Ship

Abstract

It is an object of the present invention to reduce a restriction caused by a water depth of an area available for sailing. The ship has a hull part and is configured to be able to sail on water. The hull part has: a fuselage extending in the longitudinal direction of the hull part; a keel and a rudder arranged on the fuselage to receive water flow when the ship sails; a first posture switching mechanism for switching the postures of the keel and the rudder between a first posture and a second posture; and a first power source. The first posture is in the keel and the rudder respectively extending to the lower side of the fuselage. Compared with the first posture, the second posture is shorter in the length of the keel and the rudder when extending toward the lower side of the fuselage.

1 . A ship, which has a hull part and can sail on water, characterized in that
 the hull part includes:
 a fuselage extending in fore-and-aft direction of the hull part; 
 navigation members, which are arranged on the fuselage and receive water flow when the ship sails; and
 posture switching mechanisms for switching the postures of the navigation members between at least a first posture and a second posture; 
 
   wherein   the first posture is a posture in which the navigation members are extending toward the lower side of the fuselage;   the second posture is a posture in which the lengths of the navigation members extending toward the lower side of the fuselage are shorter than those in the first posture.   
     
     
         2 . The ship according to  claim 1 , wherein the navigation members are each in the shape of a long strip. 
     
     
         3 . The ship according to  claim 1 , wherein the posture switching mechanism switches the postures of the navigation members by pivoting the navigation members about axes each positioned at one end of a navigation member. 
     
     
         4 . The ship according to  claim 3 , wherein the posture switching mechanisms each include:
 power sources each for outputting a power for switching the postures of the navigation members;   worm gears interposed between the power sources and the navigation members;   wherein   a power output from a power source is transmitted to a navigation member via a worm gear, thereby pivoting a navigation member about an axis.   
     
     
         5 . The ship according to  claim 1 , wherein the second posture is a posture in which the navigation members are extending in the fore-and-aft direction of the hull part. 
     
     
         6 . The ship according to  claim 1 , wherein
 the fuselage has a groove portion on the lower surface thereof,   when the posture of a navigation member is the second posture, the navigation member is accommodated in the groove portion.   
     
     
         7 . The ship according to  claim 1 , wherein the posture switching mechanisms are arranged more inward than the outer wall of the fuselage. 
     
     
         8 . The ship according to  claim 1 , wherein the posture switching mechanisms are arranged above the waterline of the ship. 
     
     
         9 . The ship according to  claim 1 , wherein a navigation member is at least one of a keel and a rudder.