JP3971155B2 - 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 machine driven by an engine backward from an injection nozzle. A reverse bucket is provided which is supported so as to be swingable between a blocking position and a non-blocking position of the jet, and has a diversion hole for discharging the jet flow blocked at the blocking position in half, and the blocking position of the reverse bucket. The hull corresponding to each has an inlet for the jets discharged from each diversion hole of the reverse bucket, and a nozzle storage box with an open outer surface is attached to the port side and starboard side of the hull. A reverse injection nozzle that doubles as a lid member is stored in the nozzle storage box, which reversely jets the jet flow from each intake port in a substantially horizontal direction. The rear end of the reverse injection nozzle is hingedly connected to the nozzle storage box, and the spring is urged by the spring to be immersed in the nozzle storage box, and the spring pressure is resisted by the water pressure of the reverse injection flow. Thus , a water jet propulsion boat is provided in which the front end portion is swingably supported at an open position protruding outward from the nozzle storage box .
[0006]
According to the present invention, when the reverse bucket is swung to the blocking position, the jet flow is discharged from each diversion hole and taken in from each intake port, and the jet flow is reversely jetted substantially horizontally forward from each reverse jet nozzle. The reaction force makes it easier to control the ship speed and makes it possible to dock smoothly.
[0007]
In addition, the nozzle storage box that stores the reverse injection nozzle is normally closed by the reverse injection nozzle that doubles as a cover member biased by a spring. There is no risk of reverse inflow, and the reverse injection nozzle that also serves as a lid member is automatically opened against the biasing force of the spring when the water pressure of the reverse injection flows.
[0008]
Further, the operation is reliable with a simple structure, and the durability is improved.
[0009]
According to a second aspect of the present invention, the front end portion of the reverse injection nozzle and the inside of the nozzle storage box are connected by a plurality of links that are linear at the open position, and the bent portion of the link and the hinge connection of the rear end portion When the above-described spring is stretched between the two portions, the fully open position of the reverse injection nozzle can be regulated by a linear link.
[0010]
As in claim 3, when the front end portion of the surface serving as the lid member of the reverse injection nozzle is bent so that the reverse injection flow is reversely injected substantially in the horizontal front direction, the reverse injection flow is substantially reduced by the bent portion. Since it is jetted accurately in the horizontal direction, it will be possible to shore more smoothly.
[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 room of the hull 10, and a jet propulsion unit 16 is mounted in the pump chamber 50 formed at the rear lower part of the hull member 11 of the hull 10. By rotating 17, a jet flow is generated in the impeller 17 by the water a sucked from the water suction port 11 a on the bottom of the boat, and the hull 10 moves forward by jetting the jet flow b backward from the jet nozzle 18. Become.
[0015]
Further, by operating the steering handle 13 and swinging the deflector 43 at the rear of the injection nozzle 18 left and right, the hull 10 turns in the left and 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 ship speed (speed) is changed.
[0017]
As shown in FIGS. 3 and 4, triangular brackets 44 are fixed to both sides of the injection nozzle 18 with a plurality of bolts 45 at intervals that do not disturb the horizontal swing of the deflector 43. In both brackets 44, both side portions 46 a of the box-shaped reverse bucket 46 are support pins 47, and an unobstructed position U (see FIG. 3A) and an interrupted position D of the jet flow injected from the deflector 43 of the injection nozzle 18. (See FIG. 3B) is supported so as to be swingable up and down.
[0018]
One end of a steering cable 56 is connected to the steering column 55 of the steering handle 13, and the other end of the steering cable 56 is connected to the deflector 43, so that the deflector 43 is interlocked with the operation of the steering handle 13. Will swing left and right.
[0019]
The steering handle 13 is provided with an operation lever 26 at a position opposite to the throttle lever 19. When the operation lever 26 is gripped, the reverse bucket 46 is swung downward from the non-blocking position U to the blocking position D via the bucket cable 57. When the operation lever 26 is loosened / released, the return bucket causes the reverse bucket 46 to swing upward from the downward swing blocking position D to the non-blocking position U via the bucket cable 57.
[0020]
Between the steering wheel 13 side and the bucket cable 57 on the reverse bucket 46 side, a conversion device 58 for converting the grip / relaxation operation of the operation lever 26 into the vertical swing of the reverse bucket 46 is provided. No. 58 is capable of expanding the operation stroke and the operation force of the operation lever 26 several times by a boost mechanism using, for example, an electric device. The reverse bucket 46 may be swung up and down by an electric actuator that is driven by a switch or the like that is turned on / off when the operation lever 26 is grasped or loosened.
[0021]
The operation lever 26 is connected to the throttle opening adjustment mechanism of the engine by mechanical or electrical connection means, and is controlled so that the engine output increases as the grip amount of the operation lever 26 increases. It has become. The engine output increase control by the operation lever 26 is performed regardless of the control by the throttle lever 19.
[0022]
The reverse bucket 46 is covered with all of the side portions 46a, the upper portion 46b, and the rear portion 46c, and substantially covered with the upper half of the front portion 46d and the substantially rear half of the bottom portion 46e. When moved, the opening 46f formed by the substantially lower half of the front portion 46d and the substantially front half of the bottom portion 46e comes to face the rear end portion (injection port) of the deflector 43.
[0023]
The bottom portion (guide portion) 46e is a jet b at an angle θ1 of 90 degrees or less with respect to the direction of the jet b when the reverse bucket 46 swings downward (see an arrow) to the blocking position D (see FIG. 4). It is set to go inside.
[0024]
Left and right diversion hole rings 48 (L, R) that open to the side are attached to the upper portions of both side portions 46a of the reverse bucket 46, respectively. In addition, a partition plate that is partitioned at a substantially intermediate position in the left-right direction is attached to the inside of the reverse bucket 46, and by this partition plate, the jet flow ejected from the deflector 43 is approximately divided into left and right, It is preferable to discharge from the rings 48 (L, R) for use.
[0025]
When the flow path of the jet b that injects the jet generated by the impeller 17 backward is a normal flow path, the right and left side walls 50a of the pump chamber 50 where the vicinity of the rear end portion of the injection nozzle 18 is positioned have a positive flow. In order to guide the jet b injected from the deflector 43 of the injection nozzle 18 that is a path forward, the rear end of the reverse flow pipe 51 (L, R) that forms a reverse flow extending forward is exposed. A jet inlet ring 52 (L, R) is attached to each rear end.
[0026]
Each jet inlet ring 52 (L, R) is provided with each diverter hole ring 48 (L, R) when each reverse bucket 46 is swung down to the blocking position D. A semicircular stopper portion 52a for positioning the reverse bucket 46 at a position corresponding to 52 (L, R) and holding it from below is formed.
[0027]
As shown in detail in FIGS. 5 and 6, nozzles having an opening 60 a on the outer surface are formed at left and right symmetrical positions of the port side surface 11 c and starboard side surface 11 d close to the stern of the hull member 11 of the hull 10. The storage boxes 60 (L, R) are respectively arranged, and the nozzle storage boxes 60 (L, R) are fitted from the outside into the openings 11 e, 11 f of the flange side surfaces 11 c, 11 d, and the flanges on the side of the openings 60 a. The part 60b is watertightly fixed to each side surface 11c, 11d with a plurality of bolts 61.
[0028]
And the front-end part of each said reverse flow pipe 51 (L, R) is each connected with the rear wall 60c of each nozzle storage box 60 (L, R).
[0029]
In each of the nozzle storage boxes 60 (L, R), a square cylindrical left reverse injection nozzle 53L and a right reverse injection nozzle 53R are stored, respectively, and a rear end portion 53a of each reverse injection nozzle 53 (L, R). Are hinged to the upper and lower walls 60d, 60e of the nozzle storage box 60 (L, R) by hinge pins 62, respectively, and the front end (injection port) 53b protrudes outward from the nozzle storage box 60 (L, R). It is swingably supported between an open position (see FIG. 5) and a closed position (see FIG. 6) that immerses in the nozzle storage box 60 (L, R).
[0030]
The outer wall 53c of each of the reverse injection nozzles 53 (L, R) also serves as a lid member that closes the opening 60a of the nozzle storage box 60 (L, R) when in the closed position. The front end portion of the outer wall 53c, which serves as a lid member for each of the reverse injection nozzles 53 (L, R), is formed in a bent portion 53e so as to reversely inject the reverse injection flow f almost horizontally forward when in the open position. ing.
[0031]
One end of the two links 63 is a pin 64 on the upper wall 53d on the front end 53b side of each of the reverse injection nozzles 53 (L, R) and the upper wall 60d of each nozzle storage box 60 (L, R). Each link 63 is connected to the other end portion (bent portion) of each link 63 by a pin 65, and a spring 66 is stretched between the pin 65 and the hinge pin 62.
[0032]
The spring 66 is urged so that each reverse injection nozzle 53 (L, R) is always in the closed position, and is set to swing to the open position by the water pressure of the reverse injection flow f. The length of the link 63 is set so as to be linear when the reverse injection nozzle 53 (L, R) is in the open position (the state shown in FIG. 5A).
[0033]
In the case of the water jet propulsion boat as described above, the reverse bucket 46 is normally swung upward to the unobstructed position U (see FIG. 3A), and the jet b from the deflector 43 of the injection nozzle 18 Since everything is jetted backward, the hull 10 moves forward.
[0034]
When the hull 10 moves forward, that is, when the operation lever 26 is not gripped, each reverse injection nozzle 53 (L, R) is biased to the closed position by the spring 66, so that the outer wall 53c is the nozzle. Since it functions as a lid member that closes the opening 60a of the storage box 60 (L, R), there is no possibility that water will flow backward from the front end portion (injection port) 53b into each reverse injection nozzle 53 (L, R) (FIG. 6). State).
[0035]
On the other hand, when the operation lever 26 is gripped and operated at the time of berthing or the like, the reverse bucket 46 is swung down from the non-blocking position U to the blocking position D via the bucket cable 57 and the conversion device 58, and the reverse bucket 46 The reverse buckets 46 are held from below and positioned by the stopper portions 52a at positions where the respective diversion hole rings 48 (L, R) coincide with the respective jet inlet rings 52 (L, R) (FIG. 3). (See (b)).
[0036]
As a result, almost all of the jet b from the deflector 43 of the injection nozzle 18 is not jetted backward, but is almost divided into two in the reverse bucket 46 and discharged from the diversion hole rings 48 (L, R). Each reverse injection nozzle 53 (L, R) in each nozzle storage box 60 (L, R) is taken from the intake ring 52 (L, R) and passes through each reverse flow pipe 51 (L, R). ) Will be ejected inside.
[0037]
When the water pressure of the reverse injection flow f ejected into each reverse injection nozzle 53 (L, R) acts, each reverse injection nozzle 53 (L, R) biases the spring 66 by the water pressure of the reverse injection flow f. It will automatically swing to the open position against this (state of FIG. 5).
[0038]
As a result, the reverse injection flow f is reversely injected almost horizontally forward from each of the reverse injection nozzles 53 (L, R), so that the reaction speed of the reverse injection makes it easy to control the ship speed and smoothly. You will be able to berth.
[0039]
When the operation lever 26 is loosened / released after landing, the reverse bucket 46 is swung up to the unobstructed position U, and the reverse injection flow f is reversely injected from each of the reverse injection nozzles 53 (L, R). Accordingly, the reverse injection nozzles 53 (L, R) automatically swing to the closed position by the urging force of the spring 66 (the state shown in FIG. 6).
[0040]
Since each said reverse injection nozzle 53 (L, R) is each provided in the left-right symmetric position of the port side 11c and starboard side 11d of the hull 10 near a stern, each hull 10 each reverse injection nozzle 53 (L, R) ), The reverse injection flow f is reversely injected almost horizontally forward, thereby enabling smooth berthing.
[0041]
Further, when the reverse bucket 46 is moved to the blocking position D by the grip operation of the operation lever 26, if the engine output is controlled to increase, the reverse injection switching operability is improved and the operation of the throttle lever 19 is involved. Since the engine output is increased and a large amount of jets can be injected from the respective reverse injection nozzles 53 (L, R), the boat speed of the hull 10 can be controlled more efficiently.
[0042]
Furthermore, a nozzle storage box 60 (L, R) is attached to each side surface 11c, 11d of the hull 10, and a reverse injection nozzle 53 (L, which also serves as a lid member) is installed in the nozzle storage box 60 (L, R). , R), the reverse injection nozzle 53 (L, R) is hingedly connected to the nozzle storage box 60 (L, R), and the front end (injection port) 53c is connected to the nozzle storage box 60 (L, R). ) Is supported in a swingable manner between an open position projecting outward from the closed position and a closed position immersed in the nozzle storage box 60 (L, R). Will also improve.
[0043]
Furthermore, since each reverse injection nozzle 53 (L, R) and each nozzle storage box 60 (L, R) are connected by a link 63 that is linear at the open position, the link 63 is linear. As a result, the fully open position of the reverse injection nozzle 53 (L, R) can be regulated.
[0044]
Further, the front end portion of the outer wall 53c serving as a lid member for the reverse injection nozzle 53 (L, R) is formed in the bent portion 53e so as to reversely inject the reverse injection flow f substantially in the horizontal direction. Since the reverse injection flow f can be accurately injected almost horizontally forward by the portion 53e, it becomes possible to land more smoothly.
[0045]
Further, it is generated in the impeller 17 of the jet propulsion unit 16 by the reverse bucket 46 in which all of the side portions 46a, the upper portion 46b and the rear portion 46c, and the substantially upper half of the front portion 46d and the substantially rear half of the bottom portion 46e are covered. Since almost all jets can be back-injected from the left and right reverse-injection nozzles 53 (L, R), the boat speed of the hull 10 can be controlled efficiently.
[0046]
Further, on the left and right side walls 50a of the pump chamber 50 of the hull 10 corresponding to the blocking position D of the reverse bucket 46, each diversion hole ring 48 (L, R) of the reverse bucket 46 is each jet inlet ring 52. Since the stopper portion 52a for positioning the reverse bucket 46 at a position corresponding to (L, R) is provided, an excessive load does not act on the bucket cable 57 and the like of the reverse bucket 46 even when the jet b is strengthened.
[0047]
In addition, the bottom 46e of the reverse bucket 46 enters the jet b at an angle θ1 of 90 degrees or less with respect to the direction of the jet b when the reverse bucket 46 is swung down to the blocking position D (see FIG. 4). Since the reverse bucket 46 is guided so as to swing downward to the blocking position D by the jet pressure of the jet b ′ entering the bottom 46e, the reverse bucket 46 is lowered to the blocking position D. Oscillation is assisted by the jet pressure of the jet b ′, and the operating force of the operating lever 26 can be reduced.
[0048]
In the above embodiment, the reverse bucket 46 is swung up and down with the operation lever 26 of the steering handle 13, but instead of the operation lever 26, a reverse injection foot pedal that can be stepped on with a foot is used as a step. The reverse bucket 46 may be rocked up and down by the reverse injection foot pedal.
[0049]
【The invention's effect】
As is clear from the above description, when the reverse bucket is swung to the blocking position, the jet is discharged from each diversion hole and taken in from each intake, and is directed substantially horizontally from each reverse injection nozzle. By reverse injection, the ship speed can be controlled easily by the reaction force, and it will be possible to land smoothly.
[0050]
In addition, the nozzle storage box that stores the reverse injection nozzle is normally closed by the reverse injection nozzle that doubles as a cover member biased by a spring. There is no risk of reverse inflow, and the reverse injection nozzle that also serves as a lid member is automatically opened against the biasing force of the spring when the water pressure of the reverse injection flows.
[0051]
Furthermore, a nozzle storage box with an open outer surface is attached to the port side and starboard side of the hull , respectively, and the jet flow taken from each intake port is back-injected in a substantially horizontal direction in the nozzle storage box. A reverse injection nozzle that also serves as a lid member is housed, and a rear end portion of the reverse injection nozzle is hinged in the nozzle storage box and is energized by a spring so as to be immersed in the nozzle storage box, and a reverse injection flow Because the front end is swingably supported at the open position that protrudes outward from the nozzle storage box against the urging force of the spring due to the hydraulic pressure of the water, operation is reliable with a simple structure and durability is also achieved To improve.
[0052]
According to claim 2, the fully open position of the reverse injection nozzle can be regulated by the linear link.
[0053]
According to the third aspect, the reverse injection flow can be accurately injected almost horizontally forward by the bent portion , so that the berthing can be made more smoothly.
[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.
3A and 3B are reverse buckets, in which FIG. 3A is a cross-sectional side view of an essential part in an unobstructed position, and FIG.
FIG. 4 is a cross-sectional side view of an essential part of the reverse bucket in the initial swinging state.
FIG. 5 is a reverse injection nozzle in an open position, (a) is a perspective view, and (b) is a longitudinal sectional view.
6 is a reverse injection nozzle in a closed position, (a) is a perspective view, and (b) is a longitudinal sectional view. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Hull body 11 Hull members 11c and 11d Side surface 13 Steering handle 15 Engine 16 Jet propulsion machine 18 Injection nozzle 26 Operation lever 46 Reverse bucket 48 (L, R) Ring for diversion holes 50 Pump chamber 51 (L, R) Reverse flow path Piping 52 (L, R) Jet inlet ring 53 (L, R) Reverse injection nozzle 53a Rear end 53b Front end (lid member)
53e Bent part 60 (L, R) Nozzle storage box 62 Hinge pin 63 Link 66 Spring U Unshielded position D Blocked position f Reverse injection flow

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 reverse bucket is provided behind the nozzle so as to be swingable between a nozzle blocking position and a non-blocking position of the nozzle, and having a diversion hole for discharging the jet flow blocked at the blocking position in approximately half. In addition, the hull corresponding to the blocking position of the reverse bucket has an inlet for the jet flow discharged from each diversion hole of the reverse bucket, and the nozzle housing with the outer surface opened on the port side and starboard side of the hull Each nozzle box is mounted, and in this nozzle storage box is stored a reverse injection nozzle that also serves as a lid member that reversely jets the jet flow taken from each intake port in a substantially horizontal direction, and the rear end of this reverse injection nozzle The part is hinged in the nozzle storage box, and is spring-biased and closed in the nozzle storage box. Watercraft, characterized in that it is swingably supported and an open position projecting outwardly from the front end nozzle housing box against the biasing force of the grayed. The front end portion of the reverse injection nozzle and the inside of the nozzle storage box are connected by a plurality of links that are linear at the open position, and the spring is interposed between the bent portion of the link and the hinge coupling portion of the rear end portion. The water jet propulsion boat according to claim 1, wherein The water jet propulsion boat according to claim 1 or 2 , wherein a front end portion of a surface serving as a lid member of the reverse injection nozzle is bent so as to reversely inject a reverse injection flow substantially in the front in the horizontal direction.

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