JP3325950B2 - Seat structure for small ships - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat structure having excellent waterproofness and cushioning properties used for small boats and the like.

[0002]

2. Description of the Related Art Conventionally, in a small boat such as a jet propulsion boat gliding on water, a sheet is used in which a plastic foam is used as a core material (cushion material) and its periphery is covered with an outer skin. It is often wet by splashes and rain during running. And the cushion material of the seat, in order to demonstrate good cushioning properties,
Although the air is discharged by receiving the compressive force and is constituted by the open-cell foam so that the air is sucked in at the time of restoration, water is also sucked when the air is sucked. In order to prevent this, for example,
Japanese Patent No. 24799 proposes a structure in which a cushion material is sealed with a skin and an air bag is connected, and air discharged by a compressive force is sent into the air bag so that external air is not sucked. ing.

[0003]

In the structure where the waterproofing means is not provided, when the cushion material is wet and the weight is applied at the time of use or a load is applied to the cushion material by the impact of waves, There is a problem that the water containing water comes out of the outer skin from the seam or the like and contaminates the clothes of the user. Further, when the cushion material contains water, there is a problem that the weight increases and a bad smell is generated.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional drawback. The present invention provides a seat body with good cushioning properties, and at the same time, water containing water is quickly discharged to generate an odor. It is an object of the present invention to provide a seat structure for a small boat or the like that does not cause a problem.

[0005]

According to the present invention, a cushioning core material is covered with a bottom plate and an outer skin to form a sheet, and the core material is formed of a single layer of plastic foam, The bottom plate has holes formed at positions corresponding to the recesses, and an opening is formed on the upper surface of a sheet table on which the sheet is placed. A container is fitted into the opening, the seat is placed on the upper surface of the seat table via a cushion material around the opening, and the cushion material is arranged so as not to overlap with the hole in the bottom plate. Is what it is.

Preferably, the plurality of crests have different heights.

[0007]

In the above construction, the core material covered by the bottom plate and the outer skin is constituted by a single layer of plastic foam, and the core material is formed with a plurality of crests having openings on the lower surface. Therefore, even in the water or in an atmosphere where water is struck, the compressive force from above due to the weight of the person on the sheet is repeatedly applied to the sheet body, so that the absorbed water is discharged well through the recess. Therefore, problems such as generation of offensive odor, increase in weight, and deterioration of the core material do not occur. Further, since the core material occupying the majority of the sheet is formed of a plastic foam, it acts as a buoyant body, and the cushioning properties of the sheet can be adjusted by adjusting the size and distribution of the concave portions.

[0008]

1 and 2, a hull member 11 constituting a bottom plate and a deck member 12 constituting a deck are integrally formed by FRP or the like.
The hull 1 is constituted by being joined together at 3. Hull 1
An engine (not shown) and a water jet propulsion device (to be described later) driven by the engine are installed in the inside, thereby sucking water from the bottom of the ship and injecting water in a predetermined direction from the nozzle 73 at the stern end. Propulsion and turning forces are generated.

On the deck, a deck member 12 rises above the center line of the hull 1 behind the center portion to form a seat base 6, and both sides of the seat base 6 are recessed to form a foot deck 4. The outside is further raised to form a gunnel 5. The sheet 3 is placed on the sheet table 6, and the sheet 3 is installed on the sheet table 6 with a support table 62 interposed therebetween in the rear half of the sheet 3. An opening is formed on the upper surface of the seat base 6, and a storage case 63 is fitted and attached from above, and a cover 64 is placed on the upper surface of the storage case 63 to cover the opening, and the seat 3 is placed thereon. Are placed via the cushion material 65.
An operation handle 2 installed on a handle base 60 is provided on the front side of the seat body 3 so that a person sitting on the seat 3 can place his feet on the foot deck 4 and hold the operation handle 2 to drive.

The sheet 3 is configured as shown in FIG. That is, the sheet 3 has a core material made of a material rich in cushioning properties covered with a bottom plate 30 and a waterproof outer cover 35, and the core material is composed of a main core material lower layer 31, a main core material intermediate layer 32, and a main core material. It comprises a main core composed of an upper layer 33, and a sub-core arranged so as to cover the upper surface and both side surfaces of the main core. The main core material is formed of a closed-cell foam of plastic such as polyethylene or vinyl chloride, and the sub-core material 34 is a material having more cushioning properties than the main core material, for example, open-celled soft plastic foam such as polyester fiber or urethane foam. It is made of wood. The outer cover 35 is formed of a waterproof sheet such as a vinyl sheet.

As described above, the main core material is composed of a plurality of layers of the main core material lower layer 31, the main core material intermediate layer 32, and the main core material upper layer 33, and each layer has holes 310, 320 penetrating vertically. And the concave portion 331 that opens downward is almost uniformly arranged and formed on the entire surface, and the holes 310 and 320 of each layer, the concave portion 331 and the hole 300 of the bottom plate 30 communicate with each other up and down. A plurality of concave portions 301 are formed so as to be substantially uniformly arranged over the entire surface.

The softness of the cushion changes depending on the ratio of the total area of the holes to the total area of the seat.
The size and distribution density of these holes may be appropriately set according to the required softness of the cushion and the original hardness of the main core material. The horizontal sectional shape of the hole may be freely selected, such as a circle or a square. The reason why the main core material has a multi-layer structure is that a cushioning property can be exerted by utilizing the displacement between the layers, and the layers can be used as drainage passages.

FIG. 4 shows another example of the sheet 3. In the upper layer 33 of the main core, a hole 330 penetrating vertically is formed. The hole 330 is formed by the hole 320 of the intermediate layer 32 of the main core and the lower layer of the main core. A plurality of recesses 302 that open downward and communicate with the holes 310 of the upper and lower portions 31 are formed substantially uniformly over the entire surface, and the other points are the same as those in FIG. Thus, the hole 330 may be formed in the main core 33 instead of the recess 331.

FIG. 5 shows still another example of the sheet 3. The main core 36 is formed of a single layer, and the main core 36 is provided with a plurality of recesses 360 that open downward and are evenly distributed. The recess 360 is vertically communicated with the hole 300 of the bottom plate 30 to form a recess 303 in the same manner as described above. As is clear from FIG. 5, the plurality of recesses 360 are crests 360 with closed tops, and adjacent recesses 360 have different heights. 5, the sheet 3 shown in FIG. 5 has an opening formed on the upper surface of the sheet table 6 on which the sheet 3 is placed, and a storage case 63 is fitted into the opening from above and attached thereto. The sheet 3 is
The cushion member 65 is placed on the upper surface of the seat base 6 via the cushion member 65 around the opening, and the cushion member 65 is attached to the bottom plate 3.
It is arranged so as not to overlap with the hole 300 of 0.

FIGS. 6 and 7 show the water jet propulsion device.
It is configured as shown in FIG. That is, the water jet propulsion device 7 is installed in a recess in the housing 18 having a cross section formed in an inverted U-shape at the rear bottom of the hull. A tapered portion 72 is formed at the stern of the main body 70, and a water injection port 73 that swings around a vertical shaft 730 is formed at the rear. A cylindrical rotating body 74 having a plurality of blades 78 helically arranged on the inner peripheral surface is attached to the middle part of the main body 70, and a gear 740 is integrated with the outer peripheral surface on one side of the cylindrical rotating body 74. Is formed. A motor 8 is mounted on the housing 18 above the cylindrical rotating body 74 by bolts 19, and a pinion 82 to which a rotational force is transmitted via a speed reducer 81 meshes with the gear 740, whereby the cylindrical rotating body 74 is rotated. Is rotated, and water is sucked from the water introduction port 75 through the flow path 71 by the blades 78 on the inner peripheral surface. Note that instead of forming a plurality of blades 78 as shown in FIG.
9 may be formed on the inner peripheral surface of the cylindrical rotating body 74. In the above configuration, since the impeller shaft located at the center of the flow path is not provided, there is no problem that algae and the like are entangled with the impeller shaft.

In the configuration shown in FIGS. 1 to 3, a person sits on the seat body 3, places his / her feet on the foot deck 4, and grips the operation handle 2 to drive the hull 1. At this time, a compressive force from above due to the weight of the person is repeatedly applied to the seat body 3, and the seat 3
Will often be hit with water. Also, the sheet 3 may be immersed in the water due to the capsizing of the hull 1.
Under such conditions of use, water penetrates into the core material through the seam of the outer cover 35 or the hole 300 of the bottom plate 30. However, since the main core materials 31, 32, and 33 are composed of independent foams, water is introduced. The water that is hardly sucked or slightly sucked is pushed out by the weight of the person from the upper part of the sheet 3 and is easily discharged through the recess 331 and the holes 320, 330, and 300, and the water is contained in the core material. Is prevented from accumulating for a long time. Water is also circulated around the water-absorbing sub-core 34, and this water is also discharged from the recess 301 through each layer of the main core. In the embodiment shown in FIGS. 4 and 5,
The functions and effects are almost the same.

It should be noted that the urethane foam material cannot be used as a cushion material for this kind of sheet because it is hydrolyzed and deteriorates when it absorbs water. In addition, since drainage is performed well, it can be used as a cushion material.

The sheet 3 has a feature that the main core acts as a buoyant body when immersed in water because most of the volume of the sheet 3 is constituted by a non-water-absorbing independent foam. Further, since the holes are formed in the main core material, the cushioning property of softness according to the size and distribution degree of the holes is exhibited. When the load due to the weight acts statically, such as when the hull 1 is stationary or running at a low speed, the sub-core material 34 having a high cushioning property exhibits the soft cushioning property required for the seat 3. .

[0019]

As described above, according to the present invention, the core material covered by the bottom plate and the outer skin is made of a single-layer plastic foam, and the core material has a plurality of openings at the lower surface. Due to the formation of the crests, the compressive force from the top by the weight of the person on the sheet is repeatedly applied to the sheet body even underwater or in an atmosphere where water is struck, so that the absorbed water can pass through the recesses well. Will be discharged. Therefore, problems such as generation of offensive odor, increase in weight, and deterioration of the core material do not occur. Further, since the core material occupying the majority of the sheet is formed of a plastic foam, it acts as a buoyant body, and the cushioning properties of the sheet can be adjusted by adjusting the size and distribution of the concave portions.

[Brief description of the drawings]

FIG. 1 is a perspective view of an entire hull showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a seat portion of the hull.

FIG. 3 is an enlarged cross-sectional view of the seat.

FIG. 4 is a cross-sectional view showing another example of the seat.

FIG. 5 is a cross-sectional view showing still another example of a sheet.

FIG. 6 is a partial sectional side view of the water jet propulsion device.

FIG. 7 is a partially cutaway perspective view of the water jet propulsion device.

FIG. 8 is a partially cutaway perspective view showing another example of the water jet propulsion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hull 2 Operating handle 3 Seat 6 Seat base 30 Seat bottom plate 31, 32, 33 Layer of main core material 34 Secondary core material 35 Outer skin of sheet 301, 302, 303 Concavity of sheet

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A47C 7/18 A47C 27/14 B32B 5/22 B63B 29/04

Claims (2)

(57) [Claims] 1. A sheet is formed by covering a cushioning core material with a bottom plate and an outer skin, and the core material is formed of a single layer.
It is made of plastic foam and has an open bottom
A plurality of crests are formed, and the bottom plate has
A hole is formed at a position corresponding to the concave portion.
In addition, an opening is provided on the upper surface of the sheet table on which the sheet is placed.
Formed, a storage case is fitted into the opening, and the sheet
Is the upper surface of the seat base through the cushion material around the opening
And the cushioning material overlaps with the hole in the bottom plate.
A seat structure for a small boat or the like, which is arranged so as not to be disturbed. 2. The method according to claim 1, wherein the plurality of crests have different heights.
Sheet structures, such as small watercraft as claimed in claim 1, wherein the are.