JPH0532284U - Hatch cover support structure for ships - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a hatch cover support structure suitable for a container ship or the like, and more particularly to a hatch cover support structure for a ship that can be easily moved with displacement of the hull. [Structure] A hatch combing 7 is projected on the deck along the periphery of a hatch formed on the deck of a ship, and a hatch combing top plate 6 is horizontally connected to the hatch combing 7. In the hatch cover 1 which is placed on the top plate 6 and can cover the hatch, the hatch cover 1 is composed of a hatch cover top plate 1a and a hatch cover skirt plate 2, and the inside of the hatch cover skirt plate 2 is formed. The upper liner 4 made of a material having a low coefficient of friction is fixed to the hatch cover 1 while the lower liner 5 having a smooth surface is fixed on the hatch coaming top plate 6 so that the upper liner 4 is always in contact therewith. Is allowed to move freely, resulting in hull cover displacement during ship navigation. While traveling to prevent a has a feature in that damage, such as hatch cover skirt portion is to be prevented.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a hatch cover support structure suitable for a container ship or the like, and more particularly to a hatch cover support structure for a ship that can be easily moved along with displacement of the hull.

[0002]

[Prior Art]

 As a conventional hatch cover support structure, there is one as shown in FIG. 5, which includes a bracket 2a projecting from the side surface of a hatch cover skit plate 2 suspended from the periphery of the hatch cover top plate 1a of the hatch cover 1. The upper liner 4 is attached to the lower side liner 5 while the lower liner 5 is attached on the hatch coaming top plate 6 so that the lower surface of the upper liner 4 directly contacts the lower liner 5 to support the hatch cover. It is composed. In the conventional case, both the upper liner 4 and the lower liner 5 are made of steel. In FIG. 5, reference numeral 3 is a strength member, reference numeral 12 is a stopper provided upright on the hatch coaming top plate 6, reference numeral 13 is a gasket, and reference numeral 14 is a seal bar.

[0003]

[Problems to be solved by the device]

 By the way, in the conventional hatch cover support structure for a ship, since both the upper liner and the lower liner are made of steel as described above, the hull twists between the hatch cover and the hatch combing during navigation of the ship. When the relative displacement occurs, the upper liner 4 and the lower liner 5 attached to the lower part of the bracket 2a of the hatch cover 1 slide a little (about ± 30 mm), but the relative displacement is sufficiently absorbed because the friction coefficient is large. Instead, the hull displacement that occurs repeatedly during the voyage repeatedly causes the shape displacement of the hatch cover 1, which eventually causes partial damage to the hatch cover 1.

Further, since the iron plates of the upper liner 4 and the lower liner 5 are in contact with each other and slide, the sliding contact between the two liners is caused when a liquid that generates a flammable gas is loaded in the hold. Sparks generated by motion may ignite gas and cause a fire or explosion.

Further, in the conventional hatch cover support structure in a ship, since the bracket 2a is provided on the outside of the hatch cover 1 and the upper liner 4 is fixed to the bracket 2a, when a container or the like is mounted on the hatch cover, The weight of the container body acts as bending stress on the part protruding to the. Therefore, it is necessary for the bracket 2a to have a large shape with great strength in order to withstand this. There is also a problem that the area of the hatching combing top plate increases due to the protruding bracket 2a.

The present invention is intended to provide a hatch cover support structure for a ship that solves the above problems.

[0007]

[Means for Solving the Problems]

 Therefore, the hatch cover support structure for a ship according to the present invention includes a hatch formed on the deck of the ship, a hatch combing projecting on the deck along the periphery of the hatch, and a hatch for the hatch. It has a hatching combing top plate that is horizontally connected to the combing and a hatch cover that is placed on the hatching combing top plate and can cover the hatch. The hatch cover is a hatch cover top plate and a hatch cover. It consists of a skirt plate and an upper liner made of a material with a low friction coefficient is fixed to the inside of the hatch cover skirt plate, while a lower liner with a smooth surface is placed on the hatch combing top plate. It is characterized by being fixed so that it can always contact the liner.

[0008]

[Action]

 In the above-described hatch cover support structure for a ship according to the present invention, the upper liner made of a material having a low coefficient of friction, which is fixed to the inside of the hatch cover skirt plate of the hatch cover, is above the lower liner fixed to the upper surface of the hatch combing top plate. Can be slid smoothly without being restricted by the rubbing force.

At that time, there is no risk of ignition because the iron is not in contact with each other unlike the conventional one.

Further, since the upper liner is fixed to the inside of the hatch cover skirt plate, the bracket unlike the conventional one is unnecessary, and the area of the hatch combing top plate can be reduced.

[0011]

【Example】

 Referring to the drawings, a hatch cover support structure for a ship according to an embodiment of the present invention will be described below. FIG. 1 is a side sectional view of a main part, FIG. 4 is a side cross-sectional view showing a state in which the hatch cover has moved, corresponding to FIG. 1. 1 to 4, the same reference numerals as those in FIG. 5 indicate almost the same members. Also in this embodiment, the hatch cover 1 is supported on the lower liner 5 fixed to the hatch coaming top plate 6 through the upper liner 4.

In this case, the upper liner 4 is fixed to the inside of the hatch cover plate 2 which is vertically provided on the peripheral edge of the hatch cover top plate 1a, and the upper liner 4 is made of non-ferrous metal (copper alloy). Alternatively, it is made of a material having a low friction coefficient such as non-metal (synthetic resin) or thermoplastic resin. The lower liner 5 fixed to the upper surface of the hatch coaming top plate 6 is made of the same material as the stainless steel plate or the upper liner 4, and the surface thereof is formed smoothly. It is stretched over a wider area. Reference numeral 9 in the figure indicates a support column for a stopper that is planted in the hull.

In the above structure, when the hull is displaced during the voyage, the hatch coaming 7 and the hatch combing top plate 6 are displaced along with the displacement of the hull, but the hatch cover 1 placed on the lower liner 5 is Does not follow the displacement of the lower liner 5 because the friction coefficient of the upper liner 4 is low, and the upper liner 4 easily slides on the contact surface with the lower liner 5 as shown in FIGS. Therefore, the hull displacement is not directly received.

When it further slides, the hatch cover stopper 8 attached to the outside of the hatch cover skirt plate 2 hits the stopper column 9 standing upright on the upper deck in consideration of the upper limit of displacement of the hull, and the upper portion Care is taken to prevent the liner 4 from falling off the lower liner 5.

Further, as shown in FIG. 2, in order to prevent the intrusion of seawater into the hold, a special triangular gasket 11 is arranged in series between the upper liners 4 arranged intermittently. However, since the load applied to the gasket 11 is constant regardless of the displacement of the hull, the life of the gasket 11 can be extended.

In this embodiment, since the seal bar in the conventional example is removed, the sealing performance is poor. However, in the case of a container-only ship, the container itself has already been sealed, so the leak does not occur in the hatch. By treating the treated water with a bilge pump, etc., there is no practical problem.

[0017]

[Effect of the device]

 As described in detail above, according to the hatch cover support structure for a ship of the present invention, the following effects and advantages are obtained. (1) The hatch cover can move freely because the sliding surface is formed by the upper liner made of a material with a low coefficient of friction and the lower surface liner with a smooth surface. As a result, damage to the hatch cover skirt or the like due to hull displacement can be prevented. (2) Since the two liners do not come into contact with each other at the iron side, sparks are not generated when the liner slides even if explosive gas is loaded in the hold, which is advantageous for safety measures. (3) Since the upper liner is fixed to the inside of the hatch cover skirt plate, compared to the conventional bracket structure, the man-hours and weight are reduced, which is less expensive and the hatch cover top plate has a lower cost. The area is reduced.

[Brief description of drawings]

FIG. 1 is a side cross-sectional view of a main part of a hatch cover support structure in a ship according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

[Fig. 3]

FIG. 4 is a side sectional view showing a state in which the hatch cover is moved, corresponding to FIG. 1.

FIG. 5 is a side sectional view of a main part of a conventional hatch cover support structure for a ship.

[Explanation of symbols]

 1 Hatch cover 1a Hatch cover top plate 2 Hatch cover skirt plate 4 Upper liner 5 Lower liner 6 Hatch combing top plate 7 Hatch combing 10 Container

Claims (1)

[Scope of utility model registration request] 1. In a ship, the hatch formed on the deck of the ship, the hatch combing projecting on the deck along the peripheral edge of the hatch, and the hatch combing horizontally connected to each other. Hatch combing top plate,
The hatch cover has a hatch cover that is placed on the hatch coaming top plate and can cover the hatch, and the hatch cover is composed of the hatch cover top plate and the hatch cover skirt plate, and the inside of the hatch cover skirt plate. An upper liner made of a material having a low coefficient of friction is fixed, while a lower liner having a smooth surface is fixed on the hatch coaming top plate so that the upper liner is always in contact with the upper liner. Hatch cover support structure.