JPH10102491A - Pile-driver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct the mounting operation of a guide arm to a guide pipe for a leader and the exchange operation of the guide arm efficiently. SOLUTION: In the pile-driver, a guide mechanism 31 consisting of support brackets 32, support shafts 33 installed to the support brackets 32, and guide arms 35 rotatably supported by the support shafts 33 are mounted on the outer circumferential surface of an auger device 14, and an engaging holding mechanism 39 composed of pin fitting holes 32B, 32C formed in the support brackets 32, pin holes 38A formed in the guide arms 35, and locating pins 40 is set up. Accordingly, the guide arms 35 can be held rapidly at the places of engagement easily by rotating the guide arms 35 and engaging the guide arms 35 with guide pipes 11 and fitting the locating pins 40 into the pin fitting holes 32B and the pin holes 38A, and the mounting operation of the auger device 14 to a leader 9 can be conducted efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile driving machine suitably used for a pile driving operation at a construction site, for example.

[0002]

2. Description of the Related Art In general, at a construction site such as a building, a pile driving operation is performed at an initial stage of the construction by using a pile driving machine to solidify a ground foundation. The pile driver usually performs work by replacing a front attachment suitable for the type of the pile driving operation. For example, a drop hammer is applied as a front attachment when an operation of driving a concrete pile into the ground, and an earth auger is applied when an operation of digging a hole is performed.

[0003] As a conventional pile driver of this type, a pile driver equipped with an earth auger is shown in Figs.
This will be described with reference to FIG.

[0004] In the figure, reference numeral 1 denotes an airframe.
Has a lower traveling body 2 having a crawler belt, and an upper revolving superstructure 3 rotatably provided on the lower traveling body 2.
On the top are the main winding drum 4, auxiliary winding drum 5 and undulating drum 6.
Is provided.

[0005] Reference numeral 7 denotes a backstay provided on the rear side of the upper revolving unit 3 and provided on the left and right as a pair (only one is shown). The upper end of the backstay 7 has an axis of a reader 9 described later. It supports the middle part in the direction. Reference numeral 8 denotes a front bracket provided on the front side of the upper revolving unit. The front bracket 8 supports the lower end side of the leader 9 erected on the front side of the body 1 so that the leader 9 and the back stay 7 are substantially upright. It is to keep it in a state.

Here, as shown in FIG. 8, the leader 9 comprises a cylindrical body 10 made of a large-diameter pipe material and mounting plates 11A, 1A.
A pair of guide pipes 11, 1 are provided so as to protrude forward from the outer peripheral surface of the cylindrical body 10 via 1A, and extend upward and downward at regular intervals over substantially the entire length of the cylindrical body 10.
The guide arm 23 described later is slidably engaged with each guide pipe 11.

Reference numeral 12 denotes a front attachment suspended from the reader 9 so as to be able to move up and down. The front attachment 12 includes a screw 13 for drilling and a screw 1.
And an auger device 14 for rotating the auger 3. The front attachment 12 moves up and down along the reader 9 while rotating the screw 13 by the auger device 14, thereby performing a hole drilling operation with the screw 13.

Reference numeral 15 denotes a top sheave provided on the upper end side of the reader 9 via a sheave bracket 15A, 16 denotes a guide sheave provided on the sheave bracket 15A, and 17 connects to an upper end side of the auger device 14 via a bracket 14A. Respectively, the top sheave 15, the guide sheave 16 and the front sheave 17
, A hoisting rope 19 to be described later is wound, and the front sheave 17 forms a moving pulley.

Reference numeral 18 denotes an up-and-down rope wound on the up-and-down drum 6 at its base end. The up-and-down rope 18 is made of a wire rope, and its leading end is locked at an axially intermediate portion of the reader 9. Then, by winding the undulating rope 18 around the undulating drum 6, the leader 9 stands upright.

Reference numeral 19 denotes a hoisting rope wound on the main winding drum 4 on the base end side. The hoisting rope 19 is made of a wire rope, and is guided from the main winding drum 4 to the top sheave 15 and then to the guide sheave 16. And the front sheave 17. Then, by winding the hoisting rope 19 around the main winding drum 4, the front attachment 12 rises along the leader 9, and by unwinding the hoisting rope 19 from the main winding drum 4, the front attachment 12 It descends along the reader 9.

Reference numerals 20 and 20 denote each guide pipe 1 of the reader 9.
8 shows a guide mechanism provided on the front attachment 12 and located between the front attachment 12, and each guide mechanism 20 is fixed to the outer surface of the auger device 14 and extends toward the reader 9 as shown in FIG. (21) and two guide arms 23, 23 fixed to each mounting bracket 21 so as to face each other via a plurality of bolts 22, 22,... (Only two are shown).

The distal end of each guide arm 23
A curved sliding contact portion 23A having a substantially semicircular cross-sectional shape is formed, and the inner peripheral side of the sliding contact portion 23A slides on the outer peripheral surface of the guide pipe 11 of the reader 9 to raise the front attachment 12 along the guide pipe 11. , To guide downward.

[0013] In the pile driving machine thus configured,
By winding and unwinding the hoisting rope 19 by the main winding drum 4 and raising and lowering the front sheave 17,
While the front attachment 12 connected to the front sheave 17 is moved up and down along the leader 9, a pile driving operation (a drilling operation) is performed by the front attachment 12.

When the auger device 14 constituting the front attachment 12 is mounted on the reader 9 in the above-mentioned pile driving machine, first, for example, as shown in FIG. Then, the hoisting rope 19 is unwound from the main winding drum 4, the front sheave 17 is extended to the vicinity of the front attachment 12, and is connected to the bracket 14A of the auger device 14.

Next, the hoisting rope 1 is moved by the main winding drum 4.
9, the auger device 14 is lifted by about 1 m at the lower end side of the reader 9, and the guide arm 23 of each guide mechanism 20 is once removed from the mounting bracket 21. The fourteen guide mechanisms 20 face the reader 9 (see FIG. 11).

In this state, the removed guide arm 23
The auger device 14 is attached to the reader 9 via each guide arm 23 by fixing the sliding contact portion 23A to the mounting bracket 21 with the bolt 22 while engaging the sliding contact portion 23A with the outer peripheral surface of the guide pipe 11 of the leader 9 ( See FIG. 12).

[0017]

Thus, when attaching the auger device 14 to the reader 9 described above, it is necessary to attach and detach the guide arm 23 of the guide mechanism 20 to and from the mounting bracket 21. When the weight is large and the guide arm 23 is attached and detached,
Each time it is necessary to loosen or tighten a large number of bolts 22 with a large torque, there is a problem that the attaching and detaching work of the guide arm 23 is very complicated.

Further, there is a problem that the work of attaching and detaching the guide arm 23 constituting the upper guide mechanism 20 of the respective guide mechanisms 20 is a long-time work at a high place.

Further, when the auger device 14 is placed on the ground sideways, in order to prevent the auger device 14 from rolling on the ground, usually, for example, as shown in FIG. The tip of the arm 23 is grounded to stabilize the auger device 14.

For this reason, for example, the worn guide arm 2
When replacing the guide arm 23, the guide arm 23 must be replaced while the auger device 14 is lifted by using a crane or the like, and there is a problem that workability is poor.

The present invention has been made in view of the above-described problems of the prior art, and can easily perform a work of attaching a guide arm to a guide pipe of a reader and a work of exchanging a guide arm, thereby improving the workability. The purpose of the present invention is to provide a pile driving machine that is configured as described above.

[0022]

In order to solve the above-mentioned problems, the present invention comprises an airframe, a reader supported by the airframe and provided with a guide pipe along a longitudinal direction, and a guide mechanism, The present invention is applied to a pile driver having a front attachment which is connected to the guide pipe by this guide mechanism and is suspended along the leader so as to be able to move up and down.

A feature of the structure adopted in the first aspect of the present invention is that the guide mechanism is rotatably provided on the front attachment, and selectively engages and disengages with the guide pipe. In that it is constituted by rotating arm means that can be held at

According to the above construction, the rotating arm means selectively holds the engaging position and the disengaging position with respect to the guide pipe while rotating with respect to the front attachment. It can be easily attached to or detached from the guide pipe via the means.

According to a second aspect of the present invention, there is provided an airframe, a reader supported by the airframe and provided with a guide pipe along a longitudinal direction, and a guide mechanism, and the guide mechanism is connected to the guide pipe. In a pile driving machine including a front attachment suspended so as to be able to ascend and descend along the leader, the guide mechanism is parallel to a bracket protruding from the front attachment and an axial direction of the guide pipe. And a guide arm rotatably supported by the support shaft, the guide arm being rotatable about the support shaft and capable of engaging and disengaging from the guide pipe. And an engagement holding means for holding the state when the guide arm is rotated to the state engaged with the guide pipe. .

According to the above configuration, the guide arm engages with and disengages from the guide pipe by rotating about the support shaft provided on the bracket, and the guide arm engages with the guide pipe. When the guide arm is rotated to the fitted state, the front attachment can be easily attached to or detached from the guide pipe by holding the guide arm in that state by the engagement holding means.

According to a third aspect of the present invention, the guide arm has a cylindrical portion rotatably supported by the support shaft, and a slide extending from the cylindrical portion so as to be in sliding contact with the outer peripheral surface of the guide pipe. The engaging and holding means comprises a pin fitting hole provided in the bracket, a pin hole provided in the cylindrical portion of the guide arm, and a positioning pin fitted in each of the holes. It has been configured.

According to the above construction, when the sliding portion of the guide arm is rotated to be in sliding contact with the outer peripheral surface of the guide pipe, the pin fitting hole provided in the bracket and the pin hole provided in the cylindrical portion of the guide arm. By fitting the positioning pin to the guide arm, the guide arm can be held in a state engaged with the guide pipe.

[0029]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the embodiment, the same reference numerals are given to the same components as those of the above-described conventional technology,
The description is omitted.

In FIG. 1, reference numerals 31 and 31 denote guide mechanisms applied to the present embodiment in place of the guide mechanisms 20 according to the prior art. Each guide mechanism 31 is located between the guide pipe 11 of the reader 9 and the guide mechanism 31. And it is provided on the outer peripheral surface of the auger device 14 so as to be separated upward and downward.

Here, as shown in FIGS. 2 and 3, each guide mechanism 31 is provided between each support bracket 32, which will be described later, fixed to the outer peripheral surface of the auger device 14 facing the reader 9, and each support bracket 32. A supporting shaft 33 provided so as to be parallel to the axial direction of the guide pipe 11 and a cylindrical portion 36 on the base end side and rotatably supported by the supporting shaft 33;
A sliding contact portion 3 whose leading end slides on the outer peripheral surface of the guide pipe 11
7 and a guide arm 35.

Reference numerals 32, 32 denote a pair of support brackets which are fixed to the outer peripheral surface of the auger device 14 so as to be separated upward and downward, and each support bracket 32 has a width dimension substantially equal to the interval between the guide pipes 11. Formed as a plate-like body,
It is fixed to the outer peripheral surface of the auger device 14 by welding or the like so as to face each other. And each support bracket 3
2 is provided with shaft insertion holes 32A, 32A which are positioned on both sides in the width direction and through which both ends of the support shaft 33 are inserted.

The upper one of the support brackets 32 has a pin fitting hole 32B in which a positioning pin 40 to be described later is fitted at two places equidistant from each shaft insertion hole 32A. , 32C are drilled at angular intervals of about 90 degrees.

Reference numerals 33, 33 denote a pair of support shafts located on both sides of each support bracket 32 in the width direction and provided between the support brackets 32. Male screw portions 33A are provided at both ends of each support shaft 33.
Are formed. Each support shaft 33 is inserted into a shaft insertion hole 32 </ b> A of each support bracket 32, and a nut 34 is screwed into a male screw portion 33 </ b> A protruding from each support bracket 32. It is fixed between the support brackets 32 so as to extend in the direction.

Reference numerals 35, 35 denote guide arms positioned between the support brackets 32 and rotatably supported by the support shafts 33. Each guide arm 35 has a base end on which the support shaft 33 is inserted. A hollow cylindrical portion 36 having a hole 36A, and a curved plate-like sliding contact portion 37 having a semicircular cross-sectional shape extending from the cylindrical portion 36 toward the reader 9, and the inner peripheral side of the sliding contact portion 37 is a leader. 9 is configured to be in sliding contact with the outer peripheral surface of the guide pipe 11. On the upper end side of the guide arm 35, a protrusion 38 extending from the cylindrical portion 36 to the side opposite to the sliding contact portion 37 is provided.
A pin hole 38A is formed in which is fitted.

Each guide arm 35 has a sliding contact portion 37 centered on the support shaft 33 and each guide pipe 1 of the reader 9.
2 and a disengagement position (a position shown in FIG. 4) where the sliding contact portion 37 is disengaged from each guide pipe 11. At this time, the pin hole 38A formed in the protrusion 38 of the guide arm 35 is coaxially overlapped with the pin fitting hole 32B of the support bracket 32 when the guide arm 35 is at the engagement position, and the guide arm 35 is disengaged. Support bracket 32 when in position
And coaxially overlaps the pin fitting hole 32C.

Reference numeral 39 denotes an engagement holding mechanism as an engagement holding means for holding each guide arm 35 at an engagement position or a disengagement position. The engagement holding mechanism 39 is formed in the support bracket 32 as described above. Pin fitting holes 32B and 32C and a pin hole 38A formed in the projection 38 of the guide arm 35
And a positioning pin 40.

Reference numeral 40 denotes a positioning pin constituting the engagement holding mechanism 39. The positioning pin 40 includes a pin fitting hole 32B of the support bracket 32 and a pin hole 38 of the guide arm 35.
2A, the guide arm 35 is held at the engagement position shown in FIG. 2, and by fitting into the pin fitting hole 32C of the support bracket 32 and the pin hole 38A of the guide arm 35, the guide arm 35 is engaged. Is held at the detached position shown in FIG.

The present embodiment has the above-described configuration, and the operation of attaching and detaching the auger device 14 to and from the reader 9 using the guide mechanism 31 according to the present embodiment will be described below.

First, when attaching the auger device 14 to the reader 9, the positioning pins 40 are fitted into the pin fitting holes 32C of the support bracket 32 and the pin holes 38A of the guide arm 35 as shown in FIG. The guide mechanism 31 of the auger device 14 faces the guide pipe 11 of the reader 9 while each guide arm 35 is held at the detached position.

Next, the positioning pins 40 are inserted into the pin fitting holes 32.
The guide arm 35 is rotated around the support shaft 33 so that the sliding contact portion 37 of the guide arm 35 is engaged with the outer peripheral surface of the guide pipe 11. In this state, the positioning pins 40 are fitted into the pin fitting holes 32B of the support bracket 32 and the pin holes 38A of the guide arms 35, and the guide arms 35 are held at the engagement positions shown in FIG. The sliding contact portion 35 of the auger device 1 is held in a state of slidingly contacting the outer peripheral surface of each guide pipe 11 of the reader 9.
4 can be attached.

On the other hand, when removing the auger device 14 from the reader 9, the positioning pins 40 fitted in the pin fitting holes 32B of the support bracket 32 and the pin holes 38A of the guide arms 35 are removed, and each guide arm 35 is supported. After rotating to the detached position shown in FIG. 4 about the shaft 33, the pin fitting hole 32C of the support bracket 32 and the guide arm 3
The positioning pin 40 is fitted into the fifth pin hole 38A. Thereby, each guide arm 35 is held at the detached position, and the auger device 14 can be removed from the reader 9.

As described above, each guide arm 35 is connected to the support shaft 3.
By rotating the guide arm 3 around the center, each guide arm 35 can be quickly and easily disengaged from the guide pipe 11. Further, the positioning pin 40 is connected to the pin fitting hole 32B of the support bracket 32 and the guide arm 35.
By fitting into the pin holes 38A, the guide arms 35 can be held at the engagement positions, and the positioning pins 40 are inserted into the pin fitting holes 32C of the support bracket 32 and the pin holes 38A of the guide arms 35. By fitting, each guide arm 35 can be held at the detached position.

Accordingly, when the auger device 14 is attached to and detached from the leader 9 as compared with, for example, a pile driver having the guide mechanism 20 according to the prior art, the guide arm 2
The work of loosening and tightening the plurality of bolts 22 for engaging and disengaging the guide pipe 11 with the guide pipe 11 can be omitted, and the work of mounting and removing the auger device 14 can be performed efficiently.

The auger device 1 removed from the reader 9
In the case where the support bracket 32 is placed horizontally on the ground or the like, for example, as shown in FIG.
The auger device 14 can be stably placed horizontally without the load of the auger device 14 acting on each guide arm 35.

For this reason, for example, the worn guide arm 3
5 is replaced, the positioning pin 40 is removed from the state shown in FIG.
Is detached from each support bracket 32, the worn guide arm 35 can be easily removed.
Then, the guide arm 35 to be replaced is inserted between the support brackets 32, the support shaft 33 is inserted into the shaft hole 36A of the guide arm 35, and the nut 34 is screwed to the support shaft 33, so that a new guide arm is formed. 35 can be easily attached.

Therefore, as compared with the case where the guide arm 23 of the guide mechanism 20 according to the prior art is replaced, it is not necessary to lift the auger device 14 using a crane or the like. Can be done quickly and easily.

In the above embodiment, the engagement holding mechanism 39
A pin fitting hole 32B provided in the support bracket 32, a pin hole 38A provided in the projection 38 of the guide arm 35,
An example has been described in which the pin fitting hole 32B and the positioning pin 40 fitted in the pin hole 38A are used. However, the present invention is not limited to this. For example, a guide arm 41 having a flat surface 41A opposed to the outer peripheral surface of the auger device 14 is used as in a modification shown in FIG. The guide arm 41 may be positioned at the engagement position by engaging the wedge member 42 as the engagement holding means between the surface 41A and the outer peripheral surface of the auger device 14.

Further, in the above-described embodiment, the case where the solid round guide pipe 11 is provided in the reader 9 has been described as an example. However, the present invention is not limited to this. It may be applied to a prismatic guide pipe.

Further, in the above-described embodiment, a pile driver having an earth auger as a front attachment has been described as an example. However, the present invention is not limited to this. For example, another pile driver having a drop hammer or the like may be used. It can also be applied to a punching machine.

[0051]

As described above in detail, according to the first aspect of the present invention, by rotating the rotating arm means provided on the front attachment, the rotating arm means is engaged with the guide pipe. And the detached position are selectively held, so that when attaching and detaching the front attachment to and from the reader, the work of attaching and detaching the guide arm to and from the front attachment using bolts and the like is unnecessary. it can.

As a result, the work of attaching and detaching the front attachment to and from the reader can be performed easily and quickly. For example, even if the work of engaging and disengaging the guide arm with respect to the guide pipe becomes a high-place work, This operation can be performed in a short time.

According to the second aspect of the present invention, the guide arm is engaged with and disengaged from the guide pipe by rotating about the support shaft provided on the bracket, and the guide arm is connected to the guide pipe. Since the guide arm is held in that position by the engagement holding means when the guide arm is rotated to the state of being engaged with the pipe, a plurality of guide arms are engaged and disengaged from the guide pipe. The work of loosening and tightening the bolt can be eliminated. As a result, the work of attaching or detaching the front attachment to or from the guide pipe can be easily performed, and the workability can be greatly improved.

In addition, when the front attachment is placed on the ground or the like, the bracket is grounded while the guide arm is held at the detached position, so that the load of the front attachment is prevented from acting on the guide arm. Can be. As a result, the worn guide arm can be replaced while the front attachment is placed horizontally, so that, for example, when the guide arm is replaced, there is no need to lift the front attachment using a crane or the like, and the workability can be reduced. It can be greatly improved.

Further, according to the third aspect of the present invention, the positioning pin is fitted into the pin fitting hole provided in the bracket and the pin hole provided in the cylindrical portion of the guide arm, so that the sliding contact portion of the guide arm is provided. The guide arm can be easily held on the front attachment in a state where the guide arm slides on the outer peripheral surface of the guide pipe. As a result, for example, compared with the case where the guide arm is attached to and detached from the front attachment using a plurality of bolts, the work of loosening or tightening each bolt can be eliminated, and the attachment of the front attachment to the reader, Removal work can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is an enlarged side view showing a guide mechanism and the like according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view as seen from the direction of arrows II-II in FIG.

FIG. 3 is a perspective view showing a guide mechanism in FIG. 1;

FIG. 4 is a sectional view similar to FIG. 2, showing a state where the guide arm is positioned at a detached position.

5 is a cross-sectional view of the same position as FIG. 10 showing a state where the guide mechanism is grounded and the front attachment is placed on the ground.

FIG. 6 is a cross-sectional view showing a modification of the positioning means at the same position as in FIG. 2;

FIG. 7 is an external view showing a conventional pile driver.

FIG. 8 is a cross-sectional view as seen from the direction of arrows VIII-VIII in FIG.

FIG. 9 is an external view showing a state where a front attachment of the pile driver is removed from a leader.

FIG. 10 is a cross-sectional view as seen from the direction of arrows XX in FIG. 9;

FIG. 11 is an explanatory diagram showing a state in which the front attachment is lifted and the guide arm is removed.

FIG. 12 is an explanatory diagram showing a state where a front attachment is attached to a reader via a guide arm.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 9 Leader 11 Guide pipe 12 Front attachment 31 Guide mechanism 32 Support bracket (bracket) 32B, 32C Pin fitting hole 33 Support shaft 35, 41 Guide arm 36 Cylindrical part 37 Sliding contact part 38A Pin hole 39 Engagement holding mechanism ( Engagement holding means) 40 Positioning pin 42 Wedge member (engagement holding means)

Claims (3)

[Claims] An apparatus includes a body, a leader supported by the body and provided with a guide pipe along a length direction, and a guide mechanism. The guide mechanism is connected to the guide pipe, and is connected to the leader along the leader. In a pile driver comprising a front attachment suspended so as to be able to move up and down, the guide mechanism is provided rotatably on the front attachment, and selectively engages and disengages with the guide pipe. A pile driving machine characterized by being constituted by a rotating arm means capable of being held. 2. A body, a reader supported by the body and provided with a guide pipe along a length direction, and a guide mechanism. The guide mechanism is connected to the guide pipe by the guide mechanism. In a pile driver comprising a front attachment suspended so as to be able to move up and down, the guide mechanism is provided on the bracket so as to be parallel to an axial direction of the guide pipe and a bracket protruding from the front attachment. A support shaft rotatably supported by the support shaft, and a guide arm capable of engaging and disengaging from the guide pipe by rotating about the support shaft. A pile driving machine, comprising: engagement holding means for holding the state when it is turned into an engaged state with the guide pipe. 3. The guide arm includes: a tubular portion rotatably supported by the support shaft; and a sliding contact portion extending from the tubular portion so as to be in sliding contact with an outer peripheral surface of the guide pipe. 3. The engaging and holding means comprises a pin fitting hole provided in the bracket, a pin hole provided in a cylindrical portion of the guide arm, and a positioning pin fitted in each of the holes. The pile driver described in the above.