JP2000289689A - Waterproof door device for bulk carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the waterproof property of the partition wall insertion part of a cutting-out conveyer which conveys a bulk exhausted from the bottoms of plural cargo rooms partitioned by partition walls. SOLUTION: A frame body 16 is set by surrounding an opening 13 at one side surface of a partition wall, the first door body 19 coincident to the trough form of the forward route belt 9a of a cutting-out conveyer is set rotatable upward, the second door body 25 coincident to the trough form is set movable between the forward route belt 9a and the backward route belt 9b, and the third door body 31 is set movable up and down to the lower side of the backward belt 9b respectively. The opening 13 is closed in the condition that the first door body 19 directs downward, and the second and the third door bodies 25 and 31 are raised, to hold the belts 9a and 9b, and pressure-contacting to the frame body 16, The opening by the water pressure of the first door body 19 is prevented by a fixing mechanism 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulk carrier for transporting bulk solids such as coal, iron ore, wood chips, limestone, and grains, which are irregular solid cargoes, by sea. The present invention relates to a waterproof door device for a bulk carrier having a plurality of cargo compartments arranged in different directions and an unloading system including a cut-out conveyor including a belt conveyor installed at the bottom of the ship through a bulkhead. .

[0002]

2. Description of the Related Art In order to unload bulk materials loaded in a plurality of cargo compartments arranged in the longitudinal direction of the hull of a hold, a cut-out conveyor installed at the bottom of the ship through a partition partitioning the cargo compartment, A dispensing machine that is installed at the bottom of the cargo compartment to discharge loose materials and transfer them to the cutting conveyor, a vertical conveyor that is installed at the bow or stern and sends the bulk of the cutting conveyor above the upper deck, and above the upper deck It is widely known to provide a bulk carrier with an unloading system having an unloading conveyor installed on a berth and transporting the bulk of the vertical conveyor to a predetermined location on the wharf.

[0003] When a bulk carrier equipped with such an unloading system is damaged by the grounding or collision of the hull, the cut-out conveyor of the bulkhead is prevented so that the inundation does not cover the entire hull and sink. It has been considered to provide a waterproof door device that closes the penetrating portion and measures the watertightness of the cargo compartment, one of which is proposed in Japanese Patent Application Laid-Open No. 5-124576.

[0004] The waterproof door device disclosed in the above publication is
As shown in FIG. 9, the forward belt 6 of the cut-out conveyor 60
And 0 _a first door member 61 is located above the, the second door member 62 is positioned between the forward belt portion 60 _a and the return belt portion 60 _b, is located below the return belt portion 60 _b A third door body 63, the first door body 61 and the second door body 62 are capable of ascending and descending, and the third door body 63 is fixed on a ship bottom 64 in a watertight manner. An elevating device 65 composed of a fluid pressure cylinder is installed above 61.

Then, the first and second doors 61 and 62 are lowered by operating the lifting / lowering device 65 in accordance with the guide grooves 68 provided on both sides of the opening 67 of the partition 66.
Forward belt unit by 2,63 60 _a and the return belt portion 60 _b
Are to close the opening 67 in a watertight state sandwiched from above and below in a flat state.

[0006]

The cutting conveyor 60 has a trough-shaped trough-shaped idler provided at _a predetermined interval in the forward belt portion 60a, similarly to a normal belt conveyor for handling bulk materials, and the opening 67 is formed. The trough shape is maintained when passing.

[0007] Thus trough-shaped and is the forward belt portion 60 _a has upper and lower first door member 61, is pushed down as flat condition across the second door member 62, forming a trough in a state almost without looseness is to pull together to forcibly deform by being belt and packing 61 _a, 6 that by the repulsive force of the belt is provided on each door body 61, 62, 63
2 _a, 62 _b, 63 _a is illegally modified, there is a concern that impairing watertightness occurs a gap. In addition, if closed during navigation for safety, there is a concern that the belt may be deformed during that time, resulting in an irregular trough shape or significant deterioration of the belt.

[0008] Further, the first door body 61 and the second door body 62 are fixed to the third door body 63 which is fixed downward.
_a, in order to overlap one above the watertight each other across the return belt portion 60 _b must be moved considerably increase the first door member 61 of the raised stand-by position to the lowered closed position, as the lifting device 65 is long Therefore, depending on the hold structure, it may be difficult to secure the installation space.

According to the present invention, cargo is opened by closing the opening of a partition through which the cut-out conveyor passes by sandwiching the forward and backward belts of the cut-out conveyor between three upper, middle and lower doors. It was made in order to solve the problems that the above mentioned that measures the watertightness of the room has, that the watertightness is uneasy, that the installation space may be difficult to secure, that the belt is easily deformed or deteriorated. It is an object of the present invention to provide a bulk carrier with an easily installed waterproof door device which is excellent in watertightness and maintains watertight even when high water pressure acts due to flooding.

[0010]

According to the present invention, a plurality of cargo compartments separated by partition walls are arranged side by side in the longitudinal direction of the hull, and a belt conveyor for sending loose materials discharged from the bottom of the cargo compartment to a bow or a stern. The waterproof door device for closing an opening in a bulk carrier, which is provided with a cut-out conveyor made of a material penetrating through an opening provided in a partition wall, has solved the above problem as follows.

That is, a frame provided on one side of the partition wall surrounding the opening, and a substantially horizontal standby position and a vertically downward closing position above a trough-shaped forward belt portion of the cut-out conveyor. A first door body rotatably mounted between the first door body having a protrusion conforming to the trough shape, between a standby position lowered between the forward belt portion and the backward belt portion of the cutting conveyor and a closed position raised. A second door body having a recessed portion that is installed to be able to move up and down and conforms to the trough shape, and a third door body that is installed to be able to move up and down between a standby position that is lowered below the return belt portion and a closed position that is raised. And a fixing mechanism for fixing the first door body to the closed position.

In the closed position, the doors vertically overlap each other with the forward belt and the backward belt sandwiched therebetween, and contact the frame in a watertight manner to close the opening. This makes it impossible to rotate in the direction of the standby position.

As described above, by rotating the upper door body and raising and lowering the middle and lower door bodies, it is possible to install the apparatus without requiring a large space, and to deform the trough shape of the outward belt portion. By holding the door without closing and fixing the upper door body to the closed position, watertightness can be maintained even when high water pressure acts.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 schematically shows a bulk carrier to which the present invention is applied. 2
Are partitioned by a partition wall 3 and a plurality of, in the illustrated embodiment, three cargo compartments 4 arranged in the longitudinal direction of the hull are provided. Each cargo hold 4
Are formed in a hopper shape, and a flat floor plate 5 having a bottom thereof is provided with a slit-shaped cutout 6, and a dispenser 7 that reciprocates along the upper surface of the floor plate 5 is provided.
A cutting conveyor 9 formed of a belt conveyor is provided below the floor plate 5 so as to penetrate the partition wall 3.

The litter in the cargo compartment 4 is discharged from the cutout 6 by the payout machine 7, is sent to the stern on the cutout conveyor 9, passes through the vertical conveyor 11 extending above the upper deck 10, and is transferred to the landing conveyor 12. It will be relocated and landed at a designated location on the wharf.

A waterproof door device 15 according to the present invention, which is typified by an embodiment described below, is installed in each of all the openings 13 of all the partition walls 3 through which the cut-out conveyor 9 penetrates.

Referring to FIG. 2 and subsequent figures, the waterproof door device 15 includes a frame 16 which is attached to one side of the partition wall 3 around the opening 13 in a watertight manner, and a forward belt portion 9 of the cut-out conveyor 9.
a first door member 19 which is disposed above the _a, a second door member 25 which is installed between the forward belt unit 9 _a and backward belt portion 9 _b, the third door was installed below the return belt portion 9 _b And a body 31.

The frame 16 together is made to fix the packing 17 disposed to surround the opening 13 made of an elastic sealing material on the front contact is Kakutobiratai 19,25,31, left and right vertical frame portions 16 _a, 16 _a And a flat guide frame piece 18 projecting therefrom.

The first door member 19 has a support shaft 22 projecting trapezoidal protrusions 20 and two ends that match the trough shape of the forward belt portions 9 _a, the horizontal portion 16 _b on the frame 16 The support shaft 22 is rotatably supported by bearings 23 installed between the vertical frame portion _16a and the guide frame piece 18 on both sides of the support shaft 22. One end of the support shaft 22 constitutes a rotation drive mechanism 24. through a reduction gear 24 _b which is coupled to an electric motor is a motor 24 _a. The first door body 19 is pivoted between a substantially horizontal standby position and a closed position which is vertically downward and closely adheres to the packing 17, and the packing 21 is fixed to an end face which faces downward when the first door body 19 is lowered. Have been.

The second door member 25 is forward belt unit 9 _a trapezoidal recess portion 26 and the left and right side end portions wedge piece projecting from the upper and lower opposed faces the guide frame pieces 18 which matches the trough shape of the 2
Has a 7, cradle 3 which is provided between these sandwich the left and right side end portions between the guide frame pieces 18 and vertical frame portion 16 _a
And is movable up and down between 0 rode to the standby position and a closed position in contact with the forward belt unit 9 _a. Further, packings 28 and 29 are fixed to upper and lower end surfaces of the second door body 25.

The third door body 31 is a guide frame piece 1 at both left and right end portions.
8 has a wedge piece 32 projecting therefrom, and a packing 33 is fixed to the upper end face, and the left and right ends are sandwiched between the vertical frame piece 16 _a and the guide frame piece 18. It is possible to move up and down.

Elevating drive mechanism 3 for raising and lowering third door body 31
Reference numeral 5 designates an elevator 36 composed of two left and right worm jacks attached to a base 34 installed therebelow, and an electric motor and a reduction gear 39 as a motor 38 coupled to one end of a transmission shaft 37 for simultaneously driving these. It is configured.

Each of the wedge pieces 2 of the second door body 25 and the third door body 31 that have risen to the closed position are placed on the left and right guide frame pieces 18.
Pressing pieces 40 and 41 are provided to contact and slide on the packings 17 of the frame 16 by contacting and sliding on the packings 7 and 32. As these pressing parts 40, 41, widely known clamping bolts having a ball held at the tip are used, which come into contact with the wedge pieces 27, 32 with a small frictional resistance and at the closed position on the packing 17. The mounting position can be adjusted so as to make proper pressure contact.

The first door 19 is in a horizontal state along the lower surface of the floor plate 5 of the cargo compartment 4, the second door 25 is on the cradle 30, and the third door 31 is lowered by the elevator 36. In the standby position, the belt of the cut-out conveyor 9 travels without contacting them, and conveys the bulk materials discharged from the cargo compartment 4. Forward belt portion 9 _a is a trough-shaped,
The return belt portion _9b is flat.

When closing the opening 13, first, the first door 19 in a horizontal state is rotated by the rotation drive mechanism 24 so as to be vertically downward, and the upper end of the surface facing the packing 17 of the frame 16. And the right and left ends are pressed in a watertight manner. At this time, the downward end face is the forward belt portion _9a.
Slightly upward from

Next, increasing the third door element 31 by the elevation driving mechanism 35, push this upper end surface of the flat linearly in contact with the lower surface of the return belt portion 9 _b, then return belt portion 9 _b pushes up this top surface of contact with the lower end face of the flat straight second door member 25, push it further upper end face of the second door member 25 is in contact with the lower surface of the forward belt portions 9 _a, the first door member 19 is brought into contact with the lower end face.

The return belt portion _9b is slightly lifted upward in the flat shape, and the forward belt portion _9a is lifted slightly upward in the trough shape, and the packings 33, 29 and 28 sandwiching these are formed. 21 as well as pressed in close contact with the return belt portion 9 _b and the forward belt unit 9 _a and, a watertight directly adhered to each other at their both sides. Thus, it is possible to obtain a watertight underway without or degrade the particular belt or with a deformed favorite phrase in the forward belt portion 9 _a of the cut-out conveyor 9.

Immediately before the second door body 25 and the third door body 31 reach the closed position and stop, the wedge pieces 27 and 32 come into contact with the pressing pieces 40 and 41, and the frame body follows the inclined surfaces thereof. 16, the left and right ends of the surface of the second door body 25 facing the frame 16, and the lower ends and the left and right sides of the surface of the third door body 31 facing the frame 16. The part closely contacts the packing 17 to make it watertight.

As described above, the opening 13 is closed in a watertight manner, and the second door 25 and the third door 31 sandwich both left and right ends between the frame 16 and the guide frame piece 18.
Particularly in the illustrated embodiment, the wedge pieces 27, 32 and the pressing pieces 40, 41
, Any cargo hold 4
Even if it is submerged in water, there is no disadvantage that it is moved by the water pressure to form a gap.

However, the first door body 19 receives the water pressure of the first door body 19 by the frame body 16 when water enters the cargo compartment 4 on the side where the watertight door device 15 is installed with the partition wall 3 interposed therebetween. Therefore, the closed position is maintained, but when the water pressure due to the inundation of the cargo compartment 4 on the opposite side acts, it is likely to be pushed and opened against the braking force of the rotary drive mechanism 24.

Therefore, the present invention has a fixing mechanism 43 for fixing the first door body 19 to the closed position. The fixing mechanism 43 is fixed to a portion of the support shaft 22 that protrudes outward on both sides of the frame 16, and rotates together with the first door 19 in the first partial piece 4.
4, a plate-like second piece 45 along vertically extending in the vertical frame portion 16 _a left and right side edges are consolidated protrude outward of the second door member 25, the arm of the first piece 44 consists abutting piece 46 mounted on one 44 _a, second and elevated relative downward and has been arm pieces 44 _a in the closed position of the first door member 19 toward the second door member 25 and the closed position together The two pieces 45 face each other,
In the closed position, the abutting piece 46 comes into contact with the surface of the second part 45 facing the frame 16, that is, the surface facing the opening 13.

The protruding piece 46 is connected to the aforementioned pressing pieces 40, 41.
Similarly to the above, a widely known clamping bolt having a ball held at the tip is used to contact the second part 45 with a small frictional resistance and securely contact the second part 45 in the closed position. Thus, the attachment position to the arm piece 44a can be adjusted.

Then, the water pressure due to the above-mentioned flooding of the cargo compartment 4 on the opposite side passes through the opening 13 and the frame 16 and the first door 19
When acting on the second part 45,
The second piece 45 is fixed to the second door body 25 to prevent the first door body 19 from being pushed and opened, and is fixed at the closed position.

The abutting piece 46 may be attached to the second piece 45, or the first piece 44 and the second piece 45 may be directly contacted without providing this.

In order to release the above-mentioned closed state in which the portion passing through the partition 3 of the cut-out conveyor 9 is closed, first, the third door body is lowered by the lifting / lowering drive mechanism 35, and the second door body 25 is released. Is lowered by its own weight, and then the first door body 19 is brought into a horizontal state by the rotation drive mechanism 24.

[0036] During the closed state, since the sandwiched three door body 19,24,31 in a state of being pulled slightly upward without deforming the forward belt unit 9 _a and backward belt portion 9 _b, without causing inconvenience causing soil spills the deformation habit is attached to particular trough shape of the forward belt portions 9 _a as an illegal type as long closed state and belt degradation due to deform or pulling force Is lost.

[0037]

As described above, according to the present invention, it is possible to install the belt without requiring a large space and to forcibly deform or pull the belt so as not to hinder the unloading operation. The opening, which is a location, can be closed in a watertight manner, and the watertightness can be maintained against the water pressure from either side, so that the expansion of the inundation area can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view schematically showing an example of a bulk carrier to which the present invention is applied.

FIG. 2 is a front view of the waterproof door device according to the embodiment of the present invention when it is released.

FIG. 3 is a side view as viewed in the direction of arrows AA in FIG. 2;

FIG. 4 is a sectional view taken along the line BB of FIG. 2;

FIG. 5 is a front view of the embodiment of FIG. 2 in a closed state.

FIG. 6 is a side view as viewed in the direction of arrows CC in FIG. 5;

FIG. 7 is a sectional view taken along line DD of FIG. 5;

FIG. 8 is a sectional view taken along the line EE in FIG. 5;

FIG. 9 is a front view showing a conventional example.

[Explanation of symbols]

3 partition wall 4 cargo hold, 9 cutting conveyor, 9 _a forward belt unit, 9 _b return belt portion, 13 opening, 15 waterproof door device, 16 the frame, 17,21,28,29,33 packing, 19 first Door body, 20 projecting part, 24 rotation drive mechanism, 25 second door body, 26 hollow part, 31 third door body, 35 lifting drive mechanism, 43 fixing mechanism,

Claims (2)

[Claims] A plurality of cargo compartments separated by partition walls are arranged side by side in the longitudinal direction of the hull, and a cut-out conveyor comprising a belt conveyor for sending bulk materials discharged from the bottom of the cargo compartment to a bow or a stern is provided. A waterproof door device for closing the opening in a bulk carrier that is installed through the opening provided in the partition, and a frame body provided on one side of the partition surrounding the opening. A first portion having a protrusion that is rotatably installed between a substantially horizontal standby position and a vertically downward closed position above a trough-shaped forward belt portion of the cut-out conveyor and that matches the trough shape; A recess which is installed to be able to ascend and descend along the frame body between a door body and a standby position lowered between a forward belt portion and a return belt portion of the cut-out conveyor and a closed position which is raised, and a recess conforming to the trough shape. Department A second door body, a third door body that can be moved up and down along the frame body between a standby position that is lowered below the return belt portion and a closed position that is raised, and the first door body. A fixing mechanism for fixing the door to a closed position, wherein the doors are vertically overlapped with each other across the forward belt and the backward belt in the closed position, and the door is closed in a watertight manner with the frame. And the first door body is not allowed to rotate in the standby position direction by the fixing mechanism. 2. The fixing mechanism includes a first part that rotates integrally with the first door and a second part that moves up and down integrally with the second door, wherein the first door is in a closed position. 2. The waterproof door device for a bulk carrier according to claim 1, wherein the first part is in contact with a surface of the second part facing the surface of the frame in contact.