JP2008127848A - Long drilling apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a long drilling apparatus which carries out drilling by an extension type guide cell, wherein the long drilling apparatus can be loaded on a drill jambo without requiring a separate driving source. <P>SOLUTION: The long drilling apparatus is formed of: an outer tube 22 mounted on the tip of a boom 12 of the drill jambo 11; an extension cylinder 21 extendable/contractible upon feeding/discharging of hydraulic oil from the drill jambo 11; an inner tube 23 mounted in the cylinder 21; a guide rail 31 mounted on the tube 23; the guide cell 32 mounted on the guide rail 31 in a manner movable forward and backward along the same; a drifter 33 mounted on the guide cell 32 in a manner movable forward and backward along the same; coaxial double pulleys 42 (45) arranged on the tip of the inner tube 23; a fulcrum pulley 41 arranged on the outer tube 22; and a wire 43 extended between the outer tube 22 and the guide cell 32 and wrap-connected to the double pulleys 42 (45) and the fulcrum pulley 41 to form four-folded connection. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a guide cell stretching type long hole drilling device.

One of the auxiliary methods in mountain tunnels is a long tip receiving method (for example, long fore-piling work or long mirror bolt work) that requires a long drilling hole of about 12.5m. In the AGF method, which is one of the typical methods, construction is carried out in the situation shown in FIG. In FIG. 6, reference numeral 10 denotes a face having mirror spray concrete of about 10 cm thickness.
As a work procedure, a guide cell 64 having a standard length of 5.3 m provided at the tip of a boom 62 of a drill jumbo 61, which is a heavy construction machine installed in the vicinity of the face 10, is usually measured by a rock drill 65 shown in FIG. Of the steel pipes 1, 2, 3, and 4 with four double pipes, only the top pipe 1 and the inner rod are set, and the first drilling and placing work is performed.
After the placement, as shown in FIG. 7, the intermediate tube 2 having a length of about 3.0 m and a weight of about 50 kg is placed on the basket 66 of the drill jumbo 1 while the position of the guide cell 64 is fixed at a high place near the face 10. A rod with a weight of about 20 kg is placed and moved upward, and after drilling the steel pipe 2 and the rod with a worker's hand, drilling and placing work is carried out. After that, after repeating the chiseling and drilling / placing work of the remaining two steel pipes 3 and 4, the bit and rod were collected when the pouring work was completed, and then the steel pipes 1, 2, 3, 4 Injecting from the inside to the ground.
Therefore, in FIG. 6, a general one-running length is 12.5 m, a lap length is 3.5 m, and a shift length is 9 m.

As an invention that enables drilling of a predetermined length at a stretch without adding rods even for a long drilling rod, it is not a drill jumbo that is a drilling machine, but a length that is attached to the boom tip of a backhoe or truck crane. There is a shaving device (see Patent Document 1).
The long hole drilling device of Patent Document 1 is engaged with a first guide cell provided for a gantry of a main body and a chain provided along the longitudinal direction of the first guide cell. A second feed cell that is provided separately from the second guide cell that can be moved forward and backward by a feed motor and the first feed motor that meshes with a chain that is provided along the longitudinal direction of the second guide cell. A drilling machine main body that moves forward and backward by a motor, and the second guide cell is configured to extend rearward from the rear end of the first guide cell by the first feed motor when the second guide cell is moved backward. The drilling machine main body can be retracted by the second feed motor independently of the guide cell retracting operation.
Japanese Patent No. 2922142

However, with the AGF method described above, the steel pipe and rod chiseling work with a double pipe, which is a heavy object at a high place near the face, is performed three times before one drilling with a long drilling hole of about 12.5 m is performed. Since it is indispensable, 1) a lot of time and labor is required for drilling and placing, resulting in poor work efficiency and high cost. 2) A basket that is lifted near the face and in the sky during flea splicing work. There is a problem that a heavy work such as a steel pipe and an inner rod is manually lifted and set on a guide cell in a narrow work space at a high position inside.
As a means to solve this, in addition to drill jumbo used for drilling and placing rock bolts or drilling holes for blasting holes, which are indispensable as support for mountain tunnels when carrying out auxiliary construction methods, dedicated heavy machinery for carrying out auxiliary construction methods (For example, a heavy machine for the Trevi tube method) needs to be prepared separately, but there is a disadvantage that the cost is increased.

  In addition, the long hole drilling device of Patent Document 1 is attached to the tip of a boom of a backhoe or truck crane different from the drill jumbo, and the guide cell is constituted by an extension mechanism by a two-stage motor-driven chain mechanism. is there. Therefore, it is necessary to equip two motors for driving the guide cell to extend, which increases the cost.

  An object of the present invention is to make it possible to equip a drill jumbo with a long drilling device using an extending type guide cell without requiring a separate drive source.

  In order to solve the above problems, the invention according to claim 1 is an assembly of an outer tube, an extension cylinder assembled to the outer tube, an inner tube assembled to the extension cylinder, and the inner tube. Guide rails, guide cells assembled so as to be able to move forward and backward along the guide rails, drifters assembled so as to be able to move forward and backward along the guide cells, and coaxials respectively provided on the left and right side surfaces of the inner tube. An upper double pulley, a fulcrum pulley by a coaxial double pulley provided on each of the left and right side surfaces of the outer tube, a bridge between the outer tube and the guide cell on each of the left and right sides, and the inner tube Double pulley and support Wherein the elongate drilling device and a wire that is four meshing with the pulley.

  The invention according to claim 2 is the long hole drilling device according to claim 1, wherein the front pulley by the double pulley provided on the left and right side surfaces of the front end of the inner tube, and the rear of the inner tube, respectively. A rear pulley by the double pulley provided on each of the left and right sides of the end; a front wire hung on the front pulley and a fulcrum pulley on each of the left and right sides; and a rear pulley and a fulcrum pulley on each of the left and right sides. And four rear wires.

  A third aspect of the present invention is the long hole drilling device according to the first or second aspect, wherein the outer tube incorporating the extension cylinder and the inner tube is assembled to a boom tip of the drill jumbo. The extension cylinder expands and contracts by supplying and discharging hydraulic oil from the drill jumbo.

According to the present invention, four wires are hung on the front pulley and fulcrum pulley by the double pulley, or on the rear pulley and fulcrum pulley by the double pulley, so that the movement amount of the guide cell is quadrupled with respect to the stroke of the extension cylinder. Can be.
Moreover, since the extension cylinder can be expanded and contracted by supplying and discharging the hydraulic oil from the drill jumbo, a separate drive source is not required, and the cost can be reduced.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 shows the configuration of an embodiment of a long hole drilling device to which the present invention is applied. As described above, 1, 2, 3, 4 are steel pipes (double pipes), 10 is a face, Is a drill jumbo, 21 is an extension cylinder, 22 is an outer tube, 23 is an inner tube, 31 is a guide rail, 32 is a guide cell, 33 is a drifter, 41 is a fulcrum pulley, 42 is a front pulley, and 45 is a rear pulley.

  In this embodiment, in order to improve work efficiency, reduce costs, and improve safety, the long steel pipes 1, 2, 3, and 4 of about 12.5 m are used at high places by using a drill jumbo 11 that is a general-purpose machine. Constructs a long drilling device with a length of about 6m when retracted that incorporates an extension mechanism that enables drilling and placement without chiseling.

  The drill jumbo 11 is provided with a long hole drilling device at the tip of the boom 12. As shown in the figure, this long hole drilling device includes an extension cylinder 21, an outer tube 22, an inner tube 23, a guide rail 31, a guide cell 32, a drifter 33, a fulcrum pulley 41, a front pulley 42, a front wire 43, and a rear pulley 45. And a rear wire (not shown).

The outer tube 22 is mounted on the drill jumbo 11, and the extension cylinder 21 incorporated in the outer tube 22 expands and contracts by supplying and discharging hydraulic oil from a hydraulic source (not shown) for swinging the boom 12 by hydraulic pressure. It operates, and hydraulic piping (not shown) is connected from a hydraulic source.
The inner tube 23 extends and contracts forward in connection with the extension cylinder 21, and a bracket 25 extending forward is assembled to the inner tube 23 so as to extend and contract. A rod guide 26 is provided at the tip of the bracket 25.

And the guide rail 31 is assembled | attached on the inner tube 23 so that the outer tube 22 may not be contacted. Further, a guide cell 32 is assembled on the guide rail 31 so as to be movable forward and backward along the guide rail 31.
A drifter 33 is assembled on the guide cell 32 so as to be movable forward and backward along the guide cell 32. The drifter 33 includes a drilling rod 34 that extends forward, and a bit 35 at the tip thereof. As is known, the drifter 33 is moved forward and backward by air pressure, hydraulic pressure or electric power through a pipe from a driving source mounted on the drill jumbo 11 and generates rotation and striking force of the drilling rod 34.

Further, fulcrum pulleys 41 are provided on the left and right side surfaces of the outer tube 22, respectively. Specifically, a fulcrum pulley 41 is attached to the front side portion of the side surface of the outer tube 22. This fulcrum pulley 41 is a coaxial double pulley.
A front pulley 42 is provided on each of the left and right side surfaces of the inner tube 23. Specifically, a front pulley 42 is attached to the front end portion of the side surface of the inner tube 23. The front pulley 42 is a coaxial double pulley.

  As shown in FIG. 3, a front wire 43 is stretched over the fulcrum pulley 41 and the front pulley 42 described above. That is, the front wire 43 is constructed between the front end portion of the outer tube 22 and the rear end portion of the guide cell 32, and as shown in FIG. 4, for example, the inner pulley of the fulcrum pulley 41 that is a double pulley. And four pulleys on the left and right sides of the front pulley 42.

Similarly, rear pulleys 45 are provided on the left and right side surfaces of the inner tube 23, respectively. Specifically, a rear pulley 45 is attached to the rear end portion of the side surface of the inner tube 23. The rear pulley 45 is a coaxial double pulley.
A rear wire (not shown) is bridged between the rear pulley 45 and the fulcrum pulley 41 described above. That is, the rear wire, like the front wire 43, is installed between the outer tube 22 and the front end portion of the guide cell 32. For example, an outer pulley of the fulcrum pulley 41 that is a double pulley and a rear pulley 45 that is a double pulley. There are four on each side.

FIG. 2 shows a work flow in the AGF method according to the present invention.
First, as shown in FIG. 2A, a long hole drilling device is incorporated into the tip of the boom 12 of the drill jumbo 11. That is, the outer tube 22 is attached and fixed to the tip of the boom 12 of the drill jumbo 11.
Then, as shown in FIG. 2 (b), the long drilling device is extended by holding the guide cell 32 in the retracted position, and the steel pipes 1, 2, 3, and 4 are preliminarily assembled. At this time, the drilling rod 34 penetrates through the steel pipes 1, 2, 3, 4, and the leading pipe 1 is supported by the rod guide 26.
Thereafter, by drilling the boom 12 of the drill jumbo 11, continuous drilling of the face 10 is started as shown in FIG.

  3 is an enlarged view of the long hole drilling device of FIG. 1, FIG. 3 (a) shows a state in which the guide cell 32 is in the retracted position, and FIG. 3 (b) shows that the guide cell 32 moves forward. The state in the position is shown.

4 shows the operation of the fulcrum pulley 41, the front pulley 42, and the front wire 43 of FIG. 3. FIG. 4 (a) shows a state in which the guide cell 32 is in the retracted position, and FIG. A state in which the guide cell 32 is in the forward movement position is shown.
That is, the supply of hydraulic oil to the extension cylinder 21 causes the front pulley 42 to move forward as shown in FIGS. 4A to 4B as the inner tube 23 moves forward.

Here, since the front pulley 42 is a double pulley, the guide cell 32 moves forward with respect to the outer tube 22 via the guide rail 31 by the front wire 43 hung by four including the fulcrum pulley 41. The advance distance of the guide cell 32 is four times the advance distance of the inner tube 23. Therefore, when the inner tube 23 moves forward by 2 m, the guide cell 32 moves forward by 8 m.
Then, when the drifter 33 moves forward on the guide cell 32 by 5 m, a drilling hole having a maximum length of 13 m is possible.

  The guide cell 32 is retracted on the same principle as the forward movement by four rear wires (not shown) hung on the fulcrum pulley 41 and the rear pulley 45 formed of a double pulley.

By using the above long hole drilling apparatus, as shown in FIG. 2, the steel pipes 1, 2, 3, 4 and the inner rod are pre-assembled on the guide cell 32 previously extended to 12.5 m or more. It becomes possible.
Therefore, 1) Reduction of cycle time by shortening drilling and placing time, 2) The use of single long steel pipes 1, 2, 3 and 4 makes it possible to use consumable parts such as steel pipe joint thread costs. 3) Reduction of work close to the working face and improvement of safety due to the elimination of work at high places are expected.

Further, as shown in FIG. 5, the long boring device is shortened to about 6 m in length of the guide cell 32, whereby the posture of the boom 12 of the drill jumbo 11 is controlled not only in the horizontal direction but also in the vertical direction. Can be placed.
That is, since the long hole drilling device is accommodated in the cross section of the tunnel, the characteristics of the drill jumbo 11 as a general-purpose machine can be utilized. Furthermore, no problem arises during transportation using a dump truck (not shown) when the long hole drilling device is installed and removed from the drill jumbo 11.

  In addition, the long hole drilling device is made as light as possible, can be attached to and detached from the tip of the boom 12 of a general drill jumbo 11, and is driven by a hydraulic type supplied from the drill jumbo 11. There is nothing special to prepare in order to activate the hole device.

1 shows the configuration of an embodiment of a long hole drilling device to which the present invention is applied, an overall side view (a) showing a drilling start state mounted on a drill jumbo, and a hole finishing end state of the long hole drilling device. It is the partial side view (b) which showed. The work flow in the AGF construction method by this invention is shown, The schematic side view (a) which shows the integration of the long hole drilling device with respect to the boom tip of the drill jumbo of FIG. It is the schematic side view (b) which showed the state to carry out, and the schematic side view (c) which showed the start state of the continuous drilling with respect to a face. FIG. 2 is an enlarged view of the long hole drilling device of FIG. 1, and a side view (a) showing a state in which the guide cell is in a retracted position and a side view (b) showing a state in which the guide cell is in an advanced position. It is. FIG. 4A and FIG. 4B illustrate the operation of the pulley and the wire in FIG. 3, and are an explanatory diagram (a) showing a state where the guide cell is in the retracted position and an explanatory diagram (b) showing a state where the guide cell is in the advanced position. It is the whole side view showing the vertical lock bolt placing state (guide cell shortened state) by the drill jumbo to which the present invention is applied. It is the figure which showed notion by the conventional AGF construction method notionally. It is the figure which showed the chisel joint situation of the conventional AGF construction method.

Explanation of symbols

1, 2, 3, 4 Steel pipe (double pipe)
10 Face 11 Drill jumbo 12 Boom 21 Extension cylinder 22 Outer tube 23 Inner tube 25 Bracket 26 Rod guide 31 Guide rail 32 Guide cell 33 Drifter 34 Drilling rod 35 Bit 41 Support pulley (double pulley)
42 Front pulley (double pulley)
43 Front wire 45 Rear pulley (double pulley)

Claims (3)

An outer tube,
An extension cylinder assembled to the outer tube,
An inner tube assembled to this extension cylinder;
A guide rail assembled to the inner tube,
A guide cell assembled so as to be able to move forward and backward along the guide rail;
A drifter assembled to move forward and backward along this guide cell,
A coaxial double pulley provided on each of the left and right side surfaces of the inner tube;
A fulcrum pulley by a coaxial double pulley provided on each of the left and right sides of the outer tube;
A long cutting machine comprising: a double pulley provided on the inner tube and a wire that is hung on four fulcrum pulleys on the left and right sides between the outer tube and the guide cell. Hole device. A front pulley by the double pulley provided on each of the left and right sides of the front end of the inner tube;
A rear pulley by the double pulley provided on each of the left and right sides of the rear end of the inner tube;
Four front wires hung on the front pulley and the fulcrum pulley on each of the left and right sides;
The long hole drilling device according to claim 1, further comprising four rear wires hung on the rear pulley and the fulcrum pulley on each of the left and right side surfaces. The outer tube incorporating the extension cylinder and the inner tube is assembled to the boom tip of the drill jumbo,
The long hole drilling device according to claim 1 or 2, wherein the extension cylinder expands and contracts by supplying and discharging hydraulic oil from the drill jumbo.

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