JP2009097313A - Drilling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the initial cost and running cost of a drilling device, and facilitate operation switching to operation other than drilling to enhance the versatility of the entire device. <P>SOLUTION: A drilling device includes an auger guide 1 suspended from and supported to the tip end of a telescopic boom 52, an earth auger 2 hooked and fixed to a hanging hook 57 suspended from the tip end of the telescopic boom 52, and a drilling mechanism 3 attached to the lower end side of the earth auger 2. An engaging material 22 provided in the earth auger 2 is fitted to a guide part 14 provided in the auger guide 1, thereby regulating the relative rotation of the earth auger 2 with respect to the auger guide 1. Such a constitution enables drilling operation using the turning force of the earth auger 2 without needing a leader conventionally installed, which promotes the simplification and compactification of the drilling device to reduce the initial cost and running cost of the drilling device. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drilling device used for drilling work such as pile embedding holes.

  Various structures have been proposed as a drilling device for drilling a pile-embedded hole, but structurally intended for drilling work on relatively soft ground (for example, patents) Reference 1) and those for drilling a hard ground such as rock (see Patent Documents 2 and 3).

  In the former, an auger screw is connected to the lower end side of the earth auger, the auger screw is rotated by the rotational force of the earth auger, and a hole is drilled by a drilling head attached to the tip of the auger screw.

  In the latter, an auger screw and a down-the-hole hammer are sequentially connected to the lower end side of the earth auger, and a hole is drilled by a hammer bit attached to the tip of the down-the-hole hammer by the cooperation of the rotating force of the earth auger and the striking force of the down-the-hole hammer. To do.

  JP 9-41377 A   JP 2001-3363 A   Japanese Utility Model Publication No. 6-63694.

  By the way, since the earth auger generates a rotational force and transmits it to an auger screw or the like, in the structure in which the earth auger is simply supported by suspension, the entire earth auger is swung around by its own rotational force. Therefore, it is difficult to achieve the intended purpose. Therefore, as shown in each of the above-mentioned patent documents, in the conventional drilling device, a long cylinder is supported by a support cylinder provided on the base carriage. A leader is installed upright, and the earth auger is slidably attached to the leader in a vertical direction, so that a hole drilling operation is performed while regulating the swing of the earth auger.

  However, in the drilling device using such a leader, since the device is enlarged, the initial cost is high, and it takes time to install and remove it. There is. In addition, since the apparatus itself is dedicated by providing the reader, for example, it is difficult to remove the reader during work and use the base carriage for other work, which is not preferable in terms of economy.

  Therefore, the present invention suppresses the initial cost and running cost by efficiently performing the drilling work with a compact and simple configuration, and improves the general versatility of the entire apparatus by making it easy to switch to a work other than the drilling work. The present invention has been made for the purpose of providing a drilling device obtained.

  In the present invention, the following configuration is adopted as a specific means for solving such a problem.

  In the drilling device according to the first invention of the present application, the support provided at the distal end portion of the telescopic boom 52 attached to the crane device 50 so as to be movable up and down in a direction perpendicular to the hoisting surface of the telescopic boom 52. The auger guide 1 provided with a guide portion 14 that is supported by a pin 55 so as to be swingable and extends in a substantially vertical direction in the suspended state, and is suspended so as to be able to be wound and unwound from the distal end of the telescopic boom 52. The engaging member 22 hooked on the lowered hanging hook 57 and provided on the side surface thereof is fitted into the guide portion 14 of the auger guide 1 so that relative rotation with respect to the auger guide 1 is restricted. Both an earth auger 2 that is relatively movable along the guide portion 14 and a drilling mechanism 3 that is attached to the lower end side of the earth auger 2 and that receives a rotational force from the earth auger 2 to drill holes. Prepared It is characterized by a door.

  In the drilling device according to the second invention of the present application, in the drilling device according to the first invention, the sheave assembly 54 in which the support pin 55 of the auger guide 1 is disposed at the distal end portion of the telescopic boom 52. It is characterized by being shared by the sheave pin 55 that supports

  In the drilling device according to the third invention of the present application, in the drilling device according to the first or second invention, the engagement member 22 of the earth auger 2 is moved from the lower end side of the auger guide 1 to the guide. It is characterized in that it is configured to be able to fit and detach from the portion 14.

  In the present invention, the following effects can be obtained.

  (A) According to the hole drilling device according to the first invention of the present application, since the auger guide 1 is non-rotatably connected to the distal end portion of the telescopic boom 52, the engagement of the earth auger 2 is achieved. In a range where the material 22 engages with the guide portion 14 of the auger guide 1, the engagement of both of them restricts the earth auger 2 from rotating in the rotation direction with respect to the auger guide 1. . Therefore, drilling work using the rotational force of the earth auger 2 can be performed without providing a conventional leader. As a result, simplification and compactness of the apparatus are promoted, and as a result, the drilling apparatus The initial cost and running cost can be reduced.

  The auger guide 1 is suspended and supported at the tip of the telescopic boom 52 of the crane device 50, while the earth auger 2 is slidable in the vertical direction with respect to the auger guide 1 and the crane device 50. For example, by removing the earth auger 2 from the suspension hook 57 while leaving the auger guide 1 on the telescopic boom 52 side, the crane device is configured to be hooked on the suspension hook 57 on the side. 50 can be easily changed to other work such as normal suspension work using the suspension hook 57, and conversely, the crane device 50 is used for other work other than drilling work. When the ground auger 2 and the like are assembled to the auger guide 1 and hooked on the suspension hook 57, the work can be easily changed to drilling. These results, versatility of the crane apparatus 50, and by extension to improve versatility of the entire said drilling apparatus including the crane device 50, it is possible to further reduce the initial cost and running cost.

  Further, when the earth auger 2 is detached from the suspension hook 57, only the auger guide 1 is left suspended on the telescopic boom 52 side. However, the presence of the auger guide 1 causes the crane device 50 to move. Since it is not obstructed, when the crane device 50 moves within the work site (that is, when the work position is changed), the crane device 50 may move while leaving the auger guide 1 on the telescopic boom 52 side. For example, as compared with the case where it is necessary to remove the leader itself at the time of movement, such as a conventional drilling device equipped with a leader, the moving work can be performed safely and easily and quickly. Improvement in workability can be expected.

  The earth auger 2 is moved up and down integrally with the suspension hook 57 on the telescopic boom 52 side, and the relative position with the auger guide 1 is changed. The relative position of the auger guide 1 is adjusted by correlating the undulation and expansion movements of the telescopic boom 52 and the hoisting or lowering movement of the hoisting hook 57 in addition to the lifting / lowering operation of the hoisting hook 57. Can also be changed. Therefore, by appropriately performing these operations, it is possible to drill holes to a depth exceeding the allowable movement range (that is, the guide range by the guide portion 14) of the earth auger 2 on the auger guide 1 side. As a result, it is not necessary to use a long leader as in the prior art, and the simplification of the structure of the drilling device is promoted accordingly, and further the initial cost and running cost can be reduced.

  (B) According to the drilling device according to the second invention of the present application, in addition to the effect described in the above (a), the following specific effect can be obtained. That is, according to the present invention, in the drilling device according to the first aspect of the invention, the support pin 55 of the auger guide 1 is shared by the sheave pin 55 that supports the sheave assembly 54 disposed at the distal end portion of the telescopic boom 52. Therefore, the sharing of members is promoted, and further reduction of the initial cost of the apparatus can be expected.

  (C) In the drilling device according to the third invention of the present application, in addition to the effect described in the above (a) or (b), the following specific effect is obtained. In other words, in the present invention, the engaging member 22 of the earth auger 2 is configured to be able to be fitted and detached from the guide portion 14 from the lower end side of the auger guide 1. The earth auger 2 can be easily attached to and detached from the auger guide 1 while being attached to the telescopic boom 52 side, and high workability is ensured when the work is changed.

  Hereinafter, the present invention will be specifically described based on preferred embodiments.

A: First Embodiment FIGS. 1 and 2 show a hole drilling device Z according to a first embodiment of the present invention. This drilling device Z uses the crane device 50 as a base cart, and the auger guide 1 described below is provided on the boom head 53 side of the distal end portion of the telescopic boom 52 attached to the vehicle 51 so as to be movable up and down. The earth auger 2 and the hole drilling mechanism 3 are attached.

a: Configuration on the Telescopic Boom 52 Side As shown in FIG. 3, a sheave sheave assembly 54 composed of a plurality of sheaves is perpendicular to the undulating surface of the telescopic boom 52 at the boom head 53 portion of the telescopic boom 52. A sheave block 56 having a suspension hook 57 is attached to a main winding wire rope 58 that is attached by a sheave pin 55 attached in the direction and pulled downward through the sheave assembly 54. The sheave pin 55 is used as a support shaft of the auger guide 1 as described below, and both end portions of the sheave pin 55 extend outward from the side surface of the boom head 53. The extending portion functions as a support portion for the auger guide 1.

  Further, a sheave 61 is disposed on the boom head 53 so as to extend forward. The sheave 61 is wrapped around the auxiliary winding wire rope 60, and a suspension hook 59 is attached to the tip thereof.

b: Configuration of the auger guide 1 The auger guide 1 is formed by bending a plate material into a cross-section "U" shape as shown in FIGS. 3 and 4, and a back plate located at the center of the bending direction. Guide portions 14 extending in the longitudinal direction of the side plates 11 are provided on the inner surface sides of the left and right side plates 11, 11 that are located on both ends in the width direction of the 12 and face each other substantially in parallel. The guide portion 14 is composed of guide plates 15 and 15 having a predetermined length and facing each other in parallel with a predetermined interval, and the inner interval between the guide plates 15 and 15 (that is, the guide groove of the guide portion 14). The width) is set to a dimension in which the engaging member 22 provided in the earth auger 2 described below can be slidably fitted.

  Further, pin receiving holes 16 and 16 into which the sheave pins 55 on the boom head 53 side are fitted are coaxially positioned at the upper ends of the side plates 11 and 11 in the opposing direction of the side plates 11 and 11. Thus, each is provided.

  Accordingly, the auger guide 1 has the boom head 53 fitted inside the side plates 11 and 11 and the sheave pin 55 is inserted into the pin receiving holes 16 and 16 so that the sheave pin 55 is inserted through the sheave pin 55. The boom head 53 is connected to the sheave pin 55 and can swing around the sheave pin 55 (that is, in a plane parallel to the undulating surface of the telescopic boom 52), while swinging in a direction perpendicular to the undulating surface. Both movement and rotation around the vertical line are restricted.

  When the auger guide 1 is connected to the boom head 53 and suspended by its own weight, the sheave block 56 and the suspension hook 57 on the telescopic boom 52 side can freely move up and down inside the auger guide 1. It is like that.

  In this embodiment, as described above, the auger guide 1 is formed so as to have a substantially “U” -shaped cross section and the front side is opened. However, the present invention is not limited to this structure. For example, as shown by a chain line in FIGS. 3 and 4, the front plate 13 may be provided on the front side so as to have a rectangular cross section.

c: Configuration of the earth auger 2 The earth auger 2 has a well-known structure, and applies a rotational force to the hole drilling mechanism 3 described below connected to the lower end side thereof. In this embodiment, the engaging members 22, 22 extending in the vertical direction are respectively attached to the left and right side surfaces of the main body 21 of the earth auger 2, and a suspension ring 25 is provided on the upper surface thereof.

  Then, the earth auger 2 is suspended by the main winding wire rope 58 by hooking the hanging hook 57 of the sheave block 56 that is lowered by the lowering of the main winding wire rope 58 to the hanging ring 25. The main wire rope 58 is moved up by the winding and is moved down by the lowering.

  Further, when the earth auger 2 is wound up by the main wire rope 58, the earth auger 2 enters the auger guide 1. Engaging members 22 and 22 are fitted into the respective guide portions 14 provided on the auger guide 1 side, and the vertical movement is guided by the guide portions 14.

  In this case, within the range in which the engaging member 22 of the earth auger 2 is fitted in the guide portion 14 on the auger guide 1 side, the guide portion 14 and the engaging member 22 rotate in the direction around the vertical line. By engaging at, relative displacement in the rotational direction is regulated. At the same time, the shake due to the relative displacement of the earth auger 2 in the front-rear direction and the left-right direction of the auger guide 1 is restricted. Therefore, in the state in which the rotation regulation and the swing regulation are made, the earth auger 2 operates to generate a rotational force, and even when this is transmitted to the drilling mechanism 3 described later, the entire earth auger 2 is accompanied. Rotation and swinging are restricted, and the rotational force is reliably transmitted from the earth auger 2 to the drilling mechanism 3 side, thereby improving the rotational force transmission efficiency and ensuring operational reliability. The

d: Control of the earth auger 2 and the like Here, when the hole drilling operation is performed by operating the earth auger 2, it is necessary that the engaging member 22 and the guide portion 14 are always engaged. This is as described above. Various methods are conceivable as methods for satisfying such operational requirements. In this embodiment, for example, limit switches are provided at two upper and lower positions on the auger guide 1 side, and the limit switches are turned on. In this case, a configuration is adopted in which the winding or lowering operation of the main winding wire rope 58 is restricted. The operation restriction of the main wire rope 58 by the limit switch is configured such that, for example, when the earth auger 2 is attached to and detached from the auger guide 1 as described later, this can be released. Needless to say.

  When the range of relative movement of the earth auger 2 in the vertical direction with respect to the auger guide 1 is limited in this way, for example, drilling starts when the earth auger 2 is at the upper limit position of the auger guide 1. When the earth auger 2 descends as the drilling proceeds, the operation of the main winding winch (not shown) is controlled so that the main winding wire rope 58 is lowered following the lowering operation.

  However, when the drilling operation proceeds and the earth auger 2 reaches the lower limit position of the auger guide 1, the earth auger 2 cannot be lowered further. That is, the drilling depth is limited to the moving range of the earth auger 2. Therefore, in such a case, while the main winding wire rope 58 is wound, the auger guide 1 is lowered by executing the contracting operation and the falling operation of the telescopic boom 52 in association with each other, and the earth auger 2 is Control is performed so as to move to the upper limit position side of the auger guide 1.

  Thus, the auger guide 1 is lowered by the lowering operation of the earth auger 2 with the position of the auger guide 1 fixed and the operation of the telescopic boom 52 side while holding the position of the earth auger 2. By alternately and repeatedly executing the operation to be performed, it is possible to drill holes to a depth exceeding the moving range of the earth auger 2.

e: Configuration of the drilling mechanism 3 The drilling mechanism 3 is configured by coaxially connecting a down-the-hole hammer 31 having a known structure having a hammer bit 32 at the lower end thereof and a connecting rod 33 having a predetermined length. By connecting and fixing the upper end side of the rod 33 to the lower end side of the earth auger 2, the rotational force from the earth auger 2 side and the striking force from the down the hole hammer 31 side are transmitted to the hammer bit 32, and the hammer Drilling action by the bit 32 is obtained.

f: Description of Drilling Operation Here, the drilling operation using the above-described drilling device Z will be specifically described according to the operation procedure with reference to FIGS. 1 and 4 and FIGS.

  FIG. 1 shows a state before the drilling operation is started by the drilling mechanism 3. In the state before this operation, the hammer bit 32 of the hole drilling mechanism 3 is placed on the hole drilling point with the earth auger 2 raised to near the upper limit position.

  From the state before this work, the earth auger 2 is actuated and the rotational force generated in the earth auger 2 is transmitted to the hammer bit 32 of the hole drilling mechanism 3, and the down-the-hole hammer 31 is actuated and its impact force. Is transmitted to the hammer bit 32, and drilling is performed by the cooperation of both (see FIG. 2).

  In this case, the earth auger 2 is lowered while lowering the main wire rope 58 as the drilling progresses, and the lowering speed of the earth auger 2 is adjusted to the progress of the drilling operation. However, when the earth auger 2 descends from the upper limit position side to the lower limit position and reaches the lower limit position, the operation restriction to the lowering side is performed by the limit switch, and the drilling operation can be continued further. It becomes difficult.

  Therefore, when the earth auger 2 reaches the lower limit position, while continuing the drilling operation by the hammer bit 32, the telescopic boom 52 is laid down at a predetermined speed, and the main wire rope 58 is wound up at an appropriate speed. The auger guide 1 is lowered while maintaining the position on the plane, and is moved relative to the earth auger 2 to near the upper limit position of the auger guide 1. Thereafter, the operation is continued while lowering the main winding wire rope 58 again in accordance with the speed of the earth auger 2 that descends as the drilling operation proceeds.

  Such a drilling operation by only the lowering operation of the main winding wire rope 58 and a drilling operation by the cooperation of the contraction and overturning operations of the telescopic boom 52 and the winding operation of the main winding wire rope 58 are alternately repeated. Thus, the hole can be drilled to a depth exceeding the moving range of the earth auger 2 in the auger guide 1.

  During the hole drilling operation, the auger guide 1 always controls the swing and rotation of the earth auger 2, so that the auger guide is simply used without using a conventional long reader. With a simple and inexpensive configuration including 1, a drilling hole having a required depth can be obtained.

  Although the drilling depth is limited by the length of the drilling mechanism 3, several connecting rods having different lengths are prepared, and the above-described drilling depth is adjusted according to the required drilling depth. By selecting the connecting rod 33, drilling at an arbitrary depth is possible.

  On the other hand, for example, during the drilling operation or after completion of the drilling operation, there is a case where the hanging operation is performed using the crane device 50, that is, the work needs to be changed.

  In this case, as shown in FIG. 5, the main winding wire rope 58 is lowered while raising the telescopic boom 52, and the earth auger 2 is separated downward from the auger guide 1 (in this case, The limit switch on the auger guide 1 side is released). Then, after depositing the hole drilling mechanism 3 and the earth auger 2 on the ground side in a lying state, the suspension hook 57 of the sheave block 56 may be removed from the earth auger 2.

  In the state where the earth auger 2 and the hole drilling mechanism 3 are removed, the auger guide 1 remains attached to the boom head 53 side of the telescopic boom 52 as shown in FIG. Only passes through the inside of the auger guide 1, so there is no problem in the main crane operation using the sheave block 56. The same applies to the supplementary crane operation using the supplementary wire rope 60.

  Further, when the earth auger 2 is removed from the suspension hook 57 and only the auger guide 1 is left suspended on the telescopic boom 52 side, the crane device 50 is present due to the presence of the auger guide 1. Therefore, for example, when the crane apparatus 50 is moved in the work site, the auger guide 1 can be moved while leaving the telescopic boom 52 side. Therefore, for example, as compared with the case where it is necessary to remove the leader itself at the time of movement, such as a conventional drilling device equipped with a leader, the moving work can be performed safely and easily and quickly. Improvement in workability can be expected.

  Conversely, when the work is changed from the crane work state shown in FIG. 6 to the drilling work using the earth auger 2 and the drilling mechanism 3, the main wire rope 58 is unwound and the sheave block 56 is moved down. The suspension hook 57 is hooked on the suspension ring 25 of the earth auger 2 placed on the ground side in a state of being laid down on the ground side, and this is lifted together with the hole drilling mechanism 3. When the ground auger 2 and the hole drilling mechanism 3 are grounded, they are suspended by the main wire rope 58 in a suspended state.

  When the main winding wire rope 58 is further wound up from this state, the earth auger 2 gradually approaches the auger guide 1 from its lower end side. Therefore, at the time of this approach, the position of the earth auger 2 in the rotational direction is adjusted so that the engaging member 22 of the earth auger 2 is fitted to the guide portion 14 on the auger guide 1 side. By winding up the winding wire rope 58, the engaging member 22 of the earth auger 2 is smoothly engaged and fitted into the guide portion 14 on the auger guide 1 side, so that a drilling operation as shown in FIG. 1 is possible. State.

  That is, the crane device 50 functions as a support device for the drilling device Z at the time of drilling work, and can be used for original crane work when the drilling device Z is removed. Since there is no speciality like the base carriage in the drilling device provided with the above, it can be effectively used.

B: Second Embodiment FIGS. 7 and 8 show a drilling device Z according to a second embodiment of the present invention. The hole drilling device Z has the same basic configuration as the hole drilling device Z in the first embodiment, and the only difference is the configuration of the hole drilling mechanism 3.

  That is, in the drilling device Z of the first embodiment, the drilling mechanism 3 including the down-the-hole hammer 31 provided with the hammer bit 32 and the connecting rod 33 is attached to the lower end side of the earth auger 2, and mainly a rock bed or the like. In contrast to drilling work on hard ground, the drilling device Z of this second embodiment is equipped with an auger screw 36 having a drilling head 35 at the tip, and drilling mainly on soft general ground. This is a point for drilling.

  Since the configuration and operational effects of the other parts are the same as in the case of the first embodiment, each component shown in FIGS. 7 and 8 corresponds to the component shown in FIGS. The same reference numerals are used, and the corresponding description of the first embodiment is used, and the description thereof is omitted here.

  It is a whole side view which shows the state at the time of the drilling start of the drilling apparatus which concerns on 1st Embodiment of this invention.   It is a whole side view which shows the state in the middle of the drilling of the said drilling apparatus.   It is a principal part disassembled perspective view of the said hole drilling apparatus.   It is IV-IV expanded sectional drawing of FIG.   It is a side view which shows the work state at the time of the attachment or detachment of the said hole drilling apparatus.   It is a side view which shows the state which removed the said hole drilling apparatus.   It is a whole side view which shows the state at the time of the drilling start of the drilling apparatus which concerns on 2nd Embodiment of this invention.   It is a whole side view which shows the state in the middle of the drilling of the said drilling apparatus.

Explanation of symbols

1 ..Auger guide 2 ..Earth auger 3 ..Hole drilling mechanism 11 ..Side plate 12 ..Back plate 13 ..Front plate 14 ..Guide part 15 ..Guide plate 16 .. Pin receiving hole 21. Part 22 ·· Engaging material 25 · · Hanging ring 31 · · Down the hole hammer 32 · · Hammer bit 33 · · Connecting rod 35 · · Drilling head 36 · · Auger screw 50 · · Crane device 51 · · Vehicle 52 · · Telescopic Boom 53 ..Boom head 54 ..Sheave assembly 55 ..Sheave pin 56 ..Sheave block 57 ..Suspension hook 58 ..Main winding wire rope 59 ..Suspension hook 60 ..Supplement winding wire rope Z.

Claims (3)

The telescopic boom (52) attached to the crane device (50) is swingable by a support pin (55) provided in a direction perpendicular to the hoisting surface of the telescopic boom (52). An auger guide (1) provided with a guide portion (14) supported in a suspended manner and extending in a substantially vertical direction in the suspended state;
An earth auger (2) that is hooked on a suspension hook (57) that is suspended from the tip of the telescopic boom (52) so as to be able to be wound and unwound. ) Engages with the guide portion (14) of the auger guide (1), so that relative rotation is restricted with respect to the auger guide (1) and is relatively movable along the guide portion (14). The earth auger (2)
A drilling mechanism (3) attached to the lower end side of the earth auger (2) and receiving a rotational force from the earth auger (2) to drill holes;
A hole drilling device characterized by comprising: In claim 1,
The hole drilling device, wherein the support pin (55) of the auger guide (1) is a sheave pin (55) for supporting a sheave assembly (54) disposed at a distal end portion of the telescopic boom (52). . In claim 1 or 2,
The engagement member (22) of the earth auger (2) is configured to be capable of being fitted and detached from the guide portion (14) from the lower end side of the auger guide (1). Drilling device.

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