JP2001322596A - Jet propulsion planing boat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jet propulsion planing boat capable of relieving external force even if the external force acts on steering members for steering. SOLUTION: In this jet propulsion planing boat for respectively arranging the steering members 1, 201, 301 and 401 capable of changing water resistance applied to a hull at sailing time on the left and right both sides in the vicinity of a water surface of the jet propulsion planing boat gliding on the water surface so that the steering members of either of these left and right can form a first state of increasing resistance with water and a second state of reducing the resistance more than that-resistance, an external force relieving mechanism is arranged in a passage for operating the steering members for relieving the external force by changing to the second state side when the external force acts in the direction for changing to the second state in the first state of the steering members 1, 201, 301 and 401.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a personal watercraft (personal watercraft) that jets a stream of water backward and sails on the water in reaction to the jet.
Watercraft (Personal Watercraft); PWC
In particular, the present invention relates to a personal watercraft having a steering member as steering means.

[0002]

2. Description of the Related Art In recent years, so-called jet propulsion type personal watercraft have been widely used for leisure, sports or rescue. In a jet-propulsion type personal watercraft, generally, water sucked from a water inlet provided on a bottom surface of the boat is pressurized by a propulsion pump and jetted rearward to propel the hull.

[0003] In the case of this jet propulsion type personal watercraft, the direction of jetting water from behind is changed left and right by oscillating the steering nozzle disposed behind the injection port of the propulsion pump left and right. To steer the boat right or left.

Accordingly, in the case of a jet-propulsion planing boat having such a configuration, when the throttle is closed and the amount of water jetted from the propulsion pump is reduced, the force available for turning the boat (used for steering) At the same time)
Until the throttle reopens, the ability to steer the boat is reduced.

In view of the above situation, the applicant of the present invention has proposed a jet propulsion system having a steering member for steering that can maintain the steering ability even when the throttle is closed and the amount of water injected from the propulsion pump is reduced. Type of personal watercraft (Japanese Patent Application No. 2000-6708).

However, in the first state where the resistance of the steering member to water increases, when an external force in the direction of changing to the second state acts on the steering member, the external force acts on the steering member as it is. Become.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been developed in a jet propulsion planing boat capable of maintaining the steering of a boat even when the amount of water injected from a propulsion pump is reduced. It is an object of the present invention to provide a jet propulsion personal watercraft in which even when an external force acts on the steering member, the external force does not directly act on the steering member.

[0008]

According to the first aspect of the present invention, the above object can be attained by a jet propulsion personal watercraft having the following configuration. That is, the jet-propulsion personal watercraft according to the present invention includes a steering member capable of changing the resistance of water applied to a hull during navigation on both left and right sides near the water surface of the jet-propelled personal watercraft. In the jet-propulsion personal watercraft, the steering member is provided so that any one of the left and right steering members can form a first state in which resistance to water is increased and a second state in which resistance is smaller than that of the steering member. When an external force is applied to the steering member in the first state to change the steering member to the second state, the external force changes the state from the first state to the second state to reduce the external force. Is provided in a path for operating the steering member.

[0009] According to the jet-propulsion personal watercraft constructed as described above, the steering operation causes the stabilizer disposed on the side of the side on which the user wants to turn to increase the resistance to water. The water resistance on one of the boat's sides by placing the stabilizer in the second state, where the resistance to water is reduced, or by placing the stabilizers located on the side of the boat opposite the side to which you want to turn Not only when the propulsion pump is spraying a sufficient amount of water, but also when the injection amount is reduced, the boat can be steered either left or right without reducing the steering ability. The steering member can be steered (turned) in any direction, and when the steering member is in the first state, an external force having a direction to change the steering member to the second state side is applied. Then, by the external force, the steering member is changed to the second state side, a structure capable of alleviating the external force.

In the case of a jet propulsion personal watercraft equipped with the steering member, when the propulsion pump is injecting a sufficient amount of water, the steering action due to a change in the injection direction from the injection pump and The steering function by the steering member further enhances the steering function as compared with the case where only the steering action is performed by changing the injection direction from the injection pump.

In the jet propulsion planing watercraft, the external force reducing mechanism may contact and press the steering member to operate the steering member from the second state to the first state by two members. Along with the two members being able to bend around an attachment shaft pivotally connecting each other, a meshing portion is formed on each joint surface of the two members,
In addition, the structure may be such that these two members are pressed by a spring in a direction in which they are joined to each other. In such a case, the external force reducing mechanism can be arranged so as to be exposed to the outside of the boat. And it becomes a structure which is easy to recognize visually.

Further, in the jet propulsion planing watercraft, the external force reducing mechanism causes the steering member to move from the operating state of the steering member to the non-operating state by an elastic force during a path for operating the steering member from the second state to the first state. It is possible to adopt a configuration in which an elastic means that can be changed to the operation state side is interposed. In such a case, the configuration is simple.

[0013] In the jet propulsion planing watercraft, the external force reducing mechanism integrally arranges a first member having a flat cam surface on one end surface on a rotation shaft of a rotation type handle. At the same time, a second member having a plane cam surface to be joined to the plane cam surface of the first member is joined, and the first member and the second member are pressed by a spring in a joining direction to each other. With a configuration in which the connecting member connected to the steering member is attached to the second member, the external force acting on the steering members disposed on the left and right of the boat can be reduced by one external force reducing mechanism. A configuration that can be used.

By the way, in the configuration which is a prerequisite part of the jet propulsion planing boat, the steering member is
It may be constituted by a plate-like member arranged so as to be able to rise and fall with respect to the water flow caused by the boat's navigation around the pivot. In this case, a simple steering member is provided. Also,
In the configuration that is a prerequisite part of the jet propulsion planing boat, the steering member may be configured to be a member whose surface is immersable with respect to the bottom surface around the bottom of the ship. In this case, when the steering member is in the non-operating state (second state), the configuration is such that resistance during navigation is small. Further, in the jet-propulsion personal watercraft having this configuration, the immersion may be performed by a change in fluid pressure means included in the surface. In such a case, no related members are required. Becomes
It has a simple configuration. Further, in the configuration that is a prerequisite part of the jet-propulsion type personal watercraft, the steering member may be configured such that the part can be protruded with respect to a bottom surface around the bottom of the ship, and furthermore, In this configuration, the protrudable member is a plate-shaped member, and the plate-shaped member is in a protruding state (a first state) with respect to a flow of water due to navigation of the boat. When the boat is arranged obliquely so as to turn on the member side, resistance acting on the side of the hull of the hull due to the steering member on the actuated side is generated, and the steering action of the plate-shaped member serving as the steering member. Thereby, the steering can be more effectively performed. Further, in the configuration of the prerequisite part of the jet propulsion type personal watercraft described above, the steering member is protruded rearward in the horizontal direction at the rear end of the boat bottom, and the rear end side is vertically movable with respect to the base end side. Such a configuration may be made of a plate-like member provided with a changeable mounting angle. In such a case, the configuration is easy to assemble and maintain. Further, if both can be operated at the same time, there is an effect that the transition from the non-sliding state to the sliding state can be smoothly performed. Further, in the configuration of the prerequisite part of the jet-propelled personal watercraft, the jet-propelled personal watercraft is a small personal watercraft, and the steering member is provided with steering operation means (for example, a bar handle) disposed in front of a seat of the personal watercraft. , Etc.), the left or right steering member may be changed from a non-operating state (second state) to an operating state (first state) in conjunction with the left and right operations. In such a case, the steering mechanism is suitable for a personal watercraft requiring light weight and simplicity.

According to the second aspect of the present invention, the above object can be solved by a jet propulsion personal watercraft having the following configuration. That is, a steering member capable of changing the resistance of water applied to a hull during navigation is provided on both the left and right sides near the water surface of a jet propulsion planing boat that slides on the water surface.
In the jet-propulsion planing boat arranged in such a manner that any one of the left and right steering members can form a first state in which the resistance to water is increased and a second state in which the resistance is smaller than that, When an external force is applied to the steering member in the first state of the member to change the steering member to the second state side, the external force causes the steering member itself to elastically deform to the second state side to reduce the external force. It is characterized by being constituted so that.

According to the jet-propulsion personal watercraft constructed as described above, the steering member is operated so that the steering member disposed on the side of the side on which the user wants to turn has a first resistance that increases resistance to water. Or by setting the steering member disposed on the side of the boat on the side opposite to the side to be turned into the second state in which the resistance to water is reduced, thereby reducing the water on one side of the boat. The boat's resistance is changed (increased or decreased), so that the boat is able to inject a sufficient amount of water, and even if the injection quantity is reduced, the boat can be steered without reducing its steering ability. The steering member can be steered (turned) in any direction to the left or right, and has a vector that causes the steering member to change to the second state side in the first state. When force is applied by the external force, the steering member itself is elastically deformed to a second state side, a structure capable of alleviating the external force.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a jet-propulsion personal watercraft according to an embodiment of the present invention will be specifically described with reference to the drawings, taking a small personal watercraft as an example.

FIG. 1 is an overall side view of a personal watercraft with a steering member for steering provided with an external force reducing mechanism according to an embodiment of the present invention. FIG. 2 is an overall plan view of the personal watercraft of FIG.
FIG. 3 is a view of the steering member employed in the personal watercraft shown in FIG. 1 as viewed from the rear of the boat from which the deck portion is omitted.

In FIGS. 1 and 2, A is a hull, and this hull A is composed of a hull H and a deck D covering the hull H. A connection line connecting the hull H and the deck D all around is a gunnel line. G, and in this embodiment, the gunnel line G is located above the waterline L of the personal watercraft.

As shown in FIG. 2, a substantially rectangular opening 16 extending in the longitudinal direction on the upper surface of the hull A is formed slightly behind the center of the deck D, as shown in FIG. As shown in FIG. 2, a seat S for riding is arranged above the opening 16.

The engine E is arranged in a space having a "convex" cross section surrounded by the hull H and the deck D below the seat S. This engine E is a multi-cylinder (three-cylinder in this embodiment) engine E, and has a crankshaft 10b mounted in a direction along the longitudinal direction of the hull A as shown in FIG. Shaft 1
0b is connected to the propeller shaft 1 as shown in FIG.
5, it is integrally rotatably connected to the pump shaft side of the water jet pump P to which the impeller 21 is attached. The impeller 21 has its outer periphery covered with a pump casing 21C, and takes in water taken in from a water supply port 17 provided on the bottom surface of the personal watercraft through a water suction passage, thereby forming a water jet pump P.
Pressurizing and accelerating through the pump nozzle (spouting part) 21R whose water cross-sectional area has become smaller as it goes backwards, and is discharged from the rear end injection port 21K to obtain a propulsive force. I have.

In FIG. 1, reference numeral 21V denotes a stationary blade for rectification. 1 and 2, reference numeral 10 denotes a steering handle, which is a steering operation means. By operating the handle 10 left and right, the steering nozzle 18 behind the pump nozzle 21R is swung right and left. When the water jet pump P is operated, the boat can be steered in a desired direction.

As shown in FIG. 1, a reverse deflector 19 (FIG. 1) is provided above and behind the steering nozzle 18 so as to be swingable downward about a horizontally arranged swing shaft 19a. And the bowl-shaped deflector 19 is oscillated to a lower position behind the steering nozzle 18 to turn water discharged backward from the steering nozzle 18 forward.
It is configured to be able to move backward.

1 and 2, reference numeral 12 denotes a rear deck. The rear deck 12 is provided with an openable / closable hatch cover 29, and a small-capacity storage box is formed below the hatch cover 29. I have. Also, in FIG.
A front hatch cover 23 is provided below the hatch cover 23 with a box (not shown) for storing equipment and the like. Further, another hatch cover 25 is disposed above the front hatch cover 23 to form a two-layer hatch cover. The hatch cover 25 has an opening (not shown) provided at a rear end face. ) Can accommodate a life jacket or the like inside. In addition, as shown in FIG.
It protrudes rearward from the rear transom board.

In the personal watercraft according to the embodiment of the present invention, the steering member 1 is arranged as follows. That is, as shown in FIG. 3 or FIGS. 4 and 5, which are enlarged views of the main part, in this embodiment, the steering member 1 for steering is a part of the left and right bottom portions of the rear end of the boat. And the other member having the same shape as the recessed portion is attached to the steering member 1 around the pivot shaft 1a at the front end.
The rear end side of the steering member 1 projects downward from the second state in which the bottom surface of the steering member 1 and the bottom surface of the surrounding boat are flat (the state shown by solid lines in FIGS. 3, 4, and 5). They are arranged so that they can be freely protruded so as to be in one state (see a two-dot chain line in FIG. 5).

Each of these steering members 1
An attachment portion 1b is formed inside (upper) of the rear end portion, and the attachment portion 1b is attached to the bottom of the ship via a link mechanism 2 (see broken lines in FIGS. 3 and 4). The link mechanism 2 is configured to be able to form the second state to the first state or vice versa. The link mechanism 2 has a T-shaped link member 2 as shown in FIG.
A and a long plate-shaped link member 2B.
A is pivotally mounted on the bottom of the ship so as to be swingable, and the link member 2A is attached to the rear end 2b of the link member 2A.
One end (upper end) of B is pivotally mounted on the shaft. The other end (lower end) of the link member 2 </ b> B is pivotally attached to the rear end of the steering member 1. Further, the T-shaped lower end 2c of the link member 2A has
The rear end of the steering wire 4 is axially attached, and the link mechanism 2 can be swung about the axial attachment portion at the distal end of the link member 2A by the movement of the wire 4 in the longitudinal direction. It has become.

As shown in FIGS. 6 and 7, the distal end of the wire 4 is attached to the turning shaft 10A of the steering handle 10 via an attachment fitting 11, and this bar The left and right steering members 1 of the boat shown in FIG. 3 are protruded downward by operating the type steering handle 10 left and right, so that the boat can be steered left and right. I have. In FIG. 6, the wire 5 is a wire for swinging the steering nozzle 18 right and left. Also, in FIG.
Is a lever for operating the deflector 19. In the personal watercraft provided with the steering member 1 configured as described above, when the steering wheel 10 is steered to the left or right, if the steering wheel 10 is turned to the right side, for example, the steering wheel 10 is turned to the right, When the wire 4 attached to the attachment fitting 11 is pulled, the right steering member 1 is shifted from the second state to the first state, that is, the rear end side of the steering member 1 is shifted from the flat state to the surrounding bottom surface. When the boat projects downward, the resistance of water on the hull on the starboard side (right side) of the boat increases, and the boat starts turning right.
At this time, the degree of cutting of the handle 10, that is, the handle 10
Depending on the degree of turning (or swing angle) to the right (or left),
The degree of downward projection of the steering member 1 changes.

In the case of this embodiment, the steering member 1 is operated as described above by operating the steering wheel 10 to the right or left together with the swinging of the steering nozzle 18 to the right or left. When the water jet pump P is in a state of injecting a sufficient amount of water, steering can be more effectively performed as compared with a personal watercraft without the steering member 1, and
The steering state can be maintained by the steering member 1 even when the injection amount decreases or disappears.

The steering member may be configured as shown in FIG. That is, in the embodiment shown in FIG. 8, the steering member 1 is brought into contact with and pressed against the steering member 1 from one side (above) by operating the wire 4, whereby the steering member 1 is pivotally connected to the pivot shaft 35.
The second state is formed by the urging force of a spring ("torsion coil spring" in the embodiment shown in FIG. 8) 32 from the second state to the first state. It is configured as follows.

As an embodiment according to the present invention, the cam 30 is connected to the two members 30A and 30B by the attachment shaft 30.
a, and a meshing portion 31 meshing with each other as shown in FIG. 9 is provided on the joint surface of the pivotal support portions of these two members 30A, 30B. 31 are pressed by a spring 31a in a direction in which they are joined to each other. With this configuration, for example, when the steering member 1 is in the “first state” shown by the solid line in FIG. 11 or the two-dot chain line in FIGS. 8 and 10, the lower surface of the steering member 1 External force in contact with the protrusions and the like in the upward direction (force greater than the spring force of the springs 31a and 32)
8, the member 30B rotates against the member 30A by overcoming the pressing force of the spring 31a.
The steering member 1 can be returned to the second state side as shown by a solid line in FIG. 10 (or a two-dot chain line in FIG. 11).
Can be reduced. By the way, the spring force of the spring 31a (the force for releasing the meshing state) is set to be larger than the spring force of the spring 32. Also,
In these figures, H is the hull of the personal watercraft.

As another embodiment according to the present invention,
By operating the wire 4 shown in FIGS. 12 and 13 to cause the cam 130 to contact and press the steering member 1 from one side (above), the steering member 1 is pivoted about the pivot shaft 35. The first state shown by the two-dot chain line in FIG. 12 is swingable and operable from the second state shown by the solid line in FIG. 12, and the second state is formed by the urging force of the spring 32. It can also be configured so that: In the case of this embodiment, the cam 130 is integrally formed, and is located in the path for operating the steering member 1, that is, at the tip (the handle side) of the wire 4 for operating the cam 130, as shown in FIG. As shown, wire 4
A spring 132 for permitting the wire 4 to resiliently move toward the cam 130 (see arrow Y in FIG. 13) is disposed at the end of the handle 11 attached to the handle 11. Then, when an upward external force (a force greater than the spring force of the spring 132) acts on the lower surface of the steering member 1, the steering member 1 is pivoted similarly to the embodiment shown in FIGS. Overcoming the spring force of the spring 132 around the shaft 135, the first state shown by the two-dot chain line in FIG. 12 is temporarily shifted from the first state shown by the solid line to the second state shown by the solid line (only while the external force is acting). ) Can be returned, and the external force applied to the steering member 1 can be reduced. The spring 1
32 has a spring force capable of biasing the wire 4 toward the handle so that the steering member 1 can be operated in any of the first state and the second state when no external force is applied. And handle (see FIGS. 6 and 7)
With the operation described above, the cam 4 can be operated by extending and contracting (moving) the wire 4.
Therefore, the spring force of the spring 132 is set to be larger than the spring force of the spring 32. In FIG. 12, H is a hull of the personal watercraft. The center O of the dashed line in FIG. 13 indicates the rotation center (swing center) of the handle.

Further, as another embodiment according to the present invention, instead of the embodiment shown in FIGS. 8 to 13, the following configuration shown in FIG. 14 may be adopted. That is, as shown in FIG. 14 or FIG. 15, the turning shaft 10A of the handle 10 (see FIG. 1, FIG. 2, FIG. 6, FIG. 7).
A mechanism (external force alleviation mechanism) for alleviating external force acting on the steering member can be attached to the lower end of the steering wheel. That is,
A steering nozzle 18 is provided at the lower end of the rotating shaft 10A.
(See FIGS. 1 and 3) As an operating part, the flange member 18B is rotated via an attachment shaft 10B having the same diameter as the rotation shaft 10A and having a male screw at the upper end so as to rotate integrally. In addition to being fixed to the rotating shaft 10A side, the lower end of the flange member 18B is entirely disc-shaped in a side view (see FIG. 14) and has an engaging surface at the lower end, for example, a trapezoidal reverse. A member (first member) 10D having an engagement surface (planar cam surface) 10d having a trapezoidal alternately continuous shape (or a waveform) may be integrally attached with a bolt 10w. The engaging surface corresponding to the engaging surface 10d having the continuous shape, for example, the shape of a trapezoidal shape and an inverted trapezoidal shape alternately continuous (or may be a waveform if the engaging surface 10d is a waveform). A member (second member) 10E of the same shape having a mating surface (flat cam surface) 10e on the upper surface is engaged with the respective engaging surfaces 10d and 10e so that the mounting shaft 10B passes through the center.
e are joined in a state where they are engaged with each other, and the member 10E is pressed from the lower surface to the member 10D side (upper side) by a spring 10F,
It is arranged to maintain this joined state. This spring 10F
The mounting shaft 1 integrated with the rotating shaft 10A
0B penetrates and a nut 1 for fixing the spring 10F in a compressed state at the lower end of the mounting shaft 10B.
0G is arranged. The spring force of the spring 10F is such that when an external force acts on the steering member, the joint surfaces 10d and 10e move (rotate) by a predetermined angle around the central axis O10, that is, the engagement surface 10d On the other hand, the engaging surface 10e is configured to rotate within a predetermined angle range. Member 10
In the case of this embodiment, as shown in FIG. 15, the rotation angle range α is within the range in which the state where the convex end on the E side always exists can be maintained. Is about 50 degrees to the left and right (approximately 100 degrees for both sides). However, this angle may be set as appropriate in relation to the operating dimensions or the like at which the above-described steering member 1 (see FIG. 12) performs the avoiding operation due to the external force.

The fixed part 1 is integrally formed on the member 10E side.
0h (see FIG. 14) is formed as a pair on the left and right.
At 0h, the connecting portion 4A at the tip of the wire 4 whose rear end is connected to the steering member is connected via a bolt 10k.

According to the external force relieving mechanism configured as described above, when an external force acts on the steering member 1 (see FIG. 12) in various forms, the wire 4 is pulled to the rear side of the boat (left side in FIG. 14). The member 10E
Is absorbed by the joint surfaces 10d and 10e moving (rotating) by a predetermined angle about the central axis O10 in accordance with the magnitude of the external force on the member 10D. That is, the external force is absorbed by the spring force of the spring 10F through the vertical (axial) separation operation of the inclined portions of the joining surfaces 10d and 10e.

In the case of this embodiment, there is provided an embodiment in which the lower part of the rotating shaft 10A of the handle 10 (see FIGS. 1 and 2), which has not been effectively used in the past, can be effectively used. Since the engagement surface (joining surface) can be arranged in the hull, the appearance is improved and rust prevention is also effective.
Further, unlike the embodiment shown in FIGS. 8 and 13, one relief mechanism may be provided without providing for the left and right steering members, and the weight can be reduced.

In FIG. 14, reference numeral 45 denotes a bolt attachment point for connecting a tip end of a wire (not shown) for operating the steering nozzle, and the bolt attachment point 45 is provided at the flange member 10B. It is formed in a part of. In this manner, the steering nozzle can be arranged without physically interfering with a mechanism (member) for operating the steering nozzle or a mechanism (member) near a handle for operating a reverse reversing device (not shown).

By the way, the steering member of the jet-propulsion personal watercraft is not limited to the above.
"A steering member capable of changing the resistance of the hull of water during navigation is provided on each of the left and right sides near the water surface of the jet propulsion planing boat that slides on the water, and the first state in which the hull resistance with water increases. And a second state in which the hull resistance is smaller than that. "

Accordingly, for example, as shown in FIGS. 16 and 17, the rear end portion of the steering member 101 is formed so as to protrude rearward from the transom board 14, and a pivot shaft 102a for operation is provided. The link mechanism 102 which swings around the back of the transom board 14 (rear surface)
The link mechanism 102 is connected to the wire 4 extending from the handle 10 (see FIGS. 1 and 2) in the same manner as in the above-described embodiment, and the steering member 101 is pivoted about the pivot shaft 101a. It may be configured to swing and steer.

As another configuration, as shown in FIG. 18, a link member 202 is formed directly on a steering member 201 disposed on the left and right of the bottom of the boat, and the handle 10 ( By connecting one end of a wire 4 extending from FIG. 1 and FIG. 2), when the steering member 201 is in the second state, the steering member 201 is flat with the surrounding bottom surface, and the first state is achieved. In this state, the rear end side may project downward around the pivot shaft 201a as shown by a two-dot chain line, and the steering may be performed by the steering member 201. In this case, since a complicated link mechanism is not required, the configuration becomes simple,
This is effective in reducing the number of parts and in manufacturability.

Further, as shown in FIG. 19, concave portions 308 are formed on the left and right sides of the bottom of the boat, and a bendable plate-like member 301A is formed in the concave portion 308 by hydraulic or pneumatic pressure or the like. The steering member 301 is configured by being arranged to be able to retreat, and the plate-shaped member 301A
Is inside (upper) of the concave portion 308 as shown by a two-dot chain line in FIG.
When the ship is retreated, a vortex may be generated at that portion, and the hull resistance with water on that side (starboard or port) may be increased.

As shown in FIGS. 20 (a) and 20 (b), a plate-like member 401A is disposed on the left and right sides of the bottom of the boat so as to protrude and retreat below the bottom surface to form a steering member 401. As described above, the resistance to water can be increased at that portion by protruding and retreating the plate-like member 401A straight (or diagonally) from the bottom surface by driving means such as a wire, hydraulic pressure, or pneumatic pressure as described above ( Can be changed)
May be configured. In this case, in the case of FIG. 20A, when an external force acts on the plate-shaped member 401A,
The above-mentioned external force reducing mechanism to be retracted into the boat (hull),
For example, an external force reducing mechanism as shown in FIG. 13 or FIGS. In the case of FIG. 20 (b), by forming the plate-like member 401A itself from an elastic member (elastic body), the plate-like member 401A itself is provided with a function as an external force reducing mechanism. When an external force acts on the plate member 401A, the plate member 40
You may comprise so that 1A may elastically deform and reduce external force. In this case, as the elastic member, rubber or resin,
Various materials such as a spring material can be adopted. Although not shown, the plate-like member 401A may be configured so as to be bent backward at a portion where the plate-shaped member 401A protrudes from the bottom surface or at a boundary portion where the plate-shaped member 401A protrudes, so as to reduce external force. Further, as shown in FIG. 21, by disposing the plate-like member 401A projecting from the above-described bottom surface obliquely to the longitudinal direction of the boat, the plate-like member 4
If 01A is configured to serve as a rudder, a more effective configuration for the steering function is obtained.

By the way, in the case of the above embodiment, the boat is turned by increasing the resistance of the stabilizer 1 on the side on which the boat is to be turned to water.
The stabilizer 1 disposed on the side opposite to the side to be turned may be configured to turn with less resistance to water. For example, when it is desired to turn to the right, the boat 1 may be configured to turn to the right by operating the stabilizer 1 disposed on the port side so as to reduce resistance to water.

[0043]

According to the present invention, even when the amount of water injected from the propulsion pump is reduced, the ability to steer the boat can be maintained without reduction, and when an external force acts on the operating steering member. Even the external force is reduced.

[Brief description of the drawings]

FIG. 1 is an overall side view of a personal watercraft with a steering member provided with an external force reducing mechanism according to an embodiment of the present invention.

FIG. 2 is an overall plan view of the personal watercraft of FIG.

FIG. 3 is a view seen from the rear of the boat in which a deck portion showing a steering member portion employed in the personal watercraft shown in FIG. 1 is omitted.

FIG. 4 is a partially enlarged view of a steering member on the port side of the boat shown in FIG. 3;

FIG. 5 shows a steering member and its operating mechanism.
5 is a partial cross-sectional view taken along the line VV.

FIG. 6 is a partially enlarged side view of a structure for operating a steering member disposed on a handle portion when viewed from the side.

FIG. 7 is a plan view of FIG. 6 showing a configuration for operating a steering member and showing the vicinity of a steering wheel viewed from a plane.

8 is a diagram showing a configuration of a steering member having a configuration different from that provided with the steering member shown in FIGS. 3 to 5, and a configuration of an external force reducing mechanism arranged in a path for operating the steering member; FIG. 5 is a partial perspective view of a state in which a cover is partially removed when viewed obliquely from the rear.

9 is a partially enlarged rear view showing a structure of a meshing portion formed on a joint surface of two members constituting a cam constituting the external force reducing device shown in FIG. 8 (a view as seen from the rear of the boat). ).

10 shows a steering in which the two members constituting the cam are bent into the second state by an external force acting on the steering member (see the solid line in FIG. 10) in the first state of the configuration shown in FIG. FIG. 10 is a side view of the member (see the solid line in FIG. 10) and the external force reducing mechanism as viewed in the direction of arrows XX in FIG.

11 shows a steering member and an external force reducing mechanism in an operating state of the steering member before an external force acts on the steering member having the configuration shown in FIG. 8; FIG.
It is an arrow view.

FIG. 12 is a diagram showing a part of an external force relaxation mechanism and a steering member etc. according to a different configuration from the external force relaxation mechanism shown in FIGS. 8 to 11, showing states before and after an external force acts on the steering member. FIG. 5 is a side view of the rear end of the boat including the steering member and a mechanism (cam portion) for operating the steering member.

FIG. 13 is a partially enlarged side view of a portion attached to a handle showing an external force reducing mechanism for returning the steering member to a non-operating state when an external force is applied when the steering member shown in FIG. 12 is in an operating state. FIG.

FIG. 14 is a mechanism according to another embodiment different from the external force relaxation mechanism shown in FIGS. 8 to 13, and shows a main part of the external force relaxation mechanism which can be formed at the lower end portion of the handle of the boat and a configuration showing the vicinity thereof; It is a side view.

15 is a view taken in the direction of arrows XV-XV in FIG. 14 showing a planar arrangement of engagement surfaces (planar cams) in which trapezoids and inverted trapezoids of the external force relaxation mechanism shown in FIG.

FIG. 16 is a view showing a steering member according to another configuration different from the steering member shown in FIGS. 3 to 5 and FIGS.

17 is a cross-sectional view taken along the line XVII-XVII of FIG. 16, showing the steering member shown in FIG. 16 and its operating mechanism.

FIG. 18 is an enlarged side sectional view showing a steering member according to still another configuration.

FIG. 19 is an enlarged side sectional view showing a steering member according to still another configuration.

FIG. 20 is an enlarged side sectional view showing a steering member according to another configuration, in which (a) shows an embodiment in which the plate-like member is made of a rigid material, and (b) shows a plate-like member. It is a figure which shows the Example at the time of comprising an elastic body.

FIG. 21 is a partial perspective view of a bottom surface of a boat showing a steering member according to still another configuration, as viewed from the bottom surface side of the boat.

[Explanation of symbols]

 1,201,301,401 ... steering member

Claims (5)

[Claims] 1. A steering member capable of changing the resistance of water applied to a hull at the time of navigation, and a steering member provided on either side of the left and right sides of a jet-propelled personal watercraft that glides on the water surface. In the jet-propulsion personal watercraft arranged so as to form a first state in which the resistance to water is large and a second state in which the resistance is smaller than the first state, the first state of the steering member When an external force is applied to the steering member to change the steering member to the second state, the external force changes from the first state to the second state due to the external force, and the external force reducing mechanism that reduces the external force operates the steering member. A jet propulsion planing boat provided on a route. 2. A mounting shaft for pivotally connecting a cam for operating the steering member from a second state to a first state by contacting and pressing the steering member by the external force reducing mechanism. The two members are configured to be able to bend around the center, and a meshing portion is formed on each joint surface of the two members, and the two members are pressed by a spring in a direction in which the two members are joined to each other. The jet propulsion planing boat according to claim 1, wherein: 3. The external force reducing mechanism changes the steering member from the first state to the second state by an elastic force during a path for operating the steering member from the second state to the first state. 2. The jet propulsion watercraft according to claim 1, further comprising an elastic means capable of causing the watercraft to intervene. 4. The external force relieving mechanism integrally arranges a first member having a flat cam surface on one end surface thereof on a rotation shaft of a rotation type handle. A second member having a plane cam surface to be joined to the plane cam surface is joined, and the first member and the second member are pressed by a spring in a direction in which they are joined to each other. 2. A jet propulsion personal watercraft according to claim 1, wherein a connecting member connected to the member side is attached. 5. A steering member capable of changing the resistance of water applied to a hull at the time of navigation is provided on both left and right sides in the vicinity of the water surface of a jet-propelled personal watercraft that glides on the water surface, and any one of the left and right steering members is provided. In a jet-propulsion personal watercraft arranged so as to form a first state in which resistance to water is large and a second state in which resistance is smaller than the first state, the steering is performed in the first state of the steering member. When an external force is applied to the member to change it to the second state side, the steering member itself is elastically deformed to the second state side by the external force, so that the external force is reduced. Jet propulsion planing boat.