JPH09316879A - Pile-driver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively perform work of supplying grease to a slide surface of a guide pipe with a guide arm. SOLUTION: A grease sump part 28 to hold grease is formed in a slide surface 27 of a guide arm 22 to slide with a guide pipe 13 provided on a leader 11, and grease is charged into the grease sump part 28 through a grease supply port. Compared to the case where grease is applied along the whole length of an outer circumferential surface of the guide pipe 13, grease supply work can be easily and effectively performed, and a front attachment 14 can be smoothly elevated along the leader 11 in pile driving work.

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, for example, a pile driving operation at a construction site.

[0002]

2. Description of the Related Art Generally, in a construction work site such as a building, the foundation of the ground is solidified by, for example, driving concrete piles into the ground or drilling the ground with a screw or the like and pouring concrete. Do pile work.

The pile driving machine used for the above-described pile driving work is generally a machine body having a hoisting drum, a leader supported by the machine body in a substantially upright state with respect to the ground, and a leader. It consists of a front attachment such as a drop hammer and earth auger that can be lifted and lowered.
The wire rope wound around the hoisting drum is wound between a top sheave provided on the upper end side of the leader and a front sheave provided on the upper end side of the front attachment.

In the pile driver constructed as described above,
The wire rope is taken up and unwound by the hoisting drum, and the front sheave that constitutes the moving pulley is moved up and down with respect to the top sheave, and the front attachment with the front sheave is moved up and down along the leader. At the same time, the pile attachment work is performed by the front attachment.

Here, the front attachment of the pile driving machine is usually provided with a guide arm for moving up and down along the leader during the pile driving work (for example, the actual opening 55).
-145540). This guide arm guides the front attachment along the leader by constantly sliding contact with the outer peripheral surface of a guide pipe provided in the length direction of the leader. Then, the reaction force of the pile driving work from the front attachment is transmitted to the leader via the guide arm and the guide pipe so that the leader receives the reaction force.

[0006]

By the way, since the above-mentioned guide arm is always in sliding contact with the outer peripheral surface of the guide pipe, the guide arm and the guide arm are guided by the friction of the up-and-down movement of the front attachment and the reaction force of the pile driving work. There is a risk that the sliding surface with the pipe will be worn or galled.

Therefore, conventionally, before the pile driving operation, grease (lubricant) is applied to the outer peripheral surface of the guide pipe, and the sliding surface between the guide pipe and the guide arm is lubricated, whereby the front attachment is attached to the leader. It is designed to be able to smoothly go up and down along.

However, the total length of the guide pipe is 20-40.
Therefore, there is a problem in that the grease coating work is performed over the entire length of the guide pipe, resulting in a waste of time and labor and the workability of the entire pile driving work is deteriorated.

In particular, when performing oblique pile construction in which a pile is driven diagonally to the ground, since the front attachment is moved up and down along a leader inclined with respect to the ground, the pile driving work is performed. When sliding along the guide pipe, the grease applied to the outer peripheral surface of the guide pipe is scraped off, and it becomes necessary to repeat the complicated grease applying work as described above. There is a problem that the property is significantly reduced.

The present invention has been made in view of the above-mentioned problems of the prior art, and the work of applying grease to the sliding surface of the guide pipe and the guide arm can be easily performed, and the front attachment can be installed along the leader. The purpose is to provide a pile driver that can be smoothly raised and lowered at all times.

[0011]

In order to solve the above-mentioned problems, the present invention provides a machine body, a leader supported by the machine body and provided with a guide pipe along the length direction, and the leader can be moved up and down. The present invention is applied to a pile driving machine including a front attachment that has a guide arm that is suspended from the leader and is slidably guided by the guide pipe of the leader.

The feature of the configuration adopted by the invention of claim 1 is that the guide arm of the front attachment is provided with a grease reservoir so as to retain grease in the space between the guide pipe and the guide pipe. is there.

According to the above construction, when the pile attachment work is performed while the front attachment moves up and down along the leader, the grease held in the grease reservoir of the guide arm causes the sliding contact surface between the guide pipe and the guide arm. Always lubricate.

According to a second aspect of the present invention, the guide arm includes a fixed portion fixed to the front attachment, a sliding contact portion that slidably contacts an outer peripheral surface of the guide pipe, and an inner peripheral side of the sliding contact portion. It is composed of a grease reservoir formed in the above and a greasing port for supplying grease from the outside to the grease reservoir.

According to the above construction, the grease is supplied from the outside into the grease reservoir through the greasing port, so that the grease can be efficiently supplied between the outer peripheral surface of the guide pipe and the sliding contact portion of the guide arm. It can be carried out.

Further, in the invention of claim 3, the guide arm is provided with a grease cup for storing the grease to be supplied to the grease reservoir.

According to the above construction, in addition to the grease held in the grease reservoir of the guide arm, a large amount of grease is stored in the grease cup so that the sliding contact surface between the guide pipe and the guide arm can be filled with the grease. It can be supplied without interruption.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

First, FIGS. 1 to 5 show a first embodiment of the present invention.
The above example is applied to an earth auger.

In the drawings, reference numeral 1 denotes an airframe, which has an undercarriage 2 having a crawler track and an upper revolving structure 3 rotatably provided on the undercarriage 2. The main winding drum 4, the auxiliary winding drum 5, and the undulating drum 6 are provided on the body 3.

Reference numeral 7 denotes an A-shaped frame provided on the upper revolving structure 3, and a guide sheave 7A around which an undulating rope 20 described later is wound is provided at the tip of the A-shaped frame 7. Reference numeral 8 denotes a back stay which is located on the rear side of the upper revolving structure 3 and is provided in a pair on the left and right (only one is shown). Support the department.

Reference numeral 9 denotes a front bracket provided on the front side of the upper swing body 3, and the front bracket 9 supports the lower end side of the leader 11 to support the back stay 8.
At the same time, the reader 11 is kept almost upright. Reference numeral 10 denotes a guide sheave rotatably provided on the upper surface side of the front bracket 9, and the guide sheave 10 guides a hoisting rope 21 (described later) wound around the main winding drum 4 upward.

Reference numeral 11 denotes a leader supported on the front side of the machine body 1. The leader 11 has a lower end side supported by a front bracket 9 and an axial intermediate portion supported by a backstay 8, and is substantially upright on the ground. It keeps the condition.

Here, as shown in FIGS. 2 and 3, the leader 11 projects forward from the outer peripheral surface of the cylindrical body 12 through a cylindrical body 12 made of a large-diameter pipe material and mounting plates 13A, 13A. And a pair of guide pipes 13 extending upward and downward at regular intervals over substantially the entire length of the cylindrical body 12. Each of the guide pipes 13 has a guide arm 22 to be described later. It is slidably engaged.

Reference numeral 14 denotes a front attachment suspended from the reader 11 so as to be able to move up and down. The front attachment 14 is provided with a drilling screw 15 and a drive source (not shown) for rotationally driving the screw 15. And an auger device 16. The front attachment 14 rotates the screw 15 by the drive source of the auger device 16 and ascends and descends along the leader 11 while being guided by the guide arm 22, thereby performing the drilling work by the screw 15.

Reference numeral 17 indicates a top sheave provided on the upper end side of the leader 11 via a sheave bracket 17A, and 18 indicates a front sheave provided on the upper end side of the front attachment 14 via a sheave bracket 18A. Sheave 17 and front sheave 18
Are each formed as an aggregate of a plurality of sheaves. The hoisting rope 21 is wound between the sheaves forming the top sheave 17 and the sheaves forming the front sheave 18, whereby the sheave for the front 1
8 forms a moving pulley with respect to the top sheave 17.

Reference numeral 19 denotes a guide sheave provided on the sheave bracket 17A located on the opposite side of the top sheave 17, and the guide sheave 19 has a hoisting rope 21 guided upward through the guide sheave 10 to the top. It guides the sheave 17 side.

Reference numeral 20 denotes an undulating rope wound on the undulating drum 6 at the base end side. The undulating rope 20 is made of a wire rope, and the tip end side thereof is a guide sheave 7 of the A-shaped frame 7.
It is locked to the axially intermediate portion of the reader 11 via A. The undulating rope 20 is to be erected in a substantially upright state by winding the undulating rope 20 around the undulating drum 6 when the pile driver is assembled.

Reference numeral 21 denotes a hoisting rope wound around the main winding drum 4 at the base end side, and the hoisting rope 21 is a wire rope, and is made from the main winding drum 4 via the guide sheaves 10, 19 and the like. After being guided to 17, the respective sheaves of the top sheave 17 and the sheaves of the front sheave 18 are sequentially wound. The tip end of the hoisting rope 21 is locked to the sheave bracket 17A, for example.
Then, by winding the hoisting rope 21 around the main winding drum 4, the front attachment 14 rises along the leader 11, and by unwinding the hoisting rope 21 from the main winding drum 4, the front attachment 14 becomes It descends along the leader 11.

, 22 are located between the guide pipes 13 of the leader 11 and are attached to the front attachment 14.
4 shows four guide arms provided at the front attachment 14 of the leader 11
It is slidably guided by each of the guide pipes 13 when going up and down along. Then, as shown in FIG. 3 to FIG.
Of the mounting bracket 23 fixed to the side surface facing the leader 11 and having a substantially U-shaped cross section and extending upward and downward, via a plurality of bolts 24, 24 ,.
It is fixed so as to be spaced downward.

Here, each guide arm 22 has a flat plate-shaped front side fixing portion 25 fixed to the outer surface of the mounting bracket 23 via each bolt 24, and a curved plate shape having a substantially semicircular cross-sectional shape. It consists of the leader side sliding contact part 26,
The inner peripheral side of the leader side sliding contact portion 26 is a sliding contact surface 27 that is in sliding contact with the outer peripheral surface of the guide pipe 13 of the leader 11. The two guide arms 22 are opposed to each other with the guide pipe 13 sandwiched therebetween, and the leader-side fixed portion 25 is fixed to the mounting bracket 23.
The sliding contact surface 27 of 6 is in sliding contact with the outer peripheral surface of each guide pipe 13 with a minute gap.

Reference numeral 28 denotes a grease reservoir portion formed on the sliding contact surface 27 of the guide arm 22. The grease reservoir portion 28 is located at the center of the sliding contact surface 27 and is formed in a substantially rectangular concave shape. . The grease reservoir 28 forms a space for holding a large amount of grease between the outer peripheral surface of each guide pipe 13 and the sliding contact surface 27 of each guide arm 22.

Reference numeral 29 denotes a greasing port which is bored in the leader-side sliding contact part 26 of the guide arm 22 and opens into the grease storing part 28. Through the greasing port 29, the grease storing part 28 is provided from the outside of the guide arm 22. The grease can be supplied inside.

A grease nipple 30 is attached to the greasing port 29, and the grease nipple 30 is a grease reservoir 28.
The grease is allowed to be supplied to the inside from the outside, and the grease filled in the grease reservoir 28 is prevented from leaking to the outside from the greasing port 29.

The pile driving machine according to the present embodiment has the above-described structure, and the hole drilling work (pile driving work) is performed using the pile driving machine.
When performing, the grease is supplied between each guide pipe 13 of the leader 11 and the sliding contact surface 27 of each guide arm 22 as a preparatory work.

In this case, by connecting a grease gun or the like to the grease nipple 30 provided on each guide arm 22, the grease is filled in the grease reservoir 28 from the outside of each guide arm 22 through the greasing port 29. The grease supply operation can be performed easily and efficiently.

Then, after the grease is filled in the grease reservoir 28 of each guide arm 22, the hoisting rope 21 is unwound from the main winding drum 4 while the screw 15 is rotationally driven by the auger device 16. 14 is guided by the guide arm 22 and the leader 11
Then, the drilling work by the screw 15 is performed.

At this time, each guide pipe 1 of the leader 11
The grease held in the grease reservoir 28 is constantly supplied between the outer peripheral surface of the guide arm 3 and the sliding contact surface 27 of each guide arm 22. Therefore, when each guide arm 22 slides along each guide pipe 13 as the front attachment 14 descends, the outer peripheral surface of each guide pipe 13 and the sliding contact surface 27 of each guide arm 22 are worn or galled. Can be prevented, and the front attachment 14 can be smoothly moved up and down along the leader 11 during a pile driving operation.

Moreover, since the grease reservoir 28 is provided on the sliding contact surface 27 of the guide arm 22, the grease can be concentratedly supplied between the guide pipes 13 and the sliding contact surface 27 of each guide arm 22. . As a result, for example, as described in the related art, it is possible to eliminate the troublesome work of applying grease over the entire length of the outer peripheral surface of the guide pipe 13, and to significantly reduce the amount of grease used. can do.

Next, FIGS. 6 and 7 show a second embodiment of the present invention.
Is shown. In this embodiment, the same components as those in the first embodiment described above are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, reference numerals 31 and 31 are applied to this embodiment in place of the guide arm 22 according to the first embodiment.
2 shows only one guide arm, and each guide arm 31 has a mounting bracket 23 fixed to the auger device 16 like the guide arm 22 according to the first embodiment.
Are fixed to each other via the bolts 24 so as to be separated from each other in the upper and lower directions.

As shown in FIG. 7, each guide arm 31 is composed of a flat plate-shaped front side fixing portion 32 and a curved plate-shaped leader side sliding contact portion 33 having a sliding contact surface 34 on the inner peripheral side. Although a grease reservoir 35 is provided in the center of the sliding contact surface 34, grease cups 36, which will be described later, are provided on the outer surface of each guide arm 31.

, Are four grease cups (2) attached to the outer surface of each guide arm 31.
Each of the grease cups 36 stores the supplied grease in the grease reservoir 35 of the guide arm 31. Here, the grease cup 36
Are fixed by, for example, bolting an "Ω" -shaped mounting band 37 holding the outer peripheral side thereof to the front side fixing portion 32. 38 is the grease cup 36 on the base end side.
The greasing hose connected to the lower end side of the greasing hose 38
The leading end side of the is connected to a greasing port 39 that is bored in the leader-side sliding contact portion 33 of the guide arm 31 and opens inside the grease reservoir 35.

The grease cup 36 communicates with the grease reservoir 35 of the guide arm 31 through the greasing hose 38 and the grease inlet 39, and the grease filled therein is directed to the grease reservoir 35 with a predetermined pressure. It is designed to discharge.

The present embodiment has the above-mentioned construction, and the basic operation thereof is not different from that of the first embodiment.

However, in this embodiment, each guide arm 3
By providing a grease cup 36 on each of the outer side surfaces of the first and filling a large amount of grease in the grease cup 36, the grease reservoir 35 of each guide arm 31 can be constantly filled with grease. Therefore, the grease can be continuously supplied between the outer peripheral surface of each guide pipe 13 of the leader 11 and the sliding contact surface 34 of each guide arm 31, and the front attachment 14 can be smoothly moved along the leader 11. Can be raised and lowered.

Further, the work of supplying grease between the guide pipes 13 of the leader 11 and the sliding contact surfaces 34 of the guide arms 31 can be performed more efficiently simply by filling the grease in the grease cup 36. The workability can be greatly improved.

In each of the above embodiments, the guide arm 2
The case where the grease reservoir 28 (35) having a rectangular concave shape is formed on the sliding contact surface 27 (34) of 2 (31) has been described as an example, but the present invention is not limited to this, and for example, as illustrated in FIG. 8
As in the modified example shown in FIG.
The grease reservoir 43 may be formed of an "X" -shaped groove on the bottom surface of the guide arm 44. Also, for example, as in the modification shown in FIG. The part 46 may be formed.

In each of the above embodiments, the case where the leader 11 is provided with the solid round bar-shaped guide pipe 13 has been described as an example, but the present invention is not limited to this, and may be, for example, a hollow cylindrical shape or a rectangular tube shape. Alternatively, a prismatic guide pipe may be applied.

Furthermore, in each of the above-mentioned embodiments, the earth auger equipped with a screw was taken as an example of the pile driving machine, but the present invention is not limited to this, and for example, a pile driver equipped with a hammer or a rotating machine. It can also be applied to other pile driving machines such as an earth drill equipped with a bucket.

[0051]

As described in detail above, according to the first aspect of the invention, the front attachment is provided along the leader by providing the grease reservoir on the guide arm which is in sliding contact with the outer peripheral surface of the guide pipe provided on the leader. When performing the pile driving work while moving up and down, the grease held in the grease reservoir lubricates the sliding contact surface between the guide pipe and the guide arm. Further, it is possible to prevent the sliding contact surface between the guide pipe and the guide arm from being worn or galled, and it is possible to smoothly move the front attachment up and down along the leader during the pile driving work.

Further, by filling the grease in the grease reservoir, the grease can be concentratedly supplied to the sliding contact surface between the guide pipe and the guide arm, so that, for example, the outer peripheral surface of the guide pipe extends over its entire length. As compared with the case where grease is applied by using the grease, the working time can be shortened and the amount of grease used can be significantly reduced.

According to the second aspect of the invention, since the grease can be supplied from the outside into the grease reservoir through the greasing port provided in the guide arm, the sliding contact surface between the guide pipe and the guide arm can be provided. The work of supplying grease can be performed more efficiently.

Further, according to the invention of claim 3, in addition to the grease held in the grease reservoir of the guide arm,
Since a large amount of grease can be stored in the grease cup, grease can be supplied to the sliding contact surface of the guide pipe and guide arm without interruption, and the front attachment can be smoothly moved up and down along the leader. Can be made. Further, by filling the grease in the grease cup, the grease supply work can be performed more efficiently, and the work time can be greatly shortened.

[Brief description of drawings]

FIG. 1 is an external view showing a pile driver according to a first embodiment of the present invention applied to an earth auger.

FIG. 2 is an enlarged side view showing a leader, a front attachment, a guide arm and the like shown in FIG.

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

FIG. 4 is a perspective view showing a guide arm.

FIG. 5 is an enlarged sectional view showing a guide arm and a guide pipe in FIG.

FIG. 6 is a side view of the same position as FIG. 2 showing a second embodiment.

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

FIG. 8 is a side view of a guide arm showing a modified example of the grease reservoir.

FIG. 9 is a side view of a guide arm showing another modified example of the grease reservoir.

[Explanation of symbols]

 1 Aircraft 11 Leader 13 Guide Pipe 14 Front Attachment 22, 31, 41, 44 Guide Arm 25, 32 Front Side Fixed Part (Fixed Part) 26, 33 Leader Side Sliding Contact Part (Sliding Contact Part) 27, 34 Sliding Contact Surface 28 , 35, 43, 46 Grease reservoir 29, 39 Greasing port 36 Grease cup

Claims (3)

[Claims] 1. A machine body, a leader supported by the machine body and provided with a guide pipe along the length direction, suspended from the leader so as to be able to move up and down, and slidably guided by the guide pipe of the leader. A pile driver comprising a front attachment having a guide arm, wherein the guide arm of the front attachment is provided with a grease reservoir so as to retain grease in a space between the guide pipe and the pile. Hammering machine. 2. The guide arm includes a fixed portion fixed to the front attachment, a sliding contact portion that slidably contacts an outer peripheral surface of the guide pipe, and a grease reservoir portion formed on an inner peripheral side of the sliding contact portion. And a greasing port for supplying grease to the grease reservoir from the outside.
Pile driver described in. 3. The pile driver according to claim 1, wherein the guide arm is provided with a grease cup for storing the grease supplied to the grease reservoir.