JPS5925958Y2 - Support leg guide device for elevating offshore work platforms - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a supporting leg guide device for an offshore work platform that has a platform that can be raised and lowered by being submerged in supporting legs that are erected on the seabed.

FIG. 1 shows a plan view of a general offshore work platform, and the outline will be explained below.

There are three cords 2 at each corner of platform 1.
The platform 1 is erected on the seabed by a rack 5 fixed to the cord 2 and a pinion 6 installed on the platform 1. The leg 4 can be raised and lowered.

When this elevating offshore work platform is towed to a destination, the leg 4 is raised from the seabed and towed.

Therefore, in order to prevent the raised leg 4 from shaking due to wind and waves during towing, a support leg guide device shown in FIG. 2 is used.

FIG. 2 shows a side view of a conventional support leg guide device.

A leg guide 8 is fixed around the opening of the support leg insertion hole 7 formed in the platform 1, and a wedge 9 or shim is inserted from above to fill the gap between the cord 2 of the leg 4 and the leg guide 8. .

However, this leg guide 8 has a drawback in that the wedge 9 is tightly caught between the cord 2 and the leg guide 8 during towing, and it is very difficult to remove the wedge 9 after towing.

The present invention aims to eliminate the above-mentioned drawbacks by simple means.

An example of the implementation of the present invention will be described below based on FIGS. 3 to 6.

Around the opening of the leg insertion hole 7 formed in the platform 1, there is a flange which can be slid in the direction toward the axis of the cord 2 of the leg 4, and whose lower surface is a sliding surface 10 as shown in the cross-sectional view of FIG. 5, for example. Support leg guide 12 with section 11
The support leg guide 12 is provided with a holding member 13 at one end thereof, which can come into contact with the cord 2, as shown in FIG.

Reference numeral 14 denotes a wedge guide for fixing the support leg guide 12, which is fixedly installed on the platform 1 on both sides of the support leg guide 12, and has a fitting part 15 so that the flange part 11 of the support leg guide 12 can slide. In addition, a widening wedge space 16 is provided on the cord 2 side so that the wedge 9 can be clamped between the support leg guide 14 and the support leg guide 14 can be fixed, and the wedge 9 has a wedge shape that fits this. It is composed of

With this configuration, the external force applied to the cord 2 is applied to the wedge guide 14 via the wedge 9.

Next, its operation will be explained.

First, when towing the elevating offshore work platform, the leg 4 of the platform 1 is raised by the rack 5 and pinion 6.

The support leg guide 12 is slid toward the axis of the cord 2 by means of a jack (not shown), and the holding member 13 at the tip is brought into contact with each cord 2 of the raised leg 4.

Next, the wedge 9 is inserted into the wedge space 16 between the support leg guide 12 and the wedge guide 14, and the support leg guide 12 is fixed.

With the above operations, the guide for code 2 of leg 4 is completed, so the elevating offshore work platform is towed to the destination.

At this time, since the wedge 9 is not inserted from above with its wedge-shaped tip facing down as shown in FIG. 2, it will not slip downward and become firmly wedged during towing.

After towing, the wedge 9 in the wedge space 16 is removed, as shown in FIG.
If you use a piece that is large enough to protrude from the support leg guide 12 when it is inserted, and provide a notch 17 on the underside of this protruding part, you can easily pry it upward when removing it. It's convenient.

The operation is completed by removing the wedge 9 and sliding the support leg guide 12 backward.

According to the support leg guide device for an elevating offshore work platform of the present invention, the wedge inserted into the wedge space between the support leg guide and the wedge guide can be easily removed, thereby improving work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a general elevating type offshore work platform, Fig. 2 is a longitudinal cross-sectional side view of a conventional support leg guide device, and Figs. 3 to 6 are an implementation of the support leg guide device according to the present invention. An example is shown in which FIG. 3 is a schematic longitudinal side view of the support leg guide device, FIG. 4 is a plan view thereof, FIG. 5 is a sectional view taken along line A-A in FIG. 3, and FIG. FIG. 1... Platform, 2... Cord, 7... Opening, 9... Wedge, 1
2... Support leg guide, 13... Holding member, 14... Wedge guide, 16...
・Wedge space.

Claims (1)

[Scope of utility model registration request] A support leg guide device for an offshore work platform having a platform that can be raised and lowered along support legs installed on the seabed,
A support leg guide having a holding member capable of coming into contact with the support leg at one end is provided around the opening of the support leg insertion hole formed in the platform so as to be slidable in a direction toward the support leg axis, and the support leg Wedge guides for fixing the support leg guide by sandwiching the wedge between the support leg guide and the support leg guide are fixed on the platform on both sides of the guide, so that the wedge space created by the wedge guide becomes wider on the support leg side. A support leg guide device for an elevating offshore work platform, characterized in that it is configured as follows.