JPS60157977A - Bow structure of ship equipped with bow ramp for car - Google Patents

Abstract

PURPOSE:To secure the sufficient width of a hull without reducing each tilt of bow and a bottom lower-part outer-plate by setting the tilt angle of bow at 57 deg. or more and setting the tilt angle of the bottom lower-part outer-plate at 35 deg. or more and forming a knuckle onto the lower-part outer-plate part at a car deck level and connecting said knuckle to the hull upper-part outer-plate. CONSTITUTION:The tilt angle theta of bow is set at 57 deg., ore more, and the upper edge of a lower-part outer-plate part 31 which constitutes a bottom outer plate 3 is positioned below a car deck level 2, and the tilt angle alpha is set at 35 deg. or more. A circular part (a) is formed at the upper-edge side part of the lower-part outer- plate part 31 and a knuckle part K is formed at the lower part of the upper-part outer-plate part 32 which consttutes the bottom outer plate 3 and connected to the upper edge of the lower-part outer-plate part 31. the tilt theta of bow and the tilt alpha of the outer-plate in the bow part are reduced, and the breakage of the hull outer-plate due to the lapping of waves is prevented, and a sufficient width of the hull for securing the bow ramp for cars can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a boat light structure for a ship equipped with a private backlight.

As shown in Figure 4, some high-speed passenger ships are equipped with a wide rose lamp (1) at the bow for the entrance and exit of automobiles. Since the width of the car deck (2) must be commensurate with the width of the car deck, it is necessary to ensure an appropriate width of the ship at the car deck level.

In response to these demands, the ship width L (see Fig. 5) is secured by reducing the bow heel angle θ shown in Fig. 4 and extending the upper part of the bow forward, or the As shown in the figure, it is structurally possible to secure the hull width by reducing the inclination angle d of the outer plating (3) at the bow; If the slope of the hull is made small, it is not preferable because it may cause damage to the hull's hull due to waves hitting the ship.

The present invention was devised in view of these five conventional problems, and provides a structure that can secure the necessary width at the bow without reducing the bow slope or the hull slope at the bow. There's something I want to do.

Therefore, in the present invention, the bow inclination angle is set to 57 degrees or more, and the upper end of the lower skin part forming the hull skin is located below the car deck level, and the part excluding the upper end side part is 35 degrees. In addition to configuring the structure to have the above inclination angle, an arc is provided on the upper end side portion, and the upper outer panel part forming the hull outer panel is connected to the upper end of the lower outer panel part while forming a knuckle). Its basic characteristics.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In the present invention, the outer plate Ml including the bow inclination and the hull outer plate inclination
The bow structure (shape) is particularly important for two aspects of sound. First, as shown in Figure 1, the angle θ of the bow inclination is 57.
° or more. In order to reduce bow impact pressure during waves, it is necessary to increase the angle of this bow inclination, and it is generally known that impact pressure can be effectively reduced by setting θ≧57°. 0 Furthermore, regarding the shape of the hull shell at the bow, the hull shell (
The lower outer panel part (31) constituting 3) is arranged so that its upper end is located below the level of the car deck (2), and the inclination angle α of the part excluding the upper end side part (a) is ◇In order to reduce the impact pressure during waves, it is necessary to increase the slope of the hull skin of the ship so that the angle is 35° or more.In general, when α≧35°, the impact pressure becomes effective. It is known that it can be significantly reduced.

The upper end 1111 portion (1) is provided with a circular arc with a small radius, so that this portion (a) has a lower portion (α≧
It has a shape that extends outward from the hull with respect to the 35° angle. It is preferable that the radius of the circular arc is as small as possible.

On the lower skin part (31), an upper skin part (31) is formed such that a knuckle (K) is formed at the upper end thereof.
32) are installed in series. In other words, this upper outer plate portion (32) is also configured with an inclination angle of 35° or more, and as a result, the knuckle (
K) will be formed. This knuckle (K) is formed at a level below the car deck level.

In addition, in FIG. 3, (A) shows the planar shape of the bow part.

In the bow structure of the present invention as described above, the bow inclination and the main inclination of the hull shell plate are set at a predetermined angle or more to reduce the g-force during waves.
iJ impact force can be effectively reduced and damage to the outer skin etc. can be prevented, and the upper end portion (a) with an arc and the knuckle (K
) Tonyo L It is possible to secure sufficient ship width at the car deck level near the FP position.

According to the present invention described above, it is possible to secure a sufficient width of the ship at the car weight level at the bow while ensuring the bow inclination and the bow part outer plate inclination to reduce the impact pressure caused by waves. It has this excellent effect.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention,
Fig. 1 is a side view, Fig. 2 is a sectional view taken along line nn in Fig. 1,
Figure 3 is a cross-sectional view taken along the same <m-m line. ◇ Figures 4 and 5 show the conventional bow structure; Figure 4 is a side view;
FIG. 5 is a sectional view taken along line nn in FIG. 1. In the figure, (1) is the back lamp, (2) is the car deck, (3) is the hull shell, (31) is the lower shell, and (32) is the hull shell.
) shows the upper outer plate part, (a) shows the upper end side part, and (K) shows the knuckle. Patent Applicant: Nippon Kokan Co., Ltd. Inventor: Hiroshi Nakanishi - Hiroshi Shiroki, Patent Attorney: Sho Yoshihara, Sando, Seido Takahashi, Attorney: Hiroko Yoshihara

Claims (1)

[Claims] The bow inclination angle is 57° or more, the upper end of the lower skin part that makes up the hull skin is located below the car deck level, and the part excluding the 815 minutes on the upper end side has an inclination angle of 35° or more. The upper end 101
Bow structure of a ship equipped with a rose lamp for automobiles, in which an arc is provided in one part, and the upper outer plate part forming the hull outer plate is connected to the upper end of the lower outer plate part while forming a knuckle.