JPH04269209A - Boat hoisting device - Google Patents

Abstract

PURPOSE:To perform the hoisting work while a boat is directed perpendicularly to the longitudinal direction of a jib. CONSTITUTION:A jib 3 is rotated and protruded above the water, and wire ropes 11, 12 are unwound by hoisting devices 13, 14 to lower hoisting accessories 10. Slings 16, 17 fitted to the hoisting accessories 10 are crossed in the width direction of the outside bottom section of a boat 15 directed perpendicularly to the jib 3 to hold the boat 15 at the front and rear positions. Slides 6, 7 are moved by hydraulic cylinders 8, 9 in the longitudinal direction of cross beams 4, 5, and the width size A between hoisting positions is adjusted in response to the shape and length of the boat 15. The wire ropes 11, 12 are wound by the hoisting devices 13, 14 to hoist the boat 15. The jib 3 is turned to the land side under this condition, and the boat 15 is lowered on a quay 1 for landing. The boat 15 is launched from the ground by opposite actions.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boat lifting and lowering device for lifting and lowering watercraft such as boats from water to land, or from land to water at anchorage ports (marinas).

0002

2. Description of the Related Art FIGS. 3 and 4 show an example of a conventional watercraft lifting and lowering device, in which a two-pronged jib c that can be rotated horizontally is mounted on the top of a fixed post b erected on a quay a. installed,
A hydraulic cylinder d is installed at each front end of the bifurcated jib c.
A sheave e is provided which is movable in the longitudinal direction of the jib c, and a fixed sheave f is provided at the rear of the sheave e.

[0003] Furthermore, both ends of band-shaped slings h and i, which are spread in the width direction of the outer bottom of the boat g moored on the water and can hold the boat g at two places in the front and back, are attached to each of the sheaves e. , f and a wire rope k hanging down through
, l by a hanging device j.

The wire ropes k and l are held so as to be able to be wound and unwound by a winch m or n, which has one end fixed to a fixed part x and the other end provided at a predetermined position on the jib c. , n by winding up and unwinding them, the hanging tool j can be raised and lowered.

[0005] When a boat g moored on the water is to be unloaded, the hoisting j is lowered by winches m and n, and the two slings h and i attached to the hoisting j are attached to the boat. The boat g is held across the width direction of the outer bottom of the wire ropes k and l, and then the wire ropes k and l are connected to the winches m and n.
The boat g is hoisted from the water by being reeled in, and the jib c is turned to the land side to suspend the boat g onto the land.

[0006] Furthermore, when the boat g on land is to land on the water, the operation opposite to the above may be performed.

[0007] Depending on the shape of the boat g, the captain, etc., the front sheave e is moved using a hydraulic cylinder d, and the width dimension A of the hanging position is changed as appropriate.

[0008]

[Problems to be Solved by the Invention] However, with the above conventional device, the boat g cannot be lifted or lowered unless the boat g and the jib c are in the same direction. However, there was a problem in that the boat g became unstable due to river currents, waves on the sea surface, etc., and it took a lot of time to lift and lower the boat g, and the lifting and lowering operations were dangerous.

For example, when lifting and lowering a boat g moored on a river, the boat lifting and lowering device will be installed on the riverbank, so the boat g should be moved in the same direction as the jib c turned on the water as shown in the figure. , the boat g will be subject to the river flow from the side, making it difficult to maintain a stable state.

Originally, in order to stabilize the boat g in such a case, it is desirable to orient the boat g in the direction of the flow of the river, but in this case, the direction of the boat g should be perpendicular to the jib c. As a result, it becomes impossible to lift and lower the boat g.

The present invention has been made in view of the above-mentioned circumstances, and provides a boat lifting and lowering device that can perform lifting and lowering operations while the boat is oriented at right angles to the jib, thereby reducing the amount of time required for lifting and lowering operations. The purpose is to save time and improve safety.

0012

[Means for Solving the Problems] The present invention includes a fixed post erected on a quay wall, a jib that can be rotated horizontally on the upper part of the fixed post, and a jib that can be rotated horizontally at a predetermined position of the jib in the longitudinal direction of the jib. Two cross beams extending in a right angle direction are provided at a required interval from each other, and hanging tools are suspended and supported at both ends of each cross beam so as to be movable up and down, and between the hanging tools facing each other in the longitudinal direction of the jib,
A sling is attached across the width of the outer bottom of the watercraft so that the watercraft can be held at two locations, front and back, and the hanging position of each of the hanging devices is configured to be movable in the longitudinal direction of each of the cross beams. This relates to a boat lifting and lowering device characterized by:

[0013]

[Operation] When landing a boat moored on the water, turn the jib so that it protrudes above the water, lower the sling, and point the sling attached to the sling in a direction perpendicular to the jib. The boat is held in two places, front and back, across the width direction of the outer bottom of the boat, and then the boat is hoisted up, the jib is turned to the land side, and the boat is suspended onto a quay.

[0014] Furthermore, when landing a watercraft on land, the operation opposite to the above is performed.

Further, depending on the shape of the boat, the captain, etc., the hanging position of each hanging tool is moved in the longitudinal direction of each cross beam to adjust the width of the hanging position.

[0016]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the boat lifting and lowering device of the present invention.

A fixed post 2 equipped with a swing drive device (not shown) is erected on the quay 1, and a jib 3 is provided on the top of the fixed post 2, which extends horizontally and is pivotable in the horizontal direction.

A longitudinal direction (
Two cross beams 4 and 5 are provided that extend perpendicularly to the left and right direction in FIG.
Hydraulic cylinders 8, 9 are provided at both ends of each cross beam 5, with slides 6, 7 movable in the longitudinal direction of each cross beam 4, 5, and each slide 6, 7 is disposed on the top of each cross beam 4, 5. connect,
The respective slides 6, 7 can be adjusted to appropriate positions in the longitudinal direction of the respective cross beams 4, 5 by the expansion and contraction operations of the respective hydraulic cylinders 8, 9.

Furthermore, each of the slides 6 and 7 is provided with a hanging tool 10.
A boat 15 moored on the water is fitted with elevating devices 13 and 14 that hold hanging wire ropes 11 and 12 so as to be able to be wound up and unwound. Band-shaped slings 16 and 17 are installed across the width direction of the outer bottom of the boat 15 so as to be able to hold the boat 15 at two locations, front and rear.

[0021] When the boat 15 moored on the water is to be landed, the jib 3 is rotated to protrude above the water, and the wire ropes 11 and 12 are unwound by the lifting devices 13 and 14, and the lifting equipment is 10 is lowered, and the slings 16 and 17 attached to the hoist 10 are passed in the width direction of the outer bottom of the boat 15, which is oriented perpendicularly to the jib 3, and when it is lifted, the boat 15 is held in two places, front and back. It can be so.

At this time, by moving each slide 6, 7 using the hydraulic cylinders 8, 9, the width dimension A of the hanging position, that is, the distance between the slings 16, 17, is adjusted according to the shape of the boat 15, the captain, etc. , to prevent the boat 15 from tilting when lifted.

Next, when the wire ropes 11 and 12 are hoisted up by the lifting devices 13 and 14, the boat 15 is lifted up as shown.

In this state, the jib 3 is turned to the land side,
The boat 15 is lowered onto the quay 1 and landed.

[0025] When the boat 15 on land is to land on the water, the operation opposite to the above is performed.

As described above, according to this embodiment, the lifting and lowering operations can be carried out with the boat 15 facing perpendicularly to the jib 3.
Even if waves are hitting from a direction perpendicular to the boat 15 or a current is occurring in the direction perpendicular to the boat 15,
can be maintained in a stable state, reducing the time required for lifting and lowering operations and greatly improving safety.

[0027] In the above-mentioned embodiment, a structure is adopted in which a lifting device for raising and lowering the hanging equipment is directly attached to the slide provided on each cross beam, but instead of this, a sheave is provided on the slide. , the hanging equipment may be suspended and supported by a wire rope via the sheave, and the wire rope may be wound up and unwound by a lifting device placed at a desired position on the jib; It goes without saying that a yacht may be used, and that various other changes can be made without departing from the gist of the present invention.

[0028]

As explained above, according to the boat lifting and lowering device of the present invention, lifting and lowering operations can be performed while the boat is oriented at right angles to the jib. Even when waves are hitting from a direction perpendicular to the watercraft, or when a current is occurring in the direction perpendicular to the boat, the boat can be maintained in a stable state, reducing the time required for lifting and lowering the boat, and improving stability. It is possible to achieve various excellent effects such as a significant improvement.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of the invention.

FIG. 2 is a view taken along arrow II-II in FIG. 1;

FIG. 3 is a side view showing a conventional example.

FIG. 4 is an arrow view in the IV-IV direction of FIG. 3;

[Explanation of symbols]

1 Quay 2 Fixed post 3 Jib 4,5 Cross beam 10 Hanging equipment 15 Boat 16,17 Sling

Claims (1)

[Claims] Claim 1: A fixed post is erected on a quay wall, a jib is provided on the upper part of the fixed post, and a jib is provided at a predetermined position of the jib, extending in a direction perpendicular to the longitudinal direction of the jib.
Cross beams are provided at a required interval from each other, and hanging devices are suspended and supported at both ends of each of the horizontal beams so that they can be raised and lowered, and between the hanging devices facing each other in the longitudinal direction of the jib, the width of the outer bottom of the boat is The boat lifting device is characterized in that a sling is attached so that the boat can be held in two places, front and back, by being spread in different directions, and the hanging position of each of the hanging devices can be moved in the longitudinal direction of each of the horizontal beams. Descending equipment.