JPH0428877Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a drain plug for boats, and particularly to a drain plug disposed on a transom plate of a small rubber boat.

(Prior Art) Recently, small boats or rubber boats have been widely used as recreational equipment, but seawater often accumulates inside the boat during use, so water is placed on the boat transom plate to drain the seawater inside the boat. A drain plug is often provided.
In this case, the drain plug is the transom hole itself, which is installed in the transom plate of a general motor boat and communicates the inside of the boat with the outside of the boat, and is connected to the transom hole from the inside or outside of the boat. It adopts a structure in which a rubber cap is fitted. However, in this case, when the cap is removed, the transom hole does not act as a drain plug, but on the contrary, water enters the boat through the hole, creating a completely unexpected problem. was.

In addition, rubber boats have been developed in which a drain plug with a non-return valve is fitted into the transom hole to prevent backflow of water, but the drainage efficiency is not that good and the initial purpose has not necessarily been achieved. It was something I didn't have.

In recent years, taking advantage of the simplicity of rubber boats, lifeboats made of rubber boats have been developed in the event of a shipwreck at sea. There was a desire to develop a drain plug for boats that met the requirements.

(Purpose of the invention) In view of this purpose, the present invention is a water drain plug for boats that efficiently drains water that has entered the boat in a short time.
Furthermore, the objective is to provide a drain plug that can drain water continuously even when the vehicle is running.

The present inventor proposed that a cylindrical body made of a flexible material sheet be fitted into the transom hole, which previously functioned as a drain plug, and that a good boat could be created by providing a drainage function and a check valve function to the cylindrical body. We thought that this could be achieved with a water drain plug, and in particular, by making part of the cylindrical body made of a flexible sheet into a flat shape, water could be prevented from flowing back into the boat, and it could be drained well even when the boat was running. He discovered this and completed the present invention.

(Structure) That is, the present invention is a drain plug for a boat that is disposed in a transom hole of a boat located above the water line when the boat is running, and includes a cylindrical body made of a flexible sheet, the cylindrical body One end is shaped to fit the transom hole that communicates with the inside of the boat, while the other part of the cylindrical body is formed in whole or in part into a flat shape that can be brought into close contact with the water pressure, and at least a part of the other part The folded portions on both sides are closely attached by sewing or gluing, and the length of the cylinder body is such that when installed in the transom hole, the flat portion is located below the water line when the boat is at rest. The present invention relates to a drain plug for a boat, characterized in that it has at least the following.

Examples of the flexible sheet used in the present invention include rubberized cloth, rubber sheet, synthetic resin sheet, etc., and any relatively flexible sheet can be used.

(Function) Since the drain plug of the present invention is made of a cylindrical body made of a flexible sheet, it can be easily deformed by external pressure (water pressure). One end of the cylindrical body has a shape that can be installed in the transom hole of a boat, while the other part has a flat shape in whole or in part, so when subjected to water pressure, etc., it comes into close contact and prevents internal circulation. I can do it. In addition, the cylinder body is
When it has a sufficient overall length and is disposed in the transom hole, the flat portion is always located below the water line when the boat is at rest.

Therefore, when this drain plug is installed in the transom hole of the boat located above the water line when the boat is running, the other part of the flat cylinder body extends outward. can be installed.

When the boat is stationary, the main drain valve, especially the flat part, is located below the waterline, regardless of whether the transom hole is located above or below the waterline, since the barrel has a sufficient length to accommodate the cylindrical body when the boat is stationary. Located under the water surface, the part is close to the water pressure, so it can effectively prevent external water from entering the drain plug and flowing back into the boat.

On the other hand, when the boat is running, the transom hole is located above the water line, and the flat part of the drain plug is opened due to the inertia of the water inside the boat, thus draining the water inside the boat to the transom hole. The water can then be continuously drained out of the boat through this drain valve.

Moreover, in the present invention, since the folded portions on both sides of at least part of the flat portion are closely attached by sewing or gluing, there is a void inside the folded portion that tends to occur when forming the flat portion. Without,
Therefore, backflow of water can be completely suppressed, and the flat shape can be maintained for a long period of time, thus providing the advantage of a long service life.

(Example) The present invention will be explained below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the drain plug of the present invention.

The drain plug 1 has a flexible sheet 2 as a cylindrical body, and one end 4 of the cylindrical body 3 has a shape that fits into a transom hole, and the other end 5 has a flat shape. It is taking shape.

In order to form the flat end portion 5 in this case, the cylindrical body 3 may be folded and both folded portions may be sewn or glued. By means of this sewn or adhesive portion 6, the cylinder naturally maintains its flat shape at its end 5.

The sectional views taken along the line A-A and B-B of the drain plug 1 shown in FIG. 1 are shown in FIGS. 2a and 2b, respectively.
Shown below.

As is clear from FIG. 2a, in the transom hole fitting portion 4 of the cylinder 3, the cylinder can maintain an opening shape that matches the shape of the transom hole because of its flexible sheet. On the other hand, at the other end 5 of the cylindrical body, as is clear from FIG. Therefore, this flat end portion has only a very small opening in its natural state, and the backflow of water from this portion is suppressed as much as possible.

Another embodiment of the drain plug of the present invention is shown in FIG. In this embodiment, the drain plug 1 is composed of a molded part 7 and a cylindrical body 3 made of a flexible sheet. The mold part 7 is made of, for example, rubber, has a shape that fits into the transom hole shape, and is provided with a flange 8 so that it can be easily adhered and fixed to the transom plate. One end of the cylinder 3 made of a flexible sheet is glued and fixed to the mold part 7, and the other end 5 is creased and sewn in the same manner as the drain plug shown in FIG. Alternatively, the upper and lower sheets are glued together, and the upper and lower sheets are almost in close contact with each other due to the adhesive portion 6.

In the drain plugs shown in FIGS. 1 and 3, the cylindrical body is creased at the flat end 5, and an adhesive part 6 is provided extending to the end of the cylindrical body, but the invention is not necessarily limited to this. First, if a flat portion is provided in a part of the cylinder, the effect of preventing water from returning can be ensured, and for example, the intermediate part 9 of the cylinder may be formed into a flat shape. Further, in order to ensure a flat shape, the adhesive portions may not be provided only at the folds of the cylindrical body, but point sewn portions or point adhesive portions 10 may be provided at the intermediate portions. Such a modification is shown in FIG.

Next, the effect when the drain plug of the present invention is installed in the boat transom hole will be explained.

FIG. 5 shows the transom plate portion when the boat 14 is at rest, with the drain plug having the molded portion shown in FIG. 3 disposed in the transom hole.

The mold part 7 of the drain plug 1 is fitted into the transom hole provided in the boat transom plate 11, and the transom hole 12 and the drain plug are bonded and fixed. Next, for reinforcement, another mold 13 is inserted from the inside of the drain plug 1 and firmly adhered, and the drain plug 1 is closed.
Complete the installation.

In this state, due to the weight of the boat 14,
When the ship is stopped, the drain plug 1 installed in the transom hole is located in the water below the water line, and the flexible sheet is completely attached to the flat end 5 due to water pressure (arrow in the figure). This completely prevents water from flowing back.

Figure 6 shows the state of water draining when the boat is running.

When running, the boat 14 slides on the water surface at a relatively high speed, so the water line is necessarily at the bottom of the boat, and the drain plug provided in the transom hole is located above the water surface. It turns out. The cylindrical body 3 of the drain plug is opened by the inertia of the water that has entered the boat, and water is continuously drained.

It is preferable to install the drain plug at the bottom of the transom board in order to drain water that has entered the boat as completely as possible.

(Effects) Furthermore, as mentioned above, the flat end of the drain plug of the present invention is brought into close contact with the water pressure when the boat is at rest, completely preventing water from flowing back into the boat.
If desired, it is also possible to provide means for lifting the flat end of the drain plug above the water surface when the boat is at rest, and for anchoring it to the boat body, for example by means of a rope.

As explained above, the drain plug of the present invention has a cylindrical body made of a flexible sheet with a part shaped into a flat shape, so that it functions as a flood prevention valve and can drain water extremely efficiently. It is. Furthermore, due to the close contact between the folds on both sides of the flat part, a complete water-proofing effect can be obtained, and the product has a very long service life.

Therefore, conventional drain valves have a structure in which a cap is attached to the transom hole, and if the cap is removed, water will flow back, but with the drain valve of the present invention, there is no cap at all. It can prevent backflow of water by using water pressure without the need for it, and has an especially excellent continuous drainage function.

In addition, in the case of conventional cap type caps, it was necessary to process the cap to match the round shape of the transom hole, but since the drain plug of the present invention is made of a flexible sheet, The shape of the hole is not limited to a round shape, and it has the advantage that it can be easily arranged even in a case where a transom hole is formed for high efficiency.

Furthermore, since any flexible sheet is sufficient, it can be said that the cost is greatly reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the drain plug of the present invention, Fig. 2 a and b are lines A-A and B-B in Fig. 1.
3 and 4 are perspective views showing another embodiment of the present invention, and FIGS. 5 and 6 are views of a boat in which the drainage line of the present invention is installed. They are partial sectional views, with FIG. 5 showing the state when the ship is stationary and FIG. 6 showing the state when the ship is traveling. 1... Drain plug, 2... Flexible sheet, 3...
Cylindrical body, 4... Cylindrical body end, 5... Flat shaped end, 11
...Transom board, 12...Transom hole.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A water drain plug for boats installed in a transom hole of a boat located above the water line when the boat is running, which is a cylindrical body made of a flexible sheet; One end of the cylindrical body is shaped to fit the transom hole communicating with the inside of the boat, while the other part of the cylindrical body is formed in whole or in part into a flat shape that can be brought into close contact with water pressure, and at least one The folded portions on both sides of the cylindrical body are closely attached by sewing or gluing, and when the cylindrical body is disposed in the transom hole, the flat portion may be located below the water line when the boat is at rest. A drain plug for a boat, characterized in that it has at least a length. (2) The drain plug for boats according to claim 1, wherein the flexible sheet is a rubberized cloth, a rubber sheet, or a synthetic resin sheet.