JPS5919678Y2 - Inflatable liferaft drop device - Google Patents

Description

[Detailed description of the invention] This invention relates to a dropping device for an inflatable liferaft installed on a large ship.

Inflatable liferafts have been recognized for their superiority as lifesaving facilities on ships, and have come to be equipped on all types of ships.

These inflatable liferafts are fitted with high-pressure gas cylinders (usually liquefied carbon dioxide, nitrogen, air, etc.) and are normally folded and stored in a reinforced plastic 2-part container, which is then carried on the ship's exposed deck. The most common way is to place it on a drop platform installed on the side of the ship.

To explain this type of conventional dropping device, in Fig. 1, 1 is an underframe, 2 is a column of the underframe 1, 3 is an inclined rail,
Reference numeral 4 denotes an extension rail rotatably attached to the tip of the inclined rail 3 with a pin, and each of the above rails is made of rope material and consists of a pair of left-right symmetrical underframes 1 that are integrated together with connecting materials by methods such as welding or bolting. It is formed as.

5 is a container, 6 is an automatic release device attached to the underframe 1, and 7 is extended between the extension rail 4 and the automatic release device 6, and the container 5 is raised at approximately right angles to the pillar 2 and the inclined rail 3. This is a lashing measure in which the underframe 1 is held in place between the extended rails 4 held on top of the underframe 1.

The automatic release device 6 is capable of separating from the lashing cable 7 either manually or by being submerged in water and subjected to a certain water pressure.

8 is an eye attached to the underframe 1, 9 is a gasket fitted into a hole drilled in the container 5, and 10 is a moving cable for the raft vitality device that passes through the gasket 9, and its base is connected to the eye 8. There is.

11 similarly penetrates the packing 9, and one end is attached to the handling caution plate 1.
This is an auxiliary bowline rope that extends close to 2, and its role will be explained later.

When an automatic release device 6 is manually operated when a marine accident occurs, the lashing rope 7 is separated from the release device 6, and the container 5 slides on the inclined rail 3 while pushing down the extension rail 4 and falls toward the sea surface.

During the raft's fall, the operating rope 10 is tensed and the air filling device is activated to start inflating the raft, and the container 5 is pushed open in two and completely inflated at the sea surface.

In addition, if the ship sinks suddenly and the automatic release device 6 cannot be operated, the automatic release device 6 releases the lashing lines 7 due to the water pressure at a certain water depth after the ship sinks, and the container 5 automatically moves toward the sea surface. surface.

FIG. 2 is a diagram showing the mutual relationship between a raft dropped by the conventional dropping device shown in FIG. A bowline rope connected through a safety rope 15, 1
6 is a connecting rope between the containers 5, and the above-mentioned bowline rope 14 is
After the raft is dropped from the ship, it is used to tie the raft 13 to the ship to prevent it from being washed away from the ship, and the safety rope 15 is used to secure the raft 13 to the ship in case the ship sinks. It is designed to prevent the raft 13 from being pulled into the water along with the ship, and is designed to break when tension above a certain value is applied.

In this way, conventional inflatable liferafts have 14 ropes.
The life raft was connected to the ship by a safety rope 15 and a working rope 10, but the safety rope 15 was severed due to the lack of length of the bowline 14 or the shock at the time of dropping, and the life raft was washed away. was there.

As a measure to prevent the inflatable liferaft from spilling out, Marine Survey No. 27-1 and Marine Survey No. 40, dated February 14, 1978,
With this, a notification was issued by the Director-General of the Shipping Bureau of the Ministry of Transport, making it mandatory to install auxiliary bowline ropes from March 1, 1978.

The reference numeral 11 in Fig. 1 is this auxiliary bowline rope,
As shown in Fig. 2, the life raft 13 and the ship are connected by directly tying the auxiliary bowline 11 to the bowline 14.
Safety rope 15 - working rope 10 - ship side, and bowline rope 14
= There are now two systems, one for the auxiliary bowline 11 and one for the ship, but in consideration of the possibility of the ship sinking during normal loading, the auxiliary bowline 11 is left free, and when dropping, the crew can attach the auxiliary bowline to a part of the ship. 11 is secured, the automatic release device 6 is activated, and the container 5 is dropped.

As a result, even if the safety rope 15 breaks, the life raft 13 is connected to the ship by the bowline 14 and the auxiliary bowline 11.

However, in the event of a ship sinking, if the ship and the liferaft are connected, the liferaft will be pulled into the sea as well as the ship, so the auxiliary bowline 11 is left free during normal loading. .

If the number of life rafts loaded is small, it may be possible to escape in time even if the crew lashes them as described above, but on large ships such as those currently in use, lashing takes time because the number of loaded life rafts is large. In some cases, it may be impossible to escape.

Another drawback was that it was possible for the life raft to be washed away by forgetting to tie it down and dropping it.

This design links the automatic release device and the auxiliary bowline, so that during manual dropping, the auxiliary bowline is tied to the automatic release device, and when the ship sinks, the auxiliary bowline is tied to the automatic release device. It is characterized by a structure in which the rope is free.

An embodiment of this invention will be described below.

FIG. 3 is a rear perspective view of the inflatable raft dropping device according to this invention, and this invention is characterized by adding a feature to the automatic release device 6 shown in FIG.

FIG. 4 is a front view of this automatic detachment device, and FIG. 5 is a sectional view taken along the line -■ in FIG.

In FIGS. 4 and 5, 21 is a pressurized chamber having a seawater inlet 22, 23 is a sealed chamber, 24 is a diaphragm that partitions the pressurized chamber 21 and the sealed chamber 23, and 25 is fixed to the diaphragm 24 at one end. A detachment shaft whose other end protrudes outside the pressurizing chamber 21, 26 a spring that urges the diaphragm 24 in the direction in which the detachable shaft 25 protrudes, and 27 a mounting plate integrally fixed to the pressurizing chamber 21 by, for example, welding. It is attached to the underframe 1 in FIG. 3 with bolts 28.

29 is a detachment control space formed in this mounting plate 27; 30
．． 31 is a first and second intermediate piece that is rotatably attached to the mounting plate in this space and engaged with each other; 32 is a locking pin fixed to the mounting plate 27; and 33 is this locking pin 3.
2 and the trigger engaged with the second intermediate piece 31, to which the lashing cable 7 shown in FIG. 3 is connected, whereby the trigger 33 receives an upward tensile force in FIG. However, the trigger 33 is normally connected to the second intermediate piece 31.
The second intermediate piece engages with the first intermediate piece 30, and further (
Although the first intermediate piece is engaged with the detachment shaft 25, movement of the trigger 33 is prevented, but these are no different from the conventional configuration.

41 is a second plate fixed to the mounting plate 27 at a predetermined interval.
The mounting plate 42 is a pressurizing device for optional operation attached to the second mounting plate 41, and is equipped with a pressurizing chamber 44 partitioned by a diaphragm 43, and this pressurizing chamber can be controlled remotely. It is connected to a pressure source.

Reference numeral 45 denotes an operating shaft fixed to the diaphragm 43 during arbitrary operation, and although it is separate from the detachment shaft 25, it is constructed so that the movement of the operating shaft 45 is transmitted to the detachment shaft 25.

Reference numeral 46 denotes a push button shaft that penetrates the pressurizing chamber 44 and projects to the outside, and its inner end abuts the operating shaft 45.

Reference numeral 47 denotes a handling display plate fixed to the second mounting plate 41 and covering the push button shaft 46, and is made of a material such as plastic that can be destroyed by a predetermined external force.

Reference numeral 48 denotes an auxiliary bowline fixture that is inserted into the space between the mounting plate 27 and the second mounting plate 41, and engaged with the detachment shaft 25 by penetrating the protruding end of the detachment shaft 25; The free ends of the bowline rope 11 are connected.

In the above configuration, when manually dropping, the handling display board 47
When the push button shaft 46 is strongly pressed by hand, force is transmitted to the diaphragm 43 and the actuating shaft 45 is pushed.

The force is further transmitted to the conventional automatic detachment device, and as the detachment shaft 25 moves, the intermediate piece 30.31 rotates, the trigger 33 is released, and the container 5, which has been secured by the securing teeth 7, is released. Dropped.

The auxiliary bowline rope 11 is tied to the auxiliary bowline fixing device 48, but because the detachment shaft 25 and the operating shaft 45 move together, it will not come off, and even if the external force on the push button shaft 46 is removed, the spring 26 causes the detachment shaft 25 to return, so the auxiliary bowline rope does not come off.

In the case of a remote simultaneous drop, the diaphragm 43 is displaced by the pressure from the actuation source and the actuation shaft 45 is moved, but the other movements are exactly the same as above, and the auxiliary bowline line is not prevented from coming off. The same is true.

Next, when the ship sinks, water pressure is applied to the pressurizing chamber 21 of the conventional automatic detachment device, and the water pressure causes the detachment shaft 25
moves to the closed chamber 23 side.

As a result, the intermediate piece 30.3L) rigger 33 comes off and the container 5 floats up, but at this time, the arbitrary operation actuating shaft 45 does not receive any external force and therefore does not move, so only the detachment shaft 25 moves, and this movement causes the auxiliary The net fixing device 48 comes off and separates from the ship.

In the above embodiment, the manual release by the crew was explained, but by attaching an air supply pipe to the pressurizing chamber 44, it is possible to operate multiple automatic release devices simultaneously, and it is also possible to use a diaphragm 43 or the like. First, even if the force of the spring is used, the same effect as in the above embodiment can be obtained.

As described above, according to this invention, there is no need to tie the auxiliary bowline to the ship, and by making it possible to lash the auxiliary bowline and drop the liferaft with just one motion, the amount of work for the crew can be reduced. This has the effect of eliminating forgetting to tie down the auxiliary bowline rope and shortening the time required to drop and escape.

[Brief explanation of drawings]

Figure 1 is a rear perspective view of a conventional inflatable liferaft dropping device, Figure 2 is a diagram showing the mutual relationship between the raft dropped by this dropping device and the dropping platform, and Figure 3 is the dropping device of this invention. FIG. 4 is a front view of the automatic release device used in this invention, and FIG. 5 is a sectional view taken along the line V--■ in FIG. 4. In the drawings, the same reference numerals indicate the same or equivalent parts, 1 is the underframe,
5 is a container, 6 is an automatic release device, 10 is an operating rope, 11 is an auxiliary bowline, 13 is a hut, 25 is a release shaft, 42 is a pressurizing device for arbitrary operation, 45 is an operating shaft for arbitrary operation, 48 is This is an auxiliary moyashi net fixing device.

Claims (1)

[Scope of utility model registration request] a detachment shaft that is mounted under a biasing force by a spring member and is movable in the axial direction against the biasing force manually or hydraulically;
and a trigger, which is normally locked by the breakaway shaft and released when the breakaway shaft moves in the axial direction, consisting of a tonnage to which the lashing line is tied, which is inflated by water pressure or manual operation during submergence. an automatic release device for releasing the liferaft from the lashing device; and a pressure device for optional operation attached to the automatic release device, the pressure device for optional operation causing the release of the automatic release device. An auxiliary bowline fixing device that is engaged with the tip of the shaft and becomes uncoupled when the breakaway shaft moves in the axial direction; and an auxiliary bowline fixing device that is butted against the tip end surface of the breakaway shaft in the same direction as the direction of the deflection force that the breakaway shaft receives. and a separate operating shaft to which a spring member applies a deflecting force, and when the operating shaft is pressed against the deflecting force, it pushes the abutted detachment shaft and moves to replace the detachment shaft. an inflatable life raft, wherein the auxiliary bowl rope fixing device is engaged with the auxiliary bowl rope fixing device, and the auxiliary bowl rope fixing device is released when only the detachment shaft is moved by water pressure against a deflection force. Dropping device.