JP3971161B2 - Water jet propulsion boat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water jet propulsion boat.
[0002]
[Prior art]
A water jet propulsion boat advances by jetting a jet generated by a jet propulsion machine having an impeller driven by an engine backward from an injection nozzle, and a driver straddling a straddle-type seat moves a steering handle. Is turned by swinging the deflector left and right by operating. Further, the ship speed is changed by controlling the engine output by grasping and releasing the throttle lever of the steering handle (see Japanese Patent Laid-Open No. Hei 4-221294).
[0003]
[Problems to be solved by the invention]
In the water jet propulsion boat described above, when landing on a quay or the like while traveling forward, the steering handle is operated while adjusting the strength of water sprayed from the spray nozzle by operating the throttle lever. Therefore, it is necessary to swing the deflector to the left or right, and it is desired to be able to shore smoothly by a simpler operation.
[0004]
The present invention has been made to satisfy the above-described demand, and an object of the present invention is to provide a water jet propulsion boat with improved docking performance.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a water jet propulsion boat that moves forward by jetting a jet generated by a jet propulsion device driven by an engine backward from an injection nozzle.
A pair of left and right reverse buckets that can swing left and right are provided behind the nozzle at the nozzle blocking position and the non-blocking position, and each reverse bucket has a rear opening and a nozzle at the blocking position. A reverse injection port capable of injecting the jet flow obliquely forward is formed, a lid member capable of opening and closing each rear opening, and a link mechanism for opening and closing the reverse bucket and the lid member in conjunction with the operation lever. Doo is provided, when swinging to block the reverse bucket via link Organization in operation of the operating lever position with closed lid member via the link mechanism, the link mechanism by operating the operating lever when swinging the reverse bucket to a non-intercepting position via the the lid member via the link mechanism is so opened before the reverse bucket There is provided a water jet propulsion boat which is characterized.
[0006]
According to the present invention, when the reverse bucket is swung to the blocking position via the link mechanism by the operation of the operation lever, the lid member is closed via the link mechanism. By being reversed and reversely jetted diagonally forward from the left and right reverse injection ports, the reaction speed makes it easier to control the ship speed and enables smooth berthing.
[0007]
Further, during the swinging of the reverse bucket to the blocking position, the swinging force in the blocking position acts on the reverse bucket by the jet pressure acting on the closed lid member, so that the operation lever can be operated with a light force. .
[0008]
Furthermore, when the reverse bucket is swung to the unobstructed position via the link mechanism by operating the operation lever, the lid member is opened before the reverse bucket via the link mechanism , so the jet pressure acting on the lid member By releasing, the operation lever can be operated with light force.
[0009]
As in claim 2, in claim 1, a part of the link mechanism for opening and closing each lid member is displaced so as to hold the lid member in a state where the lid member is not opened by the jet pressure at a predetermined opening / closing position of the rear opening. Then, it becomes possible to prevent the lid member from being inadvertently opened by the jet pressure.
[0010]
As in claim 3, when the operation lever is provided on the steering handle of the hull and the reverse bucket is swung to the blocking position via the link mechanism by the operation of the operation lever. When the engine output is controlled to increase, the reverse injection switching operability is improved, and the engine output is increased regardless of the operation of the throttle lever so that a large amount of jet flow is reversed from the left and right reverse injection ports. Since the jet can be injected, the boat speed of the hull can be controlled more efficiently.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0012]
As shown in FIGS. 1 and 2, in the water jet propulsion boat, the hull 10 is composed of a hull member 11 and a deck member 12. A steering handle 13 is provided above the deck member 12, and a straddle seat 14 is provided at a rear position of the steering handle 13.
[0013]
On both sides of the seat base of the deck member 12, steps are provided for the operator straddling the straddle-type seat 14 to put both feet between the bulwark projecting upward from both sides of the deck member 12. Has been.
[0014]
An engine 15 is mounted in the engine compartment of the hull 10, and a jet propulsion unit 16 is mounted in the pump chamber 20 formed at the rear lower part of the hull member 11 of the hull 10. By rotating 16a, a jet flow is generated in the impeller 16a by the water a sucked from the water suction port 11a on the bottom of the boat, and the boat body 10 moves forward by jetting the jet flow b backward from the jet nozzle 18a. become.
[0015]
Further, by operating the steering handle 13 and swinging the deflector 18b supported by the pin 18c at the rear of the injection nozzle 18a so as to be able to swing left and right, the boat body 10 turns in the left-right direction. .
[0016]
Further, by operating the throttle lever 19 of the steering handle 13 and adjusting the opening of the throttle valve of the engine 15 to control the engine output, the boat speed is changed.
[0017]
The steering column 27 of the steering handle 13 is connected to the front end portion of the steering cable 21, and the rear end portion of the steering cable 21 is connected to the deflector 18b, whereby the deflector 18b is interlocked with the operation of the steering handle 13. Will swing left and right.
[0018]
As shown in FIGS. 3 to 5, front end portions 22 a of a pair of left and right box-like reverse buckets 22 (L, R) are supported by swing pins 23 on the upper and lower portions of the deflector 18 b, so that the injection nozzle The non-obstructing position P (see FIG. 4) and the intercepting position Q (see FIG. 3) of the jet b injected from the deflector 18b of 18a are rocked to the left and right in conjunction with link mechanisms 33 to 36 described later. I'm.
[0019]
The rear wall 22b of each reverse bucket 22 (L, R) is curved in a rearward circular arc shape, and a rear opening 22c is formed in the rear wall 22b, and from the deflector 18b at the blocking position Q. Duct-shaped reverse injection ports 22d capable of reversely injecting the jet flow b obliquely forward are formed.
[0020]
An arc-shaped lid member 24 capable of opening and closing the rear opening 22c from the outside is supported by a rotating shaft 25 on the upper wall 22e and the lower wall 22f of each reverse bucket 22 (L, R).
[0021]
Between the swing pin 23 of each reverse bucket 22 (L, R) and the pin 32 of the lever portion 25a of the rotation shaft 25 of each lid member 24, a first link 33, a second link 34, and a third link are provided. The link 35 and the fourth link 36 are connected in series, and the third link 35, which is a bell crank, is supported by the upper wall 22e of the reverse bucket 22 (L, R) with a pin 38 at the intermediate portion. .
[0022]
A torsion spring 39 is hooked on the third link 35 and the fourth link 36, and the third link 35 and the fourth link 36 are located at a position where the lid member 24 is closed by the urging force of the torsion spring 39. Is set to be linear, and the third link 35 and the fourth link 36 that are linear are not bent outwardly on the upper wall 22e of the reverse bucket 22 (L, R). A stopper 40 is provided for holding the stopper.
[0023]
At the left and right portions of the deflector 18b, both lower end portions 26a of a substantially inverted U-shaped arm 26 in front view are supported by pins 41 so as to be able to swing back and forth, and the upper portion 26b of the arm 26 and each of the first links. An intermediate portion 33 is connected by a fifth link 37.
[0024]
As shown in FIG. 2, the steering handle 13 is provided with an operation lever 28 at a position opposite to the throttle lever 19, and a front end portion of a bucket cable 29 is connected to the operation lever 28. The end portion is connected to the upper portion 26b of the arm 26. When the operation lever 26 is gripped, the bucket cable 29 moves in the direction d, the arm 26 is swung back, and when the loosening operation is performed, the bucket The cable 29 moves in the direction c and the arm 26 is swung forward.
[0025]
In the middle of the bucket cable 29, there is provided a stroke expansion lever 30 for expanding the operation stroke and the operation force for gripping / relaxing the operation lever 28 several times. An urging return spring 42 is provided.
[0026]
The operating lever 28 is connected to the throttle opening adjusting mechanism of the engine 15 by mechanical or electrical connecting means, and is controlled so that the engine output increases as the grip amount of the operating lever 28 increases. It has become. The engine output increase control by the operation lever 28 is performed regardless of the control by the throttle lever 19.
[0027]
The operation of the water jet propulsion watercraft reverse bucket 22 (L, R) configured as described above will be described.
[0028]
FIG. 6A shows a state where the reverse bucket 22 (L, R) is swung to the blocking position Q when the operating lever 28 is fully gripped during landing, for example.
[0029]
That is, when the operation lever 28 is grasped and operated, the front bucket cable 29 moves in the direction d, and the stroke expansion lever 30 turns right against the urging force of the return spring 42. The rear bucket cable 29 moves in the d direction, and the arm 26 is swung back.
[0030]
As a result, the fifth link 37 moves in the d direction (backward) and the reverse bucket 22 (L, R) is swung to the blocking position Q via the first to third links 33 to 35. The lid member 24 is swung to the closed position via the fourth link 36.
[0031]
In this state, the entire jet b from the deflector 18b of the injection nozzle 18a is reversed on the inner surface of the arc-shaped lid member 24 and back-injected obliquely forward from the reverse injection port 22d. As shown in FIG. 9, the jet b reversely injected obliquely forward from the reverse injection port 22 d passes under the bottom of the hull 10.
[0032]
As described above, when the reverse bucket 22 (L, R) is swung to the blocking position Q by the grip operation of the operation lever 28, the lid member 24 is closed by the links 33 to 37. The jet b from the deflector 18b is reversed in the reverse bucket 22 (L, R) and back-injected obliquely forward from the left and right reverse injection ports 22d. You will be able to dock at the shore.
[0033]
Further, in the state where the lid member 24 is swung to the closed position, the third link 35 and the fourth link 36 are linear and are held by the stopper 40, so that the lid member 24 is a jet of the jet b. It becomes possible to prevent inadvertent opening by pressure.
[0034]
Furthermore, when the reverse bucket 22 (L, R) is swung to the blocking position Q, the engine output is controlled so as to increase, so that the reverse injection switching operability is improved and the throttle lever 19 is not operated. Since the engine output increases and a large amount of jet can be back-injected from the reverse injection port 22d, the boat speed control of the hull 10 can be performed more efficiently.
[0035]
On the other hand, when the operation lever 28 is loosened, the stroke expanding lever 30 is turned to the left by the urging force of the return spring 42, and the front bucket cable 29 moves in the d direction following the loosening operation of the operation lever 28. The side bucket cable 29 moves in the direction c, and the arm 26 is swung forward.
[0036]
At the initial stage of the forward swing of the arm 26, as shown in FIG. 6B, first, the lid member 24 is moved from the fifth link 37 moving in the c direction (forward direction) through the first links 33 to 36. Is swung in the opening position direction, so that a part of the jet pressure b acting on the lid member 24 escapes rearward from the rear opening 22c.
[0037]
At this time, the third link 35 and the fourth link 36 are folded twice against the urging force of the torsion spring 39, so that the jet flow is accompanied by the swinging of the lid member 24 in the opening position direction. The reverse bucket 22 (L, R), which is less likely to be subjected to the pressure b, swings in the non-shielding position P direction by the urging force of the torsion spring 39.
[0038]
Thus, when the reverse bucket 22 (L, R) is swung to the unobstructed position P, the lid member 24 is opened before the reverse bucket 22 (L, R) and acts on the lid member 24. Since the jet pressure b is released, the operation lever 28 can be operated with light force.
[0039]
Next, as shown in FIG. 7A, the lid member is moved from the fifth link 37 moving in the c direction through the first links 33 to 36 by further swinging of the arm 26 due to the loosening operation of the operation lever 28. The reverse bucket 22 (L, R) is swung in the direction of the non-blocking position P while the rocker 24 is swung in the opening position direction.
[0040]
Then, as shown in FIG. 7B, when the reverse bucket 22 (L, R) finishes swinging to the unobstructed position P, the lid member 24 swings to the closed position by the urging force of the torsion spring 39. At the same time, since the third link 35 and the fourth link 36 are linear and are held by the stopper 40, the lid member 24 can be prevented from being inadvertently opened by the jet pressure of the jet b.
[0041]
As described above, when the reverse bucket 22 (L, R) swings to the unobstructed position P, the entire jet b from the deflector 18b of the injection nozzle 18a is injected backward, so that the hull 10 moves forward. Become.
[0042]
When the operation lever 28 is gripped again from this state, the front bucket cable 29 moves in the direction c as described above, and the stroke expansion lever 30 turns right against the urging force of the return spring 42. As a result, the bucket cable 29 on the rear side of the stroke expansion lever 30 moves in the d direction, the arm 26 is swung back, and the fifth link 37 moves in the d direction (rear), so that the first to fourth links The reverse buckets 22 (L, R) are swung in the blocking position Q direction through the state 33 to 36 while the lid member 24 is swung to the closed position.
[0043]
At this time, as shown in FIG. 8, the swinging force g in the blocking position Q direction acts on the reverse bucket 22 (L, R) by the jet pressure b ′ acting on the lid member 24 in the closed position. It can be operated with light power.
[0044]
In the above-described embodiment, the reverse bucket 22 (L, R) is swung left and right by the operation lever 28 of the steering handle 13, but instead of the operation lever 28, reverse injection that allows the operator to step on the foot. A foot pedal may be provided in the step, and the reverse bucket 22 (L, R) may be swung left and right by the reverse injection foot pedal.
[0045]
【The invention's effect】
As apparent from the above description, the present invention is such that when the reverse bucket is swung to the blocking position via the link mechanism by the operation of the operation lever, the lid member is closed via the link mechanism. The jet flow from the nozzle is reversed in the reverse bucket and back-injected diagonally forward from the left and right reverse injection ports, so that the reaction speed makes it easier to control the ship speed and enables smooth landing.
[0046]
Further, during the swinging of the reverse bucket to the blocking position, the swinging force in the blocking position acts on the reverse bucket by the jet pressure acting on the closed lid member, so that the operation lever can be operated with a light force. .
[0047]
Furthermore, when the reverse bucket is swung to the unobstructed position via the link mechanism by operating the operation lever, the lid member is opened before the reverse bucket via the link mechanism , so the jet pressure acting on the lid member By releasing, the operation lever can be operated with light force.
[0048]
When a part of the link mechanism that opens and closes each lid member is displaced so that the lid member is not opened by the jet pressure at a predetermined opening / closing position of the rear opening (Claim 2), the lid member is jetted. It becomes possible to prevent inadvertent opening by pressure.
[0049]
When the engine output is controlled to increase when the reverse bucket is swung to the blocking position via the link mechanism by the operation of the operation lever provided on the steering handle of the hull (Claim 3), the reverse injection is performed. The switching operability is improved, and the engine output is increased regardless of the operation of the throttle lever, and a large amount of jet can be back-injected from the left and right reverse injection ports, so that the boat speed of the hull can be controlled more efficiently. it can.
[Brief description of the drawings]
FIG. 1 is a side view of a water jet propulsion boat.
FIG. 2 is a perspective view of the water jet propulsion boat with a deck member removed.
FIG. 3 is a perspective view of the reverse bucket as viewed from the front side.
FIG. 4 is a perspective view of the reverse bucket as viewed from the rear side.
FIG. 5 is an exploded perspective view in which a part of the reverse bucket is omitted.
6A and 6B are reverse buckets, wherein FIG. 6A is a plan view of a closed position, and FIG. 6B is an initial plan view of opening.
7A and 7B are reverse buckets, in which FIG. 7A is a plan view in the middle of opening, and FIG. 7B is a plan view of the opening position.
FIG. 8 is a plan view of the reverse bucket in the initial stage of closing.
FIG. 9 is a perspective view showing the direction of a jet flow injected from a reverse injection port of a reverse bucket.
[Explanation of symbols]
10 Hull 13 Steering handle 15 Engine 16 Jet propulsion device 18a Injection nozzle 18b Deflector 22 (L, R) Reverse bucket 22c Rear opening 22d Reverse injection port 24 Lid member 28 Operation lever 33 First link 34 Second link 35 Third link 36 4th link 37 5th link P Unshielded position Q Blocked position

Claims (3)

In a water jet propulsion boat that advances by jetting a jet generated by a jet propulsion device driven by an engine backward from an injection nozzle,
A pair of left and right reverse buckets that can swing left and right are provided behind the nozzles at a blocking position and a non-blocking position of the jet of the nozzle, and each reverse bucket includes a rear opening and a nozzle at the blocking position. A reverse injection port capable of injecting a jet flow obliquely forward is formed, a lid member capable of opening and closing each rear opening, and a link mechanism for opening and closing the reverse bucket and the lid member in conjunction with the operation lever. When the reverse bucket is swung to the blocking position via the link mechanism by operating the operating lever, the lid member is closed via the link mechanism and the link mechanism is operated by operating the operating lever. when swinging the reverse bucket to a non-intercepting position via the the lid member via the link mechanism is so opened before the reverse bucket Water jet propulsion boat which is characterized.   The water jet propulsion boat according to claim 1, wherein a part of the link mechanism for opening and closing each lid member is displaced so as to hold the lid member in a state where the lid member is not opened by the jet pressure at a predetermined opening / closing position of the rear opening. An operating lever is provided on the steering handle of the hull, and the engine output is controlled to increase when the reverse bucket is swung to the blocking position via the link mechanism by the operation of the operating lever. The water jet propulsion boat according to claim 1 or 2.

Images