JPH0436906B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a surface effect ship (hereinafter abbreviated as SES).
and air cushion vehicles.
Vehicle) (hereinafter abbreviated as ACV).

[Conventional technology]

SES and ACV are both vessels that maintain the weight of the boat by generating air pressure on the underside of the boat, but seals that prevent air from leaking outside the boat are essential for these vehicles. It is a device. In addition to the above-mentioned purpose, this seal body has an important effect of alleviating the wave impact that the boat receives when sailing in waves.

Conventional technology regarding the seal body, which plays an important role as described above in this type of ship, will be explained below with reference to the drawings.

First, FIG. 1 shows a diagram to which the present invention is applied.
It is an explanatory diagram showing SES and ACV. SES1 is
It is a twin-hull type with a side hull 2, and has a guide hole 3 in the center for feeding air to float the boat, and a front part to prevent the air from escaping to the outside in the direction of the small arrow. Seal 4 and rear seal 5
A seal body consisting of is provided and moves in the direction of the large arrow.

On the other hand, the ACV 6 has a guide hole 8 in the center of the hull 7 through which air is introduced to float the boat.
Furthermore, a sealing body 9 for preventing the air from escaping to the outside in the direction of the small arrow is disposed around almost the entire circumference of the hull, and travels in the direction of the large arrow.

Among such seal bodies in SES and ACV, as an example, the front seal of SES is shown enlarged in FIG. 2. The flexible seal body 10 is attached to the hull at its front end. The boat has a mounting fixture 11, and is also provided with a string 12 near the rear end for hanging from the hull.

The conventional seal body had a structure as shown in FIGS. 3 and 3, respectively. In other words, basically, fiber-reinforced plastic (hereinafter referred to as
A typical example is shown in FIG. 3 and FIG. One is shown in Figure 3, in which a base material made of a laminated rubber elastomer 20 and a nylon base fabric 21 is coated with an FRP reinforcing material 22.
It is formed by sandwiching the rubber spacer 23 and the rubber spacer 23. In addition, as shown in FIG.
In all of the above examples, the rubber elastomer is vulcanized.

However, such conventional seal bodies have had the following problems. In other words, the seal body shown in Fig. 3 is made by laminating multiple different materials, so when the seal body is deformed by the application of large external forces due to waves during sailing, delamination often occurs between the layers, resulting in poor durability. In particular, the lower rear end of the seal body is constantly vibrating even when traveling in flat water, causing repeated fatigue of the seal body. This state is called flagellation, but a seal body formed by lamination from this flagellation is not suitable because delamination occurs. Furthermore, manufacturing such a multilayer laminate requires a large number of man-hours, which is economically disadvantageous.

In addition, in the case of the seal body shown in Fig. 3, the above-mentioned defects due to the lamination are reduced, but when manufacturing the seal body, a process of heating and vulcanizing the entire structure as one member is essential, which makes it difficult to manufacture. Not only was it difficult, but it also had drawbacks such as limitations on the size and dimensions of the seal body.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above-mentioned circumstances, and replaces the conventional sealing body mainly made of rubber elastomer with a sealing body made of a combination of thermoplastic elastomer and FRP, which solves the conventional problems. In particular, the object is to provide a sealing body that does not require delamination or vulcanization steps.

[Means for solving problems]

The thermoplastic elastomer used in the seal body according to the present invention is an excellent material that simultaneously has the properties of both rubber and plastic, and has the following features.

a Excellent mechanical properties. That is, it has high rebound resilience, little deformation in the low strain region, remarkable bending fatigue resistance, good wear resistance, and the like.

b It still has high mechanical strength even at low and high temperatures.

c Oil resistance, chemical resistance and aging resistance are significantly better than rubber elastomers.

Therefore, this thermoplastic elastomer can be used as SES and
When used as a main component of an ACV seal body, it can form a seal body that is far superior to conventional products in all operational environments.

In order to solve the problems, the present invention has developed an SES and
The main idea is the seal body for ACV.

The present invention will be described below based on embodiments with reference to the drawings.

〔Example〕

FIGS. 4 to 4 are explanatory diagrams showing cross sections of the seal body according to the present invention. First, in Fig. 4, a reinforcing material 31 is made of FRP in the shape of a round bar with a circular cross section, and the outside is made of a thermoplastic elastomer (polyester-based synthetic resin, trade name: Hytrel, manufactured by Toray Industries, Inc.). In addition, in FIG. 4, a flat plate-shaped FRP with a rectangular cross section is used as a reinforcing material 33, and this is used as a thermoplastic elastomer base material made of Hytrel as in the above example. 34. The thermoplastic elastomer on the outside is harder than synthetic rubber and slightly more flexible than semi-hard plastic, and can be covered by a continuous drawing process or coating process, and unlike synthetic rubber, does not require vulcanization. Unlike plastic sheets, etc., it has the advantage of being much stronger.

Furthermore, in the case shown in FIG. 4, an FRP reinforcing material 36 is placed on a base material 35 made of gelled thermoplastic elastomer in the form of a flat plate, and its upper surface is molded with a base material 37 made of thermoplastic elastomer. The one shown in FIG. 4 is a thermoplastic elastomer base material 38 made of thermoplastic elastomer that has been coated in advance along the shape of the reinforcing material 39 after molding is completed. It is formed by pasting or bonding an elastomer base material 40.

The seal body applies to the front and rear seals of the SES and all seals used on the bottom periphery of the ACV.

〔Effect of the invention〕

The present invention is based on the above structure, and unlike conventional rubber elastomers, thermoplastic elastomer is used as a base material for maintaining air pressure, and FRP, which has excellent rigidity, is combined with this as a reinforcing material. It is possible to provide a seal body that can be formed and maintains its shape well, and has an extremely excellent restoring force against external force from waves. In addition, it has the following advantages in terms of manufacturing and structure. That is, (a) Unlike those that use rubber-based illustrations,
In the step of arranging the reinforcing material, not only adhesion but also processing methods such as extrusion molding, coating molding, etc. can be employed, so manufacturing is easy and it is possible to freely manufacture a seal body of large size.

(b) By using thermoplastic elastomer,
There is no need for nylon base fabric, which was essential for reinforcement in conventional products, and mechanical strength equivalent to or higher than that of conventional products is ensured.

C. Since the base material is formed from a single material without using a base fabric, the problem of delamination that occurs in conventional seal bodies is eliminated, and in particular, it can sufficiently resist flange formation.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of SES and ACV to which the present invention is applied, FIG. 2 is an explanatory diagram of the front seal of SES, and FIG. 3 is a cross-sectional explanatory diagram showing the structure of a conventional seal body. FIGS. 4 to 4 are cross-sectional explanatory views showing the structure of the seal body according to the present invention. 1...SES, 2...Side hull, 3...Guiding hole,
4...Front seal, 5...Rear seal, 6...
ACV, 7...hull, 8...guiding hole, 9,10...
Seal body, 11... Attachment, 12... String body, 2
0, 24... Rubber elastomer, 21... Nylon base fabric, 22... Reinforcement material (FRP), 23... Rubber spacer, 31, 33, 36, 39... Reinforcement material (FRP), 32, 34, 35, 37, 40... Base material (thermoplastic elastomer).

Claims (1)

[Claims] 1. A seal body for SES and ACV made of thermoplastic elastomer with fiber-reinforced plastic embedded therein.