JPS58199285A - Working boat with oblique spud - Google Patents

Abstract

PURPOSE:To dispense with a spud carriage, by providing a drive mechanism for swinging a spud connecting arm for swinging a bendable spund back or forth, so that the drive mechanism is located between a boat the the arm. CONSTITUTION:A bendable spud 11 is attached to a boat 10. The spud 11 is provided with a spud coupling arm 11a whose upper end is pivotally connected to the boat 10 so that the arm can be swung back or forth. The spud body 11b, which can extends obliquely to the sea bottom, is pivotally coupled to the arm 11a. A drive mechanism for swinging the arm 11a is provided between the arm and the boat 10. As a result, the oblique-spud-type working boat 10 can be accurately moved back or forth without providing a spud carriage on the boat.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a spud for mooring a ship to the seabed. Concerning work vessels such as dredgers and rubble leveling vessels.

Conventional pump dredger spud mooring device.

As shown in Figure 1 (longitudinal sectional view) and Figure 2 (plan view), the position of the hull is maintained by driving the spud 1 into the seabed through the spud keeper 2. In this method, the operating limit wave height is extremely low in terms of the strength of the spud 1 and the vibration of the cutter head 3 during waves.

Therefore, we developed a third type of equipment that can operate at even higher wave heights.
As shown in the figure, a method using inclined spuds has been proposed.

In this method, an inclined spud 4 is connected to a spud carriage 6 on the hull via a trunnion 5, an additional weight 7 is provided at the tip of the spud, and the spud 4 is suspended by a wire 9 from a gantry 8 provided on the hull. It has a similar structure.

During dredging operation, by sufficiently increasing the reaction force R that the tip of the spud receives from the sea/bottom and the tension T of the wire, changes in the angle between the hull and the inclined spud are restrained, and the hull is supported by the tip of the spud. The state will be as follows.

By adopting this method, the surging of the hull
(back-and-forth rocking), pitching (pitching), and mbi (bow rocking) are significantly reduced compared to those shown in Figures 1 and 2, and the amount of oscillation of the cutter head is reduced.

Additionally, this slanted spud method is compared to vertical spud or wire mooring methods.

In particular, it has excellent position holding performance in the longitudinal direction, and by using a spud carriage, the hull can be advanced at accurate intervals, improving dredging efficiency.

However, during dredging work, the spud carriage is subjected to forces due to tension fluctuations in the swing wire, tidal currents, waves, etc., so it becomes a complicated device, and it also requires a considerable amount of space to move back and forth on the hull. There is a point. Particularly for small dredgers, it is often necessary to enlarge the hull to accommodate a spud carriage.

The present invention attempts to solve the above-mentioned problems with the inclined spud system, and makes it possible to accurately move the hull in the longitudinal direction without providing a spud carriage on the hull. It is an object of the present invention to provide a tilting spud type work boat.

Equipped with a bendable spud attached to the hull.

The spud is composed of a spud body connecting arm whose upper end is pivotally attached to the ship's hull and can swing back and forth, and a spud body which is pivotally attached to the arm and can extend diagonally to the seabed,
It is characterized in that a drive mechanism for swinging the arm is mounted between the arm and the hull.

Below, a tilted spud type work boat as an embodiment of the present invention will be explained with reference to the drawings. Fig. 4 is a side view thereof;
FIG. 5 is a side view showing the operation of the main parts, and FIG. 6 is a plan view of the main parts.

As shown in FIG. 4, a bendable spud 11 is attached to the hull 10 of one work boat.
The base end is attached to the trunnion 1 on the stern protruding support part 10a of the hull 10.
Spud main body connection arm l that is pivotally connected at 2 and can swing
l &.

The spud main body 11b is pivotally attached to the arm lla via a trunnion 13 and extends obliquely to the seabed.

The spud main body 11b is suspended via a wire 15 by a gun holder 14 on the hull.

The spud main body 11b is raised and lowered through this wire 15.

In addition, as a drive mechanism for swinging the arm 11&, the hull 1
A hydraulic cylinder 16 is mounted between the spud body 11b and the spud body 11b. Furthermore, the spud body 11b is provided with an engaging end 11c that can be vertically engaged with the seabed. 1. In the inclined spud-type work boat of the present invention, the engaging end 11C of the spud main body 11b is vertically dug into the seabed, and then the arm 11a is moved relative to the hull 10 by the actuation of the hydraulic cylinder 16. As shown in Fig. 5.6, the hull 10 can be accurately advanced by a required distance d by swinging it backwards.As the hull IO moves forward, dredging work, etc. After doing this, lift the spud body 11b'i with the wire 15 and pull out the retaining end llC from the seabed, and remove the hydraulic cylinder 1.
6 to pull the arm lla forward, and then lock the retaining end 11c of the spud body 11b to the seabed again, and by operating the hydraulic cylinder 16, the hull 10i is further moved the required distance d.
In addition, with the retaining end lie of the spud body anchored to the seabed, if the hydraulic cylinder 16 is operated to swing the arm lla in the direction of drawing it relatively toward the hull 10, Hull 1
0 can also be moved backwards.

As detailed above, the inclined spud type work boat of the present invention has the great advantage of eliminating the need for a spud carriage (see reference numeral 6 in Figure 3), and also saves space for installing the spud carriage on the boat. It is.

In addition, during waves, the moment generated by the reaction force from the seabed soil acting on the tip of the spud is
．． 13, there is an advantage that reinforcement is much easier than in the case where a spud carriage is provided.

[Brief explanation of drawings]

Fig. 1.2 shows a conventional work boat, Fig. 1 is a longitudinal sectional view thereof, Fig. 2 is a plan view thereof, and Fig. 3 is a longitudinal sectional view showing an example of an inclined spud type work boat. and 4th to 6th
The figures show a tilting spud-type work boat as an embodiment of the present invention. Fig. 4 is a side view thereof, Fig. 5 is a side view showing the operation of its main parts, and Fig. 6 is a side view of its main parts. FIG. 10...hull, 10a... stern protruding support part. 11...Spud% 11a...Nupasodo body connection arm, 1lb--Spud body, lle/e engagement end, 1
2.13...Trunion, 14...Gantry, 15-
・Wire, 16... Hydraulic cylinder. Sub-agent Patent Attorney Yoshihiko Ion

Claims (1)

[Scope of Claims] A spud main body connecting arm comprising a bendable spud attached to a ship's hull, the spud having its upper end pivoted to the ship's hull so that it can swing back and forth. The spud main body is pivotally connected to the arm and can extend obliquely to the seabed, and a drive mechanism for swinging the arm is mounted between the arm and the hull. . Tilting spud type work boat.