JPH019760Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a towing rope that is used to unwind and pull up a towing rope (also called a fire rope) used when a tugboat is used to tow a large ship such as a tanker in an emergency. The present invention relates to a towing rope device, and more particularly to a towing rope device that is automatically adjusted so that the end eye of the rope is always at a constant height above the sea surface.

(Background technology) When a disaster occurs in the tanker itself or in a land complex while a large vessel such as a tanker is moored, the tanker, etc. is towed in an emergency to ensure safety in order to prevent the disaster from spreading. It will be done.

In order to deal with emergencies such as those mentioned above,
All tankers are required to have fire ropes hanging from the bow and stern while berthing.

That is, as shown in FIGS. 1 and 2, a rope 4 wound around a winch 3 installed on a deck 2 of a tanker 1 is hung toward the sea surface 5.

However, the water line of the tanker 1 fluctuates greatly depending on the amount of cargo. In the case of a 200,000 ton tanker, the change in the water line can be as much as 20 meters.

Therefore, the end eye 6 of the rope 4 is located high above the sea level 5 (FIG. 1) or is deeply submerged below the sea surface (FIG. 2).

Therefore, when the tugboat 7 attempts to tow the tanker 1 in an emergency, it may be impossible for the worker on the tugboat 7 to pull the tip eye 6 by hand (Fig. 1) or it will be extremely difficult. A situation may arise where this happens. That is, the tanker 1 can only be towed by locking the tip eye 6 to the towing hook 8 of the tugboat 7, but there is a problem in that this locking operation cannot be performed quickly.

Therefore, conventionally, regarding the fire rope 5,
An onboard worker on the tanker constantly performs adjustment work such as letting out or pulling up according to the ups and downs of the tanker, and maintains the tip eye 6 at a height position that makes it easy to take over the tanker. However, cargo handling work for tanker 1 is carried out day and night, regardless of the weather, so adjustment work at night or during strong winds or rain is extremely dangerous. Moreover, during cargo handling operations, the water content changes continuously, and therefore adjustment work must be done continuously, which is extremely troublesome and time-consuming, and even then, perfect adjustment work cannot be expected. Nakatsuta.

(Purpose of the invention) Therefore, the purpose of this invention was to prevent the eye at the end of the rope from changing due to fluctuations in the tight water line of large ships such as tankers.
To provide an improved towing rope device having a structure that is automatically adjusted to a height position where it is easy for a worker on a tugboat to pick it up and lock it on a towing hook.

(Structure and effect of the invention) In order to achieve the above object, the towing rope device of this invention has a winch that winds a fire rope.
It is a hydraulic auto-tension winch that detects the magnitude of the tension applied to the rope relative to the set value and rotates forward and backward, and has a configuration in which a float of weight that applies a predetermined tension to the rope is connected to the eye at the end of the rope. has been done.

In other words, when the water line of the ship rises, the rope between the winch and the float becomes slack, and the rope tension decreases. The auto-tension winch detects this tension drop and automatically operates in the direction of winding the rope. When the rope becomes taut and reaches the set tension, it detects this and automatically stops.

Conversely, if the waterline of the ship is lowered, the float will be lifted above the sea level or into the air;
The rope tension increases due to the weight of the float. The auto-tension winch that detects this increase in tension automatically operates in the direction of paying out the rope. After that, the float descends to a predetermined position in the sea, and when the rope tension drops to the set value, this is detected and the winch automatically stops.

In this way, the eye at the end of the rope is automatically adjusted to a predetermined height above the sea surface, so the emergency tugboat worker can quickly lock the eye at the end to the towing hook and begin towing the vessel immediately, making it possible to adequately deal with emergencies. It is.

Hydraulic auto-tension winches also allow configurations that accommodate the undesirability of using electrical equipment in explosion-proof areas.

(Example) Next, the example shown in FIGS. 3 and 4 will be described.

In the figure, 10 is a hydraulic auto-tension winch, and 11 is a float. Other symbols are the same as those in FIGS. 1 and 2.

For example, when the waterline of the tanker 1 drops to the lowest limit, the auto-tension winch 10 has its own weight equal to the length of the rope 4 let out to reach the sea surface, and about 2/3 of the weight of the float 11. The weight to which the degree is added is set as the set value. Therefore, the rope tension is greater than the set value (i.e., the float 11
, and the rope 4 is taut. ), the auto-tension winch 10 reverses and lets out the rope 4. Conversely, when the rope tension is smaller than the set value (that is, the rope 4 is slack), the auto tension winch 10
rotates forward and winds up the rope 4.

On the other hand, the float 11 is heavy enough to apply considerable tension to the rope 4;
It is connected to the end of the tip eye 6 with a short connecting rope 12 of about 1.5 m to 1.5 m.

Therefore, whether the tight water line of the tanker 1 falls as shown in FIG. 3 or rises as shown in FIG. 4, the end eye 6 of the rope 4 will It is held at a constant height h above the sea surface by a length equivalent to the length of the connecting rope 12.

Therefore, in the event of an emergency, the operator on the tugboat 7 can easily take over the tip eye 6, lock it to the towing hook 8, and quickly tow it away at any time.

[Brief explanation of the drawing]

FIGS. 1 and 2 are explanatory views showing how the conventional towing rope device is used, and FIGS. 3 and 4 are explanatory views showing how the towing rope device according to the invention is used. 1...tanker, 2...deck, 4...rope, 6...tip eye, 10...auto tension winch, 11...float.

Claims (1)

[Scope of utility model registration request] In a towing rope device that suspends a rope 4 wound around a winch on the deck 2 of a large ship such as a tanker 1 above the sea surface, a predetermined tension is applied to the rope 4 at the end of a tip eye 6 fixed to the rope 4. Floats 11 with a weight to be loaded are connected by a connecting rope of a predetermined length, and the winch detects that the float 11 is lifted above the sea surface and that the rope 4 is slack as it floats to the sea surface. This towing rope device is characterized in that it is constituted by an auto-tension winch 10 that detects the magnitude of the tension and rotates forward and backward so that if the tension is large, the rope 4 is paid out, and if the tension is small, the rope 4 is wound up.