JPS5848690B2 - Vibratory pile driving and pile extraction machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pile driving/pulling machine for driving or pulling out earth retaining piles, sheet piles, etc. More specifically, the present invention relates to a pile driving/pulling machine for driving or pulling out earth retaining piles, sheet piles, etc. This is a vibratory pile driving and pile extracting machine in which a vibro device with a chuck attached is attached as an attachment to the arm of a power shovel used for excavation work, etc.

In conventional pile driving and pile extraction work using a vibrating type, a truck crane or crawler crane was used as the base machine for the pile driving and pile extraction machine, but this conventional pile driving and pile extraction work had the following problems. there were.

(1) Equipment costs were high because expensive truck cranes and crawler cranes had to be used.

(2) Since electricity is used as a power source, a generator is required at construction sites where there is no commercial power source.

(3) Pile driving and pile extraction work requires a large number of workers (3 or more), making the labor cost high.

(4) Crawler crane LJ Since it is transported by l-railer, it is also... Since truck cranes are large, it is not possible to carry IJ crawler cranes or truck cranes into construction sites where the road width is narrow, and therefore, it is not possible to drive piles using a vibrating pile driver.

(5) When attaching and detaching piles to the chuck part of a pile driving and extracting machine, a separate crane is required and additional human assistance is required, which poses a risk of personal injury due to the pile falling over.

The present invention has been made in order to solve the above-mentioned problems in pile driving and pile extraction using the conventional vibrating type pile driving and pile extracting machine. The first object of the present invention is to provide a vibrating pile driving and pile extracting machine that can be attached as an attachment to the tip of a pile driver to improve economical efficiency and workability.

Further, the present invention provides a vibratory pile driving and pile extraction machine as described above, in which a stopper mechanism for limiting the tilting angle of the vibro device is provided between the vibro device and a hanging member that suspends and supports the vibro device, Another object of the present invention is to thereby make it possible to restrict the swinging of the vibro device during the work of gripping or stacking piles or sheet piles with the chuck.

Hereinafter, the vibrating pile driving and piling machine of the present invention will be explained based on the illustrated embodiment. In Figs. The foldable arm B is a foldable arm that is attached to be able to be raised and lowered freely.The foldable arm B is formed by connecting a proximal arm 6 and a distal arm 7 with each other via a pin 8 so as to be foldable.

When used as a power shovel, a packet is attached to the distal end of the distal arm 7, but FIG. 1 shows a state in which this packet has been removed and a vibro device C has been attached in its place.

The vibro device C is further foldably attached using an auxiliary arm 4, which is detachably attached to the tip of the foldable arm B, as a hanging member.

This vibro device C includes a vibrator 1 that generates vibration in the vertical direction, a chuck support device 2 located at the bottom of the vibrator 1,
It consists of a chuck 3 for holding a pile attached to the chuck support device 2.

This vibrating pile driving and pile extracting machine is hydraulically expandable and retractable at three points: the joint between the power shovel body A and the folding arm B, the middle part of the folding arm B, and the joint between the tip of the arm B and the auxiliary arm 4. The devices E, F, and G are mutually bendable, and the vibro device C can freely rotate in a vertical plane relative to the auxiliary arm 4.

This vibratory pile driving and pile extracting machine allows one person to operate various hydraulic devices from the cockpit K, such as gripping the pile D, starting the exciter 1, and bending each bending part. It has become.

The auxiliary arm 4 attached to the tip of the foldable arm B is 2
As shown in FIG. 3, these plate-like arms have their rear ends pivoted to the tip of the distal arm 7 of the folding arm B by a pin 9, and further By connecting the rod 12 of the hydraulic expansion/contraction device G attached to the folding arm B side to the pin 10 installed between the plate-shaped arms, the arm can be bent freely relative to the tip of the folding arm B. .

Each of the plate-like arms is formed by joining two plates 4a and 4b, and a vibration-proof rubber 45 is interposed between the plates 4a and 4b.

{1 exciter 1 is placed at the tip of the auxiliary arm 4 in a predetermined angle range 2θ
(Fig. 7) is pivotably supported.

That is, shafts 1LII fixed outwardly at opposing positions in the casing 1a of the exciter 1 are loosely attached to the tips of the respective auxiliary arms 4, and pins protrude from the outer surface of the exciter casing 1a. 20 is inserted into the arcuate hole 47 formed in the auxiliary arm 4, and the range (2θ) of the arcuate hole 47 is
The exciter 1 is configured so that it can be oscillated only within the interior.

That is, these bottles 20 and arcuate holes 47 are connected to the vibro device C.
It acts as a stopper mechanism to limit the tilt angle between the vibro device C and the auxiliary arm 4, which is a hanging member thereof, and to prevent the vibro device C from swinging beyond the tilt angle.

Incidentally, vibration isolating rubber 46, 46 is provided on the outer side of the shaft 11 as shown in FIGS. 6 and 7.

As shown in FIG. 4, the exciter 1 includes a drive rotor unit 14 driven by a hydraulic motor 13 inside its casing 1a, and a drive rotor unit 14 that is synchronously connected to the drive rotor unit 14 through gears 35 and 36. The driven rotor units 15 that are rotated are arranged side by side in the horizontal direction.

The drive side rotor unit 14 has one semicircular eccentric weight 1γ←eccentric mass 2W) fixed to the shaft 16, and the driven side rotor unit 15 has two semicircular eccentric weights fixed to the shaft 18. Weights 19, 19 (each eccentric mass W) are fixed.

The rotor units 14 and 15 are configured to rotate synchronously in opposite directions to generate vertical vibrations in the exciter 1.

In addition, when the eccentric weights 11 and 19, 19 rotate synchronously in opposite directions, the centrifugal forces in the horizontal direction of the eccentric weights 17 and 19, 19 are canceled out, so that no lateral vibration occurs. It has become.

In addition, the auxiliary arm 4 equipped with the exciter 1 and the bendable arm B
A vibration isolator 40 is interposed between the two.

This vibration isolating device 40 {j includes the tip 12a of the rod 12 of the hydraulic expansion/contraction device G attached to the tip of the arm and the bracket 4,
The rod tip 12a is inserted into the vibration-proof case 41, and springs 42.
43 is interposed therebetween.

Chuck support device 2 attached to the bottom of the exciter 1
{1 As shown in Fig. 3 and Fig. 5, it is composed of an inner shaft body 21 fixed to the lower part of the exciter 1 and an outer case 22 to which the chuck 3 is fixed, and the outer case 22 is further connected to the inner shaft body. 21 so as to be rotatable in the horizontal direction.

The inner shaft body 21 is inserted into the center of the outer case 22.

Further, a lower portion of the inner shaft body 21 is formed with an outwardly directed flange 23, and thrust bearings 24, 24 are disposed at the upper and lower portions of the flange 23, respectively.

A tightening member 25 is interposed inside the chuck support device 2 to tighten the space between the inner shaft body 21 and the outer case 22 in the vertical direction.

This tightening member 25 is formed by fan-shaped wedge pieces 26, 26, 26 which are divided into three parts in the same direction, and whose upper and lower surfaces are each tapered in the same direction outwardly. A bolt 27 is attached to each of the wedge pieces 26 so as to pass through the outer case 22.

A disk-shaped spacer 29 whose upper surface is inclined downwardly inward is interposed at the lower part of the tightening member 25 (between the tightening member 25 and the upper thrust bearing 24). A lid 30 is attached to the upper part of the lid 30, the lower surface of which is sloped outward.

This lid 30 is firmly bolted to the upper end opening of the outer case 22.

The tightening member 25 acts to pull each wedge piece 26 outward by tightening a nut 28 from the outside of the outer case 22 onto a bolt 27 fixed to each wedge piece 26. The inner shaft body 21 and the outer case 2
2 can be tightened in the vertical direction.

A key 26a for preventing rotation is attached to the upper surface of each wedge piece 26, and by fitting the key 26a into a key groove 30a formed on the lower surface of the lid 30, the wedge piece 26 can be moved forward and backward only in the outward and outward directions. It is formed in such a way that it can be

The outer case 22 has a thrust bearing 24. Although it is rotatably attached to the inner shaft body 21 via a bolt 24, vertical rattling between the outer case 22 and the inner shaft body 21 is prevented by the tightening member 25.

The chuck 3 is fixed to the lower surface of the outer case 22 of the chuck support device 2.

This chuck 3 is composed of a fixed side claw member 31 that is tapered to a sharp point and a movable side claw member 32 that is shorter than the fixed side claw member 31, and the movable side claw member 32 is connected to the hydraulic expansion and contraction device 3
3, it is moved forward and backward in the inward and outward directions.

A hydraulic pipe 34 installed through the center of the chuck support device 2 is connected to this hydraulic expansion/contraction device 33, so that the chuck 3 can be opened and closed from the control room K of the power shovel body A. ing.

Next, how to use this vibrating pile driving and pile extracting machine and its function will be explained.

The pile D is placed horizontally at the construction site, but when the pile D is to be gripped by the chuck 3, the foldable arm B1, the auxiliary arm 4, and the vibro device C are each bent as shown in FIG. Aim the fixed side claw member 31, which has a tapered shape, on the lower side and be almost parallel to the ground L, and cut the tip of the stake D from the lower side of the fixed side claw member 31. Insert it like this.

In this case, since the vibro device C can only tilt within the range of angle 2θ with respect to the auxiliary arm 4, the chuck 3 can be held in a suitable posture when the chuck 3 grips the pile D.

After that, the hydraulic expansion/contraction device 33 is activated and the movable claw member 3
2 to make the chuck 3 grip the stake D.

Next, as shown in Fig. 1, the folding arm B and the auxiliary arm 4 are raised, the pile D is vertically erected at the planned driving position in the ground L, and the pile D is rotated so that it faces a predetermined position. .

It should be noted that the outer case 22 of the pile Dtj and the chuck support device 2 is rotatable with respect to the inner shaft body 21 (Figs. 2 and 3, arrow R).
), so it can be easily rotated.

In this case, the hydraulic telescoping device G (for packet rotation) connecting the tip of the folding arm B and the auxiliary arm 4 is compressed.
If it is made smaller, the auxiliary arm 4 can be pulled up, and accordingly, the vibro device C can be pulled up further above the tip of the foldable arm B, and the stake D can be pulled up to a high position.

Therefore, it is possible to drive or pull out a longer pile D.

Furthermore, if the hydraulic expansion/contraction device G is extended, the auxiliary arm 4 will extend forward, allowing it to be moved further away (for example, on the opposite bank of a waterway).
It becomes possible to perform pile driving and pile extraction work.

Then, when the hydraulic moke 13 is driven, the exciter 1 generates vibrations in the vertical direction, and the piles D are driven into the ground by the vibrations.

At this time, if the tip side of the bendable arm B is pressed downward, the entry of the pile D into the ground will be promoted.

Note that when the tip of arm B descends downward as pile D approaches, the auxiliary arm 4 may tilt slightly in the vertical plane, but as shown in Figure 7, the auxiliary arm 4 and exciter 1 are mutually rotatable within a predetermined range 2θ, so the vibro device C always maintains a vertical posture with respect to the ground L, and no unnatural load is applied to the pile D and the bendable arm B. .

When the driving of the first pile D is completed, the next pile D is similarly driven in line with the previously driven pile D.

At that time, as shown in Fig. 2, the adjacent piles D and D are fitted with each other upside down, so when the pile D adjacent to the previously driven pile D is suspended by the chuck 3. Rotate it in the appropriate direction.

When the vibrator 1 is driven, a relatively large vertical vibration occurs in the whole vibro device 0, but in this embodiment (j) the vibration toward the bending arm B side is caused by
, 46, anti-vibration rubber 45 , 4 interposed on the auxiliary arm 4
5 and the vibration isolating device 40 provided between the hydraulic expansion/contraction device G and the pin 10, and the vibration is absorbed and significantly reduced.

When pulling out the piles D, D... that have been driven into the ground, 11,
The pile D can be easily pulled out by bending the bending arm B downward and gripping the pile D with the chuck 3, and raising the bending arm B while vibrating the exciter 1. D can be stacked and organized in sequence without any human intervention.

Even during this work of stacking piles D, the relative rotation of the vibro device C with respect to the auxiliary arm 4 is restricted by the stopper mechanism, so the vibro device C does not wobble during the tilting process of the piles D, and the work can be carried out safely. It can be performed.

Next, to explain the effects of the present invention, the vibrating pile driving and pile extracting machine of the present invention has the following effects.

(1) The vibro device C is attached to the tip of the foldable arm B of the power shovel used for excavation work, etc., so it can be used for pile driving and pile extraction work using a vibrating pile driving machine. can omit the previously required truck crane or crawler crane.

(2) As long as a power shovel can pass through the construction site, it is possible to drive and pull out piles using a vibrating pile driver even in narrow spaces that were previously impossible.

(3) Since a hydraulic pump is used as the power source for vibration generation, work can be performed even in areas without power supply.

(4) Vibro device C for the vibro device hanging member 4
Since the tilting angle of the vibro device C is regulated by a stopper mechanism provided between the two, rocking or wobbling of the vibro device C can be prevented during gripping or stacking work of piles or sheet piles D. It can be done easily and safely.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the overall structure of a vibrating pile driver and pile extractor according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of the bottom part of the pile driver and pile extractor shown in FIG. 1, and FIG. Fig. 4 is a perspective view of the internal structure of the exciter used in the pile driving/pulling machine shown in Fig. 1, and Fig. 5 is a half-section exploded perspective view showing the internal structure of the chuck support device. 6 is a cross-sectional view taken along the line Vl-VI in FIG. 2, FIG. 7 is a view taken along the Y arrow in FIG. 2, and FIG. 8 is an explanatory diagram of the operation of the pile driving/pulling machine shown in FIG. 1. A: Power excavator body, B: Foldable arm, C: Vibro device, D:
...Pile, G...Hydraulic expansion and contraction device, 1...
Vibrator, 2...Chuck support device, 3...
... Chuck, 4 ... Vibro device hanging member,
13...Hydraulic motor, 21...Inner shaft body, 22...Outer case, 31. 32...
... Claw member, 40 ... Vibration isolator.

Claims (1)

[Claims] 1. A vibro device C is installed at the tip of the bendable arm B, and is configured to transmit vertical vibrations from an exciter 1 powered by a hydraulic motor 13 to a chuck 3 for gripping a pile or sheet pile D. This is a vibratory pile driving and piling machine which is further attached to the arm B via an appropriate vibro device suspension member 4 in a manner that it can be bent, and between the vibro device C and the vibro device suspension member 4. A vibrating pile driving/pulling machine characterized by being equipped with a stopper mechanism for limiting mutual tilting angles.