JP2589272B2 - Drilling rig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavator using a down-the-hole hammer.

[0002]

2. Description of the Related Art A down-the-hole hammer having a striking head by air is suitable for drilling a hard ground such as a rock, a slime treatment is sure, and a pile capable of smoothly inserting a steel pipe pile, an H-shaped pile, or the like. A hole is obtained. The down-the-hole hammer is usually set on a three-point pile driver having a leader.

[0003] However, there are places where a three-point pile driver cannot be loaded or installed under a bridge, under a high-voltage line, in a tunnel, in a shaft, or the like, in which case a down-the-hole hammer cannot be used.

On the other hand, there has been proposed an excavator in which a rotating device 1 as shown in FIGS. 3 and 4 is combined with a down-the-hole hammer 2. The down-the-hole hammer 2 has a hammer head 2a attached to the tip and a casing 3 disposed around a shaft thereof. The casing 3 is provided with a groove 3a for engagement.

The rotating device 1 includes the casing 3
A center hole rotating body 5 having a clutch mechanism 4 for the groove 3a on the hole surface is provided. In the drawing, reference numeral 6 denotes a motor for rotating the center hole rotating body 5, and reference numeral 7 denotes a speed reducer.

[0006] The rotating device 1 is installed on the core of the pile with a crane or the like, and the weight 8 is attached. Then, the down-the-hole hammer 2 is inserted into the center hole by a crane from above, and the groove 3 a of the casing 3 is engaged with the clutch mechanism 4. The compressor 9 and the receiver tank 10 are connected in advance.

Then, the compressor 9 is operated to send air to the down-the-hole hammer 2 to start hitting. At the same time, the motor 6 is driven by the hydraulic unit 11 driven by the generator 12, and the center hole is rotated via the speed reducer 7. Body 5
, And the down-the-hole hammer 2 is also rotated to perform drilling. The earth and sand excavated by the hammer head 2a rises around the casing 3 and is discharged.

[0008]

In the excavator shown in FIGS. 3 and 4, since the drilling by the rotating device 1 is limited to the excavation diameter of the down-the-hole hammer, it is impossible to excavate a large-diameter hole. It is.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to provide a down-the-hole hammer in which a casing is disposed around a shaft and a center-hole rotating body having a clutch mechanism on the outer surface of the casing. An object of the present invention is to provide an excavating apparatus including a drilling apparatus, which is capable of easily forming a large-diameter hole required for construction of a steel tower foundation, a pier foundation, and the like.

[0010]

According to the present invention, in order to achieve the above object, a ring rail is formed at the upper end of a cylindrical base, and a movable rail holder having a horizontally long opening is slidably movable on the ring rail. The gist of the invention is that the rotating device is engaged with the cylindrical base so as to hang on the diameter of the cylindrical base, and the rotating device is movably mounted on the movable rail holder along the horizontally long opening.

[0011]

According to the present invention, the rotating device is movably arranged on the movable rail holder along the horizontally long opening, so that the down-the-hole hammer excavates by moving its position linearly on the diameter of the cylindrical base. be able to. Since the moving rail holder itself can be rotated 360 ° by the ring rail, the circular portion in the cylindrical base becomes a place where the down-the-hole hammer can move without leaving any space, and a large-diameter hole can be formed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing one embodiment of the excavator of the present invention, and FIG. 2 is a plan view of a cylindrical base and a movable rail holder.

In FIG. 1, reference numeral 13 denotes a cylindrical base having an outward grounding flange 13a formed at a lower end and a ring rail 14 formed at an upper end. The cylindrical base 13 may be assembled by fastening a set of divided bodies with bolts.

On the other hand, 15 is a moving rail holder,
A laterally elongated opening 16 is formed in the length direction, and the end is slidably engaged with the ring rail 14 so as to hang on the diameter of the cylindrical base 13 and guide the ring rail 14. As
360 ° horizontal rotation is possible.

The rotating device 1 of the excavator shown in FIGS. 3 and 4 does not have a weight or a lower base, and is provided with engaging flanges 17 on both sides of the moving rail holder 15 on the lower surface thereof. Then, the rotating device 1 is slidably mounted on the moving rail holder 15.

Then, the down-the-hole hammer 2 with the casing 3 is set in the rotating device 1 so as to protrude downward through the oblong opening 16 and excavation is performed.

The moving rail holder 15 is capable of rotating horizontally by 360 °, so that the down-the-hole hammer 2 can be rotated.
Also, the down-the-hole hammer 2 linearly moves its position on the diameter of the cylindrical base 13 by moving the rotating device 1 along the horizontally long opening 16 with respect to the moving rail holder 15. And excavate.

As a result, the circular portion in the cylindrical base 1 becomes a place where the down-the-hole hammer 2 can move without leaving any space, and a large-diameter hole can be drilled.

[0019]

As described above, the excavator of the present invention
In the excavation equipment consisting of a down-the-hole hammer with a casing arranged around the shaft and a rotating device with a center hole rotating body with a clutch mechanism on the outer surface of the casing, it is used for construction of steel tower foundations and pier foundations. The required large-diameter drilling can be easily performed.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of an excavator according to the present invention.

FIG. 2 is a plan view of a cylindrical base and a movable rail holder.

FIG. 3 is a side view showing a conventional example.

FIG. 4 is a plan view of the rotating device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotating device 2 ... Down-the-hole hammer 2a ... Hammer head 3 ... Casing 3a ... Groove 4 ... Clutch mechanism 5 ... Center hole rotating body 6 ... Motor 7 ... Reduction gear 8 ... Weight 9 ... Compressor 10 ... Receiver tank 11 ... Hydraulic unit 12 ... Generator 13 ... Cylindrical base 13a ... Grounding flange 14 ... Ring rail 15 ... Moving rail holder 16 ... Horizontal opening 17 ... Engagement flange

Claims (1)

(57) [Claims] An excavator comprising: a down-the-hole hammer having a casing disposed around a shaft; and a rotating device having a center hole rotating body having a clutch mechanism on the outer surface of the casing. A moving rail holder having a laterally long opening is slidably engaged with the ring rail at an upper end thereof, and the moving rail holder is slidably engaged with a diameter of a cylindrical base. An excavator, wherein the excavator is movably mounted along a horizontally long opening.