JP2006224735A - Obliquely slide-down lifeboat absorbing shock in landing on water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an obliquely slide-down lifeboat absorbing shock when landing on water, asuring safety of a passenger by absorbing shock when the lifeboat slides down from a main ship and lands on water. <P>SOLUTION: In order to enable the lifeboat 3 obliquely sliding downward from the main ship 1 while turning a bow portion 3a to a water surface W to prevent jumping-up of the bow portion 3a rushing into the water surface W, a pair of fins 4 projecting toward both sides is provided on the bow portion 3a. An attack angle when the fins 4 land on water is set to generate downward lift on the fins 4. A cross-sectional shape of a lower part of the bow portion 3a is linearly formed on both boat sides so as to decrease boat width toward a lower side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a buffered life-saving type lifeboat that is able to mitigate the impact of a lifeboat descending from the ship at an angle and landing.

In the free-fall lifeboat system, the lifeboat is locked on the top of a slidably mounted base on the ship so that it faces the water surface so that its bow is directed to the water surface. When the refuge boarded a lifeboat and evacuated, the lifeboat was able to land while descending diagonally along the slide.
However, if the ship becomes larger, the height of the above-mentioned lifeboat's equipment position from the surface of the water also increases, so the impact of the lifeboat descending and landing on the water increases, causing a danger to the passengers. There is.
JP 2001-63680 A

  It is an object of the present invention to provide a landing-type shock-absorbing lifeboat that is designed to make the safety of passengers safe by mitigating the impact of a lifeboat descending and landing on the ship. Let it be an issue.

  In order to solve the above-described problems, the landing-type shock-absorbing lifeboat of the present invention is a lifeboat that lands on the watercraft by sliding downward from the ship with the bow toward the surface of the water. In order to reduce the upward jumping of the boat's bow sometimes, fins are provided on both sides of the boat so that the angle of attack when landing on the fins is set to generate downward lift. It is characterized by that.

  In addition, the landing-type shock-absorbing lifeboat of the present invention is configured so that the cross-sectional shape of the lower part of the bow part decreases in the boat width as it goes downward, so that both sides of the boat are linear. It is characterized by being formed.

  In the above-described buffering lifeboat of the buffering type at the time of landing of the present invention, when a passenger and a crew member move from the ship and perform emergency evacuation, the lifeboat that slides diagonally downward with its bow toward the surface of the water, The neck collides with the surface of the water, and the reaction force tries to jump up the bow.However, the fin that protrudes from the bow from both sides sinks into the water and generates downward lift, so the bow of the boat jumps up. Will be diminished and will reduce the impact on the passenger.

  In addition, if the cross-sectional shape of the lower part of the bow part is formed in a straight line on both sides of the boat so as to decrease the boat width as it goes downward, the entry of the bow part into the water Compared to the case where there are flares on both sides of the boat's bow, it is carried out smoothly while mitigating the impact force without causing slamming, so the boat's bow is not struck against the water surface. The lifeboat descends to the water surface appropriately in combination with the action of the fins, so that the impact on the lifeboat occupant can be greatly reduced.

  In the landing-type buffer lifeboat of the present invention, when the lifeboat mounting position is 25 meters or more from the water surface as in the case of a super-large ship, as a means for further mitigating the impact at the time of landing. It is desirable to provide a parachute type wind resistor or a tilting wind resistor plate at the stern.

  FIG. 1 is a side view showing a state in which a shock-absorbing lifeboat of a buffered landing type as one embodiment of the present invention has a bow inserted into water, and FIG. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 3 is an explanatory view showing the action state of the fins in the lifeboat, and FIG. 4 is a perspective view of the stern part of a ship equipped with the lifeboat.

  As shown in FIG. 4, in the ship 1, the lifeboat 3 that is normally locked to the tilt guide 2 transfers the passenger of the ship 1 in the event of an emergency, and about 30 degrees toward the water surface W. It is equipped so that it can slide down and land at an inclination angle of.

  FIG. 1 shows the action state of the lifeboat 3 when landing, and the bow 3 a that enters the water surface W at an inclination angle of approximately 30 degrees when the lifeboat 3 lands jumps upward when landing. As shown in FIGS. 1 and 2, a pair of left and right fins 4, 4 projecting from both sides are provided on the bow 3 a.

And the elevation angle at the time of landing of each fin 4 is set so that the downward lift L may be produced, as shown in FIG.
In FIG. 3, D indicates drag and U indicates relative flow velocity.
Further, the lifeboat 3 is formed so that the cross-sectional shape of the lower portion of the bow portion 3a is linear at both sides of the boat so that the boat width decreases as it goes downward as shown in FIG. Has been.

  In the above-described buffering-type lifeboat of the landing type in this embodiment, when a passenger and a crew member move from the main boat 1 and perform an emergency evacuation, the lifeboat that glides downwardly toward the water surface W with the bow 3a facing the water surface W. No. 3 causes the bow 3a to collide with the water surface W and tries to jump up the bow by the reaction force. The fins 4 projecting from both sides of the bow 3a are submerged into the water, and the downward lifting force Since L is generated, the jumping of the bow 3a is reduced, and the impact on the occupant is mitigated.

  Moreover, since the cross-sectional shape of the lower part of the bow part 3a is linearly formed on both sides of the boat so as to reduce the boat width as it goes downward, the entry of the bow part 3a into the water is prevented. Compared with the case where there is a flare on both sides of the bow 3a, it is carried out smoothly while reducing the impact force without causing a slamming phenomenon, so that the bow 3a is not hit against the water surface. In this way, the lifeboat 3 descends to the water surface appropriately in combination with the action of the fins 4, and the effect of greatly reducing the impact on the passenger of the lifeboat 3 can be obtained.

  Even in the water chute installed along the pond in amusement parks, etc., fins that generate downward lift in the water are provided on both sides of the bow of the hull that is guided along the slope and enters the water surface. The impact force received from the water surface can be reduced.

It is a side view which shows the action state of the buffer type downfall lifeboat at the time of landing as one embodiment of the present invention. It is an AA arrow cross-sectional view of FIG. It is explanatory drawing which shows the action state of the fin in the said lifeboat. It is a stern part perspective view of the main ship which mounted the said lifeboat in the stern part.

Explanation of symbols

1 Vessel 2 Inclination guide 3 Lifeboat 3a Bow 4 Fin W Water surface D Drag L Lift U Relative flow velocity

Claims (2)

  In a lifeboat that slid down and slanted from the ship with its bow toward the surface of the water, it protruded on both sides of the boat's bow in order to reduce the upward jump of the boat's bow when the above-mentioned bow lands. A landing-type life-saving type lifeboat that is buffered at the time of landing, wherein the fin is provided so that the angle of attack at the time of landing of the fin is set to generate downward lift.     The landing buffer life-saving lifeboat according to claim 1, wherein the cross-sectional shape of the lower part of the bow part decreases in the boat width as it goes downwards, so that both sides of the boat are straight. A water-absorbing tilt-down lifeboat, characterized by being formed into a shape.

Images