JP4324889B2 - Waterproof door device for bulk carriers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bulk carrier that transports bulk, which is an irregular solid cargo such as coal, iron ore, wood chips, coal stone, and grain, to the sea, and more specifically, a plurality of bulk carriers that are partitioned by a bulkhead and arranged in the longitudinal direction of the hull. The present invention relates to a waterproof door device installed in a bulk carrier having an unloading system including a cutting conveyor composed of a belt conveyor installed on the ship bottom through a bulkhead.
[0002]
[Prior art]
In order to unload the bulk material loaded in the cargo compartments arranged in the longitudinal direction of the hull of the hold, a cut-out conveyor installed at the bottom of the cargo through the bulkhead partitioning the cargo compartment, and the bottom of the cargo compartment Distributor to deploy and discharge the bulk material to the cutting conveyor, vertical conveyor installed at the bow or stern to send the bulk material of the cutting conveyor above the upper deck, and vertical on the upper deck It is widely known to provide a bulk carrier with an unloader system having a landing conveyor that delivers the bulk of the conveyor to a predetermined location on the wharf.
[0003]
Then, when a bulk carrier equipped with such an unloading system is damaged by the grounding or collision, the cargo compartments are watertight to each other so that the inundation does not sink over the entire hull. For example, it is considered that a waterproof door is provided at a partitioning-penetrating portion of the partition wall, and an example thereof is disclosed in JP-A-5-124576.
[0004]
Waterproof door device described in the publication includes a first door member 61 disposed above the forward belt portion 60 _a of the cut-out conveyor 60 as shown in FIG. 8, the forward belt portion 60 _a and the return belt portion 60 a second door member 62 installed between the is _b, comprises a third door body 63 is placed under the return belt portion 60 _b, a first door member 61 and the second door 62 first door member The third door body 63 is fixed on the ship bottom 64 and can be moved up and down by a lifting device 65 composed of a fluid pressure cylinder coupled to 61.
[0005]
The three door bodies 61, 62, and 63 are retracted to positions that do not hinder the running of the cutting conveyor 60 and the conveyance of loose materials in the open state. Then, the lifting device 65 is operated to lower the first door body 61 and the second door body 62, and the forward belt portion 60 _a and the return belt portion 60 _b are attached to the mating surfaces of the door bodies 61, 62, 63. By being sandwiched, the door 67 is closed to close the opening 67 of the partition wall 66.
[0006]
[Problems to be solved by the invention]
In the watertight door device, the left and right edge portions of the first door body 61 and the second door body 62 that are raised and lowered are watertightly fitted in the guide grooves 68 provided on both sides of the opening 67, and the forward belt portion 60. together are brought into close contact them with each other by attaching the packing 61 _a, 62 _a each of the lower end surface and the upper end surface of the second door member 62 of the first door member 61 which forms a mating surface sandwiching the _a, the return belt portion 60 _b By attaching packings 62 _b and 63 _a to the lower end surface of the second door body 62 and the upper end surface of the third door body 63 that form the mating surfaces to be sandwiched and bringing them into close contact with each other, the opening 67 will be closed in a watertight manner. It is what.
[0007]
Therefore, it is one of the necessary conditions for preventing the expansion of the flooded area to completely close the mating surfaces extending in the width direction of the cutting conveyor 60 of the door bodies 61, 62, and 63 and to close them.
[0008]
However, the packing 61a of the first door member 61 and the second door 62, when 62a is in close contact with each other sandwich the forward belt portions 60a, and packing 62b of the second door member 62 and the third door element 63, 63a is backward When the belt portion 60b is sandwiched and brought into close contact with each other, there is a concern that the packings 61a and 62a, 62b and 63a may not be brought into close contact with each other on both sides of the belt.
[0009]
Further, on the side of both side edges of each belt forward belt portion 60 _a and the return belt portion 60 _b in the door closing condition, a gap by a sudden change of the packing _{61 a, 62 a, 62 b} , 63 a compression amount If it is made, when one cargo compartment is inundated due to a marine accident, this water flows into the adjacent cargo compartment through the gap and results in expanding the inundated area.
[0010]
The present invention closes the opening of the partition wall through which the cutting conveyor passes by sandwiching the forward belt portion and the return belt portion of the cutting conveyor between each of the upper, middle and lower door bodies. It has been made to solve the problem that the above-mentioned thing that measures the water tightness of the belt, there is a concern that inadequate contact and gaps may occur on both sides of the door with the belt sandwiched in between, Regardless of the thickness of the belt that constitutes the cutting conveyor and the material and thickness of the packing provided on the mating surface of each door body, it can be completely closed, and a highly reliable waterproof door device for watertightness is provided for bulk carriers. It is intended to be prepared.
[0011]
[Means for Solving the Problems]
In the present invention, a plurality of cargo compartments partitioned by bulkheads are arranged side by side in the longitudinal direction of the hull, and a cutout conveyor comprising a belt conveyor for sending loose matter discharged from the bottom of the cargo compartment to the bow or stern is provided in the bulkhead. A waterproof door device for closing an opening in a bulk carrier that is installed through an open opening, the first door body installed above the forward belt portion of the cutting conveyor, and the outgoing path of the cutting conveyor It comprises a second door installed between the belt and the return belt and a third door installed below the return belt, and these three doors are separated from each other in the open state. For waterproof door devices that allow the conveyance of loose objects by a conveyor and overlap each other in a closed state with the forward belt portion and the backward belt portion sandwiched between the respective mating surfaces, the waterproof door device is as follows: Applying means Therefore it was decided to solve the problem.
[0012]
That is, a plate member having the same thickness as that of the belt of the cutting conveyor is provided so as to overlap with the left and right side ends of the packing provided on any one end face of the door body that forms the mating surface in each mating surface. When these doors are open, the leading edge toward the belt is positioned outward from the left and right side edges of the forward belt part and the return belt part, and when the door is closed, the leading edge is at the side edge. The door is moved along the surface of the packing in conjunction with the opening / closing operation of the door so as to be in the pressed position.
[0013]
In this way, the plate members on both sides substantially expand the belt width in the closed state, so that the packing on the end surface of the door body is evenly compressed over almost the entire length in the left-right direction. The purpose of closing without making sufficient parts or gaps and making the water-tightness highly reliable will be achieved.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an outline of a bulk carrier to which the present invention is applied, in which a hold 2 inside a hull 1 is partitioned by a bulkhead 3. In the illustrated embodiment, a plurality of cargo compartments 4 arranged in the longitudinal direction of the hull are provided. Each cargo chamber 4 is formed in a hopper shape, and a slit-shaped exit 6 is provided in a flat floor plate 5 at the bottom thereof, and a dispenser 7 that reciprocates along the upper surface of the floor plate 5 is provided. . Further, below the floor plate 5, a cutting conveyor 9 made of a belt conveyor is installed through the partition wall 3.
[0015]
Bulk material in the cargo compartment 4 is discharged from the exit 6 by the dispenser 7 and is transferred to the landing conveyor 12 via the vertical conveyor 11 which is sent to the stern on the cutting conveyor 9 and extends above the upper deck 10. And landed at a predetermined location on the wharf.
[0016]
The waterproof door device 15 according to the present invention represented by the embodiment described in detail below is provided in each of all the openings 13 of all the bulkheads 3 through which the cutting conveyor 9 in the above-described commonly known bulk carrier ships. Is installed.
[0017]
The waterproof door apparatus 15 with reference to FIG. 2, a frame 16 which is mounted fixed in a watertight on one side of the partition wall 3 surrounding the opening 13, the installed above the forward belt 9 _a cutting-out conveyor 9 has a Ichitobiratai 19, a second door member 25 which is installed between the forward belt unit 9 _a and backward belt portion 9 _b, and a third door body 31 is placed under the return belt portion 9 _b Yes.
[0018]
The frame body 16 has a packing 17 made of an elastic seal material arranged around the opening 13 fixed to the front surface where the door bodies 19, 25, 31 contact, and is positioned in front of the left and right vertical frame portions 16 _a. A guide frame piece 18 is protruded.
[0019]
The first door body 19 has a trapezoidal protrusion 20 that matches the trough shape of the forward belt portion 9 _a and support shafts 22 that protrude at both ends, and both sides of the upper horizontal frame portion 16 _b of the frame body 16. On the other hand, _a support shaft 22 is rotatably supported by a bearing 23 installed between the vertical frame portion 16 _a and the guide frame piece 18, and an electric motor and a speed reducer serving as _a prime mover 24 _{a are provided} at one end of the support shaft 22. rotary drive mechanism 24 comprising a 24 _b are connected. The first door body 19 is rotated between a substantially horizontal opening position and a vertically downward closing position, and a packing 21 is fixed to a lower end surface that faces downward when the door is closed.
[0020]
The second door body 25 has a trapezoidal recessed portion 26 that matches the trough shape of the outward belt portion 9 _a , and the left and right end portions are substantially spaced between the vertical frame piece 16 _a and the guide frame piece 18. They crowded fitted without being vertically movable between a closing position in contact with the door open position and the forward belt unit 9 _a riding on cradle 30 provided therebetween. Further, packings 28 and 29 are fixed to the upper and lower end faces of the second door body 25.
[0021]
The third door body 31 can be moved up and down by fitting both left and right end portions between the vertical frame piece _16a and the guide frame piece 18 with almost no gap, and a packing 33 is fixed to the upper end surface.
[0022]
The elevating drive mechanism 35 for elevating and lowering the third door body 31 includes an elevating machine 36 composed of two left and right worm jacks installed on a base 34 installed therebelow, and a prime mover coupled to one end of a transmission shaft 37 for driving them. 38 and the reduction gear 39.
[0023]
The first door 19 is in a horizontal state along the bottom surface of the floor 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 door state, the cutting conveyor 9 travels without contacting these and conveys the bulk material discharged from the cargo compartment 4. The forward belt portion 9 _a is trough-shaped, and the return belt portion 9 _b is flat.
[0024]
When closing the opening 13, first, the first door body 19 in the horizontal state is rotated by the rotation drive mechanism 24 so as to be vertically downward, and the upper end portion of the surface facing the packing 17 of the frame body 16 and both the left and right sides The end is pressed. At this time, the lower end surface is spaced slightly above the forward belt unit 9 _a.
[0025]
Then, increasing the third door element 31 by the elevation driving mechanism 35, the flat straight upper surface pushes up this contact with a bottom surface of the return belt portion 9 _b, then the upper surface of the return belt portion 9 _b is second door member in contact with the lower end face of the flat linear 25 pushes up this push it further upper end surface of the concave second door member 25 is in contact with the lower surface of the forward belt portions 9 _a, the first door member 19 It comes in contact with the convex lower end surface.
[0026]
In this closed state, the second door body 25 and the third door body 31 are fitted between the vertical frame portion 16 _a and the guide frame piece 18 with almost no gap, and the first door body 19 is attached to the frame body 16. By being in the pressure-contacted posture, it is in close contact with the packing 17 and the four peripheral edges of the opening 13 are watertight.
[0027]
According to the illustrated embodiment, the return belt portion _9b is lifted up slightly in a flat shape, and the forward belt portion 9a is lifted up slightly in _a trough shape to be in a closed state. There is no worry of premature deterioration of the belt, and there is no worry of spilling the trough shape.
[0028]
Further, the first door body 19 may be opened and closed by being lifted and lowered without rotating if the installation space is sufficient.
[0029]
The packings 21, 28, 29, 33 of the door bodies 19, 25, 31 are provided over almost the entire length in the left-right direction, and both ends reach the front region of the packing 17 provided in the vertical frame portion 16 _a. ing. Thus, if the packings 21, 28, 29, and 35 are completely in close contact with each other at the mating surfaces of the door bodies 19, 25, and 35 when the door is closed, the spaces on both sides of the partition wall 3 can be blocked from each other.
[0030]
However, when brought into close contact with each other by sandwiching a forward belt unit 9 _a and backward belt portion 9 _b, if there is that their both end insufficient portions or gaps in close contact with the side of the edge is made, it is watertight It is as mentioned above that it impairs sex.
[0031]
The present invention is intended to solve this problem, the deployment plate member 41, 51 of the belt and the same thickness of the cut-out conveyor 9 for the forward belt unit 9 _a, each left and right sides of the return belt portion 9 _b The packings 21, 28, 29, and 35 were evenly compressed so as to be in close contact with them.
[0032]
Plate member 41 to be deployed on either side of the forward belt unit 9 _a mainly with reference to FIG. 6, is superimposed on the upper end surface of the packing 28 of the second door member 25, the inclined portion of the recess portion 26 and the horizontal on both sides It bends in a “h” shape across the part and moves in the left-right direction.
[0033]
That is, the entire plate member 41 is rubber, preferably made of a rubber material of the belt and homogeneous cutting conveyor 9, made of a metal plate near and proximal of the distal edge 41 _a facing the outward belt portion 9 _a Reinforcement pieces 42 and 43 are embedded. On the other hand, a spring chamber 44 the tension spring 45 a coil spring tension be provided within the front and rear both sides portion of the second door member 25 and interior, projecting tip edge 41 _a both sides of the reinforcement piece 42 on the tip end side The tip end and the tension spring 45 are connected by a tension line 46 made of a wire rope. Further, an interlocking cable 48 made of a wire rope having one end consolidated to the guide frame piece 18 is provided with a stationary wheel 49 provided on the guide frame piece 18 and a guide wheel 50 provided on the second door body 25 so as to be positioned below the fixed ring 49. To the reinforcing part 43 on the proximal end side.
[0034]
Then, the plate member 51 to be deployed on either side of the return belt portion 9 _b is mainly with reference to FIG. 7, superimposed on the packing 33 of the upper end face of the third door element 31, superimposed on the flat linear surface The whole is made of metal.
[0035]
On the other hand, spring chambers 52 are provided on both front and rear surfaces of the third door body 31 and a tension spring 53 made of a tension coil spring is provided, and a leading edge 51 _{a of the} plate member 51 facing the return belt portion 9 _b . A portion protruding to both sides of the wire and a tension spring 53 are connected by a tension line 54 made of a wire rope. In addition, an interlocking rope 55 made of a wire rope having one end consolidated to the guide frame piece 18 is a stationary transport 56 provided on the guide frame piece 18, and a guide ring 57 provided on the third door body 31 so as to be positioned below it. To the base end portion of the plate member 51.
[0036]
In the opened state, the second door body 25 and the third door body 31 are both placed at the lowered position, and the distance between the stationary wheels 49 and 56 and the guide wheels 50 and 57 is large. For this reason, the interlocking cables 48 and 55 place the plate members 41 and 51 at positions where their front end edges 41 _a and 51 _a are separated outward from the left and right end edges of the forward belt portion 9 _a and the return belt portion 9 _b. It is located.
[0037]
When the third door body 31 and subsequently the second door body 25 start to move upward for closing, the distance between the stationary wheels 49 and 56 and the guide wheels 50 and 57 decreases, and the interlocking cables 48 and 55 Causes loosening. The tension springs 45 and 53 pull the plate members 41 and 51 gradually by this amount to bring them closer to the forward belt portion 9 _a and the backward belt portion 9 _b , and the leading edges 41 _a and 51 _a are attached at the same time or immediately before the closing operation is completed. The belt portions 9 _a and 9 _b are pressed and adhered to both left and right edges.
[0038]
Therefore, the mating surfaces of the door body 19,25,31 in closing state to the forward belt unit 9 _a sides of the plate member 41 thereof, return belt portion 9 _b and the packing 21 on both sides of the plate member 51 and 29 And 35 are in close contact with each other in an evenly compressed state, and can be closed without forming insufficient portions or gaps.
[0039]
In this embodiment, the distance between the edge 41 _a, 51 _a and each belt portion 9 _a, 9 _b side edges of the plate members 41, 51 at the door opening position, the second door member 25 and the third By making the stroke equal to or slightly smaller than the stroke of the door body 31 to the closing position, the plate members 41 and 51 are firmly attached to the belt portions 9 _a and 9 _b in the closed state to expand the belt width. Effect is obtained. Also, by the pull of the plate members 41, 51 in leading edge 41 _a, 51 a tension spring on both sides of _a 45 and 53, by straight without skewing the leading edge 41 _a, 51 _a width thereof Can be made to adhere evenly and improve water tightness.
[0040]
Furthermore, since the plate members 41 and 51 are moved in conjunction with the opening and closing operations of the door bodies 25 and 31, there is an advantage that no special power unit is required. Furthermore, by moving the plate members 41 and 51, even if the belt width of the cut-out conveyor 9 is out of order and there is a slight shift in the lateral direction in the travel path, it is ensured to be in close contact without creating an overlap or gap. Can do.
[0041]
The plate members 41 and 51 are, for example, the plate member 51 along the third door body 31 along the lower end surface of the second door body 25, and the plate member 41 along the second door body 25 at the first door. It can be provided on any door body that opens and closes, such as along the lower end surface of the body 19.
[0042]
【The invention's effect】
As described above, according to the present invention, the door is closed without inadequate adhesion or gaps on the mating surfaces of the three door bodies sandwiching the forward belt portion and the return belt portion of the cutting conveyor, and the water is infiltrated through the opening of the partition wall. The inconvenience of expanding is completely eliminated.
[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 partially cutaway front view showing the embodiment of the waterproof door device according to the present invention when the door is opened.
3 is a cross-sectional view taken along line AA in FIG.
4 is a partially cut-away front view when the door of the embodiment shown in FIG. 2 is closed. FIG.
5 is a cross-sectional view taken along line BB in FIG.
6A and 6B show a plate member for the forward belt portion, where FIG. 6A is an explanatory plan view, FIG. 6B is an explanatory front view thereof, and FIG.
7A and 7B show plate members for the return belt portion, FIG. 7A is an explanatory plan view, FIG. 7B is an explanatory front view thereof, and FIG. 7C is an explanatory front view in a closed state;
FIG. 8 is a front view showing a conventional example.
[Explanation of symbols]
3 partition wall 4 cargo hold, 9 cutting conveyor, 9a forward belt unit, 9b return belt portion, 13 opening, 15 waterproof door device, 19 first door member, 21,28,29,3 3 packing, 25 second door Body, 31 3rd door body, 41, 51 plate member, 45, 53 tension spring, 48, 55 interlocking cord

Claims (2)

A plurality of cargo compartments partitioned by bulkheads are arranged side by side in the longitudinal direction of the hull, and a cutout conveyor comprising a belt conveyor for sending loose matter discharged from the bottom of the cargo compartment to the bow or stern is provided in the bulkhead. A waterproof door device for closing the opening in a bulk carrier installed through an opening, the first door body installed above the forward belt portion of the cutting conveyor, and the cutting conveyor A second door body installed between the forward belt section and the return belt section and a third door body installed below the return belt section, and the three door bodies are separated from each other in an open state. In the waterproof door device, which allows the transfer of the bulk material by the cutting conveyor and overlaps with each other in the closed state, the forward belt portion and the return belt portion are sandwiched between the respective mating surfaces and closely contact each other. Each mating surface
A plate member having the same thickness as the belt of the cutting conveyor is disposed on both the left and right ends of the packing provided on the end surface of one of the door bodies forming a mating surface, and the plate member opens the door. A position where the front end portion facing the belt when in the state is located outward from the left and right side end edges of the forward belt portion and the return belt portion, and the front edge is pressed against the side edge when in the closed state; As described above, the waterproof door device is moved along the surface of the packing in conjunction with the opening and closing operation of the door body.   The plate member is connected to a tension spring that works in a direction in which the leading edge is pressed against the side edge of the belt portion, and an interlocking rope that is located at a position away from the side edge when the door is open. 2. The cable according to claim 1, wherein the rope is loosened as the door body moves from the open position to the closed position, and the tension spring pulls the plate member by the amount of the looseness to approach the belt portion. Waterproof door device for bulk carriers.

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