the auxiliary shafts (20), (20a) on the front side with the parallel line (l) as the boundary are started by starting the hydraulic motors (18). (20
a) and that on the rear side (20), (20a), (20a) are respectively rotated in the directions of the arrows in FIG. 4 to start excavation in the ground, the excavation heads (10) for both spindles (8), (8) are started. ),
The circular vertical holes adjacent to each other are excavated in (10), and then the excavated soil mass is crushed and agitated by the auxiliary excavation blade (23) ... And the auxiliary excavation blade (23a). The blades (23) for repair on both sides of the wedge-shaped uncut portion left in the adjacent portion of the circular vertical hole
, (23) are cut from the top to the bottom to excavate, thereby forming a continuous hole with no uncut portion, and semi-circular arc-shaped ends of the continuous hole are provided on both sides of auxiliary excavation blades (23a).
, (23a) ... excavates in a rectangular shape, thereby forming a continuous hole having a rectangular cross section.

In the case where the ground is a ground such as a sand layer or a gravel layer which is likely to collapse, the two main shafts (8) and (8) are rotated in the same direction as the above example for excavation and stirring, but the front auxiliary shaft ( 20), (20
a), (20a) and the rear counter shafts (20), (20a),
(20a) is rotated in the direction opposite to the above example by switching the hydraulic pressure of each hydraulic motor (18) ... When excavating the ground,
Agitating while excavating adjacent circular vertical holes, and excavating blades (23), (23) for repairing the wedge-shaped uncut portion
… And the excavation blades (23a) for repairing both ends of the semi-circular shape,
(23a) ... Cut from the bottom to the top and excavate,
As a result, a continuous hole having a rectangular cross section with less collapse is formed.

As another embodiment, the repair excavator (A) in the above example may be provided in a plurality of upper and lower stages to enhance excavation and stirring efficiency.

[0018]

The repair excavation type multi-axis excavating work machine of the present invention comprises:
Since the motor for exclusive use for repairing excavation blades is provided, the rotation direction of the excavation blades for repair is changed depending on whether the ground to be excavated is a normal ground such as a clay layer, a sand layer, or a collapsible ground such as a gravel layer. As a result, it is possible to excavate while minimizing the collapse of the unexcavated portion, and the auxiliary ring that has auxiliary excavation blades via a holder on a support ring that is rotatably fitted to multiple excavation work spindles. Since the motor dedicated to the shaft and the auxiliary shaft is supported, the underground portion does not become so large and effective excavation can be continued.

[Brief description of drawings]

FIG. 1 (a) is a front view of a multi-axis drilling agitator with a repair drilling device. (B) It is a side view same as the above.

FIG. 2 is an enlarged front view of a repair excavation device portion.

FIG. 3 is an enlarged side view of the same.

FIG. 4 is an enlarged half sectional view taken along line IV-IV of FIG.

[Explanation of symbols]

 2 Leader mast 4 Rotation drive part 8 Excavation stirring main shaft 9 Stirring blade 10 Excavation head 12 Support ring 15 Holder 18 Hydraulic motor 20 Secondary shaft 23 Compensation excavation blade l Parallel line

Claims (1)

[Claims] 1. A plurality of excavation work spindles, each having a working blade on the outer circumference of the shaft and an excavation head at the lower end of the shaft, are connected in parallel to each other to a rotary drive unit supported by a support member so as to hang down. In a multi-axis excavating work machine consisting of, a supporting ring is rotatably fitted to the lower part of each of the excavating work spindles, and a holder is projected from each of the supporting rings to both sides of a plurality of parallel lines of the excavating work spindle, The auxiliary shaft is rotatably supported by the holders adjacent to each other on the left and right, and the auxiliary shaft is connected to the forward / reverse rotation motor mounted on the holder so that the rotation can be transmitted, and the wedge-shaped uncut portion is formed on the outer peripheral surface of the auxiliary shaft. A repair excavation type multi-axis excavating work machine that has protruding excavation blades to be excavated.