JP2009079433A - Drilling apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drilling apparatus well balanced as a whole and free from drilling displacement, capable of being grounded to a position very close to the boundary between a ceiling layer and a natural ground or the like by avoiding locating a rotary driving device at a protruding position deviating sideways off the axis of a drill head. <P>SOLUTION: The drilling apparatus is provided with the drill head consisting of an output shaft of a motor and a percussion cylinder both connected with each other with a spline mechanism on the same axial line by turnably installing a percussion cylinder with a built-in hammer spool for hammering a shank rod on a mount case, placing the shank rod hammered by the hammer rod ahead of it with its axis being aligned with the hammer spool and connecting the motor with its rear side with its axis being aligned with the percussion cylinder. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a rotary percussion type drilling device, and more particularly to a drilling device including a rotary head and a hitting device having a drill head arranged on the same axis as a shank rod.

A rotary percussion type drilling device that drills by applying a rotational force, a striking force, and a feeding force to a drill head, the drill head includes a rotary drive device, a striking device, and a shank rod to which the drill rod is connected. For example, rotational force is applied by rotating the shank rod with a motor, and striking force is applied by striking the shank rod with a hammering pool of a percussion cylinder, for example, a percussion cylinder. The drill head is fixed to a slide table that is slidable along a leader or a guide cell, and a feed device such as a hydraulic cylinder is connected to the slide table so that the drill head is advanced and retracted. With this advance device, the advance and retreat of the drill head in which the slide table advances and retreats applies a feed force and a pulling force to the drill head.
The rotary head of the rotary percussion type drilling device, such as a hammerhead pool of a percussion cylinder, is arranged with the axis line aligned behind the shank rod. The shank rod is rotated via a transmission mechanism, for example, a gear, provided so as to protrude to the side (lateral direction side) deviated from the axis of the shaft (see, for example, Patent Documents 1 and 2).

Conventionally, there has also been proposed a perforation device in which a percussion type perforation machine is concentrically arranged behind a rotary type perforation machine (see, for example, Patent Document 3). A rotational force and pressure input (feeding force) are applied to this, and a percussion type drilling machine supports an inner tube arranged concentrically with the outer tube, and rotational force, impact force and pressure input (feeding force) ). In this, a rotary drilling machine and a percussion drilling machine are arranged concentrically.
Japanese Patent Laid-Open No. 10-37645 Japanese Patent No. 2613538 Japanese Examined Patent Publication No. 63-11512

  However, when the rotary drive device as described above is provided in a shape that protrudes to the side and deviates from the axis of the drill head main body such as a shank rod, percussion cylinder, or hammas pool, this protruding portion is provided as a tunnel or the like. However, there is a problem that it becomes an obstacle and obstructs straight drilling in the drilling of drilling at the last place such as the boundary between the top and the ground. Further, since this protruding portion exists, the balance is deteriorated due to imbalance in weight. For example, in the drilling of slopes and slopes such as a suspended type as shown in Japanese Utility Model Publication Nos. 7-21679 and 7-301073. However, there is a problem that a balance blur occurs and obstructs straight and stable drilling.

  In addition, the drilling device in which the percussion type drilling machine is concentrically arranged behind the rotational drive device as described above, the drill rod can only be used for drilling the double tube of the outer tube and the inner tube. It cannot be drilled with force, striking force and feed force, uses a double-pipe drill rod, has a rotary drilling machine and a percussion drilling machine, and the main base of the rotary drilling machine And a supplementary base for the percussion type drilling machine, and a mechanism for advancing and retracting each drilling machine, there is a problem that the drilling apparatus is large and heavy. Furthermore, the rotation motor of this rotary drilling machine is also located on the side deviated from the axis, and in addition, the rotary drilling machine and the percussion drilling machine are spaced apart from each other. Because the rotary drilling machine and the percussion drilling machine move forward and backward separately, the balance is poor due to imbalance in weight. There are unsuitable issues. In addition, such a heavy object has a problem that it is not suitable for slope drilling because it is difficult to move.

  The present invention has been proposed to solve such a problem, and its purpose is that the drill head of the drilling device is configured such that the rotary drive device, the striking device and the shank rod are arranged on the same axis. The rotary drive device does not protrude laterally from the drill head axis, and it is possible to drill the ground at the border of the top and ground, and the whole axis is well balanced, so the entire balance is good. The purpose of the present invention is to provide a rotary percussion type drilling device that is capable of stable straight drilling with small blurring and that is optimal for hanging type slope and slope drilling.

In order to solve the above-described problem, in the drilling device of the present invention, a slide table is provided on a guide cell so as to be slidable along the guide cell, and a drill head is fixed to the slide table and a feeding device is connected to the slide table. Being moved forward and backward,
In the drill head, a percussion cylinder with a built-in hammerhead pool for striking the shank rod is rotatably provided on the mount case, and a shank rod to be hammered by the hammerhead pool is aligned with the axis of the hammerhead pool in front of the drill head. The motor is connected behind the percussion cylinder so that its axis is aligned, and the output shaft of the motor and the percussion cylinder are connected by a spline mechanism on the same axis.

With this configuration, the drill head can be moved forward and backward by moving the slide table along the guide cell with a feeding device, and the output of the motor provided behind the percussion cylinder that is rotatably mounted on the mount case Since the shafts are connected by a spline mechanism with the axis line aligned, the percussion cylinder can be driven to rotate by a motor, and the shank rod provided in front of the percussion cylinder can also be rotated. Since the Hammus pool and the axis are provided in front of the cylinder, the Hammus pool can hit the shank rod.
Therefore, by connecting the drill rod to the shank rod, it is possible to apply a rotational force, a striking force, a feeding force and a pulling force.
The drill head of the drilling device is provided with a motor (rotary drive device), a percussion cylinder with a built-in hammerhead pool (striking device) for striking the shank rod, and a shank rod positioned on the same axis. Since the drive device does not exist in a protruding position that is shifted laterally from the drill head axis, it is possible to drill the ground at the border of the top and ground, and the overall balance is also improved. Straight running drilling is also possible, and drilling slope (slope) drilling is stable with small drilling deviation.
The guide cell in the present invention is a concept including a reader, and the output shaft of the motor includes not only the drive shaft of the motor but also the output shaft from that when a reduction mechanism or the like is interposed. Meaning.

According to the punching device of the present invention, the following effects can be obtained.
(1) A drill head of a drilling device is provided with a motor (rotary drive device), a percussion cylinder (striking device) containing a hammer pool for striking the shank rod, and a shank rod positioned on the same axis, and a motor ( Since the rotary drive device does not exist in a protruding position that is shifted to the side of the drill head axis, there are no obstacles (disturbers) in the ground drilling at the edge of the top and ground boundaries. It is possible to drill a ground at the last axis of the ground.

(2) The motor (rotary drive device) does not exist at the protruding position shifted laterally from the drill head axis, and the motor (rotary drive device), the percussion cylinder (hammer device) incorporating the hammerhead pool, and the shank rod Since they are located on the same axis, the overall weight balance is good and straight drilling without drill misalignment is possible.
(3) In particular, even a suspension type slope (slope) perforation can be maintained with a well-balanced overall balance, so that a straight perforation with a small perforation displacement is possible.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The drill head of the drilling device of the present invention is fixed to a slide table slidably provided on a guide cell, and is suspended by a feeding device (for example, a sprocket rotating by a cylinder and a motor) connected to the slide table. The slide table is moved forward and backward by a chain, etc., so that it can move forward and backward, and it is configured to apply feed force and pulling force to the drill head connected to the slide table. Description is omitted, and only an embodiment of the drill head according to the present invention will be described below.

FIG. 1 is a half sectional front view of a drill head showing an embodiment of the present invention.
In the drill head 1 of the drilling device of the present invention, a percussion cylinder (striking device) 4 having a built-in hammerhead pool (piston) 5 that strikes the shank rod 6 is rotatably provided in the mount case 2, and the front thereof A shank rod (hammer sub) 6 that strikes in the hammerhead pool 5 is arranged so that the axis line coincides with the hammermouth pool 5, and a motor (rotary drive device) 7 is connected to the percussion cylinder 4 so that the axis line coincides behind it. The output shaft 8 of the motor 7 and the percussion cylinder 4 are connected by a spline mechanism 9 on the same axis.

The percussion cylinder 4 incorporating the hammer mass pool 5 is a pneumatic cylinder or a hydraulic cylinder, and reciprocates the hammer mass pool (piston) 5 in the pneumatic circuit or the hydraulic circuit to strike a shank rod (also referred to as a hammer sub) 6. A configuration known in the art is employed, and detailed description thereof is omitted.
The percussion cylinder 4 is rotatably provided on the mount case 2, and in this example, the case where the percussion cylinder 4 is rotatably supported by the bearing 16 is shown. A mounting bracket 3 is fixed to the mount case 2, and is fixed to a slide table (not shown) slidable on the guide cell via the mounting bracket 3. As a result, the drill head 1 can advance and retreat along the guide cell as described above.

A motor 7 is connected behind the percussion cylinder 4 on the same axis, and the percussion cylinder 4 and the output shaft 8 of the motor 7 are connected by a spline mechanism 9 on the same axis. Accordingly, the percussion cylinder 4 can be driven to rotate by driving the motor 7, but the relative movement of the percussion cylinder 4 and the motor 7 in the axial direction is allowed within the range of the spline.
Since the output shaft 8 is an output shaft for transmitting the drive of the motor 7 to the percussion cylinder 4, it may be a direct drive shaft from the motor 7, and a conduction mechanism, for example, a speed reduction mechanism is interposed therebetween. An indirect output shaft may be used. In this example, a case where a planetary three-stage speed reducer 10 is interposed between the motor 7 and the output shaft 8 is shown. Therefore, the output shaft 8 is an output shaft from the planetary three-stage speed reducer 10. Examples of the motor 7 include a hydraulic motor, a pneumatic motor, and an electric motor.

  In front of the percussion cylinder 4, a shank rod 6 that strikes with the hammas pool 5 is connected to the percussion cylinder 4. The shank rod 6 is connected to the percussion cylinder 4 at a rod pin 12 between the shank rod 6 inserted through the front inner peripheral surface (the lower inner peripheral surface in the figure) of the percussion cylinder 4. Accordingly, the shank rod 6 is transmitted with rotational force by the rotation of the percussion cylinder 4, and is transmitted with striking the hammerhead pool 5. The connection between the shank rod 6 and the percussion cylinder 4 may be a spline connection.

  A reverse piston 13 is provided on the outer periphery of the shank rod 6 at the lower end of the percussion cylinder 4, and a disc spring 14 is disposed on the outer periphery thereof. The disc spring 14 urges the shank rod 6 rearward in the axial direction through the reverse piston 13, and acts to perform a reverse hit after a normal hit. The disc spring 14 and the reverse piston 13 are closed by a case member 15. Moreover, the code | symbol 11 shows a shank liner in the figure.

Therefore, according to the drill head 1 of this embodiment, it operates as follows.
Since the drill head 1 is fixed to a slide table that advances and retreats along the guide cell by the feeding device (both are not shown), the drill head 1 advances and retracts the slide table along the guide cell by the feeding device. Since the output shaft 8 of the motor 7 provided on the rear side of the percussion cylinder 4 that can be moved forward and backward and can be rotated on the mount case 2 is connected by the spline mechanism 9 with the axis line aligned. The percussion cylinder 4 can be driven to rotate by the drive of a motor 7, whereby the shank rod 6 provided in front of the percussion cylinder 4 can also rotate through the percussion cylinder 4, and the shank rod 6 can be moved forward of the percussion cylinder. Is provided with the same axis as the hammas pool 5. , It is possible to strike the shank rod 6 reciprocates.
Therefore, by connecting the drill rod to the shank rod 6, it is possible to apply a rotational force, a striking force, a feeding force, and a pulling force.

  Note that a swivel (not shown) may be connected to the shank rod 6 and a drill rod may be connected to the swivel. By interposing the swivel in this way, double pipe excavation is possible using the drill rod as a double pipe.

  The drill head 1 is provided with a motor (rotary drive device) 7, a percussion cylinder (blow device) 4 with a built-in hammerhead pool 5 that strikes the shank rod 6, and a shank rod 6 positioned on the same axis. The motor (rotary drive device) 7 does not exist at the protruding position shifted laterally from the drill head axis. Therefore, there is no obstacle hitting the top and ground, even when the ground is drilled at the border between the top and the ground, and the ground can be drilled at the border between the top and the ground. Therefore, straight drilling without drilling deviation is possible, and stable drilling with small drilling deviation can be achieved even with suspended slope and slope drilling.

  The above embodiment is not intended to limit the present invention, and various modifications of the present invention are allowed without departing from the spirit of the present invention.

  The present invention can be applied to a drilling device or drilling device for drilling or drilling by applying a rotational force, striking force and advancing force / pulling force to the drill rod, and the drill rod can be used as a single tube or a double tube. It is. Moreover, it is applicable also to the double pipe excavation (drilling) construction method which drills or excavates, supplying water and air from a drill rod.

It is a half section front view of a drill head showing an embodiment of this invention.

Explanation of symbols

1 Drill Head 2 Mount Case 3 Mounting Bracket 4 Percussion Cylinder 5 Hammer Pool (Piston)
6 Shank rod (hammer sub)
7 Motor (Rotary drive device)
8 Output shaft 9 Spline mechanism 11 Shank liner

Claims (1)

A slide table is provided on the guide cell so as to be slidable along the guide cell. A drill head is fixed to the slide table and a feed device is connected to the slide table to move forward and backward.
In the drill head, a percussion cylinder with a built-in hammerhead pool for striking the shank rod is rotatably provided on the mount case, and a shank rod to be hammered by the hammerhead pool is aligned with the axis of the hammerhead pool in front of the drill head. A perforation apparatus, wherein a motor is connected to a percussion cylinder with an axis aligned behind the motor, and an output shaft of the motor and a percussion cylinder are connected to each other by a spline mechanism on the same axis.

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