Cargo handling apparatus

Abstract

To provide a cargo handling device capable of easily holding a connection part of a power supply cable on a device side.SOLUTION: In a cargo handling device 100, a power supply cable 20 is paid out along a jib 3, and has an outlet 21 at an end. Therefore, the outlet 21 of the power supply cable 20 is extended to the position of the hoisting accessory to be supplied with power, and the power supply cable 20 is rewound when not in use. Here, the article handling device 100 includes the holding portion 30 that holds the outlet 21 on the feeding path CL of the feeding cable 20. Therefore, when the feeding cable 20 is rewound along the feeding path CL, the article handling apparatus 100 can easily hold the outlet in the holding portion 30 during the rewinding operation.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cargo handling apparatus. [Background technology]

[0002] A cargo handling device is a device that performs cargo handling work at a cargo handling section. A double-link retractable crane as described in Patent Document 1, for example, is known as such a cargo handling device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-58969 Summary of the Invention [Problem to be solved by the invention]

[0004] Here, the cargo handling unit of the cargo handling device may use an electric hoisting tool. To supply power to the electric hoisting tool, a power supply cable is extended to the position of the hoisting part. The cargo handling device may use multiple types of such hoisting tools. In this case, multiple types of power supply cables must be prepared and unused power supply cables must be held on the device side. When a worker performs such work, the worker must access the holding location and perform the work. In other words, the worker must work at a height, which takes time. Therefore, there has been a need for a way to easily hold the connection part of the power supply cable on the device side.

[0005] An object of the present invention is to provide a cargo handling device that can easily hold the connection portion of a power supply cable on the device side. [Means for solving the problem]

[0006] A loading and unloading device according to one aspect of the present invention is a loading and unloading device having a loading and unloading section, and including a power supply cable that is unwound along the loading and unloading section and has a connection section at the end, and a holding section that holds the connection section on the unwound path of the power supply cable.

[0007] In this loading and unloading device, the power supply cable is unwound along the loading and unloading section and has a connection section at its end. Therefore, the connection section of the power supply cable is extended to the position of the hoisting fixture to which power is to be supplied, and the power supply cable is rewound when not in use. Here, the loading and unloading device has a holding section that holds the connection section on the unwound path of the power supply cable. Therefore, when the loading and unwinding device rewinds the power supply cable along the unwound path, the connection section can be easily held in the holding section during the rewinding operation. As described above, the connection section of the power supply cable can be easily held.

[0008] The loading and unloading device may further include a deflecting sheave provided at the tip of the loading and unloading unit for deflecting the power supply cable, and the holding unit may hold the connection part while the connection part is resting on the deflecting sheave. In this case, when the power supply cable is unwound and the connection part reaches the deflecting sheave, the holding unit can protect the connection part while it is still resting on the deflecting sheave. Furthermore, because the connection part is resting on the deflecting sheave, the weight of the connection part and the power supply cable allows the power supply cable to be easily pulled out of the deflecting sheave.

[0009] The holding portion may have a guide roller that guides the power supply cable. In this case, when the power supply cable is unwound, the connection portion can be smoothly guided into the holding portion by the guide roller.

[0010] A buffer section may be provided between the connecting section and the holding section. In this case, when the connecting section reaches the holding section, the buffer section comes into contact with the member of the holding section. Therefore, the buffer section can absorb the impact when the connecting section and the member of the holding section come into contact.

[0011] The holding portion may be formed in a box shape. In this case, the holding portion can hold the connection portion with a simple configuration. Furthermore, by enclosing the outlet 21 in the box-shaped holding portion 30, the outlet 21 can be effectively protected from wind and rain. Furthermore, by enclosing the outlet 21 in the box-shaped holding portion 30, the outlet 21 can be prevented from falling off the holding portion 30.

[0012] The deflecting sheave may have a width corresponding to the connecting portion, so that the connecting portion can be easily placed on the deflecting sheave, and the holding portion can hold the connecting portion in a stable state on the deflecting sheave.

[0013] The cargo handling device may have a plurality of power supply cables. In this case, when a plurality of types of hoisting tools are used in the hoisting section, power supply cables suited to the types can be connected to the hoisting tools.

[0014] The loading and unloading device may further include a cable drum provided on the hanging part of the loading and unloading unit and around which the power supply cable is wound. In this case, the power supply cable can be supported by being wound around the cable drum. Therefore, when a force acts on the power supply cable in the unwinding direction, the portion around which the cable drum is wound can withstand the load, thereby preventing the connection part from coming off the power supply target.

[0015] The cargo handling device may further include a cable holding pin that is inserted into the cable drum so as to hold down the power supply cables wound around the cable drum. In this case, the cable holding pin can prevent the bundle of power supply cables wound around the cable drum from coming apart. [Effects of the Invention]

[0016] According to the present invention, it is possible to provide a cargo handling device that can easily hold the connection portion of the power supply cable. [Brief explanation of the drawings]

[0017] [Figure 1]1 is a schematic diagram illustrating the overall configuration of a cargo handling apparatus according to an embodiment of the present invention. [Figure 2] 1 is a schematic diagram illustrating the overall configuration of a cargo handling apparatus according to an embodiment of the present invention. [Figure 3] FIG. 2 is a perspective view showing the vicinity of the sea-side end of the front link. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 10 is a schematic diagram for explaining a work procedure. [Figure 8] FIG. 10 is a schematic view showing a cargo handling apparatus according to a comparative example. [Figure 9] FIG. 10 is a schematic view showing a cargo handling apparatus according to a comparative example. [Figure 10] FIG. 10 is a schematic view showing a cargo handling apparatus according to a comparative example. [Figure 11] FIG. 10 is a schematic view showing a cargo handling apparatus according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of a cargo handling apparatus according to the present invention will be described with reference to the accompanying drawings. In the following description, the same or equivalent elements will be designated by the same reference numerals, and redundant description will be omitted.

[0019] First, the structure of a cargo handling apparatus according to an embodiment of the present invention will be described with reference to Figures 1 and 2. Figures 1 and 2 are schematic diagrams illustrating the overall configuration of a cargo handling apparatus according to this embodiment.

[0020] In this embodiment, a double-link level luffing crane (LLC) is used as the cargo handling apparatus 100. Note that the cargo handling apparatus 100 is not limited to a double-link level luffing crane, and a bridge crane, a jib crane, or the like may also be used.

[0021] The cargo handling apparatus 100 is a device that is arranged on a quay or the like to load and unload cargo onto and from a cargo ship. As shown in Fig. 1, the cargo handling apparatus 100 includes legs 1A, 1B, a swivel device 2, a jib 3 (cargo handling section), a hoisting section 4 (cargo handling section), a wire 6, a reeling device 7, and a retracting device 8. In the following description, the direction toward the sea where the cargo ship is located relative to the quay (the left side of the drawing) will be referred to as the "sea side," and the direction toward land (the right side of the drawing) will be referred to as the "land side."

[0022] Legs 1A, 1B are a frame body that is placed on the quay and supports the entire cargo handling apparatus 100. Leg 1A is provided on the land side, and leg 1B is provided on the sea side. Legs 1A, 1B extend in the vertical direction. Traveling devices 10A, 10B that run on rails 9A, 9B provided on the quay are provided at the lower ends of legs 1A, 1B. This allows the cargo handling apparatus 100 to run on the rails along the quay. A slewing device 2 is provided on the upper part of legs 1A, 1B. The slewing device 2 rotates relative to legs 1A, 1B to rotate jib 3. A support column 5 extending upward is provided on the slewing device 2.

[0023] The jib 3 is a member supported by the slewing device 2 provided on the upper part of the legs 1A, 1B. The jib 3 is positioned so as to extend from the slewing device 2 toward the sea side during cargo handling operations. Therefore, the side of the jib 3 closer to the slewing device 2 is sometimes referred to as the land side, and the side farther from the slewing device 2 is sometimes referred to as the sea side. The jib 3 has a front link 3B provided on the slewing device 2 and a jib link 3A that can be bent relative to the front link 3B. The jib link 3A is connected to the sea side tip of the front link 3B in a bendable manner. Note that the form of the jib 3 is not limited to one having a front link 3B and a jib link 3A, and it may be configured as a single jib 104 (which may also be referred to as a boom) as shown in FIG. 11.

[0024] The hoisting unit 4 is suspended by a wire 6 from the seaward end of the jib link 3A of the jib 3. The hoisting unit 4 is the part where cargo is loaded and unloaded. A hook is used as the hoisting device for the hoisting unit 4. The wire 6 is a member connected to the hoisting unit 4. The reeling device 7 is a mechanism that reels the wire 6 using a drum. The reeling device 7 reels in and unreels the wire 6, thereby moving the hoisting unit 4 up and down and opening and closing it. The hoisting device for the hoisting unit 4 is not limited to a hook, and any hoisting device appropriate for the load can be used. Examples of hoisting devices include a grab bucket, a lifting magnet, and a coil lifter. The retracting device 8 retracts the front link 3B of the jib 3 to adjust the distance between the center of the slewing device 2 and the hoisting unit 4. Various actuators such as a hydraulic cylinder or an electric cylinder can be used as the retracting device 8.

[0025] Here, the front link 3B has a main body 11, a weight 12, and a link 13. The main body 11 is the part that connects the slewing device 2 and the front link 3B. The weight 12 functions as a counterweight when retracting the sling part 4, jib link 3A, and front link 3B toward the land side. The weight 12 is connected to the upper end of the support 5 and the end of the link 13. The link 13 connects a midpoint of the main body 11 to the weight 12. The members of the front link 3B are rotatably connected at connection parts 14A, 14B, 14C, and 14D shown in the figure.

[0026] The jib 3 has steering sheaves 16A, 16B, and 16C. The steering sheaves 16A, 16B, and 16C are rotatable members for changing the direction of the wire 6. The steering sheave 16A is provided at the upper end of the support 5. The steering sheave 16B is provided at the sea side end of the front link 3B. The steering sheave 16C is provided at the sea side end of the jib link 3A. The wire 6 pulled out from the reel 7 is directed toward the jib link 3A by the steering sheave 16A. The wire 6 turned by the steering sheave 16A is directed toward the sea side end of the jib link 3A by the steering sheave 16B. The wire 6 turned by the steering sheave 16B is directed downward by the steering sheave 16C.

[0027] The cargo handling apparatus 100 has a power supply cable 20. The power supply cable 20 is a cable that supplies power to the hoisting unit 4. The power supply cable 20 is reeled out along the jib 3 and has an outlet 21 (connection portion) at its end. The cargo handling apparatus 100 has a cable reel 22 that reels out the power supply cable 20. The cable reel 22 is provided midway between the sea-side end and the land-side end of the jib link 3A. In other words, the cable reel 22 is provided on the jib link 3A at a position spaced away from the sea-side end (the diverting sheave 16C) of the jib link 3A toward the land side. The power supply cable 20 is reeled out from the slewing device 2, extends along the main body 11 of the front link 3B toward the jib link 3A, and is wound and stored on the cable reel 22. The power supply cable 20 also extends from the cable reel 22 toward the sea-side end of the jib link 3A. The cargo handling device 100 has a steering sheave 34 at the seaward tip of the jib 3 that steering the power supply cable 20. The power supply cable 20 is steered by the steering sheave 34 and extended toward the hoisting part 4. The cable reel 22 pays out the power supply cable 20 along the jib link 3A toward the steering sheave 34, and then pays out the power supply cable 20 downward from the steering sheave 34 toward the hoisting part 4.

[0028] The cargo handling device 100 includes a holding unit 30 and a connection mechanism 50. The holding unit 30 is a portion that holds the outlet 21 on the payout path CL of the power supply cable 20. In this embodiment, the connection mechanism 50 is a mechanism that is provided on the suspending unit 4 and maintains a state in which the outlet 21 of the power supply cable 20 is connected to the device of the suspending unit 4.

[0029] The holding unit 30 and its surrounding mechanism will be described with reference to Figures 3 and 4. Figure 3 is a perspective view showing the vicinity of the sea-side end of the jib link 3A. Figure 4 is a top view of the holding units 30A and 30B. In Figure 3, the direction in which the jib link 3A extends is defined as the longitudinal direction D1, and the horizontal direction perpendicular to the longitudinal direction is defined as the width direction D2. In Figure 3, the cargo handling apparatus 100 has multiple power feed cables 20, specifically, a pair of power feed cables 20A and 20B. As shown in Figure 3, the jib link 3A has a pair of frames 31, 31 extending in the longitudinal direction D1 and spaced apart from each other in the width direction D2. The pair of frames 31, 31 are connected to each other by a connecting frame 32 extending in the width direction D2. A shaft 33 supported between the pair of frames 31, 31 is provided at the sea-side end of the jib link 3A in the longitudinal direction D1. A pair of turning sheaves 16C, 16C for the wire 6 are rotatably provided on the shaft portion 33. A turning sheave 34A for the power supply cable 20A and a turning sheave 34B for the power supply cable 20B are rotatably provided between the pair of turning sheaves 16C, 16C on the shaft portion 33. As a result, the turning sheave 34A and the turning sheave 34B are arranged side by side in the width direction D2.

[0030] The diverting sheaves 34A and 34B have a width corresponding to the outlet 21. As shown in FIG. 4, the diverting sheaves 34A and 34B include a main body 34a and a pair of restricting portions 34b. The main body 34a is a disk-shaped member whose outer circumferential surface contacts the power supply cables 20A and 20B. The restricting portions 34b are disk-shaped members having a diameter larger than that of the main body 34a. The restricting portions 34b are arranged to sandwich the main body 34a from the outside in the width direction D2. The restricting portions 34b are members that prevent the power supply cables 20A and 20B, which are placed on the outer circumferential surface of the main body 34a, from slipping outward in the width direction D2. As shown in FIG. 4(b), the outlet 21 is placed on the outer circumferential surface of the main body 34a. Therefore, the diverting sheaves 34A and 34B have a width corresponding to the outlet 21. The dimension of the main body 34a in the width direction D2 (the dimension between the restricting portions 32b, 32b) is set to be larger than the dimension of the outlet 21 in the width direction and to a dimension that does not cause excessive rattle.

[0031] As shown in FIG. 3 , the outlet 21 at the tip of the power supply cables 20A, 20B includes, in order from the tip, a plug 24, a cleat 26, and a buffer 27. The plug 24 is a component that connects to the plug of the power supply destination. The cleat 26 is a component that secures the power supply cables 20A, 20B to the buffer 27. The buffer 27 is provided on the opposite side of the outlet 21 from the tip and is a component that absorbs shock. Rubber or the like may be used as the buffer 27. The buffer 27 absorbs shock that occurs when the outlet 21 is held in the holder 30A, 30B. Note that the buffer 27 is not limited to being provided on the outlet 21 and may be provided, for example, inside the holder 30. Furthermore, the guide roller 39 may be made of rubber or the like to function as the buffer 27.

[0032] A holding portion 30A is provided for the turning sheave 34A for the power feed cable 20A. A holding portion 30B is provided for the turning sheave 34B for the power feed cable 20B. The holding portion 30A holds the outlet 21 of the power feed cable 20A while the outlet 21 is placed on the turning sheave 34A. The holding portion 30B holds the outlet 21 of the power feed cable 20B while the outlet 21 is placed on the turning sheave 34B. In FIG. 3 , the outlet 21 of the power feed cable 20A is pulled out below the turning sheave 34A and is not held by the holding portion 30A. On the other hand, the outlet 21 of the power feed cable 20B is held by the holding portion 30B while it is placed on the turning sheave 34B. The state in which the outlet 21 is placed on the diverting sheave 34B means that the outlet 21 is extended in the length direction D1 and is supported from below by the diverting sheave 34B.

[0033] The holding portions 30A, 30B are formed in a box shape. Specifically, the holding portions 30A, 30B include a pair of side walls 36, 36 and an upper wall 37. The pair of side walls 36, 36 are arranged to sandwich the diverting sheaves 34A, 34B from the outside in the width direction D2. The pair of side walls 36, 36 have portions that protrude upward beyond the diverting sheaves 34A, 34B. The upper wall 37 is provided to connect the upper ends of the pair of side walls 36, 36 to each other. The upper wall 37 can cover the space between the pair of side walls 36, 36 from above. This allows the pair of side walls 36, 36 to cover the outlet 21 on both sides in the width direction D2 when it is placed on the diverting sheaves 34A, 34B. Additionally, the upper wall portion 37 can cover the outlet 21 from above when it is placed on the diverting sheaves 34A, 34B.

[0034] The pair of side walls 36, 36 have portions that protrude toward the seaward side in the longitudinal direction D1 beyond the diverting sheaves 34A, 34B. The retaining portions 30A, 30B open on the seaward side in the longitudinal direction D1. The pair of side walls 36, 36 have wide portions 38, 38 that widen in the width direction D2 at the seaward opening. The pair of wide portions 38 are inclined so that the distance between them increases as they approach the seaward side in the longitudinal direction D1 (see also FIG. 4).

[0035] The holding units 30A and 30B each have a pair of guide rollers 39 that guide the power cables 20A and 20B. The guide rollers 39 are provided on the landward side of the holding units 30A and 30B in the longitudinal direction D1. Rotation shafts 39a of the guide rollers 39 extend vertically. The guide rollers 39 are spaced apart in the width direction D2. The gap between the guide rollers 39 is set to a dimension that allows the power cables 20A and 20B to pass through but prevents the buffering portion 27 from passing through. When the power cables 20A and 20B are wound around the cable reel 22, the buffering portion 27 comes into contact with the guide rollers 39, restricting movement of the power cables 20A and 20B. As a result, the outlets 21 of the power cables 20A and 20B are held within the holding units 30A and 30B.

[0036] Next, the configurations of the connection mechanism 50 and the suspending part 4 will be described with reference to FIGS. 5 and 6. FIG. 5 is a perspective view of the suspending part 4. FIG. 6 is an exploded perspective view of the suspending part 4. Note that although the reference numerals for the power feed cables 20A and 20B are both shown in FIGS. 5 and 6, in use, either the power feed cable 20A or the power feed cable 20B is extended to the suspending part 4. As shown in FIGS. 5 and 6, the suspending part 4 includes a base part 40, a hook 41, and sheaves 42. The hook 41 is provided on the underside of the base part 40. The sheaves 42, around which the wire 6 is wound, are provided on the upper side of the base part 40. The sheaves 42 are arranged to be spaced apart from each other in the width direction D2.

[0037] The connection mechanism 50 includes a holding portion 51, support portions 52 and 53, and a cable drum 54. The holding portion 51 holds the plug 61 of the cable 60 to be supplied with power and the plug 24 connected to the plug 61. The outlet 21 and the plug 61 are held by the holding portion 51 while extending in the vertical direction. The holding portion 51 is provided on one side of the base 40 in the longitudinal direction D1. The support portion 52 within the holding portion 51 supports the plug 61 of the cable 60. The support portion 53 within the holding portion 51 supports the outlet 21 of the power supply cables 20A and 20B. As shown in FIG. 6 , the support portion 53 includes a first member 53a and a second member 53b provided within the holding portion 51. The first member 53a supports the upper end of the outlet 21, and the second member 53b supports the lower end of the outlet 21. Supporting portion 53 also has third member 53c, which is a separate member from holding portion 51. Third member 53c is attached to first member 53a, so that it can cover the upper end of outlet 21 from the outside of holding portion 51 (see FIG. 5).

[0038] As shown in FIGS. 5 and 6 , the cable drum 54 is provided on the suspension unit 4 and is a member around which the power supply cables 20A and 20B are wound. The cable drum 54 is provided at the center of the base unit 40 in the width direction D2, above the holding unit 51. The cable drum 54 has a winding unit 54a and side wall units 54b. The winding unit 54a is a disk-shaped member around whose outer circumferential surface the power supply cables 20A and 20B are wound. The winding unit 54a is disposed so that its central axis extends in the width direction D2. The side wall units 54b are disposed so as to sandwich the winding unit 54a from both sides in the width direction D2. The side wall units 54b extend upward from the upper surface of the base unit 40. Here, as shown in FIG. 5 , the cargo handling device 100 includes a cable pressing pin 56. The cable pressing pin 56 is a member that is inserted into the cable drum 54 so as to press down the power feed cables 20A, 20B wound around the cable drum 54. An insertion hole 57 is formed in each of the side walls 54b, 54b of the cable drum 54 below the winding portion 54a. The cable pressing pin 56 is inserted into the insertion hole 57 after the power feed cables 20A, 20B are wound around the winding portion 54a. As a result, the cable pressing pin 56 comes into contact with the bundle of power feed cables 20A, 20B wound around the winding portion 54a from the outer periphery, thereby supporting the bundle of power feed cables 20A, 20B.

[0039] Next, the procedure for disconnecting the outlet 21 of the power cable 20 from the hoisting unit 4 and holding it in the holding unit 30 will be described. For example, as shown in FIG. 1, the description begins with the state in which the outlet 21 of the power cable 20 is connected to the hoisting unit 4. First, as shown in FIG. 2, the jib 3 is folded to position the hoisting unit 4 at its minimum radius. At this time, the load is removed from the hoisting unit 4 to place it in an unloaded state. The hoisting unit 4 is lowered to the ground. As shown in FIG. 7, the worker WP removes the power cable 20 from the connection mechanism 50 (see also FIG. 5). The worker removes the outlet 21 of the power cable 20 from the mating plug 61 (see FIG. 5). At this time, the worker removes the outlet 21 from the plug 61 to replace the hoisting equipment. Next, the cargo handling device 100 controls the cable reel 22 to reel in the outlet 21 at a low speed (or inching). The cargo handling device 100 raises the outlet 21 to the position of the holding part 30, stops the lifting when the outlet 21 is held by the holding part 30, and applies a brake to hold the power supply cable 20. Note that the outlet 21 of another power supply cable 20 may be lowered onto the replaced hoisting tool.

[0040] Next, the operation and effect of the cargo handling apparatus 100 will be described.

[0041] First, a cargo handling apparatus 200 according to a comparative example shown in FIGS. 8 and 9 will be described. The cargo handling apparatus 200 according to the comparative example has a cable reel 121 provided on the slewing device 2 and a diverting sheave 122 provided at an intermediate position on the front link 3B. The power feed cable 20 extends from the cable reel 121 to the diverting sheave 122 and then extends from the diverting sheave 122 to the hoisting unit 4. With this configuration, as shown by the imaginary line in FIG. 8 , when the hoisting unit 4 is lowered to load and unload cargo such as a ship (position PG1), the power feed cable 20 interferes with the hatch coaming HC of the ship, making the power feed cable 20 susceptible to damage. Furthermore, particularly when the jib 3 is folded to the minimum radius (position PG2), the winding angle of the power feed cable 20 around the diverting sheave 122 becomes large. This accelerates bending fatigue of the power feed cable 20. Furthermore, as shown in FIG. 9, even when the power supply cable 20 is not in use, when the jib 3 is retracted or pushed out, the power supply cable 20 is squeezed by the diverting sheave 122 and deteriorated.

[0042] In a cargo handling apparatus 300 according to another comparative example shown in FIG. 10 , the power feed cable 20 is routed up to the position of the diverting sheave 16C at the tip of the jib 3, but does not have a holding unit 30. When replacing the hoisting gear, the jib is set to its maximum radius (the state shown in FIG. 1 ) and the inspection walkway 130 is made horizontal. In this state, the worker WP accesses the tip of the jib 3. The worker WP pulls up the power feed cable 20A, which will be unused, and secures the outlet 21 to the structure on the inspection walkway 130. At this time, the worker WP secures the retaining metal fitting of the power feed cable 20A with a shackle and secures the outlet 21 with a clamping metal fitting. Note that the location where the power feed cable 20 is pulled up and secured is a location where the power feed cable 20A does not pass during the normal process of unwinding and winding the power feed cable 20A. Therefore, the location where the power feed cable 20 is pulled up and secured does not correspond to the payout path CL of the power feed cable 20.

[0043] In contrast, in the cargo handling apparatus 100 according to this embodiment, the power supply cable 20 is reeled out along the jib 3 and has an outlet 21 at its end. Therefore, the outlet 21 of the power supply cable 20 is extended to the position of the hoisting device to which power is to be supplied, and the power supply cable 20 is reeled out when not in use. Here, the cargo handling apparatus 100 has a holding unit 30 that holds the outlet 21 on the reel-out path CL of the power supply cable 20. Therefore, by reeling out the power supply cable 20 along the reel-out path CL, the cargo handling apparatus 100 can easily hold the outlet in the holding unit 30 during the reel-out operation. As described above, the outlet 21 of the power supply cable 20 can be easily held.

[0044] Furthermore, in the cargo handling apparatus 100 according to this embodiment, the power supply cable 20 extends along the jib 3, extending from the tip of the jib 3 toward the hoisting part 4. Therefore, unlike the comparative example shown in Fig. 8, it is possible to prevent the power supply cable 20 from interfering with the hatch coaming HC of the ship. It is also possible to prevent the unused power supply cable 20 from having an increased winding angle at a position such as the steering sheave 34, and to prevent the power supply cable 20 from being squeezed by the steering sheave 34 when the jib 3 is retracted or pushed out.

[0045] The cargo handling device 100 is further provided with a steering sheave 34 that is provided at the tip of the jib 3 and that steers the power supply cable 20, and the holding unit 30 may hold the outlet 21 while the outlet 21 is resting on the steering sheave 34. In this case, the power supply cable 20 is rewound, and when the outlet 21 reaches the steering sheave 34, it can be protected by the holding unit 30 while remaining on the steering sheave 34. Furthermore, because the outlet 21 is resting on the steering sheave 34, the weight of the outlet 21 and the power supply cable 20 allows the power supply cable 20 to be easily pulled out of the steering sheave 34.

[0046] The holding unit 30 may have a guide roller 39 that guides the power supply cable 20. In this case, the guide roller 39 can smoothly guide the outlet 21 into the holding unit 30 when the power supply cable 20 is rewound.

[0047] The power supply cable 20 may have a buffer section 27 between the outlet 21 and the holding section 30. In this case, when the outlet 21 reaches the holding section 30, the buffer section 27 comes into contact with a component of the holding section 30. Therefore, the buffer section 27 can absorb the impact when the outlet 21 comes into contact with a component of the holding section 30.

[0048] The holding portion 30 may be formed in a box shape. In this case, the holding portion 30 can hold the outlet 21 with a simple configuration. Furthermore, by enclosing the outlet 21 in the box-shaped holding portion 30, the outlet 21 can be effectively protected from wind and rain. Furthermore, by enclosing the outlet 21 in the box-shaped holding portion 30, the outlet 21 can be prevented from falling off the holding portion 30.

[0049] The diverting sheave 34 may have a width corresponding to the outlet 21. In this case, the diverting sheave 34 can easily accommodate the outlet 21. Therefore, the holding portion 30 can hold the outlet 21 in a stable state on the diverting sheave 34.

[0050] The cargo handling device 100 may have a plurality of power supply cables. In this case, when a plurality of types of slings are used in the suspending portion 4, the power supply cables 20 suited to the types can be connected to the slings.

[0051] The cargo handling device 100 may further include a cable drum 54 that is provided on the hanging part 4 of the cargo handling unit and around which the power supply cable 20 is wound. In this case, the power supply cable 20 can be supported by being wound around the cable drum 54. Therefore, when a force acts on the power supply cable 20 in the unwinding direction, the wound part of the cable drum 54 can withstand the load, and therefore, it is possible to prevent the outlet 21 from becoming detached from the power supply target.

[0052] The cargo handling device 100 may further include a cable pressing pin 56 that is inserted into the cable drum 54 so as to press down the power supply cables 20 wound around the cable drum 54. In this case, the cable pressing pin 56 can prevent the bundle of power supply cables 20 wound around the cable drum 54 from coming apart.

[0053] The present invention is not limited to the above-described embodiments.

[0054] For example, in the above embodiment, the holding unit 30 is provided at the tip of the jib 3, but the holding unit 30 may be provided anywhere on the payout path CL. For example, a configuration may be adopted in which the holding unit 30 is provided at a position slightly closer to the cable reel 22 from the tip of the jib 3.

[0055] FIG. 11 is a diagram showing a cargo handling apparatus 100 according to a modified example. As shown in FIG. 11, the cargo handling apparatus 100 according to the modified example is a jib crane 400. The jib crane 400 is a crane that can rotate and travel. The jib crane 400 has legs 101A and 101B, a tower body 102, a slewing device 103, a jib 104, and a mast 106. The jib 104 is connected to one end of the slewing device 103 by a pin. The jib 104 extends from one end of the slewing device 103 as a base end. The mast 106 is erected on the slewing device 103. The other end of the slewing device 103, a mast top which is the upper end of the mast 106, and the tip of the jib 104 are supported by wire ropes 107. As the wire rope 107 is wound up and unwound, the jib 104 raises and lowers with its base end as a fulcrum. A wire rope 107 separate from the wire rope 107 used for raising and lowering is connected to the suspending part 105. As the wire rope 107 is wound up and unwound, the suspending part 105 moves up and down.

[0056] The cable reel 111 is provided at a position midway between the base end and the tip end at the top of the jib 104. The jib tip sheaves 108, 120 are provided at the tip end of the jib 104. The jib tip sheave 108 guides the wire rope 107, and the jib tip sheave 120 guides the power supply cable 110. The diverting sheave 112 is provided at a position midway between the jib tip sheave 108 and the cable reel 111 at the bottom of the jib 104.

[0057] The power feed cable 110 is pulled out from the revolving device 103, extends along the upper part of the jib 104 toward the tip end, and is wound and stored on a cable reel 111. The power feed cable 110 also extends from the cable reel 111 toward the jib tip sheave 120 toward the tip end. The power feed cable 110 is folded back along the jib tip sheave 120 at the tip end of the jib 104 from the upper part of the jib 104 toward the lower part of the jib 104. The power feed cable 110 extends from the jib tip sheave 120 along the lower part of the jib 104 toward the base end. The power feed cable 110 is diverted along the diverting sheave 112 and extends toward the hoisting part 105. A holding part 140 is provided for the diverting sheave 112 for the power feed cable 110. The holding portion 140 is provided between the diverting sheave 112 and the lower portion of the jib 104. The holding portion 140 holds the outlet of the power supply cable 110 in a state where the outlet is placed on the diverting sheave 112.

[0058] Furthermore, the shape of the holding portion 30 does not have to be the box-like shape described above, and any shape that can hold the outlet 21 may be adopted. [Explanation of symbols]

[0059] 3,104...jib (cargo handling section), 4...hanging section, 105 (cargo handling section), 20,110...power supply cable, 21...outlet (connection section), 27...buffer section, 30,140...holding section, 34,112...diverting sheave, 39...guide roller, 54,111...cable drum, 56...cable holding pin, 100...cargo handling device.

Claims

1. A cargo handling device including a cargo handling unit, a power supply cable that is unwound along the loading / unloading section and has a connection section at an end thereof; a holding portion that holds the connection portion on a payout path of the power supply cable.

2. Further, a deflecting sheave is provided at the tip of the loading / unloading unit and deflects the power supply cable, The cargo handling apparatus according to claim 1 , wherein the holding portion holds the connecting portion in a state where the connecting portion is placed on the diverting sheave.

3. The cargo handling apparatus according to claim 1 , wherein the holding portion has a guide roller that guides the power supply cable.

4. The cargo handling apparatus according to claim 1 , further comprising a buffer portion between the connecting portion and the holding portion.

5. The cargo handling apparatus according to claim 1 , wherein the holding portion is formed in a box shape.

6. 3. The material handling apparatus according to claim 2, wherein the diverting sheave has a width corresponding to the connecting portion.

7. The cargo handling apparatus according to claim 1 , comprising a plurality of said power supply cables.

8. The cargo handling device according to claim 1 , further comprising a cable drum provided on the hanging part of the cargo handling unit and around which the power supply cable is wound.

9. The cargo handling device according to claim 8 , further comprising a cable pressing pin that is inserted into the cable drum so as to press down the power supply cable wound around the cable drum.

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