JPH021355Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a winch for operating a gangway attached to a ship.

(Conventional structure and its problems) Conventionally, as shown in Figure 7, the elevating and retracting of the gangway has been carried out by installing a winch a at a suitable location on the ship and using a wire wound around the drum b of the winch a. C is connected to gangway d via davit e, and winch a is operated.

However, according to such a structure, since winch a is installed on the ship, installation work and installation area are required in a limited place, and in addition, the wire c from winch a to davit e is required. There was a problem in that the work space was narrowed because it required the installation of cables.

(Purpose of the invention) In order to eliminate such problems, this invention
To provide a winch for operating a gangway, which is directly mounted on a davit without installing the winch on board a ship, and enables smooth operation of raising, lowering, and undulating the gangway.

(Structure of the invention) In order to achieve the above object, the winch for gangway operation of the invention includes a davit 1 and a motor 2.
A planetary gear mechanism 5 is provided in which the input gear 7 at the center is rotationally driven, and the rotation center shaft 10 of the gangway hoisting wire winding drum 14 is connected to the internal gear 9 of the planetary gear mechanism 5. The present invention is characterized in that a rotational center shaft 10 of a drum 13 for winding up a gangway stowing wire is connected to a rotational support member 11 that rotatably supports a gear 8.

(Function) When the motor 2 is driven to rotate, as shown in FIGS. 3 and 6, due to the difference in tension between the hoisting wire 17 and the stowing wire 19, the hoisting wire 17 having a lower tension is connected to the winding drum 14. The internal gear 9 rotates to raise the gangway 18.

Next, when the gangway 18 rises and comes into contact with the lower surface of the davit 1, the tension of the hoisting wire 17 becomes greater than the tension of the stowing wire 19, and this time the winding drum 13 of the stowing wire 19 is
The planetary gear 8 connected to the winding drum 13 rotates and the stowing wire 19 rotates.
is wound up, and the davit 1 is raised and rotated to be stored.

When lowering the gangway 18, the operation described above is reversed.

(Explanation of Embodiments) The embodiments of the present invention will be explained with reference to the drawings.
is a davit whose base end is pivotally attached to the upper surface of the hull side wall so as to be freely rotatable in the vertical direction, and whose tip protrudes forward from the hull side wall.As shown in FIG. A gear train storage case body 3 is attached via a bracket 4.

Reference numeral 5 denotes a planetary gear mechanism provided inside the case body 3, and as shown in FIG.
7 is fixed to the input gear 7, and planetary gears 8, 8, 8 are meshed with three sides of the input gear 7, and these planetary gears 8, 8, 8 are meshed with an internal gear 9 disposed on the outer periphery of the planetary gears 8, 8, 8. .

Reference numeral 10 denotes a rotation center shaft rotatably inserted and supported between both side walls of the base of the davit 1, and the planetary gears 8,
8, 8 rotatably supported by the rotation support member 11, and the rotation center shaft 1 is fitted with a key or the like.
It is integrally connected to 0.

Reference numeral 12 denotes a rotation transmitting cylinder member integrally connected to the internal gear 9, which penetrates one side wall of the davit 1, protrudes into the side wall, and is rotatably fitted onto the rotation center shaft 10.

Reference numeral 13 denotes a drum for winding up the gangway stowing wire, which is fixed to the tip of the rotation center shaft 10 protruding from the other side wall of the davit 1.

Reference numeral 14 denotes a drum for winding up ladder hoisting wire, which is disposed between both side walls of the davit 1 so as to be rotatable around the central axis of rotation 10, and whose center portion at one end is integrated with the outer peripheral portion of the tip of the rotation transmitting cylinder member 12. The center portion of the other end is rotatably supported by the rotation center shaft 10.

Reference numerals 15 and 16 refer to pulleys rotatably supported in the davit 1 at appropriate intervals in the length direction of the davit 1, and a hoisting wire 17 wound around the drum 14 is stretched between the pulleys 15 and 16. 17 are suspended and connected to both sides of the tip of the gangway 18.

19 is the drum 1 for winding up the gangway stowing wire.
After wrapping the wire around the pulley 21 which is rotatably attached to the upper part of the gangway storage part 20 above the davit 1, the wire is wound around the davit 1.
It is connected to the top surface of the tip.

A worm gear 22 is fixed to the rotating shaft of the motor 2, and meshes with a worm wheel 23 fixed to the central shaft 6.

With the configuration described above, when the motor 2 is rotated when the gunwale 18 is raised from the lowered state, the rotation is transmitted to the central shaft 6 via the worm gear 22 and the worm wheel 23, and the planetary gear mechanism 5 is activated.

At this time, the hoisting wire 17 is connected to the gangway 18.
However, since the hoisting wire 19 supports the gangway 18 in a state where it is stretched diagonally upward from the davit 1 including its weight, the tension of the hoisting wire 19 is greater than that of the hoisting wire 17. There is a tension. Therefore, a larger load acts on the gangway hoisting wire winding drum 13 than on the gangway hoisting wire winding drum 14, and the rotational support member 11 of the planetary gear 8 connected to the rotation center shaft 10 of the drum 13 is affected. does not rotate, but the internal gear 9 rotates through the rotation of the planetary gear 8 rather than the rotation of the central shaft 6, and the hoisting wire winding drum 14 is rotated via the rotation transmission cylinder member 12 integrated with the internal gear 9. rotates and winds up the wire 17,
Raise gangway 18.

When the gangway 18 rises and touches the davit 1,
The hoisting wire 17 becomes locked without being wound any further, and the tension of the wire 17 becomes greater than the tension of the stowing wire 19, and the internal gear 9 becomes fixed, and the planetary gear 8
revolves, the gangway stowing wire winding drum 13 rotates via the rotating support member 11, and the davit 1 stands up, rotates, and retracts approximately 90 degrees.

Next, when the gangway 18 is lowered, the motor 2 is rotated in the opposite direction, and the stowing wire winding drum 13 begins to rotate.

This is because the tension of the hoisting wire 17 is almost no load when the davit 1 is erected at 90 degrees, whereas the tension of the hoisting wire 19 is almost no load.
This is because a negative load is applied to the tabito 1 to support it from falling.

Therefore, since the tension of the stowing wire 19 is smaller than the tension of the hoisting wire 17, the planetary gear 8 revolves while the internal gear 9 is fixed, and the stowing wire winding drum 13 rotates. David 1 falls down.

When the davit 1 stops in the horizontal position, the tension on the hoisting wire 17 becomes negative, and the internal gear 9 starts rotating. That is, the mechanism is such that the motor 2 with the smaller torque always rotates. As the internal gear 9 rotates, the hoisting wire 17 is rewound, and the gangway 18 is lowered to a predetermined position.

(Effects of the invention) As described above, according to the winch for gangway operation of the invention, since the winch is mounted directly on the davit 1 without being installed on the ship, it is possible to effectively utilize the space on the ship. The arrangement of operating wires, etc. can be simplified, and furthermore, the planetary gear mechanism 5 disposed on the davit 1 together with the motor 2 can be used as a differential device, and the internal gear 9 can be connected to the hoisting wire winding drum 14. The planetary gear 8 is connected to the stowing wire winding drum 13.
By connecting the two wires to each other, it is possible to wind up and unwind only the wire with the lower tension depending on the magnitude of the tension between both wires, and the elevating and lowering of the gangway and the raising and lowering of the davit can be performed reliably and smoothly.

[Brief explanation of the drawing]

Figures 1 to 6 show an embodiment of the present invention, where Figure 1 is a plan view, Figure 2 is a side view, and Figure 3 is a side view.
The figure is an enlarged sectional view, Figure 4 is a sectional view of the meshing part between the worm gear and worm wheel, Figure 5 is a sectional view of the planetary gear mechanism, Figure 6 is an explanatory diagram of the operation, and Figure 7 is an overall diagram of the conventional device. It is. 1 is a davit, 2 is a motor, 5 is a planetary gear mechanism, 7 is an input gear, 8 is a planetary gear, 9 is an internal gear,
10 is a rotation center shaft, 11 is a rotation support member, 13 is a drum for winding up the gangway hoisting wire, and 14 is a drum for winding up the gangway hoisting wire.

Claims (1)

[Scope of utility model registration request] The davit 1 is equipped with a motor 2 and a planetary gear mechanism 5 in which the input gear 7 at the center is rotationally driven by the motor 2. A winch for operating a gangway, characterized in that a rotation center shaft 10 of a drum 13 for winding up a stowing wire for the gangway is connected to a rotation support member 11 which connects a rotation center shaft 10 and rotatably supports a planetary gear 8.