JPH026057Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a ship crane for dumping, for example, drums containing low radioactive waste from a ship onto the sea surface.

Conventional technology It has been considered to dump drums containing low-radioactive waste into the ocean, but with a ship crane installed on a normal ship, the lower end of the wire rope is connected to the drum, and the wire rope is hoisted up. After lifting the drum from inside the hold and swiveling the crane, the wire rope is unwound and the drum is dumped onto the sea surface.

Problems to be Solved by the Invention According to the above-mentioned conventional structure, under severe conditions at sea, the lifted drum can swing and there is a risk that the drum can unexpectedly collide with the ship's hull. If the drum collides with the ship's hull and cracks occur, the radioactive waste inside will leak out. Also, the impact when it was thrown into the sea was great.

Means for Solving the Problem In order to solve the above problem, the marine crane of the present invention is provided with a crane main body that is movable along the bow and stern direction on the upper deck of the ship, A transverse truck movable along a direction, a conveyor device disposed along the transverse direction of the ship, and a shutter disposed continuously at an end of the conveyor device and inclined toward the sea surface outside the ship,
The above-mentioned transverse truck is provided with an elevating rod that is supported so as to be movable up and down, and a gripping device is provided at the lower end of the elevating rod for gripping the drum in the container, and the gripping device is
A swinging mechanism is provided that is rotatable around upper and lower horizontal axes that are orthogonal to each other.

When transporting objects overboard in the above configuration, first move the crane main body to bring it to a predetermined position, then move the traversing truck appropriately, lower the elevating rod, and use the gripping device to pick up the drum can. , raise the lifting rod, operate the oscillation mechanism to lay the drum on the conveyor device along the conveyor transport direction, release the gripping device to transfer the drum to the conveyor device, and then move the drum to the conveyor device. Activate the device. Then, the drum can is reliably conveyed to the shooter in a stable posture by the conveyor device, and the drum is slid down the shooter in the height direction and thrown into the sea surface in a stable attitude.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings. This embodiment relates to a ship crane for dumping drums 4 containing low radioactivity waste into the ocean from a plurality of containers 3 arranged in a hold 2 of a ship hull 1. The container 3 above is a container main body 3A.
It consists of an upper lid 3B and an inner lid 3C, in which 24 drums 4 each weighing approximately 500 kg are placed on the upper and lower sides.
There are 48 pieces in total. Reference numeral 5 denotes a crane body disposed movably in the directions of arrows A and B on rails 7 along the bow and stern direction on the upper deck 6, and a pair of frames 5A disposed on each rail 7; It is composed of an upper crossbeam 5B and a lower crossbeam 5C disposed between both frames 5A, and a self-propelled device 5D disposed below each frame 5A. 8 is each frame 5A
Container lid lifting devices 9 and 10 are transverse carts disposed on the crossbeams 5B and 5C so as to be movable in the directions of arrows C and D, respectively, and are integrally connected to each other via a connecting rod 11. has been done. 12 is a belt conveyor device arranged along the transverse direction of the ship at the lower part between both frames 5A, 13 is both transverse carts 9,
Reference numeral 10 denotes a lifting rod that is supported so as to be able to rise and lower; 14 is a gripping device provided at the lower end of the lifting rod 13; 15 is a swinging mechanism for swinging the gripping device 14; and 16 is a base end connected to the conveyor device 12. The shutter is connected to the tip of the shutter so as to be able to swing in the directions of arrows E and F.The tip of the shutter is tilted downward along the sea surface outside the ship, and carries the drum cans 4 sent by the conveyor device 12 along the height direction thereof. It can be slid down and thrown onto the sea surface in a stable position with little impact.

The container lid lifting device 8 is shown in FIGS.
As shown in the figure, a bracket 1 has a frame body 5A at both ends.
8, a pair of rotating frames 20 rotatably supported in the directions of arrows G and H via a vertical shaft 19, and the rotating frames 20
a first cylinder 22 whose main body is connected to the frame 5A and whose piston rod is connected to one rotating frame 20.
The bracket 23 hangs down from the lower end of the rotating frame 20, and the end of the piston rod is attached to the upper cover 3B.
A second cylinder 2 is directly connected to the bracket 23 of the inner lid 3C via a pin 25 via a piece 24.
It consists of 6. The elevating rod 13 is composed of an outer cylinder 13A inserted into the through holes 27 of both the transverse carts 9 and 10, and an inner cylinder 13B inserted into the outer cylinder 13A so as to be able to rise and fall freely. A retaining flange 29 is provided, and a pair of slits 30 are formed along the vertical direction.

A rack 31 is provided at a location facing the slit 30 of the inner cylinder 13B, and each of the traversing carts 9, 10
A pinion 32 disposed in the two is in mesh with each other. 33
34 is a guide roller which is rotatably disposed on each of the transverse carts 9, 10 and comes into contact with the outer cylinder 13A, and 34 is a protrusion protruding from the lower part of the inner cylinder 13B. This protrusion 34
When it comes into contact with the lower surface of the inner cylinder 13B,
As the outer cylinder 13A is raised, the outer cylinder 13A is also raised. The swinging mechanism 15 includes a rotating plate 36 rotatably connected to the lower end of the inner cylinder 13B via an upper horizontal shaft 35 in the directions of arrows I and J, and an upper horizontal shaft 35 attached to the lower surface of the rotating plate 36. A support body 38 is rotatably connected in the directions of arrows K and L via a lower horizontal shaft 37 disposed along a direction perpendicular to It is comprised of a third cylinder 39 which is connected to the rotating plate 36 by a pin, and a fourth cylinder 40 whose main body is connected to the rotating plate 36 by a pin and whose piston rod tip is connected by a pin to the support body 38. The gripping device 14 includes a pair of gripping arms 43 whose upper ends are suspended from the lower part of the support body 38 via a support shaft 42 so as to be rotatable in the directions of arrows M and N, and both gripping arms 4 .
and a fifth cylinder 44 disposed between the third and third gripping arms 44, and gripping claws 45 fixed to the lower ends of the respective gripping arms 44 and brought into contact with the outer peripheral surface of the drum can 4. In FIG. 2, reference numeral 46 denotes a winch for rotating the shooter disposed on the crane body 5, and a wire rope 47 extending from the drum.
The tip of the shutter 16 is connected to the tip of the shutter 16 .

The operation of the above configuration will be explained below. First, as shown in Figure 1, a container 3 containing 4 drums is placed in the hold 2.
After the ship stored in the container is sailed to a dumping position in the ocean, the hatch cover is removed and the crane main body 5 is driven to bring it above a predetermined container 3. Next, extend the piston rod of the first cylinder 22,
The rotation frame 20 in the state shown in the imaginary line in FIG. 7 is rotated in the direction of arrow H to bring it into the state shown in the solid line in FIG. Next, the piston rod of the second cylinder 26 is extended, and the piston rod of the second cylinder 26 is extended.
The pin 25 is connected to the bracket 23 of the upper lid 3B as shown by the solid line in the figure. Next, after releasing the fixation of the upper lid 3B, the piston rod of the second cylinder 26 is contracted and the upper lid 3B is lifted as shown by the imaginary line in FIG.

Next, the crane main body 5 is moved to above the adjacent container 3, the piston rod of the second cylinder 26 is extended, the upper cover 3B is placed on the adjacent container 3, and the pin 25 is extracted. Next, the crane body 5 is moved and brought above the original container 3. Next, the winch 46 is operated to rewind the wire rope 47, and the shooter 16 is rotated in the direction of arrow F, bringing its tip close to the sea surface. Next, the traversing carts 9 and 10 are moved to bring the lifting rod 13 directly below a predetermined drum can 4. Next, the fifth cylinder 44 is operated to rotate the gripping arm 43 in the direction of arrow M. Next, the pinion 32 is rotated in one direction by a drive device (not shown), and the lifting rod 13 is lowered via the rack 31. As a result, when the gripping pawl 45 is inserted into the gap between the drums 4 and reaches a position facing the outer peripheral surface of a predetermined drum 4, the rotation of the pinion 32 is stopped. At this time, if the lifting rod 13 is misaligned with respect to the predetermined drum 4, the third and fourth cylinders 3
9 and 40 as appropriate to swing the grip device 14 and insert the grip claw 45 into the gap between the drums 4. Next, the fifth cylinder 44
The gripping arm 43 is rotated in the direction of arrow N, and the drum can 4 is gripped by the gripping claw 45. Next, the pinion 32 is rotated in the other direction to lift the drum 4 and bring it above the belt conveyor device 12.

Next, the gripping device 14 is rotated in the direction of arrow J by the third cylinder 39 to bring it into the state shown in the imaginary line in FIG. Next, the lifting rod 13 is lowered to place the drum can 4 on the belt of the belt conveyor device 12. Next, the gripping arm 43 is rotated in the direction of arrow M by the fifth cylinder 44 to release the grip on the drum 4, and at the same time, the third and fourth cylinders 39 and 40 are operated appropriately to remove the drum 4. As shown by the imaginary line in FIG. 4, it is laid down on the belt along the conveyance direction. Next, the belt conveyor device 12 is operated to convey the drum can 4 in the direction of arrow D. When reaching the shooter 16, the drum can 4 slides on the shooter 16 in the height direction of the drum can 4, is dumped onto the sea surface, and sinks to the seabed.

After dumping the upper drums 4 of the container 3 as described above, the second cylinder 26 is brought above the container 3 as shown in FIG.
The lower end of the piece 24 is connected to the bracket 23 of the inner lid 3C with a pin 25, and the piston rod of the second cylinder 26 is reduced to lift the inner lid 3C above the container 3. In the same procedure as above, the inner lid 3C is placed on the adjacent container 3, and the lower drums 4 of the container 3 are dumped into the ocean one after another.

In the above embodiment, the case where the drums 4 are dumped one by one has been explained as an example, but the gripping device 14 can be devised to dump two or more drums at a time.

Effects of the invention As described above, according to the invention, the lifting rod is raised and lowered to lift the drum, the swinging mechanism is used to place the drum on the belt conveyor device in the conveying direction, and the drum is released. Since the drum cans are transported and slid down on the shooter, even in harsh ocean conditions, the drum cans can be dumped onto the sea surface extremely safely and efficiently, without being shocked or damaged as in the case of conventional methods. Therefore, it is ideal for dumping low radioactive waste into the ocean.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view, Fig. 2 is a cross-sectional view, Fig. 3 is a cross-sectional view of the main part, Fig. 4 is a view taken along the - arrow in Fig. 3, Fig. 5 is a view taken from the - arrow in Fig. 3, Fig. 6 is a front view of the top lid being lifted by the container lid lifting device, Fig. 7 is a view taken from the - arrow shown in Fig. 6, and Fig. 8 is the container lid lifting device. FIG. 3 is a front view of the inner lid in a lifted state. 3... Container, 4... Drum (object to be transported),
5... Crane body, 6... Upper deck, 9, 10...
...Transverse truck, 12... Belt conveyor device, 13
. . . Lifting rod, 14 . . . Grip device, 15 . . . Oscillating mechanism, 35 .

Claims (1)

[Scope of utility model registration request] A crane main body that is movable along the bow and stern direction is provided on the upper deck of the ship, and the crane main body is equipped with a transverse truck that is movable along the transverse direction of the ship, and a conveyor that is disposed along the transverse direction of the ship. and a shutter which is arranged continuously at the end of the conveyor device and is inclined toward the sea surface outside the ship, and an elevator rod supported on the above-mentioned transverse truck so as to be able to rise and lower, and a lower end of the elevator rod is provided. 1. A ship crane, comprising a gripping device for gripping drums in a container, and a swinging mechanism that allows the gripping device to freely rotate around upper and lower horizontal axes that are orthogonal to each other.