JP3048609U - Auger drilling equipment - Google Patents

Abstract

(57) [Summary] [Problem] To drill a hole while suspending an auger with a crane. An electric motor with a speed reduction mechanism is housed in a housing of a rotation drive unit suspended by a crawler crane.
The auger screw shaft 7 is passed through a cylindrical casing 6 mounted below the rotation drive unit, and the upper end of the screw shaft 7 is connected to the output shaft of the electric motor 2. An auger head 9 having a cutting bit 9a is attached to the tip of the screw shaft 7. The auger head 9 protrudes from under the cylindrical casing 6 and has an outer diameter slightly larger than the outer diameter of the cylindrical casing 6. Mount 11 on the ground where the hole should be drilled
Is set horizontally, and the positioning frame 12 is placed thereon. The positioning frame is made of four frames 12a (also an H-section steel), and is mounted on the gantry 11 in a cross-girder shape. The cylindrical casing 6 is sandwiched between these four rods 11a from all sides,
Using a clamp, the lower rod is fixed to the gantry, and the upper rod is fixed to the lower rod. A guide groove 14 is formed inside each rod 12a, and a guide member 15 engaged with this groove is vertically welded to the cylindrical casing 6.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a drilling device using an auger.

[0002]

[Prior art]

 When drilling holes in the ground to construct foundation piles, a method of drilling by attaching an auger to the leader of the leader machine has been conventionally used. In such a case, when the number of holes to be drilled is large, the work efficiency is poor because the leader machine must be moved from hole to hole. In addition, since the leader machine cannot be placed in narrow places or on slopes, the places where holes can be dug are limited.

[0003]

[Problems to be solved by the invention]

 The purpose of this invention is to drill holes while the auger is hung by a crane, so that holes can be drilled anywhere within the crane's arm turning area.

[0004]

[Means for Solving the Problems]

 A cylindrical casing is hung below the rotary drive suspended from the crane arm. An auger screw shaft is passed through this cylindrical casing, and the upper end thereof is connected to a motor incorporated in a rotary drive unit. The motor may be electric or hydraulic. The auger head attached to the end of the auger screw shaft projects from the lower end of the cylindrical casing. A positioning frame for sandwiching the cylindrical casing is provided on the ground on which the hole is made, and a guide groove is formed inside the frame, and a guide member engaging with the guide groove is vertically fixed to the outer peripheral surface of the cylindrical casing. The outer diameter of the auger head is preferably larger than the outer diameter of the cylindrical casing including the guide member.

[0005]

[Embodiment of the invention]

 In FIG. 1, reference numeral 1 denotes a rotary drive unit, and an electric motor 2 having a speed reduction mechanism is housed in a housing 1a of the rotary drive unit. The rotary drive unit 1 is hoisted by a crane (crawler crane) 3 mounted on a truck with tracks. Reference numeral 4 denotes a sling.

The cylindrical casing 6 is attached to the lower surface of the rotation drive unit 1 by bolts. An auger screw shaft 7 having a spiral blade on the peripheral surface is passed through the cylindrical casing 6, and the upper end of the screw shaft 7 is connected to the output shaft of the electric motor 2. An auger head 9 having a cutting bit 9a is attached to the tip of the screw shaft 7. The auger head 9 protrudes from below the cylindrical casing 6 and has an outer diameter slightly larger than the outer diameter of the cylindrical casing 6 (the outer diameter including a square bar 15 described later).

As shown in FIG. 2, a gantry 11 made of two H-beams is horizontally installed on the ground on which a hole is to be excavated, and a positioning frame 12 is placed thereon. The positioning frame is made of four frame bodies 12a (also an H-shaped steel), and is mounted on the gantry 11 in a cross-girder shape. These four rods 11a sandwich the cylindrical casing 6 from all sides, and the clamps 13 are used to fix the lower rod to the gantry and the upper rod to the lower rod. A guide groove 14 is formed inside each rod 12a, and a guide member (square bar) 15 engaging with this groove is vertically welded to the cylindrical casing 6.

In order to excavate a hole with this device, the drilling device is suspended vertically by a crane, the lower end is inserted between the pedestals 11, and the cylindrical casing 6 is held by the positioning frame 12 fixed on the pedestal. At this time, the guide member 15 with the cylindrical casing is engaged with the guide groove 14 of the rod 12a.

In this way, the electric motor 2 is started and the auger 7 is driven to rotate. When the auger turns and excavates the rock with the auger head 9, the rotary drive 1 and the cylindrical casing 6 try to turn in the opposite direction due to the reaction. However, since the guide member 15 fixed to the cylindrical casing 6 is engaged with the guide groove 14 of the positioning frame 12, the cylindrical casing 6 and the drive unit 1 do not rotate.

[0010] In this way, the auger rotates while the drilling device is suspended by the crane, and digs and cuts the ground. Since the auger head 9 is larger in diameter than the cylindrical casing 6, a hole larger than the diameter of the cylindrical casing is dug, so that the cylindrical casing 6 can easily enter the hole. The excavated waste is sent upward by the auger screw 7 and discharged to the outside through an earth discharging hole 16 formed in the upper part of the cylindrical casing 6.

When a hole having a desired depth is formed, the hole is lifted by the crane 3 and the drilling device is pulled out from the hole. Since a hole larger than the cylindrical casing is dug as described above, a large force is not required to pull out the drilling device.

[0012]

[Effect of the invention]

 As described above, in the drilling device of the present invention, a positioning frame was installed on the ground, a guide groove was formed inside the positioning frame, and a guide member engaging with the groove was attached along the cylindrical casing. In addition, when the auger head drills, rotation of the cylindrical casing due to recoil can be suppressed, and therefore, it is possible to excavate a hole while being suspended by a crane. In addition, since the cylindrical casing is positioned by the positioning frame, a hole can be dug at an accurate position despite being hung by the crane.

[0013] Since drilling is performed while being hung by a crane as described above, the bogie of the crane can be dug without moving, as long as the bogie of the crane can be reached. Work efficiency is good. In addition, it is convenient to extend the crane's arm so that a hole can be dug even in a narrow place.

[0014] Further, since the outer diameter of the auger head is made larger than the outer diameter of the cylindrical casing (claim 2), the cylindrical casing can easily enter the hole excavated by the auger head only by its own weight, Smooth excavation is possible, and no large force is required when pulling out the equipment later.

[Brief description of the drawings]

FIG. 1 is an elevation view of a drilling rig.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotation drive part 2 Motor 3 Crane 6 Cylindrical casing 7 Auger screw 9 Auger head 12 Positioning frame 14 Guide groove 15 Guide member

Claims (2)

[Utility model registration claims] 1. A rotary drive suspended from an arm of a crane, a cylindrical casing extending downward from the rotary drive, a motor incorporated in the rotary drive, and a rotary drive driven by the motor. An auger screw shaft passing through the inside of the cylindrical casing, an auger head attached to the tip of the auger screw shaft and protruding outward from the lower end of the cylindrical casing, and a position provided on the ground for defining the position of the cylindrical casing. An auger drilling device comprising: a positioning frame; and a guide member vertically engaged with an outer peripheral surface of the cylindrical casing, the guide member engaging with a guide groove formed inside the positioning frame. 2. The auger drilling device according to claim 1, wherein the outer diameter of the auger head is larger than the outer diameter of the cylindrical casing.