JPH052078B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a drilling device, and particularly to a drilling device capable of drilling a hole perpendicular to a slope.

(Conventional equipment) When it is necessary to drill holes for the purpose of driving foundation piles, retaining piles, etc. in slope-like topographic areas other than flat areas, a temporary pier 2 is constructed on the slope 1 as shown in Figure 6. Alternatively, as shown in FIG. 7, the earth and sand on the slope 1 is excavated in stages, and a rotary or rotary impact type hole drilling machine 3 is mounted and fixed thereon to drill holes.

The temporary construction work for this drilling is based on the size of the drilling machine 3,
Although the scale varies depending on the drilling specifications, etc., it may account for 20 to 30% of the total construction work, and this percentage will increase even more, especially if the length of each hole to be drilled is relatively shallow.

(Object of the Invention) An object of the present invention is to obtain a drilling device that eliminates the above-mentioned drawbacks.

(Structure of the Invention) A drilling device of the present invention includes a rotary drive section, a rotary output shaft extending downward from the rotary drive section, a drilling tool provided at the lower end of the rotary output shaft, and a rotary output shaft of the rotary output shaft. a non-rotating outer cylinder extending downward by a predetermined length from the rotary drive unit so as to be fitted to the outer periphery of the non-rotating outer cylinder with a gap therebetween; a fixing protrusion protruding from the outer periphery of the lower end of the fixed sleeve tube; a band-shaped protrusion provided on the inner circumferential surface of the fixed sleeve tube so as to extend downward from the upper end; It is characterized by comprising a stopper protruding from the outer peripheral surface of the lower end of the non-rotating outer cylinder.

(Example of the invention) Embodiments of the present invention will be described below with reference to the drawings.

In the present invention, as shown in FIG. 1, a crane 4 is used, and a hole drilling device 7 is suspended from the crane boom 5 of the crane 4 via a rope 6, and the hole needs to be drilled by this hole drilling device 7. A hole is provided on the slope 1.

As shown in FIGS. 2 and 3, the drilling device 7 of the present invention includes a rotary drive section 8 suspended by a rope 6 of a crane 4, and a rotary output shaft 9 extending downward from the center of the rotary drive section 8. and a drilling tool 10 such as a button bit provided at the lower end of the rotation output shaft 9,
a non-rotating outer cylinder 11 that extends downward by a predetermined stroke length from the rotary driving part 8 so as to be fitted onto the outer periphery of the rotational output shaft 9 of the rotary driving part 8 with a slight gap; and this non-rotating outer cylinder. The length of the rotary output shaft 9 that is fitted onto the outer periphery of the rotary output shaft 9 with a slight gap
A fixed sleeve pipe 12 that is shorter by a predetermined stroke length, a pair of fixed arms 13 provided on the outer periphery of the lower end of the fixed sleeve pipe 12 so as to extend horizontally from positions spaced apart from each other by, for example, 180°, and the fixed sleeve pipe 12. Cuttings discharge port 14 provided at the bottom of
and a band-shaped protrusion 15 provided on the inner circumferential surface of the fixed sleeve tube 12 so as to extend downward by a predetermined stroke length from the upper end thereof and protrude inwardly at positions separated by, for example, 180 degrees from each other, and a side surface of the band-shaped protrusion 15. The stoppers 16 are provided on the outer circumferential surface of the lower end of the non-rotating outer cylinder 11 at positions 180 degrees apart from each other and protrude outward so as to engage with the stoppers 16.

Since the drilling device of the present invention has the above-mentioned configuration, when using it, first, a space is manually dug at the drilling point on the slope 1 to the extent that the fixed sleeve pipe 12 stands vertically, and then the fixed arm 13 is placed on the slope 1. Dig an engagement groove by hand to a width that can be accommodated on the contour line.

Next, the drilling device 7 is suspended by the crane 4 via the rope 6, the drilling tool 10 is installed at the drilling point, and the fixed arm 13 of the drilling device 7 is placed in the engagement groove.
are engaged, and in this state, the rotation drive unit 8 is driven.

As a result, the non-rotating outer cylinder 11 also rotates together with the rotation of the rotary output shaft 9, but the stopper 16 of the non-rotating outer cylinder 11 is connected to the band-shaped protrusion 15 of the fixed sleeve tube 12.
In the state in which the non-rotating outer cylinder 11 is engaged, the rotation of the non-rotating outer cylinder 11 is stopped, and the rotation of the rotary output shaft 9 is transmitted to the drilling tool 10.

Drilling is started by rotation of the drilling tool 10,
The cuttings accompanying the drilling are discharged from the lower end opening of the fixed sleeve pipe 12 through the cuttings discharge port 14 along with water, muddy water, or pressurized air.

As drilling progresses, the rotary drive unit 8 as well as the drilling tool 10 descend relative to the fixed sleeve pipe 12.
One stroke of drilling is completed just before the upper end of the fixed sleeve tube 12 comes into contact with the lower end of the rotary drive part 8. That is, the distance between the lower end of the rotary drive unit 8 and the upper end of the fixed sleeve tube 12 in the initial state of drilling and the length of the band-like projection 15 formed on the inner circumferential surface of the fixed sleeve tube 12 correspond to one stroke of drilling. Determine length.

In another embodiment of the present invention, as shown in FIGS. 4 and 5, a pair of fixed arms 13 are fixed to the outer periphery of a ring 17 fitted to the outer periphery of the lower end of the fixed sleeve tube 12. By engaging a concave groove 18 formed on the inner peripheral surface with a protruding rib 19 provided axially on the outer periphery of the lower end of the fixed sleeve tube 12, the ring 17 is moved in the circumferential direction relative to the fixed sleeve tube 12. Although it does not rotate in the axial direction, it can slide freely by a predetermined length in the axial direction.

According to this embodiment, since the fixed arm 13 can be moved by a predetermined length in the axial direction relative to the fixed sleeve tube 12, initial setting of the drilling device 7 with respect to the slope 1 is facilitated.

(Effects of the Invention) As described above, according to the drilling device of the present invention, there is no need to construct a temporary pier, etc., and it is possible to drill holes extremely easily at any location.
Since it is not fitted into the fixed sleeve tube 12, there is a great advantage that it can be of any size depending on the application.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the installation situation of the drilling device of the present invention,
Fig. 2 is a front view of the drilling device of the present invention, and Fig. 3 is a front view of the drilling device of the present invention.
4 is a front view of essential parts of a drilling device in another embodiment of the present invention, and FIG. 5 is a sectional view taken along line AA in the figure.
The cross-sectional view taken along the line B--B in the figure, FIGS. 6 and 7 are explanatory diagrams of the conventional device, respectively. 1...Slope, 2...Temporary pier, 3...Drilling machine,
4...Crane, 5...Crane jib, 6...Rope, 7...Drilling device, 8...Rotary drive unit, 9...
...Rotating output shaft, 10...Drilling tool, 11...Non-rotating outer cylinder, 12...Fixed sleeve tube, 13...Fixed arm, 14...Cut discharge port, 15...Strip-shaped protrusion, 16... Stopper, 17...Ring, 18
...Concave groove, 19...Protruding rib.

Claims (1)

[Scope of Claims] 1. A rotary drive unit, a rotary output shaft extending downward from the rotary drive unit, a drilling tool provided at the lower end of the rotary output shaft, and a hole-drilling tool provided on the outer periphery of the rotary output shaft with a gap therebetween. a non-rotating outer cylinder extending downward by a predetermined length from the rotary drive unit so as to be fitted therein; a fixed sleeve pipe fitted to the outer periphery of the non-rotating outer cylinder through a gap; and a lower end of the fixed sleeve pipe. a fixing protrusion protruding from the outer periphery; a band-shaped protrusion provided on the inner circumferential surface of the fixed sleeve tube so as to extend downward from its upper end; A hole drilling device comprising a stopper protruding from the outer peripheral surface of the lower end. 2. The drilling device according to claim 1, wherein the protrusion does not rotate around an axis on the outer periphery of the lower end of the fixed sleeve tube, but is movable in the axial direction.