JPH0246501Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to an improvement of an earth auger drilling device used for pile construction.

[Prior art and its problems]

If a rotating casing is provided on the outside of the auger screw of the earth auger, and a drilling blade is provided at the tip of the rotating casing to perform concentric core drilling, efficient drilling is possible. At the same time, it can also be used as a formwork when pouring mortar, etc. On the other hand, if cement milk is used as the pouring material and the piles are constructed with so-called soil concrete, which is a mixture of the excavated earth and sand and this cement milk, the earth and sand to be discharged can be used as is, making it less troublesome. Since this requires sufficient agitation, the above-mentioned double excavation device of an auger screw and a casing is not suitable.

[Purpose of invention]

Taking these circumstances into consideration, the purpose of the present invention is to enable a device that double excavates the inside and outside of the auger screw and its outer rotating casing to exhibit a stirring function capable of producing soil concrete by simply adding a simple configuration. Our goal is to provide drilling equipment.

[Key points of the idea]

However, according to the present invention, the purpose of the lever is to combine a rotating casing connected to an outer excavation mechanism and provided with a cutting blade at the tip, and an auger screw connected to the inner excavation mechanism. In an excavating device equipped with a mechanism for dispensing cement milk, etc., stirring blades are provided protruding from the inner surface of the rotating casing, and the tip thereof is vertically overlapped with the screw tip of the auger screw.

[Example of idea]

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The figure is a partially cutaway front view showing an embodiment of the drilling equipment of the present invention. In the figure, 1 is a steel pipe rotating casing connected to the front end with a casing head 1a having a drilling blade 2 at the tip, and 3 is this rotating casing. Fig. 1 shows an auger screw disposed in 1. The outer excavation mechanism 4 connected to the rotating casing 1 includes a steel pipe coupling 5 connecting the upper end of the casing 1, a hollow rotating shaft 6 continuous to this, motors 7, 7', and a hollow rotating shaft 6 connected to the upper end of the casing 1. It consists of a transmission mechanism 8 that connects the shaft 6. The transmission mechanism 8 has a housing on a base, and uses a speed reduction mechanism as necessary.
are fixed on the left and right sides of the housing of the transmission mechanism 8. Further, an earth removal coupling 6 is attached to the middle of the hollow rotating shaft 6.

On the other hand, the inner digging mechanism 10 connected to the auger screw 3 includes a coupling 11 that connects the upper end of the screw 3, a deceleration transmission mechanism 12 on the upper part, and a motor 13. The mechanism 8 is supported by cylinders 14 and 14' erected on the housing so that its vertical position can be adjusted. In addition, coupling 1
The upper part of the auger screw 3 is equipped with a swivel 15, and the connection port 20 of the injection hose and the inside of the hollow shaft of the auger screw 3 communicate with each other via the swivel 15. A spout 16 is formed.

Incidentally, stirring blades 17 are horizontally bored at appropriate locations from the inner surface of the rotating casing 1 toward the center, and the tips of the stirring blades 17 overlap with the tips of the screws 18 of the auger screw 3 in the vertical direction. I tried to let them do it. This stirring blade 17
It is desirable that the tip be blade-shaped with a sharp tip.

On the other hand, in Auger Screw 3, Screw 1
Reference numeral 8 is provided discontinuously between the head 3a at the tip and its vicinity, and a horizontal stirring blade 19 is protruded from the part where the screw 18 is not provided, and the tip thereof and the tip of the stirring blade 17 are also disposed discontinuously. Polymerization was carried out in the same manner.

Although not shown in the drawings, the entire apparatus is suspended by a wire from the top sheave of a leader mast which is provided on a construction vehicle and is movable up and down.

Next, to explain how to use and function, the casing 1 is driven by an outer digging mechanism 4 driven by motors 7 and 7', and the auger screw 3 is driven by an inner digging mechanism 10 driven by a motor 13. It is rotated in the same direction and excavates underground. At the same time, if cement milk is injected from the connection port 20 via an injection hose (not shown), the cement milk will come out from the spout 16 at the tip and be sent upward together with the earth and sand excavated by the casing head 1a and the auger head 3a. Stirring blade 17 and 1
The soil is mixed to form soil concrete in step 9, and the remaining soil is discharged from the soil removal coupling 9. The relative positions of the casing head 1a and the auger head 3a can be adjusted using cylinders 14 and 1.
4'.

Furthermore, even if objects such as pieces of wood get in together with earth and sand, these stirring blades 17, 19 and screws 18 are disposed in a polymerized manner, so that they can be cut into powder.

If the entire device is pulled up in this way, a pile hole filled with soil concrete can be obtained;
The cement milk may be injected at the time of lifting the device.

[Effect of idea]

As described above, the excavation equipment of the present invention can efficiently excavate with double excavation using the outer casing and the inner earth auger, and can also reliably stir cement milk and soil to obtain high-quality soil concrete. It is possible. In addition, it can also be used to break pieces of wood, making it convenient and hassle-free.

[Brief explanation of drawings]

The figure is a partially cutaway front view showing an embodiment of the excavation device of the present invention. DESCRIPTION OF SYMBOLS 1...Steel pipe rotating casing, 1a...Casing head, 2...Drilling blade, 3...Auger screw, 4...Outer drilling mechanism, 5...Steel pipe coupling, 6...Hollow rotating shaft, 7, 7' ……motor,
8...Transmission mechanism, 9...Earth removal coupling, 10
...Inner excavation mechanism, 11...Cup ring, 12
...Deceleration transmission mechanism, 13...Motor, 14,1
4'...Cylinder, 15...Swivel, 16...
...pouring port, 17, 19... stirring blade, 18... screw, 20... connection port.

Claims (1)

[Scope of utility model registration request] An excavation system that combines a rotating casing connected to an outer excavation mechanism and provided with a digging blade at its tip, and an auger screw connected to an inner excavation mechanism, and equipped with a mechanism for pouring out cement milk, etc. from the tip of the auger screw. An excavation device characterized in that a stirring blade is provided protruding from the inner surface of the rotating casing, and the tip of the stirring blade is overlapped with the tip of the screw of the auger screw with an interval in the vertical direction.