JP2000212960A - Pile bearing structure of three point bearing pile driver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply carry out work for holding and releasing a driving pile within a short period of time and, at the same time, to enable the driving pile to hold in a good state even in the case an inclined pile is driven in the ground, on the sea and harbors. SOLUTION: A pair of openable bearing arms 22 and 22 holding a driving pile 9, four guide rollers 23a holding the driving pile 9 in a closing state of the bearing arms 22 and 22 and a lock device 24 holding and releasing a closing state of the bearing arms 22 and 22 are provided to a lower pile keeper 8. Function of a working bench is provided to an upper pile keeper 7. A parallel link mechanism 16 is connected to the upper pile keeper 7 to make it possible to maintain the upper pile keeper 7 in a horizontal state even when a leader 4 is raised and lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-point support type pile driving machine that supports a leader with a leader bracket and a pair of left and right back stays at the front of a base machine. The present invention relates to a pile support structure of a three-point support type pile driver suitable for driving a slanted pile of a length.

[0002]

2. Description of the Related Art As a conventional three-point support type pile driver, for example, there is one disclosed in Japanese Utility Model Registration No. 25661559. This pile driver has an upper pile keeper and a lower pile keeper for holding a driving pile on the upper and lower sides of a leader erected at the front of the base machine, and the lower pile keeper is supported at a base end on the base machine side. By reducing the diameter of a pair of substantially arcuate support arms that expand and contract to a ring shape,
It is designed to hold the driving pile. At the tip of each support arm, a vertical pin hole is drilled, and when both support arms are driven and the pile is wrapped as described above, they are locked to the pin holes that overlap vertically at the support arm tip. A pin is inserted to keep the diameter of the support arm reduced.

[0003]

However, the above-described insertion and removal of the lock pin is a manual operation that is performed by the worker climbing the lower pile keeper each time, and is time-consuming and troublesome. In particular, when a long driving pile is installed diagonally on the ground, at sea, or in a harbor, etc., the leader and the upper and lower pile keepers are inclined integrally with the driving pile,
There are problems that it becomes difficult for an operator to climb on the pile keeper to perform work, and that the pile keeper is loaded with an inclined driving pile, thereby impairing the durability of the pile keeper.

[0004] Therefore, the present invention provides a simple and quick operation for holding and releasing a driving pile, and also favorably holding a driving pile when driving an oblique pile on the ground, at sea, in a port or the like. It is an object of the present invention to provide a pile support structure of a three-point support type pile driver that can be used.

[0005]

According to the present invention, in accordance with the above-mentioned object, an upper portion of a reader is supported by a pair of left and right back stays, and a lower portion of the reader is supported by a reader bracket,
A pile support structure of a three-point support type pile driver having an upper pile keeper and a lower pile keeper for holding a driving pile at the upper and lower portions of the leader, wherein one or both of the upper pile keeper and the lower pile keeper are the A pair of openable and closable support arms for holding the driving pile, a plurality of guide rollers for holding the driving pile in a closed state of the support arm, and locking means for holding and releasing the closed state of the support arm. ing.

The above-mentioned locking means includes a pin hole drilled at the tip of each support arm and superimposed when both support arms are closed, a lock pin engaged with the pin holes,
An operation mechanism for engaging and disengaging the lock pin with the pin hole may be provided.

In addition, a work table is provided on the above-mentioned leader, and the work table and the pile driver are connected by a parallel link mechanism so that the horizontal state of the work table is maintained by the parallel link mechanism while the leader is undulating. Alternatively, the work table may be used as one or both of the upper pile keeper and the lower pile keeper.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 is a front view of a lower pile keeper, FIG. 2 is a side view of a three-point support type pile driver, FIG. 3 is a plan view of a lower pile keeper, FIG. 4 is a side view of an upper pile keeper, and FIG. FIG.

A three-point support type pile driver 1 comprises a leader 4 erected at the front of a self-propelled base machine 3 having a crawler 2.
The upper part is supported by a pair of left and right back stays 5 and 5, the lower part is supported by a leader bracket 6 at the front of the base machine 3, and the upper and lower pile keeper 7 and lower pile keeper 8 A long driving pile 9 is held by the pile keepers 7 and 8 with the upper part inclined backward. Vibro hammer 1 at the upper end of driving pile 9
The vibratory hammer 10 is vibrated to strike the driving pile 9 obliquely on the ground, at sea, or in a harbor.

The upper pile keeper 7 has a bifurcated frame 11 surrounding the latter half of the driving pile 9 at the front of the leader 4, and the front half of the driving pile 9 is openable and closable continuously at the left and right front parts of the frame 11. And a substantially semicircular support arm 12, 12 enclosing the same. Roller units 13 and 13 are provided on the upper surface of the frame 11 so as to be inclined upward toward the center of a through hole 18 to be described later, and guide rollers 13a are supported at the tips of the roller units 13 and 13, respectively. The upper pile keeper 7 serves as a work table for maintenance of the leader 4 and the vibratory hammer 10 in addition to welding work for connecting the driving pile 9 to a long length, and a frame 11 and a support arm serving as a floor of the work table. Handrails 14 are provided around 12, 12 and a step 15 for raising and lowering is provided between the frame 11 and the base machine 3, and a parallel link mechanism is provided between the upper part of the reader 4 and the leader bracket 6. 16 are provided.

Each support arm 12 of the upper pile keeper 7
The upper and lower portions of the support arms 12 are pivotally supported by the front end of the frame 11 by a support shaft 17, and the opening and closing brackets 11a provided on the frame 11 and the support arm 12 are pinned. When the ends of the support arms 12 and 12 are closed, the diameter of the pile 11 is larger than that of the driving pile 9 inside the frame 11 and the support arms 12 and 12. Through hole 1
8 are defined, and two lower left and right (leader 4 side) positions of the driving pile 9 inserted into the through holes 18 are connected to the guide rollers 13.
a, driving pile 9 inclined to leader 4 side, supported by 13a
To receive the upper load.

Guide roller 13 of upper pile keeper 7
a and 13a are supported in the direction perpendicular to the axis of the driving pile 9 at the tips of the roller units 13 and 13 provided on the upper surface of the frame 11 as described above. 13, 13 can reliably support the driving pile 9 inclined toward the leader 4 side.
The parallel link mechanism 16 is provided between the reader 4 and the reader bracket 6 and the frame 11 of the upper pile keeper 7.
And a vertical link 20 connecting the leader bracket 6 and the horizontal link 19 at the rear side of the leader 4 in a substantially parallelogram shape, and turning around the upper and lower support shafts A and B. When the leader 4 changes the undulation angle, the parallel link mechanism 16 is turned around the support shafts A and B to support the frame 11 of the upper pile keeper 7 serving as the floor of the work table. The arms 12 and 12 can always be kept horizontal.

The lower pile keeper 8 is a bifurcated frame 2 surrounding the latter half of the driving pile 9 at the front lower end of the leader 4.
1 and the driving pile 9 continuously at the left and right front portions of the frame 21.
A substantially L-shaped support arm 22 for freely opening and closing the first half of
22, four guide rollers 23a arranged at equal intervals of 90 degrees on the upper surfaces of the frame 21, the support arms 22, 22, and a lock means 24 for holding and releasing the closed state of the two support arms 22, 22; It has.

The frame 21 of the lower pile keeper 8 and the support arms 22, 22 are connected to the frame 1 of the upper pile keeper 7.
1 and the support arms 12, 12 are provided in a horizontal direction, but are set so as to be orthogonal to the axis of the leader 4 and the driving pile 9, even if the inclination angle of the leader 4 changes. By keeping the orthogonal relationship with the leader 4 and the driving pile 9, the load of the driving pile 9 is always 4
The two guide rollers 23a are tightened so that they can be reliably received.

Each support arm 22 of the lower pile keeper 8
Is pivotally supported at the front end of the frame 21 using a support shaft 25,
It opens and closes to the left and right by the expansion and contraction of a hydraulic cylinder 26 provided between the frame 21. When the ends of the support arms 22 are closed, a polygonal through hole 27 larger than the driving pile 9 is defined inside the frame 21 and the support arms 22, 22.
The outer peripheral surface of the driving pile 9 that is inserted through the guide roller 23a is supported by the above-described guide roller 23a without play. The guide roller 23a is mounted on the upper surface of the frame 21 and the support arms 22 and 22 by bolting the roller unit 23, and is mounted in the through hole 27 toward the center thereof. By changing to the four guide rollers 23a
To accommodate driving piles with different diameters.

The lock means 24 includes support arms 22, 22.
The stopper pieces 22a, 22b, 22b projecting from the tip of the
2a, 22b, 22b, when they come into contact with each other, three pin holes 22c which are vertically overlapped;
c, and an operating mechanism 30 for engaging and disengaging the lock pin 29 with the pin hole 22c.

The operating mechanism 30 includes one support arm 2
Hydraulic cylinder 3 covered with casing 31 on the upper surface of 2
2 and a link mechanism 33, the link mechanism 33 is rotated about a support shaft 34 as a fulcrum by the expansion and contraction of the hydraulic cylinder 32, and the lock pin 29 pivotally attached to one link 33a of the link mechanism 33 is moved to the stopper piece 22a. , 22b, 22b
To be disengaged from the three pin holes 22c,
When the lock pin 29 is engaged with the three pin holes 22c, the closed state of the support arms 22, 22 is maintained, and when the lock pin 29 is disengaged from the pin hole 22c, the closed state of the support arms 22, 22 is maintained. Is released.

A rod 35 is connected to the other link 33b of the link mechanism 33, and a marker 36 at the tip of the rod 35 is moved to the casing 3 with the lock pin 29 being disengaged.
The lock state of the support arms 22, 22 can be easily and visually observed by protruding and retracting from the first holder 31a. The operation of the lock means 24 is performed by remote control from the operator room of the base machine 3 or the like, and the lock pins 29 are engaged with and disengaged from the pin holes 22c to hold or release the closed state of the support arms 22, 22. Is performed.

This embodiment is configured as described above.
When driving an oblique pile on the ground, at sea, or in a harbor, the three-point support type pile driver 1 is driven by a crawler 2 to a work site, and the driving pile 9 is driven into a desired position while being held in an inclined state as shown in the figure. be able to.

The lower pile keeper 8 includes a support arm 2
Since the closed state of the units 2 and 22 can be locked or unlocked in a short time by the lock unit 24, there is no need for the operator to perform work such as climbing the pile keeper as in the related art. In particular, when the long driving pile 9 is driven obliquely on the ground, at sea or in a harbor, the locking means 24 keeps the support arms 22 and 22 in a good closed state and reduces the load of the driving pile 9. Since the four guide rollers 23a are reliably received, the pile keeper 7,
8 does not impair the durability.

Further, in the lower pile keeper 8, the reader 4
When the angle of the driving pile 9 is changed, it operates in accordance with this, and the orthogonal relationship between the axis of the leader 4 and the driving pile 9 and the roller unit 23 is maintained.
Is always tightened by the four guide rollers 23a, and the driving operation can be performed while the driving pile 9 is securely held.

Further, since a work table by the upper pile keeper 7 is provided on the upper portion of the leader 4, welding work for connecting the driving pile 9 to a long length and the like, as well as the leader 4 and the vibratory hammer 1 are provided.
0 maintenance can be performed satisfactorily. Further, in the present embodiment, since the upper pile keeper 7 itself also functions as a work table, the manufacturing cost can be extremely reduced as compared with a case where the work table is separately manufactured. Moreover, even when the leader 4 changes the undulation angle, the horizontal state of the upper pile keeper 7 can be always maintained by the parallel link mechanism 16, so that the function as a work table does not need to be impaired. Since a part of the structure of the parallel link mechanism 16 is also used by the reader 4 and the leader bracket 6, the cost can be further reduced.

Further, a driving pile 9 is attached to the upper pile keeper 7.
By setting the through hole 18 with a diameter larger than that, even if the leader 4 and the driving pile 9 are inclined at a considerable angle with respect to the upper pile keeper 7 which maintains a horizontal state, the upper pile keeper 7 does not interfere. The upper load of the driving pile 9 can be favorably supported by the guide rollers 13a, 13a provided on the frame 11 of the upper pile keeper 7, while allowing the inclination of the leader 4 and the driving pile 9 as described above. it can.

In the above embodiment, the locking means of the support arm is described as being applied only to the lower pile keeper.
The support arm, the plurality of guide rollers, and the locking means can be implemented on one or both of the upper and lower pile keepers. The number of the guide rollers combined with the support arm and the locking means can be appropriately changed according to conditions such as the diameter of the driving pile. Also,
By setting at least the lower pile keeper of the upper pile keeper and the lower pile keeper in an orthogonal relationship with the leader and the driving pile, and setting a plurality of guide rollers on the pile keeper, the outer periphery of the driving pile is always fastened with the plurality of guide rollers, and the driving is performed. The driving work can be performed while securely holding the pile.

The work table set as the reader may be used as one or both of the upper pile keeper and the lower pile keeper, or a work table separate from the pile keeper may be supported by a parallel link mechanism. Can also. When the pile keeper also functions as a work table, the pile keeper may be provided with the support arm of the present invention, a plurality of guide rollers, and a lock unit.

The driving angle and the driving direction of the driving pile held by the pile keeper can be freely adjusted by extending and retracting the back stay of the pile driving machine. Further, the number of the guide rollers attached to the pile keeper also serving as the work table can be appropriately increased or decreased as long as the guide rollers do not hinder the support of the inclined driving pile.

When the pile keeper also serves as a work table and the driving angle of the driving pile is adjusted, the roller unit integrated with the pile keeper (the roller units 13 and 13 of the upper pile keeper 7 in the above embodiment) is mounted. It is preferable that the angle can be automatically or manually changed so as to be orthogonal to the axis of the driving pile according to the change of the inclination angle. Further, the pile keeper of the above embodiment and the work table are provided separately, and the roller unit of the upper pile keeper is
Even if the inclination angle of the leader is changed, the roller unit can be installed even when the inclination angle of the leader is changed by integrally attaching the guide roller of the roller unit to the leader always parallel to the driving pile and setting the guide roller of the roller unit in the direction perpendicular to the axis of the driving pile. Since they are integrated with the leader, the orthogonal relationship between them is maintained, and no unnecessary load is applied to the guide roller from the driving pile.

[0028]

As described above, claim 1 or claim 2
According to the invention, the closed state of the support arm can be locked in a short time or this lock can be easily released, and the trouble of the worker performing the work such as climbing to the pile keeper as in the related art is eliminated. . Particularly, when a long driving pile is installed diagonally on the ground, at sea, or in a harbor, the closed state of the support arm is locked even if the load of the inclined driving pile may be applied to the pile keeper through the guide roller. By this means, the pile keeper can be securely held, and the load of the driving pile is reliably received by the plurality of guide rollers, so that the durability of the pile keeper is not impaired.

According to the third aspect of the present invention, in addition to welding work for connecting the driving pile to a long length, maintenance of the leader and the pile driving apparatus can be performed simply and satisfactorily by using the work table. Become like Furthermore, even when the reader changes the undulation angle, the work table can be always kept horizontal by the parallel link mechanism, and when the reader changes the undulation angle, the work table is almost out of the set working position. Since it is not necessary to move, the function as a work table does not have to be lost. Further, according to the invention of claim 4, since the upper pile keeper or the lower pile keeper also functions as the work table, the work table can be manufactured easily at a very low cost.

[Brief description of the drawings]

FIG. 1 is a front view of a lower pile keeper showing one embodiment of the present invention.

FIG. 2 is a side view of a three-point support type pile driver showing one embodiment of the present invention.

FIG. 3 is a plan view of a lower pile keeper showing one embodiment of the present invention.

FIG. 4 is a side view of an upper pile keeper showing one embodiment of the present invention.

FIG. 5 is a plan view of an upper pile keeper showing one embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Three-point support type pile driving machine, 2 ... Crawler, 3 ... Base machine, 4 ... Leader, 6 ... Leader bracket, 7 ... Upper pile keeper, 8 ... Lower pile keeper, 9 ... Driving pile, 11
... Frame, 12 support arm, 13a guide roller, 16 parallel link mechanism, 18 through hole, 19 horizontal link, 20 vertical link, 21 frame, 22 support arm, 22a, 22b, 22b stopper Piece, 22c ...
Pin hole, 23a guide roller, 24 locking means, 2
6 ... hydraulic cylinder, 27 ... through hole, 29 ... lock pin,
Reference numeral 30: operating mechanism, 32: hydraulic cylinder, 33: link mechanism, A, B: spindles of the parallel link mechanism 16

Claims (4)

[Claims] 1. An upper pile keeper and a lower pile keeper for supporting an upper part of a leader with a pair of left and right back stays, supporting a lower part of the leader with a leader bracket, and holding a driving pile on upper and lower parts of the leader. A pile support structure for a three-point support type pile driver, wherein one or both of the upper pile keeper and the lower pile keeper is a pair of openable and closable support arms for enclosing the driving pile, and A pile support structure for a three-point support type pile driver, comprising: a plurality of guide rollers for holding the driving pile in a closed state; and locking means for holding and releasing the closed state of the support arm. 2. The locking device according to claim 1, wherein the locking means includes a pin hole drilled at a tip of each of the support arms and overlapped in a closed state of the two support arms, a lock pin engaged with the pin holes, and a lock pin. The pile support structure of a three-point support type pile driver according to claim 1, further comprising: an operating mechanism that engages with and disengages from the pin hole. 3. A work table is provided on the leader, the work table and the pile driver are connected to a parallel link mechanism, and the horizontal state of the work table is maintained by the parallel link mechanism while the leader is undulating. The pile support structure of a three-point support type pile driver according to claim 1 or 2, wherein the pile support structure is provided. 4. The pile support structure for a three-point support type pile driver according to claim 3, wherein the work table is used as one or both of the upper pile keeper and the lower pile keeper.