JP2000168679A - Box type barge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a box type barge which generates large resistance force against a lateral load, hardly causes drift and turn even when the lateral load is received, has high stability, and facilitates ship control for mooring a ship alongside the pier. SOLUTION: This box type barge is not provided with power for self sailing, pushed by a ship to sail, further with the outside of a ship body 1 in almost box shape, and floating with most of the ship body 1 and almost a bow on the water surface when a hold is placed in a condition empty or near empty. At least a protrusive unit 10 functioning as a resistance unit in the water against a lateral load to the ship body 1 is provided to protrude toward the forward in a lower surface of the bow A, and the protrusive unit 10 is arranged so as to be submerged under the water surface even when most of the ship body 1 and almost the blow are floated on the water surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box-type barge used for transporting sediment loaded from a port loading facility or a dredger for the construction of an artificial island, reclamation of a shore, revetment foundation work, and the like.

[0002]

2. Description of the Related Art A box-type barge is used for transporting sediment loaded from a port loading facility or a dredger for the construction of an artificial island, reclamation of a shore, and the construction of a seawall. As shown in FIG. 8, a box-shaped hold 2 for loading earth and sand is provided. In addition, unlike a normal ship, the outer shape of the hull 1 is formed in a substantially box shape so as to minimize the wave resistance during traveling.

[0003] Therefore, the bow A also has the same width in the left-right direction as that of the central part, and only in the height direction, the bottom C rises forward so as to reduce the wave resistance, and is viewed from the side. , Is tapering. In addition, it does not have an engine, a screw, a rudder, etc. for self-propelling, and has a recess 3 for fitting the bow of the push boat to the stern B so as to be pushed and moved by the push boat (not shown). Is provided. In addition,
Although some facilities other than the above exist, they are not directly related to the present invention, and thus description thereof is omitted.

[0004]

However, when the conventional box-type barge is full of earth and sand, the draft is deep (draft line L1), most of the hull 1 is below the surface of the water, and the lateral load (for example, crosswind) is reduced. Even if received, the underwater part that resists it is large and the hull 1 is hardly swept aside,
When the hold 2 is empty or a light load close to it, the draft is extremely shallow (draft line L2), most of the hull is on the surface of the water, and the hull receives side winds and the like, and the straightness is impaired, for example, when the hull is swept away. There are cases.

Further, when this lateral load acts on the bow A which is farthest from the center of gravity of the hull, a moment for rotating the hull 1 is generated. Since there is no or very little, there is a problem that the hull 1 is rotated around the center of gravity even if the crosswind is weak without weakening. Therefore, a box-type barge that does not have a self-propelling function and can travel only by a push boat is difficult to lay on a work boat (not shown) for loading due to the above-mentioned lateral flow, rotation, and the like. In such a case, it is necessary to repeat forward and backward movements and maneuver the ship until the ship can be laid sideways, and there is a problem that it is difficult to maneuver the ship for the laying side.

Accordingly, an object of the present invention is to overcome the disadvantages of the conventional box-type barge, to provide a large resistance to lateral loads, to be less likely to cause lateral flow and rotation, to have high stability, and to be able to secure the horizontal mounting. To provide a box-type barge which is easy to maneuver.

[0007]

In order to achieve the above object, a box-type barge according to the first aspect of the present invention does not have a power for self-propelling, and is pushed by a push boat to travel, and furthermore, a hull (1). ) Is a box-shaped barge in which most of the hull (1) and most of the bow float on the water surface when the outer shape of the hull (2) is substantially empty or almost empty, and the bow (A) At least one protruding body (10), which functions as a resistance body in water against a lateral load on the hull (1), is provided on the lower surface so as to protrude forward, and the protruding body (10) is provided. ) Is characterized in that most of the hull (1) and most of the bow are arranged so as to be submerged under the water surface even when they float on the water surface.

The box type barge according to the second aspect of the present invention does not have any power for self-propelling and runs while being pushed by a push boat, and furthermore, the outer shape of the hull (1) is substantially box-shaped and the hold (2) is formed. A box-type barge in which most of the hull (1) and most of the bow floats on the water surface when in the sky or near the sky, and the lower surface of the bow (A) is provided with a lateral load on the hull (1). At least two or more projections (20), which function as resistors in water underwater, are protruded forward in a state of juxtaposition, and the projections (20) are provided on the hull (1). It is arranged to be submerged under the water surface even when most of the bow and most of the bow rise above the water surface, and furthermore, the projections (20, 20)
The space is connected by a reinforcing material (22).

The lateral load is a load, such as wind, which acts on the side surface of the hull (1) substantially perpendicularly. Is also included.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the protruding body (10) is substantially plate-shaped, and its plate surface is substantially perpendicular to the running direction. It is characterized by being arranged to face.

The symbols in parentheses indicate corresponding elements or items described in the drawings and the embodiments of the invention described later.

According to the first aspect of the present invention, when the hold is in the sky or near the sky, the projecting body acts as a resistor underwater against a lateral load while remaining submerged below the water surface. The resistance to the lateral load of the entire hull is increased, and the degree of loss of straightness, such as lateral flow, is reduced. Furthermore, the lateral load moment on the bow that mostly floated above the water surface does not increase compared to that of the conventional example, and most of it is attenuated by the resistance moment of the projecting body that remains submerged under the water. Even when the moment is reduced and a cross wind or the like is received, the rotation of the hull around its center of gravity is suppressed.

[0013] Therefore, the box-type barge suppresses lateral flow, rotation, and the like even if it receives a lateral load such as a lateral wind, so that it is easy to maneuver for horizontal loading when loading on a work boat (not shown). Become. The protruding body only needs to protrude forward so as to become a resistor, so that the structure is simple and inexpensive, and it can be manufactured by welding a steel plate to the existing conventional example.

According to the second aspect of the present invention, in addition to the functions and effects of the first aspect of the present invention, two or more protruding bodies projecting forward in a parallel state are connected by a reinforcing material. Therefore, the resistance to the lateral load is further increased.

According to the third aspect of the present invention, the projecting body is substantially plate-shaped, and the plate surface is disposed so as to face left and right substantially perpendicular to the traveling direction. In addition to the advantageous effects of the invention, since the resistance of the push boat when traveling straight is minimized, the speed during traveling straight and the required power are not increased.

[0016]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a bow portion of a box-type barge according to the first embodiment of the present invention,
FIG. 2 is a plan view thereof, and FIG. 3 is a front view thereof. The same parts as those in the conventional example are denoted by the same reference numerals.

The box-type barge according to the first embodiment of the present invention is configured as follows. That is, unlike a normal ship, which is formed so as to minimize the wave resistance during traveling, the outer shape of the hull 1 is formed in a substantially box shape, and a box-shaped hold 2 for loading earth and sand is provided. Have. Moreover,
When the hold 2 is empty or a light load close to the sky, most of the hull 1 and most of the bow A float on the water surface.

Accordingly, the width of the bow A in the left-right direction is not different from that of the central portion, and only in the height direction, the bottom C rises forward and becomes narrow so that the wave resistance is reduced. . In addition, it does not have the power of the engine, screw, rudder, etc. for self-propelling, and it is necessary for the bow of the push boat to be fitted to the stern, as in the conventional example, so as to be pushed and moved by the push boat. A recess 3 is provided. In addition, there are some other facilities other than the above, but they are not directly related to the present invention, and therefore, the description is omitted (all are the same as the conventional examples).

At least one (FIG. 1)
3 to 1 (in FIG. 4, two in FIG. 4) protruding forward. The projecting body 10 is arranged so as to be submerged under the water surface even when most of the hull 1 and most of the bow A float on the surface of the water. It is designed to function as.

In addition, the protruding body 10 is basically formed in a substantially plate-like shape so that the resistance when traveling straight is minimized and the speed is not reduced and the required power is not increased. Is required to be disposed so as to face left and right substantially at right angles to the traveling direction. However, as shown in the figure, a tapered cross section is preferable in consideration of mounting, strength, and the like. Moreover, in order to make it difficult for the portion 11 above the draft line L2 when the hold 2 is empty to receive a cross wind or the like, it is desirable to make the portion as small as possible as shown in the figure. It should be noted that welding and welding to the bow A are preferably performed in terms of workability and cost.

According to the box-type barge constructed as described above, when the earth and sand are full, the draft is deep (draft line L1), and most of the hull 1 including the projecting body 10 is below the surface of the water. Even if a load (for example, a crosswind) is received, a portion below the water surface that resists the load is large, and the hull 1 is hardly swept or rotated. On the other hand, when the hold 2 is empty or in a state of light load close to the sky (draft line L2), the part floating above the water surface of the bow A is in the same state as the conventional example, but the projecting body 10 is not. Since it acts as a resistor in the water against the lateral load while immersed under the water surface, the resistance to the lateral load of the entire hull 1 increases accordingly. For example, the degree of loss of straightness is reduced.

Further, when most of the bow A floats on the surface of the water, the bow A is furthest from the center of gravity of the hull 1 and has the longest arm.
Of the lateral load does not increase compared to the conventional example, and most of the moment is reduced by the large resistance moment of the projecting body 10 which remains submerged under the water surface. However, the rotation of the hull 1 around its center of gravity is suppressed.

Accordingly, a box-type barge having no self-propelling function and capable of moving only by a push boat is
Even if a lateral load such as a lateral wind is received, lateral flow, rotation, and the like are suppressed and reduced, so that when loading on a work boat (not shown), maneuvering for horizontal mounting becomes easy. In addition, the protrusion 1
Since 0 only needs to protrude forward so as to be a resistor, the structure is simple and inexpensive, and it can be manufactured by welding or the like to the existing conventional example.

The second embodiment will be described with reference to FIGS. 5 and 6.
0 protrude toward the front in a state of being juxtaposed. The projecting members 20 are respectively suspended from the lower surfaces of the distal ends of the bows A by the suspending members 21. The five projecting members 20 and the suspending members are reinforced in the horizontal direction so as not to be deformed when subjected to a lateral load. The members 22 are firmly connected to each other. It is necessary that the reinforcing member 22 has a sufficient strength and a dimension and a cross-sectional shape (for example, a cross section that is flat in the vertical direction) and the like so as to minimize resistance to straight traveling. In addition, the above-mentioned hanging members 21 also need to be formed so as to have sufficient strength, to be hard to receive a cross wind or the like, and to be as resistant as possible to going straight (for example, the diagonal lines are in the front-rear and right-left directions). Parallelogram cross section). As in the first embodiment, when the majority of the hull 1 and most of the bow A float on the surface of the water, the protruding body 20 is, of course, submerged under the surface of the water and the lateral load on the hull 1 is reduced. On the other hand, it is arranged to function as a resistor in water.

According to this, since the projecting body 20 is extended forward, when the hold 2 is empty or a light load close to it (draft line L2), the bow is lower than in the first embodiment. The portion of the A floating above the water surface hardly increases, but since the area of the projecting body 20 submerged below the water surface can be further increased, the resistance to the lateral load of the entire hull 1 further increases, and Even if a load (for example, a crosswind) is received, the degree of the loss of straightness, such as a lateral flow, is further reduced.

Also, when most of the bow A rises above the water surface, the lateral load moment on the bow A, which is farthest from the center of gravity of the hull 1 and has the longest arm, increases almost as compared with that of the first embodiment. do not do. On the other hand, the protruding body 20 itself immersed under the water surface is extended with both arms, and the synergistic effect thereof significantly increases the resistance moment. Therefore, the lateral load moment on the bow A is greatly reduced by the extended projection 20. Therefore, the turning moment with respect to the hull 1 is greatly reduced, and the turning of the hull 1 around its center of gravity is greatly suppressed even if it receives a cross wind or the like.

Therefore, even when a lateral load such as a cross wind is received, lateral flow, rotation, etc. are further suppressed and reduced. Become. In addition, although the structure of the projecting body 20 is slightly complicated, the cost for the effect may be reduced but not increased. As in the first embodiment, the projection 20, the suspension member 21, and the reinforcing member 22 are simply attached to the existing conventional example by welding or the like, so that the second embodiment can be easily and inexpensively manufactured. Convertible.

[0028]

As described above, according to the first aspect of the present invention,
When the hold is empty or close to the sky, the projecting body remains submerged under the surface of the water and acts as a resistor in the water against lateral loads, so the resistance to the lateral load of the entire hull increases accordingly. The degree to which straightness is impaired, such as lateral flow, is reduced. Furthermore, the lateral load moment on the bow that mostly floats above the water surface does not increase compared to that of the conventional example, and most of it is attenuated by the resistance moment of the projecting body that remains submerged under the water. Even when the moment is reduced and a cross wind or the like is received, the rotation of the hull around its center of gravity is suppressed. Therefore, even if the box-type barge receives a lateral load such as a lateral wind, lateral flow, rotation, and the like are suppressed, so that when a work barge (not shown) is loaded, maneuvering for horizontal mounting is facilitated.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, two or more projecting members projecting forward in a parallel state are connected by a reinforcing member. Therefore, the resistance to the lateral load is further increased.

According to the third aspect of the present invention, the projecting body is substantially plate-shaped, and the plate surface is disposed so as to face left and right substantially perpendicular to the traveling direction. In addition to the advantageous effects of the invention, since the resistance of the push boat when traveling straight is minimized, the speed during traveling straight and the required power are not increased.

[Brief description of the drawings]

FIG. 1 is a side view showing a bow portion of a box type barge according to a first embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a front view showing another embodiment of the box-type barge according to the first embodiment of the present invention.

FIG. 5 is a side view showing a bow portion of a box-type barge according to a second embodiment of the present invention.

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a plan view showing a box-type barge according to a conventional example.

FIG. 8 is a side view of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hull 2 Hold 3 Concave part 10 Protrusion 11 Upper part 20 Protrusion 21 Suspension member 22 Reinforcement A Bow B Stern C Bottom LI Draft line at full load L2 Draft line at empty

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masanori Takase 5-1 Enamiokicho, Naka-ku, Hiroshima City Inside MCS Engineering Services Co., Ltd. (72) Inventor Meiji Tanimoto 5-1 Emiokicho, Naka-ku, Hiroshima City Engineering Service Co., Ltd.

Claims (3)

[Claims] When a ship is pushed by a push boat without power for self-propelling, and when the hull has a substantially box-like outer shape and the hold is empty or nearly empty, most of the hull and most of the bow are provided. Is a box-type barge that floats on the water surface, and at least one protruding body that functions as a resistance body underwater against a lateral load on the hull is provided on the lower surface of the bow so as to protrude forward. A box-shaped barge, wherein the projecting body is disposed so as to be submerged under the water surface even when most of the hull and most of the bow float on the water surface. 2. When most of the hull and most of the bow are in a state where the hull is pushed by a push boat without power for self-propelling, and the outer shape of the hull is substantially box-shaped and the hold is empty or nearly empty. Is a box-type barge that floats above the water surface, and at the bottom of the bow, at least two or more protruding bodies that function as a resistance body in water against lateral loads on the hull The projecting body is disposed so as to be immersed below the water surface even when most of the hull and most of the bow float on the surface of the water, and furthermore, there is no space between the projecting bodies. A box-shaped barge which is connected by a reinforcing material. 3. The box type according to claim 1, wherein the projecting body is substantially plate-shaped, and the plate surface is arranged so as to face right and left substantially perpendicular to a traveling direction. Barge.