JPH072386Y2 - Intake device for surfboard with propulsion unit - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an intake device for a surfboard with a propulsion device, which includes a propulsion device and an engine for driving the propulsion device.

[Conventional technology]

BACKGROUND ART Conventionally, there is a surfboard with a propulsion device provided with a water jet propulsion device and an engine for driving the propulsion device at the rear part of the surfboard body (for example, US Pat.
See the specification of 4,274,357). This kind of surfboard
By having a propulsion device, the registrability is improved.

[Problems to be solved by the device]

However, since the upper surface of the surfboard is extremely close to the water surface, seawater or the like easily enters the intake passage of the engine. Further, the splash of water splashed up at the rear part of the surfboard is easily sucked into the intake passage by the intake air to the engine located at the rear part and easily enters. Therefore, water easily enters the engine.

The present invention has been made in view of the above problems, and it is possible to prevent water from entering the engine from the intake passage and to use the upper surface of the surfboard body widely so that it is equipped with a propulsion unit that is excellent in rideability for the operator. It is intended to provide an intake device for a surfboard.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a propulsion device including a propulsion unit provided at a rear portion of a surfboard main body, and an engine disposed within a wall thickness of the rear portion of the surfboard main body and driving the propulsion unit. An intake device for a surfboard with a surfboard, wherein an intake part that opens upward is formed in the front half of the surfboard body, and an intake member that allows the passage of air and blocks the passage of water is provided in the intake part. A first intake passage, which is fixed so as not to project from the upper surface of the main body and has a recess formed in the surfboard main body corresponding to the lower surface of the intake member, and the first intake passage and the intake pipe of the engine. A second intake passage that is long in the front-rear direction is provided in the surfboard body so as to communicate with the.

[Action]

According to this invention, by fixing an air-permeable and water-impermeable intake member to the intake portion formed by opening upward in the front half of the surfboard body, water can enter the engine through the intake passage. It is possible to sufficiently introduce only the air (atmosphere) into the engine through the first and second intake passages while preventing this. In particular, since the intake part is provided in the front half of the surfboard body, there is little risk that the intake member will be splashed with water, and therefore intake to the engine is smoothly performed. Further, since the first intake passage is provided by the recess formed in the surfboard body portion corresponding to the lower surface of the intake member, a large intake area can be secured and an increase in intake resistance can be suppressed. In addition, since neither the engine nor the intake member protrudes upward from the upper surface of the surfboard body, there is no unnecessary material on the upper surface of the surfboard body, and the upper surface can be widely used to facilitate the pilot's boarding. You can

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a surfboard with a propulsion unit, 2 is a water jet propulsion unit, 3 is an engine, 4 is a fin, 5
Is a control grip, and 6 is a surfboard body. The water jet propulsion device 2 is provided at the rear portion 6a of the surfboard body 6, is driven by being connected to the engine 3, and injects the water sucked from the water intake port 2a to the rear B of the surfboard 1 from the injection port 2b. The surfboard 1 is given a propulsive force. The engine 3 is arranged within the wall thickness of the surfboard body 6 near the rear portion thereof, and its upper surface 6c is formed flat.

An intake portion 7A that opens upward is formed on the upper surface 6c of the front portion 6b of the surfboard body 6, and the intake portion 7A is formed.
In addition, an intake member 7 that allows passage of air and blocks passage of water is provided as shown in FIG. 2 in a state where it does not project upward from the upper surface 6c of the surfboard body 6. That is, the intake member 7 is breathable and water-impermeable,
Such an intake member 7 is made of, for example, a porous metal foam (for example, trade name: Cellmet: Sumitomo Electric Industries, Ltd.).
The surfboard body 6 is supported by the step portion 6d of the surfboard body 6 shown in FIG. 1 and is fixed by, for example, bonding. Of course, the step portion 6d of the surfboard body 6 and the intake member 7
A seal member (not shown) is interposed between and.

The surfboard body 6 is provided with a first intake passage 8 in which a recess is formed corresponding to the lower surface 7a of the intake member 7. In addition, a second intake passage 9 that connects the first intake passage 8 and an intake pipe (not shown) of the engine 3 is formed in the surfboard body 6 to be long in the front-rear direction.

Next, the operation will be briefly described.

A pilot (not shown) near the center of the surfboard 1
Ride and adjust the output of the engine 3 with the control grip 5 to enjoy surfing. At this time, the rear portion 6a of the surfboard 1 is submerged in the water, and the surfboard 1 is in a posture of rising frontward, and splashes are raised to the rear portion 6a.

In the above structure, in this invention, water is blocked by the intake member 7, and almost only air is taken into the engine 3 from the first and second intake passages 8 and 9. Moreover, since the intake member 7 is provided in the front portion 6b where there is little risk of splashing water, there is little risk of water entering from the seal member or the like between the surfboard body 6 and the intake member 7. Therefore, there is little risk that water will enter the engine 3.

By the way, since the intake member 7 is provided, intake resistance may increase and the output of the engine 3 may decrease.
On the other hand, in the present invention, the first intake passage 8 is provided with the recess formed in the surfboard body 6 corresponding to the lower surface 7a of the intake member 7, so that the intake area of the lower surface 7a of the intake member 7 is made large. You can Moreover, since the surfboard 1 itself is large in plan as shown in FIG. 2,
Again, the intake area of the intake member 7 can be increased. In this way, the intake area of the intake member 7 in FIG. 1 can be increased, so that the output of the engine 3 is less likely to decrease.

By the way, since the intake member 7 does not pass water, the intake member 7
It is conceivable that water will once be trapped on the upper surface of the and the intake will be blocked. On the other hand, in the present invention, since the intake member 7 is provided in the front portion 6b where the possibility of splash of water is small, the upper surface of the intake member 7 is less likely to be splashed with water. Therefore, since the intake air is smoothly performed, the output of the engine 3 is unlikely to decrease.

Further, since the upper surface 6c of the surfboard main body 6 does not have an unnecessary protruding portion upward, the upper surface 6c of the surfboard main body 6 can be widely used to allow an operator to easily board.

By the way, although the air intake member 7 is formed of porous metal foam in this embodiment, it may be formed of, for example, a semipermeable membrane.

Further, although the intake member 7 is provided in the front portion 6b of the surfboard body 6 in this embodiment, it may be provided in a large size in the front half portion of the body 6.

[Effect of device]

As described above, according to the present invention, the air-permeable and water-impermeable intake member is fixed to the intake portion formed by opening upward in the front half of the surfboard body. It is possible to sufficiently introduce only air into the engine while preventing the air from entering the engine. In particular, since the intake part is provided in the front half of the surfboard body, there is little risk that the intake member will get splashed with water, and therefore the intake to the engine will be smooth, and
Since the first intake passage is provided by the recess formed in the main body of the surfboard corresponding to the lower surface of the intake member, a large intake area can be secured, an increase in intake resistance can be suppressed, and a sufficient engine output can be secured. . Moreover, since neither the engine nor the intake member protrudes upward from the upper surface of the surfboard main body, there is no unnecessary material on the upper surface of the surfboard main body, and the upper surface is widely used to improve the rideability of the operator. be able to.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a surfboard showing an embodiment of the present invention, and FIG. 2 is a plan view of the same. 1 ... Surfboard with propulsion device, 2 ... Propulsion device, 3 ... Engine, 6 ... Surfboard body, 6a ... Rear part, 6b ...
Front part, 6c ... top surface, 7 ... intake member, 7a ... bottom surface, 8 ...
... first intake passage, 9 ... second intake passage.

Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number for FI FI technical display area F02M 35/10 (56) References Actual opening Sho 48-38600 (JP, U) Actual opening Sho 60-118599 (JP , U)

Claims (1)

[Scope of utility model registration request] 1. An intake device for a surfboard with a propulsion device, comprising: a propulsion device provided at a rear part of the surfboard main body; and an engine arranged within a wall thickness of the rear part of the surfboard main body to drive the propulsion device. , An intake part that opens upward is formed in the front half of the surfboard body,
An intake member, which allows passage of air and blocks passage of water, is fixed to the intake portion without protruding from the upper surface of the surfboard body, and a recess is formed in the surfboard body portion corresponding to the lower surface of the intake member. And a second intake passage formed in the surfboard body in the front-rear direction so as to communicate the first intake passage with the intake pipe of the engine. A surfboard intake device with a propulsion unit provided.