JP2005219677A - Deck structure of bulk carrier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an upper deck structure that can be used as a scaffold for inspecting a cross deck back surface between hatches, in a bulk carrier. <P>SOLUTION: In the deck structure of the bulk carrier, the upper deck of the cross deck between the hatches is made to have double structure forming a space separated from the inside of a hold. A manhole for accessing to the inside of the space is provided on the upper deck surface of the cross deck part. A worker is enabled to enter/exit to/from the space through the manhole, and perform the maintenance and inspection of the upper deck back surface of the cross deck part from the space. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a deck structure of a bulk carrier, and more particularly to a structure of an upper deck that can be used as a scaffold for checking the back side of a cross deck between hatches in a bulk carrier.

  In a ship, a girder or a longi material is provided as a reinforcing material in the longitudinal direction of the hull on the back surface of the upper deck, the ship side and the inner surface of the bottom shell plate. Floor materials and beams are provided as reinforcements in the ship's side) or in the lateral direction (the bottom of the ship, the upper deck).

And the reinforcing material of the vertical direction and the horizontal direction is penetrated mutually, and the reinforcing materials are joined to the inner surface of the outer plate or by welding.
Therefore, it is necessary to maintain and inspect each of these welds regularly or as necessary. In this maintenance and inspection, the bottom and the side of the ship with a double hull structure are easily accessible, but the maintenance and inspection on the back of the upper deck is very difficult.

  In the maintenance and inspection of the upper deck back surface, a temporary scaffold is generally suspended from the reinforcing material on the upper deck back surface, and the maintenance inspection is performed from the scaffold. Alternatively, seawater is filled in the hold, a raft is floated, and the raft is inspected, or a work vehicle having an extendable boom is carried into the hold, and the boom of the work vehicle is extended to extend the boom tip. Or checking from the cage supported by

However, in any of these methods, a large amount of work and time are required for preparation and setup for maintenance and inspection, and work cannot be performed when loading and loading, making it difficult to perform maintenance and inspection appropriately.
Also, depending on the load, harmful gas may be generated, and it is necessary to eliminate the generated harmful gas before entering the hold.

  As shown in the schematic cross section of FIG. 6, the bulk structure of the bulk cargo ship is provided with an inclined plate 4 on the side wall inner plate 3 side of the hatch combing 2 in order to keep the balance of the cargo during navigation. Reference numeral 5 denotes an upper deck, and a portion surrounded by the upper deck 5, the inclined plate 4, and the both inner plates 3 is formed as a top side tank 6. Reference numeral 1 denotes a hull.

Therefore, the back surface of the upper deck 5 on the left and right sides of the hatch combing 2 can be inspected from inside the top side tank 6 (see, for example, Patent Document 1).
However, the back side of the cross deck 7 between the hatches in the front-rear direction cannot be inspected from the top side tank 6.

Further, as shown in FIG. 7, in the bulk cargo ship, an upper tool 9 is partially provided in the connecting portion between the cross deck 7 and the horizontal partition wall 8, and the inside of the upper tool 9 is also used as a traffic route. There are also things.
In this case, the rear surface of the cross deck 7 can be inspected and maintained from within the upper tool 9, but the upper tool 9 is provided to reinforce the connection between the upper deck 5 and the horizontal partition wall 8. Even if the upper tool 9 is used as a scaffold, the range that can be inspected is limited.

Japanese Patent Laid-Open No. 9-301266 (Page 2, FIG. 1 and FIG. 2)

By the way, in recent years, there have been many accidents involving the loss of bulk carriers, and the importance of annual inspection of ships has been discussed at the International Maritime Organization (IMO). Permanent access to the back of the deck was required. In other words, it was necessary to provide a fixed access on the back of the upper deck.
In particular, since bulk carriers have hatches on the upper deck, that is, openings, thorough inspection of the back side of the cross deck between the hatches is necessary. Permanent access is required.

  The present invention has been made upon request as described above, and an object of the present invention is to obtain a structure of an upper deck that can be used as a scaffold for checking the back side of a cross deck between hatches in a bulk cargo ship. And

  It is a deck structure of a bulk carrier, and the upper deck of the cross deck part between the hatches has a double structure that forms a space separated from the inside of the hold, and the upper deck surface of the cross deck part in the space A manhole was provided for access to and from the manhole to enter and exit the space, allowing maintenance and inspection of the upper deck back of the cross deck from within the space.

  The upper deck of the cross deck part is provided with an inner steel plate between the left and right inclined plates of the top tank, front and rear bulkheads are provided before and after the inner steel plate, and the upper deck of the cross deck part has a double structure. The front and rear ends of the inner steel plate are directly joined to the hatch end beam to make the upper deck of the cross deck part into a double structure, and the horizontal bulkhead is connected to the upper deck. Another feature is that a space separated from the inside of the hold was formed at the front and back.

Since the upper deck of the cross deck part has a double structure to form a space isolated from the inside of the hold, this space can be used as a permanently safe inspection scaffold.
In addition, inspection can be performed even when bulk cargo is loaded, and inspection can be performed even when harmful gas remains in the hold.
Furthermore, there is an effect that the structural member of the space serves as a reinforcing material for the cross deck portion.

  The best mode of the present invention shown in the drawings will be described below. FIG. 1 is a longitudinal sectional view schematically showing a bulk carrier implementing an upper deck structure according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is an enlarged transverse sectional view taken along line AA of FIG. FIG. 4 is a schematic diagram showing another example of the present invention, and FIG. 5 is a schematic diagram showing still another example. 6 and 7 are denoted by the same reference numerals, and detailed description thereof is omitted.

Reference numeral 10 denotes an inner steel plate attached to the inclined plate 4 in the hold at a position between the hatches. Therefore, the upper deck 5 of the cross deck 7 has a double structure.
Reference numeral 11 denotes a front and rear partition wall having a cross-sectional shape in the upper part of the hold. Reference numeral 12 denotes a hatch end beam that surrounds the hatch opening and is fixed to the lower surface of the upper deck 5 like the hatch combing 2. The front and rear partition walls 11 are welded to the inner steel plate 10, the inclined plate 4, and the hatch end beam 12. It is joined.

Therefore, a space that is surrounded by the inner steel plate 10, the front and rear partition walls 11, the inclined plate 4, the hatch end beam 12, and the upper deck 5 is formed on the lower surface of the cross deck 7 and is isolated from the inside of the hold. The horizontal partition 8 is connected to the upper deck 5 through the space structure.
The upper deck 5 of the cross deck 7 is provided with a manhole 13 for workers to enter and leave the space.

The depth of the space described above, that is, the mounting position of the inner steel plate 10 is about 1.5 m to 2.0 m from the upper deck surface 5. Therefore, an operator can enter the space from the manhole 13 at any time, and the back surface of the upper deck 5 of the cross deck 7 can be inspected and repaired. At this time, since the space is formed over the entire area of the cross deck 7 portion,
The back surface of the upper deck 5 of the cross deck 7 can be inspected and repaired over the entire surface.

  In the above example, it is described that one space is formed over the entire area of the cross deck 7 and the horizontal partition wall 8 is connected to the space, that is, the inner steel plate 10, but as shown in FIG. 8 may be directly connected to the upper deck 5 to form a space divided in two before and after the horizontal partition wall 8. In this case, a manhole 13 may be provided in each of the spaces formed by dividing into two, or a traffic door may be provided in the horizontal partition wall 8 to enter and exit on both sides.

  In the configuration shown in FIG. 5, the inner steel plate 10 is inclined forward and backward without using the front and rear partition walls 11 and directly joined to the lower end of the hatch end beam 12. In this case, the inner steel plate 10 may be widened toward the center and directly joined to the inclined plate 4 or may be joined in the same shape as the cross deck 7 in a plan view by providing left and right partition walls. It may be.

  Since the spatial structure described above serves as a reinforcing member for the connecting portion between the horizontal partition wall 8 and the upper deck 5, it is not necessary to separately provide the upper stall 9 partially provided in the conventional bulk carrier.

  In addition, when a bulk material is loaded in the past, the bulk material is piled on the framework of the reinforcing material on the back of the upper deck (because L-shaped steel or T-shaped steel is used, and the rib portion). However, in the present invention, the outer surface of the space structure (the surface facing the inside of the hold) is not provided with a reinforcing framework, so the work of removing loose materials during handling is unnecessary. There is also an effect of becoming.

The schematic longitudinal cross-sectional view of the bulk carrier which implemented the upper deck structure by this invention. FIG. The expanded cross-sectional view along the AA line of FIG. Schematic which shows the other example of this invention. Schematic which shows the further another example of this invention. Schematic which shows the conventional upper deck structure of a bulk carrier. The schematic longitudinal cross-sectional view of the conventional bulk carrier.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hull 2 Hatch combing 3 Side wall inner plate 4 Inclined plate 5 Upper deck 6 Top side tank 7 Cross deck 8 Horizontal partition 9 Upper tool 10 Inner steel plate 11 Front and rear bulkhead 12 Hatch end beam 13 Manhole

Claims (4)

  The upper deck of the cross deck part between the hatches has a double structure that forms a space separated from the inside of the hold, and a manhole for access to the space is provided on the upper deck surface of the cross deck part. The deck structure of a bulk cargo ship, which is capable of entering and leaving the space and allowing maintenance inspection of the upper deck backside of the cross deck part from within the space.   The upper deck of the cross deck portion is provided with an inner steel plate between the left and right inclined plates of the top side tank, and front and rear bulkheads are provided before and after the inner steel plate, so that the upper deck of the cross deck portion has a double structure. The deck structure of a bulk carrier according to claim 1.   The deck structure of a bulk carrier according to claim 1, wherein the inner steel plate is inclined forward and backward, and the front and rear ends of the inner steel plate are directly joined to the hatch end beam to form a double structure of the upper deck of the cross deck portion.   The deck structure of a bulk carrier according to claim 1, wherein the horizontal bulkhead is connected to the upper deck, and a space separated from the inside of the hold is formed before and after the horizontal bulkhead.

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