JPH0320238Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a rubber boat for rowing.

<Prior art> In a conventional rubber rowing boat, the main body of the rubber boat is constructed by forming the air cylinder into an annular air bag shape using rubber-coated cloth, and attaching the bottom surface between the lower surfaces of the air cylinder. , a removable bottom plate is provided above the bottom surface, and the bottom surface is formed in a substantially flat shape.

When using a rubber boat configured in this way,
When attempting to propel this rubber boat by rowing with oars, it is difficult to determine the direction in which the boat will travel in a straight line due to the flat bottom surface, and it takes considerable effort to propel the boat in the desired direction. It required

<Technical problem of the invention> The technical problem to be solved by this invention is to maintain the original ease of folding of a rubber boat while changing the shape of the bottom of the boat into a shape that makes it easy to determine the direction when traveling in a straight line. It is to make it.

<Means for solving the technical problem> The technical means taken by the present invention to solve the above problem is a rowing rubber boat in which a bottom plate is detachably attached to the upper side of the bottom of the rubber boat body.
An air keel that is expandable and deflated and formed into an appropriate shape with an appropriate width is placed between the bottom surface and the bottom plate approximately along the center line of the bottom surface in the propulsion direction, and fixing bands are wrapped around the air keel at multiple locations. , the end of the band is removably fixed to the bottom of the ship using a velvet fastener.

<Function> When air is introduced into the air keel, the air keel expands downward as its upward movement is suppressed by the lower surface of the bottom plate. Due to the expansion of the air keel, the bottom surface of the flexible rubber boat main body is pulled downward, and a portion of the bottom surface approximately on the center line in the propulsion direction protrudes downward.

By removing the air from the air keel, the air keel contracts and becomes more flexible and flat.
The rubber boat body returns to its original shape with a flat bottom.

Furthermore, bands that can be attached and detached using velvet fasteners are wrapped around multiple locations of the air keel, and are fixed and positioned relative to the bottom of the ship.
The air keel can be removed by unfastening the band.

The air keel is attached between the bottom of the rubber boat body and the bottom plate when in use, and removed when not needed.

When in use, the bottom plate is attached to the top of the bottom of the rubber boat body, positioned above the air keel, and removed when not needed.

<Effects of the invention> Since the invention is constructed as described above, by inflating the air keel with air, the bottom of the rubber boat is pulled downward, and the center line of the bottom in the propulsion direction is moved downward. A keel portion that contributes to the stability of the rubber boat in straight running and the rigidity of the bottom of the rubber boat can be formed at this portion. In addition, the air keel can be positioned and fixed with a removable band using a velvet fastener, and the band can be folded freely.
When storing, the bottom plate is removed and the air is removed from the air keel and the rubber boat itself, allowing for easy folding without having to remove both. Therefore, while maintaining the ease of folding as a rubber boat, it is possible to make it easier to determine the direction when traveling straight, and to improve the rigidity of the bottom part.

In addition, the air keel's removable mounting structure allows you to replace the air keel with another one if it becomes damaged and becomes unusable by removing the band. By attaching an air keel between the bottom surface and the bottom plate of a rubber rowing boat, it is possible to improve the directionality and the rigidity of the bottom part of the boat in a straight line without hindering the ease of folding.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

The rubber rowing boat A of this embodiment has a bottom plate 2 removably attached to the upper side of the bottom 1 of the rubber boat body a, and an air keel 3 that can be expanded and contracted detachably attached between the bottom 1 and the bottom plate 2. It is composed of

The rubber boat body a has a gas cylinder 5 that can be expanded and contracted formed into an annular shape of an appropriate shape using rubber-coated cloth, synthetic resin leather, etc., and the bottom surface 1 is integrally formed between the lower surfaces of the gas cylinder 5. A bottom plate 2 is detachably attached to the upper side of the bottom surface 1.

The bottom plate 2 is made of a material of appropriate hardness such as plywood, aluminum, or synthetic resin, and has the shape of the bottom surface 1 of the rubber boat body a. The air keel 3 is held in a wedge-shaped gap 6 by being tightened inward by the surrounding air cylinder 5, and is placed at an appropriate position on the center line 4 in the boat's propulsion direction to inject air into the air keel 3 below. The operation hole 2a is opened.

The air keel 3 is made of the same material as the rubber boat body a and is expandable and deflated, and is formed into an elongated shape with an appropriate width.
It is attached between the bottom surface 1 and the bottom plate 2, substantially along the center line 4 of the bottom surface 1 in the propulsion direction, and in a state that it can be freely attached to and removed from the bottom surface 1. The length of the air keel 3 is appropriately set in consideration of the shape of the main body a, for example, about 80% of the total length of the rubber boat main body a.

The shape of the air keel 3 may be any shape that suppresses upward expansion, such as a substantially cylindrical shape when filled with air, and that easily expands downward and protrudes when air is filled. As shown in Fig. 2, both ends may be tapered over an appropriate length and tapered toward the tip, or they may be formed in a straight line over an appropriate length on both ends as shown in Figure 2. It is more preferable to form it in a tapered shape so that it becomes appropriately narrower toward the top of the tip from the lower surface on the central side.

An air inlet 3a for injecting air into the air keel 3 and conversely removing the air is provided at an appropriate position on the upper surface side of the air keel 3, and this air inlet 3a is connected to the bottom plate 2. It is attached in a state that matches the position of the operation hole 2a.

The air keel 3 can be detachably attached to the bottom surface 1 by attaching, for example, an operating band 7 with a velvet fastener 7 attached to the tip as shown in the figure.
A may be wound around appropriate locations on the air keel 3, for example, 2 to 3 locations, so that it can be positioned and fixed.

The operating band 7a has its base end fixed to the bottom surface 1,
An engaging part 7 that is wrapped around the upper surface side of the air keel 3 and passed to the opposite side, and that corresponds to the engaging part 7b at the tip of the operating band 7a that is fixed to the bottom surface 1.
c to fix the position of the air keel 3, and by pulling up the operating band 7a, both the engagement parts 7b,
By releasing the engagement of 7c, the air keel 3 can be removed from the bottom surface 1. In this case, the length of the operating band 7a and the mounting positions of both ends of the band 7a are appropriately set so that the air keel 3 can be sufficiently expanded downward.

In the case of attachment using this velvet fastener, one of the fastening portions 7b formed to an appropriate size
is fixed to the lower end face of the air keel 3, and the other engaging part 7c corresponding to this engaging part 7b is fixed to the bottom surface 1.
Air keel 3
The air keel 3 can be detachably attached to the bottom surface 1 by only pressing the bottom surface 1 and pulling the air keel upward.

When air is injected into the air inlet 3a of the air keel 3 from the operation hole 2a of the rubber rowing boat A constructed as described above, the air keel 3
expands downward from the flat state shown in FIG. 3, as shown in FIG. 1 is pulled downward, and a substantially center line portion 4 in the propulsion direction on the bottom surface 1 protrudes downward, and a keel portion b that contributes to the stability of the rubber boat in straight running and the rigidity of the bottom of the rubber boat is formed at this portion. It becomes like this. This keel b makes it easier to determine the direction of the rubber boat when traveling in a straight line, and improves the rigidity of the bottom of the rubber boat, but both ends of the air keel 3 are tapered toward the tip. (See Fig. 1) It has a tapered shape that becomes narrower from the lower part of the middle toward the upper part of the tip.

(See FIG. 2) Therefore, the shape of the keel portion b is also deformed into a shape corresponding to this, thereby making it easier to more effectively determine the directionality in straight running.

In the above embodiment, when it is not necessary such as when storing, the bottom plate 2 is removed and the air in the air cylinder 5 and the air keel 3 of the rubber boat body a is removed, or the air in the air cylinder 5 is removed and the bottom plate 2 is removed and the air keel 3 is removed. By removing the air, etc., the rubber boat body a can be brought into a freely deflated and foldable state without any problems with the air keel 3 attached, and furthermore, when it is stored or when the air keel 3 is replaced with another new one, etc. If necessary, the air keel 3 can be easily removed by releasing the operating band 7a of the velvet fastener 7.

Note that the air keel 3 of the present invention can be attached to a conventional rowing rubber boat, in which case an operating hole is opened in the bottom plate corresponding to the position of the air inlet 3a of the air keel 3. All you have to do is do something like that.

[Brief explanation of drawings]

1 to 4 show a rubber rowing boat according to the present invention, in which FIG. 1 is a partially cutaway plan view, FIG. 2 is a sectional view taken along the center line in the propulsion direction of FIG. 1, and FIG.
The figure is a cross-sectional view in the width direction showing a state before air is injected into the air keel, and FIG. 4 is a cross-sectional view in the width direction showing a state in which air is injected into the air keel from the state shown in FIG. In the figure, A: rubber boat for rowing, a: rubber boat body, 1: bottom surface, 2: bottom plate, 3: air keel, 4: center line in propulsion direction, 7: velvet type fastener, 7a: operating band.

Claims (1)

[Scope of utility model registration request] In a rowing rubber boat in which a bottom plate is removably attached to the upper side of the bottom of the rubber boat body, an air keel which can be expanded and contracted between the bottom and the bottom plate, and which is formed into an appropriate shape with an appropriate width, is located approximately at the center line of the bottom in the propulsion direction. 1. A rowing rubber boat, characterized in that a fixing band is wrapped around the air keel at a plurality of locations along the air keel, and the end of the band is detachably attached to the bottom of the boat using a velvet fastener.