JPH02167919A - Multispindle excavator - Google Patents

Abstract

PURPOSE:To excavate the ground of great cross section with good accuracy by a method in which the excavating head tips of excavating shafts set in parallel are set on the same line and excavating parts serving as stirring blades having lapped excavating cross sections are provided to the excavating shaft above the excavating heads. CONSTITUTION:In an excavator machine 1, excavating shafts 3 having heads 2 on their tips are set in parallel in the vertical direction by arranging the excavating tips on the same line. Also, excavating parts 4 serving as stirring blades whose excavating cross sections are lapped with each other are set above the heads 2. Excavating shafts 3a are set above the parts 4 and stirring blades 10 and screw blades 9 are attached exchangeably. The excavator 1 is hung down, and the shafts 3 are turned to excavate pits by changing the turning directions by the side shaft 3 and the central shaft 3 without the escape of the heads 2. Pits of great cross sections can thus be excavated with good accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multi-shaft excavator that has a plurality of auger shafts and is capable of drilling a plurality of consecutive holes at once in foundation work and the like.

[Prior Art and Problems to be Solved by the Present Invention] Conventionally, in this type of multi-axis excavator, each excavation head at the tip of each excavation shaft is installed at a different position in the vertical direction of the excavation axis. . It is generally known that excavation cross sections can be overlapped with each other to allow excavation of a large cross section at a time.

However, since the excavation cross-sections of each excavation head largely overlap with each other, there is a problem in that the clearance at the tip of each excavation head becomes large and the vertical accuracy deteriorates accordingly.

This invention was devised in view of the above-mentioned circumstances, and its purpose is to eliminate run-off at the tip of each drilling head, improve the vertical accuracy of the hole, and also to ensure that large cross-sections can be excavated. Our goal is to provide a multi-axis excavator that can

[Means to solve the problem]

According to the present invention, the multi-axis excavator is configured such that the excavating tips of the excavating heads provided at the distal ends of a plurality of excavating shafts arranged parallel to each other along the vertical direction are aligned on the same line, and
An excavation section which also serves as a stirring blade and whose excavation cross sections overlap each other is provided on the excavation shaft above each excavation section.

By positioning the excavation tips of each excavation head on the same line, the escape of each excavation head is eliminated. In addition, the excavation section is designed to excavate a large cross section.

〔Example〕

The present invention will be explained below with reference to illustrated embodiments.

A multi-shaft excavator 1 (see FIG. 1) includes a plurality of excavating shafts 3 having excavating heads 2 at their tips, which are arranged parallel to each other along the vertical direction. Each excavation head 2 is provided so that its excavation tips are located on the same line. Further, on the excavation shaft 3 above each excavation head 2, an excavation part 4 which also serves as a stirring blade is provided, the excavation cross sections of which overlap each other.

In this embodiment, three excavation shafts 3 are arranged, and the rotation directions of the excavation shafts 3.3 on both sides and the central excavation shaft 3 are changed as shown by the arrows.

Further, the excavating part 4 is constituted by an agitating blade having a plurality of hard claws 5 for excavating, and is also provided with a vibro for blowing out cement milk that also uses air.

In addition, in the excavation part 4 here, the one provided on the central excavation shaft 3 is located higher than the one provided on the excavation shafts 3, 3 on both sides.

As a result, the excavation cross sections of the hard claws 5 of each excavation section 4 overlap with each other. This state is
As shown in FIG. 2, it is also possible for the two side excavation shafts 3.3 to be provided in a higher position than that for the central excavation shaft 3.

Further, above the excavation part 4, an excavation shaft 3a is provided which is detachable by a joint part 7. This excavation shaft 3a is integrated by a spacing fitting 8, and has, for example, a screw blade 9 in the center and stirring blades 10 on both sides.
From those with stirring blade 10 in the center and screw blades 9 on both sides (see Figure 3), or all stirring blades 10
(See Figure 4) can be replaced depending on the soil condition.

Drilling using the multi-axis excavator 1 having such a configuration is performed by suspending the multi-axis excavator 1 and rotating each excavator shaft 3.

At this time, the excavating tips of each excavating head 2 provided at the distal end of the excavating shaft 3 should be placed on the same line, and the excavating shafts 3.3 on both sides and the central excavating shaft should be Since the rotation direction is changed between the drill holes 3 and 3, there is no escape of each drilling head 2, and the vertical accuracy of the drilling hole can be improved.

Further, each excavation head 2 can excavate only separate small-diameter holes, but it is possible to excavate large-diameter holes that communicate with each other through the upper excavation section 4. Incidentally, when the large-diameter hole is excavated by the excavation section 4, cement milk is mixed.

〔Effect of the invention〕

The multi-axis excavator of the present invention positions the excavation tips of the excavation heads provided on the tips of a plurality of excavation shafts arranged parallel to each other in the vertical direction on the same line, and
A feature is that the excavation shaft above each excavation head is provided with an excavation part that also serves as a stirring blade, and whose excavation cross sections overlap each other.

According to this configuration, by positioning the excavation tips of each excavation head on the same line, it is possible to eliminate run-off of each excavation head. Therefore, the vertical accuracy of the drilling hole can be improved.

Furthermore, by positioning the excavation tips of each excavation head on the same line, only small-diameter holes can be excavated without overlapping the excavation cross-sections, but large-diameter holes can be excavated by the excavation section above each excavation head.

As described above, according to the present invention, a hole having a large cross section can be reliably excavated without deteriorating the vertical accuracy.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a multi-axis excavator of the present invention, FIG. 2 is a front view showing another aspect of section A in FIG. 1, and FIG. 3 is a front view showing another aspect of section B in FIG. 1. FIG. 4 is a front view showing still another aspect of section B in FIG. 1. DESCRIPTION OF SYMBOLS 1...Multi-axis excavator, 2...Drilling head, 3...Drilling shaft 3a...Drilling shaft, 4...Drilling part, 5...Incline claw, 6...Blowout pipe , 7...Joint part, 8
... Spacing fitting, 9... Screw blade, 10...
- Stirring blade. Figure Figure

Claims (1)

[Scope of Claims] A multi-shaft excavator in which a plurality of excavating shafts each having an excavating head at the tip thereof are arranged parallel to each other along the vertical direction, wherein the excavating tips of the respective excavating heads are positioned on the same line. The multi-shaft excavator is further characterized in that the excavation shaft above each of the excavation heads is provided with an excavation section that also serves as a stirring blade and whose excavation cross sections overlap each other.