JPH03235795A - Mounting type ice resisting equipment for life raft - Google Patents

Abstract

PURPOSE:To protect a life raft from an ice board by joining a bottom plate and a side plate, made of a rigid substance, with the surroundings of an expansion type life raft so that the side plate is rotatable in a given angle range to form ice resisting equipment. CONSTITUTION:Ice resisting equipment comprises a side plate A divided into a plurality of sections, and a single bottom plate B with which the bottom of the side plate A is coupled by means of hinges. By utilizing a mounting metal I for a raft hanging rope E, located in the vicinity of the hinge part, the grasping rope mounting part is tied with a rope and mounted on the life raft. A metal G for traction and a wire H are mounted on the bottom part of ice resisting equipment, and this constitution tows the life raft among pieces of floating ice and on an ice board.

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention is directed to an inflatable life raft, and relates to water-resistant equipment attached to the inflatable life raft.The field of industrial application is for ships on nine international routes. belongs to. Among these, it is used as life-saving equipment to be stowed on ships navigating in cold waters such as the Arctic Ocean, and on marine structures operating in these waters.

Conventional technology The inflatable life rafts used in the past have been designed to withstand temperatures below zero according to the 5OLAS (International Convention for the Safety of Life at Sea).
It is said to have a structure that can withstand temperatures of 0 degrees.

There are insufficient measures for use in aquatic environments with temperatures below -30 degrees Celsius, such as in the Arctic Ocean.

In particular, conventional rafts have water resistance measures for use within drift ice areas,
No measures were taken to prevent movement on the ice floes.

In addition, in order to reduce the risk of crew members getting wet with low-temperature seawater in cold waters, it is important to consider whether it is better to suspend and launch an inflatable life raft, or to use ropes to suspend the life raft or rubber-coated cloth, etc. to the body of the species. Since it is fixed by the adhesive used, in a low-temperature environment of -30 degrees Celsius or less, the adhesive part may peel off, making it difficult to ensure sufficient strength, and countermeasures regarding the material or construction are required.

Furthermore, there are many technical difficulties in stably launching an inflatable life raft under strong winds, and solutions are desired.

C. Problems to be Solved by the Invention The present invention solves the lack of response to water and sea in the conventional technology, and is suitable for emergencies in icy areas as a water and sea lifesaving system that utilizes life rafts. They dispersed and escaped using life rafts placed in the area.

In order to achieve a system for evacuating life rafts that have landed in the sea to a safe place by self-destruction or towing, the first step is ■
This is an attempt to solve the problems from ■.

■ If the inflatable life raft collides with the water basin or is compressed by the water basin, the main buoyancy chamber and floor air chamber of the raft should be protected so that the raft itself will not come into direct contact with the basin and be damaged. . In addition, equipment to protect inflatable life rafts is being squeezed by the water basin.

To enable evacuation onto the ice floe by providing a life raft with the function of raising it above the ice floe.

■ Enable hanging ropes for launching inflatable liferafts to be attached to equipment for protecting inflatable liferafts.

■ A removable anchor will be installed to improve the stability of the inflatable life raft when launched in strong winds and under wind waves.

D. Means for Solving the Problems The present invention attempts to solve one problem by means of (1) to (3) by devising water-resistant equipment to be attached to the inflatable life raft without directly implementing measures on the inflatable life raft itself. It is.

■ The wearable ice-proof equipment for life rafts according to the present invention uses a rigid body that is lightweight, strong, and has a small coefficient of friction with ice, and covers the main buoyancy chamber and floor air chamber of the life raft from the outside. Life rafts can now be protected from water basins.

In addition, the wearable water-resistant equipment has a structure that allows it to withstand the pressure of the water basin when the life raft is pressed by the water basin, and to rise above the water basin as it becomes pressurized by the water basin.

■ The rigid, wearable water-resistant equipment is equipped with a rope attachment part that is integrated with the water-resistant equipment, and the rope used to suspend the life raft is secured, making the conventional installation more secure.

■ In order to launch the inflatable life raft stably in strong winds, a large water-retentive anchor is installed separately from the raft, and before the raft is launched, it is suspended from the sea using an anchor hanging rope and then deployed. In order to launch the life raft using the anchor hanging rope as a guide, we installed guide fittings for launching on the wearable water resistant equipment.

■ Towing equipment consisting of wire and towing metal fittings strong enough to tow a life raft with a maximum number of people on board was attached to the wearable water-resistant equipment.

■ A large anchor was attached to the towing bracket to improve the stability of the inflatable life raft in wind and waves.

E. Function: An example of the wearable ice-resistant equipment for life rafts according to the present invention is shown in FIG. 1. The wearable water-resistant equipment has the following functions.
This protects the attached inflatable life raft from pressure and collisions with ice floes, and also enables evacuation by running onto the ice.

``The side plates A are attached to the bottom plate B so as to be rotatable inward by hinge joints, etc., and a rubberized cloth C reinforced with aramid fiber is attached between adjacent side plates so as not to impair the rotation function of the side plates.

If the wearable water resistant equipment is pressed by a water basin or the like from the side plates A-■ and 8-■, the side plates A-■ and 8-■ will be rotated inward as they are pressed by the ice floes. When the side plate rotates to a certain angle, it will be supported at multiple points such as adjacent side plates via the stopper D and the rubberized cloth.
Be able to withstand the pressure of the basin. When further pressure is applied, just as a bent leaf spring rebounds and returns to its original shape, the deformation energy stored in the water-resistant equipment rebounds against the water basin and is released by sliding up the basin wall, and then the water-resistant equipment When it is compressed, it repeats the action of rising further,
Gradually rising above the ice floe, the height at which it rises into the water basin is determined by the diameter of the wearable water-resistant equipment and the buoyancy of the raft when it is tilted1.For example, a life raft with a capacity of about 10 people rides on a water basin of about 1 m. I can go up.

In addition, the launching guide fitting F attached to the wearable water resistant equipment,
By using the traction fitting G and the anchor shown in Figure 2, perform the following actions.

This enables stable launching of life rafts in strong winds and towing within drift ice areas. Furthermore, by utilizing towing fittings and anchors, the raft can be stabilized even in wind and waves.

■ In order to be able to launch a life raft stably in strong winds, before launching a life raft, a water-retentive Anger J, which is separate from the raft, is stretched over the sea using an anchor hanging rope K to drain seawater. If the anchor is pulled horizontally by the wind, a downward tension is applied to the anchor hanging rope K. Pass this anchor hanging rope through the launching guide fitting F attached to the water-resistant equipment, and then attach the life raft to the raft hanging rope E.
It will be suspended and launched into the water. As a result, even when launched in strong winds, the life raft is supported by two ropes, and the weight of the life raft and the downward tension of the anchor can
Stable launch becomes possible.

■ The towing equipment for towing the life raft consists of a towing metal fitting G and a wire H fixed to the bottom plate of the water-resistant equipment. By attaching a rope to the towing fitting and towing it, the life raft can be towed in drift ice or on an ice floe. In addition, by attaching the towing metal fittings to the wire fixed to the bottom plate, it is easy to climb up and retreat onto the ice floe by towing, as the towing rope serves as a guide when running on the ice floe.

■ Anchor J is attached to anchor hanging rope K via a detachable metal fitting. When using a life raft in wind and waves, after the raft lands on the water, remove the anchor from the anchor hanging rope at the removable fitting, and attach it to the raft's towing fitting G.
The stability of the raft can be further improved by attaching it to the

To, Example Figure 1 shows the attached ice protection equipment for life rafts.

The side plate is divided into eight parts, and can be attached even if the life raft is circular or polygonal such as hexagon. Is it not necessary to set the number of divisions of the side plate to a certain number depending on the size of the raft?1
Experiments have shown that good results were obtained for a raft with a capacity of about 0 people by dividing it into eight parts.

To attach water-resistant equipment to a life raft, use the raft hanging rope attachment tool installed near the hinge.

The rope was tied to the life raft's grab line attachment point, but it was sufficient.

The inward rotation of the side plate was restricted to be constant by a ratchet type stopper D. This is because when the side plate rotates excessively, experiments have shown that the side plate presses against the raft and the ability to climb up to the water basin deteriorates, which is an important requirement for the present invention.

By attaching towing fittings G and wires H to the bottom plate, the life raft could be towed in drift ice and on ice floes. When not being towed, the towing fitting was tied to the launching guide fitting F through the gap between the side plates and stored, but there was no problem.

In an emergency, a life raft should be deployed on board. 9. Once on board, the life raft should be suspended and launched. 1. Have experiments been carried out in launching in strong winds or using an anchor in combination to stabilize the raft in wind and waves? Is the performance sufficient? Obtained.

Figure 2 shows the anchor. The anchor has a detachable metal fitting, 9 weights M, and a simple water stop valve N. The anchor was attached to the anchor hanging rope K or the towing bracket G of the attached waterproof equipment and thrown into the sea, but it sank into the sea due to the double weight and seawater entered through the simple water stop valve, making it unable to function effectively as an anchor. Ta.

Also, if you accidentally drop your anchor overboard.

I attached a float P so that it would float on the sea. Retrieving the anchor was easy because the seawater inside the anchor was removed by pulling up the float P.

Figure 3 shows the law for loading life rafts using attached water-resistant equipment for life rafts.We considered dividing the side panels of the attached water-resistant equipment so that it can also serve as a container for storing inflatable life rafts. Therefore, I covered it with a waterproof sheet P and secured it with a nationally designated rope R, but it worked fine.

Figure 4 shows an example in which the water-resistant equipment for life rafts is attached to a completely enclosed boat rather than an inflatable life raft.A fully enclosed boat alone will not be able to get on the water smoothly if it is pressed by an ice floe. It may have been difficult to get up, but after installing the wearable water-resistant equipment, it was able to maintain the same water-resistance function as when attached to a life raft.

G. Effects of the invention According to the present invention, an inflatable life raft can be used as a life-saving equipment that can be used in cold sea areas such as the Arctic Ocean, where it could not be used conventionally, and an underwater life-saving system using the life raft can be constructed. It became possible.

In other words, if the life raft itself is improved in heat retention and the cold resistance of the air chamber fabric using known techniques, and the wearable water resistant equipment of the present invention is installed, it will not only be possible to apply it to the sea, but also be able to be used as is. It is a useful device that can be used in drift ice areas such as the Sea of Okhotsk if attached to a type of raft.

[Brief explanation of drawings]

Figure 1 shows the attached water-resistant equipment for life-saving rails. Figure 2 shows the anchor. Figure 3 shows the law for loading life rafts using water-resistant equipment attached to life rafts. Figure 4 shows an example of a lifeboat equipped with water-resistant equipment installed on a completely enclosed boat. Figure 2: Stowage of anchor life rafts is legal.

Claims (3)

[Claims] (1) It is used by being attached around the inflatable life raft.
A wearable ice-resistant equipment for a life raft characterized by a bottom plate and a side plate made of a rigid body, which are joined to the inside so that the side plate can rotate within a predetermined angle range. (2) The ice-resistant equipment for life rafts according to claim 1, which is equipped with a hanging rope for launching. (3) The ice-resistant equipment for a life raft according to claim 1, wherein the anchor is detachably attached as a separate piece.