JP2550322Y2 - Vibration pile driver - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibratory pile driver for driving a steel sheet pile, a steel pipe pile or a concrete pile into the ground, and more particularly to a vibratory pile driver used by being attached to a tip of a boom of a power shovel. .

[0002]

2. Description of the Related Art Generally, in a pile driving operation using a pile driving machine mounted on a power shovel, when a pile having a direction and an engaging portion such as a steel sheet pile is used, the sheet pile is gripped by a chuck and suspended vertically. After that, the excavator is turned to move to the driving position, and then the operator grasps the lower part of the steel sheet pile and positions the existing adjacent steel sheet pile and the respective joints as shown in FIG. After that, drive the vibrator and drive the steel sheet pile.

[0003] Positioning in a pile driving operation is very important. If the engagement with an adjacent sheet pile is poor and the sheet pile is shifted or inclined, the inclination of the sheet pile increases as the pile is driven. As a result, it cannot be driven in and the excessive force is applied to the existing adjacent sheet pile. In such a case, it is necessary to once again pull out the sheet pile in the middle of driving and then perform positioning again.

[0004] As described above, for positioning of the driving sheet pile, particularly for engagement of the joint portion, it is necessary for an operator to turn the pile driving machine while grasping the sheet pile and slightly adjusting it.

Conventionally, as a vibrating pile driver of this type, a swing frame is suspended and supported on a bottom plate of a top bracket attached to a boom of a power shovel, etc.
Some of the revolving frames have a vibrator driven by a hydraulic motor via a swing frame and a chuck which is opened and closed by a hydraulic cylinder (Japanese Utility Model Publication No. 54-2).
0242).

[0006]

However, the weight of a vibrator or a chuck suspended from the bottom plate of the top bracket via a revolving frame is quite heavy, so that the bottom plate of the top bracket and the revolving frame are heavy. A large frictional force is generated at the support portion. Therefore, when the turning frame is turned with respect to the top bracket, a considerably strong force must be applied to the turning frame.

For this reason, even when the angle of the steel sheet pile needs to be slightly changed in order to correctly engage the steel sheet piles as described above, the operator applies a considerably strong force to the turning frame to turn the steel sheet pile. Conversely, when the rotating frame is rotated, it rotates greatly due to inertia, so it is very difficult to rotate the rotating frame little by little to fine-tune the turning angle. there were.

Therefore, the present invention is to provide a vibratory pile driving machine which can easily perform fine adjustment of a turning angle with a small amount of labor and can position a steel sheet pile in a correct position in a correct posture. It is assumed that.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention fixes an outer ring having a concave groove on an inner peripheral surface to one of a bottom plate of a top bracket and a top plate of a revolving frame, and to the other, An inner ring having a concave groove on an outer peripheral surface fitted inside the outer ring is fixed, and a number of rotors are fitted between the concave groove of the outer ring and the concave groove of the inner ring so that the inner ring and the outer ring can rotate and cannot fall off. And a vibrator driven by a hydraulic motor via a swing frame and a chuck that is opened and closed by a hydraulic cylinder are mounted on the revolving frame.

[0010]

With the above structure, the outer ring, the inner ring, and the rotor fitted between the outer ring and the inner ring act as bearings, so that even if a large weight is applied to the turning frame, only a small force is applied. Thus, the turning frame can be easily turned by a required angle with respect to the top bracket.

[0011]

An embodiment of the present invention will be described below.

The vibratory pile driver comprises a top bracket 3 attached to the tip of a boom 1 of an earth-moving machine such as a power shovel, and a revolving frame 4 pivotally mounted below the top bracket 3 via a bearing mechanism 5. ,
The vibrator 20 includes a vibrator 20 attached to the revolving frame 4 via a swing frame 13, and a chuck 23 provided on a lower surface of the vibrator 20.

The top bracket 3 is attached to the tip of the boom 1 by a pin 2 so as to be swingable.

The bearing mechanism 5 includes an outer ring 7 having a concave groove on the inner peripheral surface, an inner ring 11 having a concave groove on the outer peripheral surface fitted inside the outer ring 7, a concave groove of the outer ring 7 and a concave The inner ring 11 and the outer ring 7 are rotatably mounted so as not to fall off.

In the illustrated embodiment, the outer ring 7 is fixed to the lower surface of the bottom plate 6 of the top bracket 3, and the inner ring 11 is fixed to the top plate 10 of the turning frame 4.

Further, in this embodiment, the inner wheel 11 can be turned with respect to the outer wheel 7 by a motor drive mechanism. That is, an inner gear 71 is formed on the inner peripheral surface of the inner ring 11, and a pinion 72 meshes with the inner gear 71, and the pinion 72 is driven by a hydraulic motor or the like fixed to the bottom plate 6 of the top bracket 3. The motor 73 is driven to rotate. The drive motor 73 is driven to drive the pinion 72
Is rotated, the inner ring 11 is rotated by the engagement between the pinion 72 and the internal gear 71. Therefore, the drive motor 7
By controlling 3, the inner ring 11 can be rotated by a required angle. Without providing this drive motor mechanism,
A configuration in which the turning frame side (actually, the sheet pile gripped by the chuck) is gripped and turned by human power may be used.

In the revolving frame, side plates 14 are formed on both left and right sides of the top plate 10, and vertically long holes 17 are formed at lower ends of the left and right side plates 14. The swing frame 13 is fitted between the left and right side plates 14. The swing frame 13 is
A horizontal shaft 16 provided at the outer lower end of the left and right side plates 15 is fitted into a vertically long hole 17 of the side plate 14 of the revolving frame 4, and the horizontal shaft 16
By attaching a nut 19 and a washer to the external thread on the outer side of the turning frame 4, it is mounted on the revolving frame 4 so as to be vertically movable and rotatable. The swing frame 13 is held at a vertical position and a horizontal position with respect to the turning frame 4, and a locking mechanism therefor is provided by the swing frame 13.
And the side plate 14 of the revolving frame 4. The locking mechanism includes a pressing member 74 pressed inward by a spring force, and a locking groove 7 into which the pressing member 74 fits.
5, the pressing element 74 is provided on the side plate 14 of the revolving frame 4, as shown in FIG. 5, and the locking groove 75 is located at two positions 90 ° apart from the side plate 15 of the swing frame 13. Is provided.

A vibrator 20 is attached to the swing frame 13 via a plurality of vibration isolating rubbers. As the vibrator 20, a known vibrator in which the eccentric weight in the machine box 22 is rotated by the hydraulic motor 21 can be used.

A chuck 23 is provided on the lower surface of the bottom plate 24 of the machine box 22. The chuck 23 includes a cylinder case 25 fixed to the bottom plate 24, a chuck holder 26 slidably mounted on the case 25, and a A hydraulic cylinder 27 for driving the chuck holder 26 is provided.

A chuck jaw 29 is fixed to the opposing surface of the cylinder case 25 and the chuck holder 26, and the piston rod 30 of the hydraulic cylinder 27 and the chuck holder 26 are connected by a link 31, and the chuck jaws are 29 is opened and closed.

The rotary joint 32 is, as shown in FIG. 4, a rotor 33 fixed to the top plate 10 of the revolving frame 4.
And a cylindrical body 34 outside thereof.

The rotary joint 32 is shown in FIG.
As shown in FIG. 5, the central opening 35 of the top plate 10 and the inner side of the inner ring 11 and the central opening 36 of the bottom plate 6 are located with a sufficient gap. Then, a rotor wristper 37 fixed to a part of the outside of the cylindrical body 34 is engaged with a notch 39 provided in the opening 36 as shown in FIG.

The rotor 33 of the rotary joint 32
As shown in FIG. 4, a swivel adapter 4
Then, both adapters 40 and 41 are connected to 90 ° adapters 42 and 43 on both sides of the hydraulic motor 21 by hydraulic hoses 44 and 45.

As shown in FIG. 4, oil passages 46 and 47 are formed in the rotor 33 so as to communicate with the adapters 40 and 41. The upper ends of the oil passages 46 and 47 are formed in a circumferential groove 49 provided on the outer periphery of the rotor 33. Connect to 50.

The circumferential groove 49 is formed on the inner circumference of the cylindrical body 34.
The peripheral grooves 51 and 52 are provided so as to face the peripheral groove 50.
The 90 ° adapters 53 and 54 are fixed to the connection ports leading to 52, respectively.

The 90 ° adapters 53, 54
And 30 ° adapters 59 and 6 inside joints 56 and 57 fixed to the left and right side plates 55 of the top bracket 3.
0 is communicated with hydraulic hoses 61 and 62.

The hydraulic hoses 63 and 64 connected to the joints 56 and 57 are connected to a hydraulic unit provided on a vehicle body or the like via a control valve (not shown).

Although not shown, the rotary joint 32 is provided with an oil passage for supplying and discharging pressure oil to and from the hydraulic cylinder 27, and this oil passage is connected to the hydraulic cylinder 27 and the hydraulic unit by a hydraulic hose. Communicate.

Next, the operation of the above embodiment will be described.

When the swing frame 13 is rotated with respect to the revolving frame 4 while operating the boom 1 and pressing the chuck claws 29 against the ground, the pusher 74 of the locking mechanism is locked in the vertical position in FIG. The swing frame 13 is released from the groove 75 and locked in the locking groove 75 in the horizontal position, and the swing frame 13 is held in the horizontal position.

In this state, the chuck jaws 29 are opened by operating the hydraulic cylinder 27 and inserted into one end of the lying steel sheet pile, and the chuck jaws 29 are closed by operating the hydraulic cylinder 27 to grip the steel sheet pile.

Next, when the top bracket 3 is raised by operating the boom 1, the presser 74 locked in the horizontal state is disengaged from the locking groove 75 in the horizontal position due to the weight of the steel sheet pile and the vibrator. As a result, the swing frame 13 returns to the vertical state, and the presser 74 is fitted in the locking groove 75 in the vertical position and is held in the vertical state.

Then, the boom 1 is operated to raise the top bracket 3, and the steel sheet pile gripped by the chuck 23 is moved to a target driving position, and the steel sheet pile is set upright. To properly engage the adjacent steel sheet pile with its joint. Alternatively, in the case of using a drive motor, the inner ring 11 is rotated via the pinion 72 by driving the drive motor 73, and the direction of the steel sheet pile is adjusted to a predetermined direction.

Thereafter, the hydraulic motor 21 is rotated to vibrate the vibrator 20, and the vibration drives the steel sheet pile into the ground.

[0035]

According to the present invention, as described above, a heavy turning frame, a vibrator, etc., can be easily turned by an arbitrary angle with a relatively small force with respect to a top bracket attached to a boom. Since the turning angle can be finely adjusted, the positioning of the pile and the adjustment of the driving angle can be performed accurately and easily, and the labor of the operator can be reduced.

When a hydraulic motor is used, the turning angle can be controlled in the operation room of the power shovel, and also has a function of preventing a rotational displacement which tends to occur when the vibrator is operated.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal front view of an embodiment.

FIG. 2 is a side view of the above.

FIG. 3 is a partially cutaway enlarged top view of the above.

FIG. 4 is an enlarged vertical sectional view of the rotary joint according to the first embodiment;

FIG. 5 is a longitudinal sectional view of the locking mechanism of the above.

FIG. 6 is a diagram showing an engaged state of a steel sheet pile.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Boom 3 Top bracket 4 Revolving frame 5 Bearing mechanism 6 Bottom plate 7 Outer ring 10 Top plate 11 Inner ring 12 Rotor 13 Swinging frame 14 Side plate 16 Horizontal axis 20 Vibrator 21 Hydraulic motor 23 Chuck 27 Hydraulic cylinder 32 Rotary joint 71 Internal gear 72 Pinion 73 Drive motor A Steel sheet pile a Joint part

Claims (3)

(57) [Scope of request for utility model registration] An outer ring having a concave groove on an inner peripheral surface is fixed to one of a bottom plate of a top bracket and a top plate of a revolving frame,
On the other hand, an inner ring having a concave groove on the outer peripheral surface fitted on the inner side of the outer ring is fixed, and a number of rotors are fitted between the concave groove of the outer ring and the concave groove of the inner ring so that the inner ring and the outer ring can rotate. A vibratory pile driving machine which is mounted so as not to fall off, and is provided with a vibrator driven by a hydraulic motor via a swing frame and a chuck which is opened and closed by a hydraulic cylinder, on the turning frame. 2. The hydraulic unit according to claim 1, wherein the hydraulic piping to the hydraulic motor and the hydraulic cylinder is connected to a hydraulic unit via a rotary joint mounted between a bottom plate of a top bracket and a top plate of a revolving frame. Vibration pile driver as described. 3. The vibratory pile driving machine according to claim 1, wherein a motor drive mechanism for turning and driving an outer ring or an inner ring is attached to a bottom plate of the top bracket.