JPH0626625B2 - Human body propulsion device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a propulsion device for a human body used in marine sports and the like.

(Prior Art) FIG. 2 (a) is a side view showing a conventional human body propulsion apparatus of this type, in which 101 is a streamlined apparatus body capable of being floated on the water surface, and 102 is the apparatus body 101. Handles arranged symmetrically on the outer side of the device, 103 is the device body 1
Reference numeral 104 denotes an engine housed in the internal space of 01, and 104 denotes a rotating shaft of the engine 103, the gear box 105 and the drive rod 1.
06 is connected to the device main body 101 at a rear portion (right side in the drawing) of the device main body 101, an intake pipe is erected on the upper surface of the device main body 101, and 108 is provided inside the device main body 101. The fuel chamber 109 is a cap that opens and closes the supply port of the fuel chamber 108.

In this propulsion device, as shown in FIG. 2 (b), the handle 102 of the device body 101 levitated on the water surface F is grasped by both hands of the operator J himself, and the device body 101 is sandwiched between the arm and the chest. As used, the adjustment of the propulsion speed is performed by a throttle (not shown) provided on one handle. The operator J shown by the solid line in the figure shows the state at the time of propulsion, and the operator J shown by the chain double-dashed line in the figure shows the state at the stop.

(Problems to be Solved by the Invention) However, in the above-described conventional propulsion device, the resistance of water (propulsion load) applied to the operator J during propulsion must be supported only by the arm force, and in this state. Device main body 101
It is difficult to use for women, children, etc. who do not have strength because it requires a large amount of arm strength for maneuvering, in addition to the fact that the operator must move the steering wheel in the turning direction for steering. There was a problem.

Further, in view of the above-mentioned circumstances, the applicant first of all, the apparatus main body 10
1 was devised in which a support (not shown) for supporting the operator J is fixedly arranged. However, when the support body that supports the operator J is fixedly arranged on the apparatus main body 101, when the force for floating or sinking is applied to the operator J during acceleration / deceleration, the apparatus main body 101 is also There is a problem that stability and maneuverability are deteriorated due to tilting in the front-back direction.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a propulsion device for a human body that does not require arm strength and can be easily operated even by a beginner, and that is excellent in stability and maneuverability. To do.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention includes a propulsion unit such as a screwdriver driven by a prime mover in a main body of an apparatus, and a driver located behind the main body of the apparatus is a handle of the main body of the apparatus. In a human body propulsion device configured to grip and steer a vehicle, a support body for supporting an operator is rotatably attached to the device body in a vertical direction, and the center of rotation of the support body is substantially propelled by a propulsion means. It is located on the axis.

(Operation) According to the present invention, since the support body that supports the human body is attached to the apparatus body, the resistance of water (propulsion load) applied to the human body during propulsion is applied to the apparatus body through the support body. .

Further, since the support is rotatably movable in the vertical direction, even if a force for floating or sinking is applied to the operator during acceleration / deceleration, the rotation of the operator with respect to the main body of the apparatus is prevented from rotating. It can be absorbed by movement. Further, since the resistance of water received by the operator and the support acts on the propulsion shaft of the propulsion means via the rotation center of the support, the action line of the force received from the support by the main body of the apparatus and the propulsive force Since the line of action (propulsion axis) coincides, the moment of the couple force due to the force received from the support body during propulsion does not occur in the apparatus body.

(Examples) Examples of the present invention will be described below with reference to the drawings.
In the following description, for convenience, the left side of the figure is referred to as the front and the right side of the figure is referred to as the rear.

1 is a longitudinal sectional view of the propulsion device, FIG. 3 is a top view of the same, and FIG.
The figure is the same side view.

In the figure, reference numeral 1 is a streamlined apparatus body that can float on the water surface. As shown in FIG. 5, a fuel chamber 2 for storing gasoline is formed in a watertight manner by a partition plate 3 in the upper front part of the main body 1 of the apparatus. A cap 4 capable of closing the supply port 2a in a closed state is attached to the port 2a so as to be openable and closable. Also,
A machine room 5 having a heat exhaust port 5a on the upper surface is provided in the center of the apparatus body 1, and an engine 6 is installed in the machine room 5.
A gear box 7 having an input shaft connected to an output shaft of the engine 6 is fixed. Further, an intake pipe 8 is provided upright between the fuel chamber 2 and the machine chamber 5 on the upper surface of the device body 1, and the intake pipe 8 and the intake port of the engine 6 are formed in the device body 1. Are connected via an intake passage 9. Further, as shown in FIG. 6, an air chamber 10 for imparting a predetermined buoyancy to the apparatus body 1 is formed in a watertight manner in the upper rear part of the apparatus body 1.

Reference numeral 11 denotes a substantially rectangular tube-shaped muffler fixed to the lower side of the air chamber 10 of the apparatus main body 1. The muffler 11 has an exhaust passage 12 inside and the machine chamber as shown in FIG. 5 has an exhaust inlet 12a to which the exhaust pipe 6a of the engine 6 is connected, and an exhaust outlet 12b on the lower surface. Further, the muffler 11 has a bearing 13 for screwing in the central hollow portion 11a, and the other end of the drive rod 14 having one end connected to the output shaft of the gear boss 7 is freely rotatable in the bearing 13. A screw 15 for propelling is fixed to the projecting end of the other end. In the illustrated example, the axis of the output shaft of the gear boss 7 and the axis of the screw 15 are vertically deviated from each other, so that a drive rod 14 having two universal joints is used. Further, on the upper surface of the central hollow portion 1a of the muffler 11, there is arranged a housing cylinder 16 into which an end portion of a second support rod 24 of a support body 21 described later can be inserted.

Reference numeral 17 denotes a handle shaft fixed to the rear side of the gear boss 7 by penetrating laterally slightly in the center of the front side of the apparatus body 1.
From the outer side surface of the base plate, and the parts project symmetrically for a predetermined length. Each of the projecting ends is provided with a substantially horizontal L-shaped preliminary horizontal rudder 18 which covers the front side of the projecting portion and is rotatable in the vertical direction. Further, a cylindrical grip 19 is fixed to a protruding portion on the left side of the shaft 17 in the drawing, and a cylindrical throttle 20 also serving as a handle is freely rotatable on the protruding portion of the shaft 17 on the right side in the drawing. Installed on. Although not shown, the throttle 20 is connected to a throttle lever provided on the carburetor of the engine 6 via a wire, and the throttle 20 can adjust the rotation of the engine 6, that is, the rotation of the screen 15. ing.

Reference numeral 21 denotes a support body for supporting the operator, which is mounted on the outer surface of the muffler 11 so as to be vertically rotatable. As shown in FIG. 7, the support member 21 has a substantially U-shaped connecting plate 22.
And a cylindrical first supporting rod 23 having one end rotatably connected to the connecting plate 22, and a second supporting rod 24 movably arranged in the first supporting rod 23. There is.

The connecting rod 22 is composed of a base plate 22a and two leg pieces 22b symmetrically connected to both sides of the base plate 22a. The connecting rod 22 has an outer surface of the muffler 11 of the apparatus body 1 via a connecting pin 27 described later. It is rotatably attached to. The substrate 2
A pivot hole 2 for connecting the first support rod 23 is provided at the center of 2a.
2c is formed. In addition, each leg hole 22b has a guide hole narrower in width than the two locking holes 22d of the same diameter formed at predetermined intervals in the vertical direction and the locking hole 22d that connects the locking holes 22d. 22e are formed.

The first support rod 23 has a shaft 23a which can be inserted into the pivot hole 22c of the connecting plate 22 at one end side surface.
3a is inserted into the pivotal hole 22c, and a pin 25 is inserted into the insertion end so as to be rotatably connected to the connecting plate 22. A lock mechanism 26 for fixing the second support rod 24 to the first support rod 22 at a desired position is arranged at the other end of the first support rod 23.

A rod-shaped pedestal 24a for placing the operator's foot on the opposite end of the second support rod 24 opposite to the first support rod 23 is symmetrically fixed.

The lock mechanism 26 will be described below with reference to FIGS. 8 and 9 (a), (b).

The lock mechanism 26 includes the second support rod 2 of the first support rod 23.
The locking guide groove 2 is spring-biased in the clockwise direction in FIG. 9 (a) at the end on the 4 side and is inclined in the circumferential direction on the inner surface.
6a and an operation ring 26c each having a through hole 26b formed at the end of the locking guide groove 26a and having a diameter smaller than that of a ball 26c described later, and a first support rod 23 on the side of the second support rod 24. It is composed of a ball holding hole 23b formed at an end and a ball 26d arranged in the ball holding hole 23b. Further, in order to prevent the rotation of the second supporting rod 24, a positioning hole 24b having a diameter smaller than that of the ball 26d is formed in the second supporting rod 24, and a linear positioning including the positioning hole 24a is performed. The groove 24c is formed on the outer surface thereof.

Normally, as shown in FIG. 9 (a), the operation ring 26c is spring-biased in the clockwise direction, and the ball 26d is pressed inward by the locking guide groove 26a. Therefore, the pressing force causes the second support rod 26c to move inward. 24 will be pressed and fixed. When the second support rod 24 is unlocked from the locked state shown in FIG. 9 (a), the ring 26c is counterclockwise against the spring biasing force as shown in FIG. 9 (b). The ball 26d faces the through hole 26b at the same time as the ball 26d largely moves outward by rotating the ball 26d.
As a result, the pressing force is released, so that the second support rod 24 can be arbitrarily moved to expand and contract the support rod 21.

Here, the support 2 described above with reference to FIGS. 10 (a) and 10 (b)
A mounting structure and a rotating operation of the device No. 1 on the apparatus body 1 will be described.

Two connecting holes 11b are formed symmetrically at a position slightly rearward of the screw 15 on a plane including the axis of the screw 15 on the outer surface of the muffler 11, and the connecting pin 11b has a connecting pin. 27 is inserted. The connecting pin 27 has an outer diameter of three steps and has the connecting hole 11
b and a small diameter portion 27a having a diameter slightly smaller than the guide hole 22e of the connecting plate 22, a diameter slightly larger than the connecting hole 11b, and a diameter slightly smaller than the locking hole 22d of the connecting plate 22. The large diameter portion 27b includes a large diameter portion 27b and a large diameter portion 27c having a diameter larger than the locking hole 22d of the connecting plate 22.
C has a C-shaped finger hook ring 27d rotatably. The connecting pin 27 is moved in the direction of the central cavity portion 11a of the muffler 11 by a coil spring 27f stretched between a collar member 27e fitted to the end of the small diameter portion 27a and the back side of the connecting hole 11b. Energized, small diameter portion 27
The step portion of a and the medium diameter portion 27b is pressed against the end surface of the connecting hole 11b.

The connecting plate 22 is rotatably attached to the outer surface of the muffler 11 by inserting the medium diameter portion 27b of the connecting pin 27 into the locking hole 22d, and the state shown in FIG. The support 21 can be rotated about the locking hole 22d as a fulcrum in a state where the middle diameter portion 27b is fitted into the upper locking hole 22d. Further, the connecting plate 22 is locked so as not to be displaced from the position by fitting the middle diameter portion 27b into the locking hole 22d.

When changing the position of the locking hole 22d fitted into the connecting pin 27, as shown in FIG. 10 (b), the finger hook ring 27d of the connecting pin 27 is pulled out against the biasing force of the coil spring 27f. The small diameter portion 27a of the connecting pin 27 may be made to correspond to the locking hole 22d of the connecting plate 22. In this state, the connecting plate 22 is moved along the guide hole 22e and the other locking hole 2d is moved.
The connecting pin 27 may be returned to its original state by aligning 2d with the connecting pin 27.

The position of the locking hole 22d in the propulsion device of the illustrated example is changed when the propulsion device is transported or stored. As shown in FIG.
As described above, the engaging hole 22
If the position of d is changed to the lower side, the support 21 can be folded to the lower side of the apparatus main body 1 as shown in FIG. 11,
The propulsion device can be made compact to facilitate its transportation, storage, and storage.

12 to 14 show an example in which a body holding plate 28 for holding the body of the operator, particularly the upper half of the body, is attached to the support 21 described above.

The body holding plate 28 has a vertically elongated insertion groove 28b for the first supporting rod in the central portion thereof, and a first holding plate 28a having a substantially U-shaped cross section for holding the upper body and thighs, and the first holding plate 28a. And a fin-shaped second holding plate 28c that holds the crotch portion and is connected to the lower part of the first holding plate 28a with the first support rod 23 inserted therethrough. The first holding plate 28a is fixed to the connecting plate 22 and mounted on the support 21.

Hereinafter, a method of operating the propulsion device will be described with reference to FIG. 15 showing a side view in a stopped state and FIG. 16 showing a side view in a propulsion state. Incidentally, in these drawings, the one using the supporting rod 21 to which the body holding plate 28 is attached is shown.

First, before starting the operation, the position of the pedestal 24a of the support 21 is adjusted according to the height. This adjustment is performed by using the lock mechanism 26 of the support body 21 as described above. After the operation ring 26c is rotated in the unlocking direction, the second support rod is appropriately moved to operate at that position. Ring 2
6c should be restored.

When operating the propulsion device, as shown in FIG. 15, the handle 19 and the throttle 20 (not shown) of the device body 1 levitated on the water surface F are grasped by the hands of the operator J himself, and the foot is pedestal. 24a, and the upper body is placed on the body holding plate 28. In this state, the throttle 20 is gradually opened to start the vehicle. As shown in FIG. 16, the body gradually floats along with the propulsion, but since the floating is absorbed by the rotation of the support body 21 with respect to the apparatus body 1, the apparatus body 1 tilts forward and downward. There is no. Further, when it is desired to make a turn in this propulsion state, the device main body 1 may be tilted in the turning direction, and at the time of this turn, the first and second support rods 23, 24 supporting the operator move the shaft 23a. Since it rotates about the center, it is possible to control the propulsion device as if riding on a motorcycle by tilting only the device body 1 without difficulty.

By the way, the water resistance received by the operator J and the support 21 during propulsion is determined by the center of rotation of the support 21 (position of the connecting pin 27).
Although it is transmitted to the apparatus main body 1 via the, the rotation center of the support body 21 is arranged on the axis line that is the center of the propulsion force, that is, the propulsion axis line of the screw 15, so that the water of the operator J and the support body 21 is The influence of the resistance on the device body 1 can be made extremely small. This will be described below.

First, as shown in FIG. 17, gravity W1 acts on the center of gravity G1 of the apparatus body 1, and buoyancy b1 acts on the buoyancy center B1 of the apparatus body 1. In addition, the driving force F
Occurs, the resistance D1 of water and the lift L1 act on the apparatus body 1 in proportion to the speed. At that time, if the distance between the axis of water resistance D1 and the axis of propulsive force F is h1, a moment of a couple is generated in the apparatus body 1 with a size of D1 × h1. Moment of force and lift L1
Is canceled by a lift L2 in the reaction direction being generated by the horizontal rudder 18, and the apparatus body 1 is kept in a stable posture. Further, due to the propulsion of the apparatus body 1, water resistances Dm, Df and Lm, Lf act on the operator J and the support body 21, respectively. These Dm and Df rotate the apparatus body 1 and the support body 21, respectively. Act on the center. As a result, Dm
And the line of action of Df and the line of action of the propulsive force F (the propulsion axis) match, the force D received from the support body 21 is applied to the apparatus main body 1.
A couple moment due to m and Df is not generated. Therefore, when the propulsive force F increases or decreases, the operator J and the support body 21 float or sink about the rotation fulcrum of the support body 21 due to changes in the lift forces Lm and Lf, but the device body 1 moves from the support body 21. Always maintain a stable posture even if the amount of force received changes. Even if the center of rotation of the support body 21 is not strictly located on the propulsion shaft, the same effect as described above can be obtained if it is almost on the propulsion shaft.

Here, the influence of the propulsive force on the apparatus main body 1 when the center of rotation of the support body 21 is away from the axis that is the center of the propulsive force will be described.

As shown in FIG. 18, assuming that the center of rotation of the support 21 is separated from the axis (propulsion shaft) on which the propulsive force F acts by h2 upwards, the apparatus main body 1 has the same water as that of the apparatus main body 1 as described above. The moment of the couple due to the resistance of No. 1 acts on the magnitude of D1 × h1 and the moment of the couple due to the resistance of water of the operator J and the support 21 (Dm + Df) × h2. By the way, in the case of the present embodiment, the projected area of the operator J and the support 21 with respect to the propulsion direction is about 2 of the apparatus main body 1.
It is predicted that the resistance coefficient is about 2.5 times, and if h1 and h2 are equal, the driver J and the support 2
The moment of the couple due to the water resistance Dm and Df of 1 is about 5 times the moment of the couple due to the water resistance D1 of the apparatus body 1. That is, the moment of the couple due to the water resistance D1 of the apparatus main body 1 can be suppressed by the horizontal rudder 18, but the moment of the couple due to the water resistances Dm and Df of the operator J and the support 21 depends on the D1. It is very large compared to the one used for horizontal rudder 1 during rapid acceleration or deceleration during propulsion.
It is extremely difficult to deal with it only by the suppression force of 8. Therefore, in the apparatus in which the apparatus main body 1 and the operator J are almost submerged as in the present embodiment, the steering stability is improved when the rotation center of the support 21 is away from the axis line which is the center of the propulsion force. It will be significantly reduced.

As described above, according to the above-described embodiment, since the support body 21 supporting the operator J is mounted rotatably in the vertical direction, the propulsion load during propulsion is applied to the apparatus main body 1 through the support body 21. As a result, the burden on the arm of the operator J who holds the steering wheel 19 and the throttle 20 becomes extremely small. Therefore, since the manipulator of the propulsion device does not require so much strength, it is extremely easy to handle and can be sufficiently used by a woman, a child or the like having no strength.

In addition, even when the force for floating or sinking is exerted on the operator J during acceleration / deceleration, the operator J with respect to the apparatus main body 1
The rotation of the support body can be absorbed by the rotation of the support body to prevent the tilting of the apparatus body 1 that may occur during the floating and the sinking, and in addition, the rotation fulcrum of the support body 21 (position of the connecting pin 27). Since it is arranged on the axis which is the center of the propulsive force, that is, the axis of the screw 15, the couple due to the force received from the support body during propulsion does not occur in the apparatus main body 1 and is caused by this couple. Since it is possible to reliably prevent the tilting of the device body 1, it is possible to improve the stability and maneuverability of the device body 1 during propulsion, requiring no special maneuvering technique, and being easy to operate even by a beginner. You can

Furthermore, since the first and second support rods 23 and 24 of the support body 21 that supports the operator J are configured to rotate about the shaft 23a, the device main body can be used even when turning in a propulsion state. 1 can be tilted in the turning direction without difficulty, and the propulsion device can be operated as if riding on a motorcycle.

Furthermore, since the support body 21 is configured to be expandable and contractible, the position of the pedestal 24a of the support body 21 can be appropriately adjusted according to the height of the operator, and this adjustment operation is performed by the operation ring of the lock mechanism 26. This can be easily performed by rotating 26c. Further, by using the support rod 21 to which the body holding plate 28 is attached, the upper half of the body of the operator J can be stably supported without lateral shake, so that the maneuvering can be further facilitated and fatigue during maneuvering can be achieved. Can be reduced.

Furthermore, since the support body 21 is configured to be expandable and contractible and is mounted so that the support body 21 can be folded under the apparatus main body 1, the support body 21 is contracted and folded. As a result, the propulsion device can be made compact and can be easily transported, stored and stored.

Furthermore, since the auxiliary horizontal rudder 18 that covers the handle 19 and the throttle 20 is rotatably attached to the outer surface of the device body 1, the motility of the propulsion device can be improved, and particularly the throttle 20 can be gripped. It is possible to reduce the resistance of water applied to the hands and improve the operability.

Although the support 21 is attached to the outer surface of the muffler 11 in the above embodiment, the support 21 may be attached at any position on the plane including the axis of the screw 15 of the apparatus body 1. May be Further, although the foot-holding type has been illustrated as the supporting body 21, it goes without saying that the supporting body may be a sitting type. Furthermore, the propulsion axis used in the claims refers to the axis that is the center of propulsive force in propulsion means such as screw.

(Effects of the Invention) As described above, according to the human body propulsion device of the present invention, the resistance of water (propulsion load) applied to the arm of the operator who holds the handle during propulsion can be extremely reduced. In addition, the fatigue of the arms and wrists can be significantly reduced, and even a person with weak arm strength such as a woman or a child can easily maneuver. Further, even if the operator floats or sinks during acceleration or deceleration, this can be absorbed by the rotation of the support body that supports the operator, so that the tilting of the device body can be reliably prevented.
At that time, the resistance of water of the operator and the support acts on the propulsion shaft of the propulsion means via the center of rotation of the support, so that the moment of the couple due to the force received from the support during propulsion is applied to the apparatus main body. It does not occur, and it is possible to reliably prevent the tilting of the device body due to the moment of the couple. Therefore, stability and maneuverability at the time of propulsion can be markedly improved, so that advanced maneuvering techniques are not required and beginners to experts can widely enjoy maneuvering.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a propulsion device according to the present invention, FIG. 2 (a) is a side view of a conventional propulsion device, FIG. 2 (b) is a side view showing a propulsion state, and FIG. Side view of the propulsion device, No. 4
The figure is the same top view, FIG. 5 is the sectional view along the line AA of FIG. 1, and FIG.
FIG. 7 is a sectional view taken along line BB in FIG. 1, FIG. 7 is an exploded enlarged view of a support, FIG. 8 is an enlarged vertical sectional view of a C portion in FIG. 4, and FIG. 9 (a).
Is a sectional view taken along the line EE of FIG. 8, FIG. 9 (b) is a diagram showing an unlocked state, FIG. 10 (a) is an enlarged vertical sectional view of a D part of FIG. 4, and 10 (b) is The figure which shows a lock release state, FIG. 11 is a side view which shows the folding state of a support body, FIG. 12 thru | or 14
The figure shows another embodiment of the support body. Fig. 12 is a side view of the support body, Fig. 13 is a top view of the support body, Fig. 14 is an exploded view of the support body, and Fig. 15 is propulsion. Fig. 16 is a side view showing the stopped state of the device, Fig. 16 is a side view showing the propelled state of the propulsion device, and Fig. 17 is a force acting on the propulsion device when the rotation center of the support is arranged on the propulsion shaft. And FIG. 18 is a relationship diagram of the force acting on the propulsion device when the center of rotation of the support is away from the propulsion shaft. 1 ... Device body, 6 ... Engine, 15 ... Screen, 21 ... Support.

Claims (1)

[Claims] 1. A propulsion device for a human body, comprising a propulsion unit such as a screw driven by a prime mover in the main body of the apparatus, and a pilot located behind the main body of the apparatus configured to grip a handle of the main body for steering. A human body propulsion device, wherein a support body for supporting an operator is rotatably attached to the main body of the apparatus in a vertically rotatable manner, and a rotation center of the support body is arranged substantially on a propulsion axis of the propulsion means.