JPH03200499A - Small vessel building method - Google Patents

Abstract

PURPOSE:To reduce work at a littoral place at the time of building a small vessel for leisure by producing block bodies divided into measure transportable by land, and transporting them by land to a building place to joint them. CONSTITUTION:An aluminum plate 6 wound on a roll is press-formed (8) to the shape of block bodies 10-1-10-11 divided in the bulkhead position. The flank of the block body is provided with an opening hole part 10a as well as strength securing framed structure at need. These block bodies 10-1-10-11 are land- transported by a truck 4 to a shipbuilding place in a littoral area. At the building place, the strength obtained by jointing the block bodies is compared with that required for a ship, and the reinforcing keel 12 or the like is fitted as occasion demands. The block bodies 10-1-10-11 are then bonded by a laser welding machine 14 to assemble a hull. With this constitution, work at the littoral place can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a new method of constructing a small ship. The term "small boat" used here refers to one used primarily for leisure, sightseeing, or as a small fishing boat.

[Prior Art 1 The following two types of methods are known as conventional methods for constructing small vessels.

The first method is to use a mold to harden the resin into the shape of a ship. At this time, the outer skin material of the ship is usually formed by layering 8i layers of resin and reinforcing 8B material, such as glass fiber. The hull t formed in this way is usually reinforced from the inside with strength members such as a keel, ribs, bulkheads, etc. to form a hull.

The second method is to first fix a bone structure for ensuring strength, such as a keel or 111 wood, and then fix the skin material to this. Here, wood, iron, aluminum plate, etc. are used for the outer skin material. This includes so-called strip blanking.

[Problems to be Solved by the Invention] The first method is widely considered because it is possible to produce TFI by manufacturing the -jl type. However, this method requires a large number of hands in the process of laminating reinforcing members such as glass fibers and curing the resin, and it is also difficult to maintain a good working environment, resulting in a shortage of manpower. Also, the F Rr-' constructed in this way
The ship's hull retains its J3 shape even after the end of its life as a ship, making it difficult to scrap the ship and almost impossible to recycle resources.

The second method is to fix the hull material to the bone structure that has been constructed previously, so there are restrictions on the shape of the hull that can be constructed. It is not possible to realize a free shape. Furthermore, although aluminum ships are advantageous in terms of main construction, they also have the problem of higher construction costs compared to FRP ships if conventional construction methods are used. In particular, aluminum boats are greatly affected by welding strain.
It takes a huge amount of man-hours to remove the strain.

Regardless of which method is used, in order to build a ship of a size that is difficult to transport by land, even though it is a small ship (if the wheels exceed 2.5 m, land transport will actually be longer), it is necessary to build a ship in a coastal area. In addition to being restricted by construction sites, there is often a shortage of manpower at the construction site.

[First object of the present invention, means and effects therefor 1 Therefore, the first object of the present invention is to enable most of the construction work to be carried out in areas other than coastal areas, and must be carried out in coastal areas. [This is the main objective of the invention of claim 1].

The purpose of this is to provide a method for constructing small vessels.1. A culm that produces a block body divided into niz that can be transported by land,
1. Transporting the block L1 by land to a ship construction site;
The present invention is solved by a method for constructing a small boat, which includes a step of joining the transported block bodies into phase 0 to form a hull of the small boat.

According to this method, blocks can be produced even in places other than coastal areas, and small ships can be built in sea areas by joining the blocks together.

ESecond object of the present invention, means and effects therefor 1 The second object of the present invention is to ensure sufficient strength of the ship to be built, and to eliminate a considerable portion of the construction process. The aim is to provide a method for implementing the project outside Japan.
According to the invention of claims 2 to 4:

This purpose is to provide strength at the boundaries of the block bodies by using the skin material of the block bodies when the transported block bodies are joined together to form the hull of a small boat. The problem is solved by a method of building small vessels that includes the process of forming a construction structure.

According to this method, the joints of the block bodies simultaneously have strong rxT
This provides an Il-retaining bone structure, ensuring sufficient joint strength between the block bodies. Since a part of the outer skin material of the block body constitutes at least a part of this bone structure, the outer skin material of the hull and the strength-enhancing bone structure are integrated, and sufficient strength is ensured. .

A second object of the present invention is to provide the method according to claim 1, further including the step of fixing a stringer extending across a plurality of block bodies in the longitudinal direction of the ship at a ship construction site. The present invention is also solved by a method of constructing a small boat, characterized in that the hull of the small boat is formed by joining the block body made by the above-mentioned blocks to the stringer.

According to this method, the book body is joined with sufficient strength in the longitudinal direction by a longitudinal member such as a keel.

Furthermore, the second object of the present invention is also solved by a method for constructing a small ship according to claim 1, characterized in that the block body is divided at a bulkhead position of the ship.

According to this method, since the block bodies are joined together at the ship's bulkhead, the blocks are joined at the optimal position to ensure strength.
1" tsuku body TI"+1 z can be joined.

Next, an example of the tree defense will be explained. FIG. 1 is a diagram schematically showing a small ship 18 to be constructed and block bodies 1 to 12 forming it. It is assembled and constructed. Each block is divided into sections with a width of 2.5 meters or more, and can be transported on canvas without requiring special permission within the scope of Article 2 of the Safety Standards for Road Conveyance Vehicles. can.

FIG. 2 is a conceptual diagram ``Lj'' schematically showing the method of claim 1.

In the figure, 2 indicates four manufacturing factories for block bodies, and at that location (regional limitation 1j does not exist 1.■ In s2, an aluminum plate 6 wound on a roll is press-formed to match the shape of each block. (8) At this time, the production techniques and automation technologies used in automobile production are widely adopted.In some cases, roll forming is used instead of press forming.

In this case, each block is divided into C sections with a maximum width of 2.5 m, which is within the limit range of the safety standards, so the shape of each block can be formed freely with the west side, which is similar to conventional construction. Compared to aluminum boats built using this method, it is possible to have more control over the shape design.

In addition, in the wooden method, it is difficult to divide 10 blocks at the ship's bulkhead position, and in this way, the metal side of each block is surrounded by an aluminum plate, making it easy to maintain shape accuracy. can do. Of course, openings 10a can be provided on the side surfaces of each block body as necessary.

Inside each block, strong t! 1'Iil
A retaining bone structure 20 (see Figure 13) is fixed. The welding of the outer panels together or the outer panels and the strength-enhancing bone structure, as well as the welding of the strength-enhancing bone structures together, can be automated to a large extent by new welding techniques, such as laser welding.

Note that the outer plate end surface of each block body is processed into a specific shape for joining the block bodies together. This will be explained later in connection with FIG. 3.4.

Although it is most effective for building aluminum boats, tJ can also be applied to steel boats, wooden boats, or (<1) boats.

Now, the block body produced in this manner is transported overland by truck 4 to C, the ship's site in the waterfront area.

At a ship building site, the strength required for the ship is compared with the strength obtained by joining blocks together, and the strength required for the ship is compared with the strength obtained by joining blocks together. Longitudinal strength to ensure strength in advance, for example, keel 12
Keep it fixed. Then, the transported Bu [199 bodies are fixed to this keel. Moraronbu [One ivy body is also joined together. It is also preferable to use a laser welder in this process.

Gee 1f welding allows for relatively small welding strain.
I can't seem to get enough of myself. In addition, the welding marks are small, making the process of removing welding marks easier. According to this method, laser welding can be widely adopted because the welding location can be made so that 1 person (7) exists within 1 space.
f Welding is easy to automate. Furthermore, even in the case of conventional welding techniques, the welding locations are generally planar, making them suitable for automation.

After most of the hull 16 has been increased to +1 in this way,
The small ship 18 is constructed by performing interior work and the like. It is also possible that at least part of the interior work will be carried out within Area 2.
1 ability.

Now, finally, we will explain the details of the joining part of the block body.

FIG. 3 is a diagram showing a cross section of the joint portion of block bodies 10-4 and 10-5.

In the block bodies 10-4 and 10-5 of this embodiment, the outer panels constituting the outer skin 0 of the ship are formed of two aluminum plates 24 and 26, and the end faces of both aluminum plates are shown in the connection area 22. They are connected to form a strength-enhancing bone structure with a closed cross section. Note that this bone structure may have a partially open cross section to ensure the necessary strength6. Here, 22a and 22b shown are welding locations, and it is desirable that the flange portion 22G for configuring the bone structure for ensuring strength is formed in advance during press molding or roll molding in the first place 2. In addition to this bone structure for ensuring strength, a reinforcing bone structure 2 that extends in the longitudinal direction of the ship as necessary
0a or a reinforcing bone structure 20 extending in the transverse direction of the ship
b, which are fixed in advance to the inner surface of the block body in the r field 2, as described above.

Next, we will explain the joining structure of 10-piece bodies. First, the block body 10-5 is placed behind the block body 10-5.
7, a bone structure for ensuring strength similar to the connection portion 22 is formed at the ends of both outer plates.

Roughly illustrated, 30 indicates the rear partition wall of the cock body 10-5, to which the front partition wall of the block body 10-7 is joined. Since it can be fixed by welding, the front and rear vine bodies are firmly joined together.

Next, the joining of the left and right block bodies will be explained. In the case of this embodiment, the keel 12 is arranged at the front and rear, and each vine body is welded to the keel to form a bone structure with a closed cross section for ensuring strength. Koko-C” Illustration 28 a
, 28 b to 28 c! , Yoru) 13 places wo i'
I'm doing R. For this purpose, 11i! A flange 28 is preformed within 2.

Although a keel 12 is used in this embodiment, a keel is not required for very small vessels. In this case, a bone structure corresponding to a keel is formed between the left and right block bodies by the structure shown in part 22.

Furthermore, if a partition wall 32 is also installed between the left and right block bodies, the left and right block bodies are more firmly joined by welding the partition walls 32 together at appropriate locations.

A bone structure having a closed blood cut formed between the outer plates constituting the block or at the boundary of the block body (in addition to the one shown in FIG. 3, each scale mode shown in FIG. 4 is possible).

In the WI construction shown in FIG. 4A, a flange a is provided on one outer panel and a flange b is provided on the other outer panel, and both are welded at a location d. Then, place the third member C here, and place this at part C.
By welding 4, a strength-enhancing bone structure having a closed cross section is formed between the outer plates.

In the structure shown in FIG. 4B, the third part IJc is placed inside the vessel. According to this, there are only t and i 1 welding points on the outer surface of the hull, making it easier to clean the welding marks.

The structure shown in FIG. 4C forms a closed cross-section bone structure for ensuring strength without using a third part, and only requires two welding locations. This makes it possible to suppress welding distortion. Note that openings C may be provided to reduce weight if necessary.

The fourth diagram shows a structure with a rectangular closed cross section.

Moreover, FIG. 4E shows a structure with a semicircular closed cross section.

The shape and size of these closed cross sections are appropriately selected and used according to the required specifications.

The method of this embodiment described above is particularly suitable for building aluminum boats or steel boats. In particular, if an aluminum boat is built using this method, the construction cost can be reduced to the same level or even lower than that of building an FRP boat using conventional construction methods.

For this reason, it is expected that aluminum boats, which are easy to maintain and can reuse resources, will be used instead of FRP boats.

[Effects of the Invention] Now, according to the present invention, it is possible to enjoy the effect of withdrawing a considerable part of the ship-built MI culm without being geographically limited. Also, each manufacturing unit has a maximum width of 2.5
Since it is about m, the automobile production equipment, production technology,
Automation techniques can be used and the ship construction process can be significantly streamlined.

According to the method according to claims 2 to 4,
It is possible to strengthen the joints between the joints, and in this way it becomes possible to construct a variety of ships that meet various needs.

Thus, according to the method of the present invention, the construction process for small vessels can be significantly streamlined.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram conceptually showing a ship constructed by the method of the present invention and a block body for constructing it, Fig. 2 is a schematic diagram conceptually showing the method of the present invention, and Fig. 3 is an implementation example. Figure 4 shows the cross-section of the I8 ship constructed by the method described above, and Figure 4 shows the various networks of the connection structure of the outer panels that make up the block body. 10 nib [1 piece body 12; longeron 22:11 joint structure between outer plates forming cock body 22G
, 28: Flange 30. 32: Partition wall

Claims (4)

[Claims] (1) A method for constructing a small ship, which includes a step of producing a block body divided into a size that can be transported by land, a step of transporting the block body by land to a ship construction site, and a step of transporting the transported block body. A method of constructing a small boat, the method comprising: joining each other to form a hull of the small boat. (2) The method for constructing a small boat according to claim 1, wherein the transported block bodies are bonded together to form a hull of the small boat, and the outer skin material of the block bodies is used to form the block body. A method of constructing a small ship that includes the step of forming a bone structure to ensure strength at the boundary of the vessel. (3) The method for constructing a small ship according to claim 1, further comprising the step of fixing a stringer extending across a plurality of blocks in the longitudinal direction of the ship at a ship construction site, the method comprising: A method of constructing a small boat, the method comprising: joining a block body to the stringer to form a hull of the small boat. (4) The method for constructing a small boat according to claim 1, wherein the block body is divided at a bulkhead position of the boat.