JPS5848959Y2 - Self-aligning lifting device for ships - Google Patents

Description

[Detailed description of the invention] The present invention relates to a self-aligning hoisting device for a ship that can automatically align the center of the platform and the center of the ship's hull by utilizing the weight of the ship's body during hoisting work on the ship. be.

Conventionally, in the elevating work of mainly small vessels, as shown in FIGS. 1, 2, and 3, a front platform 3a for the elevating structure is movable on a rail 2 provided from the underwater side to the shore 1 side. While placing the bottom 4a of the hull 4 on the
Move it left and right as shown by arrows A and B in the figure, and set it to match the lead core of the front platform 3a.

Next, pull the stern 4c from the shore 1 side as shown by arrows C and D, or pull the buoy 6 connected to the anchor 5 by arrow E.
The stern 4c is moved left and right by pulling it as shown in the figure or by pulling it with the tugboat 7 as shown by the arrow F, and alignment is performed to eliminate the difference angle α between the lead core and the two directions of the rail.

While maintaining this state, the front platform 3a and the rear platform 3b connected to the platform 3a with a rope are moved forward while being pulled in the direction of arrow G in FIG. 2 to carry out hoisting. The attitude of the hull 4 is maintained by inserting sandbags 8 between the bottom 4a and each of the platforms 3a and 3b, as shown in FIG.

As mentioned above, conventional lifting work requires a tugboat 7 and a lot of manpower, which is extremely difficult work especially when the currents and winds are strong, and there is a problem in that it requires a lot of work time. .

Therefore, the present invention was devised to solve the above-mentioned conventional problems. The purpose of this is to automatically perform the process using the body's own weight, thereby quickly and accurately without requiring any human intervention.

That is, the present invention provides two left and right scissor members having contact parts with the keel part of the ship body on a platform for an overhead frame movable on rails, and is movable in a direction perpendicular to the direction of the rails. , a spring material is stretched between these two scissor members and the left and right ends of the platform, and furthermore, both left and right ends of a roller table that can move the bottom of the ship in a direction approximately perpendicular to the direction of the rails are provided. The roller table is constructed by supporting the two scissors via support members that allow the two scissors to move left and right depending on the weight of the ship applied to the roller table.

Embodiments of the present invention will be described below with reference to the drawings.
Components that are the same as those in the conventional example from the figures to FIG. 3 are indicated by the same part numbers.

First, in the self-aligning lifting device according to the embodiment of the present invention shown in FIG. 4 to FIG. A self-aligning device 9 as shown in the enlarged view of FIG.
The hull 4 is pulled forward in the direction of the arrow G when the hull 4 is pulled forward in the direction of arrow G. Two left and right scissor members 12 and 13 are provided movably by two rollers 16 and 17 in a direction perpendicular to the rail 2 direction.

Further, a roller 11 that can come into contact with the hull 4 is attached to the upper part of these scissor members 12 and 13, and a roller 11 that can come into contact with the hull 4 is further provided between the scissor members 12 and 13 and both left and right ends of the boat platform 3a (or 3b). Since the spring material such as a spring that is not used is stretched, the scissor member 12 in FIG. ing.

Further, both left and right ends of a roller table 22 having a plurality of rollers 21 capable of moving the bottom 4a of the hull 4 almost perpendicularly to the direction of the rail 2 (in the left-right direction in FIG. 5) are connected to a support stand 3a ( or 3b) with adjustment screws 2 on the left and right ends.
The other end of the stay 24 is rotatably supported by the roller 29 fixed at 0, and the other end of the stay 25 is rotatably supported by the roller 16 of the scissors member 12 (or 13) at one end. These two scissors are slidably supported in the left and right direction by rollers 23 that are rotatably connected to each other, and the weight W of the boat is applied from the bottom 4a of the boat 4 to the roller table 22 as shown by the arrow. These stays 24, 25 and rollers 16, 23, 29 constitute support members that allow the members 12 and 13 to move in the left and right directions of arrows R and R, respectively.

Therefore, to explain the operation of the automatic alignment device 90, when the hull 4 is being hoisted, when the hull 4 is held approximately on the platform 3a and the hull 4 is pulled as shown by the arrow G, the bow 4b
contacts the roller 21 of the automatic centering device 9 on the platform 3a.

When the hull 4 and the platform 3a are pulled forward, the weight W of the hull is increased by the roller 21. It is transmitted to the roller table 22, roller 23, stay 24.25, and roller 29.16.

Therefore, since the roller 29 is fixed with the adjustment screw 20, the rollers 23 and 16 move toward the inside of the platform 3a while rotating, and as a result, the scissor member 12 in FIG. 5 moves to the right side, and the scissor member 13 moves to the left, and their contact portions 14 contact the keel 4d of the hull 4.

Furthermore, as the hull 4 continues to be pulled up, the hull weight W applied to the automatic alignment device 9 increases, and the hull 4 is finally moved to the right (or left).

In this way, alignment is carried out until the keel 4d reaches the sleeper 10, and the centering of the hull 4 is almost aligned with the platforms 3a, 3b.
corresponds to the core of

Note that the automatic alignment device 9 fixed to the rear platform 3b also has the same configuration and function as described above, but each scissor member 1
2 and 13 are tensioned by an elastic material (not shown), so when the ship weight W is not applied, the scissor member 12
．． 13 is spread out on both sides.

On the other hand, in order to prevent the hull 4 from shifting backward, the roller 21 is provided with a groove 21a as shown in FIG.
d can easily move left and right, but cannot move forward or backward. Also, if the center of the body of the roller 21 is slightly inflated in a cylindrical shape, the difference in inclination between the hull 4 and the platforms 3a and 3b can be adjusted. Can be absorbed.

Note that the support members that allow the scissor members 12 and 13 to be moved left and right according to the weight W of the ship applied to the roller table 22 are not limited to the above embodiments, and any structure of the support members may be used. May be used.

Therefore, if the self-aligning hoisting device of the present invention is used to hoist a ship, the centering of the lead core and the platform will be done automatically using the ship's own weight, reducing the need for manpower. It has the advantage that it can be done quickly and accurately even in shipyards.

Further, there are advantages in that the above-mentioned work does not require a tugboat or a large number of manpower, which reduces work costs and reduces work time.

Note that the present invention can be effectively applied mainly as a floating device for relatively small ships.

[Brief explanation of the drawing]

Figure 1 is a plan view explaining conventional ship hoisting work, Figure 2
The figures are a side view of Fig. 1, Fig. 3 is a front view of Fig. 2, Fig. 4 is a side view illustrating the work of hoisting a ship in an embodiment of the present invention, and Fig. 5 is an automatic adjustment of Fig. 1. FIG. 6 is an enlarged front view of a partial cross section of the core device, FIG. 6 is a side sectional view taken along the line I--I in FIG. 5, and FIG. 7 is an enlarged side sectional view of the roller table shown in FIG. 2...Rail, 3a, 3b...Ship, 4...Hull, 4a...Bottom, 4d...
... Keel, 9 ... Automatic alignment device, 12
, 13... Scissor member, 14... Contact portion, 16, 17... Roller, 20...
Adjustment screw, 21...Roller, 22...
Roller table, 23...Roller, 24, 25
・・・・・・Stay 29・・・Roller, W...
...Hull weight.

Claims (1)

[Scope of utility model registration request] Two left and right scissor members having a contact portion with the keel of the hull are provided on a platform for an upper rack movable on the rails, and these two scissors members are movable in a direction perpendicular to the direction of the rails. A spring material is stretched between the scissor member and both left and right ends of the platform, and the left and right ends of a roller table that can move the bottom of the ship in a direction substantially perpendicular to the direction of the rails are attached to the rollers. A self-aligning floating device for a ship in which the two scissor members are supported via support members that are movable left and right depending on the weight of the ship applied to the table.