JP3987189B2 - Unloading equipment for bulk carriers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an unloading device installed on a bulk carrier for bulk solid cargo, more specifically, a transport conveyor for transporting bulk cargo from one position on the ship to the upper deck, and a predetermined wharf from the conveyor. The present invention relates to an unloading device having a feature in a transfer part of loose materials between a landing conveyor and a conveyor for transportation to a place.
[0002]
[Prior art]
Ships mainly in coastal areas within a bulk carrier that transports bulk, non-standard solid cargo consisting of ores, coal, limestone, wood chips, grains, cement, etc. Things often have to be unloaded at the wharf with incomplete cargo handling facilities.
[0003]
For this purpose, Japanese Utility Model Laid-Open No. 2-333196 discloses that a bulk carrier ships with an automatic cargo handling facility that unloads bulk cargo from a cargo hold formed on the shore. ing.
[0004]
That is, the automatic cargo handling equipment of the bulk carrier described in the above publication and currently implemented forms a hopper-shaped cargo hold that is long in the hull longitudinal direction on the hull, and the bulk taken out from the bottom of the hull is removed in the longitudinal direction of the hull. It is sent to one point on the bow or stern side by a vertical conveyor that extends to the upper deck, then it is sent above the upper deck by a feeder conveyor that extends further upward, and further to a predetermined position on the wharf by a landing conveyor. It is configured to unload.
[0005]
Each of the above conveyors is generally a belt conveyor, and the bulk material in the cargo hold falls from the bottom of the conveyor onto the longitudinal conveyor by natural flow or scraping using a dispenser. The feeding conveyor is generally a well-known vertical belt conveyor that conveys bulk material from a low place to a high place in an enclosed state by two endless belts facing each other, or an inclined belt conveyor arranged in the transverse direction of a ship.
[0006]
In addition, the landing conveyor is installed along a boom supported in a cantilevered manner on the upper deck, and this boom protrudes outward from the hull during loading and unloading work. It is possible to turn so as to be positioned almost parallel to the hull. In addition, the height difference between the upper deck and the wharf varies greatly depending on the tide level and the depth of the inundation, so the boom can be raised and lowered to ensure unloading.
[0007]
[Problems to be solved by the invention]
The swivel center and the undulation center of the boom on which the landing conveyor is installed are orthogonal to each other, and the feed conveyor is arranged to drop and transfer the bulk material to the landing conveyor at the center of the swing.
[0008]
The transfer from the vertical conveyor to the transport conveyor and the transfer from the transport conveyor to the landing conveyor must be dropped from the delivery end of each conveyor to the delivery end of the next conveyor. A large amount of dust is generated depending on the bulk material.
[0009]
Since the vertical conveyor and the vertical conveyor do not rotate or undulate, the deterioration of the environment due to dust scattering can be easily prevented by incorporating the transfer portion between them into the housing.
[0010]
However, for the transfer part between the transporting conveyor and the landing conveyor, the landing conveyor rotates and undulates integrally with the boom, so at least the upper part of the upper conveyor A structure in which a chute that is connected to a built-in housing and is sent out from this is guided to the turning center portion of the landing conveyor and dropped, and a cover body that surrounds the landing conveyor is separated, and A fairly long opening is provided in the ceiling part of the cover body before and after the turning center, and the chute always faces the opening even when it is raised and lowered so that the transfer can be performed without any trouble.
[0011]
Therefore, dust may be scattered from the opening into the atmosphere, and the surrounding environment may be deteriorated over a wide range depending on weather conditions such as wind direction.
[0012]
The present invention relates to an automatic cargo handling facility for a bulk carrier, in particular, a transport conveyor for transporting bulk material sent to one place in the ship to the upper part of the upper deck, and a land landing for transporting it to a predetermined place on the dock. In the unloading device equipped with the conveyor for the transportation, when the bulk material is transferred between them, the problem that the dust is scattered in the atmosphere and the surrounding environment is deteriorated is solved. An object is to prevent dust from being scattered regardless of the posture of the installed boom.
[0013]
[Means for Solving the Problems]
In the present invention, a conveyor for transporting the bulk material taken out from the cargo hold in the ship and sent to one place in the ship to the upper part of the upper deck, and thereby to a predetermined place on the wharf. The landing conveyor is installed along a boom supported on the upper deck in a swingable and undulating manner, and the hauling conveyor is separated at the pivot center of the boom. The above-described problems have been solved in the following manner for an unloading device for a bulk carrier that is arranged so as to drop and transfer an object to a landing conveyor.
[0014]
That is, the ceiling of the turning center portion of the cover body provided on the boom and surrounding the landing conveyor is formed with a ceiling piece having elasticity in the boom longitudinal direction, and the bulk piece is passed through the ceiling piece. An opening is provided, and a chute that is connected to a housing surrounding the feeding conveyor and guides the bulk material to the pivot center of the boom and drops it onto the landing conveyor is fitted with the opening.
[0015]
Since the lower end portion of the chute is located on the pivot center of the boom, and therefore the opening is also located on the same center, the boom can be arbitrarily pivoted. Further, when the boom is raised and lowered, the chute fitted with the opening serves as a stopper for holding the opening at a fixed position, and the ceiling piece expands and contracts according to the raising and lowering. For this reason, the bulk material is always discharged from the chute in the space surrounded by the cover body and falls to the landing conveyor, and dust is prevented from being scattered around.
[0016]
In the above, when the ceiling piece is first made of a flexible sheet material, both the front and rear ends of the boom in the longitudinal direction are fixed, the opening is provided in the center, and the front and rear portions of the opening are formed in a corrugated shape and one of them is extended When the other side is configured to contract, secondly, when both side edges of the ceiling piece are engaged and held with guide rails provided on both sides of the cover body, third, the ceiling piece is attached to the boom. When it is configured to be curved along an arc surface centered on the undulation central axis, the ceiling piece can be smoothly expanded and contracted following the large undulation of the boom while the opening is held at a fixed position.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an outline of a bulk carrier equipped with an unloading apparatus according to the present invention, in which a cargo hold 3 is placed inside a hull 2 extending long in the vertical direction of the hull from near the bow of the hull 1 to near the stern. Is provided. The cargo hold 3 is a single, and is formed into a hopper shape that is long in the longitudinal direction of the hull, having a sloped portion facing each other at the bottom portion and a flat portion formed at the lowest point therebetween. It extends over the entire length.
[0018]
The flat portion has a slit-shaped outlet 4 that extends continuously over the entire length in the longitudinal direction of the cargo hold 3, and the widely known dispensing machine 6 described in Japanese Utility Model Laid-Open No. 2-333196 is flat. It is deployed close to the upper surface of the section. By causing the dispenser 6 to reciprocate over the entire length in the longitudinal direction of the cargo hold 3, the rotating wheel 6 a sequentially scrapes the loose pieces in the cargo hold 3 from the bottom layer and drops them from the take-out port 4.
[0019]
Below the take-out port 4, a longitudinal conveyor 7 including a belt conveyor is installed along the longitudinal direction of the take-out port 4. Then, the bulk material is transferred to a vertical or steep feeding conveyor 8 extending upward from the upper deck 5 from an empty space formed in front of the cargo hold 3 of the ship 2.
[0020]
The feed conveyor 8 has two endless belts 8a and 8b facing each other and conveys the bulk material from a low place to a high place in an enclosed state, and has the same structure as that generally known as a vertical belt conveyor. . 1 and 2, the portion extending upward from the upper deck 5 of this feed conveyor 8 is built in the housing 9, and the reverse portion at the upper end of the endless belts 8a, 8b, that is, the sending end. A chute 10 for dropping the loose material discharged from 8c to a predetermined location is connected to the housing 9.
[0021]
A swivel base 11 is disposed below the chute 10, and the swivel base 11 is rotated by a prime mover built in a base 12 installed on the upper deck 5. Further, the center of the discharge port 10a of the chute 10 and the turning center of the swivel base 11 are located on the same line.
[0022]
The swivel base 11 supports a support shaft 13 so as to be orthogonal to the turn center line, and this support shaft 13 is attached to a base end portion of a boom 15 on which a landing conveyor 14 is installed. The landing conveyor 14 is a belt conveyor and extends over the entire length of the boom 15.
[0023]
The boom 15 includes a girder member 16 that supports pulleys, rollers, and a prime mover of the landing conveyor 14, and a cover body 17 that surrounds the landing conveyor 15 and is assembled to the girder member 16. 11 is rotated in unison with the upper deck 5 and is located in a direction parallel to the hull 1 or protrudes outward in the hull 1 in an arbitrary direction. The boom 15 is connected to a fluid pressure cylinder or a wire rope (not shown), and is operated around these to rotate around the support shaft 13 and undulate.
[0024]
Within the ceiling 17a of the cover body 17, a certain section from the pivot center line of the boom 15 to the front and rear, that is, the pivot center portion is constituted by a ceiling piece 18 having elasticity in the boom longitudinal direction. The ceiling piece 18 has a large number of eaves members 19 extending in the crossing direction of the boom arranged in parallel to each other except for the central portion, and a flexible sheet material 20 made of canvas or rubber is fixed to the eaves member 19. The corrugated members 19 are loosened to form a corrugated shape, and an annular frame piece 21a forming an opening 21 is fixed to the central portion.
[0025]
Further, in the region where the ceiling piece 18 extends, the end face U-shaped guide rails 22 are attached to the left and right side walls of the cover body 17, and the non-slip wear-resistant liner 23 attached to both ends of the flange member 19. Is engaged with the guide rail 22. The front end and the rear end of the ceiling piece 18 are fixed to the ceiling 17a and the guide rail 22, respectively, and the rear end of the cover body 17 is closed by the rear wall 17c.
[0026]
According to the form shown in the figure, the ceiling piece 18 is curved along an arc surface centering on the central axis of the support shaft 13 that is the center of undulation of the boom 15, and when the boom 15 is in a horizontal state, the opening 21 is at its center. Is located at the top of the arcuate surface so as to coincide with the turning center. The lower end of the chute 10 is fitted into the frame piece 21 a with a slight gap, and the discharge port 10 a opens downward in the cover body 17 toward the landing conveyor 14.
[0027]
When the boom 15 is pivoted about the support shaft 13 and lifted, that is, when the tip is moved upward from the horizontal position, the ceiling piece 18 is shifted toward the rear of the pivot center axis of the boom 15. However, as shown in FIG. 5A, the frame piece 21a hits the chute 10 and the front portion of the frame body 21a of the sheet material 20 contracts with a narrow wave interval, and the rear portion has a wide wave interval. By extending, it can be smoothly rotated to a preset maximum raising position.
[0028]
On the contrary, when the tip is moved downward from the horizontal position, that is, when it is laid down, the ceiling piece 18 is shifted toward the front of the pivot center axis of the boom 15. At this time, as shown in FIG. 5B, the frame piece 21a hits the chute 10 and the front portion of the frame body 21a of the sheet material 20 expands with a wide wave interval, and the rear portion has a narrow wave interval. By contracting, it can be smoothly rotated to a preset maximum lying position.
[0029]
When the boom 15 is raised and lowered as described above, the chute 10 is inserted into the cover body 17 on the turning center axis, and the bulk material is always discharged in the space surrounded by the cover body 17 to land. It is dropped on the conveyor 14.
[0030]
The ceiling piece 18 may have a structure similar to a well-known folding door in which a large number of elongated plate pieces are connected so as to be bendable and an intermediate portion of each plate piece is moved along a guide. Moreover, it can also arrange | position along a plane, without arrange | positioning along a circular arc surface. However, as shown in the figure, there are advantages that it is possible to smoothly cope with a large undulation angle and to minimize a gap for scattering dust to the outside.
[0031]
【The invention's effect】
As described above, according to the present invention, the transfer of the bulk material from the transporting conveyor to the landing conveyor performed above the upper deck is always performed within the space surrounded by the cover body regardless of the posture of the boom. As a result, dust is not scattered widely in the atmosphere, and the surrounding environment can be maintained well.
[Brief description of the drawings]
FIG. 1 is a schematic longitudinal sectional view of a bulk carrier to which the present invention is applied.
FIG. 2 is an enlarged partial view of FIG. 1 showing an embodiment of the present invention.
FIG. 3 is a partial longitudinal sectional view further enlarging FIG. 2;
4 is a cross-sectional view of FIG.
FIG. 5 is an operation explanatory diagram of the embodiment shown in FIGS.
[Explanation of symbols]
2 ship, 3 cargo hold, 7 vertical conveyor, 8 forward conveyor, 9 housing, 10 chute, 11 swivel, 13 spindle, 14 landing conveyor, 15 boom, 17 cover body, 17a ceiling, 18 Ceiling part, 21 opening, 22 guide rail,

Claims (4)

A conveyor for transporting the bulk material taken out from the cargo hold in the ship and sent to one place in the ship to the upper part of the upper deck, and a landing conveyor for transporting it to a predetermined place on the wharf The landing conveyor is installed along a boom supported on the upper deck in a swingable and undulating manner. In an unloading device of a bulk carrier arranged to be dropped and transferred to the landing conveyor;
The ceiling of the turning center portion of the cover body provided on the boom and surrounding the landing conveyor is formed with a ceiling piece having elasticity in the boom longitudinal direction, and the ceiling piece is loose. A chute that has an opening for passage and that is connected to a housing that surrounds the feeding conveyor and guides a loose article to the pivot center portion of the boom and drops it onto the landing conveyor. They fit together;
A device for unloading a bulk carrier. The ceiling piece is made of a flexible sheet material, both the front and rear ends in the boom longitudinal direction are fixed, the opening is provided in the center, and the front and rear portions of the opening are formed in a corrugated shape. The apparatus for unloading a bulk carrier according to claim 1, wherein when one is extended, the other contracts. The unloading apparatus for a bulk carrier according to any one of claims 1 and 2, wherein the ceiling piece engages and holds both side edges with guide rails provided on both sides of the cover body. The unloading device for a bulk carrier according to any one of claims 1, 2, and 3, wherein the ceiling piece is curved along an arc surface centered on the undulation center axis of the boom.

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