Cargo ships
The cargo ship design includes storage compartments and guide rails to protect hold curtains from damage, enabling full cargo capacity and smooth operation by folding and storing them when not in use.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2026-04-09
AI Technical Summary
Cargo ship hold curtains are prone to damage when left unfolded in the hold, especially when filled with bulk cargo, which can cause damage from cargo scraps or lifting equipment.
A cargo ship design featuring storage compartments at the bow and stern for folding and storing hold curtains, with guide rails on the hull's sides and a sliding door mechanism to protect the curtains from damage and ensure smooth operation.
Prevents hold curtain damage by storing them when not in use, allowing the hold to be filled to capacity without interference from cargo or equipment, and ensures smooth movement and protection of guide rails.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to a cargo ship for transporting goods.
Background Art
[0002] A bulk carrier is a cargo ship designed to load unpacked bulk goods such as grains, ores, and cement into a ship's hold for transportation. As an example of such a cargo ship, or a cargo ship having a "curtain" inside the hold for the purpose of preventing rainwater and seawater from entering through the gaps of a steel lid covering the hatch from falling onto the cargo (commonly called a "general cargo ship" or a "steel ship"), the one described in Patent Document 1 is known. In this cargo ship, guide rails provided over the entire length on both sides in the longitudinal direction of the hatch inside the hold, a rope wound around rope rollers provided near both ends of each of these guide rails, and one rope arranged to surround the periphery of the hatch along the guide rails, a drum capable of rotating forward and backward around which the one rope is wound for moving the one rope in both forward and reverse directions, a plurality of guide rollers rotatably inserted into each of the guide rails, a guide roller inserted into one side guide rail, a curtain wire attached between the guide roller inserted into the other side guide rail, and a curtain covering the hatch fastened to the curtain wire. One end of this curtain is fixed to one end of the hatch, the end guide roller on the other end side of the curtain is fixed to the rope, and the rope is inserted through the guide rollers other than the end guide roller.
[0003] In a cargo ship equipped with a curtain as described above, when extending the curtain folded on the bow side of the hatch to close the hatch, the drum is rotated in one direction. As a result, the rope moves in one direction, and the end guide rollers fixed to the rope move simultaneously towards the stern within the guide rail. Therefore, the other end of the curtain is pulled toward the stern, and multiple guide rollers, via the multiple curtain wires to which the curtain is secured, move sequentially toward the stern within the guide rail. Thus, the curtain is fully extended, closing the hatch opening. Closing the hatch opening prevents cargo stored in the ship's hold from getting wet from seawater, rainwater, or condensation on the underside of the hatch cover, thus preventing deterioration of quality due to rust and other factors.
[0004] Furthermore, when folding the extended curtain and opening the cargo hold, the drum is rotated in the direction indicated by the other direction. As a result, the rope moves in the other direction, and the end guides fixed to the rope move simultaneously towards the bow within the guide rail. Multiple guide rollers within the guide rail are pushed by the aforementioned end guide rollers and move sequentially towards the bow within the guide rail simultaneously. Thus, the curtain moves towards the bow, folding sequentially for each curtain wire between the guide rollers, opening the cargo hold and resulting in the curtain being folded at the bow end of the cargo hold. [Prior art documents] [Patent Documents]
[0005] [Patent Document 1] Publication No. 3-24467 [Overview of the project] [Problems that the invention aims to solve]
[0006] Incidentally, in cargo ships like those described above, when the hold hatches are opened, the curtains (hold curtains) are folded up at the bow and left in the hold, so there is a risk that the curtains will be damaged by the cargo stored in the hold. In particular, when the cargo is bulk cargo, the hold is often filled to capacity, so the risk of the curtains being damaged by the scrap of the bulk cargo increases.
[0007] The present invention has been made in view of the above circumstances, and aims to provide a cargo ship that can prevent damage to the hold curtain, which opens and closes the hold opening of the ship's hold, by foreign objects such as part of the cargo, including scrap, stored in the ship's hold, when the hold curtain is open and the hold opening is open. [Means for solving the problem]
[0008] To achieve the above objective, the cargo ship of the present invention is a cargo ship comprising a hull, a cargo hold provided in the hull, and a hold curtain for opening and closing the cargo hold opening, A storage compartment provided on the bow and / or stern side of the hull, capable of storing the hold curtain in a folded state, The hull is provided with guide rails on each of the two sides in the width direction, extending to the storage section, and movably supporting both edges of the hold curtain in the width direction, The aforementioned hold curtain is characterized by moving along the guide rail and being folded and stored in the storage compartment.
[0009] Here, a single hold curtain for opening and closing the cargo hold opening is stored in a storage compartment located at the bow or stern of the hull. In storage compartments located at both the bow and stern of the hull, two hold curtains are used, one upper and one lower, in cases where the cargo hold is long, with one hold curtain stored in one storage compartment and the other in the other. Furthermore, two sets of guide rails are provided, one extending from approximately the halfway point along the length of the ship's hold to one storage area, and the other extending from approximately the halfway point along the length of the ship's hold to the other storage area.
[0010] In this invention, when the cargo hold opening is opened, the hold curtain moves along the guide rail and is folded and stored in the storage compartment, so it is not left lying around in the cargo hold. This prevents the hold curtain from being damaged by foreign objects such as scrap metal or other cargo stored in the cargo hold. Furthermore, since the hold curtains are not left in the ship's hold, the ship's hold can be filled to capacity.
[0011] Furthermore, in the above configuration of the present invention, the opening of the storage compartment may be provided with a sliding door that can be opened and closed by sliding it up and down.
[0012] Furthermore, in the above configuration of the present invention, the sliding door may be moved up and down by a sliding door drive mechanism.
[0013] The sliding door is sized to close the opening of the storage compartment and automatically slides up and down by a sliding door drive mechanism that includes a winch, wire, pulley, etc. The sliding door closes the opening when in the upper position and opens the opening when in the lower position.
[0014] With this configuration, by closing the opening of the storage compartment where the hold curtain is stored with a sliding door, it is possible to prevent cargo from entering the storage compartment through the opening and thus prevent damage to the hold curtain stored in the storage compartment. In particular, if the cargo is bulk cargo, if the opening is left open, there is a risk that foreign objects such as scrap and other parts of the bulk cargo may enter the storage compartment through the opening, but by closing the opening with a sliding door, this risk is eliminated. Furthermore, by opening the opening with a sliding door, the hold curtain stored in the storage compartment can be pulled out from the storage compartment towards the ship's hold. Furthermore, since the sliding door can be automatically moved up and down by the sliding door drive mechanism, opening and closing the storage compartment becomes easier.
[0015] Furthermore, in the above configuration of the present invention, the guide rail may be provided at a position that sandwiches the cargo hold in the width direction of the hull and on the outside of the cargo hold.
[0016] If guide rails are installed inside the ship's hold, foreign objects such as scrap metal or other cargo stored in the hold may get into the guide rails, which could not only prevent the hold curtain from moving smoothly but also damage the guide rails. Therefore, with the above configuration, since the guide rail is provided on the outside of the cargo hold, it is possible to prevent foreign objects from entering the guide rail from the cargo hold, thereby ensuring smooth movement of the hold curtain and preventing damage to the guide rail.
[0017] Furthermore, in the above configuration of the present invention, the guide rail is housed in a guide rail housing provided on the outside of the ship's hold. Support members are attached to both edges in the width direction of the hold curtain, respectively, to rotatably support rollers that can roll on the guide rail. A slit is provided in the wall portion forming the guide rail housing portion for inserting the support member into the guide rail housing portion, and the width of this slit may be 10 mm to 30 mm.
[0018] With this configuration, the guide rails are housed in a guide rail housing located on the outside of the ship's hold, thus protecting the guide rails. In addition, since support members that rotatably support rollers capable of rolling on the guide rails are respectively attached to both edge portions in the width direction of the hold curtain, as the rollers roll on the guide rails, the support members smoothly move along the guide rails, and thereby, the hold curtain can be smoothly moved along the guide rails.
[0019] Also, since the width of the slit provided in the wall portion forming the guide rail housing portion is 10 mm to 30 mm, the support member can move along the guide rail without interfering with the edge portion of the slit and preventing foreign matters such as scraps from entering the guide rail through the slit. Here, the reason for defining the width of the slit to be 10 mm to 30 mm is that if the width of the slit is less than 10 mm, there is a risk that the support member may hit and interfere with the edge portion of the slit due to dimensional errors of the guide rail and the support member, and if it exceeds 30 mm, there is a risk that foreign matters such as scraps may enter the guide rail through the slit.
[0020] In addition, in the above-described configuration of the present invention, a prevention sheet may be provided on the wall portion forming the guide rail housing portion so as to be slidable relative to the upper surface of the hold curtain, thereby preventing foreign matters from entering the slit.
[0021] [[ID=1A]]According to such a configuration, since the prevention sheet can prevent foreign matters from entering from the upper surface side of the hold curtain, the hold curtain can be smoothly moved along the guide rail.
[0022] In addition, in the above-described configuration of the present invention, a partition wall may be provided below the opening of the storage portion, and a loading and unloading port through which a loading vehicle can pass may be provided in the partition wall, and the loading and unloading port may be openable and closable by an opening and closing door.
[0023] It should be noted that there was a minor error in the original text where "1A" was used instead of "14" in the English translation for clarity. The corrected translation for that line is provided above.With this configuration, by opening the loading / unloading ports with opening / closing doors, cargo handling vehicles can easily load fixing members and other components that support and secure cargo to the ship's hold into the ship's hold, and unnecessary components can be easily removed. By closing the loading / unloading ports with opening / closing doors, cargo handling vehicles and other components can be prevented from entering the ship's hold during cargo transport, etc. Furthermore, if the cargo is bulk cargo, closing the loading / unloading ports with opening / closing doors can prevent the bulk cargo from leaving the ship's hold through the loading / unloading ports.
[0024] Furthermore, in the above configuration of the present invention, the opening and closing door may be opened and closed by rotating up and down about the lower end of the opening and closing door as an axis by an opening and closing door drive mechanism.
[0025] With this configuration, the opening and closing door is rotated up and down around the lower end of the door as an axis by the opening and closing door drive mechanism, thereby opening and closing the loading and unloading exit, making it easy to open and close the loading and unloading exit. [Effects of the Invention]
[0026] According to the present invention, when the hold curtain that opens and closes the hold hatch is open, the hold curtain is folded and stored in the storage compartment, thus preventing the hold curtain from being damaged by foreign objects such as scrap metal or other cargo stored in the ship's hold. [Brief explanation of the drawing]
[0027] [Figure 1] This is a perspective view of the main part illustrating an embodiment of the present invention, showing a simulated state in which the opening of a ship's hold is covered and closed by a hold curtain. [Figure 2] This is a perspective view of the main part, simulating the state in which the hold curtain is stored in the storage compartment. [Figure 3] This is a side view of the main section showing the ship's hold. [Figure 4] This is a plan view showing the general configuration of the cargo ship. [Figure 5](a) A cross-sectional view showing the guide rail and its vicinity, and (b) An enlarged view of the X-shaped section in (a). [Figure 6] This is a schematic side view illustrating the hold curtain drive mechanism that moves the hold curtain along the guide rail. [Figure 7] This is a schematic perspective view showing the hold curtain drive mechanism that moves the hold curtain along the guide rail. [Figure 8] This is a perspective view showing the support member that supports the hold curtain. [Figure 9] This is a front view of the main part showing the storage compartment opening closed by the sliding door. [Figure 10] This is a view from the direction of line AA in Figure 9. [Figure 11] This is a view from the direction of the arrow BB in Figure 9. [Figure 12] The same shows a holding mechanism for holding the sliding door in an upward position, with (a) being a plan view, (b) being an enlarged view of the X circle in (a), and (c) being an enlarged view of the Y circle in (a). [Figure 13] Similarly, (a) is a front view of the opening and closing door that opens and closes the loading and unloading area, (b) is a top view of (a), and (c) is a side view of (a). [Figure 14] This is a side view showing the door opening and closing mechanism. [Figure 15] This is a cross-sectional view showing the guide rail and its vicinity in another first example. [Figure 16] Cross-sectional view showing the guide rail and its vicinity in another second example. [Modes for carrying out the invention]
[0028] Embodiments of the present invention will be described below with reference to the drawings. Figures 1 to 4 show the cargo ship of this embodiment. Figure 1 is a perspective view of the main part showing the cargo hold opening covered and closed by a hold curtain, Figure 2 is a perspective view of the main part showing the hold curtain stored in the storage compartment, Figure 3 is a side view of the main part showing the cargo hold, and Figure 4 is a plan view showing the schematic configuration of the cargo ship.
[0029] As shown in Figures 1 to 4, the cargo ship 10 of this embodiment comprises a hull 11, a cargo hold 12 provided in the hull 11, and a hold curtain 13 for opening and closing the cargo hold opening 12a of the cargo hold 12. A hatch coaming 14 (see Figures 1 and 2) is provided at the upper end of the cargo hold opening 12a to prevent water from entering the cargo hold 12. In Figures 1 to 4, the direction of arrow A is the bow direction. Also, the hold curtain 13 is not shown in Figure 3.
[0030] Furthermore, the cargo ship 10 is equipped with a storage section 15 in which the hold curtain 13 can be stored in a folded state, and guide rails 16 that movably support both edges of the hold curtain 13 in the width direction. The storage compartment 15 is located on the bow side of the hull 11 and has a rectangular opening 15a that opens toward the cargo hold 12. The opening 15a is located substantially flush with the surface of the wall 20 located on the bow side of the cargo hold 12. Guide rails 16 are provided on each of the widthwise sides of the hull 11, extending to the storage section 15, and are designed to movably support both widthwise edges of the hold curtain 13. The hold curtain 13 moves along the guide rails 16 and is folded and stored in the storage section 15 (see Figure 2).
[0031] Furthermore, as shown in Figure 4, the guide rail 16 is positioned to sandwich the cargo hold 12 in the width direction of the hull 11 and is located on the outside of the cargo hold 12. As shown in Figure 5, this guide rail 16 is housed in a guide rail housing section 17 located on the outside of the cargo hold 12 (left side in Figure 5). This guide rail 16 is erected on the inner surface of the wall portion 17a of the wall portion forming the guide rail housing section 17 that faces the cargo hold 12, at a slight inclination with respect to the horizontal plane.
[0032] Furthermore, support members 18 are attached to both edges in the width direction of the hold curtain 13 (only one edge is shown in Figure 5). The support members 18 are inserted into slits 19 formed in the wall portion 17a, and the main body portion 18a is housed in the guide rail housing portion 17. The main body portion 18a is formed in a roughly U-shape in cross-section, and rollers 21 capable of rolling the guide rail 16 are mounted inside this main body portion 18a so as to be rotatable in forward and reverse directions. Furthermore, a cylindrical insertion portion 18b through which a wire 29, described later, is inserted is fixed to the lower surface of the support member 18. Furthermore, the base end of the support member 18 protrudes from the slit 19, and this protruding base end is attached to the edge of the hold curtain 13 by screw fastening.
[0033] The width h of the slit 19 is wider than the thickness of the base end of the support member 18 and is set to 10 mm to 30 mm. The reason for specifying the width of the slit 19 to 10 mm to 30 mm is that if the width of the slit 19 is less than 10 mm, the support member 18 may hit the edge of the slit 19 and interfere with it due to dimensional errors in the guide rail 16 and the support member 18, and if it exceeds 30 mm, there is a risk that foreign objects such as scrap may enter the guide rail 16 through the slit 19. Furthermore, the wall portion 17a forming the guide rail housing portion 17 is provided with a protective sheet 22 that slidably contacts the upper surface of the hold curtain 13 to prevent foreign matter from entering the slit 19. This protective sheet 22 is formed to be curved in cross-sectional view and extends along the length direction of the hold curtain 13.
[0034] Furthermore, the hold curtain 13 is automatically moved along the guide rail 16 by the hold curtain drive mechanism 25 and folded and stored in the storage section 15. The hold curtain drive mechanism 25, as schematically shown in Figures 6 and 7, includes a vertical pulley 26 located on the stern side and a winch drum 27 located on the bow side. The winch drum 27 is installed at the rear of the storage compartment 15 (see Figures 1, 2, and 4), and a wire 29 wound around this winch drum 27 extends toward the pulley 26 and is wound around the pulley 26. As described above, the roller 21 is capable of rolling on the guide rail 16, and the hold curtain 13 is attached to the support member 18 that supports the roller 21.
[0035] Furthermore, as shown in Figure 7, multiple horizontal pulleys 26a and multiple vertical pulleys 26b are arranged between the leading pulley 26 and the winch drum 27, and the direction of the wire 29 is changed by winding the wire 29 around these pulleys 26a and 26b. Furthermore, as shown in Figure 8, the wire 29 is inserted through the insertion portion 18b of the support member 18, the insertion portion 18b of the leading support member 18 is fixed to the wire 29 by fasteners 18c, 18c such as clips, and the rear support member 18 is fixed in the storage section 15 to one end of the guide rail 16 on the bow side or in its vicinity (see Figure 6).
[0036] In a hold curtain drive mechanism with this configuration, as shown in Figures 6 and 7, when the winch drum 27 is rotated in one direction such that the pulleys 26, 26 rotate counterclockwise, the wire 29 moves in the direction of the arrow. As a result, the leading support member 18 moves in the direction of the arrow, and the support members 18 behind it move while being pulled in the direction of the arrow by the hold curtain 13. As a result, the hold curtain 13 moves in the direction of the arrow, unfolding from its folded state, and comes out of the storage section 15 (see Figures 1 and 2), closing the opening 12a of the ship's hold 12.
[0037] On the other hand, when the winch drum 27 is rotated in another direction such that the pulleys 26, 26 rotate clockwise, the wire 29 moves in the opposite direction to the arrow. As a result, the leading support member 18 moves in the opposite direction to the arrow, and the support members 18 behind it are pushed in the opposite direction to the arrow by the leading support member as they move. As a result, the hold curtain 13 moves in the opposite direction to the arrow while being folded, and is stored in the storage section 15 (see Figures 1 and 2) in a folded state.
[0038] Furthermore, as shown in Figures 1 and 2, the cargo ship of this embodiment is equipped with a sliding door 30 that can be opened and closed by sliding the opening 15a of the storage compartment 15 up and down. The sliding door 30 is formed from a rectangular steel plate when viewed from the front, and its length and width are slightly longer than the length and width of the opening 15a.
[0039] Figure 9 is a front view showing the opening 15a of the storage compartment 15 closed by the sliding door 30, and shows the left half of the opening 15a. Figure 10 is a view taken along line AA in Figure 9, and Figure 11 is a view taken along line BB in Figure 9. Note that Figure 11 shows the opening 15a in the closed state. The sliding door 30 slides up and down automatically by the sliding door drive mechanism 31. Specifically, guide rails 31a are provided on both the left and right sides of the opening 15a (left side in Figure 9), extending upwards and downwards, allowing the sliding door 30 to slide up and down along these guide rails 31a. When the sliding door 30 is in its uppermost position, it closes the opening 15a, and when it is in its lowermost position, it opens the opening 15a.
[0040] Furthermore, an electric winch 32 is fixed to the floor surface (second deck floor surface) 12c in the area below the opening 15a. Four electric winches 32 are arranged at predetermined intervals in the width direction (left-right direction in Figure 9) of the sliding door 30. Note that Figure 9 shows two of the four electric winches 32.
[0041] Furthermore, a pulley 33 is rotatably mounted on the frame above the opening 15a, and a wire 34, which is wound up and unwound by an electric winch 32, is wound around this pulley 33. The tip of this wire 34 is fixed to the sliding door 30. As shown in Figure 11, two pulleys 33 are provided spaced apart in a direction perpendicular to the opening 15a (left-right direction in Figure 11), and the electric winch 32 is provided below the pulley 33 on the far side (right side in Figure 11). Therefore, when the electric winch 32 winds up the wire 34 that is wrapped around the pulleys 33, 33, the sliding door 30 slides upward as a result, and when the wire 34 is unwound, the sliding door 30 slides downward as a result. As shown in Figure 10, when the sliding door 30 slides downward and is in the lower position, the opening 15a is opened, and as shown in Figure 11, when the sliding door 30 slides upward and is in the upper position, the opening 15a is closed.
[0042] Furthermore, in this embodiment, as shown in Figure 12, a holding means 35 is provided to hold the sliding door 30 in an upward position. The retaining means 35 is provided with a locking bolt 36 and a fall prevention bolt 37 on the upper end surface of the wall portion 20a located below the opening 15a. Multiple locking bolts 36 and fall prevention bolts 37 are provided at predetermined intervals in the width direction (left-right direction in Figure 12(a)) of the wall portion 20a.
[0043] The locking bolt 36 prevents the sliding door 30 from moving out of position when the sliding door 30 is in the upper position. The upper part of the sliding door 30 is held down from the surface by a vertical frame 36 fixed to the upper end of the opening 15a, as shown in Figure 11. The fall prevention bolt 37 fits into the lower part of the sliding door 30 when the sliding door 30 is in the upper position to prevent the sliding door 30 from falling.
[0044] As shown in Figure 12(b), receiving members 36a, 36a are fixed coaxially to the upper end surface of the wall portion 20a, spaced apart in the axial direction, at the position where the locking bolt 36 is positioned. In addition, a receiving member 36b is fixed coaxially to the back surface of the sliding door 30, along with receiving member 36a. The locking bolt 36 is inserted through the receiving members 36a, 36a, 36b and is rotatable in both forward and reverse directions around its axis. Furthermore, the locking bolt 36 has two locking rods 36c and 36d that extend in a direction perpendicular to its axis and are spaced apart in the axial direction. The receiving member 36b has a fitting groove 36e into which the locking rod 36d fits.
[0045] Then, as shown in Figure 12(b), by rotating the locking bolt 36 so that the locking rod 36c contacts the end face of the receiving member 36a on the side closer to the receiving member 36b, and by fitting the locking rod 36d into the fitting groove 36e of the receiving member 36b, the sliding door 30 is prevented from deviating in the planar direction. Furthermore, by rotating the locking bolt 36 from this locked position to disengage the locking rod 36d from the fitting groove 36e, and by positioning the locking rod 36c axially opposite the grooves 36f, 36f formed in the receiving members 36a, 36a that extend axially, and then pulling the locking bolt 36 out of the receiving member 36b, the lock on the sliding door 30 is released, and the sliding door 30 becomes capable of sliding downward.
[0046] Furthermore, as shown in Figure 12(c), receiving members 37a and 37b are fixed coaxially to the upper end surface of the wall portion 20a, spaced apart in the axial direction, at the position where the fall prevention latch 37 is to be positioned. Also, a receiving member 37c is fixed coaxially to the back surface of the sliding door 30, along with the receiving members 37a and 37b. The fall prevention latch 37 is inserted through the receiving members 37a, 37b, and 37c, and is rotatable in both forward and reverse directions around its axis. Furthermore, the fall prevention latch 37 has a locking rod 37d that extends in a direction perpendicular to its axis.
[0047] Then, as shown in Figure 12(c), by rotating the fall prevention bolt 37 and bringing the locking rod 37d into contact with the end face of the receiving member 37b, the fall prevention bolt 37 is inserted into the receiving member 37c in a state where it is prevented from being pulled out of the receiving member 37c, thereby preventing the sliding door 30 from falling. Furthermore, by rotating the fall prevention latch 37 from this fall prevention position to detach the locking rod 37d from the end face of the receiving member 37b and pulling the fall prevention latch 37 out of the receiving member 37c, the sliding door 30 becomes capable of sliding downwards.
[0048] Furthermore, in this embodiment, as shown in Figures 1 and 2, a wall (partition wall) 20 is provided below the opening 15a of the storage section 15. An loading / unloading exit 40 is provided in this partition wall 20. This loading / unloading exit 40 is sized to allow cargo handling vehicles such as forklifts to pass through, and the lower end of the loading / unloading exit 40 is almost flush with the floor surface 12b of the ship's hold 12. The loading / unloading exit 40 can also be opened and closed by an opening / closing door 41.
[0049] In other words, as shown in Figure 13, the opening and closing door 41 has a door body 41a formed from a rectangular plate-shaped steel plate, and reinforcing steel members 41b fixed to the surface side of the door body 41a, with the reinforcing steel members 41b arranged vertically and horizontally. Such an opening / closing door 41 opens and closes the loading / unloading port 40 by rotating up and down on its lower end as an axis by an opening / closing door drive mechanism 42. Specifically, pulleys 43a and 43b are rotatably mounted above the opening / closing door 41, and a wire 44 is wound around these pulleys 43a and 43b. One end of the wire 44 is connected to the opening / closing door 41 via a connecting member 41c fixed to the upper end of the opening / closing door 41, and the other end is connected to an electric winch (not shown).
[0050] Furthermore, as shown in Figure 14, hinges 46, 46 are provided on the floor surface 12b at positions opposite to the lower end of the opening / closing door 41, spaced apart in the width direction of the opening / closing door 41, and the lower end of the opening / closing door 41 is connected to these hinges 46, 46. This allows the opening / closing door 41 to rotate up and down around the hinges 46, 46 as axes, enabling the loading / unloading entrance / exit 40 to be opened and closed. Furthermore, a stopper 47a is fixed to the floor surface 12b on the back side (right side in Figure 14) of the opening / closing door 41, and this stopper 47a abuts against the lower end of the back side of the opening / closing door 41. Also, a stopper 47b is fixed to the wall located above the loading / unloading exit 40 on the back side of the opening / closing door 41, and this stopper 47b abuts against the upper end of the back side of the opening / closing door 41. When the lower end of the back side of the opening / closing door 41 abuts against the stopper 47a and the upper end of the back side of the opening / closing door 41 abuts against the stopper 47b, the opening / closing door 41 is perpendicular to the floor surface 12b.
[0051] Then, the opening / closing door 41 rotates downward on its hinge 46 axis from a position perpendicular to the floor surface 12b toward the floor surface 12d on the opposite side of the ship's hold 12 and the loading / unloading port 40, and at its lowest position, the upper end of the opening / closing door 41 comes into contact with the floor surface 12d. As a result, the loading / unloading port 40 is opened. Furthermore, from this open position, the opening / closing door 41 rotates around the hinge portion 46 as an axis, and at its highest position, the upper end of the opening / closing door 41 comes into contact with the stopper 47b, and the lower end of the opening / closing door 41 comes into contact with the stopper 47a. As a result, the loading / unloading exit 40 is closed by the opening / closing door 41.
[0052] Furthermore, a snatch pulley 48 is connected to the underside of the floor surface 11b (the floor surface of the second deck) which is above the floor surface 12d. This snatch pulley 48 is rotatably mounted on the underside of the floor surface 11b on the warehouse side (left side in Figure 14) from the opening / closing door 41 when the loading / unloading port 40 is closed. The warehouse is located on the opposite side of the loading / unloading port 40 from the ship's hold 12. On the other hand, a snatch pulley 49 is rotatably connected to the upper end of the opening / closing door 41 via a connecting member 41c fixed to the upper end of the opening / closing door 41, and this snatch pulley 49 and snatch pulley 48 are connected by a wire 49a.
[0053] Therefore, when the wire 44 is unwound by an electric winch (not shown) from the vertical position where the loading / unloading port 40 is closed, the upper end of the loading / unloading port 41 is pulled forward by the snatch pulley 49, and the loading / unloading port 41 rotates downward on the hinges 46, 46 as the wire 49a of the snatch pulley 49 is unwound, causing the upper end of the loading / unloading port 41 to come into contact with the floor surface 12d, making the loading / unloading port 41 nearly horizontal and opening the loading / unloading port 40.
[0054] On the other hand, when the opening / closing door 41 is in a nearly horizontal position, opening the loading / unloading port 40, the wire 44 is wound up by an electric winch (not shown). As the upper end of the opening / closing door 41 is pulled upward by the snatch pulley 49, the opening / closing door 41 rotates upward around the hinges 46, 46 as the wire 49a of the snatch pulley 49 is wound up, causing the upper end of the opening / closing door 41 to come into contact with the stopper 47b and the lower end of the opening / closing door 41 to come into contact with the stopper 47a, so that the opening / closing door 41 becomes nearly vertical, and the loading / unloading port 40 is closed by the opening / closing door 41.
[0055] Furthermore, the opening and closing door 41 can be locked in the position where the loading and unloading port 40 is closed. That is, as shown in Figure 13, multiple locking parts 50 are provided at predetermined intervals along the periphery of the loading and unloading port 40 on the wall portion 20 located outside the loading and unloading port 40. The locking mechanism 50 includes a support portion 50a fixed to the wall portion 20, and a locking lever 50b mounted on the support portion 50a so as to be rotatable in forward and reverse directions around its axis.
[0056] Then, by rotating the lock lever 50b and pressing its tip against the periphery of the opening / closing door 41 against the wall 20, the opening / closing door 41 is locked in the position that closes the loading / unloading port 40. On the other hand, by rotating the lock lever 50b from this closed position and releasing its tip from the wall 20, the lock on the opening / closing door 41 is released, and thereafter the opening / closing door 41 can rotate downward on the hinges 46, 46 as axes, that is, the loading / unloading port 40 can be opened.
[0057] As described above, according to this embodiment, when the opening 12a of the ship's hold 12 is opened, the hold curtain 13 moves along the guide rail 16 and is folded and stored in the storage section 15, so it is not left unattended in the ship's hold 12. Therefore, it is possible to prevent the hold curtain 13 from being damaged by foreign objects such as parts of the cargo, including scrap, stored in the ship's hold 12, or by lifting equipment used to hoist the cargo. Furthermore, since the hold curtain 13 is not left in the ship's hold 12, the ship's hold can be filled to capacity with cargo.
[0058] Furthermore, since the opening 15a of the storage compartment 15 is equipped with a sliding door 30 that can be opened and closed by sliding it up and down, the opening 15a of the storage compartment 15 in which the hold curtain 13 is stored can be closed with the sliding door 30, thereby preventing cargo from entering the storage compartment 15 from the opening 15a and preventing damage to the hold curtain 13 stored in the storage compartment 15. In particular, if the cargo is bulk cargo, if the opening 15a is left open, there is a risk that foreign objects such as scrap and other parts of the bulk cargo may enter the storage compartment 15 from the opening 15a, but this risk is eliminated by closing the opening 15a with the sliding door 30.
[0059] Furthermore, since the guide rail 16 is positioned to sandwich the cargo hold 12 in the width direction of the hull 11 and is located on the outside of the cargo hold 12, it is possible to prevent foreign objects from entering the guide rail 16 from the cargo hold 12, thereby ensuring the smooth movement of the hold curtain 13 and preventing damage to the guide rail 16.
[0060] Furthermore, since the guide rail 16 is housed in a guide rail housing section 17 located on the outside of the ship's hold 12, the guide rail 16 can be protected. Furthermore, since support members 18 that rotatably support rollers 21 capable of rolling along the guide rail 16 are attached to both edges in the width direction of the hold curtain 13, the support members 18 move smoothly along the guide rail 16 as the rollers 21 roll along the guide rail 16, thereby allowing the hold curtain 13 to move smoothly along the guide rail 16.
[0061] Furthermore, since the width of the slit 19 provided in the wall portion 17a forming the guide rail housing portion 17 is 10 mm to 30 mm, the support member 18 can move along the guide rail 16 without interfering with the edge of the slit 19 and without preventing scrap from entering the guide rail 16 through the slit 19.
[0062] Furthermore, a protective sheet 22 is provided on the wall portion 17a forming the guide rail housing portion 17, which slides relative to the upper surface of the hold curtain 13 to prevent foreign matter from entering the slit 19. Therefore, the protective sheet 22 prevents foreign matter from entering the hold curtain 13 from the upper side, and thus the hold curtain 13 can move smoothly along the guide rail 16.
[0063] Furthermore, a partition wall 20 is provided below the opening 15a of the storage section 15, and an loading / unloading port 40 is provided in the partition wall 20 through which a cargo handling vehicle can pass. Since the loading / unloading port 40 can be closed by an opening / closing door 41, cargo handling vehicles can easily load fixing members and other members that support and secure the cargo to the ship's hold 12 into the ship's hold 12 through the loading / unloading port 40, and unnecessary members can be easily removed. Furthermore, if the cargo is bulk cargo, closing the loading / unloading port 40 with the opening / closing door 41 prevents the bulk cargo from leaving the ship's hold 12 through the loading / unloading port 40.
[0064] In this embodiment, as shown in Figure 5, the system is configured to open and close one hold curtain 13. However, if the length of the cargo hold 12 in the longitudinal direction of the hull increases due to the enlargement of the hull 11, then, as shown in Figure 15, two hold curtains 13, 13 can be used, with one hold curtain 13 opening and closing the bow half of the cargo hold opening 12a of the cargo hold 12, and the other hold curtain 13 opening and closing the stern half of the cargo hold opening 12a of the cargo hold 12.
[0065] In this case, as shown in Figure 15, the guide rail housing section 17 is expanded vertically, and guide rails 16, 16 are arranged in two stages, one above the other, inside it. One hold curtain 13 is attached to a support member 18 that moves along one guide rail 16, and the other hold curtain 13 is attached to a support member 18 that moves along the other guide rail 16. Furthermore, storage compartments 15 are provided on both the bow and stern sides of the ship. One guide rail 16 is positioned to extend from approximately the halfway point in the longitudinal direction of the ship's hold 12 to one storage compartment 15, and the other guide rail 16 is positioned to extend from approximately the halfway point in the longitudinal direction of the ship's hold 12 to the other storage compartment 15. One hold curtain 13 is stored in one storage compartment 15, and the other hold curtain 13 is stored in the other storage compartment 15.
[0066] Furthermore, in this embodiment, as shown in Figure 5, the guide rail 16 is housed in a guide rail housing 17, and a slit 19 for inserting a support member 18 is formed in the wall portion 17a that forms the guide rail housing 17, in order to prevent scrap in the cargo hold 12 from entering the guide rail 16 through the slit 19. However, if the cargo ship is a ship that mainly transports steel materials, the cargo will not come into contact with the guide rail, then, as shown in Figure 16, a guide rail 56 with a T-shaped cross section may be fixed to the wall portion 45 located on the outside of the cargo hold 12 without providing a guide rail housing 17, and a hold curtain 13 may be attached to the support member 18 that supports the roller 21 that rolls along this guide rail 56.
[0067] Although embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the embodiments described above and can include various modifications. For example, the embodiments described above are described in detail to make the present invention easy to understand and are not necessarily limited to those having all the configurations described. Furthermore, it is possible to replace some of the configurations of the embodiments with other configurations, and it is also possible to add other configurations to the configurations of the embodiments. In addition, it is possible to add, delete, or replace some of the configurations of the embodiments with other configurations. [Explanation of Symbols]
[0068] 10 cargo ship 11 Hull 12 Hold 12a Port 13 Hold Curtain 15 Storage compartment 15a opening 16.56 Guide rail 17 Guide rail housing 18 Support Member 20 Wall 22 Prevention sheet 30 Sliding Doors 31. Sliding door drive mechanism 40 Loading / unloading 41 Opening and closing doors 42 Door opening / closing drive mechanism
Claims
1. A cargo ship comprising a hull, a cargo hold provided in the hull, and a hold curtain for opening and closing the opening of the cargo hold, A storage compartment provided on the bow and / or stern side of the hull, capable of storing the hold curtain in a folded state, Guide rails are provided on each of the widthwise sides of the hull, extending to the storage section, and movably supporting both widthwise edges of the hold curtain, It comprises a hatch coaming provided at the upper end of the opening of the cargo hold to prevent water from entering the cargo hold, The storage unit has a storage space on the outside of the ship's hold through an opening to store the hold curtain inside so that it is not left in the ship's hold, and the end of the guide rail extends through this storage space. The aforementioned hold curtain moves along the guide rail and is folded and stored in the storage compartment. A cargo ship characterized by having a sliding door that can be opened and closed by sliding the opening of the storage compartment up and down.
2. The cargo ship according to claim 1, characterized in that the sliding door moves up and down by a sliding door drive mechanism.
3. A cargo ship comprising a hull, a cargo hold provided in the hull, and a hold curtain for opening and closing the opening of the cargo hold, A storage compartment provided on the bow and / or stern side of the hull, capable of storing the hold curtain in a folded state, Guide rails are provided on each of the widthwise sides of the hull, extending to the storage section, and movably supporting both widthwise edges of the hold curtain, It comprises a hatch coaming provided at the upper end of the opening of the cargo hold to prevent water from entering the cargo hold, The storage unit has a storage space on the outside of the ship's hold through an opening to store the hold curtain inside so that it is not left in the ship's hold, and the end of the guide rail extends through this storage space. The aforementioned hold curtain moves along the guide rail and is folded and stored in the storage compartment. The guide rail is provided on the outside of the ship's hold at a position that sandwiches the ship's hold in the width direction of the ship's hull. The aforementioned guide rail is housed in a guide rail housing located on the outside of the ship's hold. Support members are attached to both edges in the width direction of the hold curtain, respectively, to rotatably support rollers that can roll on the guide rail. A cargo ship characterized in that a slit is provided in the wall portion forming the guide rail housing portion for inserting the support member into the guide rail housing portion, and the width of this slit is 10 mm to 30 mm.
4. The cargo ship according to claim 3, characterized in that a protective sheet is provided on the wall portion forming the guide rail housing portion, which is slidably in contact with the upper surface of the hold curtain to prevent foreign matter from entering the slit.
5. A cargo ship comprising a hull, a cargo hold provided in the hull, and a hold curtain for opening and closing the opening of the cargo hold, A storage compartment provided on the bow and / or stern side of the hull, capable of storing the hold curtain in a folded state, Guide rails are provided on each of the widthwise sides of the hull, extending to the storage section, and movably supporting both widthwise edges of the hold curtain, It comprises a hatch coaming provided at the upper end of the opening of the cargo hold to prevent water from entering the cargo hold, The storage unit has a storage space on the outside of the ship's hold through an opening to store the hold curtain inside so that it is not left in the ship's hold, and the end of the guide rail extends through this storage space. The aforementioned hold curtain moves along the guide rail and is folded and stored in the storage compartment. A partition wall is provided below the opening of the storage compartment. The aforementioned partition wall is provided with an entrance / exit through which a cargo handling vehicle can pass. A cargo ship characterized in that the loading and unloading ports can be opened and closed by doors.
6. The cargo ship according to claim 5, characterized in that the opening and closing door rotates up and down about the lower end of the opening and closing door as an axis by an opening and closing door drive mechanism to open and close the loading and unloading port.
Citation Information
Patent Citations
Hatch cover device
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