JP3258974B2 - Drilling rig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a drilling apparatus using a down-the-hole hammer drill (air hammer drill) or a screw auger.

[0002]

2. Description of the Related Art As is well known, a down-the-hole hammer drill moves a hammer up and down by the movement of a piston and excavates by hitting, and an auger has a well-known auger head having a cutting blade at its tip. The excavation is performed by rotating the screw shaft provided and inserting it into the ground in the form of a cone.

[0003] In each of these methods, a hole is drilled while being driven to rotate, and this is performed by suspending a rotary drive unit from a leader mast provided on a heavy machine such as a crawler and moving up and down.

[0004]

The leader mast serves as an elevating guide for a rotary drive unit and the like, and is used to secure stable elevating of the down-the-hole hammer drill and the auger. It is difficult to move heavy machinery, and there is a problem that work efficiency is poor when the number of holes to be excavated is large and frequent movement is required.

[0005] Therefore, if the crane is used by hanging it with the boom of the crane, the movement can be performed by turning the boom even when the holes to be drilled are continuous, and the movement becomes efficient. However, since it becomes a suspension bearing with a wire, the stability is poor, and the portion below the rotary drive part largely swings, and vertical excavation accuracy cannot be secured.

As shown in FIG. 7, a boom 19 of a jib crane 19 (crawler crane) is used to prevent such vibration.
There is a method of stopping the rotary drive unit 1 to be lifted by the hook 3 of the crane hanging from the a with an anchor wire (stay) 18 hooking an end to a weight 17 on the ground. It requires more space, takes up space, is cumbersome to install, and has poor mobility.

FIG. 7 shows a case where a down-the-hole hammer drill is used. The cylindrical casing 6 is hung in a non-rotating state by being connected to the lower surface of the housing of the rotary drive unit 1 by bolts. The head 9a was exposed from the tip through a drill shaft and a down-the-hole hammer drill. In this way, by inserting the casing 6 into the ground in a non-rotating state, the collapse of the hole wall can be prevented.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art by connecting a down-the-hole hammer drill or an auger drill rod to a rotary drive suspended from a crane, and attaching the outer periphery of the rotary drive to the rotary drive in a non-rotating state. In an excavator surrounded by a casing, it is possible to secure the ease of movement so that the excavator can be excavated anywhere within the turning range of the crane boom, and to provide a guide member without providing a troublesome detent means such as extending a stay around the device. Excavation can be performed while maintaining vertical accuracy, and guide members can be installed easily and quickly, and can be easily modified. An object of the present invention is to provide a drilling rig.

[0009]

According to the present invention, in order to achieve the above object, a down-the-hole hammer drill or an auger drill rod is connected to a rotary drive suspended from a crane, and the outer periphery of the drill is connected to the rotary drive in a non-rotating state. In the excavator surrounded by the casing attached in the above, engaging ridges or engaging grooves are formed in the outer periphery of the casing in the length direction,
Two counterweights are connected with a connecting plate at an interval
This secures a penetrating part between the two, and this penetrating part
The engaging projections or engaging grooves formed in the casing are engaged. <br/> A counterweight formed with the engaging recesses or engaging projections is used as a guide member so that the casing penetrates and is lifted up and down freely by a wire or the like. Support, this guide member is provided with a sharp tip protruding leg so as to pierce the ground,
In addition, the gist of the present invention is that the protruding legs extend and contract.

According to the first aspect of the present invention, the guide member is a counterweight which is suspended and supported by a wire or the like in a state in which the casing penetrates, and which has a protruding leg with a sharp tip so as to pierce the ground. In a state where the casing surrounding the excavation rod is vertically erected on the ground, the wire and the like hanging the guide member are loosened, and the guide member is lowered along the casing while the rotation drive unit and the crane are suspended and supported by a crane. Then, the protruding legs can be easily installed by piercing the ground.

Since the excavation is performed by engaging a casing surrounding the excavation rod with a guide member installed on the ground, the entire swing, rotation, inclination, etc. of the casing including the rotation drive unit at the upper end of the casing are reduced. This is performed while keeping the accuracy vertically with the casing while only the drill rod is rotated by the rotary drive.

Further, at the time of movement, the guide member may be lifted so as to pull out the projecting leg from the ground first, and may be moved together with the casing. The guide member may be lifted and moved. In either case, the lane boom can be swung and moved.

Further, the installation state of the guide member can be easily corrected by pulling up the guide member with a wire or the like, pulling out the protruding leg from the ground, lowering the guide member again while maintaining the correct posture, and pushing up the protruding leg. be able to.

According to the second aspect of the present invention, in addition to the above-described operation, the correction of the installation state of the guide member is performed only by the expansion and contraction of the protrusion leg itself without lifting the guide member and pulling the protrusion leg out of the ground. Can be easily corrected by correcting the inclination.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows one of the excavators of the present invention.
FIG. 2 is a side view showing the embodiment, and FIG. 2 is a view taken along line AA of FIG.

In FIG. 1, reference numeral 1 denotes a rotary drive unit in which a hydraulic or electric motor having a speed reduction mechanism is accommodated in a housing 1a, which is a jib crane 19 (crawler) mounted on a bogie equipped with caterpillars as shown in FIG. Hoisting with a crane boom 19a. 3 is a hook of a crane, and 5 is a sling.

FIG. 4 shows the configuration of the down-the-hole hammer drill. A drill shaft 7 is connected to the output shaft of the motor 2 of the rotary drive unit 1, and a head 9a having bits 9b scattered on the surface thereof is vertically moved by compressed air. A down-the-hole hammer drill 9 configured to reciprocate is provided, and compressed air for driving is taken in from outside via an air swivel (not shown) interposed at a connection portion between the drill shaft 7 and the motor 2. This is fed through the drill shaft 7.
In this embodiment, the drill shaft 7 is configured as a shaft (auger) having screw blades.

When a shallow hole is to be drilled, the drill shaft 7 may not be provided separately but may be a part of the body of the down-the-hole hammer drill 9.

According to the present invention, the casing 6 is hung in a non-rotating state by being bolted to the lower surface of the housing 1a of the rotary drive unit 1, and a drill shaft 7 and a down-the-hole hammer drill 9 are passed through the casing 6 so as to form a head. 9a was exposed from the tip. Thus, the drill shaft 7 of the down-the-hole hammer drill 9 is surrounded by the casing 6 suspended from the rotation drive unit 1.

A plurality of engaging projections 15 are provided on the peripheral surface of the casing 6 in parallel in the length direction at appropriate intervals. The engaging ridge 15 serves as a guide member, and can be formed by welding a square bar.

Further, on the peripheral surface of the casing 6, window holes 16 for discharging are formed in upper and lower stages and at appropriate intervals in the circumferential direction.

On the other hand, the guide member 11 is a counterweight in which a penetrating portion 21 through which the casing 6 penetrates is formed in the vertical direction at the center. In the present embodiment, two counterweights 20 are connected with a connecting plate 23 at an interval. By doing so, the penetration portion 21 was secured therebetween.

The penetrating part 21 is formed with an engaging recess 13 or an engaging protrusion for engaging the engaging ridge 15 or the engaging concave groove formed on the casing 6.

Further, the guide member 11 is provided with a suspension ring 26 on the upper surface of the weight 20, and is suspended and supported by a wire 22 or the like in a state where the casing 6 penetrates, and has a tip on the lower surface so as to pierce the ground. At least four sharply-pointed protruding legs 24 are provided at each of at least four corners, for a total of four or more.

The protruding legs 24 may be formed of a non-stretchable material such as a steel bar, but as another embodiment, may be formed of a stretchable material using a hydraulic or air cylinder.

Next, the usage will be described. In order to drill a hole, first, a drilling apparatus main body including a rotary drive unit 1, a casing 6, a drill shaft 7, and a down-the-hole hammer drill 9 is suspended vertically by a crane on the ground on which a hole is to be drilled.

At this time, the guide member 11 is suspended and supported by the casing 6 so as to penetrate the casing 6, and the guide member 11 is dropped first, and the projection leg 24 is pierced into the ground for installation.

As another embodiment, the guide member 11 may be installed on the ground first, and the casing 6 may be inserted into the guide member 11 later.

In this way, the down-the-hole hammer drill 9 is driven, and the rock is crushed and excavated by the head 9a which reciprocates up and down. At the same time, the motor 2 is started. The engaging ridge 15 fixed to the casing 6 serves as a guide member.
11, the casing 6 and the rotation drive unit 1 do not rotate, and the drill shaft 7 and the down-the-hole hammer drill 9 are slowly (for example, 15 rpm).
) And rotate.

When the down-the-hole hammer drill 9 rotates in this manner slowly, the pits 9b scattered on the surface of the head 9a hit a slightly different place without hitting the same place on the bedrock, thereby efficiently cutting the bedrock. Can be crushed. Further, the excavated scrap is blown up in the casing 6 together with the air discharged from the head 9a of the down-the-hole hammered drill, and is discharged outside through the window hole 16 formed in the casing 6.

In order to finish digging the hole and then move to the position where the hole is to be drilled, the body of the digging apparatus is suspended together with the guide member 11 and the body of the digging apparatus is moved by rotating the boom of the crane, or The casing 6 is removed from the member 11, and then the guide member 11 is pulled up and moved separately.

As the deformation of the guide member 11, various forms can be considered as long as it is an ornament formed of a steel box or a thick plate. A concave groove may be provided, and the guide member 11 may be formed with a projection that engages with the engaging concave groove. The engagement groove can be formed by welding two plates in parallel to the peripheral surface of the cylindrical casing.

The casing may be a rectangular casing other than the cylindrical casing 6.

FIG. 5 shows another embodiment in which an auger is used as an excavator. This auger is a well-known one. As shown in FIG. 6, a screw blade shaft 26 is connected to a rotary drive unit 1 as a drilling rod, and an auger head 28 having a drilling blade 27 is provided at the tip thereof.

Also in this case, the casing 6 is hung in a non-rotating state by being bolted to the lower surface of the housing 1a of the rotary drive unit 1, and the screw blade shaft 26 and the auger head 28 are passed through the casing 6 so that the auger head The tip of 28 was exposed from the tip of casing 6. In this manner, the casing 6 suspended from the rotary driving unit 1
Surround the outer circumference of 26.

The use of the guide member 11 is the same as the use of the down-the-hole hammer drill, and a detailed description thereof will be omitted.

[0037]

As described above, the excavator of the present invention
In a drilling rig in which a down-the-hole hammer drill or auger drilling rod is connected to a rotary drive suspended from a crane and the outer periphery of which is surrounded by a casing attached to the rotary drive in a non-rotating state, if it is within the turning range of the crane boom In addition to ensuring the ease of movement that can be excavated anywhere, the guide member can be used to prevent steadying without having to provide a troublesome detent means such as extending the stay around the equipment, and excavation while maintaining vertical accuracy In addition, the guide member can be installed easily and quickly, and can be easily modified, and is suitable for use in excavation on the water floor and the sea floor.

[Brief description of the drawings]

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

FIG. 2 is a view taken along the line AA of FIG. 1;

FIG. 3 is a side view showing a state before a guide member is installed in the first embodiment of the excavator of the present invention.

FIG. 4 is an exploded side view of the down-the-hole hammer drill.

FIG. 5 is a side view showing a second embodiment of the excavator according to the present invention.

FIG. 6 is an exploded side view of the auger.

FIG. 7 is a side view showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotation drive part 1a ... Housing 2 ... Motor 3 ... Hook 5 ... Sling 6 ... Casing 7 ... Drill shaft 9 ... Down-the-hole hammer drill 9a ... Head 9b ... Bit 11 ... Guide member 13 ... Engagement recess 15 ... Engagement ridge 16 ... window hole 17 ... weight 18 ... anchor wire 19 ... jib crane 19a ... boom 20 ... counterweight 21 ... penetrating part 22 ... wire 23 ... connecting plate 24 ... projecting leg 25 ... suspension ring 26 ... screw blade shaft 27 ... drilling blade 28 ... Auger head

Continuation of the front page (56) References JP-A-57-89089 (JP, A) JP-A-2000-96971 (JP, A) JP-A-3-2490 (JP, A) U) Japanese Utility Model Hei 6-8488 (JP, U) Registered utility model 3048609 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21B 7/00 E21B 4/14

Claims (2)

(57) [Claims] An excavator in which a down-the-hole hammer drill or an auger drilling rod is coupled to a rotary drive suspended from a crane and the outer periphery of which is surrounded by a casing attached to the rotary drive in a non-rotating state. An engaging ridge or an engaging concave groove is formed in the length direction, and two counterweights are separated by a connecting plate.
Joining secures a penetration between them, and this penetration
Engage the engaging ridges or concave grooves formed on the casing.
As a guide member, a counterweight having an engaging concave portion or an engaging protrusion is suspended and supported by a wire or the like in a state in which the casing penetrates, and the guide member is provided with a sharp projecting leg to penetrate the ground. A drilling rig characterized in that: 2. The projection leg according to claim 1, wherein the projection leg extends and contracts.
Drilling rig as described.