JPH0545599Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an engine stop device for an engine-mounted water vehicle, such as a water vehicle used in a small recreational boat.

[Prior art]

If a small vessel floods beyond its maximum stability,
If you pull it up immediately after being submerged in water and perform an overhaul, the damage will be relatively small, but if the engine or other machinery continues to run when submerged in water, foreign objects may get caught between bearings such as the crankshaft, pistons, or cylinders. It looks pretty bad. This tendency is particularly strong in those using a floatless type carburetor, which is often found in small leisure vessels, because the engine continues to operate even if the carburetor is tilted significantly.

Therefore, various proposals have been made to immediately stop the drive unit such as the engine when the above situation occurs. A typical example is Utility Model Application No. 60-51852 [Capsize detection switch for ships, etc.]
There is. According to this, in order to prevent malfunctions even when the hull swings significantly, a hollow body is formed by a cylindrical part and a gradually expanding part that gradually expands from the cylindrical part, and the inside of the gradually expanding part of the hollow body is A conductor is housed in a movable manner, a convex portion is formed at the bottom of the gradually expanding portion, and a pair of electrodes are provided at a distance from each other in the cylindrical portion. When the cylindrical part inclines more than the determined inclination, that is, this is regarded as an overturning event, and the conductor is configured to short-circuit between the two electrodes at the time of overturning.

[The problem that the idea aims to solve]

By the way, in the conventional detection switch having the above structure, the conductor housed in the gradually expanding part of the hollow body moves in accordance with the inclination of the hull, etc., and short-circuits a pair of electrodes provided at a distance in the cylindrical part. This stops the driving part of the engine, etc. Therefore, even if the maximum restoring force is extremely large and the slope is within the range of restoring, the conductor will move toward the electrodes and close the gap between the two electrodes. The engine will be stopped due to a short circuit. In addition, in relatively small ships, etc., when running at high speed, the ship's body vibrates violently as it passes between wave crests, and even with such intense vertical vibration of the ship's body, the conductor moves toward the electrode. There may be cases where a stop operation is required.

[Objective of the present invention and means for solving the problems]

This idea was made in view of the above circumstances.
The purpose is to provide an engine stop device for an engine-mounted watercraft, such as a small leisure boat, and its configuration includes an engine oil tank for an engine-mounted watercraft. While forming a recess at the bottom of the
In the oil tank, a guide tube extending in the vertical direction is disposed in the recess, and a weight is disposed with loose fit and support in the guide tube, and the guide tube has an upwardly extending guide tube for the weight. A stopper is formed to regulate the movement limit, and a detector is disposed to detect a state in which the weight is in contact with the stopper, and driving of the engine is stopped based on a contact state detection signal from the detector. Configure.

[Effect]

In other words, by adopting the above configuration, the present invention is suitable for cases where the maximum stability of the hull is extremely large, and is capable of stably detecting the rocking angle even in the case of severe rocking of the hull. This provides an engine stopping device for the following.

〔Example〕

An embodiment of the engine stopping device for a watercraft according to the present invention will be described in detail based on FIGS. 1 to 4a and 4b.

FIG. 1 shows a small vessel (boat) equipped with an engine stop device for watercraft according to the present invention.

In the figure, 1 is a hull, 2 is a two-cycle engine installed approximately in the center of the hull 1, and 3 is an oil tank for supplying a predetermined amount of engine oil to the engine 2.

As shown in FIG. 2, the shape of the oil tank 3 is such that a bottom portion 3a is bulged downward at an appropriate position to provide a so-called oil reservoir recess 3b.
There is an opening 3 in the tank top surface 3c located directly above b.
d, and a guide cylinder 4 is disposed inside the oil tank 3 so as to be inserted through the opening 3d. The shape of the guide cylinder 4 is formed so that the diameter below the approximately central position is smaller than that above the guide cylinder, and brim-like stoppers 4a and 4b are formed at the center position and the lower end of the small diameter part, and both stoppers 4
On the outer periphery of the cylinder divided into two by a and 4b, there is a displacer 5 configured as a float (this displacer is configured with a magnetic material M placed on the inner periphery of a material that is lighter than the specific gravity of oil) and a weight. A displacer 6 (this displacer is composed of a material with a magnetic material M disposed on the inner periphery of a material heavier than the specific gravity of oil) is disposed in a loosely fitted manner. That is, as described above, the displacer 5 loosely fitted above the stopper 4a is composed of a floating body that is lighter than the specific gravity of the oil, so it is in a normal state (the top and bottom of the oil tank 3 are in the state shown in the figure). In this case, the displacer 6 is floating on the larger diameter side of the guide tube 4 and is in contact with the lower end of the larger diameter, and the displacer 6 loosely fitted between the stopper 4a and the lower stopper 4b is as described above. Since it is composed of a weight body that is heavy compared to the specific gravity of oil, it is in a state sunk to the lower end of the guide tube 4 in the normal state (the state in which the top and bottom of the oil tank 3 are shown in the figure).

Also, on the small diameter side of the inside of the guide tube 4, an ON-
Two reed switches 7, 8 that operate OFF (one of these reed switches is connected to the stopper 4)
The other is located above the stopper 4a and is used for detecting the oil level, and the other is located below the stopper 4a.
This is used to detect a state in which the oil tank 3 is upside down, that is, a state in which the hull 1 exceeds the maximum righting range. In the figure, 20 is an oil supply port, 21 is a breather, 22 is a strainer, 23 is a joint, and 24 is an oil outlet.

By the way, the reed switch 8 is incorporated into the ignition circuit of the engine 2 as shown in FIG.
It is designed so that the system can be stopped and started.

In the ignition circuit, 9 is a stop switch for manually stopping the engine, 10 is a generator coil, 11 is a trigger coil, 12 is a discharge thyristor, 13 and 14 are commutators, 15 is a capacitor, 16 is an ignition coil, and 17 is a plug, 18 is an oil replenishment warning lamp, and 19 is a battery.

Hereinafter, the operation of the engine stop device for a watercraft according to the present invention will be explained with reference to FIGS. 4a and 4b.

That is, the engine stop device for a watercraft according to the present invention utilizes the oil tank 3 and bulges the bottom 3a of the oil tank 3 downward to provide the oil reservoir recess 3b.
b, with the distal end of the guide tube 4 inserted into the tank upper surface 3c facing the opening 3d, and disposed inside the guide tube 4 from above on the outer periphery of the guide tube 4; Due to the separation and contact of the magnetic body M in 6.
Two reed switches 7 and 8 that operate ON-OFF
Insert and place the reed switch 7 located above.
The reed switch 8 located below detects the oil level and detects when the oil tank 3 is turned upside down, so when there is sufficient oil in the tank 3, , the displacer 5 is in a state floating on the larger diameter side of the guide tube 4, and therefore the position of the magnetic body M of the displacer 5 with respect to the reed switch 7 is in a separated state, and the reed switch is in the OFF state. Therefore, the generating coil 1
The electromotive current generated at 0 is normally supplied to the spark plug 17 side, and the engine 2 is properly driven. When the amount of oil in the oil tank 3 decreases to below a certain level, the displacement element 5
decreases as the oil level increases, and the displacement element 5
Since the magnetic body M installed in
Turn on 8.

The displacer 6 is used to detect the rocking of the hull, but even when the hull 1 is rocking a lot or vibrating violently in the vertical direction, the displacement element 6 is used to detect the rocking of the ship.
Since the displacer 6 is disposed in a recess which is an oil reservoir, the oil acts as a damper and the vertical movement of the displacer 6 does not cause the switch 8 to be turned on.

On the other hand, when the hull 1 is tilted beyond the maximum righting range, the orientation of the oil tank 3 changes from the state shown in FIG. 4a to the state shown in FIG. 4b. Therefore, under normal conditions, the oil reservoir recess 3b
The displacer 6, which has been submerged and stationary at the lowermost end of the guide cylinder 4 facing inward, moves toward the stopper 4a as the oil tank 3 is turned upside down. In this case, the displacer 6 is forced to fall into contact with the stopper 4a by the oil flowing out from inside the recess, so the magnetic body M equipped on the displacer 6 quickly approaches the reed switch 8, and the reed switch 8 detects the approach of the magnetic material M and enters the ON state. Therefore,
The electromotive current generated in the generator coil 10 flows to the ground side and the supply to the spark plug 17 side is cut off, so that no ignition operation is performed and the driving of the engine 2 is stopped. In addition, if the float for detecting the oil level is placed above the weight for stopping the engine, the damping effect of the weight caused by oil shortage can be reduced to notify the driver of the oil shortage. Decrease, etc. can be appropriately notified. still,
In the above embodiment, a magnetic material is placed in the displacer, and the reed switch is turned on and off by the contact and separation of the magnetic material.
However, the same effect can be achieved by using other sensor systems, and the present invention is not limited to the above-mentioned embodiment.

[Effect of idea]

As explained in detail above, the present invention provides a method for forming a recess in the bottom of an engine oil tank of an engine-mounted water vehicle, arranging a guide tube along the vertical direction in the recess within the oil tank, and arranging a weight in a loosely fitted manner in the guide tube, and forming a stopper on the guide tube to limit the upward movement of the weight, and
A detector is disposed to detect when the weight abuts against the stopper, and the engine is stopped based on a signal detecting the abutment state from the detector. This provides various excellent effects, such as stable operation despite severe up and down vibrations of the hull, being suitable for cases where the maximum restoring force of the hull is extremely large, and simplifying the arrangement of the detector and the displacement element within the stop tank.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an embodiment of a boat equipped with an engine stop device for a watercraft according to the present invention, and Fig. 2 is an oil tank equipped with a displacement element and a detector for the engine stop device for a watercraft. An explanatory diagram showing the structure of , Figure 3 is an engine starting ignition circuit diagram,
FIGS. 4a and 4b are explanatory views of the operation of the engine stop device for a watercraft according to the present invention. 1... Hull, 2... Engine, 3... Oil tank, 3a... Tank bottom, 3b... Oil pool recess, 3c... Tank top, 3d... Tank opening, 4... Guide tube, 4a , 4b... Stopper, 5, 6... Displacer, 7, 8... Reed switch, M... Magnetic material.

Claims (1)

[Claims for Utility Model Registration] (1) A recess is formed at the bottom of an engine oil tank in an engine-mounted watercraft, and a recess is formed in the oil tank along the vertical direction within the recess. A guide cylinder is disposed, a weight is loosely supported by the guide cylinder, and a stopper is formed in the guide cylinder to restrict the upward movement limit of the weight. A detector is placed to detect when the weight is in contact,
An engine stop device for a watercraft, characterized in that the engine is configured to stop driving the engine based on a contact state detection signal from the detector. (2) The engine stop device for a watercraft according to claim 1, wherein the weight is a disc body having a permanent magnet, and the detector is a reed switch embedded in a guide tube. (3) A float having a lighter specific gravity than the oil is disposed above the weight so as to be supported loosely in the guide tube, and a detector at the position of the float detects the amount of oil remaining in the oil tank. An engine stop device for a watercraft according to claim 1.