JP2980453B2 - Airboat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air boat in which a main body made of an air-tight and water-tight sheet such as a rubber cloth is fixed to an outer periphery of a rigid bottom of an FRP frame structure.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for airboats having a rigid bottom, such as composite boats or RIB boats (Rigidlnflatablc Boats), and various airboats have been provided.

Conventionally, this type of airboat is constructed by fixing a main body cylinder of a substantially U-shaped bag made of rubber-coated cloth to the outer periphery of a rigid bottom of a frame structure made of FRP, and fixing the main body cylinder to the rigid bottom. For example, a method has been adopted in which a gas cylinder is bonded to a ship bottom using rubber glue.

However, recently, this type of airboat has been increasing in size year by year, and its transportation has become a major problem. For this reason, there is a demand for an airboat capable of transporting the airframe and the bottom separately.

[0005] To meet this demand, there is an airboat of the type in which a lower portion of a cylinder and a hard ship bottom are connected by bolts as disclosed in Japanese Patent Application Laid-Open No. 61-160385, for example.

In Japanese Patent Application Laid-Open No. 2-63691, a main body cylinder is fixed to an abutting surface on the outer periphery of a rigid ship bottom at two upper and lower positions, and a lower fixing structure is formed by rising from the outer surface of the cylinder. In addition, an insert face material having an enlarged portion at the tip is formed on the main body cylinder, and two opposing locking portions are formed in a recess formed on the contact surface of the hard ship bottom over substantially the entire outer periphery of the hard ship bottom. A groove into which the rising portion of the plug-in surface material enters is formed between the two locking portions, and the plug-in surface material is inserted into the groove between the locking portions over the outer periphery of the ship bottom, and is inserted into the main body cylinder. There is disclosed an air boat in which the enlarged portion of the insertion surface material is locked to the locking portion by air filling.

[0007]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the structure disclosed in Japanese Patent Publication No. 0385, a large number of bolts must be attached and detached when the cylinder and the ship bottom are attached and detached, so that it is extremely troublesome and the attachment and detachment between the cylinder and the ship bottom is not easy.

[0008] In the above-mentioned Japanese Unexamined Patent Publication No. 2-63691, a face member mounted on a cylinder is inserted into a groove formed in a contact surface of a ship bottom, and is drawn from a front side to a rear side of the ship bottom.
Since the structure is such that the cylinder is fixed to the bottom of the ship by filling the air with the cylinder, the labor can be saved as compared with the structure in which a large number of bolts are attached and detached. Since it is a long member that covers almost the entire length of each port, it is necessary to slide this long face material over the entire length of the long locking part in order to attach and detach the cylinder and the ship bottom, which requires considerable labor and time. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional airboat, and an object of the present invention is to provide an airboat having a structure in which a cylinder can be easily attached to and detached from a bottom of a ship in a short time. It is assumed that.

[0010]

According to the present invention, there is provided an air boat in which a main body cylinder is fixed to an abutting surface on an outer periphery of a hard bottom, and the air boat rises from an outer surface of the cylinder. A plurality of slide members having a rising portion and an enlarged diameter portion formed at the tip of the rising portion are provided at intervals below the air cylinder, and the slide members are accommodated on the outer peripheral contact surface of the rigid bottom of the ship. A plurality of locking portions having a groove with a width larger than the thickness of the rising portion of the slide member and smaller than the diameter of the enlarged diameter portion are formed at a part of the recess, The slide member is provided at a position corresponding to each of the plurality of slide members, and the slide member is locked to the enlarged diameter portion by filling with air while being positioned in the corresponding locking portion of the slide member. I do.

The lengths of the slide members need not always be constant, and are determined appropriately according to the required fixing strength of the cylinder, etc., but a large water pressure is applied during traveling of the air boat, and the main body cylinder is firmly fixed. Near the stern that needs to be
It is desirable to lengthen the slide member.

The slide member may be flexible or non-flexible.

When the slide member is inflexible, it cannot be bent when inserted between the locking portions provided on the outer peripheral abutting surface of the hard ship bottom. The spacing must be at least as large as the length of the corresponding slide member, but if the slide member is flexible, it is sufficient to insert the slide member into the groove of the locking portion. If so, the interval between adjacent locking portions may be shorter than the length of the corresponding slide member. In particular, when it is necessary to firmly fix the air cylinder to the hard ship bottom, it is desirable that the distance between the locking portions be as short as possible.

[0014]

According to the present invention, when a plurality of slide members are slid into the corresponding locking portions on the bottom of the ship, the lower portion of the main body cylinder is slid to the rigid bottom by sliding the slide members by the length of each slide member. It is possible to remove the main body cylinder from the rigid ship bottom by sliding the main body cylinder from the rigid ship bottom by sliding it by the length of the slide member. In addition, the main body can be attached and detached in a short time.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 9 show one embodiment of the present invention.
As shown in FIG. 3, the air boat of this embodiment has a substantially U-shaped main body cylinder 1 made of a rubberized cloth fixed to the outer periphery of a rigid bottom 2 made of an FRP frame structure.
In addition, the airboat according to the present invention is not limited to the one in which the substantially U-shaped air cylinder is fixed to the hard bottom 2, as shown in FIG. 11.
The two cylinders may be fixed to the rigid ship bottom.

As shown in FIG. 4, the hard bottom 2 is provided with concave portions 3, 3 on both the left and right sides and the bow of the bottom, and has a lower fixing structure described later therein.

As shown in FIG. 2, the main body cylinder 1 is fixed to a spherical contact surface 6 on the outer periphery of the rigid ship bottom 2 by upper and lower fixing structures 4 and 5.

The upper fixing structure 4, as shown in FIG.
One end is adhered to the main body cylinder 1 and the connecting cloth 7 with eyelets extending from the main body cylinder 1 is connected to a hook 8 attached to the inner surface of the bottom of the ship with a rope 9. In the figure, reference numeral 11 denotes a reinforcing cloth for reinforcing the bonding of the connection cloth 7.

The lower fixing structure comprises a plurality of slide members 13 arranged at intervals on each side of the cylinder, a concave portion 3 formed on the outer peripheral contact surface of the ship bottom, and one of the concave portions. And a plurality of locking portions 12 provided in the portion.

As shown in FIG. 5, a stepped concave portion 3 is formed under the contact surface 6 over substantially the entire length of the outer periphery of the rigid bottom of the ship, and a part of the concave portion 3 is provided with two elongated metal plates at intervals. The plates 14, 14 are screwed with the metal plates 14, 14.
A plurality of locking portions 12 are formed by opposing and fixing each other so that a groove 16 is formed therebetween.
The length of the metal plate 14 of each locking portion 12 is
Of the same length as each other, and the adjacent locking portions 1
The interval between the two is formed so as to be substantially equal to that of the slide member 13. Reference numeral 17 denotes a receiving member for the screw 15.
In order to prevent water from entering the inside of the ship bottom,
The inner space 18 is closed.

A slide member 13 is adhered to the main body cylinder 1 at an appropriate interval so as to rise from the outer surface of the cylinder. As shown in FIG. 6, the sliding member 13 is bonded to a rubber cloth 19 so as to wrap the hard round rubber 20. Further, the fibrous tape 2 is attached to the free end side.
1 and a bonding part 22 for bonding to the trunk,
It is a plate-shaped member extending in the axial direction of the cylinder, which is composed of a rising portion 23 that follows and an enlarged diameter portion 24 at the tip.

It goes without saying that the shape of the enlarged diameter portion of the slide member is not limited to a circular shape, but may be any shape as long as it can be locked by the locking portion as shown in FIG.

The slide member of this embodiment is of a flexible type in which hard round rubber is wrapped with a rubber cloth and bonded together. However, it is not possible to wrap a rod-shaped metal with a rubber cloth. It may be flexible.

The width t of the groove 16 of the locking portion 12 is larger than the thickness a (FIG. 6) of the rising portion 23 of the slide member 13 and smaller than the diameter b (FIG. 6) of the enlarged diameter portion 24. Stipulated. The length 1 of the rising portion 23 (FIG. 6)
Is preferably designed to be equal to or slightly shorter than the distance p from the contact surface 6 to the cylinder 1 to the locking portion 12.

In the fixing structure of this embodiment, each of the slide members 13 has a rising portion 23 corresponding to the corresponding locking portion 1.
2 and the enlarged diameter portion 24 is located in the locking portion 12.
It is inserted so as to be located in the inner space 18. By filling the main body cylinder 1 with air, a pulling force as shown by an arrow A in FIG. 5 acts on the slide member 13, and the expanded portion 24 of the slide member 13 is strongly engaged with the locking portion 12 by this force. By being stopped, the main body cylinder 1 is firmly fixed to the contact surface 6 of the ship bottom 2.

It is preferable that the bow portion has a fixing structure including the slide member 13 and the locking portion 12 as in this embodiment, since the cylinder is more firmly fixed. Depending on the size, purpose of use, etc., the fixing structure of the bow portion may be only the upper fixing structure.

The upper fixing structure 4 is different from the structure shown in FIG.
As shown in FIG. 9, a fixing cloth 26 of a rubberized cloth whose one end is adhered to the cylinder 1 may be fixed to the top surface of the boat bottom 2 with screws 27 via a non-corrosive metal plate 28.

Although the concave portion 3 is formed over almost the entire length of the outer periphery of the hard ship bottom, the shape of the concave portion is not limited to this.
For example, a plurality of recesses may be provided intermittently by partitioning the slide member 13 into a length that can be slid until the slide member 13 is inserted and locked by the locking portion.

Next, the operation of attaching the main body cylinder 1 to the hard bottom 2 in the above embodiment will be described.

First, the slide member 13 is inserted into the locking portion 12 at the bow, and the center is firmly aligned. Thereafter, as shown in FIG. 1, both sides of the cylinder 1 are lowered in the direction of arrow C, and each slide member 13 is inserted into the concave portion 3 adjacent to the corresponding locking portion 12 on the bottom 2 of the ship. Arrow D
, The rear end of each side of the cylinder 1 is evenly pulled backward, and the rising portion 23 of the slide member 13 is fixed in the groove 16 of the locking portion 12.

Next, air is charged into the main body cylinder 1. At this time, the amount of air to be charged into the main body cylinder 1 is 80% of that at the time of complete filling.
If it is set to about, the upper fixing work is easy to do. Also,
The air may be filled after the upper fixing operation is completed.

After the lower side is fixed by the lower fixing structure in this way, the connection cloth 7 with eyelets in the upper fixing structure 4 is fixed.
Is fixed to the bottom 2 of the ship by tying it to the hook 8 with a rope 9 and then completely filled with air. At this time, due to the internal pressure of the cylinder 1, a pulling force indicated by an arrow A (FIG. 5) acts on the slide member 13 to draw the slide member 13 substantially toward the center of the cylinder 1, and this force causes the slide member 13 to expand. The diameter portion 24 is strongly locked by the locking portion 12, and the main body cylinder 1 is firmly fixed to the contact surface of the ship bottom 2.

When the air cylinder 1 is to be removed from the bottom 2 of the ship, the air is evacuated, and the connecting cloth 7 with the eyelet fixed to the upper fixed structure and the rope 9 that has been fastened are removed. Release the fixed structure. Thereafter, the cylinder 1 is pulled from the boat bottom 2 by pulling the cylinder 1 forward and pulling out each slide member 13 from the corresponding locking portion 12.

FIG. 7 shows another embodiment of the present invention. In the air port of this embodiment, the FRP frame 2 is formed simultaneously with the formation of the ship bottom 2 without using the metal plate 14 or the like in the lower fixed structure 5.
5 are integrally formed, and a substantially U-shaped member is attached from the back surface thereof to form the concave portion 3 and the closed space 18. Then, the slide member 13 is inserted into the groove 16 between the locking portions, and the cylinder 1 is fixed to the contact surface 6 of the ship bottom 2.

FIG. 10 shows still another embodiment of the present invention. In this embodiment, the metal plate 14 constituting each locking portion 12 is provided only on one side in the concave portion 3, and the locking portion 12 is formed by the metal plate 14 on one side and the shoulder portion 30 of the concave portion. The groove 16 of the locking portion 12 is formed between the tip of the metal plate 14 and the shoulder 30. The other structure and the operation of this embodiment are the same as those of the embodiment shown in FIGS.

In this embodiment, since the locking portion 12 is formed by disposing the metal plate 14 only on one side of the concave portion 3, the lower fixing structure can be simplified, and the manufacturing cost can be reduced. Can be reduced.

[0037]

As described above, according to the present invention, when the main body cylinder is attached to and detached from the ship bottom, a plurality of slide members provided on the main body cylinder are provided on the ship bottom side. The cylinder can be attached to and detached from the bottom of the boat simply by sliding the stopper approximately the length of the slide member. Can be performed extremely easily and in a short time as compared with a conventional airboat.

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing one embodiment of an airboat of the present invention.

FIG. 2 is a sectional view showing a fixing structure of a main body cylinder and a rigid ship bottom in the embodiment.

FIG. 3 is a plan view showing the air boat of the embodiment.

FIG. 4 is a plan view showing a hard bottom of the airboat of FIG. 3;

5 is an enlarged cross-sectional view showing a fixing structure of a main body cylinder and a lower part of a rigid bottom of the ship shown in FIG. 2, and is a view taken along line II of FIG. 3;

FIG. 6 is a sectional view showing a slide member used in the fixing structure of FIG. 5;

FIG. 7 is a sectional view showing a fixing structure of a main body cylinder and a rigid ship bottom according to another embodiment of the present invention.

FIG. 8 is an enlarged cross-sectional view showing an example of a fixing structure above a main body cylinder and a rigid ship bottom.

FIG. 9 is an enlarged cross-sectional view showing another example of the fixing structure above the main body cylinder and the rigid ship bottom.

FIG. 10 is a sectional view showing a fixing structure of a main body cylinder and a rigid ship bottom in still another embodiment of the present invention.

FIG. 11 is a plan view showing another example of an airboat to which the present invention is applied.

FIG. 12 is a sectional view showing another shape of the slide member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body cylinder 2 Hard ship bottom 3, 3 recessed part 4 Upper fixing structure 5 Lower fixing structure 6 Abutment surface 7 Connecting cloth with eyelets 8 Hook 9 Rope 12 Locking part 13 Slide member 16 Groove 23 Standing part 24 Enlarged part 26 Fixing cloth

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-63991 (JP, A) JP-A-61-202996 (JP, A) JP-A-61-160385 (JP, A) 191593 (JP, U) JP-A 62-26291 (JP, U) JP-A-3-32589 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B63B 7/08

Claims (3)

(57) [Claims] An air boat in which a main body cylinder is fixed to an abutting surface on an outer periphery of a hard ship bottom, a rising portion rising from an outer surface of the cylinder, and a diameter increasing portion formed at a tip of the rising portion. A plurality of slide members having a gap are provided at the lower part of the cylinder at intervals, and a concave portion capable of accommodating the slide member is formed on the outer peripheral contact surface of the hard bottom, and a part of the concave portion has the concave portion. A plurality of locking portions having grooves having a width larger than the thickness of the rising portion of the slide member and smaller than the diameter of the enlarged diameter portion are provided at positions corresponding to the plurality of slide members at intervals, and the slide is provided. An air boat wherein the slide member is locked to the enlarged diameter portion by filling the air with the slide member being positioned in a corresponding locking portion of the member. 2. The air boat according to claim 1, wherein the slide member provided on the main body cylinder is flexible. 3. The sliding member provided on the main body cylinder is inflexible, and the interval between the locking portions provided on the outer peripheral contact surface of the hard ship bottom is equal to the length of the corresponding sliding member. The airboat according to claim 1, which is equal to or more than the same.