JP4303266B2 - Engine mount positioning jig for small planing boat engine and engine mount positioning method for small planing boat engine - Google Patents

Description

  The present invention relates to an engine mount positioning jig for a small planing boat engine and an engine mount positioning method for a small planing boat engine for positioning an engine output shaft at a normal position when the engine is attached to a hull.

As a small planing boat, there is a water jet propulsion boat that attaches a jet pump to the rear of the hull, drives the impeller of the jet pump with the engine, sucks water from the bottom of the boat, and jets the sucked water backward to propel it. Are known.
A jet pump provided in a small planing boat needs to accurately position the stator with respect to the impeller because the impeller rotates at high speed in the stator.

As a personal watercraft configured to accurately position a stator with respect to an impeller, for example, a “jet propulsion unit mounting structure for small boat” in Patent Document 1 is known. This technology includes first and second claw portions on the hull side, first and second stoppers on the stator side, and abuts the first stopper on the first claw portion to position the stator in the vertical direction. Then, the second stopper is brought into contact with the second claw portion to position the stator in the left-right direction (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2000-62688

Thus, in order to rotate the impeller, it is important to attach the stator at a normal position with respect to the impeller. However, in order to transmit the engine power to the impeller, the impeller rotating shaft and the engine output shaft It is also important to arrange them on the same axis.
In order to arrange the rotation shaft of the impeller and the output shaft of the engine coaxially, when the engine is mounted on a hull (a member constituting the lower half of the hull), the engine rotation shaft is The output shaft needs to be aligned. Hereinafter, the alignment of the output shaft of the engine will be described with reference to the following diagram.

  FIG. 25 is an explanatory view showing an example in which an engine is mounted on a conventional personal watercraft. The personal watercraft attaches four engine mounts 151 (two not shown) to the hull 150 and mounts the engine 152 on the hull 150 by attaching the engine 152 to these engine mounts 151. Is done normally.

  The output shaft 153 of the engine 152 is connected to the drive shaft 155 via the front / rear couplings 154a and 154b, and the rear end of the drive shaft 155 is splined to the rotation shaft 157 of the impeller 156, thereby rotating the engine 152. Can be transmitted to the impeller 156.

  Thus, in order to connect the output shaft 153 of the engine 152 and the rotation shaft 157 of the impeller 156 with the drive shaft 155, the output shaft 153 of the engine 152 is arranged coaxially with the rotation shaft 157 of the impeller 156. Thus, it is necessary to align the output shaft 153 of the engine 152.

  For this reason, when assembling the engine 152 to the hull 150, for example, the impeller 156 is first assembled in the stator 158, and then the drive shaft 155 is splined to the rotating shaft 157 of the impeller 156. Next, the engine 152 is suspended by a crane (not shown), and in this state, the engine 152 is adjusted in the up / down direction, the left / right direction, and the front / rear direction, whereby the output shaft 153 of the engine 152 is suitably centered with respect to the drive shaft 155. It is necessary to match.

  Here, in order to align the output shaft 153 of the engine 152 with the drive shaft 155, it is necessary to make fine adjustments while slightly moving the engine 152 in the vertical direction, the horizontal direction, and the front-rear direction. At this time, it is necessary to align the engine 152 with the engine mounts 151 at the same time.

  However, the engine 152 is a heavy load, and the heavy engine 152 is suspended by a crane, and the crane is operated in this state to finely adjust the engine 152 in the vertical direction, the horizontal direction, and the front-rear direction. The operation of simultaneously aligning the shaft 155 and aligning the engine mounts 151 is extremely difficult, and this places an excessive burden on the operator.

  Further, since it is difficult to perform the alignment with the drive shaft 155 and the alignment with the engine mount 151... While hanging the heavy engine 152 with a crane, it takes time to assemble the engine 152 to the hull 150. This hinders the productivity of small planing boats.

  Accordingly, an object of the present invention is to reduce the burden on the operator and further reduce the time for assembling the engine to the hull. It is an object of the present invention to provide an engine mount positioning method.

Claim 1 in order to achieve the above object, an engine lower dummy positioning the engine mount imitates the lower half of the engine for actuating the impeller with the jet pump watercraft, to fix the engine, this A centering shaft for positioning the engine lower dummy, and a pump dummy having a support hole for supporting the centering shaft and attached to a thrust plate for fixing the jet pump. The pump dummy is attached to the thrust plate. in the state, the by inserting the centering shaft support hole, and wherein the Rukoto support the centering shaft rotation axis coaxial with said impeller.
The centering shaft can be arranged coaxially with the rotating shaft of the impeller simply by inserting the centering shaft into the support hole of the pump dummy.
Thus, the centering shaft can be easily incorporated into the pump dummy without taking time.

According to a second aspect of the present invention, the engine lower dummy is configured to be screwed into the engine mount, a frame frame body substantially matched with the vertical and horizontal dimensions of the engine in plan view, a pair of attachment / detachment handles provided on the frame frame body, and the engine mount The front left and right screws when the screws provided at the four corners of the frame frame and the bow side of the four screws are referred to as front left and right screws and the stern side as rear left and right screws, respectively. A front through hole opened in the frame frame at the same center as the center of the crankshaft of the engine, and the frame frame body between the rear left and right screws and at the same center as the center of the crankshaft of the engine. And a rear through hole opened.
By configuring the engine lower dummy with a frame body, the engine lower dummy is a sufficiently lightweight member compared to the engine. According to this lightweight engine lower dummy, the engine mount is temporarily fixed to the hull of a small planing boat, the engine lower dummy is fixed to these engine mounts with screws, and then the engine lower dummy is moved forward. -The engine mount can be positioned in a proper position by arranging the rear through hole coaxially with the crankshaft.
By using the engine lower dummy as a sufficiently lightweight member and using this light engine lower dummy, the engine mount can be easily positioned at the normal position.
According to a third aspect of the present invention, the frame body includes front and rear frames arranged at a predetermined interval in the front and rear direction, a left frame connecting the left ends of the front and rear frames, and right ends of the front and rear frames. A right frame to be coupled, and front left and right screws among the screws provided at the four corners are screwed to the front ends of the left and right frames, respectively. Of the screws provided at the corners, the rear left and right screws are screwed together, and handles are attached to the upper ends of the front left and right screws and the rear left and right screws, respectively. The screws are rotated in the screwing direction or the removing direction.
According to a fourth aspect of the present invention, the thrust plate has an opening for accommodating the impeller of the jet pump at the center, and includes a mounting screw hole for mounting the stator of the jet pump along an outer periphery. The centering shaft can be inserted, and can be inserted into the opening of the thrust plate, and has a screw that can be inserted into the mounting screw hole of the thrust plate.

According to a fifth aspect of the present invention, when the engine is mounted on the hull constituting the hull through the engine mount, the engine lower dummy , the centering shaft, and the pump dummy according to the first aspect are used. In addition, the height is determined, and thereafter, the engine lower dummy is removed, and the engine is mounted thereon.

Since the front and rear, left and right positions and height of the engine mount can be determined using a sufficiently light engine lower dummy , centering shaft and pump dummy, handling of the engine lower dummy becomes easy. Thereby, positioning of an engine mount can be performed easily.
In addition, since the engine mounting time can be shortened by simply positioning the engine mount at the regular position, the productivity of the personal watercraft can be increased.

In the invention according to claim 1, the centering shaft can be arranged coaxially with the rotation shaft of the impeller simply by inserting the centering shaft into the support hole of the pump dummy.
Thus, the centering shaft can be easily incorporated into the pump dummy without taking time.
In the invention according to claim 2, the engine lower dummy is formed of a frame body, so that the engine lower dummy is a member that is sufficiently light compared to the engine. According to this lightweight engine lower dummy, the engine mount is temporarily fixed to the hull of a small planing boat and the engine lower dummy is fixed to these engine mounts with screws. By disposing the rear through hole coaxially with the crankshaft, the engine mount can be positioned at a normal position.

Since the engine lower dummy is a sufficiently lightweight member and the engine lower dummy is used, the engine mount can be easily positioned at a normal position, so that the burden on the operator can be reduced.
In addition, the engine mounting time can be shortened by simply positioning the engine mount at the proper position, so that the productivity of small planing boats can be increased and the cost can be reduced. It becomes possible.
In the invention according to claim 3, the frame body includes front and rear frames arranged at predetermined intervals in the front and rear direction, a left frame connecting the left ends of the front and rear frames, and right ends of the front and rear frames. And a right frame to be connected.
The front left and right screws are respectively screwed to the front ends of the left and right frames, and the rear left and right screws are respectively screwed to the rear ends of the left and right frames.
Handles are attached to the upper ends of the four screws, the front left and right screws and the rear left and right screws, respectively, and each screw is rotated in the screwing direction and the removing direction with these handles.
In the invention according to claim 4, the thrust plate is formed with an opening for accommodating the impeller of the jet pump at the center and provided with a mounting screw hole for mounting the stator of the jet pump along the outer periphery. The pump dummy is configured so that the centering shaft can be inserted, and can be inserted into the opening of the thrust plate, and has a screw that can be inserted into the mounting screw hole of the thrust plate.

In the invention according to claim 5 , since the front and rear, the left and right positions and the height of the engine mount can be determined using the sufficiently light engine lower dummy, the engine lower dummy can be easily handled. Thereby, the positioning of the engine mount can be easily performed without placing a burden on the operator.
In addition, the engine assembly time can be shortened by simply positioning the engine mount at the normal position. Therefore, the productivity of the personal watercraft can be increased, and further, the cost can be reduced.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a side view of a personal watercraft in which an engine is positioned by an engine mount positioning jig according to the present invention.
The personal watercraft 10 is provided with a fuel tank 13 on the bow 11 a side of the hull 11, an engine 15 is provided behind the fuel tank 13, and a jet pump chamber 19 is provided on the stern 11 b side behind the engine 15. The jet pump chamber 19 includes a jet pump 20.

In the jet pump 20, a thrust plate 21 is attached to a wall portion 19 a of the jet pump chamber 19, a stator 22 is attached to the thrust plate 21, and an impeller 23 is rotatably attached to the interior of the stator 22.
The drive shaft 25 is spline-coupled to the rotary shaft 24 of the impeller 23, and the coupler 26a provided at the front end of the drive shaft 25 and the coupler 26b provided at the rear end of the output shaft 27 are connected, whereby the drive shaft 25 is connected to the output shaft. 27.

Therefore, by rotating the output shaft 27 by driving the engine 15, the rotation of the output shaft 27 can be transmitted to the impeller 23 via the drive shaft 25 and the rotation shaft 24.
By rotating the impeller 23, water is sucked from the suction port 12a of the boat bottom 12, and the sucked water is jetted backward from the steering nozzle 28 as a water jet. The small planing boat 10 can be propelled by ejecting a water jet backward from the steering nozzle 28.

Here, when the engine 15 is assembled to the hull 14 constituting the lower half of the hull 11, first, four engine mounts 16 (not shown) are fixed to the hull 14 with bolts 17. The engine 15 is fixed to the engine mounts 16 with bolts 18.
Hereinafter, the work process when attaching the engine 15 to the hull 14 and the jig used when attaching the engine 15 to the hull 14 will be described in detail.

FIG. 2 is a perspective view showing a centering jig (first embodiment) provided with a positioning jig according to the present invention.
A centering jig 30 for a small planing boat engine includes an engine mount positioning jig (hereinafter abbreviated as “positioning jig”) 31 for positioning the engine at a normal position, and positioning using the positioning jig 31. And an inspection jig 35 for inspecting the position of the engine 15 (shown in FIG. 1).

  The positioning jig 31 includes an engine lower dummy 32 for positioning the engine mount 16, a centering shaft 33 for positioning the engine lower dummy 32, and a thrust plate 21 (shown in FIG. 1) for supporting the centering shaft 33. And a pump dummy 34 to be attached.

  On the other hand, the inspection jig 35 includes an inspection pump dummy 36 attached to the thrust plate 21, an inspection shaft 37 supported by the inspection pump dummy 36, and an inspection coupler 38 that can be attached to and detached from the tip 37 a of the inspection shaft 37.

The engine mount 16 has a cylindrical rubber mount 16b attached to a substantially rectangular plate 16a, a screw hole 16c formed in the center of the rubber mount 16b, and mounting holes 16d (shown in FIG. 3) at the front and rear ends of the plate 16a. The mounting member is formed and fixed to the hull 14 by screwing the bolt 17 inserted into the mounting hole 16 d into the hull 14.
The engine mount 16 is configured to be relatively movable with respect to the bolt 17 by forming the hole diameter of the mounting hole 16 d to be relatively larger than the outer diameter of the bolt 17.

  The thrust plate 21 has a substantially rectangular outer shape, a circular opening 21a for accommodating an impeller 23 (shown in FIG. 1) in the center, and a mounting screw hole for mounting the stator 22 along the outer periphery. 21b...

Next, the engine lower dummy 32, the centering shaft 33, and the pump dummy 34 constituting the positioning jig 31 will be described in detail.
The engine lower dummy 32 imitates the lower half of the engine 15 of the personal watercraft 10 (shown in FIG. 1), and includes a frame frame body 41 that substantially matches the vertical and horizontal dimensions of the engine 15 in plan view, Of the four screws 46... Provided at the four corners of the frame frame 41 for screwing into the mount 16, the bow 11 a (see FIG. 1) side is connected to the front left and right screws 46, 46 (hereinafter referred to as the left and right screws 46). In order to facilitate understanding, it will be described as “46a, 46a”), and the stern 11b side will be described as rear left / right screws 46, 46 (hereinafter described as “46b, 46b” for ease of understanding). The front left and right screws 46a and 46a, the front through-hole 47 opened in the frame 41 at the same center as the crankshaft center 15a (see FIG. 1) of the engine 15, and the rear left and right Between the screws 46b and 46b, A rear through hole 48 opened in the frame frame body 41 at the same center as the crankshaft center 15a of the gin 15 and larger in diameter than the front through hole 47, and a pair of handles 49, 49 provided in the frame frame body 41. .

  As described above, the main component of the engine lower dummy 32 is the frame frame 41, so that the engine lower dummy 32 can have a simple configuration. Therefore, the engine lower dummy 32 can be made sufficiently lighter than the engine 15 (shown in FIG. 1), so that the engine lower dummy 32 can be easily handled.

  The frame body 41 has the front and rear frames 42 and 43 arranged at a predetermined interval, the left ends of the front and rear frames 42 and 43 are connected by the left frame 44, and the right ends of the front and rear frames 42 and 43 are connected. It is a member formed in a substantially rectangular shape in plan view by being connected by the right frame 45.

  Front left and right screws 46a and 46a (the back side is not shown) are screwed to the front ends of the left and right frames 44 and 45, respectively, and rear left and right screws 46b and 46b are respectively attached to the rear ends of the left and right frames 44 and 45, respectively. 46b is screwed, and handles 51 are attached to the upper ends of the front left / right screws 46a, 46a and the rear left / right screws 46b, 46b.

  By turning these handles 51 clockwise, the front left / right screws 46a, 46a and the rear left / right screws 46b, 46b are screwed into the screw holes 16c of the respective engine mounts 16 ... 32 can be attached to the engine mounts 16.

On the other hand, by turning the handle 51 counterclockwise and removing the front left / right screws 46a, 46a and the rear left / right screws 46b, 46b from the screw holes 16c of the respective engine mounts 16 ... The dummy 32 can be removed from the engine mounts 16.
When attaching / detaching the engine lower dummy 32 to / from the engine mounts 16..., The attaching / detaching work can be easily performed by using the handles 49, 49 attached to the front and rear frames 42, 43.

In addition, the peripheral wall of the front through hole 47 formed in the front frame 42 is provided with grooves 47 on the top, bottom, left and right, and the peripheral wall of the rear through hole 48 formed in the rear frame 43 is the same as the peripheral wall of the front through hole 47. Are provided with grooves 48a on the top, bottom, left and right.
Further, the front frame 42 includes a locking means 52 below the front through hole 47. The locking means 52 is configured such that the locking claws 54, 54 can protrude and retract from the upper surface of the case 53. By locking the locking claws 54 in the annular groove 65 of the centering shaft 33, the engine lower dummy 32 can be positioned at a normal position in the front-rear direction.

The pump dummy 34 includes a dummy main body 56 that gradually increases in diameter from the front end toward the rear end, and includes a rectangular rear wall 57 at the rear end of the dummy main body 56, and is centered on the rear wall 57 and the dummy main body 56. The shaft 33 is configured to be insertable, and a lock member 58 that locks the centering shaft 33 is provided at the center of the rear wall 57, and screws 59 and 59 are provided at corners (two opposing positions) of the rear wall 57.
The dummy body 56 is configured so that its outer shape can be inserted into the opening 21 a of the thrust plate 21, and the screws 59, 59 are arranged to be inserted into the mounting screw holes 21 b, 21 b of the thrust plate 21.

These screws 59, 59 are integrally provided with handles 61, 61, respectively. The pump dummy 34 can be attached to the thrust plate 21 by rotating the handles 61, 61 clockwise and screwing the pair of screws 59, 59 into the attachment screw holes 21b, 21b.
On the other hand, the pump dummy 34 can be removed from the thrust plate 21 by rotating these handles 61, 61 counterclockwise to remove the pair of screws 59, 59 from the mounting screw holes 21b, 21b.

The centering shaft 33 is formed in a cylindrical shape by a small-diameter portion 63, a first large-diameter portion 64, an annular groove 65, a second large-diameter portion 66, and a third large-diameter portion 67 in order from the tip, and this third large-diameter portion. A semi-circular flange 68 that can be fitted to the lock member 58 is provided in the vicinity of the end portion 67, and a mesh pattern is formed on the surface of the grip portion 69 behind the flange 68.
By forming a mesh pattern on the surface of the grip portion 69, the grip portion 69 can be easily gripped, and the centering shaft 33 can be easily handled.

Next, the inspection pump dummy 36, the inspection shaft 37, and the inspection coupler 38 constituting the inspection jig 35 will be described in detail.
The inspection pump dummy 36 includes a cylindrical dummy main body 71 that gradually increases in diameter from the front end toward the rear end, and includes a rectangular flange portion 72 at the rear end of the dummy main body 71. 71, the inspection shaft 37 can be inserted, a lock member 73 for locking the inspection shaft 37 is provided at the center of the flange portion 72, and screws 74, 74 are provided at opposite corner portions (two opposite portions) of the flange portion 72. Prepare.
The dummy main body 71 is configured so that its outer shape can be inserted into the opening 21 a of the thrust plate 21, and the screws 74 and 74 are arranged to be inserted into the mounting screw holes 21 b and 21 b of the thrust plate 21.

These screws 74 and 74 are each provided with a handle 75 integrally therewith. The inspection pump dummy 36 can be attached to the thrust plate 21 by rotating the handles 75, 75 clockwise and screwing the pair of screws 74, 74 into the attachment screw holes 21b, 21b.
On the other hand, the inspection pump dummy 36 can be removed from the thrust plate 21 by rotating the handles 75 and 75 counterclockwise to remove the pair of screws 74 and 74 from the mounting screw holes 21b and 21b.

  The inspection shaft 37 is formed with a lock hole 77 for locking the inspection coupler 38 at the tip, a lock pin 78 is projected in the vicinity of the base end perpendicular to the inspection shaft 37, and a grip portion 79 is provided behind the lock pin 78. A mesh pattern is formed on the surface of the grip portion 79.

By forming a mesh pattern on the surface of the grip portion 79, the grip portion 79 can be easily gripped, and the inspection shaft 37 can be easily handled.
The inspection coupler 38 includes a coupler main body 81 that can be fitted into the inspection shaft 37, and the coupler main body 81 includes a handle 82.

Next, the operation of the centering jig 30 will be described. First, the operation of the positioning jig 31, that is, the engine mount positioning method of the small planing boat engine according to the present invention will be described with reference to FIGS.
FIGS. 3A and 3B are views for explaining an example in which an engine lower dummy is attached to an engine mount in the engine mount positioning method for a small planing boat engine according to the present invention. 2A shows a cross section taken along line 3 (a) -3 (a) in FIG.

  In (a), four engine mounts 16 (hereinafter only two on the back side are shown) are placed at predetermined positions on the hull 14, and bolts 17, 17 are attached to the mounting holes 16d, 16d of the plate 16a. Insert the bolts 17 and 17 into the hull 14. At this time, by screwing the bolt 17 halfway, a gap is formed between the head of the bolt 17 and the plate 16a so that the engine mount can be moved in the vertical direction.

Further, by forming the mounting hole 16d of the plate 16a to be relatively large with respect to the diameter of the bolt 17, the plate 16a can be moved in the horizontal direction (particularly in the front-rear and left-right directions).
Next, the engine lower dummy 32 is lowered, and the front left / right screws 46a, 46a (only the back side is shown) and the rear left / right screws 46b, 46b (only the back side are shown) are respectively mounted on the engine mounts 16. Are inserted into the screw holes 16c as shown by the arrow (1).

In (b), by turning the handle 51 in the clockwise direction, the front left / right screws 46a, 46a and the rear left / right screws 46b, 46b are screwed into the screw holes 16c of the respective engine mounts 16 ... The engine lower dummy 32 is attached to the engine mounts 16.
Here, since the engine lower dummy 32 is formed to be sufficiently light compared to the engine 15 (see FIG. 1), the engine lower dummy 32 can be easily attached to the engine mounts 16.

4A and 4B are views for explaining an example in which a pump dummy is accommodated in the suction port in the engine mount positioning method according to the present invention.
In (a), the thrust plate 21 is brought into contact with the wall 19a as shown by an arrow, a bolt (not shown) is inserted into the mounting hole of the thrust plate 21 into the wall 19a of the jet pump chamber 19, and the inserted bolt is inserted into the wall 19a. Then, the thrust plate 21 is fixed to the wall portion 19a.
In (b), the pump dummy 34 is accommodated in the suction port 12a from the opening 21a of the thrust plate 21 as shown by the arrow (2).

FIG. 5 is a view for explaining an example in which a pump dummy is fixed to a thrust plate in the engine mount positioning method according to the present invention.
Screws 59 and 59 (only the upper side is shown) of the pump dummy 34 are inserted into the mounting screw holes 21b of the thrust plate 21, and the handle 61 is rotated clockwise to screw the screws 59 into the mounting screw holes 21b. 34 is attached to the thrust plate 21.

The pump dummy 34 can be attached to the thrust plate 21 with high accuracy by using the knock pins 59a (see FIG. 6) before the screws 59 are screwed into the attachment screw holes 21b.
After fixing the pump dummy 34 to the thrust plate 21 in this way, the centering shaft 33 is inserted into the pump dummy 34 as shown by the arrow.

FIG. 6 is a view for explaining an example of checking the deviation of the front and rear part through-holes with respect to the centering shaft in the engine mount positioning method according to the present invention.
By inserting the centering shaft 33 into the pump dummy 34, the small-diameter portion 63 of the centering shaft 33 is fitted into the front through hole 47, and the second large-diameter portion 66 is fitted into the rear through-hole 48. The diameter portion 67 is fitted into the support holes 56a, 56b, 56c of the pump dummy 34.

Here, the support holes 56a to 56c of the pump dummy 34 are formed so as to be positioned coaxially with the rotating shaft 24 of the impeller 23 shown in FIG. 1, and the diameters of the support holes 56a, 56b, and 56c of the pump dummy 34 are set. The diameter of the third large diameter portion 67 was set slightly larger.
Therefore, the pump dummy 34 can support the centering shaft 33 coaxially with the rotating shaft 24 of the impeller 23.

  Thus, the centering shaft 33 can be disposed coaxially with the rotating shaft 24 of the impeller 23 by simply inserting the centering shaft 33 into the support holes 56a to 56c of the pump dummy 34. It can be easily incorporated into the pump dummy 34 without taking time.

  On the other hand, the front through-hole 47 and the rear through-hole 48 of the engine lower dummy 32 are formed coaxially with the crankshaft center 15a of the engine 15 (shown in FIG. 1), and the hole diameter of the front through-hole 47 is reduced to the small diameter portion 63 The diameter of the rear through hole 48 was set to be relatively larger than the diameter of the second large diameter portion 66.

In this state, the gauge block 85 is inserted into the upper groove 47a (see also FIG. 2) of the front through hole 47 as shown by the arrow (3). The gauge block 85 has a plurality of steps on the upper surface, and when the gauge block 85 is inserted into the upper groove 47a as indicated by the arrow (3), the entry of the gauge block 85 stops at the step 85a as an example.
After the entry of the gauge block 85 stops, the gauge block 85 is extracted from the upper groove, and the displacement of the front through hole 47 with respect to the centering shaft 33 (hereinafter referred to as “front displacement”) from the value of the stepped portion 85a where the entry has stopped. Confirm).

Similarly, the gauge block 85 is inserted into the upper groove 48a (see also FIG. 2) of the rear through hole 48 as shown by the arrow (4). When the gauge block 85 is inserted into the upper groove 48a as shown by the arrow (3), the entry of the gauge block 85 stops at the step 85a as in the case where the gauge block 85 is inserted into the upper groove 47a of the front through hole 47. To do.
After the entry of the gauge block 85 is stopped, the gauge block 85 is extracted from the upper groove 48a, and the displacement of the rear through hole 48 with respect to the centering shaft 33 (hereinafter referred to as “rear displacement”) is determined from the value of the stepped portion 85a where the entry has stopped. ").

FIG. 7 is a view for explaining an example in which the centering shaft is pushed into the bow side in the engine mount positioning method according to the present invention.
In order to correct the front side deviation obtained by the gauge block 85, a front shim 87 having a shim thickness S1 corresponding to the front side deviation is selected. Next, the front engine mount 16 is lifted, and the front shim 87 is inserted between the front engine mount 16 and the hull 14.
Thereby, the front side engine mount 16 can be positioned at a regular height.

In order to correct the rear shift obtained by the gauge block 85, the rear shim 88 of the shim thickness S2 corresponding to the rear shift is selected. Next, the rear engine mount 16 is lifted, and the rear shim 88 is inserted between the rear engine mount 16 and the hull 14.
As a result, the rear engine mount 16 can be positioned at a regular height.

After the front and rear engine mounts 16 are positioned at regular heights, the centering shaft 33 is pushed toward the bow as shown by the arrow while the engine lower dummy 32 is slightly displaced in the left-right direction.
Here, since the engine lower dummy 32 is formed to be sufficiently light compared to the engine 15 (see FIG. 1), the engine lower dummy 32 can be easily displaced.
The reason why the engine lower dummy 32 is slightly displaced in the left-right direction when the centering shaft 33 is pushed into the bow side will be described in detail with reference to FIG.

FIG. 8 is a view for explaining an example of rotating a centering shaft in the engine mount positioning method according to the present invention.
By pushing the centering shaft 33 toward the bow, the semicircular flange 68 of the centering shaft 33 moves to the position of the lock groove 58a of the lock member 58. In this state, the grip portion 69 of the centering shaft 33 is gripped, and the centering shaft 33 is rotated within a range of 90 to 180 ° as indicated by an arrow.

FIG. 9 is a view for explaining an example in which the centering shaft is positioned at a normal position in the engine mount positioning method according to the present invention.
By rotating the centering shaft 33 in the range of 90 to 180 ° as shown by the arrow, the flange 68 (semi-arc-shaped flange) of the centering shaft 33 is fitted into the lock groove 58a (semi-arc-shaped groove) of the lock member 58. To do.
Thereby, the centering shaft 33 can be positioned in a regular position with respect to the front-rear direction.

  In this way, the centering shaft 33 can be positioned at a normal position with respect to the front-rear direction only by rotating the centering shaft 33 and fitting the flange 68 into the lock groove 58a. The positioning operation in the front-rear direction can be easily performed.

FIG. 10 is a view for explaining an example of positioning the engine mount in the left-right direction in the engine mount positioning method according to the present invention.
By fitting the flange 68 of the centering shaft 33 into the lock groove 58 a of the lock member 58, the first large diameter portion 64 of the centering shaft 33 is fitted into the front through hole 47, and Three large diameter portions 67 are fitted into the rear through holes 48.

Here, the reason why the engine lower dummy 32 is slightly shifted in the left-right direction when the centering shaft 33 is pushed into the bow side will be described in detail.
That is, the hole diameter of the front through hole 47 is set slightly larger than the diameter of the first large diameter part 64, and the hole diameter of the rear through hole 48 is set slightly smaller than the diameter of the third large diameter part 64. Therefore, even if the engine lower dummy 32 is slightly shifted in the left-right direction, it is difficult to push the centering shaft 33 into the bow side.

Therefore, by slightly shifting the engine lower dummy 32 in the left-right direction, the front through hole 47 and the rear through hole 48 are arranged coaxially with respect to the centering shaft 33 so that the centering shaft 33 is placed on the bow side. Can be pushed into.
In this way, the front and rear engine mounts 16 are slightly displaced in the left-right direction so that the front through hole 47 and the rear through hole 48 are coaxial with the centering shaft 33. Can be positioned at regular positions with respect to the left-right direction.
Therefore, the front and rear engine mounts 16 can be easily positioned at regular positions in the left-right direction.

  After the pushing of the centering shaft 33 to the bow side is completed, the engine lower dummy 32 is slightly displaced in the front-rear direction. The reason why the engine lower dummy 32 is slightly displaced in the front-rear direction will be described in detail with reference to the next drawing.

FIG. 11 is a view for explaining an example of positioning the engine mount with respect to the front-rear direction in the engine mount positioning method for a small planing boat engine according to the present invention.
The locking means 52 provided in the engine lower dummy 32 has a slide block 53 a attached to a case 53 so as to be movable in the vertical direction, and a compression spring 55 is disposed between the slide block 53 a and the case 53. Accordingly, the pair of locking claws 54, 54 provided on the upper end of the slide block 53 a can be protruded upward from the upper surface of the case 53 by the urging force of the compression spring 55.

  By projecting the pair of locking claws 54, 54 upward, when the engine lower dummy 32 is in a normal position with respect to the front-rear direction, the pair of locking claws 54, 54 are formed in an annular shape of the centering shaft 33. Enter the groove 65.

  However, when the engine lower dummy 32 is not in a normal position with respect to the front-rear direction, the pair of locking claws 54 and 54 are displaced from the annular groove 65 of the centering shaft 33. Therefore, the engine lower dummy 32 is slightly shifted in the front-rear direction to finely adjust the pair of locking claws 54 and 54 to match the annular groove 65 of the centering shaft 33, and the pair of locking claws 54 and 54. Is fitted into the annular groove 65 by the urging force of the compression spring 55.

In this way, the engine lower dummy 32 is slightly shifted in the front-rear direction and finely adjusted so that the locking claws 54 of the locking means 52 are fitted into the annular groove 65 of the centering shaft. The engine mounts 16 can be positioned at regular positions with respect to the front-rear direction.
Therefore, the front and rear engine mounts 16 can be easily positioned at regular positions in the front-rear direction.

FIG. 12 is a view for explaining an example in which the engine mount is fixed to the hull in the engine mount positioning method according to the present invention.
7, the front and rear engine mounts 16 are positioned at regular heights by the front and rear shims 87 and 88, respectively, and in FIG. 10, the front and rear engine mounts 16 are regular positions with respect to the left-right direction. In FIG. 11, the front and rear engine mounts 16 were positioned at regular positions in the front-rear direction.
Thus, the front and rear engine mounts 16 can be positioned at regular positions. In this state, the front and rear engine mounts 16 are fixed to the hull 14 by tightening the bolts 17.

FIGS. 13A and 13B are views for explaining an example in which the engine lower dummy is removed in the engine mount positioning method according to the present invention.
In (a), the centering shaft 33 is extracted from the pump dummy 34 as shown by the arrow (5). Next, the knock pin 59a (see FIG. 6) is removed from the pump dummy 34, and the handle 61 of the pump dummy 34 is rotated counterclockwise to remove the screw 59 from the mounting screw hole 21b of the thrust plate 21. In this state, the pump dummy 34 is removed from the thrust plate 21 as indicated by an arrow.

  In (b), the front and rear screws 46a and 46b are removed from the screw holes 16c and 16c of the engine mounts 16 and 16 by rotating the handle 51 of the engine lower dummy 32 counterclockwise. Next, the engine lower dummy 32 is removed from the engine mounts 16 and 16 by grasping the handles 49 and 49 (shown in FIG. 2) of the engine lower dummy 32 and lifting the engine lower dummy 32 as indicated by an arrow.

FIG. 14 is a view for explaining an example in which the engine is mounted in the engine mount positioning method according to the present invention.
The engine 15 is mounted on the front and rear engine mounts 16 that are positioned at regular positions. Next, the bolts 18 are screwed into the front and rear engine mounts 16 to fix the engine 15 to the front and rear engine mounts 16.
Thus, the engine 15 can be fixed to the hull 14 via the front and rear engine mounts 16.

Here, by fixing the engine 15 to the front and rear engine mounts 16 positioned at the regular positions, the coupler 26b provided on the output shaft 27 of the engine 15 is disposed at the regular position with respect to the thrust plate 21. be able to.
As described above, the positioning operation using the positioning jig 31 (see FIG. 2) is completed by attaching the engine 15 to the front and rear engine mounts 16.

  When the jet pump 20 (shown in FIG. 1) is attached to the thrust plate 21 by attaching the engine 15 to a regular position, the rotary shaft 24 of the impeller 23 provided in the jet pump 20 is used as the output shaft 27 of the engine 15. On the other hand, it can arrange | position on the same axis | shaft.

The engine mount positioning method of the small planing boat engine shown in FIGS. 3 to 14 described above is shown in the flowchart of FIG. 15, and the engine mount positioning method will be briefly described again for easy understanding.
FIG. 15 is a flowchart for explaining an engine mount positioning method according to the present invention, and STxx in the figure indicates a step number.
ST10 (see FIG. 3): The engine mounts 16 are temporarily fixed to the hull 14 so as to be movable in the vertical direction, the front-rear direction, and the horizontal direction, and the engine lower dummy 32 is attached to the temporarily fixed engine mounts 16.

  ST11 (see FIGS. 4 to 5); A thrust plate 21 is attached to the wall 19a of the jet pump chamber 19, a pump dummy 34 is attached to the thrust plate 21, and a centering shaft 33 is inserted into the pump dummy 34.

  ST12 (see FIG. 6); Insert the gauge block 85 into the upper groove 47a of the front through hole 47 so as to confirm the front side displacement of the front through hole 47 with respect to the centering shaft 33. Next, the gauge block 85 is inserted into the upper groove 48 a of the rear through hole 48, and the rear shift of the rear through hole 48 with respect to the centering shaft 33 is confirmed.

ST13 (see FIG. 7): A front shim 87 is inserted between the front engine mount 16 and the hull 14, thereby correcting the front shift and positioning the front engine mount 16 at a normal height.
Next, the rear shim 88 is inserted between the rear engine mount 16 and the hull 14, thereby correcting the rear shift and positioning the rear engine mount 16 at a normal height.

  ST14 (see FIGS. 8 to 11): Position the front and rear engine mounts 16 in the normal position with respect to the left-right direction, and further position the front and rear engine mounts 16 in the normal position with respect to the front-rear direction. Position.

  ST15 (see FIG. 12): The front and rear engine mounts 16 are fixed to the hull 14 by tightening the bolts 17 with the front and rear engine mounts 16 positioned at regular positions.

  ST16 (see FIG. 13): The pump dummy 34 and the centering shaft 33 are removed from the hull 14, and the engine lower dummy 32 is removed from the engine mount 16.

  ST17 (see FIG. 14): By mounting the engine 15 on the engine mounts 16..., The coupler 26b provided on the output shaft 27 of the engine 15 can be disposed at a normal position.

As described above, according to the positioning jig 31 and positioning method for a small planing boat engine, the engine mounts 16 are temporarily fixed to the hull 14 so that the engine mounts 16 can move freely. The engine mounts 16 can be positioned at regular positions by fixing the screws 32 and moving the engine lower dummy 32.
After the engine mounts 16 are positioned at the proper positions, the engine lower dummy 32 is removed from the engine mounts 16 and the engine 15 is fixed to the engine mounts 16 so that the engine 15 can be attached at the proper positions.

Since the engine lower dummy 32 is a sufficiently lightweight member, and the engine lower dummy 32 is used, the engine mounts 16 can be easily positioned at regular positions, so that the burden on the operator can be reduced.
In addition, by simply positioning the engine mounts 16 at regular positions, the assembly time of the engine 15 can be shortened, so that the productivity of the personal watercraft 10 can be increased and the cost can be reduced. It is also possible to plan.

Next, the operation of the inspection jig 35 will be described with reference to FIGS.
FIG. 16 is a first operation explanatory view of the inspection jig used after the positioning jig according to the present invention.
The inspection pump dummy 36 is accommodated in the suction port 12a through the opening 21a of the thrust plate 21, and screws 74, 74 (only the upper side is shown) of the inspection pump dummy 36 are inserted into the mounting screw holes 21b of the thrust plate 21, and the handle 75 The inspection pump dummy 36 is attached to the thrust plate 21 by rotating the screw clockwise to screw the screw 74 into the attachment screw hole 21b.

  The inspection pump dummy 36 can be attached to the thrust plate 21 with high accuracy by using the knock pins 74a (see FIG. 17) before the screws 74 are screwed into the attachment screw holes 21b.

  Thus, after fixing the inspection pump dummy 36 to the thrust plate 21, the inspection shaft 37 is inserted into the inspection pump dummy 36. By inserting the inspection shaft 37 into the inspection pump dummy 36, the inspection shaft 37 is fitted into the support holes 71 a, 71 b, 71 c of the inspection pump dummy 36.

Here, the support holes 71a to 71c of the inspection pump dummy 36 are formed so as to be coaxial with the rotation shaft 24 of the impeller 23 shown in FIG. 1, and the support holes 71a, 71b, 71c of the inspection pump dummy 36 are formed. The hole diameter was set slightly larger than the diameter of the inspection shaft 37.
Therefore, by inserting the inspection shaft 37 into the support holes 71 a, 71 b, 71 c of the inspection pump dummy 36, the inspection shaft 37 can be supported coaxially with the rotating shaft 24 of the impeller 23 by the inspection pump dummy 36.

  Thus, the inspection shaft 37 can be arranged coaxially with the rotating shaft 24 of the impeller 23 by simply inserting the inspection shaft 37 into the support holes 71a, 71b, 71c of the inspection pump dummy 36. It can be easily incorporated into the pump dummy 34 without taking time.

  Next, the inspection coupler 38 is fitted into the tip 37a of the inspection shaft 37 as shown by the arrow (6). Subsequently, the grip portion 79 of the inspection shaft 37 is grasped and the inspection shaft 37 is pushed in as indicated by the arrow (7). As a result, the lock pin 78 passes through the gate 73b and is disposed at the same position as the lock groove 73a.

In this embodiment, after the seal 89 is attached to the wall surface 12b of the suction port 12a of the hull 14, the diameter of the inspection shaft 37 is determined in accordance with the seal 89 in order to use the inspection jig 35. Since the diameter of 37 is smaller than the diameter of the centering shaft 33 (shown in FIG. 2), a test pump dummy 36 is newly prepared separately from the pump dummy 34 (shown in FIG. 2).
However, if the inspection jig 35 is used before the seal 89 is attached to the wall surface 12b of the suction port 12a, the pump dummy 34 can be used in combination with the inspection pump dummy 36.

FIG. 17 is a second operation explanatory view of the inspection jig used after the positioning jig according to the present invention.
In a state where the lock pin 78 passes through the gate 73b and is disposed at the same position as the lock groove 73a, the inspection shaft 37 is rotated in the clockwise direction as indicated by the arrow (8) to lock the lock pin 78 to the lock member 73. Fit into the groove 73a. When the inspection shaft 37 is rotated approximately 90 ° in the clockwise direction as indicated by the arrow (8), the lock pin 78 comes into contact with the stopper bolts 76 and 76.

FIG. 18 is a third operation explanatory view of the inspection jig used after the positioning jig according to the present invention.
By fitting the lock pin 78 into the lock groove 73a of the lock member 73, the inspection shaft 37 can be positioned at a normal position with respect to the front-rear direction.
In this way, the inspection shaft 37 can be positioned at a normal position with respect to the front-rear direction simply by rotating the inspection shaft 37 and fitting the lock pin 78 into the lock groove 73a. Positioning work in the direction can be easily performed.

  An inspection coupler 38 is fitted into the tip 37 a of the inspection shaft 37. Hereinafter, the inspection coupler 38 is used to inspect whether or not the coupler 26b of the output shaft 27 is disposed at a regular position.

FIGS. 19A to 19C are explanatory views of a fourth action of the inspection jig used after the positioning jig according to the present invention.
In (a), by grasping the handle 82 of the inspection coupler 38 and moving the inspection coupler 38, the positioning pin 82 a provided at the tip of the handle 82 is aligned with the lock hole 77 of the inspection shaft 37.
Next, the lock screw 82 b is screwed into the coupler main body 81 by rotating the handle 82 in the clockwise direction. As a result, the handle 82 is lowered as shown by the arrow (9).

In (b), the positioning pin 82 a of the handle 82 is fitted into the lock hole 77 of the inspection shaft 37. Thereby, the position of the inspection coupler 38 in the front-rear direction with respect to the inspection shaft 37 can be accurately determined.
In addition, since the inspection shaft 37 is disposed at a normal position with respect to the front-rear direction by fitting the lock pin 78 into the lock groove 73a, the inspection coupler 38 is disposed at a predetermined inspection position with respect to the front-rear direction. be able to.

  In this state, the distance S between the rear end of the coupler 26b of the output shaft 27 and the front end of the coupler main body 81 of the inspection coupler 38 is measured. When the interval S matches the specified value, it is confirmed that the rear end of the coupler 26b of the output shaft 27 is disposed at a normal position.

  Here, the position of the inspection coupler 38 in the front-rear direction can be accurately determined by simply inserting the positioning pin 82a of the handle 82 into the lock hole 77 of the inspection shaft 37. It can be easily inspected without trouble that the rear end of the coupler 26b of the output shaft 27 is disposed at a normal position with respect to the front-rear direction.

  After confirming that the rear end of the coupler 26 b of the output shaft 27 is positioned at a normal position with respect to the front-rear direction, the handle 82 is rotated counterclockwise to extract the positioning pin 82 a from the lock hole 77.

In (c), by moving the handle 82 to the coupler 26b of the output shaft 27 as shown by the arrow, the coupler main body 81 of the inspection coupler 38 is also moved as shown by the arrow, and the annular portion 81a of the coupler main body 81 is moved to the coupler of the output shaft 27. 26b.
The inner diameter of the annular portion 81a is set slightly larger than the outer diameter of the coupler 26b. In addition, as described above, the inspection shaft 37 is disposed coaxially with the rotary shaft 24 (shown in FIG. 1) of the jet pump 20.

Therefore, if the annular portion 81a can be fitted to the coupler 26b, it can be confirmed that the coupler 26b of the output shaft 27 is disposed coaxially with the rotary shaft 24 of the jet pump 20.
Here, it is possible to confirm that the coupler 26b of the output shaft 27 is arranged coaxially with the rotary shaft 24 of the jet pump 20 by simply fitting the annular portion 81a to the coupler 26b. Inspection work can be done easily without any effort.

  Thus, after confirming that the coupler 26b of the output shaft 27 is disposed at a normal position with respect to the front-rear direction and is disposed coaxially with the rotating shaft 24 of the jet pump 20, the inspection coupler 38, the inspection shaft The inspection operation using the inspection jig 35 (see FIG. 2) is completed by removing the inspection pump 37 and the inspection pump dummy 36 from the hull.

By the way, since rubber mounts are used as the engine mounts 16..., The engine mounts 16 are compressed by the weight of the engine 15 (100 kg as an example) and the engine 15 is slightly lowered. May not be confirmed to be arranged coaxially with the rotary shaft 24 of the jet pump 20.
In this case, a height of the engine 15 is adjusted by inserting a shim between the upper surface of the engine mounts 16 and the engine 15.

  Since the compression amount of the engine mounts 16 when the engine 15 is mounted on the engine mounts 16 can be predicted from the spring constant of the rubber used for the engine mounts 16, an adjustment shim is mounted. It can also be attached in advance.

  After the inspection work using the inspection jig 35 (see FIG. 2) is completed in this way, the jet pump 20 is attached to the thrust plate 21 as shown in FIG. 1, and the drive shaft 25 is attached to the rotary shaft 24 of the jet pump 20. Are coupled by spline, and the coupler 26a of the drive shaft 25 is coupled to the coupler 26b of the output shaft 27, whereby the operation of coupling the jet pump 20 to the engine 15 is completed.

The operation of the inspection jig 35 shown in FIGS. 16 to 19 described above is shown in the flowchart of FIG. 20, and the operation of the inspection jig 35 will be briefly described again for easy understanding.
FIG. 20 is a flowchart for explaining the procedure for inspecting the engine output shaft with the inspection jig used after the positioning jig according to the present invention, and STxx in the figure indicates a step number.

  ST20 (first half of FIG. 16): The inspection pump dummy 36 is attached to the thrust plate 21, and the inspection shaft 37 is inserted into the inspection pump dummy 36, thereby supporting the inspection shaft 37 coaxially with the rotating shaft 24 of the impeller 23.

  ST21 (second half of FIG. 16): The inspection coupler 38 is fitted into the tip 37a of the inspection shaft 37.

  ST22 (see FIGS. 17 to 18); By fitting the lock pin 78 into the lock groove 73a of the lock member 73, the inspection shaft 37 is positioned at a normal position in the front-rear direction.

  ST23 (see FIG. 19A to FIG. 19B); the rear end of the coupler 26b provided on the output shaft 27 of the engine 15 is arranged at a normal position with respect to the front-rear direction using the inspection coupler 38. Make sure.

  ST24 (see FIG. 19B): Using the inspection coupler 38, it is confirmed that the coupler 26b provided on the output shaft 27 of the engine 15 is arranged coaxially with the rotary shaft 24 of the jet pump 20.

  As described above, according to the inspection jig 35, the inspection pump dummy 36 is attached to the thrust plate 21 fixed to the hull 14, and the inspection shaft 37 is inserted into the support holes 71a, 71b, 71c of the inspection pump dummy 36. The inspection shaft 37 is arranged coaxially with the rotary shaft 24 of the jet pump 20, and an inspection coupler 38 is fitted into the inspection shaft 37, and the deviation of the engine output shaft 27 is inspected using the inspection coupler 38.

In this way, the inspection shaft 37 can be simply arranged coaxially with the rotating shaft 24 of the jet pump 20 simply by inserting the inspection shaft 37 through the inspection pump dummy 36. In addition, only by operating the inspection coupler 38. Since the displacement of the engine output shaft 27 can be inspected, the displacement of the engine output shaft 27 can be easily inspected without taking time and effort.
Therefore, the burden on the operator can be reduced, and in addition, the productivity can be increased and the cost can be reduced.

Next, 2nd-5th embodiment of the centering jig | tool 30 is described based on FIGS. In the second to fifth embodiments, the same members as those of the centering jig 30 of the first embodiment are denoted by the same reference numerals and description thereof is omitted.
FIG. 21 is a sectional view showing a centering jig (second embodiment) provided with an engine mount positioning jig according to the present invention.
The centering jig 90 of the second embodiment includes an engine mount positioning jig (hereinafter abbreviated as “positioning jig”) 91 instead of the positioning jig 31.
The positioning jig 91 includes a front position detection sensor 93 and a rear position detection sensor 94 on the engine lower dummy 92.

  The positioning jig 91 differs from the positioning jig 31 of the first embodiment only in that the engine lower dummy 92 is provided with a front position detection sensor 93 and a rear position detection sensor 94. The positioning jig 31 is configured in the same manner.

According to the positioning jig 91, when the small diameter portion 63 of the centering shaft 33 is fitted into the front through hole 47 and the second large diameter portion 66 is fitted into the rear through hole 48, the front position detection sensor 93. Thus, a deviation in the vertical direction (height) of the front through hole 47 with respect to the centering shaft 33 can be detected.
At the same time, the rear position detection sensor 94 can detect a deviation in the vertical direction (height) of the rear through hole 48 with respect to the centering shaft 33.

  Thus, after detecting the vertical displacement of the front and rear part through-holes 47, 48 with respect to the centering shaft 33, the shim having a thickness corresponding to each displacement is selected as in the first embodiment. By inserting the selected shim between the engine mount 16 and the hull 14, the engine mount 16 can be positioned at a normal height.

  According to the positioning jig 91 of the second embodiment, the same effect as that of the first embodiment can be obtained. In addition, the vertical displacement of the front and rear part through holes 47 and 48 with respect to the centering shaft 33 can be obtained. Can be detected by the front / rear position detection sensors 92, 93, so that the engine mounts 16 can be positioned more easily than in the first embodiment.

22A and 22B are cross-sectional views showing a centering jig (third embodiment) provided with an engine mount positioning jig according to the present invention.
A centering jig 95 according to the third embodiment includes an inspection jig 96 instead of the inspection jig 35.
The inspection jig 96 includes a detection unit 98 on the inspection shaft 97 and the inspection coupler 35 of the first embodiment in that the inspection coupler 101 includes front and rear position sensors 102 and centering position detection sensors 103. The only difference is the configuration similar to that of the inspection jig 35 of the first embodiment.

As shown in (a), according to the inspection jig 96, when the inspection coupler 101 is moved in the front-rear direction, the front-rear position sensor 102 matches the detection unit 98, that is, the inspection coupler 101 is in relation to the inspection shaft 97. If it is arranged in the normal front-rear direction, the front-rear position sensor 102 detects the detection unit 98.
As a result, it is possible to confirm that the inspection coupler 101 is disposed at the normal front-rear direction position with respect to the inspection shaft 97.

  In this state, the distance S between the rear end of the coupler 26b of the output shaft 27 and the front end of the coupler main body 103 of the inspection coupler 101 is measured. When the interval S matches the specified value, it is confirmed that the rear end of the coupler 26b of the output shaft 27 is disposed at a normal position.

As shown in (b), according to the inspection jig 96, the inspection coupler 101 is moved as shown by an arrow, and the annular portion 81a of the inspection coupler 101 is fitted to the coupler 26b of the output shaft 27.
Similar to the first embodiment, the inner diameter of the annular portion 81a is set slightly larger than the outer diameter of the coupler 26b. In addition, as described above, the inspection shaft 97 is disposed coaxially with the rotating shaft 24 (shown in FIG. 1) of the jet pump 20.

  By fitting the annular portion 81a to the coupler 26b, it can be confirmed by the alignment position detection sensor 103 that the coupler 26b of the output shaft 27 is arranged coaxially with the rotating shaft 24 of the jet pump 20. .

  According to the inspection jig 96 of the third embodiment, the same effect as that of the first embodiment can be obtained. In addition, the coupler 26b of the output shaft 27 is disposed at a normal position with respect to the front-rear direction. Since it can be confirmed by the sensors 102 and 103 that the pump 20 is arranged coaxially with the rotary shaft 24, the inspection of the coupler 26b of the output shaft 27 is made even easier than in the first embodiment. be able to.

FIG. 23 is a sectional view showing a centering jig (fourth embodiment) provided with an engine mount positioning jig according to the present invention.
The alignment jig 110 according to the fourth embodiment includes an inspection jig 111 instead of the inspection jig 96 according to the third embodiment.
The inspection jig 111 is different from the inspection jig 96 of the third embodiment in that the inspection coupler 101 includes the front / rear position sensor 112, and the other configuration is the same as the inspection jig 96 of the third embodiment. It is a thing.

In the inspection jig 111 of the fourth embodiment, when the inspection coupler 101 is moved in the arrow direction and the annular portion 81a is fitted to the coupler 26b, the coupler 26b of the output shaft 27 is moved in the front-rear direction by the front-rear position sensor 112. On the other hand, it can be detected whether or not it is arranged at a regular position.
In addition, as in the third embodiment, by fitting the annular portion 81a to the coupler 26b, the coupler 26b of the output shaft 27 is coaxially disposed with the rotary shaft 24 of the jet pump 20. It can be confirmed by the position detection sensors 103.

  According to the inspection jig 111 of the fourth embodiment, the same effect as that of the third embodiment can be obtained. In addition, when the annular portion 81a is fitted to the coupler 26b, the coupler 26b of the output shaft 27 is It is possible to detect whether or not the rotary shaft 24 of the jet pump 20 is disposed coaxially and whether or not the coupler 26b of the output shaft 27 is disposed at a normal position with respect to the front-rear direction. The inspection of the coupler 26b of the output shaft 27 can be performed more easily than in the third embodiment.

FIG. 24 is a sectional view showing a centering jig (fifth embodiment) provided with an engine mount positioning jig according to the present invention.
A centering jig 115 of the fifth embodiment includes an inspection jig 116 instead of the inspection jig 96 of the third embodiment.
This inspection jig 116 is different from the inspection jig 96 of the third embodiment only in that a front limit line 117a, a rear limit line 117b, and a tolerance center line 117c are formed at the tip of the inspection shaft 97. The configuration is the same as the inspection jig 96 of the third embodiment.

  In the inspection jig 116 of the fifth embodiment, the coupler 26b of the output shaft 27 is arranged at a normal position with respect to the front-rear direction by visually observing the front limit line 117a, the rear limit line 117b, and the tolerance center line 117c. It can be detected whether or not.

As a modified example of the fifth embodiment, the front and rear position sensor 119 may be provided in the inspection coupler 118 instead of the front limit line 117a, the rear limit line 117b, and the tolerance center line 117c.
In the modification of the fifth embodiment, the front / rear position sensor 119 detects the tip 120 of the inspection shaft 97 to detect whether or not the coupler 26b of the output shaft 27 is disposed at a normal position in the front / rear direction. be able to.

  According to the inspection jig 116 of the fifth embodiment, it is possible to obtain the same effect as that of the third embodiment. In addition, just by fitting the annular portion 81a to the coupler 26b as in the fourth embodiment. It is possible to detect whether or not the coupler 26b of the output shaft 27 is disposed coaxially with the rotary shaft 24 of the jet pump 20, and the coupler 26b of the output shaft 27 is disposed at a normal position with respect to the front-rear direction. Therefore, the inspection of the coupler 26b of the output shaft 27 can be more easily performed as in the fourth embodiment.

  In the above-described embodiment, the example in which the engine lower dummy 32 is attached to the engine mount 16 in ST10 and then the thrust plate 21 is attached to the wall portion 19a of the jet pump chamber 19 in ST11 has been described. The installation procedure of the thrust plate 21 is not limited to this. After the thrust plate 21 is attached to the wall portion 19a in ST10, the engine lower dummy 32 may be attached to the engine mounts 16 in ST11.

Moreover, in the said embodiment, although the boat propelled with a jet pump was demonstrated to the example as the small planing boat 10 which applies the alignment jig | tool 30,90,95, the propulsion means of a small planing boat is not limited to this. Absent.
Furthermore, the shapes of the engine lower dummy 32, the centering shaft 33, the pump dummy 34, the inspection pump dummy 36, the inspection shaft 37, and the inspection coupler 38 shown in the above embodiment are merely examples, and are not limited to the illustrated shapes. .

  The engine mount positioning jig and engine mount positioning method for a small planing boat engine of the present invention are suitable for application to a small planing boat that positions the output shaft of the engine at a normal position when the engine is mounted on the hull. is there.

It is a side view of the personal watercraft which positioned the engine with the engine mount positioning jig concerning the present invention. It is a perspective view which shows the centering jig | tool (1st Embodiment) provided with the positioning jig which concerns on this invention. It is a figure explaining the example which attaches an engine lower dummy to an engine mount in the engine mount positioning method of the engine for small planing boats concerning the present invention. It is a figure explaining the example which accommodates a pump dummy in a suction inlet in the engine mount positioning method which concerns on this invention. It is a figure explaining the example which fixes a pump dummy to a thrust plate in the engine mount positioning method which concerns on this invention. It is a figure explaining the example which confirms the shift | offset | difference of the front and rear part through-holes with respect to the centering shaft in the engine mount positioning method which concerns on this invention. It is a figure explaining the example which pushes a centering shaft into the bow side in the engine mount positioning method which concerns on this invention. It is a figure explaining the example which rotates the centering shaft in the engine mount positioning method which concerns on this invention. It is a figure explaining the example which positions the centering shaft in the regular position in the engine mount positioning method which concerns on this invention. It is a figure explaining the example which positions an engine mount with respect to the left-right direction in the engine mount positioning method which concerns on this invention. It is a figure explaining the example which positions an engine mount with respect to the front-back direction in the engine mount positioning method of the engine for small planing boats concerning this invention. It is a figure explaining the example which fixes an engine mount to a hull in the engine mount positioning method concerning the present invention. It is a figure explaining the example which removes an engine lower dummy in the engine mount positioning method which concerns on this invention. It is a figure explaining the example which attaches an engine in the engine mount positioning method which concerns on this invention. 3 is a flowchart illustrating an engine mount positioning method according to the present invention. It is a 1st operation explanatory view of an inspection jig used after a positioning jig concerning the present invention. It is the 2nd operation explanatory view of the inspection jig used after the positioning jig concerning the present invention. It is a 3rd operation explanatory view of the inspection jig used after the positioning jig concerning the present invention. It is a 4th operation explanatory view of an inspection jig used after a positioning jig concerning the present invention. It is the flowchart explaining the procedure which test | inspects an engine output shaft with the test | inspection jig used after the positioning jig which concerns on this invention. It is sectional drawing which shows the centering jig | tool (2nd Embodiment) provided with the engine mount positioning jig which concerns on this invention. It is sectional drawing which shows the centering jig | tool (3rd Embodiment) provided with the engine mount positioning jig which concerns on this invention. It is sectional drawing which shows the centering jig | tool (4th Embodiment) provided with the engine mount positioning jig which concerns on this invention. It is sectional drawing which shows the centering jig | tool (5th Embodiment) provided with the engine mount positioning jig which concerns on this invention. It is explanatory drawing which shows the example which mounted the engine in the conventional small planing boat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Small planing boat, 12 ... Hull, 14 ... Hull, 15 ... Engine, 15a ... Center of crankshaft, 16 ... Engine mount, 20 ... Jet pump, 21 ... Thrust plate, 21a ... Opening, 21b ... Mounting screw hole, 22 ... Stator, 23 ... Impeller, 25 ... Drive shaft, 31, 91 ... Engine mount positioning jig (positioning jig) for small planing boat engine, 32, 92 ... Engine lower dummy, 33 ... Centering shaft, 34 ... Pump dummy, 41 ... Frame frame, 42 , 43 ... Front and rear frames, 44 ... Left frame, 45 ... Right frame, 46 , 59 ... Screw, 46a ... Front left / right screw (screw), 46b ... Rear left / right Screws (screws), 47: front through-hole, 48 ... rear through-hole, 49 ... handle, 51 ... handle.

Claims (5)

An engine lower dummy that positions an engine mount that imitates the lower half of an engine that operates an impeller provided to a jet pump of a small planing boat ,
A centering shaft for positioning the engine lower dummy,
A pump dummy that has a support hole for supporting the centering shaft and is attached to a thrust plate for fixing the jet pump;
Consists of
In a state in which said thrust plate mounted to the pump dummy, said by inserting the centering shaft support hole, personal watercraft, characterized in Rukoto support the centering shaft rotation axis coaxial with said impeller Engine mount positioning jig for engines. The engine lower dummy is
A frame body substantially matching the vertical and horizontal dimensions of the engine in plan view;
A pair of detachable handles provided on the frame body;
Screws respectively provided at four corners of the frame frame for screwing into the engine mount;
Of the four screws, the bow side is referred to as the front left / right screw, and the stern side is referred to as the rear left / right screw. A front through hole opened in the frame body,
A rear through hole opened in the frame frame between the rear left and right threads and at the same center as the crankshaft center of the engine;
The engine mount positioning jig for a small planing boat engine according to claim 1, wherein The frame body is
Front and rear frames arranged at predetermined intervals in the front-rear direction;
A left frame connecting the left ends of the front and rear frames;
A right frame connecting the right ends of the front and rear frames;
Have
Of the screws provided at the four corners, the front left and right screws are respectively screwed to the front ends of the left and right frames,
Of the screws provided at the four corners, the rear left and right screws are respectively screwed to the rear ends of the left and right frames,
A handle is attached to each of upper ends of four screws, the front left / right screw and the rear left / right screw, and the screws are rotated in a screwing direction and a removing direction by these handles. 2. Engine mount positioning jig for a small planing boat engine. The thrust plate is
An opening for accommodating the impeller of the jet pump is formed in the center, and a mounting screw hole for mounting the stator of the jet pump is provided along the outer periphery.
The pump dummy is
The centering shaft is configured to be insertable, and is configured to be insertable into the opening of the thrust plate.
The engine mount positioning jig for a small planing boat engine according to any one of claims 1 to 3, further comprising a screw that can be inserted into the mounting screw hole of the thrust plate. When the engine is mounted on the hull constituting the hull via the engine mount, the front, rear, left and right positions and height of the engine mount are determined using the engine lower dummy , the centering shaft, and the pump dummy according to claim 1. Then, the engine lower dummy is removed, and the engine is mounted thereon, and the engine mount positioning method for a small planing boat engine is characterized in that:

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