JPS6033183Y2 - excavator - Google Patents

Description

[Detailed explanation of the idea] This invention relates to an excavator for burying piles.

Conventionally, in order to bury ready-made piles without noise and vibration,
First, a hole is drilled using an earth auger while injecting bentonite or cement mill resin into the ground, and the inside of the hole is made into a soil or cement-like shape. There is a method of injecting mixed cement milk, pulling up the earth auger, and inserting and burying the pile into the hole.

In this case, bentonite, cement milk, and excavated soil are stirred and kneaded using an auger screw. It is much better to use one with a stirring rod and auger head.

In general, excavation machines using an auger rod equipped with a stirring rod and an auger head are mounted on a crawler crane, attached to a pile driver equipped with a dermist, and connected to an electric reducer that moves up and down as a leader mast guide. In addition, since an auger rod is connected to this electric reduction gear, the leader mast supports the crawler crane at three points and becomes large in size.

This makes it impossible to work in narrow spaces.

In other words, it was almost impossible to work if the frontage was less than 8 meters.

In view of the above points, this invention aims to provide an excavator that can perform complete work even if the width is about 5 meters.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

In the figure, 1 is a crawler, and this crawler 1 has 1
．． A boom 2 that can be rotated to raise and lower, and an arm 3 that is located in front of the boom 2 and can be adjusted to raise and lower are provided.

In the illustrated case, the boom 2 and arm 3 have their lower ends pivoted on the catch hawk 4 of the crawler 1, and the boom 2 and arm 3 can be moved up and down by a wire 5.6 that can be wound up and unwound. It is supposed to be done.

Furthermore, a rotary body 8 is provided at the upper end of the arm 3 and is driven by a drive device 7, with its axis being vertical.

In the case shown, the above drive device 7 is a motor (not shown)
A worm gear 9 that is driven by a worm gear 9 is meshed with a worm gear 10 that constitutes a rotating body 8.

Also, a square hole 11 whose upper and lower surfaces penetrate through the center of the rotating body 8
A square shaft auger rod 13 having a passage 12 at its axis is passed through the square hole 11, and a sheave 1 at the upper end of the boom 2 is provided at the upper end of the auger rod 13.
The tip of a wire 15 that can be wound up and unwound is connected at 4.

The lower end of the auger rod 13 is connected to the upper end of a tube shaft 17 having an auger head 16 having a diameter larger than the diameter of the buried pile at the lower end.

Further, a corrugated steel pipe casing 18 having the same diameter as the auger head 16 is fitted between directly above the auger head 16 and the top of the tube shaft 17, and the casing 18 and the tube shaft 17 rotate together. It is supposed to be done.

Furthermore, the tube shaft 17 within the casing 18 is provided with a stirring member '19 in the form of a protruding rod or threaded blades.

Note that the auger head 16 is attached directly to the auger rod 13,
A casing 18 and a stirring member 19 may also be provided.

Moreover, when drilling a hole with a depth longer than the boom 2, the auger rod 13 may be added, or it may be extended as an extendable structure.

Further, by connecting the tip of a hose (not shown) to the upper end passage 12 of the auger rod 13', bentonite or cement milk can be injected from the ground.

In the figure, 20 is a receiving member for the driving device 7' and the rotating body 8.

21 is a support rod of the casing 18 with respect to the tube shaft 17.

The excavator according to this invention has the above-mentioned configuration. Next, to explain the excavation method, first, the auger head 16 is placed on the ground.
The auger rod 13 is pulled up by winding the wire 15 so that it does not come into contact with the auger rod 13.

Next, after setting the auger rod 13 on the pile core and confirming that it is vertical, the drive device 7 drives the auger rod 13 via the rotary body 8, and the wire 15 is unwound to drive the auger head 16. Excavation begins.

At this time, cement milk is injected from the tip of the auger head 16 from the passage 12 through the tube shaft 17.

With the above-mentioned excavation, the casing 18 is fitted into the borehole A and the outer circumferential surface of the casing 18 strokes the circumference of the borehole A, and the soil excavated by the auger head 16 mixes with cement milk. Since the stirring member 19 inside the hole is stirred and kneaded, the inside of the drilled hole A is turned into zoyl cement.

When the auger head 16 reaches a predetermined support layer, rich blended cement milk is injected instead of the cement milk described above, and when the injection is finished, the wire 15 is wound while continuing to drive the auger rod 13. Gradually pull up the auger rod 13 using a handle.

At this time, since the outer peripheral surface of the rotating casing 18 strokes the peripheral surface of the drilled hole A, collapse of the hole wall of the drilled hole A can be prevented.

When the auger rod 16 escapes to the ground, a stake is suspended from the boom 2 via a wire, and the stake is inserted into the drilled hole A.

Piles can be inserted almost entirely by their own weight.

As described above, the excavator according to the invention includes a crawler having a boom, an arm whose lower end is supported by the boom or crawler in front of the boom, and an axis line which is perpendicular to the upper end of the arm. a rotating body rotatably supported;
A drive device that drives this rotating body, a square hole provided in the center of the rotating body so that the top and bottom surfaces are open, and an auger rod with a square shaft that extends through the square hole and is movable up and down by a wire. An auger head installed at the lower end of the auger head, a casing installed directly above the auger head to rotate together with the auger rod, a stirring member housed within the casing, and cement milk etc. injected into the auger head from the upper end of the auger rod. Since the earth auger is constructed with a passage provided so as to move, it is smaller and lighter than a conventional long casing and an earth auger fitted inside the casing.

As a result, the crawler is also smaller, making it possible to bury piles even in narrow spaces.

What's more, one machine can perform both drilling work and inserting and burying piles.

[Brief explanation of drawings]

FIG. 1 is a side view of the excavator according to this invention, FIG. 2 is an enlarged vertical side view showing the main parts of the same, and FIG. 3 is a cross-sectional plan view of the same. 1...Crawler-12...Boom, 3
...Arm, 4...Catch Hawk,
5...Wire, 6...Wire, 7
... Drive device, 8 ... Rotating body, 9 ...
... Worm gear, 10 ... Worm gear, 11 ... Square hole, 12 ... Passage, 13
... Auger rod, 14 ... Sheave, 15 ... Wire, 16 ... Auger head, 17 ... Tube shaft, 18 ... ...Casing, 19... Stirring member.

Claims (1)

[Scope of utility model registration request] A crawler having a boom, an arm whose lower end side is supported by the boom or crawler in front of the boom, a rotating body rotatably supported with an axis perpendicular to the upper end of the arm, and the arm that drives the rotating body. a square hole provided in the center of the rotating body so that its top and bottom surfaces are open; an auger rod with a square shaft passing through the square hole; A windable and unwindable wire connecting the tips, an auger head provided at the lower end of the auger rod, a casing that rotates together with the auger rod directly above the auger head, a stirring member housed within the casing, and an auger rod. This excavator is powerful because of the passageway for injecting cement milk, etc., which is connected to the auger head from the top end.