JP3818429B2 - Boat berthing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a berthing device from the shore of a boat, and more particularly, to a berthing device such as a landing craft directly boarded on the shore.
[0002]
[Prior art]
Conventionally, landing boats have directly boarded the coast and tilted the movable bridge from the bow to land loaded vehicles and crew. And when the anchor ring is taken offshore in advance, and when leaving the beach, etc., reverse the water jet propulsion water jet to obtain the propulsive force in the reverse direction, and pull the anchor rope connected to the anchor ring. I wound up and left the shore.
[0003]
[Problems to be solved by the invention]
The task of lowering the anchor ring offshore in advance and winding the anchor rope while leaving the shore while leaving the boat off the shore was cumbersome and could not be said to be an appropriate method in case of emergency. It is an object of the present invention to provide a device for separating from a coast such as a sand beach such as a landing boat.
[0004]
[Means for Solving the Problems]
The gist of the present invention is that in a boat having a water jet propulsion device disposed on the stern bottom and a movable bridge provided on the bow, a hydraulic cylinder is disposed on the boat bottom near the bow. Projecting from a through hole provided at the bottom of the bow of the bow, connecting a drive plate disposed along the front of the bow to the piston, and slidably disposed at the front of the bow. If the piston of the hydraulic cylinder is extended after landing on a sandy beach or the like, the driving plate can be pushed against the sandy beach to push the boat back in the sea. If the drive plates are provided on the left and right in the vicinity of the bottom of the bow, the force to push back the boat can be given in a well-balanced manner.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The landing berthing device for a landing craft according to the present invention is configured as described above, and it is movable after the boat is directly boarded on a beach such as a sandy beach, and a loaded vehicle or crew is landed to finish the work. The bridge is raised to the bow, the piston of the hydraulic cylinder is extended, the drive plate is slid toward the coast, the pressurized water of the water jet is reversed and sprayed in the reverse direction of the boat. Next, the piston is contracted, the drive plate is retracted, and the drive plate is slid toward the coast in a state where the piston is moved backward again, and the boat is moved backward by the water jet. By repeating this operation, the boat can be taken off the coast. And when sliding a boat, if a drive plate is closely_contact | adhered to the front surface of a bow, it will not become water flow resistance.
[0006]
【Example】
The landing berthing device of the present invention will be described in detail based on the embodiment. First, FIG. 1 shows a craft equipped with a berthing device, in which a water jet propulsion in which an engine 2 is directly connected to a stern 1a. A machine 3 is provided. As shown in FIG. 2, the water jet propulsion device 3 pressurizes water sucked from the suction port 4 a of the suction casing 4 opened in the ship bottom 1 b by the impeller 6 of the pump casing 5, and discharges it from the injection nozzle 7 a of the discharge casing 7. The water is sprayed with pressurized water. Then, the deflector 8 pivotably connected to the rear end of the discharge casing 7 is rotated left and right with the operating rod 9 to switch the traveling direction, and the reverser 10 provided behind the deflector 8 is rotated up and down. The jet water from the jet nozzle 7a is reversed into the water in the bow direction so that the boat 1 moves backward. Reference numeral 11 denotes a guide vane for making the swirl flow pressurized by the impeller 6 into a linear flow.
[0007]
As shown in FIGS. 1 and 3, the boat 1 has a bottom 1b as a flat bottom and a bow 1c inclined forward to form a box shape so that the boat 1 can be directly boarded on the sandy beach A. . A movable bridge 13 is pivotally attached to the upper half of the bow 1c, and the movable bridge 13 is tilted from the boat 1 that has been aboard the sand beach A to be bridged to the sand beach A. A hydraulic cylinder 14 supported by a frame 12 is horizontally disposed on the bottom 1b near the bow 1c, and a piston 15 of the hydraulic cylinder 14 projects from a through hole 1d provided at the bottom of the bow 1c. The drive plate 16 is connected to the tip of the piston 15. The piston 15 of the hydraulic cylinder 14 is expanded and contracted to slide the drive plate 16 back and forth.
[0008]
The drive plate 16 has a shape in which the tip end surface is inclined along the lower half of the bow 1c. When the piston 15 is contracted, the tip end of the drive plate 16 becomes equal to the outer peripheral surface of the bow 1c. Is extended from the outer peripheral surface of the bow 1c. Then, as shown in FIG. 3, the driving plate 16 is pressed against the sand of the sandy beach A, and the boat 1 is pushed back to the sea by the reaction force, and the driving plate 16 is continuously slid forward and backward. At the same time, the water jet propulsion machine 3 is reversed by the reverser 10 so that the boat 1 is detached from the shore by the reaction force that presses the drive plate 16 against the sand of the sand beach A and the thrust that causes the boat 1 to retreat. It is. In the embodiment shown in FIG. 4, the drive plates 16 are provided on both sides of the bow, and the force to push the boat 1 back to the sea from both sides of the boat 1 can be applied in a well-balanced manner, so that the boat 1 can easily leave the shore. Is.
[0009]
【The invention's effect】
The berthing device for a boat according to the present invention is configured as described above, and if the thrust of the water jet propulsion device is used while sliding the drive plate back and forth, the berthing of the boat is performed. . In other words, in the conventional landing craft, the anchor ring was lowered offshore and the craft was taken off while winding the anchor rope. The driving plate is pushed against the sand on the sandy beach from the bow that rides on the sandy beach while applying the reverse thrust to the sandy beach, and the boat is pushed back to the sea by the reaction force. is there.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of a boat provided with a water jet propulsion device and a berthing device according to the present invention.
FIG. 2 is a longitudinal side view of a water jet propulsion device used in the boat according to the present invention.
FIG. 3 is a side view when the driving plate of the banking device is pressed against the sand beach.
FIG. 4 is a plan view of the rip-off device installed in the boat.
[Explanation of symbols]
1 boat 1a stern 1b ship bottom 1c bow 1d through hole 3 water jet propulsion machine 13 movable bridge 14 hydraulic cylinder 15 piston 16 drive plate

Claims (2)

In a boat (1) in which a water jet propulsion device (3) is arranged on the bottom (1b) of the stern (1a) and a movable bridge (13) is provided in the upper half of the bow (1c), the vicinity of the bow (1c) A hydraulic cylinder (14) is disposed on the bottom of the boat, and a piston (15) of the hydraulic cylinder (14) is projected from a through hole (1d) provided in the bottom of the bow (1c), and the bow (1c A driving plate (16) disposed along the front surface of the boat) is connected so that the driving plate (16) is slidable forward of the bow. The berthing device for a boat according to claim 1, wherein the drive plates (16) are provided on the left and right sides of the bow (1c).

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