JPS6012275B2 - small vessel - Google Patents

Description

[Detailed description of the invention] "Purpose of invention" (Technical field of invention) TECHNICAL FIELD The present invention relates to a small boat.

(Conventional technology and its problems) Small vessels may be beached as needed, but in order for this beaching to be carried out smoothly, the bottom of the boat must have roundness at both bow and stern ends. is desirable.

This is because if both ends of the bottom of the boat are rounded, it will be easier to roll when going up to the beach, and there will be less resistance when dragging the boat on a sandy beach.

However, in the case of personal watercraft, the bottom of the boat generally has a rounded shape on the bow side, but not on the stern side.

That is, as the speed of a personal watercraft increases, dynamic buoyancy, or lifting force, is generated on the bottom of the boat to lift the hull and allow the watercraft to plan. In order to effectively generate this lift, an edge portion is formed at the stern end of the bottom of the ship.

This edge part separates the water flow along the bottom of the ship from the bottom to the rear, reducing the water reinforcement area of the hull, reducing resistance, increasing speed, and generating a large lift force on the bottom of the ship. Therefore, if the stern end of the bottom of a planing boat is rounded, it becomes difficult for the water flow to separate from the side end, increasing the area of bushy water, which increases resistance and reduces lift.

As a result, the necessary lift force for planing is not obtained, making it impossible to plan smoothly, and due to the lack of lift force, the stern does not rise and the trim angle increases, which affects the maneuverability of the ship, resulting in problems such as poor maneuverability. .

(Technical Problem to be Solved by the Invention) A technical problem to be solved by the present invention is to achieve both ease of beaching and smoothness.

"Structure of the invention" (Technical means for solving technical problems) The 8E technical means taken by the present invention to solve the above problems are as follows:
Both ends of a plurality of keels protruding across the bow and stern ends of the ship bottom are rounded, and a concave portion curved upward from the stern end of the ship bottom between the keels is provided. An edge portion is formed at the stern end of the bottom of the ship.

(Effect of technical means) According to the above means, "When beaching, the rollers should move along the roundness of the keel end against the bottom of the ship.
At the same time, during sailing, the water flow along the bottom of the ship between the keels is separated from the hull via the edge portion.

"Effects of the Invention" According to the configuration of the present invention as described above, the water flow along the bottom of the ship between the keels can be reliably separated from the edge portion during sailing, and sufficient lifting force can be generated on the bottom of the ship to ensure smooth sailing. In addition, since the edge portion is formed through a recess, the edge portion does not protrude from the keel, and when raising the beach, the roller can slide along the roundness of the keel end without hitting the edge portion. It can be easily hooked, and it is also easy to carry it up to the beach, and it is able to achieve both ease of going up to the beach and smoothness.

``Example'' Hereinafter, an example of the present invention will be described with reference to the drawings regarding a small boat made of fiber-reinforced plastic.

The drawings No. 1 to 2 show the first embodiment, and drawings from the back of the curtain to the drawings show the second embodiment. First, the first embodiment will be explained. In the figure, A is the hull, a is the bow, t is the bow, t is the 8 side of the stern, and c is the stern and the bottom of the ship.

The bottom of the bottom of the ship is made of sardines on both the left and right sides of the ship. A turtle' is formed protrudingly.

This keel extends from the bow end side of the bottom q to the stern c side end, and both ends thereof are rounded along the sailing direction. The bow a side end of the bottom is smoothly curved and continuous with the bow roar, and a keel dew extending between the two keel lines mentioned above is formed protruding from the end.

The keel is continuous from the keel stem part a and extends to the stern c side while curving along the nose of the ship's bottom a, and its end on the stern c side overlaps with the front keel arm' for a predetermined length.

The bottom a between the keel 98' is formed relatively lower than the bottom d on the outside of the keel 98', and constitutes a so-called sliding surface, and an edge portion 3 is formed at the end on the stern c side. ing.

This edge portion 3 is formed by providing a concave portion d that is gently curved upward from the stern side end to the bow a side in the bottom q between the keel wing and the tortoise. The transom c, which rises from the stern end of the bottom mother and constitutes the rear surface of the stern c, is divided into two discontinuous surfaces.

In the small boat of the first embodiment as described above, when the boat is beached, the rollers do not hit the edge portion 3 against the bottom d of the ship, but instead run along the roundness of the two ends of each keel 171'. It is. When this roller is moved from the bow side of the bottom d, the roller keels from keel 2 and transfers to 1'.
On the other hand, during sailing, the water flow along the bottom d between the keels 1 and 1' once flows upward to the front half of the concave portion d, then downwards at the rear half of the concave portion d, and separates horizontally backward from the edge portion 3. However, the water flow does not go around the transom or side, and the bottom of the boat works together to ensure smooth gliding.

In addition, in the above embodiment, the edge portion 3 is extended to the bottom tray on the outside of the keel 3.
The transom c. This makes it easier for the water flow along both keels and the tatami to separate from the bottom d of the ship.

Further, between the ship bottom 8 and the left and right ship sides P, there are formed chime turtles that extend outward from the ship bottom d, and the chime turtles 1
This prevents the water flow along the boat bottom d from moving toward the boat side b from the outer peripheral edge of the boat bottom a, but allows the water flow to easily separate from the boat bottom q toward the boat side b.

On the other hand, the above-mentioned hull is trassosum c, and both sides are left and right side b.
A protruding bean may be formed that protrudes in the direction of extension.
This also directs the water flow away from the bottom of the boat. The end of the shaft is thin, making it easy to grab and hold when raising the fish to the shore. Next, the second embodiment will be explained. In Figures 5 to 5, the light is also the hull of the ship, e is the bow, f is the ship's side, g is the stern, and h is the bottom of the ship.

The above-mentioned bottom h' is divided into the intermediate part h which makes up the running surface, and two enemy units on both sides rising from it in a stepped manner towards both sides of the ship and the passenger side. Korea′
are integrally formed in a protruding manner.

This keel groove base' extends over the center line of the bottom h on the bow e side, becomes a straight line, and continues to the bow e while curving smoothly. The end of the keel on the stern g side is curved in an arc from the end of the bottom h and continues to the stern g rear surface, that is, the upper green of the transom mother.

Again, in the middle part h of the bottom side of the ship, there is the above-mentioned keel 6, a keel that branches off from the eastern part of the bag of the heron and extends a predetermined length toward the stern g side.
are integrally formed in a protruding manner.

Therefore, the keel 6,
Since the keels 6' protrude and the ends of the keels 6, 6' on the bow e and stern g sides are rounded, they can easily hit the bottom h of the boat when beaching.

Edge portions 8 and 8' are formed at the intermediate portion h of the bottom of the ship and at the ends of the pair of joints 2 on the stern g side, respectively.

These edge portions 8, 8' are formed by providing upwardly curved and concave recesses 9, 9' at the boundary between the bottom h and the transom seal, respectively. It is divided into Edge portions 10, 10 are located at the upper edges of the recesses 9, 9', that is, at the boundary with the transom seal.
' is formed, and the recesses 9, 9' and the transom & are discontinuous by the edge portions 10, 10'.

In the small boat of the second embodiment as described above, when sailing, the water flow along the bottom h' of the boat moves away from each edge portion 8, 8' as the speed increases, and a large lift force is obtained on the bottom h of the boat. Lift up and glide.

Furthermore, since the recesses 9 and 9' are formed at the boundary between the bottom h and the transom 9, the boundary between the keels 6 and 6
'Since it does not protrude beyond the outer periphery, it is easy to catch rollers when beaching, and it is also concave inward, which reduces wave-making resistance when going backwards and improves backwards performance.

Note that the edge portion 8 requires a separate forming means, as manufacturing work to obtain an acute edge is troublesome in general FRP molding, and its construction is shown in FIG. 9.

First, after applying a mold release agent to the mold A, a gel coat resin is applied along the corners or edges of the mold A, and on top of that a glass mat impregnated with an unsaturated polyester resin, That is, the prepreg sheets are overlapped and a thin FRP layer C is laminated.

Next, a resin mortar is applied to the edge portion of this FRP layer C, and a thick prepreg sheet constituting the hull B is layered on top of it, and the FRP layer wood is laminated thereon.

Therefore, according to this forming means, the FRP constituting the hull B can be
When laminating the layered wood on the edge of the mold A, resin mortar is applied to that area in advance to form a gentle discontinuous surface, making it easy to stack the thick FRP layered wood. In addition, the edge portion 8 formed thereby can be reinforced.

This forming means is applied to other edge parts, such as the bottom side section pillows 2.
Of course, the present invention can also be applied to the edge portion 8' of.

Further, in the middle part h of the bottom of the ship constituting the above-mentioned sliding surface, the rear part is relatively lower than the front part with a rhinological difference 11 in the middle position.

However, since the lever step 11 is formed at the middle part h of the ship's bottom surrounded by the keels 6 and 6', a negative pressure is generated between it and the water flow, and this negative pressure presses the front part of the ship's bottom h against the water surface and trims the ship. It is possible to prevent the corners from increasing.

Furthermore, on both sides of the bottom h2, there is warpage toward the keels 6, 6' and the edge portion 8', respectively, in a predetermined range at the outside of the keel 6, 6' corresponding to the end on the stern g side, and at the corner of the edge portion 8'. It has a curved edge.

This curved portion 12 allows water to flow downward, that is, in a direction away from the bottom h of the ship, thereby supplementing the lifting force at the stern g side portion of the bottom h.

Furthermore, the curved portion 12 is attached to the outboard motor 13 in the center of the transom 9.
Since it is located on both sides of the outboard motor 13,
The water flow flowing downward from the curved portion 12 is connected to the outboard motor 13.
Since the horizontal water flow is directed to the outboard motor 13 through the middle part h of the bottom between the keels 6 and 6', the outboard motor 13 does not suffer from a decrease in its propulsion efficiency. In addition, WL in the figure
indicates the water surface during skiing. Brief explanation of drawings Figures 1 to 4
The figures show a first embodiment of the small boat of the present invention, in which the first figure is a side view, the second figure is a bottom view, the third is a front view, and the fourth is a rear view. FIG. 9 shows the second embodiment; FIG. 5 is a partially cutaway side view, FIG. 6 is a bottom view, FIG. 7 is a cross-sectional view along the W line of FIG. 5, and FIG. FIG. 9 is an enlarged sectional view of the extended portion of FIG. 5.

In the diagram, A, B...hull, a, e...bow, b, f...
...ship side, c, g... stern, d, h... bottom, 1, 1', 2, 6, 6', T... keel, 3, 8, 8
'...Edge portion, d,,9,9'...Concave portion. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. Both ends of a plurality of keels protruding from the bow side and the stern side end of the ship bottom are rounded, and a concave portion curved upward from the stern side end of the ship bottom between the keels is provided, and the ship bottom A small vessel with an edge formed at the stern end.