JPH07102561A - Vibration pile hammering machine - Google Patents

Abstract

PURPOSE:To perform nipping of the part, except an upper end part, of a pile by means of a chuck, to prevent oscillation of a pile during drive of a pile and pull-out of the pile, to effect drive of a pile even in a portion in the vicinity of a building, and to execute a work without needing a so wide space above the pile. CONSTITUTION:A vibration pile driver comprises a body 20 having an exciter 16, and a chuck 30 coupled to the lower side of the exciter 16 and vertically vibrated. A pile nipping part 30A of the chuck 30 is laid down in a direction crossing a vibration direction at right angles so that the pile nipping part is formed approximately in a C-shape in a plane view. A pile K is nipped by the pile nipping part 30A at a side apart from an outer peripheral surface 20a of the body 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a main body having an exciter and a chuck which is connected to the lower side of the exciter and vibrates in the vertical direction. The present invention relates to a vibrating pile driver that performs a work of driving a pile in a state of being clamped by a chuck while vertically vibrating the pile and pulling it out.

[0002]

2. Description of the Related Art Generally, a vibrating pile driver includes a main body 50 supported via a hanger (not shown) of a crane or a power shovel, as shown in the lower half of FIG. And a chuck 60 for sandwiching the pile K. The chuck 60 is a housing 50a of the main body 50.
It is connected to the lower side of a vibrator 56 supported inside via a cushioning material 56a such as cushioning rubber so that it can be vibrated in the vertical (vertical) direction shown by arrow Y in the figure.

Here, the chuck 60 includes a mounting portion 61 provided for connection with the vibration generator 56 and a pile of a C-shaped side view or a front side view which is continuously provided below the mounting portion 61. The pile sandwiching portion 60A includes a base portion 62 connected to the mounting portion 61 and a pair of opposing sandwiching piece portions 64 and 65 projecting downward from the base portion 62.
A fixed tooth 66 is fixed to the facing surface side of one of the opposing sandwiching piece portions 64 of the pile sandwiching portion 60A, and a pile is provided between the base portion 62 of the pile sandwiching portion 60A and the fixed tooth 66 of the other opposing sandwiching piece portion 65. A pinching drive mechanism 70 for moving the movable tooth 67 for pinching and restraining K in a direction of approaching and separating from the fixed tooth 66 is built in.

The pinching drive mechanism 70 includes a hydraulic or pneumatic cylinder 71 whose rear end is rotatably supported by a pin 72 on a base 62, and an upper end which has a pin 74 at the tip of a piston rod 71a of the cylinder 71. And a swing lever 75 having a center portion pivotally supported by a pin 76 on the opposing sandwiching piece portion 65, and a movable tooth 67 swingably attached to a lower end side opposing surface of the swing lever 75. There is.

When the pile K is clamped by the chuck 60 having such a structure, the piston rod 7 of the cylinder 71 is previously held.
1a is pulled in to lower the swing lever 75 and the movable teeth 67.
Is separated from the fixed tooth 66 as shown by the one-dot chain line in the figure, the upper end of the pile K is inserted between the fixed tooth 66 and the movable tooth 67, and then the cylinder 71 is actuated to move the piston. The rod 71a is projected. As a result, the swing lever 75 and the movable teeth 67 move to the positions shown by the solid lines in the figure, and the upper ends of the piles K are clamped by the fixed teeth 66 and the movable teeth 67, and the exciter 56 is operated in this state. Then, the pile K vibrates in the vertical direction together with the chuck 60, thereby reducing the frictional resistance between the pile K and the ground, and as a result, the pile K is driven into the ground by applying a downward load to the pile K. The pile K is pulled out from the ground by applying an upward pulling force to the pile K.

[0006]

By the way, in the conventional vibrating pile driver as described above, the chuck 60 faces downward C.
Since the pile is vertically erected in the vibration direction, that is, the vertical direction, and the pile holding portion 60A is located directly below the exciter 56, the pile is fixed to the main body 50.
It can be clamped just below and only at its upper end.

Under such a condition that the pile can be sandwiched just below the main body 50 and only at the upper end thereof, for example, when the pile is relatively long, the distance from the sandwiched portion (upper end) of the pile to the ground is long. Therefore, it is difficult to properly perform the work when pile driving / pulling work is performed, and it is difficult to perform the work properly. Since the outer peripheral portion of the main body 50 projects laterally from the sandwiching portion of the pile, the pile should be installed at a site close to a building or the like. Can't drive,
Since a space larger than substantially the entire length of the vibrating pile driver is required above the pile during pile driving / pulling work, it is not possible to perform pile driving / pulling work in an existing building or tunnel, for example. was there.

In view of such a point, the present invention is designed so that a portion other than the upper end portion of the pile can be clamped by the chuck so that the pile can be driven.
In addition to making it difficult to swing the pile during pulling work, it is possible to drive the pile close to the building etc., and it is possible to perform the above work without requiring a large space above the pile. An object is to provide a vibrating pile driver.

[0009]

In order to achieve the above object, a vibrating pile driver according to the present invention comprises a main body having an exciter, and a lower part of the exciter which is connected to a vibrating pile and vibrates vertically. And a pile clamping portion of the chuck is laid down in a direction orthogonal to the vibration direction so that the pile clamping portion in the chuck has a substantially C shape in a plan view, and the pile clamping portion causes the pile to be in the main body. It is characterized in that it is sandwiched laterally from the outer peripheral surface of the. The chuck may be rotatably attached to a main body having an exciter.

[0010]

[Operation] In the vibrating pile driver according to the present invention configured as described above, the pile holding portion of the chuck is laid sideways, and the pile can be held laterally from the outer peripheral surface of the main body. Since it is possible, the chuck can also clamp parts other than the upper end of the pile. Therefore, for example, when driving a comparatively long pile into the ground, the distance from the sandwiching portion of the pile to the ground can be shortened by moving the sandwiching portion of the pile by the chuck in a stepwise manner from the lower or central portion. As a result, the pile does not easily swing, and the work can be performed properly.Because the main body can be located outside the building than the pile, it is possible to drive the pile into a part close to the building, etc. By sandwiching the middle part of the pile with a chuck, the height position of the entire vibrating pile driver will be low during pile driving / pulling-out work, so a large space above the pile is not required. Pile driving / pulling-out work can be performed in buildings, tunnels, etc.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are a side view, a front view, and a plan view of an embodiment of a vibrating pile driver according to the present invention. The vibrating pile driver 10 of the illustrated example is supported by a connecting arm 5 attached to a working arm such as a hydraulic excavator (not shown) via a connecting tool 13 and is relatively rotated in a vertical plane and a horizontal plane. A hanger 15, a main body 20 supported on the hanger 15 by left and right connecting support shafts 17 so as to be capable of relative rotation in a vertical plane, a chuck 30 for sandwiching the pile K,
Is equipped with.

In this vibrating pile driving machine 10, a first rotary drive mechanism 22 including a hydraulic motor, a gear mechanism and the like for relatively rotating the connecting arm 5 and the hanger 15 in the horizontal plane is arranged between the connecting arm 5 and the hanger 15. With the hanger 15
A second rotary drive mechanism 25 including a hydraulic cylinder 24 and the like for rotating them relative to each other in a vertical plane is arranged between the main body 20 and the main body 20, and thereby remotely changing the postures of the hanger 15 and the main body 20. Automatically, quickly, easily, and safely, and the maneuverability and workability of pile driving / pulling-out work and pinching / releasing work of piles can be improved. Japanese Patent Laid-Open No. 4-
315609).

The chuck 30 is connected to the lower side of the vibrator 16 supported in the housing 20a of the main body 20 via a cushioning material 16a such as a cushioning rubber.
It can be vibrated in the vertical (vertical) direction indicated by arrow Y. Here, the chuck 30 has a mounting portion 31 having a flange portion 31a provided for connection with the vibration exciter 16, as can be seen by also referring to FIGS. 4 and 5.
With respect to the vibration direction of the chuck 60 (vertical direction indicated by arrow Y in FIG. 1) so that the chuck 60 is laid sideways on the lower side of the mounting portion 31, in other words, it has a substantially C-shape in a plan view. direction orthogonal Te is continuously provided integrally in a state of being laid in the (horizontal direction), and the side from the one end side outer peripheral surface of the main body 20 (the teeth 36 and 37 parts for clamping a pile K) (housing 20a) Pile clamping portion 30A that is protruded in one direction (left in FIG. 1) so that the pile K can be laterally clamped from the outer peripheral surface of the main body 20.
It consists of

The pile holding portion 30A is composed of a base portion 32 connected to the mounting portion 31 and a pair of opposing holding piece portions 34, 35 protruding laterally from the base portion 32. Pile clamp 30A
A fixed tooth 36 is fixed to the facing surface side of one of the opposing sandwiching piece portions 34, and the pile K is sandwiched between the base portion 32 of the pile sandwiching portion 30A and the other opposing sandwiching piece portion 35 with the fixed tooth 36. The movable tooth 37 for restraining the vehicle is approached to the fixed tooth 66-
A pinching drive mechanism 40 that moves in the direction of separating is incorporated.

The clamping drive mechanism 40 has a hydraulic or pneumatic cylinder 41 whose rear end is rotatably supported by a pin 42 on a base 32, and a base end which is a pin at the tip of a piston rod 41a of the cylinder 41. The slide member 48 is connected by 44 and its central portion is axially supported by the opposing holding piece portion 35 by a pin 46, and has a U-shaped cross section at its tip end side.
A movable tooth 37 is swingably attached so as to face the fixed tooth 48 via a swing lever 45 which is rotated in a horizontal plane about the pin 46 as a pivot.
It consists of

When the pile K is clamped by the chuck 30 having such a structure, as shown by the solid line in FIG.
The piston rod 41a of the cylinder 41 is pulled in advance to separate the tip end portion of the swing lever 45 and the movable tooth 37 from the fixed tooth 36, and an appropriate portion (not limited to the upper end portion) of the pile K is used as the fixed tooth 36. It is inserted between the movable teeth 37 and then the cylinder 41 is actuated to move the piston rod 4
1a is projected. As a result, the swing lever 45 and the movable teeth 37 move to the positions shown by the alternate long and short dash line in the figure, and the specific portion of the pile K is sandwiched between the fixed teeth 66 and the movable teeth 67. When actuated, the pile K vibrates in the vertical direction together with the chuck 30, which reduces the frictional resistance between the pile K and the ground. As a result, the pile K is driven into the ground by applying a downward load to the pile K. In addition, the pile K is pulled out from the ground by applying an upward pulling force to the pile K.

As described above, in the vibrating pile driving machine 10 of this embodiment, the pile holding portion 30A of the chuck 30 is laid sideways, and the pile K is fixed to the outer peripheral surface 20a of the main body 20.
Since it can be clamped more laterally, the chuck 30 can also clamp parts other than the upper end of the pile K. Therefore, for example, when driving a relatively long pile into the ground,
If the gripping portion of the pile K by the chuck 30 is gradually moved upward from the lower portion or the central portion, the distance from the gripping portion of the pile K to the ground can be shortened, and as a result, the pile is less likely to swing. , Work can be done properly.

Further, since the main body 20 can be located outside the pile K from the building, it is possible to drive the pile into a portion close to the building or the like. Further, if the chuck 30 clamps the middle portion of the pile, the height position of the entire vibrating pile driving machine 10 is lowered during the pile driving / pulling-out work, so that a large space above the pile K is not required, and accordingly, For example, pile driving / pulling work can be performed in an existing building or in a tunnel.

The pile holding portion 3 of the chuck 30 described above.
The configuration of 0A and the configuration of the clamping drive mechanism 40 are not limited to those described above, and various changes and modifications are possible. For example, one pile clamping unit 30A as in the above example.
Not only projecting to one side of the main body 20, but also projecting another pile holding part (30B) to the other side of the main body 20 so that two piles can be driven in and out at the same time. Of course, it is also good. Further, the shape and structure of the mounting portion 31 used for connection with the vibration generator 16 are also arbitrary, and in the above-described example, the mounting portion 31 having the flange portion 31a is integrally connected to the pile holding portion 30A. , The flange portion 31a
The chuck 30 is connected to the vibration generator 16 via the
Are connected to each other in a non-rotating state, but they may be connected to each other so as to be rotatable via an appropriate means.

FIG. 6 shows an example of another mode of the mounting portion used when the main body 20 and the chuck 30 are rotatably connected to each other. In this mounting portion 80, a first cylindrical body 83 having a mounting flange 82 is fitted to a support shaft 81 in a non-rotatable state, and a second cylindrical body 85 having a mounting flange 84 is attached to the above. It is attached to the support shaft 81 in a freely rotatable state. That is, the thrust bearing 86 is fitted to the opposing surfaces of the first cylindrical body 83 and the second cylindrical body 85, and the second cylindrical body 85 is further fitted.
Has an enlarged diameter portion 87 on the side of the flange 84. The enlarged diameter portion 87 has a thrust bearing 88 and an upper portion of the thrust bearing 88 that is not rotatable with respect to the support shaft 81, but has a large diameter portion 87. Cylindrical body 8 for locking with the inner surface being rotatable
9 is inserted. As a result, in the mounting portion 80, the first cylindrical body 83 and the second cylindrical body 85 are mounted on the support shaft 81 in a mutually rotatable state. Further, each flange 82, 84 is formed with a mounting hole 90 as shown in FIG. 6a.

By using this mounting portion 80, the main body 20 and the chuck 30 can be connected in a rotatable manner. That is, one flange 82 (84) is fixed to the side of the pile 30 of the chuck 30 by a suitable fixing means such as a bolt, and the other flange 84 (84) is similarly fixed by a suitable fixing means. It should be fixed to the side. Although not shown in the figure, an appropriate positioning means or a forced turning means such as a hydraulic motor, an electric motor and a gear mechanism is provided between the first cylindrical body 83 and the second cylindrical body 85 in the mounting portion 80. It is also possible to intervene.

By connecting the main body 20 and the chuck 30 continuously in such a rotatable manner, the connecting arm 5 is connected.
First rotary drive mechanism 2 arranged between the hanger 15 and the hanger 15.
It is possible to move the position of the pile K without moving in the horizontal plane without activating 2, and it is possible to easily and finely adjust the driving position of the pile K. In addition, the mounting portion 8 is attached to the flange portion 31a of the mounting portion 31 described above.
0 may be directly attached and used, in which case the chuck 30 can be selectively used in two modes of being fixed and rotatable with respect to the main body 20.

[0023]

As can be understood from the above description, according to the vibrating pile driving machine of the present invention, since the chuck can clamp the portion other than the upper end portion of the pile, the pile driving / pulling operation can be performed. It is extremely advantageous in practical use that it is possible to drive the piles hard to swing, and it is possible to drive the piles into the parts close to buildings, etc., and further, the above work can be performed without requiring a large space above the piles. Is obtained.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of a vibrating pile driver according to the present invention.

2 is a front view of the vibrating pile driver shown in FIG. 1. FIG.

3 is a plan view of the vibrating pile driver shown in FIG. 1. FIG.

FIG. 4 is a plan view showing a detailed configuration of a chuck of the vibrating pile driver shown in FIGS. 1 to 3.

5 is a perspective view showing the appearance of a chuck of the vibrating pile driver shown in FIGS. 1 to 3. FIG.

FIG. 6 is a diagram showing another aspect of the mounting portion.

FIG. 7 is a schematic diagram for explaining a conventional vibrating pile driver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Vibration pile driver 15 ... Hanger 16 ... Exciter 20 ... Main body 30 ... Chuck 30A ... Pile clamping part 36 ... Fixed tooth 37 ... Movable tooth 40 ... Clamping drive mechanism

Claims (2)

[Claims] 1. A vibrating pile driving machine comprising a main body having a vibrating machine and a chuck which is connected to a lower side of the vibrating machine and vibrates in a vertical direction, wherein a pile clamping portion of the chuck is a flat surface. It is laid down in a direction orthogonal to the above-mentioned vibration direction so as to have a substantially C-shape when viewed, and the pile holding portion holds the pile laterally from the outer peripheral surface of the main body. Characteristic vibration pile driver. 2. The vibrating pile driving machine according to claim 1, wherein the chuck is rotatably attached to a main body having an exciter.