Cargo handling device and waterproof sheet

Abstract

To provide a cargo handling device or the like capable of preventing water such as rainwater from entering a hold while maintaining operability of a conveyance part that conveys a cargo between the inside and outside of the hold.SOLUTION: A landing part 9 includes: a bucket elevator 92 for conveying a bulk cargo M between the inside and outside of a hold 201, and a waterproof sheet 6 for covering the bucket elevator 92 and a hatch 21 of the hold 201. An upper support part 93 is provided which supports the bucket elevator 92 from above, and an upper part 62 of the waterproof sheet 6 is attached to a sheet upper part attachment position 64 on the upper support part 93. The upper part 62 of the waterproof sheet 6 is attached to the sheet upper part attachment position 64 via a wire 63, and the wire 63 is pulled up together with the waterproof sheet 6 when loading and unloading is performed by the landing part 9.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a cargo handling device for handling ship cargo and the like.

Background Art

[0002] As cargo handling machines for handling ship cargo, which is the cargo or load of a ship, a loading machine for loading ship cargo into a ship's hold and an unloading machine for unloading ship cargo from the ship's hold to land are known. Among the loading machines, those for loading bulk cargo or loose loads such as coal and iron ore are also called ship loaders, and among the unloading machines, those for unloading loose loads are also called ship unloaders. The present disclosure is applicable to any marine cargo handling device including a loading machine such as a ship loader and an unloading machine such as a ship unloader, but will be illustratively and representatively described mainly with respect to an unloading machine or a ship unloader. A ship unloader is also called a continuous unloader or a continuous ship unloader in the sense of continuously unloading bulk cargo in a ship's hold. In the present disclosure, its abbreviation CSU is used.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Patent Document 1 discloses covering the hatch of a ship's hold with a lid member in order to prevent the ship cargo from getting wet in the rain during loading in rainy weather. In this configuration, the loading section (shoot section 8 in Patent Document 1) for loading ship cargo into the ship's hold has to be arranged avoiding the lid member, resulting in a decrease in the mobility of the loading section and the efficiency of the loading operation.

[0005] The present disclosure has been made in view of such circumstances, and an object thereof is to provide a cargo handling device or the like that can prevent water such as rainwater from entering the cargo hold while maintaining the workability of a conveying unit that conveys cargo between the inside and outside of the cargo hold.

Means for Solving the Problems

[0006] In order to solve the above problems, a cargo handling device according to an aspect of the present disclosure includes a conveying unit that conveys cargo between the inside and outside of a cargo hold, and a waterproof sheet that covers the conveying unit and the hatch of the cargo hold.

[0007] According to this aspect, it is possible to prevent water such as rainwater from entering the cargo hold by means of a waterproof sheet that covers the hatch of the cargo hold. Further, the conveying unit in the cargo handling device can perform cargo handling work similar to that in sunny weather or the like while being covered by the waterproof sheet.

[0008] Another aspect of the present disclosure is a waterproof sheet. This waterproof sheet covers a conveying unit in a cargo handling device that conveys cargo between the inside and outside of a cargo hold and a hatch of the cargo hold. This waterproof sheet includes an attachment portion to which a long member for attaching the waterproof sheet to the cargo handling device is attached.

[0009] Note that any combination of the above components, or those obtained by converting these expressions into methods, devices, systems, recording media, computer programs, etc., are also included in the present disclosure.

Effects of the Invention

[0010] According to the present disclosure, it is possible to prevent water such as rainwater from entering the cargo hold while maintaining the workability of a conveying unit that conveys cargo between the inside and outside of the cargo hold.

Brief Description of the Drawings

[0011]

Figure 1

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Modes for Carrying Out the Invention

[0012] Hereinafter, embodiments for implementing the present disclosure (hereinafter also referred to as embodiments) will be described in detail with reference to the drawings. In the description and / or drawings, the same or equivalent components, members, processes, etc. are denoted by the same reference numerals, and redundant descriptions are omitted. The scales and shapes of the respective parts shown are set for the sake of simplicity of description and are not to be construed in a limited manner unless otherwise specified. The embodiments are examples and do not limit the scope of the present disclosure in any way. All features presented in the embodiments and combinations thereof are not necessarily essential to the present disclosure. The embodiments are presented, for convenience, decomposed into components for each function and / or function group for realizing them. However, one component in the embodiments may actually be realized by a combination of a plurality of components as separate entities, or a plurality of components in the embodiments may actually be realized by one component as an integral entity.

[0013] FIG. 1 shows the overall configuration of a cargo handling machine, a cargo unloader 1, according to an embodiment of the present disclosure. The cargo unloader 1 is a continuous unloader or a ship continuous unloader that unloads the cargo loaded on a ship 200 or the bulk cargo M as ship cargo onto land. Hereinafter, the cargo unloader 1 is also referred to as CSU1. CSU1 continuously unloads the bulk cargo M stored in the cargo hold 201 of the ship 200 moored to the quay wall 101 of a quay 102 such as a port onto land. Examples of general bulk cargo M include coal, coke, ore, etc. In the present embodiment in which a waterproof sheet capable of preventing the bulk cargo M from getting wet by rain is used, bulk cargo M vulnerable to water such as wood pellets like white pellets and grains is suitable.

[0014] CSU1 is operated by an operator in the main operation room 16 provided in its main body. The operation room for operating CSU1 may be provided at other locations within CSU1 or at any location on land outside CSU1.

[0015] The quay 102 where the ship 200 docks constitutes the land where the bulk cargo M is unloaded and is made of high-strength materials such as reinforced concrete. As shown in the perspective view of FIG. 2, a pair of parallel rails 3 are provided on the quay 102 as a line along the longitudinal direction of the ship 200 (the direction perpendicular to the plane of the paper in FIG. 1) that is docked against the quay wall 101. The rails 3 constitute a track on which the traveling part 2 as the moving part of the CSU1 can move or travel. By means of these rails 3, the CSU1 can move relative to the docked ship 200. As shown in FIG. 2, the installation direction of the rails 3 preferably coincides with the longitudinal direction of the docked ship 200 or the quay wall 101, but any other direction is also possible. Also, the rails 3 may include curved parts or bent parts. When unloading the cargo from the ship 200, the CSU1 moves on the rails 3 and approaches the hatch 21 as the upper opening of the cargo hold 201 to be unloaded. Thereafter, the traveling part 2, the swivel frame 5, the unloading part 9, etc. are driven, and the bulk cargo M is unloaded from the cargo hold 201.

[0016] A belt conveyor 45 as a conveyor for transporting the unloaded bulk cargo M in a certain direction is provided between the pair of rails 3 on the quay 102. As shown in FIG. 2, the installation direction of the belt conveyor 45, that is, the transport direction, preferably coincides with the installation direction of the rails 3, but any other direction is also possible. Also, the belt conveyor 45 may include curved parts or bent parts. The belt conveyor 45 needs to be provided between the pair of rails 3 at the place where it receives the bulk cargo M unloaded from the CSU1, but it may be provided outside the pair of rails 3 at other places.

[0017] The CSU1 includes a traveling part 2 as a moving part that can move relative to the ship 200, a swivel frame 5 as a swivel part that can swivel relative to the traveling part 2, and an unloading part 9 as a cargo handling device or unloading device provided at the tip side of the swivel frame 5 for unloading the bulk cargo M. The swivel frame 5 is supported on the traveling part 2 so as to be swivellable around a swivel axis in the vertical direction (the up-and-down direction in FIG. 1). A boom 7 extending in the lateral direction intersecting the swivel axis is provided on the swivel frame 5, and a bucket elevator as a transport part constituting the main part of the unloading part 9 is supported at the tip thereof.

[0018] The load lifting part 9 maintains a vertical posture regardless of the elevation angle of the boom 7 (the rotation angle around the elevation axis perpendicular to the paper surface in Fig. 1) by a parallel link mechanism constituted among the slewing frame 5, the boom 7, and the parallel link 8. Further, a counterweight 13 is provided at the rear end of the slewing frame 5 on the side opposite to the tip of the boom 7. The counterweight 13 is connected to the tip of the boom 7 via a balancing lever 12. By the action of this counterweight 13, the load lifting part 9 is substantially in a no-load state, and a stable load balance is realized. Note that the main components of the slewing part such as the slewing frame 5, the boom 7, the balancing lever 12, and the counterweight 13 are also collectively referred to as the main body part hereinafter.

[0019] A cylinder 15 is provided to adjust the elevation angle of the boom 7. When the cylinder 15 is at the reference length, the elevation angle is 0 degree, that is, the boom 7 is parallel to the ground or horizontal (the left-right direction in Fig. 1). When the cylinder 15 is extended from the reference length, the tip of the boom 7 rises and a positive elevation angle is generated. When the cylinder 15 is contracted from the reference length, the tip of the boom 7 descends and a negative elevation angle is generated. The load lifting part 9 supported by the tip of the boom 7 rises while maintaining a vertical posture as the elevation angle of the boom 7 increases, and descends while maintaining a vertical posture as the elevation angle of the boom 7 decreases. Thus, the load lifting part 9 as a cargo handling device or a load lifting device moves integrally up and down according to the elevation of the boom 7.

[0020] The main operation room 16 for operating the CSU1 is provided in the CSU1 or the main body of the slewing unit. In the example of FIG. 1, the main operation room 16 is provided on the side of the loading and unloading section 9 of the slewing frame 5. The operator in the main operation room 16 can safely operate the CSU1 while visually recognizing the loading and unloading section 9. Note that the operator in the main operation room 16 may also operate the CSU1 while visually recognizing the image or video in the cargo hold 201 taken by the imaging device described later on the monitor. According to the operation of the CSU1 through the main operation room 16, parameters regarding the position, attitude, movement, etc. of the CSU1, such as the position of the traveling unit 2, the slewing angle of the slewing frame 5, and the elevation angle of the boom 7, are controlled. Also, the unloading operation of the bulk cargo M by the loading and unloading section 9 can be operated through the main operation room 16.

[0021] The loading and unloading section 9 includes a scraping section 11 as a cargo handling section for scraping the bulk cargo M in the cargo hold 201, and a bucket elevator as a conveying section for conveying the bulk cargo M scraped by the scraping section 11 upward and out of the cargo hold 201. The scraping section 11 is provided at the lower part of the loading and unloading section 9. The bulk cargo M in the cargo hold 201 is continuously excavated and scraped by a number of buckets 27 (see FIG. 3) movably provided along the outer periphery of the scraping section 11 in a single direction (W in FIG. 1). The bulk cargo M scraped by the scraping section 11 is conveyed upward together with the buckets 27 by the bucket elevator.

[0022] FIG. 3 shows the detailed configuration of the loading and unloading section 9. The bucket elevator includes a cylindrical elevator main body 14 extending in the vertical direction, and a chain bucket 29 that circulates along the outer peripheries of the elevator main body 14 and the scraping section 11. The chain bucket 29 includes a pair of roller chains 25 each formed of an endless chain, and a plurality of buckets 27 supported on both sides by the pair of roller chains 25. Specifically, the pair of roller chains 25 are arranged in parallel in a direction perpendicular to the plane of the paper in FIG. 3(B), and each bucket 27 is attached so as to be suspended between the pair of roller chains 25.

[0023] The bucket elevator includes a drive roller 31a that rotationally drives a spanned roller chain 25, driven rollers 31b and 31c, and a turning roller 33. The drive roller 31a is provided at the uppermost part 9a of the bucket elevator and is rotationally driven by a motor or the like (not shown) to cause the chain bucket 29 to perform a circular motion. The driven roller 31b is provided in front of the scraping portion 11 (to the left in FIG. 3(B)), and the driven roller 31c is provided behind the scraping portion 11 (to the right in FIG. 3(B)), and each guides the chain bucket 29 that performs a circular motion. The turning roller 33 is a driven roller provided below the drive roller 31a, guides the chain bucket 29 that performs a circular motion, and changes its motion direction. An extendable cylinder 35 is provided between the driven roller 31b and the driven roller 31c. When this cylinder 35 expands and contracts, the axial distance between the two driven rollers 31b and 31c changes, and the orbit of the circular motion of the chain bucket 29 changes. The expansion and contraction control of the cylinder 35 may be performed according to an operation through the main operation room 16, or may be automatically performed by a computer incorporated in the CSU1 according to a program. In addition, corresponding to the provision of two roller chains 25, two drive rollers 31a, two driven rollers 31b and 31c, and two turning rollers 33 are also provided and arranged in parallel in a direction perpendicular to the plane of the paper in FIG. 3(B).

[0024] By the rotational drive through the drive roller 31a, the chain bucket 29 performs a circular motion along the outer peripheries of the elevator body 14 and the scraping portion 11. For example, the chain bucket 29 performs a circular motion counterclockwise along the arrow W shown in FIG. 3(B). At this time, the chain bucket 29 reciprocates between the scraping portion 11 provided at the lowermost part of the bucket elevator and the drive roller 31a provided at the uppermost part 9a of the bucket elevator.

[0025] Each bucket 27 of the chain bucket 29 rises along the elevator main body 14 while maintaining a posture with its opening facing upward. When each bucket 27 passes through the drive roller 31a at the uppermost part 9a of the bucket elevator, as the movement direction changes from upward to downward, the opening of each bucket 27 also turns from upward to downward. Below the opening of each bucket 27 that has turned downward in this way, a discharge chute (not shown) is provided, and the bulk cargo M scraped up by each bucket 27 is discharged there. The discharge chute discharges the bulk cargo M onto a rotary feeder 37 (Fig. 1) provided on the outer periphery of the upper part of the discharging section 9.

[0026] The rotary feeder 37 rotates around a rotation axis in the extending direction of the elevator main body 14, that is, in the vertical direction, and transfers the bulk cargo M discharged from the discharge chute to the boom conveyor 39 of the boom 7. The boom conveyor 39 conveys the bulk cargo M along the boom 7 to the vicinity of the turning axis of the turning frame 5, and supplies it to a hopper (not shown) provided there. Inside the traveling section 2 below the discharge port of this hopper, an in-ship conveyor 43 for receiving the bulk cargo M is provided. The in-ship conveyor 43 transfers the bulk cargo M to the aforementioned belt conveyor 45 provided at the quay 102 as land.

[0027] Subsequently, the basic discharging operation of the CSU1 having the above configuration will be described. In this discharging operation, the discharging section 9 and / or the CSU1 functions as a cargo handling device or a discharging device for carrying out the bulk cargo M (ship's cargo) in the cargo hold 201 of the ship 200 to the outside of the cargo hold 201.

[0028] The operator of the CSU1 operates the CSU1 within the main operation room 16. First, the traveling unit 2 is made to travel on the rail 3 and moved to a position close to the hatch 21 of the cargo hold 201 to be unloaded. Subsequently, the swivel frame 5 is swiveled about a vertical swivel axis provided at a position overlapping the traveling unit 2 in the top view in FIG. 1, and the unloading unit 9 provided at the tip of the boom 7 is moved above the hatch 21 of the cargo hold 201 to be unloaded. Here, so that the unloading unit 9 does not collide with the quay 102 or the ship 200, it is preferable that the boom 7 is raised and lowered in the positive direction (clockwise direction in FIG. 1), and the traveling operation and the swivel operation are performed in a state where the unloading unit 9 has risen sufficiently. Subsequently, the boom 7 is raised and lowered in the negative direction (counterclockwise direction in FIG. 1), and the scraping unit 11 provided at the tip of the unloading unit 9 is inserted from the hatch 21 into the cargo hold 201. Note that the movement of the traveling unit 2, the swiveling of the swivel frame 5, and the raising and lowering of the boom 7 may be performed simultaneously if there are no safety problems.

[0029] After the scraping unit 11 is inserted into the cargo hold 201, the circumferential movement along the arrow W of the roller chain 25 starts. When the plurality of buckets 27 attached to the roller chain 25 perform a circumferential movement integrally with the roller chain 25, they excavate and scrape the bulk cargo M stored in the cargo hold 201. The bulk cargo M scraped by each bucket 27 is conveyed upward along the elevator main body 14 with the circumferential movement of the roller chain 25.

[0030] In order to efficiently scrape the bulk cargo M at various locations in the ship's hold 201, the scraping unit 11 may appropriately change its three-dimensional position within the ship's hold 201. For example, when the surface position of the bulk cargo M becomes lower as the unloading operation progresses, the boom 7 is lifted in the negative direction and the scraping unit 11 is lowered. Also, in order to scrape the bulk cargo M near the wall of the ship's hold 201, the position of the scraping unit 11 in the horizontal plane may be changed to approach the wall through the operation of the traveling unit 2 and / or the slewing frame 5. The scraping unit 11 may change not only its three-dimensional position but also its posture and shape. For example, the scraping unit 11 is rotatable around a rotation axis in the extending direction of the elevator main body 14, that is, in the vertical direction, and its direction can be arbitrarily changed. Also, as shown by the dashed-dotted line in FIG. 3(B), the scraping unit 11 can take an inclined shape or a horizontally long shape that contracts in the vertical direction and extends in the horizontal direction. Thereby, even in the ship's hold 201 where the horizontal distance from the hatch 21 to the wall is large, the scraping unit 11 can be brought closer to the wall to efficiently scrape the bulk cargo M.

[0031] The changes in the position, posture, movement, shape, etc. of the scraping unit 11 or the unloading unit 9 in the ship's hold 201 regarding the unloading operation of the CSU1 as described above may be autonomously performed by the CSU1 using a photographing device, a distance measuring sensor, etc. to be described later (that is, the unloading unit 9 and / or the CSU1 may be automatically operated), or may be manually performed by the operator in the main operation room 16 while communicating with the worker in the ship's hold 201.

[0032] The bucket 27 that has scraped the bulk cargo M in the ship's hold 201 as described above rises along the elevator main body 14 and turns from upward to downward when passing through the drive roller 31a at its uppermost part 9a. The bulk cargo M that has fallen due to the turning of the bucket 27 enters the discharge chute and is discharged onto the rotary feeder 37. Thereafter, the bulk cargo M is transferred to a belt conveyor 45 provided at the quay 102 as land via the boom conveyor 39 and the in-ship conveyor 43. By repeatedly performing the above-described unloading operation by a plurality of buckets 27, the bulk cargo M in the ship's hold 201 is continuously unloaded onto land.

[0033] Next, a waterproof sheet attached to the unloading unit 9 as a cargo handling device or a cargo lifting device will be described. FIG. 4 schematically shows the unloading unit 9 that performs cargo handling work or cargo lifting work with the waterproof sheet 6 attached thereto, in a side view similar to that of FIG. 3(B). FIG. 5 schematically shows the unloading unit 9 of FIG. 4 in a front view similar to that of FIG. 3(A).

[0034] The unloading unit 9 includes the aforementioned scraping unit 11 as a cargo handling unit or an unloading unit that unloads or lifts the bulk cargo M such as wooden pellets as ship cargo in the ship's hold 201, the aforementioned bucket elevator 92 as a conveying unit that conveys or unloads the bulk cargo M between the scraping unit 11 and outside the ship's hold 201, and an upper support unit 93 that supports the scraping unit 11 and the bucket elevator 92 above. As shown in FIG. 4, the bucket elevator 92 is connected below the upper support unit 93, and the aforementioned boom 7, parallel link 8, balancing lever 12, etc. are connected to the side (right side in FIG. 4) of the upper support unit 93.

[0035] As shown in FIG. 5, when performing cargo handling or unloading by the unloading unit 9, the hatch cover 211 that can open and close the upper part of the ship's hold 201 is opened, and a hatch 21 is formed as an upper opening. For this reason, the scraping unit 11 that constitutes the lower part of the unloading unit 9 can be inserted into the ship's hold 201 from above through the hatch 21. As described above, the scraping unit 11 scrapes the bulk cargo M stored in the ship's hold 201, and the bucket elevator 92 conveys or unloads the bulk cargo M upward together with the bucket 27. In FIG. 4, since the pair of hatch covers 211 are in front of and behind the paper surface or the unloading unit 9, they are schematically shown by dotted lines.

[0036] The bucket elevator 92 includes a substantially cylindrical fixed portion 921 that is non-rotatably fixed to the lower part of the upper support portion 93, and a rotating portion 922 that is rotatably provided with respect to the fixed portion 921 around the rotation axis in the extending direction of the bucket elevator 92, that is, the vertical direction. The rotating portion 922 includes the aforementioned chain bucket 29 or the like, and is the main part of the bucket elevator 92 responsible for transporting or unloading the bulk load M. As shown in FIG. 3(B), the rotating portion 922 passes vertically through the inside of the substantially cylindrical fixed portion 921 (described as the elevator main body 14 in FIG. 3(B)), and its uppermost part 9a is located within the upper support portion 93. Further, the rotating portion 922 extends downward from the lower end of the fixed portion 921 and is connected to the scraping portion 11. For this reason, the scraping portion 11 can rotate integrally with the rotating portion 922 with respect to the fixed portion 921 and / or the upper support portion 93. Note that only the lower structure of the rotating portion 922 connected to the scraping portion 11 may be rotatably provided. Also, at least a part of the rotating portion 922 may rotate inside the substantially cylindrical fixed portion 921.

[0037] The waterproof sheet 6 is a waterproof sheet that prevents the bulk load M such as wood pellets in the ship's hold 201 from getting wet with water such as rainwater or seawater. When unloading the load by the unloading portion 9 shown in FIGS. 4 and 5, the waterproof sheet 6 covers the scraping portion 11, the bucket elevator 92, and the hatch 21 of the ship's hold 201 from above to prevent rainwater, seawater, etc. from entering the ship's hold 201. Note that the waterproof sheet 6 also functions as a dust-proof sheet that prevents dust from the bulk load M during unloading operations or the like from scattering outside the ship's hold 201. The material and thickness of the waterproof sheet 6 are arbitrary as long as practical waterproofness, durability, flexibility, etc. in unloading by the unloading portion 9 during rainy days can be achieved. For example, the material of the waterproof sheet 6 may be polyethylene, and the thickness of the waterproof sheet 6 may be between 0.1 mm and 3.0 mm.

[0038] As will be described later, the lower part 61 of the waterproof sheet 6 is locked to the sheet lower mounting position 66 at the peripheral edge of the hatch 21, and the upper part 62 of the waterproof sheet 6 is attached to the sheet upper mounting position 64 at the upper support part 93. Even when the unloading part 9 or the boom 7 is raised to the highest position, or when the scraping part 11 or the unloading part 9 is closest to each wall of the ship's hold 201, the size of the waterproof sheet 6 is preferably large enough so that there is room for the waterproof sheet 6 to slacken in order to prevent the generation of excessive tension. The specific size and shape of the waterproof sheet 6 can be freely determined according to the structures and movable ranges of the boom 7, the unloading part 9, the scraping part 11, etc., and the sizes and shapes of the ship's hold 201, the hatch 21, the hatch cover 211, etc. For example, it may be a substantially rectangular shape with each side being 10 m or more, a substantially circular shape with a diameter of 10 m or more, or an elliptical shape with a major axis of 10 m or more. The weight of the waterproof sheet 6 with such a large size exceeds, for example, 30 kg per 10 m 3 by far.

[0039] FIG. 6 is a perspective view showing a schematic configuration example of the waterproof sheet 6. As shown in this figure, the waterproof sheet 6 may be constituted by a combination of a lower substantially cylindrical portion 6A and an upper substantially frustum - shaped portion 6B. The diameter D of the substantially cylindrical portion 6A is designed to be large enough to surround the hatch 21. The diameter d of the top of the substantially frustum - shaped portion 6B constituting the upper part 62 of the waterproof sheet 6 is about the same as the diameter of the waterproof sheet guide portion 65 described later. Further, an attachment portion to which a wire 63 described later is attached is provided on the upper part 62 of the waterproof sheet 6. The attachment portion is, for example, a fitting or an attachment hole for attaching the wire 63.

[0040] The lower part 61 of the waterproof sheet 6 is locked to the sheet lower mounting position 66 at the peripheral edge of the hatch 21 during handling or unloading by the scraping part 11 as a handling part. As shown in FIG. 5, the sheet lower mounting position 66 is a position outside the hatch cover 211 that forms the peripheral edge of the hatch 21. Although not shown, a plurality (for example, 12) of sheet lower mounting positions 66 are arranged so as to surround, for example, a rectangular hatch 21 at substantially equal intervals in a top view. As will be described later, mounting ropes as locking members substantially equal in number to the sheet lower mounting positions 66 may be attached to the lower part 61 of the waterproof sheet 6. Each mounting rope is fastened and fixed to a locked member (not shown) provided at each sheet lower mounting position 66. Note that a magnet may be provided as a locking member on the lower part 61 of the waterproof sheet 6 and fixed to the peripheral edge of the hatch 21 by its magnetic force. Further, a weight such as a chain may be provided as a locking member or an installation member on the lower part 61 of the waterproof sheet 6, and the lower part 61 may be placed on the peripheral edge of the hatch 21 by its own weight.

[0041] As shown in FIG. 5, the waterproof sheet 6 attached to the sheet lower mounting position 66 is placed and supported on a support part 67 which is an upper outer corner of the hatch cover 211 slightly inside and above the sheet lower mounting position 66. As schematically shown by the dotted line in FIG. 4, the corner parts in front (left in FIG. 4) and rear (right in FIG. 4) of the hatch cover 211 also support the waterproof sheet 6 from below as the support part 67.

[0042] The upper portion 62 of the waterproof sheet 6 is attached to the sheet upper attachment position 64 on the upper support portion 93. Specifically, the upper portion 62 of the waterproof sheet 6 is attached to the sheet upper attachment position 64 via a wire 63 or a chain as a long member. As will be described later, the wire 63 is connected to a winch provided at the sheet upper attachment position 64. When the wire 63 is wound up by the winch, the waterproof sheet 6 rises, and when the wire 63 is unwound by the winch, the waterproof sheet 6 descends. Here, when loading is performed by the loading portion 9 shown in FIGS. 4 and 5, as a result of the wire 63 being wound up by the winch, the upper portion 62 of the waterproof sheet 6 is received within a waterproof sheet guide portion 65 described next. Note that the long member, the winch provided at the sheet upper attachment position 64, and the waterproof sheet guide portion 65 constitute an attachment mechanism for attaching the upper portion 62 of the waterproof sheet 6 to the cargo handling device.

[0043] The waterproof sheet guide portion 65 guides the waterproof sheet 6 between the sheet upper attachment position 64 on the upper support portion 93 and the sheet lower attachment position 66 on the peripheral edge portion of the hatch 21 or the support portion 67 on the hatch cover 211. The waterproof sheet guide portion 65 may be fixed to the lower end portion of the upper support portion 93, or may be fixed to the outer peripheral surface of the fixing portion 921 of the bucket elevator 92. Since a passage for workers and the like to pass through is provided in the upper support portion 93, the waterproof sheet guide portion 65 is preferably provided as low as possible (for example, the bottom surface) when viewed from the upper support portion 93 so that the waterproof sheet guide portion 65 itself and the waterproof sheet 6 do not obstruct visibility from the passage. Further, the waterproof sheet guide portion 65 is preferably provided as high as possible when viewed from the bucket elevator 92 so as not to obstruct the operation of the bucket elevator 92, particularly the rotation operation of the rotating portion 922. Thus, the waterproof sheet guide portion 65 is preferably provided at the boundary portion between the upper support portion 93 and the bucket elevator 92 (particularly, the fixing portion 921).

[0044] The waterproof sheet guide 65 may be attached to the unloading section 9 only during rainy days when the waterproof sheet 6 is used, but it is preferably permanently installed in the unloading section 9 regardless of the weather. On sunny days when the waterproof sheet 6 is not used, the waterproof sheet guide 65 is not substantially used either, but it does not interfere with the intended operation of the unloading section 9.

[0045] The waterproof sheet guide 65 guides the waterproof sheet 6 at a position outside the outer periphery of the bucket elevator 92 as a conveying section. Specifically, the waterproof sheet guide 65 is provided to surround the outer periphery of the substantially cylindrical fixing portion 921 at the upper part of the bucket elevator 92, and guides the waterproof sheet 6 at a position away from the outer periphery so that the waterproof sheet 6 does not contact it. Since the waterproof sheet 6 that exits from the lower end of the waterproof sheet guide 65 naturally spreads toward the lower outer support portion 67, it does not contact not only the fixing portion 921 of the bucket elevator 92 but also the lower rotating portion 922 and the scraping portion 11 unless under abnormal strong winds that would stop the unloading operation itself. For this reason, even when the waterproof sheet 6 is attached, the unloading section 9 and the scraping section 11 can perform the cargo handling operation or the unloading operation in the same manner as on sunny days or the like.

[0046] FIG. 7 shows the waterproof sheet guide 65. FIG. 7(A) is a side view of the waterproof sheet guide 65, and FIG. 7(B) is a cross-sectional view taken along line A-A in FIG. 7(A). The waterproof sheet guide 65 includes an inner cylindrical member 651, an outer cylindrical member 652, and an umbrella portion 653. Both the inner cylindrical member 651 and the outer cylindrical member 652 are substantially cylindrical members. As shown in FIG. 7(B), the inner cylindrical member 651 with a relatively small diameter is concentrically arranged inside the outer cylindrical member 652 with a relatively large diameter.

[0047] As shown in FIG. 8, which is a cross-sectional view taken along line B-B in FIG. 7(B), the waterproof sheet 6 is guided in a guide space 654 formed between an inner cylindrical member 651 and an outer cylindrical member 652. As described above, the upper portion 62 of the waterproof sheet 6 is attached to the lower end of a wire 63 or a chain as a long member. In the state of FIG. 8 corresponding to FIGS. 4 and 5, the connection point between the upper portion 62 of the waterproof sheet 6 and the wire 63 is located within the guide space 654. Thus, when unloading is performed by the unloading portion 9 shown in FIGS. 4, 5, and 8, the upper portion 62 of the waterproof sheet 6 is sandwiched between the inner cylindrical member 651 and the outer cylindrical member 652 and is gently positioned with respect to the waterproof sheet guide portion 65. Even under strong winds, the upper portion 62 of the waterproof sheet 6 is supported from both sides by the inner cylindrical member 651 and the outer cylindrical member 652. For this reason, the upper shape of the waterproof sheet 6 is maintained in the intended shape shown in FIGS. 4 and 5, and deformation inward is also suppressed, preventing contact with the fixing portion 921 of the bucket elevator 92.

[0048] As schematically shown in FIG. 7(A), the inner cylindrical member 651 and the outer cylindrical member 652 are formed such that corresponding circumferential portions thereof are reticulated, and preferably, their entireties are reticulated. The inner cylindrical member 651 and / or the outer cylindrical member 652 may be formed in a plate shape, but forming them in a reticulated shape can reduce the weight of the waterproof sheet guide portion 65 and ensure visibility from the outside. For example, when the waterproof sheet 6 is not being pulled up by the aforementioned winch, the state of the wire 63 in the guide space 654 and the state of the fixing portion 921 of the bucket elevator 92 inside the inner cylindrical member 651 can be visually recognized from the outside. Also, when the waterproof sheet 6 is pulled up as shown in FIG. 8, it can be visually recognized from the outside whether the upper portion 62 of the waterproof sheet 6 is at the intended position or height in the guide space 654.

[0049] As shown in FIGS. 7(A) and 8, the umbrella portion 653 covers at least a part inside the inner cylindrical member 651 above the inner cylindrical member 651 and the outer cylindrical member 652. As also shown in FIG. 9, which is a schematic top view of FIG. 7(A), the inclined upper surface of the umbrella portion 653 is composed of a shielding portion 655 and a transmissive portion 656. The shielding portion 655 is composed of a cloth or the like having waterproofness and light shielding property in order to shield water such as rainwater. The transmissive portion 656 may be a space where nothing is provided, or may be composed of a transparent film or the like having waterproofness and translucency.

[0050] In order to prevent water such as rainwater from entering the inside of the inner cylindrical member 651, it is preferable that the entire upper surface of the umbrella portion 653 is composed of the shielding portion 655. However, on the upper support portion 93 above the umbrella portion 653, there may be provided an illumination device (not shown) for illuminating the inside of the ship's hold 201, a photographing device (not shown) for photographing the inside of the ship's hold 201, and an optical measuring device such as a distance measuring sensor (not shown) for optically measuring the inside of the ship's hold 201. The light-shielding shielding portion 655 hinders the intended operations of these illumination devices, photographing devices, and optical measuring devices.

[0051] Therefore, in the present embodiment, as schematically shown in FIG. 9, the portion through which the light used by the illumination device, the photographing device, and the optical measuring device passes on the upper surface of the umbrella portion 653 is composed of the transmissive portion 656. These transmissive portions 656 function as an illumination light transmissive portion for transmitting the illumination light of the illumination device toward the inside of the ship's hold 201, a photographing window portion for ensuring visibility for photographing the inside of the ship's hold 201 by the photographing device, and a measurement window portion for enabling optical measurement of the inside of the ship's hold 201 by the optical measuring device. When the transmissive portion 656 is a space where nothing is provided, water such as rainwater may enter the inside of the inner cylindrical member 651 from there. However, as shown in FIGS. 4 and 5, above the umbrella portion 653, there is an upper support portion 93 that also functions as an additional umbrella portion covering it, so that the intrusion of water through the transmissive portion 656 is suppressed to a minimum.

[0052] Subsequently, a method of attaching the waterproof sheet 6 as described above to the unloading portion 9 as a cargo handling device or a unloading device will be described.

[0053] FIG. 10 schematically shows an initial state in which the unloading section 9 is positioned above the quay 102. FIG. 10(A) is a side view, and FIG. 10(B) is a top view of the storage basket 68. In this initial state, a storage basket 68 in which a waterproof sheet 6 is stored is arranged on the quay 102 below the unloading section 9. The lower ends of a plurality (for example, four) of wires 63 unwound by a winch provided at the sheet upper mounting position 64 described above are tied to and fixed to the upper portion 62 of the waterproof sheet 6 by an operator or the like on the quay 102. In this way, the upper portion 62 of the waterproof sheet 6 is attached to the sheet upper mounting position 64 in the upper support portion 93 by the wire 63 as a long member.

[0054] In the subsequent FIG. 11, the wire 63 is wound up by a winch provided at the sheet upper mounting position 64, and the waterproof sheet 6 attached to the lower end thereof is pulled up to the same height as in FIG. 4. As a result, substantially the entire outer periphery of the scraping portion 11 and the bucket elevator 92 in the unloading section 9 is covered by the waterproof sheet 6. In order to prevent the wound-up waterproof sheet 6 from coming into contact with the scraping portion 11 and being damaged, one or a plurality of, for example, rod-shaped spacers (not shown) protruding from the outer periphery of the scraping portion 11 may be provided. A plurality (for example, twelve) of mounting ropes 69 that are tied to a plurality of sheet lower mounting positions 66 (FIGS. 4 and 5) at the peripheral edge of the hatch 21 are attached to the lower portion 61 of the waterproof sheet 6 by an operator or the like on the quay 102. The unloading section 9 with the waterproof sheet 6 attached in this way is moved from above the quay 102 to above the hatch 21 by the traveling section 2, the slewing frame 5, the boom 7, and the like.

[0055] In the following Figure 12, the attachment member attached to the lower part 61 of the waterproof sheet 6 is locked to a plurality of sheet lower attachment positions 66 on the peripheral edge of the hatch 21. In the illustrated example, the locking member is constituted by an attachment rope 69. In this case, the lower part 61 of the waterproof sheet 6 is attached to the sheet lower attachment position 66 on the peripheral edge of the hatch 21 by the attachment rope 69 as the locking member. In Figure 12, the attachment rope 69 extends between the lower part 61 of the waterproof sheet 6 and the sheet lower attachment position 66. Actually, however, the attachment rope 69 is tightened in a state where it is pulled as close as possible to the sheet lower attachment position 66 side so that the lower part 61 of the waterproof sheet 6 and the sheet lower attachment position 66 substantially coincide. Note that the locking member is not limited to the attachment rope 69, and may be the aforementioned magnet or weight.

[0056] Subsequently, when the unloading section 9 descends by the boom 7, it reaches the states shown in FIGS. 4 and 5, and the cargo handling operation or the unloading operation is started. FIGS. 13 and 14 show the state where the surface position of the bulk cargo M has become lower as the unloading operation progresses. In order to scrape up the bulk cargo M at a low position, the boom 7 is undulated in the negative direction and the scraping section 11 is descending. At this time, the waterproof sheet 6 sags between the upper part 62 and the support section 67 to store the rainwater R. If the amount of rainwater R accumulated on the waterproof sheet 6 is relatively small, the waterproof sheet 6 having a certain degree of durability can withstand until the unloading operation is completed. When the boom 7 is undulated in the positive direction to take the unloading section 9 out of the ship's hold 201 after the unloading operation is completed, the waterproof sheet 6 that moves up and down integrally with the unloading section 9 (the scraping section 11 and / or the bucket elevator 92) rises and the slack is eliminated, so that the rainwater R is discharged outside the hatch 21. On the other hand, when the amount of rainwater R accumulated on the waterproof sheet 6 increases, by undulating the boom 7 in the positive direction during the unloading operation, for example, it can be returned to the states shown in FIGS. 4 and 5 to discharge the accumulated rainwater R outside the hatch 21.

[0057] As described above, it is preferable that the waterproof sheet 6 is deployed so as to cover the scraping portion 11, the bucket elevator 92, and the hatch 21 of the ship's hold 201 during rainy days. During sunny days, the waterproof sheet 6 may not be attached to the unloading section 9 and may remain stored in the storage basket 68 as shown in FIG. 10.

[0058] The above disclosure has been described based on the embodiments. Various modifications are possible for the combination of each component and each process in the exemplary embodiments, and it is obvious to those skilled in the art that such modifications are included in the scope of the present disclosure.

[0059] The present disclosure is not limited to the bucket elevator type continuous unloader described in the embodiments, and can also be applied to a spiral type unloader or an unloader equipped with an air conveying mechanism.

[0060] The configuration and shape of the waterproof sheet 6 are also not limited to those exemplified in the embodiments. FIGS. 15 to 20 show modified examples of the waterproof sheet 6.

[0061] FIG. 15 corresponds to FIG. 10(A) in the embodiment and schematically shows an initial state in which the unloading section 9 is located above the quay 102. The waterproof sheet 6 in this modified example is composed of an upper bellows portion 6B that is attached to the upper support portion 93 and / or the fixing portion 921 of the bucket elevator 92 and is vertically stretchable, and a lower sheet portion 6A. In FIG. 15, the bellows portion 6B is in an extended state and covers substantially the entire circumference or substantially the entire length of the bucket elevator 92. The sheet portion 6A is stored in the storage basket 68 and is attached to the lower part of the bellows portion 6B by an attachment rope 6C.

[0062] In the subsequent FIG. 16 corresponding to FIG. 11 in the embodiment, the unloading section 9 to which the waterproof sheet 6 is attached is moved from above the quay 102 to above the hatch 21 by the traveling section 2, the swivel frame 5, the boom 7, etc. At this time, as shown in the figure, the bellows portion 6B may remain in the extended state or in the contracted state.

[0063] In the subsequent FIG. 17 corresponding to FIG. 12 in the embodiment, the attachment rope 69 attached to the lower part 61 of the sheet part 6A is surrounded and fixed to a plurality of sheet lower attachment positions 66 at the peripheral part of the hatch 21. To facilitate this operation, as shown in the drawing, the bellows part 6B may be in a contracted state.

[0064] In the subsequent FIG. 18, the fixing of the sheet part 6A and the sheet lower attachment position 66 by the attachment rope 69 (which is not visible in this figure) is completed. At this time, as shown in the drawing, the bellows part 6B may be in an extended state.

[0065] In the subsequent FIG. 19 corresponding to FIG. 4 in the embodiment, the unloading part 9 is lowered by the boom 7, and the cargo handling operation or the unloading operation is started. As shown in the drawing, the bellows part 6B may always be kept in a contracted state during the unloading operation, or may expand and contract appropriately according to the progress of the unloading operation. FIG. 20 corresponding to FIG. 13 in the embodiment shows a state where the surface position of the bulk cargo M has become lower as the unloading operation progresses. At this time, the sheet part 6A of the waterproof sheet 6 sags between the contracted bellows part 6B and the support part 67 to collect the rainwater R. When the boom 7 is raised in the positive direction to take the unloading part 9 out of the ship's hold 201 after the unloading operation is completed, the bellows part 6B that moves up and down integrally with the unloading part 9 (the scraping part 11 and / or the bucket elevator 92) rises and the slack is eliminated, so that the rainwater R is discharged outside the hatch 21. On the other hand, when the amount of rainwater R accumulated on the sheet part 6A of the waterproof sheet 6 increases, by raising the boom 7 in the positive direction during the unloading operation, for example, it can be returned to the state as shown in FIG. 19 to discharge the accumulated rainwater R outside the hatch 21.

[0066] Note that the configurations, operations, and functions of each device and each method described in the embodiment can be realized by hardware resources or software resources, or by the cooperation of hardware resources and software resources. As hardware resources, for example, a processor, a ROM, a RAM, and various integrated circuits can be used. As software resources, for example, programs such as an operating system and an application can be used.

[0067] In the embodiment, a CSU is exemplified as the cargo handling device. However, the cargo handling device according to the present disclosure may be a cargo unloading machine such as a vertical screw conveyor type unloader, for example. Further, the cargo handling device according to the present disclosure may also be a ship loader for loading cargo onto a ship.

Description of Reference Numerals

[0068] 1 Cargo unloading machine (CSU), 6 Waterproof sheet, 9 Cargo unloading section, 11 Scraping section, 21 Hatch, 61 Lower part, 62 Upper part, 63 Wire, 64 Sheet upper mounting position, 65 Waterproof sheet guide part, 66 Sheet lower mounting position, 67 Support part, 69 Mounting rope, 92 Bucket elevator, 93 Upper support part, 201 Ship's hold, 211 Hatch cover, 651 Inner cylindrical member, 652 Outer cylindrical member, 653 Umbrella part, 654 Guide space, 655 Shielding part, 656 Transmissive part, 921 Fixed part, 922 Rotating part.

Claims

1. A conveying unit for conveying cargo between the inside and outside of the cargo hold, A waterproof sheet covering the hatch of the conveying unit and the cargo hold, A handling device comprising the same.

2. Comprising an upper support part for supporting the conveying part above, The upper part of the waterproof sheet is attached to the sheet upper attachment position on the upper support part, The handling device according to Claim 1.

3. The conveying part is rotatable with respect to the upper support part, and the handling device according to Claim 2.

4. The upper part of the waterproof sheet is attached to the sheet upper attachment position via a long member, The long member is pulled up together with the waterproof sheet during handling by the handling device, The handling device according to Claim 3.

5. The lower part of the waterproof sheet is attached by a locking member to the sheet lower attachment position at the peripheral edge of the hatch during handling by the handling device, and the handling device according to Claim 4.

6. Comprising a waterproof sheet guide part for guiding the waterproof sheet between the sheet upper attachment position and the sheet lower attachment position, and the handling device according to Claim 5.

7. The waterproof sheet guide part guides the waterproof sheet at a position outside the outer periphery of the conveying part, and the handling device according to Claim 6.

8. The waterproof sheet guide part comprises an inner cylindrical member and an outer cylindrical member provided outside the inner cylindrical member, The waterproof sheet is guided between the inner cylindrical member and the outer cylindrical member, The handling device according to Claim 7.

9. The inner cylindrical member and the outer cylindrical member are formed in a net shape at circumferential parts corresponding to each other, and the handling device according to Claim 8.

10. The inner cylindrical member and the outer cylindrical member are each formed entirely in a net shape, and the handling device according to Claim 9.

11. The waterproof sheet guide part comprises an umbrella part covering at least a part inside the inner cylindrical member above the inner cylindrical member and the outer cylindrical member, and the handling device according to Claim 8.

12. An illuminating device for illuminating the inside of the cargo hold is provided on the upper support part, The umbrella part comprises an illumination light transmission part for transmitting the illumination light of the illuminating device toward the inside of the cargo hold, The handling device according to Claim 11.

13. A photographing device for photographing the inside of the cargo hold is provided on the upper support part, The umbrella part comprises a photographing window part for ensuring visibility for photographing the inside of the cargo hold by the photographing device. The cargo handling device according to claim 11.

14. The cargo handling device according to any one of claims 1 to 13, wherein the cargo is wood pellets.

15. The cargo handling device according to any one of claims 1 to 13, wherein the waterproof sheet is deployed to cover the hatch of the conveying unit and the ship's hold during rainy days and is stored during sunny days.

16. The cargo handling device according to any one of claims 1 to 13, wherein the waterproof sheet moves up and down integrally with the conveying unit.

17. The cargo handling device according to claim 16, wherein water accumulated on the waterproof sheet is discharged outside the hatch in response to the rise of the waterproof sheet.

18. A conveying unit in a cargo handling device for conveying cargo between the inside and outside of a ship's hold, and a waterproof sheet covering the hatch of the ship's hold, the waterproof sheet having an attachment portion to which a long member for attaching the waterproof sheet to the cargo handling device is attached.

Images