JPH05247927A - Excavator - Google Patents

Abstract

PURPOSE:To make it possible to change the arrangement direction of rotary rods by mounting a leader bracket, a top sieve bracket, a leader pole, a multi- shaft excavation unit and the rotary rods to a crane boom. CONSTITUTION:A crane boom 7 is tuned to a proper position, a multi-shaft excavation unit 5 is turned against an excavation unit carriage 4, and three rotary rods 6 are set in a specific position and a specific direction to excavate and develop a first continuous wall. The crane boom 7 is tuned, and a second continuous wall unit connected to the first continuous wall unit so as to partially overlap is excavated and developed by the rotary rods 6. According to the constitution, development is made by a mounting direction of the rotary rods 6, so that a number of turns of a leader pole 1 is reduced, and a large number of foundation piles can be easily executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavator having a plurality of rotary rods for excavation, which are used for construction of underground continuous walls, foundation piles, etc. by soil column earth retaining method, earth auger method and the like.

[0002]

2. Description of the Related Art Measures against pollution problems such as noise and vibration in construction foundation works and civil engineering works, and existing buildings are close to the planned construction site. On the other hand, there are various restrictions on construction in urban areas, such as the increase in the construction of large buildings, and it is almost impossible to drive ready-made piles, etc. A method of embedding a pile in a hole or injecting cement milk or the like into a hole drilled on site to form a foundation pile has become common. In addition, a soil column earth retaining method has been developed to continuously integrate foundation piles built on site to form underground continuous walls.

However, in the conventional excavator, for example, an excavation unit having three rotary rods for excavation is mounted on a crane vehicle and placed in the site, and three earth augers form one continuous wall. If you try to construct by rotating the crane boom and connecting the continuous wall of the next one unit to the continuous wall that was previously created, you can operate the crane boom only and it will be the center of the three earth augers. Even if the book is guided to a predetermined position, the arrangement direction of the three earth augers with respect to the ground, that is, the direction of the continuous wall of one unit changes due to the turning of the crane boom. As a countermeasure, it is practically difficult to move the crane vehicle, and it is necessary to rotate the excavation unit with respect to the crane boom and correct it.

FIG. 4 shows that the above problem can be addressed.
It is a principal part side view which shows an example of the conventional excavator. 1 is a leader column attached to a swingable crane boom, 2 is a guide rail attached to the leader column 1, 3 is a top sheave bracket attached to the leader column 1, 4 is a carriage for an excavating unit, and is provided on the leader column 1. It is engaged with the guide rail 2 and is supported by the top sheave bracket 3 so as to be vertically movable. 5 is a carriage 4 for an excavation unit
Is a multi-axis drilling unit, and 6 are three rotating rods driven by the multi-axis drilling unit 5, to which a drilling head or the like suitable for the construction method is attached.

A holding and tightening mechanism and a rotation lock mechanism are incorporated in a mechanism portion for holding the middle portion or the upper portion of the leader column 1 by a crane boom, and the leader column 1 is rotated by a predetermined angle to insert a lock pin. Then, the rotation is fixed, and the holding and tightening mechanism is tightened to fix the holding of the leader post 1.

[0006]

However, in the above-mentioned conventional example, each time the crane boom is swung to connect the continuous wall of the next unit to the previous continuous wall, the holding and tightening mechanism is loosened, After the rotation lock mechanism is opened, the leader pillar 1 is rotated by a required angle, the rotation lock mechanism is tightened, and the holding and tightening mechanism is tightened. Therefore, there is a problem that the work is not time-consuming. there were.

The present invention has been made to solve the above-mentioned problems of the prior art, and provides an excavator capable of changing the arrangement direction of a plurality of rotary rods driven by a multi-axis excavating unit quickly and easily. The purpose is to do.

[0008]

Therefore, the excavator according to the present invention has a leader bracket attached to a rotatable crane boom, a top sheave bracket rotatably connected to the leader bracket, and the top sheave. A leader post hanging from the bracket, an excavation unit carriage that can move up and down by engaging with a guide provided on the leader post, and a rotatably mounted on the excavation unit carriage that can move up and down from the top sheave bracket. A multi-axis drilling unit that is supported by, and a plurality of rotating rods for mounting a drilling head mounted downward from the multi-axis drilling unit,
It is intended to achieve the above purpose.

[0009]

With the above structure, the direction of arrangement of a plurality of rotating rods with respect to the crane boom, that is, the leader, is required each time the crane boom is turned to connect the continuous wall of the next unit to the continuous wall of the previous unit. It is usually sufficient to change the arrangement direction with respect to the pillar by simply rotating the multi-axis drilling unit with respect to the carriage for the drilling unit, and this rotation can be performed more quickly and easily by using power. You can

Then, as a result of repeating the above operation, or when the rotation of the multi-axis excavating unit with respect to the excavating unit carriage is about to exceed a predetermined angle range in order to form a curved continuous wall, etc. Return the rotation angle of the multi-axis drilling unit to the carriage for the drilling unit to the old one, rotate the top sheave bracket with respect to the leader bracket, and lock it on the leader post and the guide provided on the leader post to move it up and down. The direction of the excavation unit carriage is changed, and thereafter, the multi-axis excavation unit is rotated again with respect to the excavation unit carriage in the same manner as described above to form an underground continuous wall or the like with the direction of arrangement of the rotating rods as the required direction. be able to.

[0011]

EXAMPLES Excavators according to the present invention will be described below with reference to examples. FIG. 1 is a side view of a main part showing a configuration of an embodiment of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a plan view of the same. The same or corresponding parts as those of the conventional excavator are designated by the same reference numerals.

Reference numeral 7 denotes a swingable crane boom, and a leader bracket 8 is supported on a tip end portion of the crane boom by a horizontal shaft so that the leader bracket 8 does not rotate horizontally. The top sheave bracket 3 is connected to the leader bracket 8 rotatably by 360 degrees every 1 degree, and the rotation lock pin 9 can be fitted and removed from the ground by a wire rope or the like. A leader post 1 reaching the ground is attached to the top sheave bracket 3, and a vertical guide pipe 2 is provided on the front surface of the leader post 1.

The excavation unit carriage 4 is engaged with a guide pipe 2 of a leader post 1 which is a guide, and is vertically movable along the leader post 1.

A multi-axis excavating unit 5 is mounted on the excavating unit carriage 4 so as to be rotatable at an arbitrary angle within a range of 45 degrees on each side. The multi-axis drilling unit 5 is provided with three stirring rods suitable for construction work and three rotating rods 6 having a drilling head 11 such as an earth auger attached downward.

The multi-axis drilling unit 5 is a mobile crane (not shown) via a pulley provided on the top sheave bracket 3.
By the wire rope 10 connected to the winch provided in the above, the excavation work can be performed by vertically moving along with the excavator unit carriage 4 along the leader post 1.

The multi-axis excavating unit 5 is provided with an electric motor 12 and a speed reducer 13 or a hydraulic motor, and the outer rotating rod is rotated in the opposite direction to the rotating direction of the central rotating rod. . Further, as a mechanism for rotating the multi-axis excavating unit 5 with respect to the excavating unit carriage 4, a worm driven by a hydraulic motor provided on the excavating unit carriage 4 side and a fan-shaped worm wheel attached to the multi-axis excavating unit 5 side. A deceleration drive mechanism that is a combination of and is adopted, and is configured to allow remote control of rotation from the ground or a crane boom vehicle.

The center rotary rod of the three rotary rods 6 is covered by a guide casing 14 whose upper end is attached to the multi-spindle excavating unit 5 up to near the ground. Is attached. The three rotating rods 6 are respectively supported by three bearings of the shaft plate 15, and the distance between the excavating heads 11 attached to the tips of the three rotating rods 6 is maintained and at the same time the arrangement of the three rotating rods 6 is arranged. The direction is matched with the direction of the multi-axis drilling unit 5. In addition to the lower end of the guide casing 14, the connecting plate 15 is further installed near the excavation head 7,
It is possible to more reliably hold the interval between the plurality of excavating heads 7 and the linear arrangement.

Reference numeral 16 denotes a tilt correction cylinder, which is a hydraulic actuator connected to the crane boom 7 and the leader bracket 8 to bring the leader pole 1 into a vertical state.

Although not shown, a structure for injecting cement milk or the like from the rotary rod 6 into the ground under excavation is incorporated.

With the above construction, the crane boom 7 is swung to an appropriate position, the multi-axis excavation unit 5 is rotated with respect to the excavation unit carriage 4, and the three rotary rods 6 are set at predetermined positions and predetermined directions. Then, the first continuous wall unit is excavated by the three rotating rods 6 and formed. Then, the crane boom 7 can be swung to excavate and construct the second continuous wall unit connected to the first continuous wall unit so as to partially overlap with the first continuous wall unit by the three rotating rods 6.

The direction of arrangement of the plurality of rotary rods 6 necessary for constructing the second continuous wall unit with respect to the ground is as follows.
When the rotation of the multi-axis excavation unit 5 with respect to the excavation unit carriage 4 when the first continuous wall unit is constructed is fixed, the crane boom 7 is swung to cause 3
The arrangement direction of the rotary rods 6 of the book with respect to the ground changes,
The second continuous wall unit is constructed by slightly bending the continuous wall unit.

In order to make the above correction or to form a curved continuous wall, it is only necessary to rotate the multi-axis excavation unit 5 from the ground with respect to the excavation unit carriage 4, and to swivel quickly. 3 in the necessary array direction easily at the required position
The rotary rod 6 of the book can be set and excavated.

Then, in order to repeat the above-mentioned operation or to form a large curved continuous wall, the rotation of the multi-axis drilling unit 5 with respect to the drilling unit carriage 4 exceeds a predetermined angle range of plus or minus 45 degrees. In such a case, before the excessive rotation of the multi-spindle excavation unit 5, the rotation angle of the multi-spindle excavation unit 5 with respect to the excavation unit carriage 4 is restored to the old one, and the rotation lock of the top sheave bracket 3 is performed. Pull out the pin 9 from the ground,
By rotating the top sheave bracket 3 with respect to the leader bracket 8 up to a required angle, the direction of the excavator unit carriage 4 that moves up and down by being locked by the leader post 1 and the guide 2 provided on the leader post 1, is changed. The rotation lock pin 9 is inserted by an operation from the ground, and thereafter, the multiaxial excavation unit 5 is rotated again with respect to the excavation unit carriage 4, whereby the arrangement direction of the rotary rods 6 is set as a required direction and the underground continuous wall is formed. Etc. can be created.

In the above description of the embodiment, an excavator having three rotating rods 6 has been described, but it is also possible to adopt a structure having four or more rotating rods, in which case the rotating rods adjacent to each other will be described. Reversing the direction of rotation is effective for improving the stability of the excavator and maintaining the accuracy of excavation work.

[0025]

As described above, according to the present invention, the troublesomeness of the conventional excavator in which the direction of the excavation unit carriage that is moved up and down by being locked by the leader post and the guide provided on the leader post is changed every time. No operation is required, and by rotating the multi-axis excavation unit with respect to the excavation unit carriage by operation from the ground, it is possible to construct a continuous wall with the arrangement direction of the rotating rods as the required direction.
The number of times the leader pillar is rotated may be small.

For example, when a crane boom vehicle is placed in the center of a square construction site, it is sufficient to rotate the top sheave bracket with respect to the leader bracket only four times to change the direction of the leader post 1. Other than the above, as it is theoretically possible to form a continuous wall on four straight sides by a simple operation of rotating the multi-axis drilling unit with respect to the carriage for the drilling unit, it is possible to continue underground more quickly and easily than before. You can build walls.

As in the above, not only the underground continuous wall but also a large number of foundation piles can be easily constructed.

[Brief description of drawings]

FIG. 1 is a side view of essential parts showing the configuration of an embodiment.

FIG. 2 is a front view of a main part showing the configuration of one embodiment.

FIG. 3 is a plan view of an essential part showing the configuration of one embodiment.

FIG. 4 is a side view of essential parts showing an example of a conventional excavator.

[Explanation of symbols]

 1 Leader Pillar 2 Guide Pipe 3 Top Sheave Bracket 4 Carriage for Drilling Unit 5 Multi-axis Drilling Unit 6 Rotating Rod 7 Crane Boom 8 Reader Bracket 9 Rotating Lock Pin 10 Wire Rope 11 Drilling Head 12 Electric Motor 13 Reducer 14 Guide Casing 15 Shaft plate 16 Tilt correction cylinder

Claims (2)

[Claims] 1. A leader bracket attached to a swingable crane boom, a top sheave bracket rotatably connected to the leader bracket, a leader post hanging from the top sheave bracket, and a guide provided on the leader post. And a multi-axis excavating unit that is rotatably mounted on the excavating-unit carriage and is vertically movably supported by the top sheave bracket. An excavator comprising a plurality of rotating rods for attaching an excavating head mounted downward from a unit. 2. The top sheave bracket is rotatable with respect to the leader bracket at a predetermined angle by 360 degrees,
2. The excavator according to claim 1, wherein the multi-axis excavating unit can be rotated by an arbitrary angle by remote control within a predetermined angle range with respect to the excavating unit carriage.