FI124778B - Arrangement to support containers carried on the cargo ship deck - Google Patents

Description

BACKGROUND OF THE INVENTION The present invention relates to an arrangement for supporting containers transported on a cargo ship deck, which includes cargo hatches to be placed on the cargo ship's cargo spaces, to which cargo containers are to be secured, supported by struts, and which hatches are positioned between the bridging bridges so that they can be removed and retracted.

On a cargo ship, containers are carried in the cargo area under the cargo hatches and on the deck over the cargo hatches in several rows and queues and over several layers. The cargo area has guides which the containers rely on at sea. The deck has removable cargo hatches to close the hold below. Containers above the deck are carried over the hatch covers. Transverse deck support structures for containers, so-called. mooring bridges shall be so spaced that the cargo hatch can be removed and lowered by crane when unloading and reloading the ship.

After the containers have been loaded onto the ship, at least some of the containers on top of the cargo hatch are secured at their ends to the mortise bridge by means of support rods and wheel bolts. Each support bar is secured at one end to one corner of the container and at one end to a strap screw which is secured at its other end by a bridging bridge. Tighten the mounting by turning the wheel screw.

As the ship tilts at sea, the bridging bridges are subjected to longitudinal, transverse and vertical forces due to the support bars of the containers.

The known anchorage bridges are dimensioned such that their support structures at the heel between cargo spaces are relatively narrow relative to the width of the heel below the surge bridge (i.e. the bridge structure is short in the longitudinal direction of the ship). The reason is the space reserved for the hatch in the traditional structure - the hatch rests on the same heel.

Known bridging bridge arrangements are disclosed, for example, in the following patents: KR20070115383 and EP0815004.

In earlier solutions, due to the narrowness of the bridging bridges, their structures become heavy to achieve sufficient strength. Further, the vibration of the hull caused by the operation of the ship's engine may cause strength and vibration problems in conventional surge bridge structures. The object of the present invention is to provide an improved arrangement for supporting containers carried on a cargo ship deck, the arrangement of the invention being characterized in that the ratio of the maximum width of the supporting structures on the transverse bridge to the transverse deck is at least 0.8 at one or more locations.

A preferred embodiment of the arrangement according to the invention is characterized in that the ratio of the maximum width of the supporting structures on the cross member of the surge bridge to the width of the cross member is at least 1 at one or more points of the bridge.

Another advantageous embodiment of the arrangement according to the invention is characterized in that the necessary recesses have been made in the cargo hatch compatible with the surge bridge at the support structures of the surge bridge.

Yet another preferred embodiment of the arrangement according to the invention is characterized in that the cargo hatch is provided with brackets extending over the cross-member.

With the wider structure of the invention, the surge bridge can be made more lightweight and at the same time it is possible to reduce the harmful vibration tendency of the surge bridge. The structure is advantageous to manufacture, and it is also possible to realize higher anchoring bridges with the structure according to the invention.

The invention will now be explained in more detail by means of preferred embodiments with reference to the accompanying drawings, in which:

Figure 1 illustrates a portion of a conventional surge bridge, a cargo hatch, and a stack of containers with two support bars engaged.

Figure 2 shows the entire conventional surge bridge and one container stack stacked on the cargo hatch.

Figure 3 is a cross-sectional view of a traditional sailing bridge and its supported containers.

Figure 4 is a cross-sectional view of the surge bridge of the invention and the containers supported therein.

Figure 5 is an axonometric and substantially reduced view of the cargo hatch recesses and the support structures of the surge bridge extending thereto.

Figures 1-3 illustrate the prior art, so they are not described in detail here. They are intended to illustrate the state of the art. Fig. 1 thus shows a portion of the burial bridge 1 into which a portion of the containers 5 is supported by support bars 6. The container stack is over the cargo hatch 4. Containers are also transported in cargo spaces under the hatch covers. Burial bridges are of various heights. Typically, they extend from the level of the ship's weather deck to the height of two, three or four containers. As the ship travels at sea, the container piles exert great forces on the support rods 6 attached to the containers and further on the tipping bridge 1. These forces are transmitted to the ship's hull (transverse nose 2) through the structures of the tipping bridge.

Figure 2 shows that the surge bridge 1 extends from one side of the ship to the other, i.e. the ends of the surge bridge rest on the ship's longitudinal deck or hull structures. The surf bridge is supported on a cross-member 2 between cargo spaces. The invention is limited to that part of the surge bridge which is located between the cargo spaces and the cargo hatches.

Fig. 3 is a cross-sectional view of the thrust bridge 1. It is found that the maximum width of the sling bridge is clearly narrower than the crosshead 2 between the cargo spaces 3.

Figure 4 shows a solution according to the invention. Here, the width L of the mooring bridge is larger than before. It is preferable that the support structures of the surging bridge are as wide as possible, in particular to transfer the longitudinal forces of the ship to the transverse deck 2. The width of the transverse transom between cargo spaces 3, supported by the transverse bridge, is denoted by B. The invention is characterized by L / B of at least 0.8. It is also possible that the support structures of the surge bridge are as wide or even wider than the width B of the crossbeam, i.e. L / B> 1. It is obvious that a conventional hatch cover cannot be fitted because there is no suitable carrying surface for the crossbeam.

Due to the wider support structures of the sailing bridge, recesses have been made in the cargo hatch at 7 support structures of the sailing bridge. At the same time, the support structures of the landing bridge located at the recesses of the hatch cover can act as guiding pillars when lifting the hatch with a crane. Further, these support structures can act as horizontal cargo hatch guides, i.e. the support structures hold the cargo hatch in the correct position on the ship's slope as the ship moves and tilts.

It is also possible for the cargo hatch to be shorter in length, for example, to be provided with brackets extending over the cross-member 2 (not shown).

It will be apparent to one skilled in the art that the invention is not limited to the above embodiments, but may vary within the scope of the appended claims. Thus, for example, the support structures of the mooring bridge can be used in addition to plate and casing structures, for example, pipe profiles and / or rods. It is also possible that narrower transverse support structures in addition to the structures of the invention may also be used in the same burial bridge. The elements according to the invention have at least one bridging bridge.

If necessary, the symbols which may be presented in the specification together with other characteristics may also be used separately.

Claims (4)

An arrangement for supporting containers (5) transported on a cargo deck, comprising cargo hatches (4) placed over cargo vessels (3) on which cargo containers (5) are carried, and transverse cargo lifting bridges (1) secured to cargo spaces (5). 3) between the transverse brackets (2) and to which the bridging bridges (1) the containers (5) are supported by the supporting rods (6) and which the cargo hatches (4) are placed between the bridging bridges (1) so that they can be lifted and lowered in place, characterized in that the ratio of the maximum width (L) of the supporting structures on the cross-member (2) of the surge bridge (1) to the cross-section width (B) is at least 0.8 at one or more points of the bridge. Arrangement according to Claim 1, characterized in that the ratio of the maximum width (L) of the supporting structures on the cross-member (2) of the surge bridge (1) to the cross-section width (B) is at least 1 at one or more points. Arrangement according to Claim 1 or 2, characterized in that the necessary recesses (7) are provided in the cargo hatch (4) compatible with the surge bridge (1) at the support structures of the surge bridge (1). Arrangement according to one of Claims 1 to 3, characterized in that the cargo hatch (4) is provided with support brackets extending over the cross-member (2).