JP2020069879A - Paddle wheel and aquatic plant cutting vessel provided with paddle wheel - Google Patents

Abstract

To provide an aquatic plant cutting vessel with great propulsion force and capable of moving at a relatively high speed while using propulsion by paddle wheels.SOLUTION: A pair of paddle wheels 10 used for propulsion of a vessel comprises: a paddle member 10a with a paddle motor 13 provided on a tip of a spoke 10e driven through a hub 13a and obtaining propulsion force by paddling the water surface; and a pair of a plate-like outer wheel 10b and a plate-like inner wheel 10c provided to sandwich the paddle member. The outer wheel 10b is provided with a suction port 10h for sucking in water in the horizontal direction from outside to inside of the outer wheel 10b below a waterline WL on a reverse side in a forward rotational direction of the paddle wheels 10 of the paddle member 10a, and propulsion force of the paddle member 10a is secured by suppressing an occurrence of a space E without water.SELECTED DRAWING: Figure 11

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paddle wheel and a waterweed reaper equipped with a paddle wheel, and more particularly to a paddle wheel having high propulsion efficiency and a waterweed reaper equipped with the paddle wheel.

  Floating on the surface of water with abundant grass, the hull with a float has an opening with a cutting blade at the bow, and the pair of paddle wheels provided on both sides of the ship propel the rear of the hull by a conveyor. There are some weed cutting boats that are transported to, stored in, and discharged from the rear of the hull. Such a weeding machine is suitable for propulsion by paddle wheels, because weeds are often overgrown and work slowly in shallow lakes and rivers.

  However, the propulsive force of the paddle wheel is weaker than that of a screw, and when the amount of harvested aquatic plants taken up by the aquatic harvester exceeds the standard, the resistance of the aquatic plants that have grown is large, and It may be difficult to escape.

Further, generally, there is a problem that the propulsion by the paddle wheel is relatively low and the speed is low as compared with the driving by the screw.
In view of this, the aquatic weeding machine described in Patent Document 1 has been proposed in which a ship equipped with a paddle for propulsion is provided with a screw for auxiliary propulsion. With such a configuration, by using the paddle and the screw together, the propulsive force is increased, and it is possible to easily escape from the aquatic plant area.

JP-A-8-172854

  However, originally, in lakes and rivers where aquatic plants are growing, there is a problem that aquatic plants and the like are likely to be entangled with the screw by the screw propulsion. In addition, the water depth is often shallow, and there is a problem that the screw may be damaged if the screw comes into contact with rocks on the bottom of the water.

  An object of the present invention is to provide a paddle wheel that is propelled by a paddle wheel, has a large propulsive force, and can be moved at a relatively high speed, and a water grass cutting ship provided with the paddle wheel.

  In order to solve the above-mentioned problems, a paddle wheel of the present invention is a pair of paddle wheels used for propulsion of a ship, and is provided radially from a hub that is fixed to drive means and is rotatable and a hub that is driven by the hub. A power transmission member composed of a spoke or a disc, a paddle member provided at the tip of the power transmission member to scratch the water surface to obtain a propulsive force, and a pair of plate-shaped wheels provided so as to sandwich the paddle member. The paddle member is provided with a water intake port on the opposite side of the paddle wheel in the forward rotation direction of the paddle member for absorbing water from the outside of the paddle wheel to the inside below the waterline.

It is preferable that the water suction port is provided only on the outer wheel.
Further, it is preferable that the water inlet has a circular shape.
It is also preferable that the wheel has an opening at the center around the rotation axis.

It is also preferable that the wheel has a regular polygonal shape when viewed in the rotation axis direction.
It is preferable that the paddle member includes a protrusion mechanism that slides onto the outer periphery of the wheel to protrude.

Further, it is preferable that the paddle member includes a slide wall continuous with the wheel.
Then, the present invention can be suitably implemented by the water grass cutting ship equipped with any one of the above paddle wheels.

  ADVANTAGE OF THE INVENTION According to the paddle wheel of this invention and the water grass cutting ship provided with the paddle wheel, although it is propulsion by a paddle wheel, there is an effect that a propulsive force is large and it can move relatively fast.

The perspective view of the water grass cutting ship of embodiment. The top view of the water grass cutting ship of embodiment. The side view of the port side of the water grass cutting ship of the embodiment which lowered the mowing head and raised the carrying-out part. The side view of the port side of the aquatic grass mowing ship of the embodiment which raised the mowing head and lowered the carrying-out part. The perspective view which looked at the paddle wheel of an embodiment from the outside of a water grass cutting ship. The perspective view which looked at the paddle wheel of an embodiment from the hull side of a water grass cutting ship. The exploded perspective view of the paddle wheel of an embodiment. The side view which shows the effect | action of the paddle wheel of embodiment. The side view which shows the effect | action of the paddle wheel of embodiment. The side view which shows the effect | action of the paddle wheel of embodiment. Sectional drawing which looked at AB part of the paddle wheel of embodiment from the front. The side view which shows the effect | action of the paddle wheel of embodiment. The side view which shows the effect | action of the paddle wheel of a comparative example. Sectional drawing which looked at the CD section of the paddle wheel of a comparative example from the front. The side view which shows the effect | action of the paddle wheel of a comparative example. (A) The side view which shows the paddle wheel of another embodiment. (B) A perspective view showing a slide type nail.

(First embodiment)
Hereinafter, an embodiment of a water grass cutting ship embodying the present invention will be described with reference to FIGS. 1 to 12. In explaining, when moving forward with the traveling direction of the waterweed reaping boat 1 being the front direction <Overall configuration>
As shown in FIGS. 1 to 3, the aquatic weeding boat 1 includes a substantially rectangular hull 4 that is a float and is long in the front-rear direction, and a harvesting head 5 arranged on a bow 41 of the hull 4. The storage unit 6 is arranged in the center of the hull 4 and conveys and stores the waterweeds cut by the cutting head 5. The carry-out unit 7 is provided at the stern 42 of the hull 4 for carrying the cut-out aquatic plants stored in the storage unit 6 to the outside and carrying them out. These are configured to be able to convey aquatic plants continuously by a conveyor.

  A driver's cab 8 is provided in the center of the hull 4 so as to straddle the storage unit 6 to the left and right, and a machine room 9 in which an engine and a hydraulic pump (not shown) are housed is provided in the rear of the driver's cab 8. Is provided.

In addition, propulsion paddle portions 2 are arranged at the center portions of the starboard 43 (FIG. 2) and the port 44 of the upper surface 45 of the hull 4 so as to project left and right.
<Hull 4>
The hull 4 is made of stainless steel, and has an airtight structure in which the whole is long in the front-rear direction and floats on the water surface as a substantially flat rectangular parallelepiped float.

  The upper surface 45 is a rectangular horizontal plane that is long in the front-rear direction. As shown in FIG. 3, the lower front part of the bow 41 is formed as a plane that is directed obliquely downward to reduce the resistance of water when moving forward. The front upper part is a flat surface directed obliquely upward to prevent interference with the mowing head 5. The lower part of the stern 42 is formed as a diagonally downward plane to reduce the resistance of water when moving backward. The bottom surface (see FIGS. 3 to 5) is a horizontal surface so that it can work even in shallow lakes and is stable even when placed on the ground.

The starboard 43 (FIG. 2) and the port 44 are both formed as vertical planes.
<Mowing head>
The mowing head 5 includes a frame 52 supported by the hull 4, a bucket 53 supported by the frame 52, and a take-in conveyor 54 arranged on the bottom surface of the bucket 53.

<Frame>
The frame 52 includes a pair of left and right rear arms 52a / 52a extending linearly upward, and a pair of left and right front arms 52b / 52b branching from the rear arm 52a near the lower end and extending linearly about 50 degrees forward. Equipped with. An upper arm 52c that connects the upper ends of the left and right front arms 52b and the rear arm 52a is provided. Thus, the rear arm 52a, the front arm 52b, and the upper arm 52c form a truss structure.

  Further, a rear horizontal arm 52d that horizontally connects the upper ends of the rear arms 52a / 52a to each other horizontally and a front horizontal arm 52e that horizontally connects the upper ends of the front arms 52b / 52b to each other horizontally are provided.

  Supporting parts 51/51 are provided on the left and right of the front part of the upper surface 45 of the hull 4, the lower ends of the rear arms 52a / 52a are respectively pivotally supported, and the frame 52 can swing around the supporting parts 51/51. Is becoming

  Further, lower support portions 52g / 52g are provided on the left and right of the end portion of the upper surface 45 of the hull 4 on the bow 41 side. The lower ends of the head cylinders 52f / 52f are pivotally supported by the lower support parts 52g / 52g, and the upper ends of the head cylinders 52f / 52f are respectively supported by the upper support parts 52i / 52i of both ends of the rear horizontal arm 52d. It is supported.

  Therefore, when the head cylinders 52f / 52f extend, the frame 52 is displaced so that the front portion rises, and when the head cylinders 52f / 52f contract, the frame 52 is displaced so that the front portion descends.

<Bucket>
The bucket 53 includes a horizontal bottom surface 53a and side walls 53b / 53b vertically provided on both left and right sides of the bottom surface 53a. Each of the side walls 53b / 53b has a shape of an isosceles right triangle at the front portion, and a wall surface lower than the front portion parallel to the bottom surface 53a is formed at the rear portion. The vicinity of the apex of the front portion of the side walls 53b / 53b is supported by front support portions 53c (FIG. 3) provided at both ends of the front horizontal arm 52e. Further, the rear end portions of the side walls 53b / 53b are arranged so that the rear support portion 52d (FIG. 2) of the bottom surface 53a is placed by the rear support portion 52h that bridges the central portions of the left and right rear arms 52a / 52a. Supported. Therefore, the bucket 53 rotates integrally with the frame 52.

<Opening and cutting blade>
An opening side wall 55a is provided continuously at the front ends of the side walls 53b / 53b, and the front end of the opening side walls 55a / 55a is wider than the interval between the side walls 53b / 53b and has a width substantially equal to the width of the hull 4. There is. The opening 55 is formed by the tip of the opening side wall 55a / 55a and the tip of the bottom surface 53a.

  A cutting blade 56 is provided on the periphery of the opening 55. The cutting blade 56 is composed of a vertical cutting blade 56a / 56a (FIG. 1) at the tip of the opening side wall 55a / 55a and a lower cutting blade 56b (FIG. 1) at the tip of the bottom surface 53a.

  The cutting blade 56 employs a so-called known clipper-type reaper in which two blades swing relative to each other. When the operation column 82 is operated by the operator, a head knife motor (not shown) is driven and the blade reciprocates to cut water plants.

  The take-in conveyor 54 is arranged inside the bottom surface 53 a of the bucket 53. A stainless steel mesh chain forms an endless conveyor belt, which is driven by a pair of conveyor rollers (not shown) and conveys the harvested aquatic plants to the storage section 6 under the cab 8 in the center of the hull. ..

<Store>
In the storage unit 6, a transfer conveyor 60 having the same configuration as the intake conveyor 54 is arranged. The transport conveyor 60 further transports the cut waterweed transported by the intake conveyor 54 to the rear side. At this time, when the carry-out section 7 is not performing the carry-out operation, the transport of the waterweed carried by the transport conveyor 60 is stopped at the boundary with the carry-out section 7, and the waterweed is stored in this portion.

<Unloading section>
The carry-out section 7 has a trough-like configuration formed so as to project rearward from the stern 42, and includes a bottom surface 70a and vertical side walls 70b / 70b formed on both sides of the bottom surface 70a. A shaft portion 73 whose one end is pivotally supported by a support portion (not shown) provided on the hull 4 is provided at the front lower end of the side wall 70b / 70b, and a rear portion of the carry-out portion 7 rotates the shaft portion 73. It is swingably supported upward as a center.

  Further, a rod-shaped support member 74 protruding vertically in a direction orthogonal to the longitudinal direction of the side wall 70b is attached to the center of the outside of the side wall 70b / 70b, and a support portion 75 provided at the upper end of the support member 74 is attached to the support portion 75. The upper end of the carry-out conveyor cylinder 72 is pivotally supported, and the lower end of the carry-out conveyor cylinder 72 is pivotally supported by the support portions 76 provided on the left and right of the upper surface 45 of the stern 42. Therefore, when the carry-out conveyor cylinder 72 extends, the rear end of the carry-out section 7 is displaced upward with the shaft 73 as the center of rotation, and when the carry-out conveyor cylinder 72 contracts, the rear end of the carry-out section 7 is parallel to the upper surface 45 of the hull 4. Displace downward until.

A carry-out conveyor 71 is arranged on the bottom surface 70a. The carry-out conveyor 71 basically transports water plants with the same configuration as the intake conveyor 54 and the transport conveyor 60.
<Cab>
The cab 8 is configured to straddle the storage unit 6 left and right. Therefore, it does not matter that the transport conveyor 60 transports and stores the water plants. A machine room 9 is provided at the rear of the cab 8 and houses an engine and a hydraulic pump (not shown). A driver's seat 81 is provided in front of the machine room 9, a chair on which an operator is seated is provided, and an operation column 82 for controlling a hydraulic circuit is operably arranged in front of it. In front of it, a safety fence 83 for safety is arranged.

<Paddle part>
Propulsion paddles 2/2 are arranged on the starboard 43 and port 44 of the upper surface 45 of the hull 4.

  A paddle motor 13 is connected to the paddle wheel 10. The paddle wheel 10 is rotatably attached to the attachment portions 16 of the starboard 43 and the port 44 of the upper surface 45 of the hull 4 via the support shaft 15 in a horizontal position and a vertical position. The paddle cylinder 14 is mounted between the upper portion of the support shaft 15 in the width direction and the upper portion of the mounting portion 16. For this reason, when the paddle cylinder 14 extends, the support shaft 15 is displaced horizontally, and the paddle wheel 10 comes into contact with the water surface to propel the water grass cutting ship 1. On the other hand, when the paddle cylinder 14 contracts, the support shaft 15 is flipped up vertically so that the paddle wheel 10 does not project to the port side.

<Paddle wheel>
FIG. 5 is a perspective view of the paddle wheel 10 seen from the outside, and FIG. 6 is a perspective view of the paddle wheel 10 seen from the hull 4 side. Further, FIG. 7 is an exploded perspective view of the paddle wheel 10.

  As shown in FIG. 7, the paddle wheel 10 has a hexagonal plate-shaped center disk 10d connected to and driven by the hub 13a at the center thereof. The center disk 10d is formed with six bolt insertion holes 10g into which the hub bolts 13b are inserted at the center.

  Spokes 10e, which are power transmission members linearly extending in the radial direction in the direction opposite to the normal rotation, are arranged along each side of the center disk 10d. The inner base end portion of each spoke 10e is fixed to another adjacent spoke 10e. Therefore, the six spokes 10e are integrated.

The tip of each spoke 10e is fixed to the central portion of the connecting member 10f parallel to the rotation axis.
Both ends of the connecting member 10f are fixed to respective vertices of the outer wheel 10b on the outer side and the inner wheel 10c on the inner side (the hull side).

  The outer wheel 10b and the inner wheel 10c are plate-shaped members having a hexagonal outer shape, and have a large circular opening in the center. The outer wheel 10b is provided with a circular water inlet 10h near each vertex.

  One side in the width direction of the paddle member 10a having a rectangular plate shape for scratching water is fixed along the connecting member 10f, and the central portion in the width direction of the paddle member 10a is fixed to the spoke 10e. The other two opposite sides of the paddle member 10a are in close contact with the outer wheel 10b and the inner wheel 10c. Therefore, when the paddle wheel 10 rotates forward, there is a space in which water can be stored in the space surrounded by the paddle member 10a, the outer wheel 10b, and the inner wheel 10c.

<Paddle motor>
As shown in FIG. 7, the paddle motor 13 which is a hydraulic motor as a driving means has a disk-shaped hub 13a mounted on its rotary shaft, and has six parallel shafts parallel to the motor rotary shaft of the paddle motor 13 for driving the center disk 10d. The hub bolt 13b is arranged on the hub 13a. The hub 13a rotates in synchronization with the paddle motor 13.

  The paddle wheel 10 is mounted on the hub 13a. Specifically, the hub bolt 13b of the hub 13a is inserted into the bolt insertion hole 10g of the center disc 10d of the paddle wheel 10 via the shock absorber 11. Furthermore, the hub bolt 13b penetrates the paddle fixing plate 12, and the tip thereof is screwed by the wheel nut 13c.

  The hub 13a, the shock absorber 11, the center disk 10d, and the paddle fixing plate 12 are integrally fixed by screwing the wheel nut 13c, and the rotation of the paddle motor 13 is transmitted to the paddle wheel 10.

<Operation of Embodiment>
The operation of the paddle wheel 10 of the water grass cutting ship 1 configured as described above will be described with reference to FIGS. 8 to 12 and in comparison with the comparative example shown in FIGS. 13 to 15.

  It is the figure which looked at the paddle wheel 10 of the present invention shown in FIG. 8 from the outer side of the water grass cutting ship 1, but in order to explain the effect | action of this invention, the paddle member 10a and the connection member 10f inside the paddle wheel 10 are see-through. I draw so that I can do it.

  For convenience of description, in FIGS. 8 to 12, only the operation of the specific paddle member 10a (1) and the paddle member 10a (2) following this during normal rotation will be focused and described. The description of the other paddle members 10a is omitted.

  In FIG. 8, the rightward arrow at the top indicates the forward direction of the water grass cutting ship 1. The two clockwise arrows on the paddle wheel 10 indicate the direction of normal rotation of the paddle wheel 10. FIG. 8 conveniently shows the start state (initial position) of the paddle member 10a (1) in this explanation, and the paddle member 10a (1) is still in a state before landing. In this state, the water-free space E due to the paddle member 10a (1) does not exist.

  FIG. 9 shows a state in which the paddle wheel 10 of FIG. 8 has rotated 30 ° to the right. At this time, the paddle member 10a (1) enters the water from the water surface WL. The arc indicated by the two-dot chain line indicates the locus of the outer circumference of the paddle wheel 10. When the paddle member 10a (1) enters the water, the water is vigorously scraped away, and where the paddle member 10a (1) passes, the water is removed along the trajectory of the paddle member 10a (1), and there is no water. A space E is created.

  FIG. 10 shows a state in which the paddle member 10a (1) has rotated 60 ° from the start and is further immersed in water. At this time, the paddle member 10a (1) scrapes water away along the locus and further expands the water-free space E. At the same time, the surrounding water flows in to fill the space E.

  FIG. 11 is a cross-sectional view of only the portion AB in FIG. 10 seen from the direction A. The paddle member 10a (1) separates water along the locus thereof and further expands the water-free space E. At the same time, the surrounding water flows in to fill the space E.

  First, in the water-free space E, inflow water W2, W3 flows in from the outer circumferences of the outer wheel 10b and the inner wheel 10c in addition to the water flowing from below so that the dented water surface rises again.

  However, since the paddle wheel 10 is rotating at a high speed, centrifugal force CF acts on the water between the outer wheel 10b and the inner wheel 10c toward the outer side in the radial direction, so that it is difficult for water to enter from below. Not only that, but rather, it becomes a force for maintaining or expanding the space E depending on the speed. Therefore, the inflow of water from below into the water-free space E cannot be expected depending on the rotation speed of the paddle wheel 10.

  However, in the present invention, since the outer wheel 10b is provided with the water intake port 10h, the water is absorbed from the water intake port 10h by the paddle member 10a (1) into the space E which is negative pressure. Inflow water W1 often flows in. Since the water suction port 10h is not formed in the inner wheel 10c, water does not flow laterally to the inner wheel 10c side of the space E, so that the space E without water remains.

  FIG. 12 shows a state in which the paddle member 10a (1) has rotated 90 ° from the start. In this state, half of the paddle member 10a (1) has already crossed the line of the water surface WL and has come out of the water. Strictly speaking, the water surface rises as if scooping water from the water, and it is a state where water droplets are splashed. In the space through which the paddle member 10a (1) passes, a sufficient amount of inflow water W1 flows into the space E from the water inlet 10h, and the space E without water almost disappears. As a result, the surface of the paddle member 10a (2) following the paddle member 10a (1) in the traveling direction is filled with sufficient water.

<Operation of Comparative Example>
FIG. 13: is a figure which shows the comparative example which does not have 10 h of water inlets. In order to compare the operation of the present embodiment with that of the present embodiment, the drawing is compared with FIG. 10 of the present embodiment. The outer wheel 10i of the comparative example is different from the present embodiment in that the outer wheel 10i is not provided with the water inlet 10h, but the other configurations are the same.

Compared with FIG. 10, in FIG. 13, the volume occupied by the water-free space E is larger. This is because there is no water flowing in from the water intake port 10h.
FIG. 14 is a diagram to be compared with FIG. 11 of the present embodiment, and is a diagram of only the C-D portion of FIG. 13 viewed from the C side. In the present embodiment shown in FIG. 11, since the outer wheel 10b of the present invention is provided with the water suction port 10h, from the water suction port 10h to the space E which is negative pressure by the paddle member 10a (1). Since the inflow water W1 flowed in so strongly that it was sucked in, the space E rapidly became smaller.

  However, since the outer wheel 10i of the comparative example does not have the water inlet 10h, water does not flow in from the outer wheel 10i, so that the space E without water is maintained larger. Further, since the paddle wheel 10 rotates at a high speed, centrifugal force CF acts, and depending on the speed, it may prevent water from entering from below or push back the water to expand the water-free space E.

  FIG. 15 is a diagram to be compared with FIG. 12 of the present embodiment. Although the paddle member 10a (1) is advanced by 90 ° from the start point, a large volume of water-free space E exists in the advancing direction of the paddle member 10a (2) following the paddle member 10a (1). Part of the water is eliminated.

<Comparison of Actions of Water Weeding Boat of Present Embodiment and Comparative Example>
Here, the propulsive force of the paddle wheel 10 is generated by the reaction force (reaction) of the force (action) of the paddle member 10a pushing water backward. The force with which the paddle member 10a pushes the water backward depends on the mass of the water pushing backward. That is, if there is a water-free space E behind the paddle member 10a, the mass will be smaller, and as a result, the water grass cutting ship 1 of the comparative example will rotate the paddle wheel 10 with the same power of the paddle motor 13. However, it is inferior in propulsive force to the aquatic weeding boat 1 of the present embodiment.

  As described above, since the water harvester 1 of the present embodiment is provided with the water intake port 10h on the outer wheel 10b of the paddle wheel 10, although it is propelled by the paddle wheel, it is better than the water harvester 1 of the comparative example. , Has a large propulsive force and can move at a relatively high speed.

<Effect>
The following effects can be obtained by the aquatic weeding ship of the above-described embodiment.
(1) By providing the paddle wheel 10 of the same size with the water inlet 10h, water is supplied to the water-free space E inside the paddle wheel 10 and the generation of the space E is suppressed. The mass of water scratched by 10a can be increased, and the propulsive force of the water grass cutting ship 1 can be improved.

(2) The existing paddle wheel can be easily replaced with the paddle wheel 10 of the present invention simply by forming the water inlet 10h on the outer wheel 10b of the paddle wheel 10.
(3) By improving the propulsive force of the water grass cutting ship 1, for example, it becomes possible to move at a higher speed on the water surface.

(4) Since the cutting blade can press the aquatic plant with a stronger force in the work of cutting aquatic plants, the efficiency of aquatic plant cutting can be improved.
(5) Further, even if the waterweed reaping boat 1 is subjected to a large running resistance due to waterweeds growing on the surface of the water, it is easy to escape due to the high propulsion force.

(6) Maintenance is unnecessary because there is no complicated structure such as a driving device such as a motor or a rotating mechanism.
(7) In addition, since the propulsive force is improved, no special energy is required, and there is an energy saving effect.

(Second embodiment)
<Characteristic structure>
Next, another embodiment of a water grass cutting ship embodying the present invention will be described with reference to FIGS. 16 (a) and 16 (b). The present embodiment is different only in that a slide type claw member is provided and the shape of the water suction port 10h, and other configurations are common, and therefore description thereof is omitted.

  As shown in FIG. 16 (b), the sliding claw 10 j that constitutes the protrusion mechanism of the present invention includes a slide bottom 10 k that constitutes a paddle member and a slide wall that extends the outer wheel 10 b and the inner wheel 10 c outward in the radial direction. With 10 l.

  Then, as shown in FIG. 16 (a), the slide walls 101/101 are arranged along the outer wheel 10b and the inner wheel 10c, and the slide bottoms 10k are arranged along the spokes 10e. A slide groove 10m opens along the end of the slide wall 10l on the slide bottom 10k side. In the slide type claw 10j, the slide pin 10n is inserted into the slide groove 10m through holes formed at predetermined positions of the outer wheel 10b and the inner wheel 10c, and the tip of the slide pin 10n slides inside the paddle wheel. It is fixed by 10o.

  The slidable pawl 10j configured as described above is housed inside the outer wheel 10b when the slide nut 10o is loosened and slid inward (referred to as a "storage position"). Further, when the sliding claw 10j is slid outward in the radial direction, the sliding bottom 10k projects and the slide wall 10l is arranged so as to extend the outer wheel 10b and the inner wheel 10c to the outside (referred to as a "use position"). ).

<Action>
The sliding claw 10j is stored in the storage position when the water harvesting boat 1 is transported, and when the paddle cylinder 14 is contracted and the support shaft 15 is flipped up vertically, the paddle wheel 10 does not project to the port side, which is smaller. It can be loaded into a transport vehicle.

  On the other hand, if the slide claw 10j is extended to the use position and the position is fixed by tightening the slide nut 10o, the water can be scratched by the slide bottom 10k having a paddle member water scratching function with a radius R2 larger than the radius R1. ..

  At this time, along with the slide bottom 10k, the slide wall 10l along the slide bottom 10k and the both ends thereof is continuously scratched by the outer wheel 10b and the inner wheel 10c to obtain a larger propulsive force. it can.

In this case, as in the first embodiment, when water is scraped off from the water surface by the slide bottom 10k, a water-free space B having a volume larger than that in the first embodiment is temporarily formed.
In the second embodiment, a water intake port 10p formed by a cutout is provided instead of the circular water intake port 10h of the first embodiment. The function thereof is that, similarly to the water intake port 10h (see FIG. 5) of the first embodiment, it has a function of quickly filling the space B without water from the lateral direction with water. Therefore, the sliding bottom 10k can secure an effective propulsive force even with a larger radius.

<Effect>
In addition to the effects (1) to (7) of the first embodiment, in the aquatic weeding ship of the second embodiment, (8) the sliding claw 10j is stored in the storage position, so that the protrusion is formed as in the first embodiment. You can get rid of things and make it more compact during transportation.

(9) Since the water can be scratched with a larger radius by setting the slide claw 10j to the use position, a larger propulsive force than that in the first embodiment can be obtained.
(10) Even with such a large radius, since water can be supplied from the lateral direction by the water intake port 10p, it is possible to suppress the generation of the water-free space B and secure the propulsive force.

(11) Since the water intake port 10p is notched, it can be easily processed.
<Examples of changes>
The above embodiment may be modified as follows.

The water suction port 10h of the present embodiment is illustrated as a circular window shape as illustrated, but the size thereof is not necessarily limited to that of the first embodiment.
Although the water inlet 10h of the present embodiment is exemplified by a circular window shape, its shape is not necessarily limited to a circular shape. For example, an opening such as an ellipse or a streamline may be used.

The position of the water suction port 10h can be optimized as appropriate such as the position in contact with the paddle member.
Although the water inlet 10h of the first embodiment is a window-shaped one, the water inlet 10p of the notch formed in the rear of the paddle member 10a of the outer wheel 10b shown in the second embodiment in the rotational direction is shown. Such a configuration may be used. Further, the notch may be a notch from the inside of the outer wheel 10b instead of the outside.

  The water intake port 10h of the present embodiment is provided only on the outer wheel 10b side, but can also be provided on the inner wheel 10c side. Moreover, you may provide in either the outer wheel 10b, the inner wheel 10c, or both.

The outer wheel 10b and the inner wheel 10c in the present embodiment are regular hexagonal ones, but they may be other regular polygonal ones or circular ones.
The outer wheel 10b and the inner wheel 10c of the present embodiment have a donut shape in which the circumference of the rotation shaft is open, but may be a plate shape in which the circumference of the rotation shaft is closed.

In the embodiment, the paddle wheel ship is described as an example, but the paddle wheel can also be used for the paddle wheel ship.
The drive of each equipment is not limited to the hydraulic circuit, and may be drive by an internal combustion engine or electric drive.

○ Propulsion means may be not only paddle wheels but also screw propulsion, wind power propulsion, water jet propulsion, and the like.
The embodiment has described the paddle wheel of the present invention by taking the water grass cutting ship 1 that can be most preferably implemented as an example. However, the embodiment is not limited to the water grass cutting ship and is widely used for propulsion of ships and the like. be able to.

  It should be noted that the present invention is not construed as being limited to the above-described embodiments, and it is needless to say that a person skilled in the art can add, delete, replace, and modify the embodiments without departing from the spirit of the present invention. ..

DESCRIPTION OF SYMBOLS 1 ... Aquatic mowing ship, 2 ... Paddle part, 4 ... Hull, 5 ... Mowing head, 6 ... Storage part, 7 ... Unloading part, 8 ... Driver's cab, 9 ... Machine room, 10 ... Paddle wheel, 10a ... Paddle member, 10b ... Outer wheel, 10c ... Inner wheel, 10d ... Center disk, 10e ... Spoke (power transmission member), 10f ... Connection member, 10g ... Bolt insertion hole, 10h ... Water inlet, 10i ... Outer wheel (comparative example), 10j ... Sliding claws, 10k ... Sliding bottom, 10l ... Sliding wall, 10m ... Sliding groove, 10n ... Sliding pin, 10o ... Sliding nut, 10p ... Water inlet, 13 ... Paddle motor (driving means), 13a ... Hub, 14 ... Paddle cylinder, 15 ... Support shaft, 16 ... Mounting part, 41 ... Bow, 42 ... Stern, 43 ... Starboard, 44 ... Port, 45 ... Top surface, 51 ... Supporting part, 52 ... Frame 53 ... bucket, 54 ... intake conveyor 55 ... opening, 55a ... opening side wall, 56 ... cutting blade, 60 ... conveyor.

Claims (8)

A pair of paddle wheels used to propel a ship,
A hub that is fixed to the drive means and is rotatable,
A power transmission member composed of spokes or disks radially provided from a hub driven by the hub,
A paddle member provided at the tip of the power transmission member to scratch the water surface to obtain a propulsion force;
A pair of plate-shaped wheels provided so as to sandwich the paddle member,
Equipped with
The paddle wheel, wherein the wheel is provided with a water inlet for absorbing water from the outside to the inside of the paddle wheel below the waterline on the side opposite to the normal rotation direction of the paddle wheel of the paddle member.   The paddle wheel according to claim 1, wherein the water suction port is provided only on the outer wheel.   The paddle wheel according to claim 1 or 2, wherein the water inlet has a circular shape.   The paddle wheel according to any one of claims 1 to 3, wherein the wheel has an opening in a central portion around a rotation axis.   The paddle wheel according to any one of claims 1 to 4, wherein the wheel has a regular polygonal shape when viewed from the rotation axis direction.   The paddle wheel according to any one of claims 1 to 5, wherein the paddle member includes a protrusion mechanism that slides on the outer periphery of the wheel to protrude.   The paddle wheel according to claim 6, wherein the paddle member includes a slide wall continuous with the wheel.   An aquatic weeding boat provided with the paddle wheel according to claim 1.