JP2003137182A - Water jet propulsion vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance a coast-landing property by exactly stopping a vessel body. SOLUTION: A throttle cable 42 is moved to a direction of opening a throttle valve by throttle opening mechanisms 46A, 46B at the time of larger movement of a reverse cable 37 after a reverse bucket 36 is pivoted to the lowermost pivoting position by a grip operation of an operation lever 32. Thereby, an output of an engine is increased and a reverse injection from the reverse bucket 37 is strengthened.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a water jet propulsion watercraft.

[0002]

2. Description of the Related Art A water jet propulsion watercraft advances by injecting a jet flow generated by a jet propulsion machine having an impeller driven by an engine rearward from an injection nozzle, and straddles a straddle type seat. The operator operates the steering wheel to swing the deflector left and right to steer the vehicle (Japanese Patent Laid-Open No. 2000-27258).
(See Japanese Patent Publication No. 5).

[0003]

In the water jet propulsion watercraft described above, it is desired to stop the hull accurately so that the water jet propulsion watercraft can be smoothly landed on the quay. .

The present invention has been made to satisfy the above-mentioned demands, and an object of the present invention is to provide a water jet propulsion boat in which the hulling property is improved by stopping the hull accurately.

[0005]

In order to achieve the above object, the present invention provides a water jet propulsion watercraft which advances by jetting a jet flow generated by an engine-driven jet propulsion machine rearward from an injection nozzle. , A throttle cable that connects the throttle lever and a throttle valve opening / closing pulley, and turns the throttle valve in the opening direction by gripping the throttle lever, and turns the throttle valve in the closing direction by loosening the throttle lever, A reverse cable is provided which connects the operation lever and the reverse bucket, swings the reverse bucket downward by a normal operation of the operation lever, and swings the reverse bucket upward by a reverse operation of the operation lever. Between the reverse cable and when moving more than the bottom swing of the reverse bucket of the reverse cable, Throttle up mechanism for moving the lot le cable to the throttle valve opening direction in which to provide a watercraft, characterized in that it is interposed.

According to the present invention, when the reverse cable is further moved after the reverse bucket is rocked to the lowermost rocking position by the normal operation (eg, gripping operation) of the operation lever,
By moving the throttle cable in the throttle valve opening direction with the throttle up mechanism, the engine output increases and the reverse injection from the reverse bucket becomes stronger.
Since the propulsive force of the hull can be arbitrarily controlled by operating the operation lever, the hull can be accurately stopped and the berth can be smoothly landed.

Further, since the throttle-up mechanism between the throttle cable and the reverse cable can have a mechanical structure, an electronic control device as in the case of using a servomotor is not required, so that the operation reliability is high, The manufacturing cost is also low.

Further, since the lower swinging of the reverse bucket and the opening operation of the throttle valve can be performed only by the normal operation of the operation lever, it is not necessary to separately operate the throttle lever, and the operation for stopping the hull can be further performed. You can do it quickly and reliably.

Furthermore, since the opening operation of the throttle valve is performed after the reverse bucket has rocked to the bottom, a large load from the reverse bucket due to the jet flow does not act on the bucket cable.

According to a second aspect of the present invention, the throttle-up mechanism includes an original vehicle, a bucket side driven vehicle in which a groove is engaged with a pin of the original vehicle and rotated, and an original vehicle delayed from the bucket side driven vehicle. It is composed of a Geneva mechanism having a throttle side driven vehicle that is rotated by engaging a groove with a car pin, the operation lever side reverse cable is connected to the original vehicle, and the bucket side driven vehicle has a reverse bucket side reverse cable. When the bucket side slave vehicle is rotated more than the bottom swing of the reverse bucket by connecting the throttle side slave vehicle with the throttle cable and rotating the original vehicle with the operation lever, the throttle side slave vehicle is throttled by the throttle valve. It can be configured to rotate in the opening direction.

With this structure, when the original vehicle is rotated by the normal operation of the operation lever, the pin of the original vehicle rotates the bucket side slave vehicle to swing the reverse bucket downward through the river cable. When the reverse bucket is swung to the lowest swing position, further rotation of the original vehicle causes the pins of the original vehicle to rotate the throttle side slave vehicle and move the throttle cable in the throttle valve opening direction. Due to
Since the engine output increases and the reverse injection from the reverse bucket becomes stronger, the propulsive force of the hull can be controlled arbitrarily by operating the operating lever, so that the hull can be stopped accurately and the berth can be smoothly landed. Like

Further, since the throttle-up mechanism has a mechanical structure consisting of the Geneva mechanism of the original vehicle and the slave vehicle, an electronic control device as in the case of using a servomotor is not required, so that the operation reliability is high. The manufacturing cost is also low.

Further, similarly to the first aspect, since the lower swing of the reverse bucket and the opening operation of the throttle valve can be performed only by the normal operation of the operation lever, there is no need to separately operate the throttle lever. The hull can be stopped more quickly and reliably, and the throttle valve is opened after the reverse bucket swings to the bottom, so a large load from the reverse bucket on the reverse cable acts on the reverse cable. Will not do.

According to a third aspect of the present invention, in the throttle-up mechanism, the first swinging member to which the operation lever side reverse cable is connected, the second swinging member to which the bucket side river cable is connected, and the throttle cable are provided. Third connected
When the second swing member is swung by the first swing member more than the bottom swing of the reverse bucket,
The third rocking member may be rocked in the throttle valve opening direction by the rocking member.

With this structure, when the first swinging member is swung by the normal operation of the operating lever, the second swinging member swings the reverse bucket downward via the reverse bucket side river cable. Then, further swinging of the first swinging member after swinging the reverse bucket to the lowest swinging position causes the third swinging member to swing to move the throttle cable in the throttle valve opening direction. As a result, the engine output increases and the reverse injection by the reverse bucket becomes stronger, so the propulsive force of the hull can be controlled arbitrarily by operating the operating lever, so that the hull can be stopped accurately and smoothly. You will be able to dock.

Further, since the throttle-up mechanism has a mechanical structure composed of the first to third rocking members, an electronic control device as in the case of using a servomotor is unnecessary,
Highly reliable operation and low manufacturing cost.

Further, similarly to the first aspect, since the lower swing of the reverse bucket and the opening operation of the throttle valve can be performed only by the normal operation of the operation lever, there is no need to separately operate the throttle lever. The hull can be stopped more quickly and reliably, and the throttle valve is opened after the reverse bucket swings to the bottom, so a large load from the reverse bucket acts on the bucket cable due to the jet flow. Will not do.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a water jet propulsion boat 1
The hull member 2 and the deck member 3 are joined together at their peripheral portions to form a hull 4, and an engine 6 is provided in an engine room 5 formed in the hull 4 at a substantially central position in the front-rear direction. A fuel tank 7 is installed in front of the engine 6, and a jet propulsion machine 10 is installed in a pump room 9 that is partitioned by a bulkhead 8 behind the engine room 5.

A steering handle 12 is provided on the front upper portion of the deck member 3, and a seat base 13 is provided on the rear upper portion of the deck member 3, and a seat seat 13 in the front-rear direction is provided on the seat base 13. 14 is detachably attached. Note that 15a and 15b are ventilation ducts that connect the engine room 5 to the atmosphere.

An impeller shaft 18 is connected to a crankshaft 16 of the engine 6 via a coupling 17, and an impeller (not shown) housed in an impeller housing 10a of the jet propulsion machine 10 is connected to the impeller shaft 18. The injection nozzle 19a is provided at the rear end of the impeller housing 10a, and the deflector 19b is attached to the injection nozzle 19a.

Then, the jet flow generated by the impeller of the jet propulsion machine 10 driven by the engine 6 is injected into the injection nozzle 19
By injecting backward from a, the hull 4 is propelled, and the operator straddling the straddle-type seat 14 operates the steering handle 12 to swing the deflector 19b of the injection nozzle 19a left and right. It will be turned.

The engine 6 is installed on the hull member 2 so that the crankshaft 16 extends in the front-rear direction of the hull 4,
An intake pipe 21 for each cylinder connected to an intake port of a cylinder head and an intake chamber 22 connected to an upstream end of the intake pipe 21 are provided on the port side of the engine 6, and the front of the engine 6 is provided. An intake silencer 23 is provided in the intake air silencer 23, and the intake silencer 23 and the intake chamber 22 are connected via an intake duct 24.

An exhaust pipe 25 connected to the exhaust port of the cylinder head is provided on the starboard side of the engine 6, and the exhaust pipe 25 penetrates the bulkhead 8 while extending to the rear of the engine 6. Connected to the water lock 26 in the pump room 9,
The discharge pipe 26a of 6 is connected to the outside of the boat.

A control box 28 is installed above the bulkhead 8 on the engine room 5 side.

As shown in FIGS. 2 and 3, an operating lever 32 is attached to the bracket 31 near the left hand grip 30L of the steering handle 12 by a rotating pin 32a. A front end portion 35b of an inner cable 35a of the operation cable 35 is connected to the operation lever 32.

A reverse bucket 36 capable of covering the rear of the deflector 19b is attached to a bracket 39 fixed to the injection nozzle 19a by bolts so as to be vertically swingable by a rotating pin 36a. A rear end portion 37c of the inner cable 37a of the reverse cable 37 is connected. The reverse bucket 36 is of a type that ejects a jet flow from a lateral hole 36b at the time of downward swing and reversely ejects from both sides of the hull forward through a hull side guide passage. There may be no type.

A throttle lever 41 is attached to a bracket 40 near the right handgrip 30R of the steering handle 12 by a rotating pin 41a, and a front end portion 42b of an inner cable 42a of a throttle cable 42 is attached to the throttle lever 41. The rear end portion 42c of the inner cable 42a is connected to a pulley 44 that opens and closes a throttle valve 43 provided in an intake passage of the engine 6.

When the operator grips the throttle lever 41 and operates a, the inner cable 42a moves in the direction c, the pulley 44 rotates counterclockwise e against the urging force of the return spring 45, and the throttle valve 43 opens. When the engine speed rises due to this, and the throttle lever 41 is loosened and the operation b is performed, the pulley 44 causes the return spring 4 to move.
Inner cable 42a while rotating clockwise f with the urging force of 5
Moves in the direction d and the engine speed decreases.

The throttle-up mechanism 46A of the first embodiment is installed between the rear end 35c of the inner cable 35a of the operation cable 35 and the front end 37b of the inner cable 37a of the reverse cable 37.

The throttle-up mechanism 46A is composed of a Geneva mechanism, and is provided with a disk-shaped original vehicle 47 and two followers 48 and 49.

The first mounting plate 50 of this Geneva mechanism
An original vehicle 47 is rotatably supported by a shaft 51, and two arms 53 are fixed to the original vehicle 47 with screws 52 at predetermined angular intervals. 54b are implanted respectively, and each pin 54b
On the outer periphery of the original vehicle 47 corresponding to a and 54b,
Arc-shaped depressions are formed to avoid contact with 49.

A bucket-side driven wheel 48, which is rotatably supported by a shaft 55 on a first mounting plate 50, faces the one pin 54a.
Circular arc portions that slidably contact the outer periphery of the original vehicle 47 are formed on the left and right sides, respectively, and a groove 48c is formed in the middle.

When the original vehicle 47 rotates counterclockwise from the state shown in FIG. 2, the pin 54a of the original vehicle 47 is in the groove 4 at the beginning of the rotation.
The bucket side driven vehicle 48 is turned rightward f by engaging with 8c (see FIG. 3 (a)), and the arc portion slides on the outer periphery of the original vehicle 47 when turned rightward f. The bucket side driven vehicle 48 is held at the position of the right turn f. After that, when the original vehicle 47 rotates to the right f, the pin 54a of the original vehicle 47 engages with the groove 48c so that the bucket side driven vehicle 48 is turned left e. Is brought into sliding contact with the outer periphery of the original vehicle 47, so that the bucket side driven vehicle 48
Is held at the position of the left turn e (state of FIG. 2).

For the other pin 54b, the first pin
A throttle-side driven vehicle 49, which is rotatably supported by a shaft 56, faces a mounting plate 50. The throttle-side driven vehicle 49 is formed with arcuate portions on the left and right that are in sliding contact with the outer periphery of the original vehicle 47. A groove 49c is formed in the middle.

When the original vehicle 47 further rotates counterclockwise from the state shown in FIG. 3A, the pin 54b of the original vehicle 47 moves into the groove 49.
By engaging with c, the throttle side driven vehicle 49 is turned rightward f (see FIG. 3 (b)), and when the right turn f is made, the arc portion slides on the outer periphery of the original vehicle 47. The throttle side driven vehicle 49 is held in the position of the right turn f.
After that, when the original vehicle 47 rotates rightward f, the pin 54b of the original vehicle 47 engages with the groove 49c and the throttle side driven vehicle 49
Is turned to the left, and the circular arc portion is slidably contacted with the outer periphery of the original vehicle 47 when the vehicle is turned to the left. Become so.

The original vehicle 47 is provided with a return spring 58 for urging the original vehicle 47 in the rightward rotation direction f, and the original vehicle 47 has a rear cable 35a of the lever side operation cable 35 of the operation lever 32. The end portion 35c is connected via a bracket 59.

When the operator grips the operation lever 32 (normal operation) a, the inner cable 35a is c
Direction, the original vehicle 47 rotates counterclockwise e against the biasing force of the return spring 58, and the operating lever 32
When the (b) is loosened (reverse operation), the inner vehicle 42a moves in the d direction while the original vehicle 47 is rotated clockwise f by the urging force of the return spring 58.

The bucket side follower 48 has a front end portion 37 of an inner cable 37a of the reverse cable 37.
When b is connected and the bucket side follower vehicle 48 turns right f, the inner cable 37a moves in the direction d, and the reverse bucket 36 swings downward against the urging force of the return spring 59. When the bucket side driven vehicle 48 turns left e, the reverse bucket 36 does not swing upward h due to the urging force of the return spring 59, so that the inner cable 37a moves in the direction c.

At the intermediate portion of the reverse cable 37,
While expanding the operation stroke of the operating lever 32,
It is preferable to provide a stroke expanding mechanism 66 and a boosting mechanism 67 for increasing the operating force and transmitting it to the reverse bucket 36. When the stroke expanding mechanism 66 is provided, the reverse bucket 36 can be operated by a small gripping / loosening operation of the operation lever 32.
Can be largely swung up and down, and when the booster mechanism 67 is provided, the operation lever 35 can be operated with a light force. As the stroke enlarging mechanism 66, a well-known structure using a lever ratio of a lever member (see the second embodiment) and a well-known structure using an electric motor as the booster mechanism 67 can be appropriately adopted.

The front end portion 61b of the inner cable 61a of the interlocking cable 61 is connected to the throttle side follower vehicle 49, and the rear end portion 61c of the inner cable 61a is connected.
Is connected to an intermediate portion of the throttle up lever 62.

The lower end of the throttle up lever 62 is rotatably supported on the second mounting plate 63 by a shaft 62a, and the upper end of the throttle up lever 62 is connected to the rear end 42f of the outer cable 42d of the throttle cable 42. The front end portion 42e of the outer cable 42d is connected to the bracket 40 of the throttle lever 41. For this throttle up lever 62,
A return spring 64 that urges in the direction of a right turn f,
A stopper 65 is provided for stopping at the right turning position f.

Then, the throttle side driven vehicle 49 turns to the right f
Then, the inner cable 61a moves in the c direction to rotate the throttle up lever 62 to the left e and
When the throttle-side driven vehicle 49 turns left e, the inner cable 61a moves in the direction d, and the throttle up lever 62 turns right f.

Since the rear end portion 42f of the outer cable 42d of the throttle cable 42 is connected to the throttle up lever 62, when the throttle up lever 62 turns to the left, the inner cable 42a
Moves in the c direction and the pulley 44 moves the return spring 4
Counterclockwise rotation e against the biasing force of 5, the throttle valve 43 is opened and the engine speed increases (throttle up).

Water jet propulsion boat 1 constructed as described above
The operation of the throttle-up mechanism 46A of the first embodiment will be described.

When the operator grips the throttle lever 41 and operates a while the water jet propulsion boat 1 is running, the inner cable 42a moves in the direction c and the pulley 44 rotates counterclockwise against the urging force of the return spring 45. Then, when the throttle valve 43 is opened to increase the engine speed and the throttle lever 41 is loosened and the operation b is performed, the pulley 44 is rotated clockwise by the urging force of the return spring 45 and the inner cable 42a is moved in the d direction. Engine speed will decrease.

On the other hand, in the case of stopping the hull 4 for landing or the like, if the operator loosens the throttle lever 41 and then releases it, the pulley 44 is urged by the return spring 45. The inner cable 42a moves in the direction d while rotating clockwise f, and the engine speed decreases.

When the operator releases the throttle lever 41 and operates the operation lever 32 at almost the same time as it is operated, as shown in FIG.
The inner cable 35a of No. 5 moves in the direction c, the original vehicle 47 is rotated counterclockwise e against the biasing force of the return spring 58, and the pin 54a of the original vehicle 47 is in the groove 48 at the beginning of the rotation.
The bucket-side driven vehicle 48 is held at the position of the right-handed turning f by engaging with c and turning the bucket-side driven vehicle 48 to the right f, and the arc portion slidingly contacting the outer periphery of the original vehicle 47. Like

When the bucket side follower vehicle 48 turns to the right f, the inner cable 37a moves in the direction d, and the reverse bucket 36 swings downward g against the urging force of the return spring 59. .

Subsequently, when the operator grips the operation lever 32 harder, the original vehicle 47 is rotated further to the left, and the original vehicle 47 is rotated.
Of the throttle side driven vehicle 4 by engaging the pin 54b of the
9 is turned rightward f, and the circular arc portion is slidably contacted with the outer periphery of the original vehicle 47, so that the throttle side driven vehicle 49 is held at the position of rightward turn f.

When the throttle side follower vehicle 49 turns right f, the inner cable 61a of the interlocking cable 61 moves in the direction c, the throttle up lever 62 turns left e, and the inner cable 42a of the throttle cable 42 moves.
Moves in the c direction and the pulley 44 moves the return spring 4
Counterclockwise rotation e against the biasing force of 5, the throttle valve 43 is opened and the engine speed increases (throttle up).

After that, when the operator loosens the operation lever 32, the inner vehicle 35a is moved in the direction d while the original vehicle 47 is rotated clockwise by the urging force of the return spring 58, and the original vehicle 47 is rotated clockwise f. Original vehicle 47 at the beginning of rotation
Of the throttle side driven vehicle 4 by engaging the pin 54b of the
9 is turned to the left, and the circular arc portion is brought into sliding contact with the outer periphery of the original vehicle 47, so that the throttle driven vehicle 49 is held at the position of the left turn e.

When the throttle side driven vehicle 49 turns left e, the inner cable 61a of the interlocking cable 61 moves in the direction d, the throttle up lever 62 turns right f, and the pulley 44 is urged by the return spring 45. While rotating f to the right, the inner cable 42a of the throttle cable 42 moves in the d direction, the throttle valve 43 is closed, and the engine speed decreases (throttle down).

As described above, when the original vehicle 47 is rotated by the operation of gripping the operating lever 32 while the water jet propulsion boat 1 is in motion, the pin 54a of the original vehicle 47 rotates the bucket side driven vehicle 48. , The reverse bucket 36 is oscillated downwardly via the river cable 37, and further rotation of the original vehicle 47 after the reverse bucket 36 is oscillated to the lowermost oscillation position causes the pin 56b of the original vehicle 47 to rotate. As a result, the throttle side driven vehicle 50 rotates, and the throttle cable 42 is moved in the throttle valve opening direction, so that the engine output increases and the reverse injection from the reverse bucket 36 becomes stronger. Since the propulsive force of the body 4 can be controlled arbitrarily, the hull 4 can be stopped accurately and the berth can be smoothly landed.

Further, since the throttle-up mechanism 46A has a mechanical structure composed of the Geneva mechanism of the original vehicle 47 and the subordinate vehicles 48, 49, an electronic control device as in the case of using a servomotor is not required, so that the operation is performed. High reliability and low manufacturing cost.

Further, the lower swing g of the reverse bucket 36 and the throttle valve 4 can be simply operated by gripping the operating lever 32.
Since the opening operation of 3 can be performed, the trouble of separately operating the throttle lever 41 is unnecessary, and the stopping operation of the hull 4 can be performed more quickly and reliably.

Furthermore, since the opening operation of the throttle valve 43 is performed after the reverse bucket 36 swings to the bottom, a large load from the reverse bucket 36 due to a jet flow does not act on the reverse cable 37.

4 to 9 show the throttle-up mechanism 46B of the second embodiment. The parts having the same configurations and operations as those of the throttle-up mechanism 46A of the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. To do.

As shown in FIGS. 4 and 5, the mounting plate 70 is provided with a first swinging lever 72 whose lower end is pivotally supported by a shaft 71, and a return spring 73 is used to rotate rightward f. Biased in the direction. An arcuate cam portion 72a is formed on the upper end portion of the first swing lever 72.

The rear end portion 35c of the inner cable 35a of the operation cable 35 of the operation lever 32 is connected to the first swing lever 72, and when the operation lever 32 is gripped and operated a, the inner cable 35a moves in the c direction. Is moved to the left, the first swing lever 72 is turned left e against the biasing force of the return spring 73, and the operation lever 3
When loosening operation 2 is performed, the first swing lever 72 is rotated rightward f by the urging force of the return spring 37, and the inner cable 35a is moved in the d direction.

At the left side position of the first swing lever 72,
A second swing lever 75 whose upper end is rotatably supported by a shaft 74 is provided, and a cam roller 76 is attached to an intermediate portion of the second swing lever 75.

When the first swing lever 72 is turned left e, the second swing lever 75 is turned right f by pushing the cam roller 76 by the cam portion 72a of the first swing lever 72. From the vicinity of the position of the maximum right turn f in FIG. 7, even if the first swing lever 72 further turns to the left e, the cam portion 72a sneaks under the cam roller 76 as shown in FIG. , The second swing lever 75 is held near the position of the maximum right turn f.

A third swing lever (throttle up lever) 78 having an intermediate portion swingably supported by a shaft 77 is provided at the left position of the second swing lever 75, and a return spring 79 swings left. While being urged in the e direction,
It is stopped by an eccentric stopper 80. A projection 78a is formed on the lower end of the third swing lever 78, and a rear end 42f of the outer cable 42d of the throttle cable 42 is connected to the upper end.

The third rocking lever 78 is pushed by the first rocking lever 72 and the second rocking lever 75 is rotated to the maximum right turn f.
When the first swing lever 72 further turns to the left after being swung and held near the position of, the protrusion 78a is pushed by the first swing lever 72 as shown in FIG. It turns around f.

The reverse cable 37 is divided into a first cable 37A and a second cable 37B and divided into a first cable 37A and a second cable 37B.
Front end 37 of inner cable 37d of cable 37A
e is connected to the lower end of the second swing lever 75, and the inner cable 37g of the second cable 37B.
The rear end portion 37i is connected to the reverse bucket 36.

A stroke expanding lever 82 is arranged between the rear end 37f of the inner cable 37g of the first cable 37A and the front end 37h of the inner cable 37g of the second cable 37B. The stroke expanding lever 82 is rotatably supported by a shaft 84 at a position lower than the intermediate portion, the rear end portion 37f of the first cable 37A is connected to the lower end portion of the stroke expanding lever 82, and the upper end portion is 2 Front end 37 of cable 37B
h is connected. The stroke expanding lever 82 is biased by the return spring 83 in the leftward turning direction e.

The stroke expanding lever 82 has a distance L1 between the turning center C (shaft 84) and the rear end 37f of the inner cable 37d of the first cable 37A, the turning center C (shaft 84) and the second cable. The distance L2 between the inner cable 37g of 37B and the front end portion 37h is L1 <L
The relationship of 2 is set so that the movement stroke of the inner cable 37g of the second cable 37B is larger than the movement stroke of the inner cable 37d of the first cable 37A.

At the intermediate portion of the first cable 37A, the operating force of the operating lever 32 is increased to increase the reverse bucket 36.
It is preferable to provide a booster mechanism 67 for transmitting to the. When the booster mechanism 67 is provided, the operation lever 35 can be operated with a light force. As the booster mechanism 67, a known structure using an electric motor can be appropriately adopted.

Water jet propulsion boat 1 constructed as described above
The operation of the throttle-up mechanism 46B of the second embodiment will be described.

When the operator grips the throttle lever 41 and operates a while the water jet propulsion boat 1 is running, the inner cable 42a moves in the direction c and the pulley 44 rotates clockwise against the urging force of the return spring 45. When the throttle valve 43 is opened to increase the engine speed and the throttle lever 41 is loosened and the operation is performed b, the pulley 44 is rotated counterclockwise by the urging force of the return spring 45 and the inner cable 42a is moved in the d direction. Engine speed will decrease.

On the other hand, in the case of stopping the hull 4 for berthing or the like, when the operator loosens the throttle lever 41 and then releases it, the pulley 44 is urged by the return spring 45. While rotating counterclockwise e, the inner cable 42a moves in the direction d, and the engine speed decreases.

When the operator releases the throttle lever 41 and operates the operation lever 32 at substantially the same time as the operation, the inner cable 35a of the operation cable 35 is moved in the direction c as shown in FIGS. 6 and 7. Move
The first swing lever 72 is rotated left e against the urging force of the return spring 73, and the cam portion 72a causes the cam roller 7 to rotate.
6 is pressed to turn the second swing lever 75 rightward f. The second swing lever 75 is held in the relationship between the cam portion 72a and the cam roller 76 near the position of the maximum right turn f.

When the second swing lever 75 turns right f, the inner cable 37d of the first cable 37A is c.
And the stroke expanding lever 82 is turned to the right f, whereby the inner cable 37g of the second cable 37B is moved in the direction d, and the reverse bucket 36 is moved.
Is oscillated downward against the biasing force of the return spring 59.

Subsequently, when the operator grips the operation lever 32 more strongly, the first swing lever 72 is further turned to the left as shown in FIGS. 8 and 9, and the first swing lever 7 is rotated.
At 2, the protrusion 78a is pushed and the third swing lever 78 turns rightward f.

When the third swing lever 78 turns right f, the inner cable 42a of the throttle cable 42 is rotated.
Moves in the direction c together with the outer cable 42d and the pulley 44 rotates right f against the biasing force of the return spring 45, the throttle valve 43 is opened and the engine speed increases (throttle up).

Thereafter, when the operator loosens the operation lever 32, the first swing lever 72 causes the return spring 7 to move.
Inner cable 35a while turning right by the urging force of 3
Moves in the d direction, the first swing lever 72 turns left e, and the pulley 44 rotates clockwise by the urging force of the return spring 45, while the inner cable 42a of the throttle cable 42 moves in the d direction. As a result, the third swing lever 78 turns right f, the throttle valve 43 is closed, and the engine speed decreases (throttle down).

As described above, when the first swing lever 72 is turned to the left by the grip operation of the operation lever 32 while the water jet propulsion boat 1 is running, the second swing lever 75 causes the river cable 37A to move. , 37B through reverse bucket 36
Further swinging the reverse bucket 36 to the lowest swinging position, and further swinging the first swinging lever 72 to the left after turning the reverse bucket 36 to the lowermost swinging position, the third swinging lever 78 rotates to the right. Then, by moving the throttle cable 42 in the throttle valve opening direction d, the engine output is increased and the reverse injection from the reverse bucket 36 is strengthened. Therefore, by operating the operation lever 32, the propulsive force of the hull 4 can be arbitrarily adjusted. Since it is possible to control the hull 4 accurately, the hull 4 can be stopped accurately and the berth can be smoothly landed.

Further, since the throttle-up mechanism 46B has a mechanical structure including the first to third swing levers 72, 75, 78, an electronic control device as in the case of using a servomotor is not required, and therefore the operation is performed. The reliability is high and the manufacturing cost is low.

Further, only by grasping the operating lever 32, the lower swing g of the reverse bucket 36 and the throttle valve 4
Since the opening operation of 3 can be performed, the trouble of separately operating the throttle lever 41 is unnecessary, and the stopping operation of the hull 4 can be performed more quickly and reliably.

Furthermore, since the opening operation of the throttle valve 43 is performed after the reverse bucket 36 swings to the bottom, a large load from the reverse bucket 36 due to the jet flow does not act on the bucket cables 37A and 37B.

Further, the operation lever 32 is moved to the steering handle 12
Since it is mounted in the vicinity of the left hand grip 30 on the left side, the operability is improved in combination with the throttle lever mounted in the vicinity of the right hand grip of the steering handle 12.

In each of the above-described embodiments, the steering handle 12 is provided with the operation lever 32 for gripping and loosening, but it may be a foot pedal type for stepping with a foot or a hand lever type for raising and lowering with a hand.

[0083]

As is apparent from the above description, according to the present invention, when the reverse cable is further moved after the reverse bucket is rocked to the lowest rocking position by the operation of gripping the operation lever, By moving the throttle cable in the throttle valve opening direction with the up mechanism, the engine output increases and the reverse injection from the reverse bucket becomes stronger, so the propulsive force of the hull can be arbitrarily controlled by operating the operating lever. The hull can now be stopped accurately and the berth can be smoothly landed.

Further, since the throttle-up mechanism between the throttle cable and the reverse cable can be mechanically constructed, an electronic control device as in the case of using a servomotor is not required, so that the operation reliability is high and the manufacturing is high. The cost will be low.

Further, since the lower swing of the reverse bucket and the opening operation of the throttle valve can be performed only by gripping the operating lever, the trouble of separately operating the throttle lever is not required, and the hull stopping operation is further facilitated. You can do it quickly and reliably.

Furthermore, since the opening operation of the throttle valve is performed after the reverse bucket swings to the bottom, a large load from the reverse bucket due to the jet flow does not act on the bucket cable.

According to a second aspect of the present invention, when the original vehicle is rotated by the operation of gripping the operating lever, the bucket side slave vehicle is rotated by the pin of the original vehicle and the reverse bucket is swung downward via the river cable. By further rotating the original vehicle after swinging the reverse bucket to the lowest swing position, the pin of the original vehicle rotates the throttle side slave vehicle and moves the throttle cable in the throttle valve opening direction. Since the engine output increases and the reverse injection from the reverse bucket becomes stronger, the propulsion resistance of the hull can be controlled arbitrarily by operating the operating lever, so that the hull can be stopped accurately and smoothly landed. become able to.

Further, since the throttle-up mechanism can be mechanically constructed by the Geneva mechanism of the original vehicle and the slave vehicle, an electronic control device as in the case of using a servo motor is not required, so that the operation reliability is high, The manufacturing cost is also low.

Further, similarly to the first aspect, since the lower swing of the reverse bucket and the opening operation of the throttle valve can be performed only by the operation of gripping the operation lever, it is not necessary to separately operate the throttle lever. The hull can be stopped more quickly and reliably, and the throttle valve is opened after the reverse bucket swings to the bottom, so a large load from the reverse bucket on the reverse cable acts on the reverse cable. Will not do.

According to a third aspect of the present invention, the first operation is performed by gripping the operation lever.
When the swing member is swung, the second swing member swings the reverse bucket downward via the reverse bucket side reverse cable, and after swinging the reverse bucket to the lowest swing position. Further swinging of the first swinging member causes the third swinging member to swing to move the throttle cable in the throttle valve opening direction, thereby increasing the engine output and increasing the reverse injection by the reverse bucket. Therefore, since the propulsion resistance of the hull can be arbitrarily controlled by operating the operation lever, the hull can be accurately stopped and the berth can be smoothly landed.

Further, since the throttle-up mechanism can be mechanically constructed by the first to third rocking members, an electronic control device as in the case of using a servomotor is unnecessary, so that the operation reliability is high, The manufacturing cost is also low.

Further, similarly to the first aspect, since the lower swing of the reverse bucket and the opening operation of the throttle valve can be performed only by the operation of gripping the operation lever, the trouble of separately operating the throttle lever becomes unnecessary, The hull can be stopped more quickly and reliably, and the throttle valve is opened after the reverse bucket has rocked to the bottom, so a large load from the reverse bucket acts on the bucket cable due to the jet flow. Will not do.

[Brief description of drawings]

FIG. 1 is a fragmentary side view of a water jet propulsion boat.

FIG. 2 is a system diagram of an idle-up mechanism of the first embodiment.

FIG. 3 is an idle-up mechanism, wherein (a) is a system diagram when the operating lever is gripped and operated, and (b) is a system diagram when the operating lever is further gripped and operated.

FIG. 4 is a system diagram of an idle-up mechanism of a second embodiment.

5 is an enlarged view of a main part of FIG. 4,

FIG. 6 is a system diagram of an idle-up mechanism when the operation lever is gripped and operated.

FIG. 7 is an enlarged view of a main part of FIG.

FIG. 8 is a system diagram of an idle-up mechanism when the operation lever is further gripped and operated.

9 is an enlarged view of a main part of FIG.

[Explanation of symbols]

1 water jet propulsion boat 6 engine 10 Jet propulsion machine 12 steering wheel 19a injection nozzle 30 hand grip 32 Control lever 35 Operation cable 36 reverse bucket 37 (A, B) Reverse cable 41 Throttle lever 42 Throttle cable 43 Throttle valve 44 pulley 46 (A, B) Throttle up mechanism 47 original car 48 Bucket side follower 49 Throttle side follower 61 interlocking cable 62 Throttle up lever 66 Stroke enlargement mechanism 67 Booster mechanism 72 First swing lever 75 Second swing lever 78 Third swing lever 82 Stroke expansion lever

Claims (3)

[Claims] 1. A water jet propulsion watercraft that moves forward by injecting a jet flow generated by an engine-driven jet propulsion device rearward from an injection nozzle to connect a throttle lever and a throttle valve opening / closing pulley to a throttle The throttle cable that turns the throttle valve in the opening direction by gripping the lever and turns the throttle valve in the closing direction by loosening the throttle lever is connected to the operation lever and the reverse bucket, and the normal operation of the operation lever is performed. There is a reverse cable that swings the reverse bucket downward with the reverse lever and swings the reverse bucket upward with the reverse operation of the operating lever.The reverse cable bottom swing of the reverse cable is provided between this throttle cable and the reverse cable. At the time of the above movement, move the throttle cable in the throttle valve opening direction. Water jet propulsion boat, characterized in that lot Lumpur-up mechanism is interposed. 2. The throttle-up mechanism includes an original vehicle,
It has a bucket side driven vehicle which is rotated by engaging a groove with a pin of the original vehicle, and a throttle side driven vehicle which is rotated by engaging a groove with a pin of the original vehicle after the bucket side driven vehicle. It consists of a Geneva mechanism, the operation lever side reverse cable is connected to the original vehicle, the reverse bucket side reverse cable is connected to the bucket side slave vehicle, the throttle cable is connected to the throttle side slave vehicle, and the original lever is connected by the operation lever. The water jet propulsion boat according to claim 1, wherein when the bucket-side driven vehicle is rotated more than the lowest swing of the reverse bucket by rotating the vehicle, the throttle-side driven vehicle is rotated in the throttle valve opening direction. 3. The throttle-up mechanism includes a first swinging member to which a reverse cable on the operation lever side is connected, and a second swinging member to which a river cable on the bucket side is connected.
And a third swing member to which the throttle cable is connected. When the second swing member is swung by the first swing member more than the lowermost swing of the reverse bucket, the first swing member moves the third swing member to the third swing member. The water jet propulsion watercraft according to claim 1, wherein the rocking member is rocked in the throttle valve opening direction.