JP4418488B2 - Small surface boat - Google Patents

Description

The present invention relates to a small surface watercraft configured such that a steering nozzle provided at the rear of a water jet propulsion device can swing left and right and up and down.
About.

  A small surface boat is known as a small boat that slides on the surface of the sea or lake. (For example, refer to Patent Document 1).

JP-A-9-281132 (second page, FIG. 1)

An example of the small surface boat shown in Patent Document 1 will be described below.
This small surface boat includes an engine and a jet propulsion device that is driven by the engine, and a steering nozzle at the rear end of the jet propulsion device. According to a small surface boat, an impeller of a water jet propulsion device is rotated by driving a jet propulsion device with an engine, and water is sucked from a suction port on the bottom of the boat by the rotation of the impeller.
By ejecting the sucked water as jet water from the rear end of the steering nozzle toward the rear, the small surface boat can be slid with the jet power of the jet water.

  The small surface watercraft is configured such that the steering nozzle can swing in the left-right direction in order to steer the hull in the left-right direction while sliding. Further, there is a configuration in which a steering nozzle can be swung in the vertical direction in order to keep a small watercraft in a suitable sliding posture.

  In this way, in order to configure the steering nozzle so that it can swing in the left-right direction and the up-down direction, an annular ring is placed on the rear end of the jet propulsion unit, and the left and right side portions of the ring are supported by the left and right spindles. The steering nozzle is covered with the front end of the steering nozzle, and the upper and lower ends of the steering nozzle are rotatably connected to the ring with upper and lower support shafts.

  Here, bolts are generally used as the left and right support shafts and the upper and lower support shafts. When installing these bolts, they are assembled with the bolt heads facing outward. In other words, by inserting the left and right bolts into the left and right openings from the outside of the ring and screwing the inserted bolts into the screw holes of the jet thruster, the ring can swing up and down with respect to the jet thruster. Can be attached.

In addition, the upper and lower bolts are inserted into the upper and lower openings from the outside of the steering nozzle, and by inserting them into the upper and lower openings of the ring, the upper and lower bolt tips are projected from the upper and lower openings of the ring. By screwing the nut to the lower bolt tip, the steering nozzle can be attached to the ring so as to be swingable in the left-right direction.
Accordingly, the steering nozzle can be attached to the jet propulsion device so as to be swingable in the left-right direction and the up-down direction.

  By the way, in order to swing the steering nozzle up and down, a normal operation cable is connected to the upper part of the steering nozzle by a joint. When the operation cable is connected to the steering nozzle by the joint, first, the joint is adjusted so that the protrusion amount of the joint becomes appropriate with respect to the operation cable.

Next, the mounting hole of the joint is fitted into the mounting bolt of the steering nozzle, and a nut is screwed to the tip of the mounting bolt protruding from the joint to connect the operation cable to the mounting bolt.
After connecting the operation cable to the mounting bolt, check whether the steering nozzle is attached at a proper angle.

If the steering nozzle is not in the proper direction, remove the nut from the mounting bolt and remove the joint from the steering nozzle.
Subsequently, by rotating the joint removed from the steering nozzle with respect to the operation cable, the protruding amount of the joint with respect to the operation cable is adjusted again.

After the readjustment is completed, the through hole of the joint is re-fitted to the mounting bolt, a nut is screwed to the tip of the mounting bolt protruding from the joint, and the operation cable is reconnected to the mounting bolt.
In this state, it is confirmed again whether or not the steering nozzle is attached at a normal angle. When the steering nozzle is attached at a regular angle, the operation of connecting the operation cable to the steering nozzle is completed.

  Thus, in order to readjust the steering nozzle angle to the normal state, it is necessary to remove the nut once screwed to the mounting bolt from the mounting bolt. For this reason, it takes time to adjust the direction of the steering nozzle to a normal angle.

  It is an object of the present invention to provide a small surface watercraft that can adjust the direction of the steering nozzle at a normal angle without taking time and effort during assembly.

In order to solve the above-mentioned problem, according to a first aspect of the present invention, there is provided a jet nozzle in which an engine and a jet propulsion device driven by the engine are arranged in this order, and jet water is injected rearward of the jet propulsion device. An annular trim ring is attached to the rear part of the jet nozzle so as to be swingable in the vertical direction with the left and right support shafts, and the steering nozzle is attached to the trim ring so as to be swingable in the horizontal direction with the vertical support shafts. A small watercraft with a steering nozzle attached to a jet nozzle so that it can swing in the vertical and horizontal directions.
An insertion groove is formed at the upper end of the steering nozzle , a positioning recess is formed in the jet nozzle, and a positioning through hole is formed in the trim ring. The insertion groove , the through hole, and the positioning A positioning pin is detachably inserted into the concave portion for use so that the axis of the steering nozzle coincides with the axis of the jet nozzle, and the steering nozzle can be fixed at the trim operation cable adjustment reference position. And

In the invention according to claim 1, the insertion groove formed in the steering nozzle, a through hole formed in the trim ring, by inserting the positioning pin detachably in a recess formed in the jet nozzle, the axis of the steering nozzle since it is configured so as to be fixed at the reference position which is aligned with the axis of the jet nozzle, insertion grooves, the through-hole, by a simple operation of just inserting the positioning pins from above detachably in the recess, the axis of the steering nozzle Since the steering nozzle whose axis coincides with the axis of the jet nozzle can be fixed at the reference position, the length of the trim operation cable can be adjusted without taking time and effort.

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, “front”, “rear”, “left”, and “right” follow the direction seen from the driver. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view showing a small surface boat according to the present invention.

  The small surface boat 10 is provided with a fuel tank 13 at a front portion 12 of a hull 11, an engine 14 is provided behind the fuel tank 13, a jet propulsion chamber 16 is provided at a stern 15 behind the engine 14, A water jet propulsion unit (jet propulsion unit) 17 is provided in the jet propulsion unit chamber 16, a steering nozzle 18 is provided behind the water jet propulsion unit 17, and a steering handle 19 that swings the steering nozzle 18 left and right is provided in the fuel tank 13. , A trim operation lever 20 that swings the steering nozzle 18 up and down is provided on the steering handle 19, a reverse bucket 21 is provided behind the steering nozzle 18, and a reverse operation lever 22 that swings the reverse bucket 21 up and down is provided. This reverse operation lever is provided behind the steering wheel 19 The sheet 23 extending in the front to 2 backward is provided, it is provided with a ride plate 24 to the bottom surface of the rear stern 15 of the sheet 23.

FIG. 2 is a cross-sectional view showing a main part of the small surface boat according to the present invention, and shows a state where the reverse bucket 21 is arranged at the rear position of the steering nozzle 18, that is, at the reverse position.
The water jet propulsion unit 17 forms a suction port 29 in the bottom 28 of the hull 11, extends the suction port 29 to the water jet propulsion unit chamber 16, and has a cylindrical stator on the wall 30 of the jet propulsion unit chamber 16. 31, an impeller 32 is rotatably disposed in the stator 31, and a drive shaft 34 (see FIG. 1) is connected to a shaft 33 of the impeller 32.

The water jet propulsion machine 17 has its axis 35 (the axis of the jet nozzle) descending at an angle θ1 (see also FIG. 1) toward the rear of the hull 11 with respect to a reference line 36 parallel to the horizontal line during sliding. The gradient is set.
The drive shaft 34 is an axis that outputs the driving force of the engine 14 by connecting the front end to the engine 14.

According to the small surface boat 10, the impeller 32 can be rotated by rotating the drive shaft 34 by the engine 14 shown in FIG. By rotating the impeller 32, water can be sucked from the suction port 29 and guided into the stator 31.
The small surface boat 10 can be slid by injecting the guided water from the rear end of the stator 31 to the rear as a water jet through the steering nozzle 18.

Here, the reason why the axis 35 of the water jet propulsion machine 17 is set to a downward slope at an inclination angle of θ1 toward the rear of the hull 11 with respect to the reference line 36 parallel to the horizontal line during the sliding is returned to FIG. I will explain.
The water jet propulsion machine 17 needs to efficiently take in water sucked from the suction port 29 and needs to efficiently jet the taken water as jet water. For this reason, it is preferable to arrange the jet nozzle 37 at the rear of the water jet propulsion machine 17 and the steering nozzle 18 attached to the jet nozzle 37 close to the boat bottom 28, that is, at a low position of the hull 11.

  On the other hand, the engine 14 is required to have a certain size in order to ensure an output necessary for driving the water jet propulsion machine 17. For this reason, the crankshaft shaft of the engine 14 (that is, the drive shaft 34 of the engine 14) is arranged at a position H that is somewhat higher than the boat bottom 28.

  Therefore, it is necessary to lower the jet nozzle 37 and the steering nozzle 18 below the high position H, and the axis 35 of the water jet propulsion machine 17 is set to the reference line 36 parallel to the horizontal line during the sliding. A downward slope of angle θ1 was set to the rear.

Here, by making the steering nozzle 18 swingable in the vertical direction, the axis 68 of the steering nozzle 18 can be aligned with the axis 35 of the water jet propulsion machine 17.
Thereby, jet water can be jetted downward from the steering nozzle 18. The advantages of jetting jet water downward from the steering nozzle 18 will be described in detail with reference to FIG.

  Returning to FIG. 2, the water jet propulsion machine 17 swings the trim ring 40 in the jet nozzle 37 at the rear end of the stator 31 in the vertical direction with left and right support shafts (bolts) 41 and 41 (the right side is shown in FIG. 4). The steering nozzle 18 is attached to the trim ring 40 so as to be swingable in the left-right direction with upper and lower support shafts (bolts) 42 and 43.

A trim operation cable (operation cable) 44 is connected to the steering nozzle 18 via an upper bolt 42, and the trim operation cable 44 is connected to the trim operation lever 20 (see FIG. 4) of the steering handle 19.
As a result, the trim operation cable 44 can be operated by the trim operation lever 20 to swing the steering nozzle 18 in the vertical direction around the left and right bolts 41, 41.
In this way, by swinging the steering nozzle 18 in the vertical direction about the left and right bolts 41, 41, the sliding posture of the hull 11 can be suitably maintained while the small surface boat 10 is sliding.

Further, the small surface boat 10 includes a ride plate 24 that can be removed from the hull 11 at a lower portion of the water jet propulsion unit 17 in the bottom surface of the stern 15.
The ride plate 24 is fixed to the hull 11 with bolts (not shown). The bottom surface 25 of the ride plate 24 (bottom surface of the stern) was set to have an upward slope of an angle θ2 toward the rear of the hull 11 with respect to a reference line 36 parallel to the horizontal line during the sliding.
Note that the advantage that the bottom surface 25 of the ride plate 24 is set to an upward slope of an angle θ2 toward the rear of the hull 11 with respect to a reference line 36 parallel to the horizontal line during the sliding is shown in FIG. explain in detail.

FIG. 3 is an exploded perspective view showing a main part of the small surface boat according to the present invention.
The steering nozzle mounting structure 38 constituting the small surface boat 10 can swing the trim ring 40 in the vertical direction around the left and right bolts 41, 41 with the left and right support shafts (bolts) 41, 41 at the rear part of the jet nozzle 37. The steering nozzle 18 is attached to the trim ring 40 with upper and lower support shafts (bolts) 42 and 43 so that the steering nozzle 18 can swing around the upper and lower bolts 42 and 43. It is attached to the jet nozzle 37 so that it can swing left and right.

  The trim ring 40 is an annular member, and left and right side mounting holes 45, 45 are provided on the left and right side portions of the trim ring 40, and a shaft portion 46 is provided on the upper portion of the trim ring 40. An upper mounting hole 47 is formed, and a lower mounting hole 48 is formed in the lower part.

The upper shaft portion 46 of the trim ring 40 is inserted into the steering nozzle 18 upper mounting hole 49, and the collar 50 is inserted into the space between the upper mounting hole 49 and the shaft portion 46. The upper bolt 42 is inserted into the upper mounting hole 47 from the inside of the trim ring 40, the nut 51 is fastened to the upper bolt 42 protruding from the upper portion of the steering nozzle 37, and the spacer 52 is fitted into the upper bolt 42 protruding from the nut 51.
A fitting hole 55 of the trim joint (connecting portion) 53 is fitted into the upper bolt 42 protruding from the spars 52, and a nut 56 is screwed to the upper bolt 42 protruding from the trim joint 53.

  A washer 57 is disposed between the trim ring 40 and the steering nozzle 18, and a washer 58 is disposed between the upper end 18 a of the steering nozzle 18 and the nut 51. Further, a washer 59 is disposed between the trim joint 53 and the nut 56.

Further, the lower bolt 43 is inserted into the lower mounting hole 48 of the trim ring 40 and the lower mounting hole 39 (see FIG. 4) of the steering nozzle 18 from the inside, and the nut 60 is screwed to the lower bolt 43 from the outside of the steering nozzle 18. .
Therefore, the steering nozzle 18 can be attached to the trim ring 40 so as to be swingable in the left-right direction around the upper and lower bolts 42, 43.

The left and right collars 61 and 61 are fitted into the left and right side mounting holes 45 and 45 of the trim ring 40, respectively, and the left and right bolts 41 and 41 are inserted into the left and right collars 61 and 61, respectively. Are screwed into the left and right screw holes 62 of the jet nozzle 37 (the right screw hole is not shown).
Therefore, the trim ring 40 can be attached to the jet nozzle 37 so as to be swingable in the vertical direction about the left and right bolts 41, 41.

  In this way, the trim ring 40 is attached to the jet nozzle 37 so as to be swingable in the vertical direction, and the steering nozzle 18 is attached to the trim ring 40 so as to be swingable in the left and right direction, thereby steering the jet nozzle 37. The nozzle 118 can be swingably mounted in the vertical direction and the horizontal direction.

  Here, the trim operation cable 44 is connected to the trim joint 53, and the trim operation cable 44 is connected to the trim operation lever 20 of the steering handle 19, whereby the trim operation cable 44 is operated by the trim operation lever 20 and the steering nozzle 18. Can be swung in the vertical direction around the left and right bolts 41, 41.

  In addition, a positioning recess (hereinafter referred to as “positioning recess”) 64 is formed in the jet nozzle 37, and a positioning through-hole 65 (hereinafter referred to as “positioning hole”) is formed in the trim ring 40, and the steering nozzle An insertion groove 66 is formed at the upper end of 18.

  The positioning pin 67 is inserted into the positioning hole 65 from the insertion groove 66 and the tip of the positioning pin 67 protruding from the positioning hole 65 is inserted into the positioning recess 64, whereby the axis 68 of the steering nozzle 18 is changed to the axis of the jet nozzle 37, that is, the jet It can be made to coincide with the axis 35 of the propulsion machine 17.

FIG. 4 is an enlarged cross-sectional view showing a main part of the small surface boat according to the present invention.
The upper shaft portion 46 of the trim ring 40 is inserted into the upper mounting hole 49 above the steering nozzle 18, the collar 50 is inserted into the space between the upper mounting hole 49 and the shaft portion 46, and the upper mounting hole 47 of the trim ring 40 is inserted. The upper bolt 42 is attached to the trim ring 40 and the steering nozzle 18 by inserting the upper bolt 42 from the inside of the trim ring 40 and screwing the nut 51 to the upper bolt 42 protruding from the upper portion of the steering nozzle 18.

  After the upper bolt 42 is attached to the trim ring 40 and the steering nozzle 18, the spacer 52 is fitted into the upper bolt 42 protruding from the nut 51. The mounting hole 55 of the trim joint 53 is fitted into the upper bolt 42 protruding from the spars 52, and a nut 56 is screwed to the upper bolt 42 protruding from the trim joint 53.

Thereby, the head (hereinafter referred to as “upper bolt head”) 42 a of the upper bolt 42 can be disposed so as to face the jet nozzle 37.
In addition, the length of the upper bolt 42 (upper bolt length) L1 is set so that the upper bolt 42 does not come off the steering nozzle 18 when the upper bolt 42 is loosened and the upper bolt head 42a hits the jet nozzle 37. That is, the upper bolt 42 is set so as to keep the state of being locked to the steering nozzle 18.
Therefore, even if the upper bolt 42 is loosened, the upper bolt 42 can be prevented from coming out of the upper mounting hole 47, and the upper bolt 42 can be prevented from dropping.

A lower bolt 43 is inserted into the lower mounting hole 48 of the trim ring 40 and the lower mounting hole 39 of the steering nozzle 18 from the inside, and a nut 60 is screwed to the lower bolt 43 from the outside of the steering nozzle 18.
The shaft portion 60 a of the nut 60 can be inserted into the lower mounting hole 39 of the steering nozzle 18.

By inserting the lower bolt 43 from the inside of the trim ring 40, the head of the lower bolt 43 (hereinafter referred to as “lower bolt head”) 43 a can be disposed so as to face the jet nozzle 37.
In addition, the length (lower bolt length) L2 of the lower bolt 43 is set so that the lower bolt 43 does not come off the steering nozzle 18 when the lower bolt 43 is loosened and the lower bolt head 43a hits the jet nozzle 37. That is, the lower bolt 43 is set so as to keep the state where it is locked to the steering nozzle 18.
Therefore, even if the lower bolt 43 is loosened, the lower bolt 43 can be prevented from dropping.

  The lower bolt 43 has the lower bolt head 43a positioned upward, so that the length (lower bolt length) L2 of the lower bolt 43 is reduced, the lower bolt 43 is loosened, and the lower bolt head 43a is connected to the jet nozzle 37. Even when the lower bolt 43 is not set so that the lower bolt 43 does not come off the steering nozzle 18 when it hits, that is, the lower bolt 43 is not locked to the steering nozzle 18, the lower bolt 43 is prevented from falling. Is possible.

  Further, when the trim ring 40 and the steering nozzle 18 are attached to the jet nozzle 37, particularly when the length of the trim operation cable 44 is adjusted, the positioning pin 67 is inserted into the positioning hole 65 from the insertion groove 66, and the positioning hole 65 is inserted. The tip of the positioning pin 67 protruding from the insertion is inserted into the positioning recess 64.

Thereby, the axis 68 of the steering nozzle 18 can be made to coincide with the axis of the jet nozzle 37, that is, the axis 35 of the water jet propulsion machine 17. Therefore, the direction of the steering nozzle 18 can be fixed at the reference position.
In this state, the length of the trim operation cable 44 is adjusted, and after the adjustment of the length of the trim operation cable 44 is completed, the positioning pin 67 is extracted from the positioning hole 65 and the positioning recess 64.

FIG. 5 is an enlarged view of part 5 of FIG.
The upper bolt 42 is inserted into the upper mounting hole 47 from the inside of the trim ring 40, the washer 58 is fitted into the upper bolt 42 protruding from the upper part of the steering nozzle 18, and the nut 51 is tightened from above the washer 58, thereby trimming the upper bolt 42. It can be fixed to the ring 40 and the steering nozzle 18.

The trim joint 53 attached to the upper bolt 42 is provided with a sphere 54 rotatably in the head portion 53a, and the sphere 54 is attached to the upper bolt 42 by fitting an attachment hole 55 of the sphere 54 into the upper bolt 42. Can do.
Thereby, the neck portion 53b can be swung in an arbitrary direction with respect to the sphere 54.

The screw portion of the rear end 72 of the trim operation cable 44 is screwed to the screw hole 71 formed in the neck portion 53b. That is, the trim operation cable 44 includes a rod portion 73 at the rear end portion, and a screw portion formed at the rear end 72 of the rod portion 73 is screwed to the screw hole 71 of the neck portion 53 b and tightened with the lock nut 70. Thereby, the trim operation cable 44 can be connected to the upper bolt 42.
Thus, the structure can be simplified by connecting the trim operation cable 44 using the upper bolt 42.

  By providing the joint means 74 in the middle of the rod portion 73, the rod portion 73 is divided into a front rod 73a and a rear rod 73b. The joint means 74 is formed by forming a flange 76 at the rear end of the front joint portion 75 via a protrusion, and a rear joint portion 77 is rotatably connected to the flange 76.

  The rear end screw of the front rod 73a is screwed to the screw hole 78 of the front joint portion 75 and tightened with a lock nut 79, and the front end screw of the rear rod 73b is screwed to the screw hole 80 of the rear joint portion 77 and locked. Tighten with nut 81. As a result, the front and rear rods 73 a and 73 b can be connected by the joint means 74.

Since the upper bolt 42 is fixed to the trim ring 40 and the steering nozzle 18, and the trim joint 53 is connected to the upper bolt 42, after the trim joint 53 is once fitted into the upper bolt 42, the length of the trim operation cable 44 is increased. In the case of readjustment, the trim joint 53 is pulled out from the upper bolt 42, the lock nut 70 is loosened, and the threaded portion 73c of the front rod 73a constituting the rod 73 is connected to the threaded hole 71 of the neck portion 53b. adjust.
As a result, the length of the so-called trim operation cable 44 can be adjusted.

As described above, the trim joint 53 is configured to be freely inserted and removed from the upper bolt 42 that stands on the trim ring 40, so that the trim operation cable 44 is temporarily fixed to the upper bolt 42 simply by inserting the trim joint 53 into the upper bolt 42. be able to.
Thereby, it is possible to confirm whether or not the length of the trim operation cable 44 is normal in a temporarily fixed state in which only the trim joint 53 is inserted into the upper bolt 42.

For this reason, even when it is necessary to readjust the length of the trim operation cable 44, the trim joint 53 can be easily detached from the upper bolt 42.
Therefore, the trim joint 53 can be extracted from the upper bolt 42 and the length of the trim operation cable 44 can be easily readjusted.

In addition, the trim joint 53 can be arbitrarily rotated by interposing the joint means 74 in the middle of the rod portion 73. Therefore, when the trim joint 53 is rotated by loosening the lock nut 70 of the trim joint 53 and rotating the trim joint 53 to adjust the length of the trim operation cable 44, for example, the sphere 54 of the trim joint 53. May be displaced from the axis of the upper bolt 42.
In this case, the mounting hole 55 of the sphere 54 can be aligned with the axis of the upper bolt 42 by rotating the rear joint portion 77 of the joint means 74.

Next, the reverse bucket 21 (refer FIG. 1, FIG. 2) is demonstrated.
FIG. 6 is a side view showing the main part of the small surface boat according to the present invention.
Left and right support brackets 90 and 91 (see also FIG. 7 for the right support bracket) are provided on the left and right sides of the ride plate 24, and the reverse bucket 21 is swingably attached to the left and right support brackets 90 and 91 in the vertical direction.

  An intermediate lever 93 is disposed at an interval 92 (see FIG. 7) between the left support bracket 90 and the steering nozzle 18, and the intermediate lever 93 is swingably attached to the left support bracket 90. A reverse operation cable 94 is connected to the reverse bucket 21 via the intermediate lever 93, and the reverse operation cable 94 is attached to the reverse operation lever 22.

By swinging the reverse operation lever 22 up and down around the support shaft 22a, the reverse operation cable 94 is operated to swing the intermediate lever 93 about the support bolt 95.
By swinging the intermediate lever 93, the reverse bucket 21 can be swung in the vertical direction around the left and right support bolts 96 (see also FIG. 7 for the right support bolt 96).
Thereby, the reverse bucket 21 can be moved to a forward position P1 above the steering nozzle 18 and a reverse position P2 (position shown) behind the steering nozzle 18.

FIG. 7 is a plan view showing a main part of the small surface boat according to the present invention.
Left and right support brackets 90, 91 are provided on the left and right sides of the ride plate 24, that is, the left and right sides of the steering nozzle 18, and the reverse bucket 21 is attached to the left and right support brackets 90, 91 with left and right support bolts 96, 96 and nuts 98, 98. The storage pocket 99 is formed at the left end of the reverse bucket 21, and the upper end 93 a of the intermediate lever 93 is inserted into the storage pocket 99. Attach to the reverse bucket 21.

Here, when attaching the upper end portion 93 a of the intermediate lever 93 to the storage pocket 99 of the reverse bucket 21 with the mounting bolt 100 and the nut 101, the washer clip 103 (see also FIG. 8) is fitted into the boss 102 of the storage pocket 99.
The washer clip 103 is a member formed in a substantially U-shape and having through holes 104a and 104a formed in two pieces 104 and 104 facing each other.

The washer clip 103 is fitted into the boss 102 of the reverse bucket 21, and the respective through holes 104 a and 104 a of the washer clip 103 are aligned with the mounting hole 102 a of the boss 102.
The protrusion 106a of the slide member 106 is slidably fitted into the guide groove 105 (see also FIG. 6) of the intermediate lever 93. The mounting hole 107 of the slide member 106 is aligned with the mounting holes 102 a and 102 b of the storage pocket 99.

The mounting bolt 100 is inserted into the mounting holes 102a, 107, 102b, and the nut 101 is screwed to the tip of the mounting bolt 100.
The intermediate lever 93 can be attached to the attachment holes 102 a and 102 b of the storage pocket 99 with the attachment bolt 100.

In this way, by fitting the washer clip 103 into the boss 102 of the reverse bucket 21, it is possible to eliminate the need for manually holding the washer during assembly.
Therefore, the assembling work can be simplified, and the intermediate lever 93 can be easily assembled without taking time.

Thus, after the intermediate lever 93 is disposed between the left support bracket 90 and the steering nozzle 18, the intermediate lever 93 is swingably attached to the left support bracket 90 with the support bolt 95.
Then, by connecting the reverse operation cable 94 to the lower end portion 93 b of the intermediate lever 93, the reverse operation cable 94 is arranged along the left side wall of the stator 31.
By operating the reverse operation cable 94 with the reverse operation lever 22 (see FIG. 6), the reverse bucket 21 can be swung up and down around the left and right support bolts 96, 96.

  The reverse bucket 21 connects curved rear walls 112 across the left and right side walls 110 and 111, and left and right injection ports 113 and 114 are formed on the left and right side walls 110 and 111, respectively. Attachment holes 110a and 111a for attachment to the left and right support brackets 90 and 91 are provided, and attachment holes 102a and 102b for attaching the intermediate lever 93 to the storage pocket 99 are provided.

  Here, the small surface boat 10 (see FIG. 1) has an upper bolt on the upper end of the steering nozzle 18 in order to swing the steering nozzle 18 up and down around the left and right bolts 41 and 41 (see FIG. 3). 42, and the trim operation cable 44 is arranged along the upper portion of the stator 31 via the trim joint 53 on the upper bolt 42.

The substantially center of the reverse bucket 21 is located behind the members of the upper bolt 42, the trim joint 53, and the trim operation cable 44.
For this reason, when raising the reverse bucket 21 to the advance position P1 (refer FIG. 6), the center part of the rear wall 112 of the reverse bucket 21 is these members (the upper volt | bolt 42, the trim joint 53, and the trim operation cable 44). It is possible to interfere with.

Therefore, the upper portion 112a of the rear wall 112 of the reverse bucket 21 is configured to be provided with a connecting portion storage recess 115 for avoiding contact with these members (the upper bolt 42, the trim joint 53, and the trim operation cable 44). .
The connecting portion storage recess 115 forms a storage groove 115a that gradually protrudes backward from the rear wall 112 toward the upper end 112b from the central portion 112a of the rear wall 112, and has a bent portion 116 of the rear wall 112. A notch 115 b formed at a position corresponding to the storage groove 115.

The arm 107 is extended outward from the right side wall of the steering nozzle 18, and the steering operation cable 108 is disposed on the arm 107 along the right side wall of the stator 31.
By operating the steering operation cable 108 with the steering handle 19 (see FIG. 1), the steering nozzle 18 can be swung left and right around the upper and lower bolts 42 and 43 (see FIG. 4 for the lower bolt 43). it can.

FIG. 8 is a perspective view showing a reverse bucket of the small surface boat according to the present invention. The connection part accommodation recessed part 115 is demonstrated in detail with this figure.
The connecting portion storage recess 115 is formed by forming a storage groove 115a in the rear wall 112 and forming a notch 115b at the upper end of the storage groove 115a, thereby opening the upper end of the storage groove 115a.
The storage groove 115a extends substantially vertically so that the groove depth gradually increases from the center in the left-right direction of the rear wall 112 and from the substantially vertical center 112a of the rear wall 112 toward the upper end 112b of the rear wall 112. It is a groove.

The notch 115b is formed at the center of the bent portion 116 formed at the upper end of the rear wall 112, that is, at a position corresponding to the storage groove 115a.
Thus, by forming the notch 115b in the center of the bent portion 116, the upper end of the storage groove 115a can be opened.

Next, the process of assembling the steering nozzle of the small surface boat will be described with reference to FIGS.
FIGS. 9A and 9B are first assembly process diagrams illustrating a process of assembling the steering nozzle of the small surface boat according to the present invention to the jet nozzle.
In (a), a washer 57 is fitted into the shaft 46 at the upper end of the trim ring 40, and the washer 63 is set at the lower end of the trim ring 40. In this state, the shaft portion 46 of the trim ring 40 is inserted into the upper mounting hole 49 of the steering nozzle 18.

In (b), the shaft portion 46 of the trim ring 40 is inserted into the upper mounting hole 49 of the steering nozzle 18. Next, the collar 50 is fitted into the gap between the shaft portion 46 of the trim ring 40 and the steering nozzle 18.
Thus, the trim ring 40 can be stored at the front end of the steering nozzle 18.

FIGS. 10A and 10B are second assembly process diagrams illustrating a process of assembling the steering nozzle of the small surface boat according to the present invention to the jet nozzle.
In (a), the upper bolt 42 is inserted into the upper mounting hole 47 at the upper end of the trim ring 40 as shown by the arrow (1) from the inside of the trim ring. Next, the lower bolt 43 is inserted from the inside of the trim ring into the lower mounting hole at the lower end of the trim ring and the lower mounting hole 39 below the steering nozzle 18 as shown by the arrow (2).

In (b), a washer 58 is fitted into the upper bolt 42 protruding from the upper end of the steering nozzle 18 as shown by an arrow (3), and a nut 51 is screwed from above. As a result, the upper bolt 42 can connect the upper end of the trim ring 40 and the upper end of the steering nozzle 18 with the upper bolt 42.
After the nut 51 is screwed to the upper bolt 42, the spacer 52 is fitted into the upper bolt 42 protruding from the nut.

Next, the nut 60 is screwed to the lower bolt 43 as indicated by the arrow (4), so that the lower bolt 43 can connect the lower end of the trim ring 40 and the lower end of the steering nozzle 18 with the lower bolt 43.
Thereby, the trim ring 40 can be connected to the steering nozzle 18 by the upper bolt 42 and the lower bolt 43.
Subsequently, the collars 61 and 61 are inserted into the left and right side attachment holes 45 and 45 (the front side is not shown) of the trim ring 40 from the inside of the trim ring 40 as indicated by arrows (5).

FIGS. 11A and 11B are third assembly process diagrams illustrating a process of assembling the steering nozzle of the small surface boat according to the present invention to the jet nozzle.
In (a), with the trim ring 40 connected to the steering nozzle 18 with the upper bolt 42 and the lower bolt 43, the trim ring 40 is put on the rear end of the jet nozzle 37 as shown by the arrow (6).
In (b), the left and right bolts 41, 41 are inserted into the left and right collars 61, 61 as shown by arrows (7).

12 (a) and 12 (b) are fourth assembly process diagrams for explaining the process of assembling the steering nozzle of the small surface boat according to the present invention to the jet nozzle.
In (a), the positioning pin 67 is inserted into the positioning hole 65 from the insertion groove 66, and the tip of the positioning pin 67 protruding from the positioning hole 65 is inserted into the positioning recess 64.
Thus, the axis 68 of the steering nozzle 18 can be made to coincide with the axis of the jet nozzle 37, that is, the axis 35 of the water jet propulsion machine 17, and the direction of the steering nozzle 18 can be fixed at the reference position.

  In this way, the direction of the steering nozzle 18 can be fixed at the reference position by a simple operation of simply inserting the positioning pin 67 into the positioning hole 65 and the positioning recess 64. Therefore, it is possible to adjust the direction of the steering nozzle 18 without taking time for the regular angle.

  After the positioning pin 67 is inserted into the positioning hole 65 and the positioning recess 64 to fix the direction of the steering nozzle 18 at the reference position, the trim joint 53 is fitted into the upper bolt 42. In this case, even if the length of the trim operation cable 44 is adjusted in advance, it is necessary to readjust the cable length.

  In that case, the trim joint 53 once fitted into the upper bolt 42 is extracted from the upper bolt 42 and rotated as indicated by an arrow to adjust the protruding amount of the trim joint 53. Thereby, the length of the trim operation cable 44 can be adjusted.

Here, when the trim joint 53 is rotated and the length of the trim operation cable 44 is adjusted, for example, the attachment hole 55 of the sphere 54 of the trim joint 53 may be displaced from the axis of the upper bolt 42.
In this case, the trim joint 53 can be arbitrarily rotated by the joint means 74 interposed in the middle of the rod portion 73. That is, the mounting hole 55 of the sphere 54 can be easily aligned with the axis of the upper bolt 42 by rotating the rear joint portion 77 of the joint means 74.

In (b), after adjusting the length of the trim operation cable 44, the trim joint 53 is fitted into the upper bolt 42. Next, the nut 42 is screwed to the upper bolt 42 protruding upward from the trim joint 53, and the trim joint 53 is fixed to the upper bolt 42. Thereby, the length adjustment of the trim operation cable 44 is completed.
Then, after the adjustment of the length of the trim operation cable 44 is completed, the positioning pin 67 is extracted from the positioning hole 65 and the positioning recess 64, and the assembly process of the steering nozzle 18 is completed.

FIG. 13 is a view for explaining the relationship between the upper bolt and trim operation cable and the reverse bucket of the small surface boat according to the present invention.
The reverse bucket 21 is raised from the reverse position P2 to the forward position P1 by pushing the reverse operation lever 22 back from the state of FIG. 6 about the support shaft 22a.

Here, the small surface boat 10 is configured to swing the steering nozzle 18 in the vertical direction as shown by the arrows with the left and right bolts 41 and 41 as axes.
Therefore, the upper bolt 42 is attached to the upper end portion of the steering nozzle 18, and the trim operation cable 44 is disposed along the upper portion of the stator 31 via the trim joint 53.
Therefore, when raising the reverse bucket 21 to the advance position P1, it is possible that the rear wall 112 of the reverse bucket 21 interferes with these members (the upper bolt 42, the trim joint 53, and the trim operation cable 44).

In view of this, the rear wall 112 of the reverse bucket 21 is configured to be provided with a connecting portion housing recess 115 for avoiding contact with these members (the upper bolt 42, the trim joint 53, and the trim operation cable 44).
Accordingly, it is possible to prevent the rear wall 112 of the reverse bucket 21 from interfering with the upper bolt 42 and the trim joint 53 when the reverse bucket 21 is raised to the forward movement position P1.

14 (a) to 14 (c) are diagrams for explaining a propulsion state of the small surface boat according to the present invention.
In general, a small surface boat tends to lift the front portion 12 of the hull 11 when starting. For this reason, there has been a demand for practical use of a small surface boat that can suitably start the small surface boat 10 so that the front portion 12 (that is, the bow) of the hull 11 does not float.
Therefore, the axis 35 of the water jet propulsion machine 17 is set to a downward slope of an angle θ1 with respect to the reference line 36 parallel to the horizontal line during the sliding operation toward the rear of the hull 11. Thereby, an effect as shown to (a) is acquired.

In (a), the steering nozzle 18 is lowered downward with respect to the axis 35 of the water jet propulsion machine 17 by grasping the trim operating lever 20 (see also FIG. 1) when the small surface boat 10 is started.
Accordingly, the jet water 119 is jetted from the steering nozzle 18 downward with respect to the water surface 109.
For this reason, since the force which floats the stern 15 of the hull 11 acts, it tries to lower the front part 12 of the hull 11 as shown by the arrow (9).
Therefore, the small surface boat 10 can be suitably started so that the front portion 12 of the hull 11 does not float when the small surface boat 10 starts.

In (b), by increasing the jet power of the jet water 119, the small surface boat 10 enters a sliding state. When the small surface boat 10 is in a sliding state, the front portion 12 of the hull 11 does not tend to float away from the water surface, so the trim operating lever 20 (see also FIG. 1) is released and the steering nozzle 18 is propelled by water jet. Coaxial with the axis 35 of the machine 17.
Thereby, the force which floats the stern 15 of the hull 11 can be decreased.

Here, as shown in (c), the small surface boat 10 moves the bottom surface 25 of the ride plate 24 with respect to the reference line 36 parallel to the horizontal line during the sliding, as shown in (a). It is set to have an upward slope of angle θ2 toward the rear.
By setting the bottom surface 25 of the ride plate 24 to an upward slope of the angle θ2, the volume (portion indicated by ///) can be reduced as compared with a normal ride plate. Therefore, the buoyancy corresponding to the volume V can be reduced.
For this reason, since the buoyancy of the stern 15 of the hull 11 can be made smaller than the buoyancy of the normal hull, the stern 15 is likely to sink in the direction of the arrow.

Returning to (b), by increasing the jet power of the jet water 119 to bring the small surface boat 10 into a sliding state, the speed of the small surface boat 10 increases and the hull 11 tends to rise from the water surface 109.
At this time, the steering nozzle 18 coincides with the axis 35 of the water jet propulsion machine 17 and is downwardly inclined at an inclination angle of θ1 with respect to the horizontal line 36 (see FIG. 2). For this reason, a force for lifting the stern 15 is generated.
Here, by making the bottom surface 25 of the ride plate 24 ascending at an angle θ2, the stern 15 can be easily lowered downward. For this reason, the front and back of the hull 11 are well lifted from the water surface 109, and the small surface boat 10 can be slid in a suitable posture.

Next, a second embodiment will be described.
FIG. 15 is a main part enlarged view showing a second embodiment of the small surface boat according to the present invention. In the second embodiment, the same members as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
An upper bolt 42 is attached to the trim ring 40 and the steering nozzle 18 with a nut 51, and a spacer 52 is placed on the nut 51. In this state, the trim joint (connecting portion) 120 is attached to the upper bolt 42 protruding from the spacer 52.

  The trim joint 120 has a head portion 122 rotatably connected to a neck portion 121 via a flange 123. The trim hole 120 is attached to the upper bolt 42 by fitting the mounting hole 125 of the sphere 124 provided in the head portion 122 into the upper bolt 42 and screwing the nut 56 to the upper bolt 42 from above the head portion 122.

  After the front end 129 of the trim operation cable 128 is screwed to the screw hole 126 of the neck portion 121, the lock nut 127 is tightened to connect the trim operation cable 128 to the trim joint 120.

  When the length of the trim operation cable 128 is readjusted, the trim joint 120 once fitted into the upper bolt 42 is first extracted from the upper bolt 42. Next, after loosening the lock nut 127, the neck portion 121 is rotated to change the protruding amount of the trim joint 120, and the length of the trim operation cable 128 is adjusted.

Here, when the trim joint 120 is rotated and the length of the trim operation cable 128 is adjusted, for example, the mounting hole 125 of the sphere 124 of the trim joint 120 may be displaced from the axis of the upper bolt 42.
In this case, the mounting hole 125 of the spherical body 124 can be easily aligned with the axis of the upper bolt 42 by arbitrarily rotating only the head portion 122 while the neck portion 121 is stationary. Can be fitted.
Thus, according to the trim joint 120 of the second embodiment, the same effect as the trim joint 53 of the first embodiment can be obtained.

  In the above-described embodiment, the example in which the upper and lower bolts 42 and 43 are used as the upper and lower support shafts for attaching the steering nozzle 18 to the trim ring 40 so as to be swingable in the left-right direction has been described. It is possible to use other members without being limited to 43.

  The small surface boat according to the present invention is suitable for a small surface boat in which a steering nozzle provided at the rear of a water jet propulsion device is configured to be swingable in the left-right direction and the up-down direction.

Side view showing a small surface boat according to the present invention. Sectional drawing which shows the principal part of the small surface boat which concerns on this invention The disassembled perspective view which shows the principal part of the small surface boat which concerns on this invention Sectional drawing which expands and shows the principal part of the small surface boat which concerns on this invention 5 enlarged view of FIG. The side view which shows the principal part of the small surface boat which concerns on this invention The top view which shows the principal part of the small surface boat which concerns on this invention The perspective view which shows the reverse bucket of the small surface boat which concerns on this invention First assembly process diagram for explaining a process of assembling a steering nozzle of a small surface boat according to the present invention to a jet nozzle Second assembly process diagram for explaining the process of assembling the steering nozzle of the small surface boat according to the present invention to the jet nozzle 3rd assembly process diagram explaining the process of assembling the steering nozzle of the small surface boat according to the present invention to the jet nozzle 4th assembly process figure explaining the process of assembling the steering nozzle of the small surface boat which concerns on this invention to a jet nozzle The figure explaining the relationship between the upper bolt of the small surface watercraft which concerns on this invention, a trim operation cable, and a reverse bucket The figure explaining the propulsion state of the small surface boat which concerns on this invention The principal part enlarged view which shows 2nd Embodiment of the small surface boat which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Small surface boat, 11 ... Boat body, 14 ... Engine, 17 ... Water jet propulsion machine (jet propulsion machine), 18 ... Steering nozzle, 35 ... Axis of water jet propulsion machine (axis of jet nozzle), 37 ... Jet Nozzle, 40 ... Trim ring, 41 ... Left and right bolts (left and right support shafts), 42 ... Upper bolt (upper support shaft) 42a ... Upper bolt head (upper bolt head), 43 ... Lower bolt (lower support shaft) 43a ... Lower bolt head (head of lower bolt), 44 ... Trim operation cable, 53 ... Trim joint (connection part), 64 ... Positioning recess (positioning recess), 65 ... Positioning hole (positioning through hole), 66 ... Insertion groove, 67 ... Positioning pin, 68 ... Steering nozzle axis, L1 ... Upper bolt length (upper bolt length), L2 ... Lower bolt length (lower bolt length).

Claims (1)

An engine and a jet propulsion device driven by the engine are arranged in this order in the boat body, and a jet nozzle for injecting jet water backward is provided behind the jet propulsion device, and an annular trim is provided at the rear of the jet nozzle. The ring is attached to the trim ring so that it can swing in the vertical direction, and the steering nozzle is attached to the trim ring so that it can swing in the horizontal direction by using the vertical shaft. It is a small surface boat attached so that it can swing,
Forming an insertion groove at the upper end of the steering nozzle;
Forming a positioning recess in the jet nozzle and forming a positioning through-hole in the trim ring;
By detachably inserting a positioning pin into the insertion groove , the through hole and the positioning recess, the axis of the steering nozzle is matched with the axis of the jet nozzle,
The steering nozzle can be fixed at the trim operation cable adjustment reference position.
A small surface boat characterized by that.

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