JPS61229009A - Off-shore working platform - Google Patents

Abstract

PURPOSE:To improve working efficiency, by a method wherein a working platform body, formed in a U-shape in a plane, and a coupling body, serving to intercouple ends across the opening of the working platform body, are so constituted as to form a buoyant body. CONSTITUTION:After a working platform body is tugged to a site in a state to intercouple ends across the opening part of a working platform body 1 by means of a coupling body 2 and a working platform A is positioned, legs 3 of the body 1 are lowered. After working platforms 1 and 2 are jacked up with the aid of an elevating device 4 and the legs 3, piles are driven within a working space S. After a work on the working platform A is completed, the working platforms 1 and 2 are jacked down with the aid of the elevating device 4 and the legs 3 to seat the platform on water surface and pull off the legs 3. Further, through removal of pins 12, the coupling body 2 is pulled off from the body 1 for removal, and after the working plat form A is moved in a manner to prevent contact of the body 1 with the piles built within the working space S, the body 1 is coupled with the coupling body 2 again.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a marine work platform used for driving piles into the sea, etc. [Prior Art] Such a work platform is towed to a work site by a tugboat and placed at a predetermined position. Then, the legs provided at the four corners of the workbench are lowered to the seabed using a lifting device to fix the workbench, and the workbench is fixedly installed by using the legs to jack up the workbench to above the water line using the lifting device.

The piles are then driven into the sea using a hammer leader placed in the center of the work platform (if the hammer leader is installed at the side edge of the work platform, the balance will be poor and work efficiency will be reduced). The head of the pile driven into the sea protrudes into the space at the center of the workbench, causing interference between the workbench and the pile when the workbench is moved to land in the water after driving the pile.

In order to avoid this interference, the conventional methods were to (a) lift the workbench using a large crane, (b) make the workbench have a cross-shaped planar shape with one corner open, or (c) use piles to An overbridge type with a height that would not interfere was used (see Japanese Patent Laid-Open No. 1005/1983).

[Problems to be solved by the invention] However, in the case of (a), the workability is poor due to extensive setup, and in the case of (g), the rigidity of the workbench is reduced, and furthermore, in the case of (c) In this case, it will be a large workbench.

The present invention has been made in order to solve the above-mentioned drawbacks of conventional marine work platforms having a work space in the center. To provide a marine working platform which can be used as a platform and has good workability without requiring long steps.

[Means for Solving the Problems] Therefore, according to the present invention, in a marine work platform having a work space in the center, the marine work platform has a function as a floating body, and the four corners are It consists of a workbench main body in the shape of a flat face, which is equipped with legs and an elevating device, and a removable connecting body that also functions as a buoyant body and connects the opening of the workbench main body. Furthermore, when implementing the present invention,
A meshing groove is formed in the opening of the workbench, and a meshing protrusion that meshes with the meshing groove is formed in the coupling body, and the meshing protrusion of the coupling body is slid into the meshing groove of the opening of the workbench main body. By interlocking, the openings of the workbench body are connected by the connecting body.

Furthermore, when carrying out the present invention, the coupling body is provided with a spacing adjustment machine for adjusting the spacing between the openings of the workbench body, and the engagement protrusion of the coupling body is engaged with the engagement groove of the opening of the workbench body. When the openings of the workbench bodies are connected by the connecting body, the spacing between the openings of the workbench bodies is adjusted to the width of the connecting body using the spacing adjustment machine.

[Operations and Effects of the Invention] By configuring the workbench as described above with the workbench body having a planar shape and the removable connecting body that connects the opening of the workbench body, the workbench can be easily operated during towing and work. The workbench can be given the required strength by connecting the openings of the workbench body in the shape of a planar opening with a connecting body. In addition, when completing work such as piling driving and landing the workbench in the water and moving it, it is possible to remove the joint that connects the opening of the workbench and remove the piles that protrude from the workspace of the workbench. Structures such as these do not get in the way, and the combined body can be easily removed by simply pulling out the combined body with a winch, tugboat, etc. using its buoyancy, and work efficiency can be improved. When connecting the opening of the workbench body with a connecting body for towing and work,
As with the case of removing the combined body, this can be easily done using a winch, tugboat, etc.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3, the marine workbench is generally indicated by A. The marine workbench is equipped with a workbench main body 1 having one open corner and a mouth-shaped planar shape.

Legs 3 and a lifting device 4 are provided at each of the four corners of the workbench body 1. The legs 3 are used to fix the workbench A, and the lifting device 4 is used to jack up or down a combined body 2, which will be described later, which connects the workbench main body 1 and its opening using the legs 3. It is something.

The marine workbench A also includes a removable connector 2 that connects the opening of the workbench main body 1 in the shape of a planar opening. Engagement protrusions 6 that engage with engagement grooves 5 formed in the opening of the workbench body 1 are formed on both side surfaces of the combined body 2. Further, a drawing guide 7 is provided at the tip of the engaging protrusion 6. In the illustrated embodiment, two meshing grooves 5 and two meshing protrusions 6 are provided. Further, at the tip of the coupling body 2, there is provided a spacing adjuster, generally indicated by 8, which engages with the engagement groove 5 formed in the opening of the workbench main body 1 to adjust the spacing between the openings of the workbench main body 1. It is being The distance adjuster 8 consists of a jack 9 and a slider 10 operated by the jack 9. The tip of the slider 10 has an enlarged part 10a as shown in FIG. It is adapted to engage with an enlarged portion 5a of an engaging groove 5 formed in the opening of the workbench main body 1 shown in FIG. 4(b). Therefore, by engaging the enlarged portion 10a of the slider 10 with the enlarged portion 5a of the engaging groove 5 and moving the slider 10 forward or backward using the jack 9, the interval between the openings of the workbench body 1 is adjusted to the width of the joint body 2. can do.

The workbench main body 1 is provided with two retractable winches 11, and the wires 12 of the retractable winches 11 are connected to the front surface of the combination body 2 to pull the combination body 2 into the opening of the workbench main body 1. It is designed to be filled in.

Figures 2 and 3 show a state in which the opening of the workbench main body 1 is connected with the connecting body 2. After the connection is completed, the bottle 13 is inserted between the workbench main body 1 and the connecting body 2. .

A space S formed by the mouth-shaped workbench main body 1 and the combined body 2 forms a working space, and a stake or the like is driven into this space. Both the workbench main body 1 and the combined body 2 have a function as a buoyant body.

FIG. 5 shows another embodiment of the present invention, in which the wire 12 of the winch 11 is wrapped around a sheave 14 provided on the combined body 2, and the combined body 2 is pulled by rotating the winch 11 forward or backward. It can be loaded and pulled out. The other configurations are the same as those of the previous embodiment.

Next, the manner in which the marine workbench is used will be explained step by step.

(a) The marine workbench shown as A as a whole is towed with the opening of the workbench main body 1 connected by the connecting body 2.

(b) Position on the workbench.

(c) Lower the legs 3 provided on the workbench main body 1.

(d) The workbench 1.2 is jacked up using the lifting device 4 and legs 3 provided on the workbench main body 1.

The workbench 1.2 assumes a position above the waterline, and with it the workbench is fixed.

(E) Drive a pile into the work space S in the center of the workbench 1.2 using, for example, a hammer reader (not shown).

done.

(f) Jack down the work platform 1.2 using the lifting devices 4 and 1II3. Workbench 1.2 landed on water.

(G) Using the buoyancy of the workbench 1.2, cut the legs 3,
That is, the legs 3 are pulled out (the adhesion force is broken).

(H) Place leg 3 on the bottom.

(S) In order to reduce the load on the connection part with the combined body 2 to be removed, the level of the workbench body 1 is adjusted by the lifting device 4 until the combined body 2 is close to the empty state.

(J) Remove the bin 12 connecting the workbench main body 1 and the combined body 2, and use a winch, jack, tug, etc. to handle and remove the combined body 2 from the workbench main body 1.

(l) While being careful not to let the workbench main body 1 come into contact with the structures such as piles constructed in the workspace S, move the workbench A by a tugboat until the structures such as the piles come out of the opening.

(E) Pull the combined body 2 together using a winch, tugboat, etc.

Then, set the spacing adjuster 8 provided on the combination body 2 in the opening of the workbench main body 1, and operate the jack 9 to move the slider 1.
0 is moved back and forth to adjust the distance between the openings of the workbench body 1 and the joint body 2.
Adjust to the width of Next, using the slider 10 of the spacing adjuster 8 as a guide, the combined body 2 is pulled into the opening of the workbench body 1 using a winch or jack, so that the engaging groove 5 of the workbench body 1 and the engaging protrusion 6 of the combined body 2 are aligned. mesh together. The combination body 2 can be pulled into position using a sweep winch or jack. Then, the fixed bottle 13 is inserted into the meshing part. As a result, the opening of the workbench main body 1 is connected by the connecting body 2.

(iii) Tow work platform A to the next work location using a tugboat.

[Brief explanation of drawings]

The drawings show a marine working platform according to an embodiment of the present invention; FIG. 1 is a perspective view thereof, FIG. 2 is a plan view, FIG. 3 is a front view seen from the combined body side, and FIGS. ) is a detailed cross-sectional view of the engaging groove provided on the workbench body and the engaging protrusion provided on the coupling body, and FIG. 5 is a plan view of a marine workbench in which the retraction and drawer winches of the coupling body are changed. 1... Workbench main body 2... Connecting body 3... Legs 4... Lifting device 5... Engagement groove 6...
Meshing protrusion 7... Call-in guide 8... Spacing adjuster 9... Jacket 10... Slider 11
...Winch 12...Wire 13...Bin
14...Sheave Figure 2-

Claims (3)

[Claims] (1) A marine workbench having a work space in the center, which has one open corner and a U-shaped planar shape, and is equipped with legs and lifting devices at the four corners. It consists of a workbench main body and a removable connecting body that connects the opening of the workbench main body, and both the workbench main body and the connecting body have a function as a buoyant body. Marine workbench. (2) A meshing groove is formed in the opening of the workbench body, and a meshing protrusion that meshes with the meshing groove is formed on the joint body, and the meshing protrusion of the joint body is slid into the meshing groove of the workbench body. 2. The marine workbench according to claim 1, wherein the openings of the workbench body are connected by a connecting body by interlocking with each other. (3) The combined body is provided with a spacing adjuster that engages with a meshing groove formed in the opening of the workbench main body to adjust the spacing between the openings of the workbench main body. A marine work platform as described in Scope 2.