FI75771C - Multi-deck deck hatch system for ships. - Google Patents

Description

75771

SHIP'S MULTI-BLOCK DECK SYSTEM - DÄCKLUCKS-SYSTEM AV FLERA PANELER FÖR FARTYG

The present invention relates to a ship's multi-block deck-hatch system in which the blocks are in a closed position on the hold opening and on which deck cargo such as containers can be loaded and between which are members such as hinges which receive the ship's longitudinal horizontal forces and torque and limiter. , which receives the transverse horizontal forces of the ship between the blocks, forming a horizontally rigid deck hatch unit.

Known deck hatch systems use various guides or locking devices at the edges of the hatches to ensure that the hatches remain laterally in place when the vessel is subjected to heavy seafar where the hull of the vessel is twisted. All of these known steering and locking systems cause additional stiffenings on the sides of the hull and thus weight on the entire vessel. The hatch system, like all hatches, must be watertight in all conditions. The deck hatches of a modern ship are very large compared to the total surface area of the ship’s deck. As a result, the elastic deformations of the hull of a ship at sea are so great that the cargo hatch sealing arrangements must be such as to allow sliding between the hatch blocks and the hatch edge attached to the hull and the hull. Such sealing arrangements are already known.

Also known is a statically determined force receiving system that allows the parts of the hatch to move on the horn as well as the movements between the individual blocks. The disadvantage of these systems is the considerable increase in weight to the hull of the ship, as lateral forces of up to 300 tonnes have to be transmitted to the hull of the ship through the longitudinal side of the horn, which requires local reinforcements.

It is an object of the present invention to obviate the above drawbacks. The deck hatch system according to the invention is characterized in that the deck hatch unit is attached to the deck hatch edge by three stops, one of which, at the hinge side of the deck hatch unit, receives transverse forces between the hatch and rim and two stops on the longitudinal sides The present invention avoids the aforementioned reinforcements by applying the forces caused by the deck cargo on the hatch to the hull of the ship, utilizing already existing structures, i.e. the transverse forces of the ship are applied to the transverse side of the horn and the longitudinal forces to the longitudinal side of the horn. Due to changes in the shape of the ship, the calculations must be based on the fact that only one transverse or longitudinal force-transmitting member, i.e. the limiter, operates simultaneously.

A preferred embodiment of the invention with at least two successive closed hatch systems in the closed position is characterized in that the stops on the longitudinal sides are located close to the seam between the deck hatch units, preventing longitudinal movements of the vessel in the seam. In this way, the seam remains tight even if the hull is twisted.

The invention will now be described, by way of example, with reference to the accompanying drawings, in which

Figure 1 shows the ship's hatch system at an angle: seen from above.

Figure 2 shows a top view of the deck hatch system.

Figure 3 shows a section taken along the line III-III in Figure 2.

Figure 4 shows a section taken along the line IV-IV in Figure 2.

3,75771

Fig. 5 shows the point in Fig. 4 seen from the direction V.

In the ship's hatch system, blocks 1, 2, 3, 4 are in the closed position on the ship's hold, as shown in the figures. On top of blocks 1, 2, 3, 4, cover cargo such as containers or other transportable goods can still be loaded. The block positions shown in dotted lines in Figure 1 are intermediate positions between the closed and open positions. In the open position, the blocks turn completely together and at both ends of the hold opening, for example guided by hinges. Between blocks 1 and 2 and 3 and 4 there are hinges 5 which receive the longitudinal horizontal forces of the ship between blocks 1 and 2 and 3 and 4 and a torque and stop member 6 which receives the transverse horizontal forces of the ship between blocks 1 and 2 and 3 and 4. forces forming horizontally rigid deck hatch units. The deck hatch unit is attached to the deck hatch rim 7 by three stops 8, 9 and 10, one of which receives the transverse forces F between the hatch and the rim and the two stops 9, 10 receive the longitudinal forces G of the vessel. an edge 11 projecting from the edge, which is movable between the arms 12 of the fork-shaped counterpart, which are attached to the deck structure 7 of the vessel.

It will be apparent to those skilled in the art that the invention is not limited to the examples set forth above but may vary within the scope of the claims set forth below.

Claims (2)

4,75771 A multi-block deck hatch system in which the blocks (1, 2, 3, 4) are in a closed position in a watertight manner over an opening in the hold and over which deck cargo such as containers can be loaded and between which there are members (5) such as hinges for receiving blocks (1 and 2 and 3 and 4) and the torque and limiting member (6) which receives the transverse horizontal forces between the blocks (1 and 2 and 3 and 4) forming horizontally rigid deck hatch units, characterized in that the deck hatch unit is fixed to the deck hatch rim (7) by three stops (8, 9, 10), one of which, at the hinge side of the deck hatch unit, receives the transverse forces (F) between the hatch and the rim and two stops, on the longitudinal sides of the deck hatch units, receive the longitudinal forces of the vessel (G). A deck hatch system according to claim 1, having at least two successive closed deck hatch units (1,2 and 3,4) in a closed position, characterized in that the stops (9,10) on the longitudinal sides: are located close to the seam between the deck hatch units: preventing the ship longitudinal movements in the seam. Deck hatch system according to claim 1 or 2, characterized in that the stops (8, 9, 10) consist of a tongue (11) projecting laterally from the edge of the deck hatch unit, which can move between the forks (12) of the fork-shaped counterpart attached to the ship's deck structure (7).