JPS6258958B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a walkway, and more particularly to a walkway for lifting and lowering personnel from a transportation ship to an offshore work platform used for oil drilling or the like.

When the transportation vessel that connects the offshore work platform and the shore is moored to the offshore platform, it constantly oscillates back and forth, left and right, and up and down due to waves or wind, and the relative position of the transportation boat and the work platform is unstable. change without change. Therefore, there is a need for a walkway that can reliably transfer personnel to a workbench even when there is a change in relative position.

Even if the relative position between an offshore work platform and a traffic vessel moored thereto constantly changes due to waves and strong winds, it is an object of the present invention to effectively absorb this and ensure that the traffic vessel is moored to the offshore work platform. The goal is to find a walkway to safely transfer people.

According to the present invention, the T-shaped post has a horizontal outrigger at the upper end and is rotatably attached at the lower end to a portion adjacent to one end of the deck and is raised and lowered within a vertical plane, and a track laid on the deck within the vertical plane. A first walkway having one end rotatably attached to a trolley traveling along the road and the opposite end crossing the post in an X-shape, one end being rotatable to the opposite end of the first walkway by means of a horizontal pin. a second walkway having an articulated joint having a vertical pin at a portion adjacent to one end thereof and extending outboard from the opposite end; A walkway is obtained consisting of a pair of control lines fixed to the section and guided to winches mounted on the deck on either side of the track via pulleys attached to each end of an outrigger on the post.

Now, an embodiment of the apparatus of the present invention will be described below with reference to the accompanying drawings.

Section 1.2. 3, there is shown an offshore work platform 12 and a traffic vessel 11 moored to the work platform 12 by means of the apparatus 10 of the present invention.

The device 10 of the present invention includes a T-shaped post 1 which has a horizontal outrigger 15 at its upper end, is rotatably attached at its lower end to a position adjacent to the right end of the deck 6, and is raised and lowered within a vertical plane. The lower end of the post 1 is rotatably connected to a bracket 7 on the deck 6 by a horizontal pin 8. As shown in FIG. 3, the post 1 is provided with an elongated hole 35 extending along its length. A pair of steel cables 16A, 16B suspended from a pair of pulleys 33A, 33B attached to an outrigger 15 of a post 1, respectively, are attached to struts 18A, 1.
It is guided to winches 17A, 17B on the deck via pulleys 26A, 26B on 8B. Therefore, the post 1 is raised and lowered between the use position shown in FIG. 1 and the storage position shown in FIG. 4 by the operation of the pair of winches 17A and 17B.

A track 5 is laid on the left side of the post 1 along the line of intersection between the deck 6 and the vertical plane on which the post 1 rotates around a horizontal pin 8. A truck 4 is mounted on a track 5 so as to be reciprocatable. A first walkway 2 made of a tubular member that is large enough for a person to pass through the inside.
The left end is rotatably attached to the trolley 4 by a horizontal pin 22. The right end of the first walkway 2 passes through the elongated hole 35 bored in the post 1, extends to the right side of the post 1, and intersects with the post 1 in an X shape.
A second walkway 3 having a predetermined length is rotatably connected at its left end to the right end of the first walkway 2 by a horizontal pin 20. The second walkway 3 therefore pivots in a vertical plane relative to the first walkway 2. The second walkway 3 includes a joint portion 21 having a vertical pin 21A at a position adjacent to the horizontal pin 20, so that the main part of the second walkway 3 can rotate approximately horizontally around the vertical pin 21A. has been made. Briefly, horizontal pin 20
The vertical pin 21A serves as a universal joint that connects the second walkway 3 to the first walkway 2. 1st walkway 2
The right end of the second walkway 3 and the left end of the second walkway 3 are flexibly connected by a bellows 34. The second walkway 3 is provided with a locking fitting 14 at the right end. A cradle 9 having a cradle 13 for locking a locking fitting 14 is an offshore workbench 12.
installed on. The traffic boat 11 is reliably moored to the workbench 12 by locking the catch 13 and the locking fitting 14.

An eye plate 25 is attached to the upper surface at approximately the center of the length of the second walkway 3, and a pair of pulleys 3
7A and 37B are attached to the eye plate 25. In FIG. 2, when looking from the truck 4 toward the workbench 12, the left steel cable 23A is hung double over the pulley 37A and the pulley 24A on the outrigger 15, and then guided to the winch 27A on the deck. Similarly, the right steel cable 23B is connected to the pulley 37B.
After being hung from the pulley 24B on the outrigger 15, it is guided to the winch 27B on the deck. Therefore, steel cables 23A and 23B on both port and starboard sides
When rolling up the same amount at the same time, the right end of the second walkway 3 can be lifted by rotating the second walkway 3 around the horizontal pin. Also, steel cables 23A on both port and starboard sides,
23B, the second walkway 3 can be rotated around the vertical pin 21 to swing the right end of the second walkway 3 in a horizontal plane.

As shown in FIG. 4, a pedestal 19 is attached to the traffic vessel 11 to support the second walkway 3 placed in the retracted position. A roller 36 is attached to the pedestal 19 and rolls the second walkway 3.

As shown in FIG. 2, an onboard walkway 28 having an intermediate joint 29 is connected at one end to a turntable 31 on the trolley 4 and at the other end to a turntable 32 attached to a lifting platform 30 on the deck 6. There is.
The onboard walkway 28 is provided with a strut 38 below the intermediate joint 29 (FIG. 3). Although not shown, the support column 38 is provided with a roller at its lower end, supports the weight of the shipboard walkway 28 at the intermediate joint portion, and rolls on the deck 6.

In use, when the apparatus 10 of the present invention is placed in the storage position shown in FIG.
17B to reach the state shown in FIG. Next, when the pair of winches 27A and 27B are activated to lift the second walkway 3 by the steel cables 23A and 23B, the state shown in FIG. 6 is reached. In this state, the right end of the second walkway 3 is raised to a higher level than the pedestal 9 on the workbench 12. There, transport ship 11 was placed on workbench 1.
2, the right end of the second walkway 3 is placed directly above the catch seat 13, as shown in FIG. Next, when the steel cables 23A and 23B are loosened and the right end of the second walkway 3 is lowered to lock the locking fitting 14 to the catch seat 13, it can be placed in the use position shown in FIG. When storing, just do the opposite of the above.

As described above, since the device of the present invention is equipped with a post 1 that can be raised and lowered, the post 1 can be kept in a low position when not in use, reducing excessive stress caused by wind pressure.
It can reduce resistance during navigation and improve the stability of traffic ships. Since the outer end of the second walkway 3 can be swung vertically and horizontally by a universal joint consisting of a horizontal pin 20 and a vertical pin 21, it can be quickly and easily locked to the cradle 9 on the workbench 12. There are advantages to doing so. It is another advantage of the invention that all the walkways 2, 3, 28 are made using tubular members which allow passage of personnel completely shielded from waves, allowing use in stormy weather.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the position in which the device of the present invention is used, FIG. 2 is a plan view of the device of FIG. 1, FIG. 3 is an end view of the device of FIG. 1, and FIG. 4 is a side view of the device of the present invention. FIG. 5 is a side view showing the first stage of operation from the storage position to the use position; FIG. 6 is a side view showing the device of the present invention in the mooring preparation position; FIG. 7 is a side view showing the state immediately before mooring. 1... T-shaped post, 2... First walkway, 3...
2nd walkway, 4... Trolley, 5... Track, 6... Deck, 7... Bracket, 8... Horizontal pin, 9...
...cradle on workbench, 10 ... device of the present invention, 11
... Transportation ship, 12 ... Offshore work platform, 13 ... Seat, 14 ... Locking metal fittings, 15 ... Outrigger,
16A, 16B... Steel cable for raising the post, 17...
Winch for raising and lowering posts, 18... Prop, 19...
Frame, 20...Horizontal pin, 21...Vertical pin, 2
2...Horizontal pin, 23A, 23B...Steel cable, 24
A, 24B... Pulley, 25... Eye plate, 2
6A, 26B... Pulley, 27A, 27B... Winch, 28... Ship walkway, 29... Intermediate joint, 3
0... Lifting platform, 31... Turntable, 32...
... Turntable, 33A, 33B... Pulley, 3
4... Bellows, 35... Long hole, 36... Roller, 37A, 37B... Pulley, 38... Support.

Claims (1)

[Scope of Claims] 1. A T-shaped post having a horizontal outrigger at the upper end and rotatably attached at the lower end to a portion adjacent to one end of the deck and tilting up and down in a vertical plane, and a T-shaped post installed on the deck in the vertical plane. A first walkway having one end rotatably attached to a trolley running along the track and the opposite end crossing the post in an X-shape, one end being rotated to the opposite end of the first walkway by a horizontal pin. a second walkway which is freely continuous and has a joint having a vertical pin at a portion adjacent to one end thereof and whose opposite end extends outboard; A walkway consisting of a pair of control lines secured to the section and guided to winches mounted on the deck on either side of the track via pulleys attached to each end of an outrigger on the post. 2. A patent claim characterized in that one end is rotatably connected to a truck, the opposite end is rotatably connected to a platform on the deck, and the intermediate portion is provided with a walkway on board that has a joint part that can be bent freely in a horizontal plane. Walkways listed in Range 1 of