JPS5925715B2 - Movable deck lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a movable deck provided in multiple stages in a ship's hold, and particularly to a lifting device for the movable deck.

Conventionally, in bulk cargo and vehicle carriers,
As shown in Fig. 1, multi-tiered movable decks ID, 2D, ...6D for mounting vehicles are provided in the hold.
When loading bulk cargo, the upper movable deck 5. Connect each movable deck ID, 2D, and 3D with rope 1 with one end anchored to D.
, 4D can be lifted upward by driving the rope 1 with the trolley 2 and winch W while holding the rope 1.

By the way, if there is an inclined side wall 3 at the bottom of the hold, the movable deck 1D along this is connected to each movable deck 2D above it, etc.
Since the width is narrower than that of the rope 1, the rope 1 is bent and guided by the sheaves 4 and 5 in a short section on the movable deck 3D.

For this reason, when lowering the movable deck ID, 4D, a large amount of resistance is generated at the bent portion of the rope 1 by the sheaves 4 and 5, and the portion of the movable deck 3D on the side wall of the hold becomes difficult to lower. Partly because the center of gravity of the lowest movable deck 1D is closer to the inside of the ship than the center of gravity of the other movable decks 2D, 4D, etc., the entire movable deck is There is a problem in that it tends to descend while tilting the inner edge downward.

Also, when hoisting the movable deck ID, 4D, the entire movable deck has a tendency to tilt its inboard edge downwards due to the above-mentioned center of gravity position. edge,
Although the resistance at the bent portion of the rope 1 in the sheaves 4 and 5 works to slightly correct the tendency of the movable deck to tilt, the movable deck ID still remains...
・The 4D tries to tilt the inboard edge downwards due to the position of the center of gravity as a whole.

The present invention aims to solve these problems.
To provide a movable deck lifting device suitably equipped with an auxiliary rope so that the movable deck can be smoothly raised and lowered and its posture stabilized during the raising and lowering.

For this reason, the device of the present invention is arranged in a multi-stage manner along the above-mentioned hold side wall and the lower hold inclined side wall inside a hold having a vertical hold side wall and a lower hold inclined side wall that slopes downward from the lower end toward the inside of the ship. The movable decks are equipped with movable decks, and a main rope is disposed to suspend the movable decks so that they can be lifted up.One end of the main rope is anchored to the upper part of the hold, and the movable decks The movable deck is arranged vertically downward along the end of the side wall of the cargo hold, bent slightly inward in the middle, and then arranged downward again to follow the inclined side wall of the lower part of the cargo hold. The lower end of the lower movable deck is anchored to the inboard end of the lowermost movable deck, and the upper movable deck is connected to the rope drive mechanism. It is characterized by being equipped with an auxiliary rope connected to a rope drive mechanism.

Hereinafter, a lifting device for a movable deck for loading vehicles on a carrier for bulk cargo and vehicles as an embodiment of the present invention will be explained with reference to the drawings. FIG. , a vertical cargo hold side wall 10a and a lower cargo hold inclined side wall 10b that slopes downward from its lower end toward the inside of the ship.
→The hold side wall 10a and the hold lower inclined side wall 1! Multi-stage vehicle mounting movable decks ID, 2D, . . . 6D are provided along the ob.

When loading bulk cargo, the upper movable deck 5D
The main rope 11, which has one end 11a anchored, connects to each of the movable decks ID, 2D, and 3D below.

While holding 4D, Toro! It is driven by a rope drive mechanism consisting of J-12 and winch W.

Each movable deck ID,...4D is lifted from below by the main rope 11 so as to closely overlap with the movable deck 5D on the upper layer, and then raised slightly by means not shown together with the movable deck on the upper layer 5D. Then, it is rotated and stored along the sloping bottom surface 13a of the top side tank 13 together with the uppermost movable deck 6D.

In addition, since an inclined side wall 10b is formed at the lower part of the hold 10, the lowest movable deck 1D along this is narrower than each movable deck 2D above it. Therefore, the main rope 11 is bent and guided almost horizontally by the sheaves 15 and 16 in a short section on the movable deck 3D midway.

Note that the movable decks are connected to each other by articulated links or chains, as in conventional decks.

Furthermore, this device has each movable deck ID and 2D.

Auxiliary rope 17 to ensure stability when ascending and descending in 3D and 4D
is provided, and this auxiliary rope 17 has a lower end 17a
is anchored to the inboard end of the lowermost movable deck 1D, facing upward, and connected to the trolley 12.

The length of the auxiliary rope 17 is set to be half the length of the main rope 11 (the length of the winding up and the length of the winding down).

In FIG. 2, numerals 18 to 24 indicate sheaves that guide the main rope 11.

That is, the main rope 11 passes through the upper movable decks 4D and 3D along the hold side wall 10a, is bent and guided by the sheaves 15 and 16 with the movable deck 3D, and then passes through the movable decks 2D and 3D.
Sheaves 18 and 19 with movable deck 1D pass through ID.
and then upward to each sheave 20-23.
After passing through the sheave 24 with the trolley 12, its tip 11b is anchored to a anchor portion 25 in the hull.

Further, in FIG. 2, numerals 30 to 34 indicate sheaves that guide the auxiliary ropes, and the lower end 17a is connected to the lowermost movable deck 1.
The other end 17b of the auxiliary rope 17 anchored to D is guided to each sheave 30 to 34, and then anchored to a locking portion 35 of the trolley 12.

The trolley 12 is movably arranged in the direction of the ship's ship, and has a winch rope 3 guided by a sheave 26 provided on the trolley 12 and each sheave 27 to 29 attached to the hull.
6 and is driven by a winch W.

In addition, the symbol S in FIG. 2 indicates the ship's side outer plate, H indicates the batch coaming, and 10c indicates the bottom of the hold.

Since the movable deck lifting device of the present invention is constructed as described above, each movable deck ID, 2D,
When lifting 3D and 4D, combined with the action of the auxiliary rope 17, the movable deck ID.

...When the edge of the 4D on the S side of the ship's side outer plate rises, the edge on the inside of the ship also rises, so keep it roughly horizontal and lift each movable deck ID...4D. Ascension takes place.

In other words, because the center of gravity of the narrow movable deck 1D, which is the lowest layer, is closer to the inside of the ship than the center of gravity of the other wide movable decks 2D, 3D, and 4D, they rise together. The action of the auxiliary rope 17 can prevent the inner edge of the ship from tilting downward when doing so.

Also, when lowering each movable deck ID, 4D, the main rope 11 is connected to the sheave 15°16 with movable deck 3D
In particular, because the movable deck 1D, which has its center of gravity on the inboard side, is integrated from below via the middle movable deck 2D, it is difficult for movable deck 3D to descend horizontally. The problem that it is difficult to move can be solved by restricting the auxiliary rope 17 from descending first on the inboard edge of the movable deck 3D, thereby lowering the edge on the side shell S side at the same time as the inboard edge. Ru.

The load on the auxiliary rope 17 is extremely small because the main rope 11 supports most of the weight of the movable deck, and the length of the auxiliary rope 17 can be short, so that the installation of the auxiliary rope 17 is easy. The cost will not increase significantly.

Furthermore, when the movable deck is hoisted up, the auxiliary rope 17 is also hoisted up, so that there is no problem in loading and unloading the bulk cargo.

As detailed above, according to the movable deck lifting device of the present invention, each movable deck can be smoothly raised and lowered in a horizontally stable state by the action of the auxiliary rope, regardless of local bending of the main rope. This has the advantage of contributing to improved work efficiency and safety.

[Brief explanation of drawings]

FIG. 1 is a cutaway perspective view showing the main parts of a conventional movable deck lifting device, and FIG. 2 is a cutaway perspective view showing the main parts of a movable deck lifting device as an embodiment of the present invention. be. ID, 2D, 3D, 4D, 5D, 6D... Movable deck, 10... Hold, 10a... Hold side wall, 10b... Hold lower inclined side wall , 10c・
...Bottom of the hold, 11...Main rope, 11a
, 11b... End of main rope 11, 12...
...Trolley, 13...Top side tank, 13a...Bottom surface of top side tank 13, 15, 16...Sheave, 17...
Auxiliary rope, 17a, 17b...Auxiliary rope 1
End portion of 7, 18-24... Sheave for guiding the main rope 11, 25... Root portion, 26...
- Sheaves of the trolley 12, 27-29... Sheaves, 30-34... Sheaves that guide the auxiliary rope 18, 35... Locking portions of the trolley 12, 36
・・・－・・・Winch rope, W・・・・Winch, S・・・・Ship side outer plate, H・・・・Batch coaming.

Claims (1)

[Claims] 1. A movable deck arranged in multiple stages along the above-mentioned hold side wall and the lower hold sloping side wall, inside a hold having a vertical hold side wall and a lower hold sloping side wall that slopes downward from the lower end toward the inside of the ship; A main rope is provided to hang these movable decks so that they can be lifted up, and one end of the main rope is anchored to the upper part of the hold, and the end of the movable deck is attached to the side wall of the hold. It is arranged vertically downward along the ship, bent slightly inward in the middle, and then arranged downward again, passing under the movable deck along the lower sloped side wall of the hold above, and then upward. In order to ensure stability when each movable deck is raised and lowered, the lower end is anchored to the inboard end of the lowermost movable deck, and the movable deck is connected upward to the rope drive mechanism. A movable deck lifting device characterized in that it is equipped with an auxiliary rope.