JP2004183312A - Piling apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piling apparatus, facilitating assembling and manufactured at a low cost. <P>SOLUTION: A base machine 1 is provided with a boom 11 and capable of freely traveling. A bracket 2 is removably provided on the tip of the boom 11 of the base machine 1, and supported on the boom 11 to rock in the longitudinal direction and in the lateral direction. A leader 3 is connected to a boom 11 of the base machine 1 through the bracket 2, and the tip part thereof is provided with a reaction force plate 32. An earth auger 4 is provided to freely elevate along the leader 3. A valve box 5 is provided on the leader 3, thereby controlling a hydraulic driving part of the earth auger 4. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pile driving device used in pile driving work for reinforcing a foundation, particularly in excavation work.
[0002]
[Prior art]
When building houses and other structures on the ground, stakeout may be performed on the ground. In pile driving work, in general, after drilling the ground in advance with a ground excavator such as an earth auger, the pile is inserted into the hole, and the pile is driven into the ground with a pile driver equipped with a hammer, hydraulic jack, etc. It is done.
[0003]
There are various types of pile driving devices such as an excavator and a pile driver, such as an excavator and a pile driver that are separately configured or integrally configured. As an example, a support arm is tiltably supported on a front bracket protruding from a turntable on a self-propelled vehicle, and a lower end of the leader is supported at a free end of the support arm. The lower arm of the supporting arm is supported on the front bracket so that the lower part of the supporting arm can be tilted on the front bracket and the tilting fulcrum can move back and forth, and the lower part of the supporting arm is connected to the cylinder device. (See Patent Document 1).
[0004]
According to such a pile driver, the leader is moved back and forth by moving the support arm back and forth on the front bracket and at the same time by extending and retracting the back stay, and the distance from the rotation center of the swivel to the leader is increased by the cylinder device. fluctuate. For this reason, the turning radius of the leader, that is, the working radius can be enlarged or reduced according to the working situation. However, due to the structure in which the leader is supported at two points, the support arm and the back stay, the work radius that can be enlarged or reduced is small, and the work efficiency is not always good.
[0005]
In addition, the conventional pile driver was built on the assumption that work was performed on flat ground, and the leader could not be tilted with respect to the bogie. Therefore, in order to perform the pile driving work on an inclined land or a place with a lot of undulations, it was necessary to first perform a reclamation work, level the inclined ground, and hold the cart in a horizontal state. This construction work not only wastes a lot of work time, labor and construction costs, but also has a problem that a large amount of waste soil destroys the natural environment around the work site.
[0006]
Above all, in the conventional pile driving device, since the self-propelled bogie was configured only as a vehicle dedicated to pile driving work, generally, a hydraulic drive unit such as a winch, a clutch device, and a cylinder device and a hydraulic drive unit for operating these hydraulic drive units are generally used. The switching valve was provided on the side of the self-propelled truck. As described above, the conventional pile driving device has a problem that the structure is complicated and the production thereof requires a considerable cost.
[0007]
[Patent Document 1]
JP-A-11-303078 (page 1-2, FIG. 1)
[0008]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the related art, and an object of the present invention is to provide a pile driving device that can be easily assembled and manufactured at low cost.
[0009]
Another object of the present invention is to provide a pile driving device capable of greatly reducing the operation time, labor, and labor required for the pile driving operation.
[0010]
[Means for Solving the Problems]
The pile driving device according to the present invention includes a base machine having a boom, which is freely movable, a bracket detachably provided at a tip of the boom of the base machine, and the boom of the base machine via the bracket. A leader having a reaction force plate at a distal end thereof connected thereto, an earth auger provided to be able to move up and down along the leader, and a valve provided on the leader and operating a hydraulic drive unit such as the earth auger And a bracket, wherein the bracket is swingably supported in the front-rear direction and the left-right direction with respect to the boom.
[0011]
As described above, according to the pile driving device of the present invention, all of the hydraulic drive units required for excavation such as an earth auger and the valve box for controlling these hydraulic drive units are located on the side of the leader, not the base machine. The excavator can be used as an excavator simply by changing the existing attachment of the power shovel from the arm with the bucket to the excavating mechanism because the leader is detachably connected to the boom via the bracket. Can be. For this reason, it is possible to provide a pile driving device that can be easily assembled and manufactured at low cost.
[0012]
Further, as described above, since the leader is supported only by the bracket provided at the end of the boom and is released from the support by the support arm, the turning radius of the leader can be changed, and therefore, the working radius can be greatly increased. For this reason, according to the pile driving device of the present invention, a drilling operation can be performed efficiently, and the operation time can be reduced. Moreover, unlike the conventional technology, when performing a pile driving work on an inclined land, there is no need to perform the construction work, and the work for leveling the ground can be omitted, so that the work time, labor and construction cost required for the pile driving work are significantly reduced. Can be reduced. Furthermore, since the amount of waste soil discharged due to the construction work is small, environmental destruction around the work site can be minimized, which can contribute to environmental conservation.
[0013]
The pile driving device of the present invention is characterized in that the leader has a built-in hydraulic cylinder, and the lower end thereof is freely expandable and contractible.
[0014]
According to the pile driving device of the present invention, even when the pile driving work is performed on the ground with a large step, the length of the leader is adjusted to the length corresponding to the step by operating the hydraulic cylinder. can do. For this reason, not only can the posture of the leader during the excavation work be stably maintained, but also by pulling the auger out of the ground by grounding the lower end of the leader, the lifting reaction force can be eliminated. The whole can be configured to be small and lightweight.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
FIG. 1 is a front view showing a configuration of a pile driving device according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a bracket portion of the pile driving device shown in FIG. 1 viewed from a right side.
[0017]
The pile driving device of the present invention is used as a ground excavator for piercing the ground J at the time of pile driving work, and includes a base machine 1 having a boom 11 and a movable base machine 1 and a tip of the boom 11 via a bracket 2. , An earth auger 4 provided to be able to move up and down along the leader 3, and a valve box 5 for controlling a hydraulic drive unit of the earth auger 4.
[0018]
As shown in FIG. 1, the base machine 1 has an upper revolving unit 13 having a driver's seat 13 a mounted on a crawler-type lower traveling unit 12 moved by a caterpillar. A boom 11 is provided to protrude forward, and in this embodiment, a base machine 1 in which an arm with a bucket is removed from a boom of an existing hydraulic shovel is used.
[0019]
A boom cylinder 11a extends vertically upward from the upper swing body 13, and its tip is rotatably supported by an intermediate portion of the boom 11 by a pin 14. The boom cylinder 11a expands and contracts to move the boom 11 up and down. ing. An arm cylinder 11b extends obliquely upward from the middle of the boom 11 toward the tip.
[0020]
The bracket 2 includes a base 21 having a storage space 21a opened on one side, cylinders 22a and 22b arranged on both sides of the base 21 so as to sandwich the base 21, and protrudingly provided on both side surfaces of the base 21 to form cylinders 22a and 22b. The support arm 23a, 23b is rotatably connected to one end of the rod, and the support arm 24 is rotatably connected to the other end of each of the cylinders 22a, 22b. Inside the storage space 21a of the base 21, the end portions of the arm cylinder 11b and the boom 11 are arranged at predetermined intervals, and are rotatably and removably mounted on the base 21 by pins 25a and 25b, respectively. Supported.
[0021]
The leader 3 is formed by connecting a plurality of guide members 31a to 31d having a predetermined length dimension in the longitudinal direction, and one guide member 31a disposed at an intermediate portion thereof includes the base 21 of the bracket 2 and the support member 31a. It is integrally connected to the intermediate portion of the arm 24 by connecting means such as welding. In this embodiment, each of the guide members 31a to 31c is formed by welding a strong round pipe to four corners of a box-shaped steel pipe having a length of about 4 m, and connecting the guide members 31a to 31d with each other. Uses a pin joint to facilitate disassembly and assembly. Note that the number of guide members 31a to 31d constituting the leader 3 is not limited to the illustrated number, and it is needless to say that the number can be arbitrarily changed.
[0022]
As shown in FIG. 1, a hydraulic cylinder 33 is built in at the lower end side of the leader 3, and by operating this hydraulic cylinder 33, the guide member 31 d at the lower end side of the leader 3 expands and contracts in the vertical direction, 3 can be freely adjusted in length. Further, a reaction force plate 32 for stably setting the reader 3 is provided at the distal end of the guide member 31d.
[0023]
Further, as shown in FIG. 1, a winch unit 34 including two winches 34a and 34b is provided above the bracket 2 at an intermediate portion of the leader 3, and a plurality of pulleys (shown in FIG. (Not shown) are provided. Wires 36a and 36b are respectively fed from the winches 34a and 34b, and are guided to the head member 35 at the top of the leader 3 via guide pulleys 37a and 37b.
[0024]
The earth auger 4 includes an auger output device 41, an auger screw 42 to which a rotational force is applied by the auger output device 41, and a steady rest 43 for preventing the auger screw 42 from swinging during rotation.
[0025]
Each of the auger output device 41 and the steady rest 43 is provided with a sliding piece 41a and a sliding piece 43a for sandwiching the guide member 31 of the leader 3, whereby the auger output device 41 and the steady rest 43 are It moves up and down along the leader 3. The guide pulley 37b on which the wires 36a and 36b are hooked is connected to the upper part of the auger output device 41. When the earth auger 4 is pulled up along the leader 3, the winch unit 34 is driven to wind the wires 36a and 36b. Can be done by taking. In this embodiment, two sets of sliding pieces 41a are provided in the auger output device 41, but the number of sets is not limited to this, and may be more or less.
[0026]
In the pile driving device of the present invention, the hydraulic drive units such as the cylinders 22a and 22b of the bracket 2, the hydraulic cylinder 33 and the winches 34a and 34b of the leader 3, and the auger output device 41 of the earth auger 4 are controlled. Valve box 5 is not provided at all in base machine 1, but is provided entirely on leader 3 side, specifically between bracket 2 and winch unit 34. A hydraulic pump (not shown) for supplying pressure oil to the valve box 5 is provided on the upper revolving unit 13 of the base machine 1. A hydraulic hose (not shown) extending from the hydraulic pump is connected to the valve box 5. Accordingly, each of the hydraulic drive units is driven. The opening and closing of each valve in the valve box 5 is controlled by operating a lever provided in the driver's seat 13a.
[0027]
As described above, the hydraulic drive units necessary for excavation, such as the winches 34a and 34b and the auger output device 41 of the earth auger 4, and the valve box 5 for controlling these hydraulic drive units are all provided in the reader 3. The leader 3 is detachably connected to the boom 11 via the bracket 2. Therefore, the front attachment of the existing power shovel can be used as an excavator simply by replacing the arm with the bucket with the excavating mechanism and connecting the hydraulic hose extending from the boom 11 to the valve box 5. Therefore, according to the pile driving device of the present invention, assembling becomes easier and the manufacturing cost can be reduced as compared with the conventional technology.
[0028]
Moreover, unlike the technique disclosed in Patent Document 1, the leader 3 is supported only by the bracket 2 provided at the tip of the boom 11 and is released from being supported by the support arm, so that the turning radius of the leader 3 can be changed, Therefore, the working radius can be greatly increased. For this reason, according to the pile driving device of the present invention, the drilling operation can be performed efficiently, and the operation time can be reduced.
[0029]
FIGS. 3 and 4 are views showing a state where the pile driving device shown in FIG. 1 is used on an inclined ground J.
[0030]
As described above, the leader 3 is integrally connected to the bracket 2, and the bracket 2 is rotatably supported at two positions of the arm cylinder 11b and the tip of the boom 11, so that it is shown in FIG. Thus, the leader 3 can be swung in the front-back direction. Moreover, the bracket 2 is connected to the boom 11 so as to be swingable in the left and right directions as shown in FIGS. 2B and 2C by the functions of the cylinders 22a and 22b arranged on both sides of the base 21. Therefore, the leader 3 can be swung not only in the front-back direction but also in the left-right direction.
[0031]
Accordingly, as shown in FIG. 3, the base machine 1 is stopped so that the direction of the traveling direction of the lower traveling body 12 coincides with the inclination direction of the inclined surface in the middle of the inclined surface, and excavation is performed on the flat ground J. To perform the work, the arm cylinder 11b is extended forward and the bracket 2 and the leader 3 are rotated forward, so that the leader 3 can be held vertically. Further, as shown in FIG. 4, the base machine 1 is stopped so that the direction of the traveling direction of the lower traveling body 12 is perpendicular to the inclination direction of the inclined surface in the middle of the inclined surface, and is perpendicular to the inclined ground J. To make a hole, as shown in FIG. 2 (c), the amount of protrusion of the cylinder 22b may be made larger than the amount of protrusion of the cylinder 22a, and the bracket 2 and the leader 3 may be rotated clockwise.
[0032]
Thus, unlike the case of using the conventional pile driving device, even when the pile driving work is performed on the sloped land as shown in FIGS. 3 and 4, there is no need to perform the construction work, and the ground is leveled flat. Since the labor can be saved, the operation time, labor, and construction cost required for the pile driving operation can be significantly reduced. In addition, since the amount of waste soil discharged due to the construction work is small, environmental destruction around the work site can be minimized, which can contribute to environmental conservation.
[0033]
FIG. 5 is a front view showing a state where the pile driving device shown in FIG. 1 is used on the ground J having a large step.
[0034]
As described above, the leader 3 can extend and contract the guide member 31 at the lower end in the vertical direction by the function of the hydraulic cylinder 33 incorporated at the lower end. Therefore, as shown in FIG. 5, even when the pile driving work is performed on the ground J having a large step, by operating the hydraulic cylinder 33, the length of the leader 3 is adjusted to the length corresponding to the step D. Can be adjusted. For this reason, not only can the posture of the leader 3 during the excavation work be stably maintained, but also the lifting reaction force when the auger screw 42 is pulled out from the ground is eliminated by grounding the reaction force plate 32 at the lower end of the leader 3. As a result, the entire device can be configured to be small and lightweight.
[0035]
Next, a method of assembling the pile driving device of the present invention will be described.
[0036]
FIGS. 6A to 8B are front views illustrating an assembly process of the pile driving device shown in FIG. In the figure, the same components as those shown in FIG. 1 are denoted by the same reference numerals.
[0037]
FIG. 6A shows a state before remodeling of a hydraulic shovel serving as the base machine 1. First, the arm 15 is removed from the boom 11 of the hydraulic excavator shown in FIG. 6A, and as shown in FIG. 6B, the bracket 2 to which the guide member 31a is integrally connected is placed horizontally on the ground. In this state, the base machine 1 supports the boom 11 and the arm cylinder 11b at two places. Next, as shown in FIG. 6C, another guide member 31b provided with the head member 35 is connected to one end of the guide member 31a by a pin joint, and thereafter, as shown in FIG. As shown, the wires 36a and 36b are laid between the winch unit 34 provided on the guide member 31a and the head member 35 provided on the guide member 31b.
[0038]
Next, as shown in FIG. 7A, the boom 11 and the arm cylinder 11b of the base machine 1 are operated to rotate the bracket 2 rearward, and the guide member 31a and the guide member 31 shown in FIG. The conjugate of 31b is held vertically. Then, as shown in FIG. 7B, another guide member 31c is connected to the other end of the guide member 31a by a pin joint.
[0039]
Finally, as shown in FIG. 8A, a guide pulley 37b is attached to the auger output device 41, and a sliding piece 41a is fitted from the lower end of the guide member 31c, and the winch unit 34 is driven to drive the wire 36a. , 36b and the auger output device 41 is pulled up to the position shown in FIG.
[0040]
As shown in FIG. 8B, an auger screw 42 is mounted on the raised auger output device 41, and a guide member 31d anti-sway 43 is mounted to prevent the auger screw 42 from swinging, and the earth auger 4 is assembled. .
[0041]
As described above, in the pile driving device of the present invention, the method in which the guide member 31b provided with the heavy head member 35 is horizontally connected to the guide member 31a in FIG. 6C is employed. Thus, assembling becomes easier than in the prior art.
[0042]
The present invention is not limited to the above embodiment, and can be variously modified without departing from the gist thereof.
[0043]
For example, in this embodiment, in the base machine 1, the lower traveling body 12 is a crawler type, but may be a wheel type or a track type. Although omitted in this embodiment, a discharge plate used for leveling the construction base surface and securing ground reaction force may be provided at the rear end of the lower traveling body 12, An outrigger may be provided at the front end of the body 13. By securing a sufficient ground reaction force using such an earth removal plate and an outrigger, it is possible to improve the stability of the machine overturning.
[0044]
Although not shown, the pile driving device of the present invention can be used also as a pile driving machine by mounting a pile driving mechanism such as a hydraulic jack that plays a role of applying a pressure input to the pile to the leader 3. it can.
[0045]
【The invention's effect】
According to the pile driving device of the present invention, all of the hydraulic drive units required for excavation such as an earth auger and a valve box for controlling these hydraulic drive units are provided on the reader side instead of the base machine. Since the leader is detachably connected to the boom via the bracket, it can be used as an excavator simply by exchanging the front attachment of the existing power shovel from the bucket to the excavating means. For this reason, it is possible to provide a pile driving device that can be easily assembled and manufactured at low cost.
[0046]
Further, according to the pile driving device of the present invention, the leader is supported only by the bracket provided at the tip of the boom, and is released from being supported by the support arm, so that the turning radius of the leader can be changed, and therefore, the working radius can be greatly increased. Can be expanded to Therefore, the drilling operation can be performed efficiently, and the operation time can be reduced. Moreover, unlike the conventional technology, when performing a pile driving work on an inclined land, there is no need to perform the construction work, and the work for leveling the ground can be omitted, so that the work time, labor and construction cost required for the pile driving work are significantly reduced. Can be reduced.
[0047]
Further, according to the pile driving device of the present invention, since the amount of waste soil discharged due to the construction work is extremely small, the environmental destruction around the work site can be minimized, and it can contribute to environmental conservation.
[Brief description of the drawings]
FIG. 1 is a front view showing a configuration of a pile driving device according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a bracket portion shown in FIG. 1 as viewed from a right side surface.
FIG. 3 is a front view showing a state where the pile driving device shown in FIG. 1 is used on an inclined ground.
FIG. 4 is a side view showing a state in which the pile driving device shown in FIG. 1 is used on an inclined ground.
FIG. 5 is a front view showing a state where the pile driving device shown in FIG. 1 is used on a ground having a large step.
6 (a) to 6 (d) are front views illustrating an assembly process of the pile driving device shown in FIG. 1.
FIGS. 7A and 7B are front views illustrating the next step of FIG.
FIGS. 8A and 8B are front views illustrating the next step of FIG.
[Explanation of symbols]
Reference Signs List 1 base machine 11 boom 11a boom cylinder 11b arm cylinder 12 lower traveling body 13 upper revolving body 13a driver's seat 14 pin 15 arm 2 bracket 21a storage space 21 base bodies 22a and 22b cylinders 23a and 23b support arm 24 support arm 25a and 25b pin 3 Leader 31a, 31b, 31c Guide member 32 Reaction plate 33 Hydraulic cylinder 34 Winch unit 34a, 34b Winch 35 Head member 36a, 36b Wire 37a, 37b Guide pulley 4 Earth auger 41 Auger output device 41a Sliding piece 42 Auger screw 43 Steady rest 43a Sliding piece 5 Valve box J Ground D Step size

Claims (2)

A freely movable base machine with a boom,
A bracket detachably provided at a tip of the boom of the base machine,
A leader connected to the boom of the base machine via the bracket and having a reaction plate at a tip thereof;
An earth auger provided to be able to move up and down along the leader,
A valve box is provided in the reader and controls a hydraulic drive unit such as the earth auger.
The pile driving device, wherein the bracket is swingably supported in the front-rear direction and the left-right direction with respect to the boom. The pile driving device according to claim 1, wherein the leader has a built-in hydraulic cylinder, and a lower end of the leader expands and contracts freely in a vertical direction.

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