JPH11227681A - Bottom-hopper type earth carring barge common to bottom closed type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth carrier vessel whose effective capacity of a hold does not decrease, which does not require a complicated moving mechanism when it is converted from the bottom open type to closed type, and can be embodied in a very simple mechanism. SOLUTION: The angle of one inclining side wall 3 constituting a hold 2 to a horizontal plane is smaller than the angle of the other inclining side wall 4 to horizontal plane, and the height over the hull bottom strake 7 of the bottom 3a of the side wall having a smaller angle is made greater than that over the hull bottom strake 7 of the bottom 4a of the side wall having larger angle. Between the bottoms of the two side walls 3 and 4, one row of earth and sand exhausting openings 8 are formed along the center line of the bottom of the hold 2, and the bottom plate 16 directed toward the lower part of the side wall 4 is installed movably in inclination in the lower part of the side wall 3 while a bottom plate supporting groove 20 to admit insertion of the forefront of the bottom plate 16 is formed in the lower part of the side wall 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom-opening / sealing type earth transport vessel used for reclaiming and dredging.

[0002]

2. Description of the Related Art For example, a land-opening / sealing type earth transport vessel is used for reclamation work in water areas. In this bottom-opening / sealing combined use type earthing ship, an opening having a door that can be opened and closed is provided at the lower end of the hold that holds the earth and sand, and the earth and sand are loaded in the hold with the door closed, and the landfill is used. Open the door and dump the loaded earth and sand into the sea, and if land reclamation advances to some extent and the water depth becomes shallow and direct dumping becomes impossible, close the door and excavate using a shovel etc. Is available.

FIG. 4 is a schematic cross-sectional view showing an example of a conventional bottom-opening / sealing type earth transport vessel disclosed in Japanese Utility Model Laid-Open No. 61-14195. As shown in FIG.
A center girder 21 having a triangular top is provided along a bottom center line of the hold 2 for holding earth and sand, which is located below the deck 5 of the ship. In the bottom surface of the container 2, openings 23 and 23 ′ for discharging earth and sand contained in the hold 2 are provided in two rows in parallel.

Openings 23 and 23 'are formed at the lower end of the center beam 21.
Doors 24 and 24 ′ for opening and closing the door are each hinged by hinges 25. A chain 26 is attached to the front ends of the doors 24 and 24 ′, and the other end of the chain 26 is connected to the deck 5.
It is attached to a winding mechanism 27 provided above.

When the chain 26 is wound up by the winding mechanism 27, the doors 24 and 24 'are pivoted about the hinge 25 and lifted up to close the openings 23 and 23'. In this manner, earth and sand are loaded in the hold 2 with the openings 23, 23 'closed by the doors 24, 24' and transported to a position in the water area where landfill is required. Next, when the chain 26 is loosened by the winding mechanism 27, the doors 24 and 24 'open, and the hold 2
The sediment loaded inside is dumped into water.

The triangular top of the center girder 21 having a triangular top is made up of two diagonal left and right inclined walls 28 and 28 '. When used as a sealed earth carrier, it is shown in FIG. As described above, the inclined wall bodies 28 and 28 'forming the triangular apex are formed in a horizontal shape, and the hold bottom plate sealed by the horizontal inclined wall bodies 28 and 28' and the spar upper surface 29 is formed.

[0007] In addition, as a bottom-opening / sealing dual-purpose ship,
In addition to the above, as disclosed in, for example, JP-A-8-48283 and JP-A-8-133176, a center girder having a triangular top is also provided along the bottom center line of the hold. In the bottom between the center girder and the side wall of the hold, two openings for discharging the earth and sand contained in the hold are provided.
When used as a sealed earth carrier, there is a structure in which a side wall of a hold is used as a bottom plate of a closed type hold.

[0008]

SUMMARY OF THE INVENTION
In any of the closed-type earth carriers, the sediment loaded in the hold 2 is smoothly discharged from two rows of bottom openings 23, 23 ', and the doors 24, 24 for opening and closing the openings 23, 23' are all provided. In order to make it easier to mount the ', a center girder 21 having a triangular top is provided in the hold 2 along the center line of the bottom. For this purpose, the projecting central girder 21
It is inevitable that the effective volume in the hold 2 is reduced.

Further, in the case of a dual-purpose earthing ship disclosed in Japanese Utility Model Application Laid-Open No. 61-14195, etc., when changing to a closed-type earthing ship, the right and left sides of the center girder 21 forming the triangular top are formed. The moving range for making the inclined walls 28, 28 'horizontal and forming a bottom plate is large, and the moving mechanism is extremely complicated. In the case of a dual-purpose ship disclosed in JP-A-8-48283 and the like, when changing to a closed-type ship,
The movement of the bottom plate is large and its movement mechanism is complicated.
The effective volume of the closed type is greatly reduced.

[0010] Therefore, the present invention solves the above-mentioned problems, does not reduce the effective volume in the hold, and requires complicated moving when changing from an open-bottomed earthing vessel to a closed-type earthing vessel. It is an object of the present invention to provide a bottom-opening / sealing type earth transport vessel that does not require a mechanism and can perform this by an extremely simple mechanism.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a bottom-opening / sealing method in which an openable / closable opening for discharging earth and sand in the hold is formed at a lower end of a hold formed of inclined walls for housing earth and sand. In the dual-purpose earth carrier, the inclination angle of one of the inclined side walls constituting the hold is smaller than the inclination angle of the other inclined side wall of the horizontal side, and the inclination angle is smaller. The height of the lower end of the inclined side wall from the hull bottom outer plate is larger than the height of the lower end of the other inclined side wall having the larger inclination angle from the hull bottom outer plate, and the lower end of the one inclined side wall and the lower end Between the lower end of the other inclined side wall, an opening for discharging the earth and sand in the hold is formed in a line along the center line of the hull bottom, and at the lower end of the one inclined side wall. The door for opening and closing the opening can be turned In the lower part of the one inclined side wall, a bottom plate penetrating therethrough and directed to the lower part of the other inclined side wall is provided movably inclined downward, and the one inclined side wall is provided. A support table which supports the bottom plate is provided on the inner side of the inclined side wall, and a bottom end of the bottom plate is inserted under the other inclined side wall to support the bottom plate. The feature is that the groove is formed.

[0012]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an example of a bottom-opening / sealing type earth transport ship of the present invention. As shown in the drawing, a hull 1 composed of a deck 6, a hull side skin 7, and a hull bottom skin 8, below the deck 6, is formed by inclined side walls 3, 4 having different inclination angles. There is provided a hold 2 for accommodating.

The angle θp formed by one inclined side wall 3 (in the illustrated example, on the port side) with the horizontal plane is the angle θ formed by the other inclined side wall 4 (in the illustrated example, on the starboard side).
It is smaller than s. The height hp of the lower end 3a of the one inclined side wall having a small inclination angle θp from the outer shell 7 of the hull bottom is the lower end 4a of the other inclined side wall having a large inclination angle θs.
Is larger than the height hs from the hull bottom outer plate 7.

The inclination angle and the hull bottom outer plate 7
Between the lower end 3a of the inclined side wall 3 and the lower end 4a of the inclined side wall 4 at different heights along the bottom center line of the hold.
Rows of openings 8 are formed. Reference numeral 9 denotes a door for opening and closing the opening 8, and an upper end of the door 9 is hinged to a lower end 3a of one of the inclined side walls 3 by a hinge 10.

The earth and sand discharge passage 13 extending from the lower end 3a of the one inclined side wall 3 and the lower end 4a of the other inclined side wall 4 to the hull bottom outer plate 7 is formed to be divergent by the inclined surfaces 11, 12. The inclined surface 12 which forms the earth and sand discharge passage 13 and extends from the lower end 4a of the other inclined side wall 4 to the hull bottom skin 7 is on an extension of the one inclined side wall 3 to which the door 9 is attached. It is inclined. Therefore, the door 9 attached to the lower end 3a of the one inclined side wall 3 is closed,
The lower surface of the inclined surface 1 that constitutes the earth and sand discharge passage 13
By making contact with 2, the opening 8 is closed.

As a driving means for rotating the door 9 attached to the lower end 3a of the one inclined side wall 3 about the hinge 10, for example, a chain 14 is attached to the lower end of the door 9 as shown in the figure. The chain 14 can be driven by any means such as a chain drive for winding and rewinding by a winding mechanism 15 provided on the deck 5 on the side of the other inclined side wall 4 and a hydraulic cylinder drive.

A bottom plate 16 penetrating through the lower portion of one of the inclined side walls 3 and directed to a lower portion of the other inclined side wall 4 can be inclined downward by a predetermined angle (α) toward the other inclined side wall 4. It is provided in. A bottom plate 16 is provided inside the inclined side wall 3.
Is provided at a predetermined angle (α), and a winding device 19 for winding and rewinding the wire 18 attached to the base end of the bottom plate 16 is provided on the support 17.
Is installed. Also, in the lower part of the other inclined side wall 4,
The bottom end of the bottom plate 16 is inserted and a bottom plate support groove 20 for supporting the bottom end is formed.

Accordingly, the wire 1 is wound by the winding device 19.
By winding up the bottom plate 8, the bottom plate 16 attached to the leading end thereof is housed inside one of the inclined side walls 3 by the support base 17, and is held on the support base 17 by a stopper (not shown).

The wire 18 by the winding device 19
As shown in FIG. 3, the bottom plate 16 moves linearly on the support 17 inclined by the gravity, and the tip end is provided at the lower part of the other inclined side wall 4 as shown in FIG. It is inserted into the bottom plate support groove 20. Thus, the hold 2 is sealed by the bottom plate 16.

As shown in FIG. 1, when used as a bottom-opening type earth carrier, a bottom plate 16 on a support base 17 is housed in one of the inclined side walls 3, and a chain is taken up by a winding mechanism 15. The opening 14 of the hold 2 is closed by winding the lower part of the door 9 and bringing the lower part of the door 9 into contact with the inclined surface 12 constituting the passage 13 for discharging earth and sand. In this state, earth and sand are loaded in the hold 2 and transported to a place in the water area to be reclaimed. Next, by unwinding the chain 14 by the winding mechanism 15, as shown in FIG. 2, the door 9 is turned to a vertical state, the opening 8 is opened, and the earth and sand in the hold 2 is dumped into water. You.

When used as a sealed earth carrier, FIG.
As shown in the figure, the opening 8 of the hold 2 is closed by the door 9,
Then, the winding of the wire 18 by the winding device 19 is loosened, the bottom plate 16 is moved, and its tip is inserted into the bottom plate support groove 20 provided at the lower portion of the other inclined side wall 4 to seal the hold 2. . As described above, the minimum movement of the bottom plate 16 causes a small decrease in the effective volume of the hold 2 and makes it possible to provide a sealed earth carrier with a simple operation.

In the illustrated example, one inclined side wall is on the port side, and the other inclined side wall is on the starboard side. However, this is reversed, and one inclined side wall is on the starboard side, and the other inclined side wall is on the port side. Of course, the side may be used.

The bottom-opening / sealing combined-use type earthing ship of the present invention is configured as described above.
No center girder having a triangular top is provided along the bottom centerline of the hold 2, and only one row of openings 8 for discharging earth and sand is provided along the bottom centerline of the hold 2. . Therefore, the reduction of the effective volume in the hold 2 is extremely small and the area of the closed type hold bottom plate is small even when the earth transport ship is used as an open bottom type or as a closed type. Furthermore, the amount of movement of the bottom plate when changing from the open bottom type to the closed type can be minimized, and the landfill construction progresses,
At the stage when the water depth becomes shallow, the earth and sand in the hold 2 can be efficiently unloaded by a shovel or the like without causing any trouble in the operation as a closed type earth carrier.

[0024]

As described above, according to the present invention,
The effective volume in the hold of an earth transport vessel is reduced, and the mechanism for use as a closed type earth transport vessel is simple, the effective area in the hold is reduced, and the earth and sand in the hold is shoveled. In the case of unloading using, there is provided an industrially useful effect such that the work is not hindered and the earth and sand in the hold can be discharged smoothly.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a closed state of a door when an earth transport ship of the present invention is used as an open bottom type.

FIG. 2 is a schematic cross-sectional view showing a door open state when the earth transport ship of the present invention is used as a bottom-open type.

FIG. 3 is a schematic cross-sectional view when the earth-moving ship of the present invention is used as a sealed earth-moving ship.

FIG. 4 is a schematic cross-sectional view when used as a bottom-opening type of a conventional bottom-opening / sealing combined use type soil carrier.

FIG. 5 is a schematic cross-sectional view when used as a closed type of a conventional bottom-opening / sealing dual-use ship.

[Explanation of symbols]

 Reference Signs List 1 hull 2 hold 3 inclined side wall 4 inclined side wall 5 deck 6 hull side outer plate 7 hull bottom outer plate 8 opening 9 door 10 hinge 11 inclined surface 12 inclined surface 13 soil discharge passage 14 chain 15 winding mechanism 16 bottom plate 17 support Table 18 Wire 19 Take-up device 20 Bottom plate support groove 21 Center girder 22 Hold side wall 23 Opening 24 Door 25 Hinge 26 Chain 27 Take-up mechanism 28 Sloping wall 29 Top of girder

Claims (1)

[Claims] 1. A bottom-opening / sealing type earth transport ship, wherein an openable and closable opening for discharging earth and sand in the hold is formed at a lower end of a hold made of inclined side walls for storing earth and sand, The angle of inclination of one of the inclined side walls forming the hold is smaller than the angle of inclination of the other inclined side wall of the horizontal plane, and the lower end of the one inclined side wall having the smaller angle of inclination is the hull bottom. The height from the outer plate is greater than the height from the hull bottom outer plate of the lower end of the other inclined side wall having the larger inclination angle, and the lower end of the one inclined side wall and the lower end of the other inclined side wall are different from each other. Openings for discharging the earth and sand in the hold are formed in a row along the center line of the hull bottom, and at the lower end of the one inclined side wall, the opening for opening and closing the opening is formed. The door is rotatably mounted on a shaft, In the lower part of the one inclined side wall, a bottom plate penetrating therethrough and directed toward the lower part of the other inclined side wall is provided so as to be inclined downward and movable, and inside the one inclined side wall, A support plate that supports the bottom plate is provided. The support plate is provided with a downwardly inclined support base, and a bottom plate support groove is formed at a lower portion of the other inclined side wall to receive a tip end of the bottom plate and support the bottom plate. Characteristic, open / closed combined use earth-moving ship.