JP2018053478A - Drilling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drilling machine which can implement no discharge drilling effectively in a work space with a clearance.SOLUTION: A drilling machine comprises an auger 21 which enables no discharge drilling by installing screw sections 213a, b discharging a drilled soil upward and a compaction trowel plate 214 putting the discharged soil pushed up by the screw sections to a hole wall, into a boring rod 211 disposing a drilling bit 212 on top, and a mast 15 installed to a proper machine body 1 to which a drilling mechanism 2 comprising a rod driving section 22 to which the auger is installed perpendicularly is attached with a free vertical motion at a position where the auger can be grounded, an expansion leg 3 of a hydraulic drive which controls a vertical movement of the drilling mechanism from the uppermost position for mast attachment to the lowest position for mast attachment is installed to a position outside of an outer peripheral surface of the auger at the rod driving section.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an excavation apparatus that performs drilling in a place where work space (particularly upper space) is limited.

  For drilling larger diameters than drill holes, the boring hole method is known in which drilling is carried out while rotating a boring rod with a bit at the tip, and the excavated sediment is discharged by supplying water or mud flow. The machine is an apparatus called a boring machine, and can be a compact apparatus in existing excavation methods (Patent Documents 1 and 2).

  In addition, as a device that realizes no soil excavation holes, a drilling bit is provided on the boring rod provided with a compacting iron plate that discharges the excavated soil upward and presses the discharged soil against the hole wall to form a compacted hole wall. An apparatus provided with an auger is known (Patent Documents 3 and 4).

JP-A-5-98878. Japanese Patent Application Laid-Open No. 11-190185. Japanese Patent Laid-Open No. 7-305587. JP-A-9-328985.

  In drilling work by a boring machine, in addition to the excavating device (boring machine), a water flow pump and a drainage mud filtering device are essential for soil removal, and there is also a problem that work efficiency (digging speed) is slow.

  On the other hand, in the non-excavated drilling method, there is no need to treat the discharged soil, and the drilling operation can be performed with a simple configuration. However, the boring rod and the drive mechanism constituting the excavator have a corresponding weight. . The excavation structure of the excavator is mounted on a mast provided on the traveling machine body so as to be movable up and down, and the vertical movement control is performed by a suspension mechanism mounted on a crane or the traveling machine body. It is limited to the range in which the vertical movement control by the lowering mechanism is possible. In other words, the extra height (the height that needs to be added to the effective excavation work height) necessary for the height range that requires the lifting mechanism is required. Thus, when the operating height of the apparatus to be used is limited, the excavation apparatus for forming no earth excavation using the conventional suspension control cannot be used efficiently.

  Therefore, the present invention proposes a new excavator that can efficiently carry out excavation-free drilling work even when the work space (working allowable height) is limited.

  The excavating apparatus according to claim 1 of the present invention is a compacting iron that presses a screw portion for discharging excavated soil upward and a discharged soil pushed up by the screw portion against a bore wall with a drilling bit provided at a tip thereof. An excavation mechanism consisting of an auger with a plate to form an earthless drilling hole and a rod drive unit with the auger suspended, can be moved up and down at a position where the auger can be grounded on the mast provided on an appropriate machine body And a hydraulically driven telescopic leg for controlling the excavation mechanism to move up and down from the mast mounting uppermost position to the mast lowest mounting position. Features.

  Thus, the excavating mechanism is arranged at the drilling hole with the excavating mechanism supported at the uppermost position by the telescopic legs, and the vertical movement of the excavating mechanism is controlled by operating the supporting leg while rotating the excavating mechanism. The excavation mechanism makes no soil excavation.

  Therefore, the excavator does not need to be provided with a structural member for driving the excavation mechanism up and down, and the uppermost position of the mast is the height limit of the work space. By using an excavator equipped with a high height, it is possible to efficiently carry out soil-free drilling work.

  The excavation apparatus according to claim 2 of the present invention is characterized in that in the apparatus, the airframe has a traveling function, a mast is provided in front of the airframe, the excavation mechanism is mounted in a protruding state outside the airframe, and the airframe is at the uppermost position of the mast. The excavating mechanism with the auger floating from the ground surface and the fixing mechanism for connecting and fixing the mast are provided.

  Therefore, after extending the support leg and lifting the excavation mechanism to the uppermost position of the mast and fixing the excavation mechanism to the mast, the grounding type support leg is shortened to be in a non-grounded state by shortening the support leg. It is possible to move, and digging work at close positions can be continuously performed.

  According to a third aspect of the present invention, there is provided an excavating apparatus according to the present invention, wherein the excavator is provided with an auger detachably on the rod driving portion and an extension rod for connecting the auger and the rod driving portion. If the drive stroke (drilling depth by the auger alone) is shorter than the construction drilling depth, the connection between the auger and the rod drive unit is released, the rod drive unit is raised and fixed, and the extension rod is fixed to the rod drive unit After connecting to the auger, the auger and the extension rod are connected to perform a drilling operation, so that a drilling hole having a desired depth can be formed.

  The configuration of the present invention is as described above, and the vertical movement control of the excavation mechanism for performing the excavation-free drilling operation is performed by the telescopic legs attached to the excavation mechanism, and above the mast to which the excavation mechanism is mounted. In addition, an operation structure such as a lifting mechanism is not required, and the soilless drilling work can be efficiently performed even in a work space with a height restriction.

1 is an overall view (side view) of an embodiment of the present invention. In the side view for explaining the drilling operation, (a) shows the time of excavation and (b) shows the time of excavation. The front view shows the aircraft running. In the figure, (A) shows the time of excavation, and (B) shows the time of excavation.

  Next, an embodiment of the present invention will be described. The excavation apparatus shown in the embodiment includes an airframe 1, an excavation mechanism 2 attached to the airframe 1, and an extendable leg 3 attached to the excavation mechanism 2.

  The airframe 1 is provided with a traveling portion 11 and can be traveled, and is provided with a support leg 12 so that it can be stably installed. A mast 15 provided with a vertical rail 14 is erected in front of the airframe body 13.

  The ground height of the mast 15 is set to 4 m, and if this height is suppressed, it can be applied to general civil engineering work under the bridge or in the underground space.

  The excavation mechanism 2 includes an auger 21 and a rod drive unit 22. The auger 21 is provided with a excavation bid 212 at the tip of a boring rod 211 that is detachably provided on the rod drive unit 22, and a spiral plate shape continuous from the excavation bit 212. The screw part 213a and the screw part 213b provided in the boring rod 211 are provided, and a compacting iron plate 214 that presses the discharged soil against the hole wall is provided above the screw part 213b.

  The rod drive unit 22 includes a drive unit 221 that rotationally drives the boring rod 211, a guide unit 222 that is attached to the rail 14 to allow the drive unit 221 to move up and down along the rail 14, and the drive unit 221 to the mast 15. A fixing mechanism 223 for fixing is provided. The fixing mechanism 223 may employ any structure as long as it is a connecting and fixing means such as a receiving cylinder provided on the mast 15 side and a hydraulic cylinder that advances into the receiving cylinder.

  The telescopic legs 3 are provided on both sides of the rod drive unit 22 and are composed of a hydraulic cylinder (first stage in the illustrated example) provided with a one-stage or two-stage piston rod 31 that protrudes and descends downward. Is matched with the movable stroke length of the rod drive unit 22. At the lowermost end of the further piston rod 31, a grounding foot plate 32 that can stably ground is provided.

  Thus, the self-propelled excavator shown in the above embodiment travels to the work space with the rod driving unit 22 fixed at the uppermost position of the mast by the fixing mechanism 223, and the machine body 13 at the work location (drilling location). Is stably stopped by the support leg 12, and the auger 21 is connected and fixed to the rod driving unit 22. Of course, the airframe 1 may be run with the auger 21 attached.

  In this state, the hole drilling operation is performed at the relevant location. First, the piston rod 31 of the telescopic leg 3 is extended, and the grounding foot plate 32 is set outside the hole drilling range to lift the rod driving unit 22 ( As a state in which the fixing mechanism 223 is operable at the fixing position), the fixing mechanism 223 is released from being fixed.

  When the rod drive unit 22 is operated to rotate the auger 21 and the piston rod 31 of the telescopic leg 3 is shortened, the entire excavation mechanism 2 descends as the excavation of the drill hole A proceeds, and the rod drive unit 22 Finish the drilling operation at the lowest position. In particular, in the drilling operation, the excavation bit 212 is ground excavated in the same manner as the conventional non-excavated excavation drill, the excavated excavation is sent upward by the screw parts 213a and b, and the hole wall is formed by the compacted iron plate 214. The discharge hole is realized by being pressed to form a consolidated hole wall.

  When the rod driving unit 22 reaches the lowest position, the drilling operation is finished. However, when the drilling hole A is to be formed deeper, the auger 21 and the rod driving unit 22 are disconnected and expanded or contracted (not shown). The rod driving unit 22 is lifted by the extension of the leg 3, and the drilling operation is continued with the extension rod interposed.

  When the drilling operation is completed, the extendable leg 3 is extended to lift the rod drive unit 22 and the fixing mechanism 223 is operated at the uppermost position to fix the rod mechanism unit 22. Then, the piston rod 31 of the extendable leg 3 is moved to the cylinder. Then, the work is carried out again after moving to the next drilling location, or the auger 21 is removed and the machine body 1 is run to move to another work location.

DESCRIPTION OF SYMBOLS 1 Airframe 11 Traveling part 12 Supporting leg 13 Airframe main body 14 Rail 15 Mast 2 Excavation mechanism 21 Auger 211 Boring rod 212 Excavation bid 213a, 213b Screw part 214 Consolidation iron plate 22 Rod drive part 221 Drive part 222 Guide part 223 Fixing mechanism 3 Expansion / contraction Leg 31 Piston rod 32 Grounding foot plate

Claims (4)

  An auger with a drilling bit provided at the tip, a screw part that discharges the excavated soil upwards, and a compacting iron plate that presses the discharged soil pushed up by the screw part against the hole wall to form a soilless hole The excavating mechanism composed of the rod drive unit with the auger suspended is mounted on a mast provided on an appropriate machine body so that the auger can move up and down at a position where the auger can be grounded, and the excavating mechanism is installed at the uppermost position of the mast. The excavator is characterized in that a hydraulically-driven telescopic leg for vertically moving control from the position to the lowest mast mounting position is provided at a position outside the outer surface of the auger in the rod drive unit.   The fuselage has a traveling function, and a mast is provided in front of the fuselage to mount the excavation mechanism in a protruding state, and the excavation mechanism and mast with the auger floating from the fuselage ground plane at the top of the mast are connected and fixed. The excavator according to claim 1, further comprising a fixing mechanism.   The excavation mechanism according to claim 2, wherein the auger is detachably provided on the rod drive unit, and further includes an extension rod for connecting the auger and the rod drive unit.   The excavator according to any one of claims 1 to 3, wherein a mast height provided in the airframe is set to be 4 m or less above the ground.