JP2013194375A - Drilling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drilling device to which a wire for increasing a load of a tip bit can be assembled easily and in which construction efficiency can be improved.SOLUTION: A drilling device 1 comprises a base machine 10, a leader 20, a driver 30, a drilling shaft 40, and a throttling mechanism 50 which increases a load to a tip end bit 41. In a main body unit 12 of the base machine 10, a support member 16 is erected and the throttling mechanism 50 includes a first guide member 51 provided in the support member 16 at a position lower than the top of the leader 20 and a second guide member 52 provided in the main body unit 12. A wire 14a extending from a winch 14 of the main body unit 12 is guided by the first guide member 51, the wire 14a extending from the first guide member 51 is guided by the second guide member 52, and the wire 14a extending from the second guide member 52 is assembled to the driver 30.

Description

  The present invention relates to a drilling device for drilling a vertical hole in the ground.

  An excavation apparatus for excavating a vertical hole in the ground includes a base machine, a leader supported by the base machine, a drive device that moves up and down along the leader, and an excavation shaft connected to the drive device. In such an excavator, the ground is excavated while applying the weight of the drive device and the excavator shaft to the tip bit, but when the hard formation is excavated, the load on the tip bit is insufficient and the excavation efficiency is greatly reduced. There is a case.

Therefore, some conventional drilling devices have a narrowing mechanism that increases the load on the tip bit when excavating a hard formation. In the squeezing mechanism, the squeezing wire extended from the winch provided in the base machine is hung around the pulley provided in the drive device via the top of the reader and the pulley provided in the base machine, and the squeezing mechanism The end of the wire is fixed to the base machine (see, for example, Patent Document 1).
In this configuration, when the narrowing wire is wound by the winch, a downward force is applied to the driving device by the narrowing wire, so that the load on the tip bit can be increased.

JP 2010-196371 A

  In the excavator having the above-described narrowing mechanism, in a state where the load on the tip bit is not increased, that is, in a state where no tension is applied to the narrowing wire, the narrowing wire is winched in synchronization with the raising and lowering of the driving device. It is difficult to wind or unwind. In spite of the fact that there is little need to increase the load on the tip bit during excavation work, it is necessary to always control the narrowing winch in synchronization with the elevation of the drive device.

  Therefore, it is desirable to remove the squeezing wire from the drilling rig during normal operation and assemble the squeezing wire to the digging rig when it is necessary to increase the load on the tip bit. Since the wire is hung around the top of the reader, there is a problem that the wire handling work becomes complicated.

  An object of the present invention is to solve the above-described problems, and to provide a drilling device that can easily assemble a wire for increasing the load of a tip bit and can improve construction efficiency.

  In order to solve the above-mentioned problems, the present invention is an excavation apparatus having a base machine, a reader supported by the base machine, a driving device that moves up and down along the reader, and a tip bit at the lower end. A drilling shaft whose upper end is connected to the drive device, and a narrowing mechanism for increasing the load on the tip bit, and a support member is erected on the main body of the base machine. The narrowing mechanism includes a first guide member provided on the support member below a top portion of the reader, and a second guide member provided on the main body device. And the wire extended upward from the winch of the main body device is guided downward by the first guide member, and the wire extended from the first guide member is upward by the second guide member. The wire guided and extended from the second guide member is assembled to the drive device.

In this configuration, when the wire assembled in the narrowing mechanism is wound by the winch, a downward force is applied to the driving device by the wire, so that the load on the tip bit can be increased.
In the present invention, since the first guide member is arranged at a position lower than the top of the leader, a wire for increasing the load on the tip bit can be easily arranged at a low position without being hung around the top of the leader. It can be assembled to the narrowing mechanism, and workability can be improved.

  In the excavating apparatus described above, the narrowing mechanism includes a third guide member provided in the driving device and a wire fixing portion provided in the main body device, and is extended from the second guide member. When the wire is guided downward by the third guide member and the wire extended from the third guide member is fixed to the wire fixing portion, the wire is connected to the drive device. The downward force can be applied in a well-balanced manner.

  In the excavating apparatus of the present invention, since the wire for increasing the load on the tip bit can be easily assembled to the narrowing mechanism at a low position, workability can be improved and construction efficiency can be improved.

It is a right view of the state which assembled | attached the wire for narrowing down to the excavation apparatus of this embodiment. It is a left view of the state which assembled | attached the wire for narrowing down to the excavation apparatus of this embodiment. It is the right view which showed the excavation apparatus of this embodiment. It is the figure which showed the drive device of this embodiment, (a) is a front view, (b) is a left view. It is explanatory drawing which showed the handling of the wire for narrowing in the narrowing mechanism of this embodiment.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
As shown in FIG. 3, the excavator 1 excavates a vertical hole in the ground, and includes a base machine 10, a reader 20 supported by the base machine 10, a drive device 30 that moves up and down along the leader 20, An excavation shaft 40 connected to the drive device 30 and a narrowing mechanism 50 that increases the load on the tip bit 41 of the excavation shaft 40 are provided.

  The base machine 10 is a vehicle including a traveling device 11 having a crawler belt and a main body device 12 disposed above the traveling device 11. The main body device 12 is connected to the traveling device 11 so as to be able to turn.

A driver's cab 12 a and a reader support portion 12 b that supports the reader 20 are provided at the front portion of the main body device 12. Further, an elevating winch 13 and a narrowing winch 14 are provided at the rear portion of the main unit 12.
Further, at the rear portion of the main body device 12, two left and right support columns 15 that are inclined with respect to the reader 20 are erected with an upper end portion connected to the upper portion of the reader 20.

A support member 16 is erected on the upper surface of the main body device 12. The support member 16 includes two left and right rear frames 16a erected substantially vertically at the rear portion of the main body device 12, a top frame 16b that is supported by the top portions of both rear frames 16a and extends in the horizontal direction, and a main body. The apparatus 16 includes a left and right front frame 16c which is erected on the front portion of the device 16 and which is inclined rearwardly from the lower end portion toward the upper end portion and is connected to the top frame 16b.
The support member 16 of the present embodiment is a so-called A frame for winding a wire for tilting the boom when the main body device 12 is provided with a tiltable boom.
The top frame 16 b of the support member 16 is disposed at a position lower than the top of the reader 20.

The reader 20 is a column having a rectangular cross section whose lower end is supported by the reader support portion 12b of the main body device 12 and whose upper portion is supported by a column 15 having a circular cross section, and the axial direction is arranged perpendicular to the ground. . The reader 20 is configured by connecting a plurality of readers in the vertical direction.
A leader side pulley group 21 is provided on the top of the leader 20. A guide rail 22 is attached along the left and right corners of the front side surface of the reader 20.

  The drive device 30 is a drive motor having a rotating shaft 31 protruding vertically downward, and is attached to the guide rail 22 of the reader 20 so as to be slidable in the vertical direction. A driving pulley group 32 is provided on the upper surface of the driving device 30.

  The excavation shaft 40 is a columnar member having a tip bit 41 provided at the lower end portion 40 b, and the upper end portion 40 a is connected to the rotation shaft 31 of the drive device 30. Further, a screw 43 is provided on the outer peripheral surface of the excavation shaft 40.

  In the excavator 1, the lifting wire 13 a extended from the lifting winch 13 is hung around the driving pulley group 32 via the leader pulley group 21, and then the end thereof is fixed to the top of the reader 20. ing. Accordingly, the driving device 30 moves up and down along the reader 20 by winding or feeding the lifting wire 13 a by the lifting winch 13.

  In the excavation apparatus 1, a vertical hole can be excavated in the ground by rotating the excavation shaft 40 together with the rotation shaft 31 and lowering the driving device 30 to bring the tip bit 41 into contact with the ground. In addition, the amount of feeding of the lifting wire 13a is adjusted so that the weight of the drive device 30 and the excavation shaft 40 is applied to the tip bit 41 during excavation.

As shown in FIGS. 1 and 2, the narrowing mechanism 50 is configured to increase the load on the tip bit 41 by the narrowing wire 14 a wound around the rotary drum of the narrowing winch 14.
The narrowing mechanism 50 includes a first guide member 51 provided on the support member 16, a second guide member 52 provided on the main body device 12, a third guide member 53 provided on the drive device 30, and the main body device 12. And a wire fixing portion 54 provided on the head.

The first guide member 51 is a pulley that guides the narrowing wire 14a extending upward from the narrowing winch 14 obliquely downward toward the front portion of the main body device 12 (see FIG. 5).
The first guide member 51 is provided on the top frame 16 b of the support member 16 and is disposed at a position lower than the top of the reader 20.

The second guide member 52 is a pulley that guides the narrowing wire 14a extending downward from the first guide member 51 vertically upward along the reader 20 (see FIG. 5).
The second guide member 52 is disposed on the right side of the reader 20 at the front end portion of the main body device 12.

As shown in FIG. 4A, the third guide member 53 is provided on the upper surface of the driving device 30, and the narrowing wire 14a extended upward from the second guide member 52 is connected to the leader 20 (FIG. 2), and is guided vertically downward.
The third guide member 53 includes a right pulley 53a and a left pulley 53b, and the left and right pulleys 53a and 53b are attached to the rear portion of the upper surface of the drive device 30 with a space left and right (FIG. 4B). )reference).
The narrowing wire 14a extended upward from the second guide member 52 is guided horizontally left by the right pulley 53a, and the narrowing wire 14a extended horizontally from the right pulley 53a is Then, it is guided vertically downward by the left pulley 53b (see FIG. 5).

  As shown in FIG. 2, the wire fixing portion 54 is configured by an existing cotter socket disposed on the left side of the reader 20 at the front end portion of the main body device 12. An end of a narrowing wire 14a extending downward from the third guide member 53 is fixed to the wire fixing portion 54 (see FIG. 5).

Next, the excavation method using the excavator 1 described above will be described.
When excavating the ground with the excavator 1, the weight of the driving device 30 and the excavation shaft 40 is normally applied to the tip bit 41 without attaching the narrowing wire 14 a to the narrowing mechanism 50 as shown in FIG. 3. While applying, while rotating the excavation shaft 40 and lowering the drive device 30, a vertical hole can be excavated in the ground by the tip bit 41.

  When excavating a hard formation, after stopping the rotation of the excavation shaft 40, as shown in FIG. 5, the narrowing wire 14a extended from the narrowing winch 14 is connected to the first guide member 51, The wire is fixed to the wire fixing portion 54 via the second guide member 52 and the third guide member 53.

  In this way, when the narrowing wire 14a is assembled to the narrowing mechanism 50 and the narrowing wire 14a is wound up by the narrowing winch 14, a downward force is applied to the driving device 30 by the narrowing wire 14a. This increases the load on the tip bit 41 (see FIG. 1). In this state, as shown in FIG. 1 and FIG. 2, the hard excavation shaft 40 is rotated and the driving device 30 is lowered, whereby the hard formation can be excavated by the tip bit 41.

  Further, when the tip bit 41 passes through the hard formation and an increase in the load on the tip bit 41 becomes unnecessary, after the rotation of the excavating shaft 40 is stopped, the squeezing wire 14a is removed from the squeezing mechanism 50. The excavating shaft 40 is rotated while the weight of the driving device 30 and the excavating shaft 40 is applied to the tip bit 41, and the ground is excavated by the tip bit 41.

In the excavating apparatus 1 as described above, as shown in FIG. 3, the squeezing wire 14a is normally removed from the squeezing mechanism 50 and the squeezing wire 14a is used when the load on the tip bit 41 needs to be increased. It can be assembled to the narrowing mechanism 50.
In addition, the first guide member 51, the second guide member 52, the third guide member 53, and the wire fixing portion 54 of the narrowing mechanism 50 are arranged at a position lower than the top of the reader 20, and the narrowing wire 14a is lowered. Since it can be easily assembled to the narrowing mechanism 50 at a position, workability can be improved and construction efficiency can be improved.

  Further, the wire for narrowing 14 a extending upward from the second guide member 52 of the main body device 12 is passed through the third guide member 53 provided on the upper surface of the driving device 30, and the wire fixing portion 54 of the main body device 12. Therefore, a downward force can be applied to the drive device 30 from the narrowing wire 14a in a well-balanced manner.

The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
In the present embodiment, the support member 16 provided on the upper surface of the main body device 12 is configured by the rear frame 16a, the top frame 16b, and the front frame 16c, but the configuration of the support member is not limited. For example, a single columnar support member may be erected on the upper surface of the main body device 12, and the first guide member 51 may be provided on the support member.

  Further, the narrowing wire 14 a extended from the second guide member 52 is fixed to the wire fixing portion 54 via the third guide member 53 of the driving device 30, but extends from the second guide member 52. The narrowed-down wire 14 a may be fixed to the driving device 30.

  In the present embodiment, the third guide member 53 is provided on the upper surface of the driving device 30, but the third guide member 53 may be provided on the side surface or the lower surface of the driving device 30.

In the present embodiment, the first guide member 51, the second guide member 52, and the third guide member 53 are constituted by pulleys, but the guide member is constituted by a member having a curved surface, and the narrowing wire is formed by the curved surface. You may comprise so that 14a may be guided.
Furthermore, the configuration of the wire fixing portion 54 is not limited, and various fixing methods can be used.

DESCRIPTION OF SYMBOLS 1 Excavation apparatus 10 Base machine 11 Traveling apparatus 12 Main body apparatus 12b Leader support part 13 Elevating winch 13a Elevating wire 14 Narrowing winch 14a Narrowing wire 16 Support member 16b Top frame 20 Reader 22 Guide rail 30 Drive apparatus 31 Rotating shaft 40 Excavation shaft 41 Tip bit 50 Narrowing mechanism 51 First guide member 52 Second guide member 53 Third guide member 53a Right pulley (third guide member)
53b Left pulley (third guide member)
54 Wire fixing part

Claims (2)

A base machine,
A reader supported by the base machine;
A drive device that moves up and down along the reader;
A drilling shaft having a tip bit at the lower end and an upper end connected to the drive device;
A narrowing mechanism for increasing the load on the tip bit,
A support member is erected on the main body of the base machine,
The narrowing mechanism is
A first guide member provided on the support member below the top of the reader;
A second guide member provided in the main body device,
A wire extending upward from the winch of the main body device is guided downward by the first guide member, and the wire extending from the first guide member is guided upward by the second guide member. The excavator is characterized in that the wire extended from the second guide member is assembled to the drive unit. The narrowing mechanism is
A third guide member provided in the drive device;
A wire fixing portion provided in the main body device,
The wire extended from the second guide member is guided downward by the third guide member, and the wire extended from the third guide member is fixed to the wire fixing portion. The excavator according to claim 1.

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