JPH10109687A - Bottom-hopper and box type earth carrying barge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the change of a hold internal capacity and improve the earth dropping performance in the use as a bottom-hopper type earth carrying barge by providing a movable door which forms the hopper swash plate of a bottom-hopper type earth carrying barge when rotated upward, and forms the horizontal hold inner bottom of a box type earth carrying barge when rotated downward. SOLUTION: In the use as a bottom-hopper type earth carrying barge, hold covers 10, 11 are rotated upward to form the swash plate of a center line hopper by the hold covers 10, 11. Bottom-hopper doors 8, 9 are opened and close to laterally uniformly put the earth and sand loaded in a hold along the hopper swash plate and both side walls 6a, 7a. Since the hold covers 10, 10 themselves form the center line hopper, the hold inner bottom can be lowered in the use as a box type earth carrying barge. On the other hand, in the use as the box type earth carrying barge, the hold covers 10, 11 are rotated downward, the upper surfaces of the hold covers 10, 11 are flushed with the upper surface of a lower frame 5 to form a smooth surface. Thus, in both the cases, substantially the same hold inner capacity can be ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom-opening and box-type soil carrier which can be used as a bottom-opening type soil carrier and a box-type soil carrier.

[0002]

2. Description of the Related Art Conventionally, as a so-called earth transport ship for transporting earth and sand,
Box soil carriers and bottom-open soil carriers are generally known.
By the way, the box-type earth transport ship has a structure in which a flat inner bottom of the hold is provided so that the earth and sand loaded in the hold can be easily taken out by a back fork. On the other hand, an open-bottomed earth transport ship has a pair of symmetrical rotating doors at the bottom inside the hold, and has a shape with a hopper swash plate in the center. The structure is such that it can be dropped down from the inner bottom. Both box-type and bottom-opening soil carriers are usually built as dedicated vessels.

[0003] In addition, those constructed as a bottom-opening and box-type soil carrier that also serves as the box-type soil carrier and a bottom-opening-type soil carrier,
There is a structure shown in FIG. As shown in the figure, in this bottom-opening and box-type earthen carrier 50, a pair of left and right sliding doors 51, 51 are provided, and when these doors 51, 51 are located on the side of the ship (indicated by the chain line in FIG. 5). When the doors 51, 51 are located on the bottom side of the hold (in the position indicated by the solid line in FIG. 5), they function as a box-type soil carrier.
When this is used as a box-type earth transport vessel, the pair of left and right bottom open doors 52, 52 is rotated from the solid line position to the chain line position, whereby the earth and sand in the hold is dropped.

[0004]

However, the conventional bottom-opening and box-type earth carrier described above has the following problems. A narrow support member 53 for attaching the bottom-open doors 52, 52 is provided at the center, and a slope 54 formed on the top of the support member 53 serves as a center hopper when used as a bottom-opening type earth carrier. Because of this structure, it is difficult to drop the loaded sediment uniformly on the left and right, and the sediment dropping performance is inferior to that of a dedicated ship. When used as a box-type earth carrier, the upper surface of the center hopper becomes the bottom of the hold, so that the bottom of the hold has to be high, and the hull becomes large in order to secure the required transport volume. When used as a box-type soil carrier, the inner bottom of the hold covers the top of the bottom-opening device. The volume change in the hold is large.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and the change in the inner volume of the hold is small even when the ship is used as an open-bottomed soil carrier or as a box-type soil carrier. Another object of the present invention is to provide a bottom-opening and box-type soil carrier capable of improving the performance of dropping sediment when used as a bottom-open soil carrier.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a bottom-opening box-type soil carrier according to the present invention is provided with a hopper slope of a bottom-opening type soil carrier when rotating upward. A plate is formed, and a movable door is formed to form a horizontal inner bottom of a box-type earth carrier when the ship is pivoted downward.

[0007] In the bottom-opening and box-type soil carrier according to the present invention, the hopper swash plate of the bottom-opening type soil carrier is formed by the movable door when the movable door is turned upward. As in the case of a dedicated ship for an open earth carrier, the earth and sand loaded in the hold can be uniformly dropped on the left and right along the hopper swash plate. In addition, since the movable door itself forms a center hopper, the inner bottom of the hold when used as a box-type earth carrier can be made lower than that of a conventional dual-purpose ship, and when the same carrying volume is used. The size of the hull can be reduced. Further, according to the movable door of the present invention, it is possible to secure substantially the same internal volume of the hold when used as an open-bottom soil carrier and as a box-type soil carrier.

In the present invention, it is preferable that the movable door is provided symmetrically and rotated by a driving means such as a hydraulic cylinder disposed on the bow side and the stern side. With this configuration, the opening and closing operation of the movable door can be easily performed from, for example, an operation room on the upper deck, and a hydraulic pressure source for driving the movable door is used to drive the bottom opening door. It can be shared with a hydraulic power source, and can be a bottom-opened box-type earth transport ship with excellent economic efficiency.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of a bottom-opening and box-type earth carrier according to the present invention will be described with reference to the drawings.

FIG. 1 is a partial perspective view of a bottom-opening and box-type soil carrier according to an embodiment of the present invention, FIG. 2 is a plan view of the bottom-opening and box-type soil carrier, and FIG. FIG. 4 is a partial enlarged view of FIG.

In the bottom-opened box-type ship carrier 1 of this embodiment, the space (hold) formed in the center of the hull 2 is divided into four parts by the three trans-bulk heads 3 in the front-rear direction. By loading earth and sand in each formed hold 4, the loaded earth and sand is transported to a required position.

Each hold 4 has a lower frame 5 at the lower center along the longitudinal direction, and side frames 6, 7 on the port side, and inner side walls 6a, 7a of these side frames 6, 7 are formed. The shape is inclined so as to be tapered toward the lower central portion, so that the earth and sand can be easily moved downward.

On both sides of the lower frame 5, bottom doors 8, 9 are pivotally supported for each hold 4 so as to be openable and closable, and these bottom doors 8, 9 are provided by hydraulic cylinders arranged on a deck. It can be opened and closed via a sprocket and a chain (both not shown). Thus, when the bottom-opening and box-type soil carrier 1 of the present embodiment is used as a bottom-opening type soil carrier, the bottom-opening doors 8 and 9 are turned to the vertical position (the position of the chain line in FIG. 3). By doing so, the earth and sand loaded in the hold 4 is dropped.

Further, above the pivotal position of the bottom opening doors 8 and 9 in the lower frame 5, warehouse covers 10 and 11 as movable doors are pivotally supported symmetrically. These inner covers 10 and 11 are respectively provided with hydraulic cylinders 12 and
The upper and lower inner frames 10 and 11 are flush with the upper surface of the lower frame 5 at the time of downward rotation (solid line positions in FIGS. 3 and 4). And is supported by receiving members 14 and 15 projecting from both side walls 6a and 7a, and a position where the tips of the inner covers 10 and 11 abut upon rotation upward (FIGS. 3 and 3). 4). With such a configuration, the inner cover 10,
Numeral 11 serves as a horizontal inner bottom when used as a box-type earth carrier when turned to a solid line position, and is used as a bottom-open earth carrier when turned to a chain line position. Hopper swash plate when sloping.

Hydraulic cylinders 12 and 13 for rotating the inner covers 10 and 11 have base ends at both side walls 6a and 7a.
And the rod ends are pivotally supported by the distal ends of links 18 and 19 which are integrally connected to pivot shafts 16 and 17 of the inner covers 10 and 11, respectively. To be covered
1 are integrally rotated. Further, these hydraulic cylinders 12 and 13 are provided with respective inner-covers 10 and 11.
, Each one on the bow side and the stern side, in other words, each hold 4 divided by the trans-bulk head 3
There are provided a total of four on each of the left and right sides.

Further, the above-mentioned bottom opening doors 8 and 9 and the inner cover 1
Since the hydraulic cylinders 0 and 11 are not operated at the same time, the hydraulic cylinders (not shown) for opening and closing the bottom opening doors 8 and 9 and the hydraulic cylinders 12 and 13 for opening and closing the inner covers 10 and 11 are common. Are driven by the hydraulic pressure from the hydraulic pressure source, thereby reducing the size of the hydraulic device.

Since the bottom-open and box-type soil carrier 1 of the present embodiment is constructed as described above, when it is used as a bottom-open type soil carrier, the covers 10 and 11 in the warehouse are positioned at the upper and lower dashed lines. When the bottom-opening doors 8 and 9 are opened and closed by the hydraulic cylinders, the swash plate of the center line hopper in the bottom-opening type soil carrier is formed by the inside-covers 10 and 11 when the bottom-opening covers 10 and 11 are rotated. The earth and sand loaded therein can be uniformly dropped on the left and right along the hopper swash plate and the side walls 6a, 7a. In addition, this warehouse inner cover 10,1
1 itself forms a centerline hopper, so that the inner bottom of the hold when used as a box-type earth transport vessel can be made lower than that of a conventional dual-purpose ship, and the hull can be used for the same transport volume. Can be reduced in size.

On the other hand, when the bottom open and box-type earthen carrier 1 is used as a box-type earthen carrier, the warehouse inner covers 10 and 11 are rotated to the lower solid line position, and these warehouse inner covers 10 and 11 are rotated.
The upper surface of the lower frame 11 and the upper surface of the lower frame 5 can be flush with each other to be smooth. Accordingly, for example, when the backhoe is used to scrape out the earth and sand in the hold, the work can be easily and efficiently performed because there is no protrusion in the hold.

According to the structure of the present embodiment, there is an advantage that substantially the same inner volume of the hold can be secured when used as an open-bottomed soil carrier and as a box-type soil carrier. Also,
Since the switching between the bottom-opening type soil carrier and the box type soil carrier can be performed by hydraulic drive, the operation may be performed from the control stand on the upper deck, and there is an advantage that the switching operation is easy.

In the present embodiment, the inner covers 10, 11
It is preferable to provide a bilge suction facility between the bottom and the bottom opening doors 8 and 9 because the residual water treatment can be performed to prevent water from entering the hold even when used as a box-type earth carrier. .

[Brief description of the drawings]

FIG. 1 is a partial perspective view of a bottom-opening and box-type earth transport ship according to an embodiment of the present invention.

FIG. 2 is a plan view of a bottom-opening and box-type soil carrier according to the present embodiment.

FIG. 3 is a cross-sectional view of the bottom-opening and box-type earth transport ship of the present embodiment.

FIG. 4 is a partially enlarged view of FIG. 3;

FIG. 5 is a cross-sectional view of a conventional bottom-opening and box-type soil carrier.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottom open and box type soil carrier 2 Hull 4 Hold 6a, 7a Inner side wall 8, 9 Bottom open door 10, 11 Cover in a warehouse (movable door) 12, 13 Hydraulic cylinder 18, 19 link

Claims (2)

[Claims] 1. A movable door that forms a hopper swash plate of an open-bottomed earth-moving ship when pivoted upward and forms a horizontal inner bottom of a box-type earth-moving vessel when pivoted downward. A bottom-opening and box-type soil carrier characterized by: 2. The bottom-opening and box-type earth transport ship according to claim 1, wherein the movable door is provided symmetrically, and is pivotally operated by drive means arranged on each of a bow side and a stern side. .