JPS58224887A - Trim apparatus for vessel or the like - Google Patents

Abstract

PURPOSE:To permit speedy running onto the ice in case of ice breaking by installing a solid ballast which is shiftable along the longitudinal direction of the hull into the double bottom of the hull of an ice breaker, and permitting trim to be freely adjusted speedily and simply. CONSTITUTION:A solid ballast is installed in shiftable ways along a rail arranged along the longitudinal direction of a hull 1, into the double bottom of the hull. In substitution for trim adjustment by pouring water into and discharging it from a ballast tank in the conventional way, the solid ballast is shifted in the longitudinal direction of the hull, and thus, trim is adjust speedily and simply, and running onto the ice on ice breaking operation can be carried-out speedily.

Description

[Detailed description of the invention] The present invention relates to a trim device for ships and the like.

For example, in conventional icebreakers, as shown in the side view of Figure 1, the hull is trimmed with seawater ballast and the ice IC is removed.
Because the ship breaks the ice by lifting the hull SH on top, it takes a considerable amount of time to move several hundred tons of seawater between the bow ballast tank and the stern ballast tank.
Additionally, free water in the ballast tank reduces GM, which has a negative impact on the ship's stability.

The present invention was proposed in view of the above circumstances, and aims to provide a trim device for a ship, etc. that can quickly trim without impairing the stability of the ship. It is characterized by comprising a solid ballast attached to the bow side and/or the stern side of the upper surface of the heavy bottom, and means for moving the solid ballast to a desired position along a rail laid in the stern direction. .

An embodiment in which the present invention is applied to an icebreaker will be explained with reference to the drawings. FIGS. 2 and 3 are longitudinal cross-sectional views showing the first and second embodiments, respectively, and FIG. FIG. 4 is a partially enlarged perspective view showing the solid ballast moving device of FIG. 3;

In the above diagram, ■ is the hull, 2 is the double bottom, 4 is the drive pinion that meshes with rank 10, which will be described later, 5 is the reduction gear, 6 is the reduction gear, 7 is the motor, 8 is the frame, and the drive pinion 4
．． Reduction gear 5, reduction gear 6. A motor 7 is assembled into a frame 8. Reference numeral 9 is connected to the frame 8 by a solid ballast made by storing something with a large specific gravity, such as iron scrap, in a steel box. 10 is a rack installed in the bow and stern portions of the double bottom 2 or on the upper surface of the double bottom 2 in the direction of the centerline; 11;
13.13 is a roller (or wheel) inserted between the lower surface of solid ballast 9 and the upper surface of parallel rail 12, which will be described later.
are guide rails laid parallel to the outside of the parallel rails 12 and 12, respectively, to prevent the solid ballast 9 from lateral vibration during movement; Reduction gear 5. Reducer 6. The motor 7 and the frame 8 cooperate to constitute the drive device 3.

In such a device, the motor 7 is powered by compressed air, hydraulic pressure,
A solid ballast 9 is rotated by electric power or the like, and the drive pinion 4 is rotated via the reducer 6 and the reduction gear 5.
The frame 8 fixed to is moved in the longitudinal direction along the rack 1o.

At this time, the solid ballast 9 is guided on the rail 12 via rollers or wheels 11 with low friction.
2, the guide rails 13.13 serve to prevent sideways movement of the solid ballast 9 during movement.

According to such a device, the following effects can be achieved.

(1) Traditionally, moving water ballast was done using a pump, which took time, but with this device, solid ballast can be moved at a considerable speed depending on the motor capacity and gear reduction ratio. I can do it.

(2) Conventionally, by filling the two ballast tanks at the bow and stern, the free water in the ballast tanks increases, resulting in a decrease in GM and having a negative impact on the stability of the ship. With this device, you don't have to worry about that.

(3) By installing this device on the bottom of the ship as much as possible, it can also be used as the fixed ballast of the ship.

(4) To! It is possible to easily and accurately control the J-movement.

(5) This device can be widely applied to icebreakers, icebreaking offshore structures, and floating work vessels that undergo many trim maneuvers.

In short, according to the present invention, a solid ballast attached to the bow side and/or the stern side of the double bottom or the upper surface of the double bottom of the hull, and the solid ballast attached to the bow side and/or the stern side of the double bottom of the hull, The present invention is extremely useful to the industry because it provides an icebreaker that can be quickly trimmed without compromising stability performance.

[Brief explanation of drawings]

Figure 1 is a side view of a known icebreaker, Figures 2 and 3 are
The figures are longitudinal sectional views showing a first embodiment and a second embodiment of the present invention, respectively, and FIG. 4 is a partially enlarged perspective view showing the solid ballast moving device of FIGS. 2 and 3. ■...hull, 2...double bottom, 3...drive device, 4...drive pinion, 5...reduction gear, 6...reduction i, 7...motor, 8...frame, 9...solid Ballast, lO...
Rack, 11...Roller (or wheel), 12...Rail, 13...Guide rail, 14...Guide roller, Sub-Agent Masafumi Tsukamoto, Patent Attorney

Claims (1)

[Claims] A solid ballast attached to the bow side and/or the stern side of the double bottom of the ship or on the upper surface of the double bottom, and means for moving the solid ballast to a desired position along a rail laid in the breech direction. A trim device for a ship, etc., characterized by comprising: