JPH04372491A - Radder step device of small-sized vessel - Google Patents

Abstract

PURPOSE:To generate accommodation of a ladder step eventually left out of accommodating with the pressure of water stream due to vessel running and the force of a gas spring, and also maintain its accommodated state. CONSTITUTION:The body 40 of a ladder step extends downward from the stern of a small vessel, wherein the top is supported by a horizontal pivot shaft 90 stretching crosswise so that the bottom is rotatable between the position immerging underwater and the position held over the water surface. A gas spring 50 is furnished to act on links 53, 54 so that they rotate only in one direction, and in the sinking condition, the pressure due to this gas spring is applied in the direction of sinking while the water pressure due to vessel running is applied as a motive to lift the ladder step, and when it rotates a certain amount, the force due to gas spring 50 is applied as a rotational motive in the direction of lifting, wherein it is so arranged that this rotational motive will act even in the condition the rise has finished.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rudder step device for a small boat sailing on the sea with one or more passengers on board.

0002

2. Description of the Related Art Conventionally, small ships with engines have been widely used. This propulsion boat glides on the water at high speed and performs various exercises, but it can also be used by mooring offshore and playing in the water using the boat as a base.

0003

[Problem to be Solved by the Invention] In the above configuration, a ladder step is provided at the stern of the ship for convenience when people transfer from the water to the ship, and when the ladder step is installed, the lower end is submerged in the water. , and can be stored inside the ship when not in use. However, when a rudder step as described above is provided, it is troublesome to install the rudder step and store it inside the ship, and if the ship is sailing without storing it, the rudder step increases propulsion resistance. Moreover, there are problems in that waves are generated, causing spray and noise. In order to solve this problem, Japanese Patent Application Laid-Open No. 3-90493 discloses a system in which the rudder step is automatically retracted above the water surface by the water pressure caused by the ship's navigation and a rotational drive means for the rudder step. A device that does this has been proposed. However, with this structure, the ladder step is directly pressed by the gas spring, so the angle at which the ladder step can be rotated is small, and it is not possible to apply sufficient force to maintain the stowed state. There is a problem.

[0004] The present invention was made in order to eliminate such conventional drawbacks, and can reliably prevent the ladder step from being forgotten to be stored, thereby avoiding the various inconveniences mentioned above due to forgetting to store it. The object of the present invention is to provide a rudder step device for a small boat that does not cause the rudder step to rotate, has a large rotation angle, and can apply sufficient force to maintain the stowed state by means of a rotational drive means. be.

[0005]

[Means for Solving the Problems] The present invention is provided with a rudder step body that extends downward from the stern end and whose lower end is submerged in the water, and the rudder step body is provided with a rudder step body that extends downward from the stern end and whose lower end is submerged in water. The rudder step is supported by a fixed part of the hull and rotates between a state in which the lower end is submerged in water and a state in which it is located above the water surface, and the direction in which water pressure due to the movement of the ship causes the main body of the rudder step to rise. A rotary drive means for the ladder step body is coupled to the ladder step via a link mechanism, and this rotary drive means is configured to apply a pressing force only in one direction to the link mechanism. , this link mechanism includes a first link whose one end is attached to a fixed part of the hull so as to be rotatable around a horizontal axis, one end of which is connected to the other end of the first link by a shaft, and the other end of which is connected to the first link by a shaft. and a second link connected to the upper end of the rudder step main body, and when the rudder step main body is in a lowered state, the pressing force by the rotary drive means is applied in the downward direction of the step main body, and the pressure of water caused by the navigation of the ship is applied. When the ladder step main body is rotated beyond the dead center, the force by the rotational driving means acts as a rotational force in a direction to raise the ladder step, and the rotational force in this direction is configured to maintain the raised end state. It is something that

[0006] It is preferable that the rotation driving means is constituted by a gas spring, and the ladder step is configured to be rotatable by 180° or more. Further, the ladder step main body includes a central support and a plurality of upper and lower steps protruding from both sides thereof, and is configured such that a part of the stand drive is positioned between the steps when the stand drive swings. is preferred.

[0007]

[Function] With the above configuration, the rudder step can be extended with a single touch when in use, and even if you forget to put it away, the rudder step can be rotated by the pressure of the water flow as the ship sails, and the rudder step can be rotated by the rotary drive means. The rudder step is automatically rotated greatly to be stored on board the ship, and the rotary drive means maintains this stored state.

[0008]

[Embodiment] In FIGS. 1 to 4, a pair of left and right stand drives 6 are attached to the rear surface of the stern plate 20, and each of these stand drives 6 swings around an axis 60 in the vertical direction and turns simultaneously with the propulsion force. It also generates power.

A recess 22 is formed in the center of the upper surface 21 of the stern plate 20, and the recess 22 is used as a passage for people to board and disembark from the water. A rudder step device 4 is installed on the stern plate 20 below this recess 22. This rudder step device 4 is composed of a base plate 30 (fixed part of the hull) attached to the lower surface of the recess 22 and a rudder step body 40 rotatably held by the base plate 30. The ladder step main body 40 includes a central support 41,
A step 42 protruding from both sides at the lower end and middle part, and a handrail 43 provided at the upper part.
and a cap 410 attached to the top of the column 40. This handrail 43 is held at both ends by a first reinforcing member 44 projecting in a V-shape from the middle part of the post 41 and a second reinforcing member 45 projecting in a V-shape from the upper end of the post 41. There is. And the ladder step body 40 is
As will be described later, its upper end is rotatably supported via a horizontal and lateral pivot 90, and its lower end is underwater (below the water surface 98).
It is configured to rotate between a state where it is submerged in water and a state where it is located above the water surface 98 (above the recess 22).

Further, the base plate 30 is integrally formed with arms 31 extending downward and rearward on both sides thereof, and the base plate 30 is formed in a concave portion 22 of the hull.
It is fixed to the underside of the unit with bolts, etc. Also, recess 2
A base end portion of a gas spring 50 constituting a rotational drive means for the ladder step main body 40 is attached to the lower surface of the ladder step body 2 by a shaft 500. As shown in FIGS. 5 and 6, an L-shaped first end fitting 52 at the tip of the piston rod 51 of the gas spring 50 is connected via a shaft 91.
The center portions of the links 53 are connected. One end of this first link 53 is connected to the arm 31 of the board 30 via a shaft 92.
One end of a second link 54 is connected to the other end of the first link 53 via a shaft 93, and the other end of the second link 54 is connected to the second link 54 via a shaft 94. 2 is rotatably attached to the reinforcing member 45. Further, both ends of the second reinforcing member 45 extend further than both ends of the handrail 43, and the tip thereof is rotatably held at the rear end of the arm 31 by a pivot 90. The rotation drive means, link mechanism, etc. are provided symmetrically on both arms 31. The gas spring 50 is always subjected to an expansion force, and a pressing force F in the left direction in FIG. 5 is applied in the direction of the shaft 92.

In the above configuration, when the ship is anchored offshore and a person enters the water, the rudder step main body 40 is in the lowered state, as shown in FIGS. (98 below the water surface). In this state, the pressing force F by the gas spring 50 acts in the direction connecting the shaft 500 and the shaft 91, as shown in FIG.
00, a force is applied to rotate the first link 53 counterclockwise around the axis 92. This rotational force acts on the second reinforcing member 45 through the shaft 93, the second link 54, and the shaft 94 in a counterclockwise direction around the pivot 90, thereby causing the cap 410 at the upper end of the support column 41 to be attached to the substrate 30. The ladder step main body 40 is maintained in a lowered state by being press-fitted to the bottom surface of the ladder step main body 40. In this state, the underwater person 101 can put his or her feet on the step 42 and grab the handrail 43 to board the boat or enter the water from the boat, as shown in FIG.

When the ship is sailed after using the rudder step device 4, water pressure due to the sailing of the ship acts on the lower end of the rudder step main body 40, and this water pressure causes the rudder step main body 40 to move around the pivot 90. 2 and 5 in the clockwise direction. This rotation causes the shaft 94 to move to the left and connect the first link 53 to the shaft 92 via the second link 54 and shaft 93.
Rotate it clockwise. When the shaft 91 moves below the line 100 due to this rotation (beyond the dead center), the force F of the gas spring 50 moves the first link 53 to the shaft 91.
The rudder step main body 40 acts as a force to rotate the rudder step body 40 clockwise two times, as shown in the imaginary line in FIG. 2 and in FIG.
is raised above the recess 22. This rotation is 180 degrees in the example shown.
° or more, and even in the ascending state, the pressing force F by the gas spring 50 is applied to the shaft 91, the first link 53, the shaft 9
3. A clockwise rotational force is applied to the ladder step main body 40 via the second link 54 and the shaft 94, so that the ascending state can be stably maintained.

From the above-mentioned raised state, the ladder step body 40
To move the ladder step to the lowered state, the ladder step main body 40 may be grasped by hand and rotated around the pivot shaft 90 against the force of the gas spring 50 to bring it into the state shown in FIGS. 1 to 5. As a result, the force F of the gas spring 50 comes to act in the counterclockwise direction in FIG. 5 as described above, and the downward state is maintained. Note that, as the rotational drive means, various kinds of means other than the gas spring 50 can be used as long as they can apply a constant pressing force through the link as described above.

Furthermore, as shown in FIGS. 1 and 3, when the stand drive 6 is swung, even if its draining plate 62 approaches the direction of the ladder step device 4, the ladder step main body 40 does not close to the upper or lower steps. There is no other member between the steps 42 except for the central support 41, and since there is a space between the steps 42 even inside the side line 49, there is no interference with the ladder step main body 40.

[0015]

[Effects of the Invention] As explained above, according to the present invention, even if the rudder step is forgotten to be stored after use, the rudder step is rotated by the pressure of the water flow as the ship sails, and the rudder step is automatically rotated by the rotation drive means. The rudder step is rotated and stowed, and the rudder step can be rotated at a large angle and stowed on board using the rotational drive means, and the rotational force of the rotational drive acts even after stowing to maintain the stowed state. The action to be taken will be fulfilled.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a stern section showing an embodiment of the present invention.

FIG. 2 is a side view of the ladder step device.

FIG. 3 is a rear view of FIG. 2;

FIG. 4 is an enlarged perspective view of the ladder step device.

FIG. 5 is an enlarged side view of the rotation mechanism section of the ladder step device.

FIG. 6 is a side view of FIG. 5 after rotation;

[Explanation of symbols]

4 Ladder step device 6 Stand Live 20 Transom 30 Board 31 Arm 40 Ladder step body 41 Post 42 steps 43 Handrail 50 Gas spring 53 1st link 54 Second link 90 Axis 91-94 axis

Claims (3)

[Claims] Claim 1: A rudder step body is provided which extends downward from the stern end and whose lower end is submerged in water, and the rudder step body is supported at its upper end by a hull fixing part via a horizontal and transverse pivot. The lower end is configured to rotate between a state where it is submerged in water and a state where it is located on the water surface, and is configured so that water pressure due to the navigation of the ship acts in a direction to raise the rudder step body, A rotary drive means for the ladder step main body is coupled to the ladder step via a link mechanism, and this rotary drive means is configured to apply a pressing force only in one direction to the link mechanism, and this link mechanism has one end. A first link is rotatably attached to a fixed part of the hull around a horizontal axis, one end is connected to the other end of the first link by a shaft, and the other end is connected to the upper end of the rudder step body. and a second link, in which the pressing force by the rotary drive means is applied in the downward direction of the step body when the ladder step body is in a descending state;
When the rudder step main body is rotated past the dead center due to the water pressure caused by the ship's navigation, the force from the rotation drive means acts as a rotational force in the direction of raising the rudder step, and the rotational force in this direction increases. A rudder step device for a small vessel, characterized in that it is configured to maintain a finished state. 2. The rudder step device for a small boat according to claim 1, wherein the rotation driving means is composed of a gas spring, and the rudder step is configured to be rotatable by 180 degrees or more. 3. The ladder step main body includes a central pillar and a plurality of upper and lower steps protruding from both sides thereof, and a part of the stand drive is positioned between the steps by swinging of the stand drive. 3. The rudder step device for a small boat according to claim 1, wherein the rudder step device is configured as follows.