JPS63145167A - Buffer system side wall type air cushion cruiser - Google Patents

Abstract

PURPOSE:To improve the cruising feeling by installing a softening member in the upper part of the air cushion part of an air cushion cruiser and preventing the generation of the air column vibration in the air cushion part, thus reducing the vertical movement of the hull. CONSTITUTION:A membrane 5 made of expandable rubber, etc. is applied in separated form downwardly from the bottom surface 1b of a hull 1, along the bottom surface 1b, in the upper part of an air cushion part 4. The membrane 5 dividingly forms an air chamber 4 for buffer in airtight form together with a front edge suspension part 2a and a rear edge suspension part 3a between the bottom surface 1b of the hull 1. Though, in the air cushion part 4, the air pressure between the membrane 5 and a water level 6 tends to sharply increase, the membrane 5 is elastically curved upwardly, and said elastic deformation and the softening action by the air chamber 4a in the upper side is generated, and the direct transmission of the variation of the air pressure to the ship bottom is prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sidewall type air cushion boat, and features:
ri+1:/, Nenran Episode 14 flashes back to the shock-absorbing sidewall type air-cushion boat that was built by ALM.

[Conventional technology]

Sidewall type air cushion boats that have been put into practical use are
Since it is easy to cause agitation due to the influence of waves, a means has been developed to control the pressure in the e-chamber, which is used to float the ship, using hydraulically driven louvers and 7T side vanes.

[Problem that the invention seeks to solve]

However, in sidewall type air cushion boats lacking conventional pressure control means as described above, the vibration of the air column in the boat has a much shorter period (less than 1 hertz) than the vibration of the hull due to waves. If the ship's vertical movement occurs, there is a point "X" where it is impossible to cope with this and the ride quality deteriorates.

The present invention aims to solve these problems, and by providing a buffer means on the upper part of the air cushion part, it is possible to prevent the occurrence of air column vibration in the air cushion part, and to improve the ship's hull. An object of the present invention is to provide a shock-absorbing side wall type air cushion section which is capable of reducing vertical movement of the vehicle and improving riding comfort.

[Means for solving problems]

For this reason, the buffer type III wall type air cushy boat of the present invention is provided with downwardly protruding side walls on both sides of the hull, as well as visible front and rear seals at the front and rear ends of the hull, respectively. In the side wall type air cushion part formed with an air cushion part surrounded by the bottom face of the hull, the side wall, and the front seal and the rear seal, the bottom face of the hull is attached to the top of the air cushion part. It is characterized by having a stretchable membrane stretched downward and spaced apart from the bottom surface along the same line, and a buffer air chamber airtightly formed between it and the bottom surface of the hull by this membrane. It is said that

[For production]

In the above-mentioned buffer type side wall type air cushion section of the present invention, when the air pressure between the membrane and the water surface in the air tank 7252 section is about to rise rapidly, the membrane elastically stretches and bends upward. Elastic deformation and a buffering effect by the upper air chamber are performed, and in this way, the above-mentioned fluctuations in air pressure are prevented from being directly transmitted to the bottom of the ship, and short-period air vibrations in the air cushion section are reduced. become.

〔Example〕

Hereinafter, a buffer type side wall type air cushion portion as an embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is a longitudinal sectional view thereof, and Fig. F52 is a transverse sectional view thereof.

Similarly to the conventional case, the shock-absorbing side wall type air cushion section of this embodiment is provided with side walls 1a projecting downward on both sides of the hull 1, and at the front end hanging portion 2a and the rear end hanging portion 3a of the hull 1. An air cushion section 4 is formed which is surrounded by the bottom surface 1b and each side q1a of the hull 1 and the front and rear seals 2 and 3, each having a flexible front and rear seals 2 and 3, respectively.

Then, the air taken in by the not-shown seat fan is supplied to the air cushion section 4 through an air supply duct (not shown) that opens at the top of the hull.
The ship is floated, and the ship is propelled by a propeller (not shown).

In the shock-absorbing sidewall type air cushion boat of the present invention, the upper part of the boat BS4 is made of elastic rubber or the like, which is stretched along the bottom surface 1b of the hull at a distance downward from the bottom surface 1b. This membrane 5, together with the front end hanging part 2a and the rear end hanging part 3a of the hull 1, partitions and forms an airtight buffer air chamber 4m between it and the bottom surface 1b of the hull 1.

The pressure of the air sealed inside the air chamber 4a is set to be slightly lower than the pressure of the air supplied to the lower part of the air tank 1 for floating the hull 1.

With the above configuration, in the air cushion part 4, the membrane 5
When the air pressure between 6 and the water surface 6 is about to rise dramatically,
The membrane 5 is elastically bent upwards, and the impact action is performed, and in this way, the fluctuations in air pressure are directly applied to the bottom of the ship. In addition to being prevented from being transmitted, short-period air vibrations in the air cushion portion 4 are also reduced.

In this way, air cushion? The vertical movement of the hull due to the vibration of the air inside the IS4 is reduced, and the ride comfort as an air cushion boat is greatly improved.

〔Effect of the invention〕

As described in detail above, according to the buffer type side wall type air cushion section of the present invention, a membrane is provided on the upper part of the air cushion section, and is stretched along the bottom surface of the hull so as to be spaced downward from the bottom surface. This membrane has a simple structure in which a buffer air chamber is airtightly formed between the bottom surface of the hull and the short-period air column vibration that tends to occur in the air cushion part of the side wall type air cushion part. This reduces vertical movement of the hull, contributing to improved ride comfort.

[Brief explanation of the drawing]

Fig. 1.2 shows a buffer type side wall type air cushion watercraft as an embodiment of the present invention, Fig. PlfJ1 is a longitudinal cross-sectional view thereof, and Fig. 2 is a cross-sectional view thereof. 1. Hull, 1a. Side wall, 1b. Bottom of hull, 2.
・Front seal, 2a... Forward end hanging part of the hull, 3... Rear seal, 3a... Rear end hanging part of the hull, 4... Air cushion part, 4a... Buffer air chamber, 5... Membrane, 6. Water surface. Sub-Agent Patent Attorney Yoshihiko Iinuma No. 1 (21

Claims (1)

[Claims] Each side of the hull is provided with a side wall projecting downward, and a front end and a rear end of the hull are provided with a flexible front seal and a rear seal, respectively, so that the bottom surface of the hull, the side wall, and the front end of the hull are provided with flexible front and rear seals, respectively. In a sidewall type air cushion boat having an air cushion portion surrounded by a seal and a rear seal, an elastic member is provided on the top of the air cushion portion along the bottom surface of the hull, extending downwardly from the bottom surface. 1. A buffer type sidewall type air cushion boat, characterized in that a buffer air chamber is provided between the bottom surface of the hull and the bottom surface of the hull.