JPH0612040Y2 - Stake driver - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a pile driving ship for driving a pile such as a sand pile on the seabed in the work of improving soft ground.

[Conventional technology]

Generally, in a pile driving ship such as a soft ground improvement work ship, as shown in FIG. 3, a plurality of pile supporting leaders 7 are erected at the lower end of the hull 1 with pins 16 pivotally attached at their lower ends. These leaders 7 are fixedly supported on the hull 1 by the shards 2 and the stern stays 3 arranged on both the left and right sides of the hull 1.

Then, the shard 2 is pivotally attached to the leader 7 via a head 6 horizontally arranged at the upper end thereof and a holding member 13 attached to the leader 7 so as to engage with the head 6 and at the lower end thereof. Is pivotally attached to the deck of the hull 1 by pins 15. Further, the shard stay 3 is pivotally attached to the shard 2 at its upper end and to the ledge 2 of the hull 1 by a pin 14 so as to support the shard 2. Further, the shard 2 and the shard stay 3 are connected and fixed to each other by connecting members 4 and 5.

On the other hand, the casing pipe 8 as a pile is supported by a pile guide mechanism (not shown) so as to be vertically movable along the leader 7, and the upper end thereof has a vibrator for driving the casing pipe 8 into the seabed soil. One end of the wire rope 11 is connected via 9. This wire rope 11
Is connected to a winch 12 via a pulley 10 attached to the upper end of the leader 7, and is taken up or unwound by the winch 12. That is, the casing pipe 8 is suspended by the wire rope 11,
By the winding / unwinding operation of the wire rope 11 by the winch 12, it moves up and down along the leader 7.

By the way, when the casing pipe 8 is in a suspended state and the lower end of the casing pipe 8 does not penetrate into the seabed soil, the relative position of the water surface with respect to the hull 1 is shown by a solid line W in FIG.
In the state indicated by L, when the lower end of the casing pipe 8 penetrates into the seabed soil and the weight of the casing pipe 8 no longer acts on the pulley 10 at the upper end of the leader 7, the hull 1
The end portion on the side of the leader 7 of the above floats, and the relative position of the water surface with respect to the hull 1 changes to the trim state shown by the chain line WL '.

Due to such a trim change of the hull 1, the posture of the leader 7 fixed on the hull 1 is changed, and the casing pipe 8 guided by the leader 7 also maintains the initial posture in which it vertically penetrates into the seabed soil. Can not be.

Therefore, conventionally, as shown in FIGS. 3 and 4, ballast tanks 17 and 18 are provided at both ends of the hull 1, and water ballasts in the ballast tanks 17 and 18 are pumped by a motor 2 driven by a motor 2.
By using 0 to move through pipe 21,
The trim change of the hull 1 is prevented.

That is, when the casing pipe 8 is attached to the leader 7, the ballast tank 17 on the leader 7 side of the hull 1 is emptied so that the hull 1 does not undergo trim change due to the weight of the casing pipe 8 and Water ballast is poured into the ballast tank 18 at the end, and the hull 1 is held so as to be horizontal.

On the other hand, when the casing pipe 8 penetrates into the seabed soil, the weight of the casing pipe 8 does not act on the hull 1. Therefore, a water ballast corresponding to the weight change is moved from the ballast tank 18 to the ballast tank 17, The horizontal state of the hull 1 is maintained.

[Problems to be solved by the invention]

However, in the conventional pile driving ship as described above, the hull 1
Ballast tanks 17,18 to prevent trim changes
Hundreds of tons of water ballast must be moved in a short period of time, requiring an extremely large capacity motor 19 and pump 20.

Further, such a motor 19 and pump 20 are considerably large in size, and the ballast tanks 17 and 18 occupy a lot of space in the hull 1 together with the motor 19 and the pump 20, and also maintain the ballast tanks 17 and 18. In order to do this, it is necessary to take work such as the paint inside the tank.

Therefore, it is possible to pivot one end of the leader and drive the other end with a hydraulic cylinder to control the posture of the leader, but a complicated hydraulic circuit is necessary for accurate control of the leader posture by the hydraulic cylinder. There is a problem that

The present invention is intended to solve these problems, and the posture of the leader guiding the pile can be adjusted by a pair of winches through each wire rope.
Even if the trim of the hull changes during the driving of the pile, the posture of the pile can be easily fixed to the seabed without using a ballast tank, a large-capacity motor or pump, or requiring a complicated hydraulic circuit. It is intended to provide a pile driven ship that can be held.

[Means for solving problems]

Therefore, the pile driving ship of the present invention is provided with a pile support leader which is erected vertically at the lower end of the hull and a pile guide mechanism for guiding the pile along the leader. A leader support member for preventing tilting is erected on the ship, and in order to adjust the relative attitude of the leader with respect to the hull, a leader drive mechanism is interposed between the leader and the leader support member, A leader posture detection sensor capable of detecting the posture of the leader, and a leader posture controller for transmitting a control signal to the leader drive mechanism based on a detection signal from the sensor are provided, and the leader support member is provided in the lateral direction of the hull as the leader support member. A pair of arms that project from the provided umbrella tree so as to extend to both sides of the leader, a groove formed on the surface of the arm tree that faces the leader, and a groove that engages with the groove. As described above, the leader tilt guide mechanism is configured by the protrusions provided on both sides of the leader, and the leader drive mechanism includes the first pulley provided at each tip of the pair of arms and the First above on Kasagi
A second pulley provided to correspond to the pulley of the above, a third pulley provided to the above-mentioned tree in the middle of the second pulley, and one end of each of the both sides of the leader is locked. The first wire rope whose other end is wound around the first winch via the first and second pulleys, and one end of which is locked to the face of the leader facing the headstock, and the third wire And a second wire rope wound around a second winch at the other end via the pulley of the above, and the control signal is transmitted to each drive motor of the first and second winches. It is characterized by being configured as.

[Action]

In the pile driving ship of the present invention described above, the posture of the pile supporting leader is detected by the leader posture detection sensor, and based on the detection signal from the sensor, the leader posture controller drives each pair of winches in the leader drive mechanism. A control signal is transmitted to the motor, and the leader driving mechanism operates according to the control signal, whereby the relative posture of the pile supporting leader with respect to the hull is adjusted.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.
1 and 2 show a pile driving ship as an embodiment of the present invention. FIG. 1 is an enlarged perspective view showing a main part thereof, and FIG. 2 is a schematic view showing a leader driving mechanism thereof. is there.

The pile driving ship as one embodiment of the present invention is constructed in substantially the same manner as the conventional pile driving ship shown in FIG. 3, but in the embodiment of the present invention, as shown in FIG. Instead of (see FIG. 3), a pair of armrests extends from both sides of the pile supporting leader 7 from the head tree 6 as a leader supporting member arranged on the top of the chaise 2 (see FIG. 3). 23,23
Are formed so as to project, and grooves 24, 24 are respectively formed on the surfaces of the same arms 23, 23 with respect to the leader 7. And
The grooves 24, 24 are the protrusions 25 provided on both sides of the leader 7,
Engage with each of the 25 to guide the leader 7 to tilt about a pin 16 (see FIG. 3). In this way, the arms 23, 23, the grooves 24, 24, and the protrusions 25, 25 constitute a leader tilt guide mechanism.

Further, a leader driving mechanism M is interposed between the headboard 6 and the leader 7, and the leader driving mechanism M includes eye plates 28a, 31, pulleys 29, 30, 32, wire ropes 33, 34 ,. It is composed of winches 38 and 40 and motors 39 and 43.

That is, the first pulleys 29, 29 are installed on the top surfaces of the ends of the arms 23, 23, respectively, and the second pulleys 30, 30 are installed on the top surface of the umbrella tree 6 corresponding to the pulleys 29, 29. A third pulley 32 is also installed on the headboard 6 in the middle of the second pulleys 30, 30. Further, the first eye plates 28a, 28a are provided on both sides of the leader 7, respectively, and the second eye plate 31 is provided on the surface of the leader 7 facing the umbrella tree 6, one end of each of which is provided. The first wire ropes 33, 33 locked to the first eye plates 28a, 28a have the first pulleys 29,29 and the second pulleys 30,3.
It is arranged so that the other end is wound around the first winch 38 via 0. The other ends of the two first wire ropes 33, 33 become one under the pulleys 30, 30 and are wound around the first winch 38.

On the other hand, the second eye plate 31 has one end locked to the second eye plate 31.
Of the wire rope 34 is disposed so that the other end thereof can be wound around the second winch 40 via the third pulley 32. The first and second winches 38 and 40 are driven by the first and second motors 43 and 39, respectively.

Further, as shown in FIG. 1, a reader posture detection sensor 35 is attached to the reader 7, and the sensor 3
As shown in FIG. 2, the detection signal from 5 is sent to the reader attitude controller 36 installed in the hull 1.

Then, based on the detection signal from the leader posture detection sensor 35, the leader posture controller 36 sends a control signal to the motors 43, 39 in the leader driving mechanism M, and the winches 38, 39 are operated by the operation of these motors 43, 39. 40 is driven to wind the first and second wire ropes 33, 34
Perform feeding. That is, the first winch 38
2nd winch 40
When the leader 7 tilts to the right in FIG. 1 by feeding out the second wire rope 34 by, the first winch 38 feeds out the first wire rope 33 and the second winch 40 pulls out the second wire rope 34. Wire rope 3
By winding 4 in, the leader 7 tilts to the left in FIG.

Since the pile driving ship as one embodiment of the present invention is constructed as described above, when the casing pipe 8 (see FIG. 3) as a pile penetrates into the seabed soil, the casing pipe 8
The weight of (1) acts on the pulley 10 (see FIG. 3) before it penetrates into the seabed soil, and after it penetrates, it does not act on the pulley 10 and the hull 1 undergoes a trim change.

In the pile driving ship of the present invention, even if a trim change occurs in the hull 1,
In order to keep the posture of the casing pipe 8 constant with respect to the water surface indicated by the solid line WL in FIG. 3, that is, to keep the angle between the casing pipe 8 and the solid line WL constant, the trim change occurs in the hull 1, and the leader changes. When the posture of 7 changes, the posture change sensor 35 attached to the reader 7 detects the change in posture, and the detection signal is sent to the leader posture controller 36. In this leader attitude controller 36, in order to eliminate the change in the attitude of the leader 7 and to tilt the leader 7 with respect to the hull 1 so that the angle of the leader 7 with respect to the water surface becomes constant, the detection signal of the sensor 35 is detected. A control signal is sent to each motor 43, 39 of the reader driving mechanism M based on

Then, the motors 43 and 39 operate according to the control signal to drive the corresponding winches 38 and 40, and the wire rope 3
Through 3, 34, the leader 7 is tilted with respect to the hull 1 around the pin 16 so that its angle to the water surface is constant.

In this way, by tilting the leader 7 according to the control signal and changing the angle with respect to the hull 1, the angle of the leader 7 with respect to the water surface is always kept constant, whereby the leader 7 is guided by the pile guide mechanism (not shown). The casing pipe 8 arranged along the line is always kept at a constant angle with respect to the water surface.

According to the above-mentioned pile driving ship, a leader having an extremely simple structure using wire ropes and winches, as compared with the conventional leader posture adjusting means using a large-scale ballast tank (see symbols 17 and 18 in FIGS. 3 and 4). By using the drive mechanism M, the posture of the leader 7 can be easily controlled in a short time, and even when the casing pipe 8 penetrates into the seabed soil, a sudden trim change of the hull 1 may occur. The posture of the leader 7 can be adjusted so that the angle of the casing pipe 8 with respect to the surface of the water can be kept constant.

Further, in the attitude adjusting means of the leader 7 in the present invention, the pair of winches 38, 40 and the respective wire ropes 33, 34
Since the posture is adjusted by tilting the leader 7 with respect to the hull 1 using, the driving force required for this posture adjustment may be small, and the structure of the pile driving ship itself is simpler than that of the conventional one. can do.

Then, when the leader 7 is tilted, the pair of arms 23 projecting from the umbrella 6 holds the leader,
Since the groove 24 formed in the arm bar 23 and the protrusion 25 with the leader engaging with the groove 24 guide the tilting of the leader, the tilting of the leader 7 can be accurately performed while suppressing the rolling of the leader 7. It has the effect of giving guidance.

[Effect of device]

As described in detail above, according to the pile driving ship of the present invention, the following effects can be obtained.

(1) The posture of the leader is extremely adjusted by winding and unwinding the wire rope with a winch so that the pile can always be driven into the soil at a constant angle even if the trimming of the hull occurs during pile driving. Since it can be done easily and quickly, the piles can be reliably placed in the soil.

(2) Since the device for adjusting the posture of the leader is composed of wire ropes, pulleys and winches extremely simply as compared with the conventional posture adjusting means using a ballast tank, hydraulic cylinder, etc. The required space on the hull is reduced, and a complicated hydraulic circuit is not required, so that the device can be easily maintained.

(3) When the leader 7 is tilted, the pair of arms 23 and 23 protruding from the head tree 6 serving as the leader support member holds the leader 7 while holding the groove 2 formed in the armor 23.
4 and the leader-attached protrusion 25 that engages with the groove 24, the leader tilting guide action is performed.
The tilt guide of the leader 7 can be accurately performed while suppressing the rolling of the leader.

(4) Based on the detection signal of the leader posture detection sensor 35, the leader posture controller 36 can accurately adjust the winding / unwinding amount of the wire ropes 33, 34 in the winches 38, 40. Control is properly performed.

(5) A first pulley 29 is provided at each end of the pair of arms 23, 23 to guide the first wire rope 33, one end of which is locked to both sides of the leader 7, and the pulleys are also provided. Corresponding to 29, a pair of second pulleys 30, 3 on the head board 6
In order to guide the second wire rope 34, which is provided with 0 and whose one end is locked to the surface of the leader 7 facing the headstock 6, the headstock 6 is provided in the middle of the pair of second pulleys 30, 30. Since the third pulley 32 is provided in, the transmission of the driving force to the leader 7 can be appropriately performed without deviation.

[Brief description of drawings]

1 and 2 show a pile driving ship as an embodiment of the present invention. FIG. 1 is an enlarged perspective view of a main part thereof, and FIG. 2 is a schematic view showing a leader driving mechanism thereof. Yes, FIGS. 3 and 4 show a conventional pile driving ship, FIG. 3 is a side view thereof, and FIG. 4 is a schematic view showing its attitude adjusting means. 1 ... Hull, 2 ... Chass, 6 ... Kasaki as leader support member, 7 ... Pile support leader, 8 ... Casing pipe as pile, 10 ... Pulley, 16 ... Pin,
23 ... arms, 24 ... grooves, 25 ... projections, 26 ...
Hydraulic cylinder, 28a ... Eye plate, 29,30 ... Pulley, 31 ... Eye plate, 32 ... Pulley, 33,34 ...
Wire rope, 35 ... Leader posture detection sensor,
36 ... Leader attitude controller, 37 ... Motor, 38 ...
... winches, 39 ... motors, 40 ... winches, 43
...... Motor, M …… Leader drive mechanism.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-53-78606 (JP, A) Actually open 60-36425 (JP, U) Actually open 57-38833 (JP, U) Actually open 60- 91622 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A pile-supporting leader, the lower end of which is pivotally attached to the end of the hull and which is erected, and a pile guide mechanism for guiding the pile along the leader to prevent the leader from collapsing. A leader support member is erected on the ship, and a leader drive mechanism is interposed between the leader and the leader support member to adjust the relative posture of the leader with respect to the hull, and the posture of the leader is adjusted. A leader attitude detection sensor that can be detected, and a leader attitude controller that sends a control signal to the leader drive mechanism based on a detection signal from the sensor are provided. A pair of arms that project so as to extend to both sides of the leader, a groove formed on a surface of the arm tree that faces the leader, and an upper portion that engages with the groove. A leader tilt guide mechanism is formed by the protrusions provided on both sides of the leader, and the leader drive mechanism includes a first pulley provided at each tip of the pair of arms and a first pulley provided on the headboard. A second pulley provided corresponding to the first pulley, a third pulley provided on the above-mentioned kasaki in the middle of the second pulley, and one end of each of the both sides of the leader is locked. A first wire rope whose other end is wound around a first winch via the first and second pulleys, and one end of which is locked to a surface of the leader facing the headstock, And a second wire rope wound around a second winch at the other end via the pulley of No. 3, and the control signal is transmitted to each drive motor of the first and second winches. It is configured to be That, pile ship.