JPH0333851B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a marine work platform used for driving piles into the sea.

[Prior Art] During installation work, such a workbench is towed to the work site by a tugboat, and at a predetermined position, the legs provided at the four corners of the workbench are lowered to the seabed using a lifting device, the workbench is fixed, and the legs are used to lower the workbench to the seabed. Then, use the lifting device to jack up the workbench to above the water line and securely install the workbench. The piles are then driven into the sea using a hammer leader located in the center of the workbench (if the hammerleader is placed on the side edge of the workbench, 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 a U-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).

However, in the case of (a), the work efficiency is poor due to extensive setup, in the case of (b), the rigidity of the workbench is reduced, and in the case of (c), the workbench is large.

As another prior art, Japanese Patent Application Laid-Open No. 50-4780 discloses a marine workbench having a U-shaped planar shape and consisting of a workbench main body and a removable connector that connects the workbench's opening. Japanese Utility Model Publication No. 48-29363 discloses a connecting portion that employs a sliding method. However, these techniques do not provide a means for adjusting the spacing between the openings in the workbench body to match the length of the coupling body, nor do they provide a means for drawing the coupling body into the opening. do not have. Therefore, the work of joining the assembly to the workbench body is difficult and inaccurate, resulting in poor work efficiency.

[Problems to be Solved] The present invention has been made to solve the above-mentioned drawbacks of the prior art, and it is possible to reduce the size of the workbench without reducing the rigidity of the workbench. The purpose of the present invention is to provide a marine workbench that does not require large setups for the work of joining together bodies and has good workability.

[Means for Solving the Problems] According to the present invention, in a marine workbench having a work space in the center, the marine workbench has one open corner and a U-shaped planar shape. It consists of a workbench body equipped with legs and a lifting device at the four corners, and a removable connecting body that connects the opening of the workbench body, and both the workbench body and the connecting body function as a buoyant body. A meshing groove is formed on the surface facing the opening of the workbench main body, a meshing protrusion is provided on one of the surface openings of the combined body facing the meshing groove, and a meshing protrusion is provided at the tip of the meshing protrusion. is equipped with a pull-in guide, the other side is equipped with a jack that slides the slider horizontally toward the engagement groove, and the workbench body is equipped with two retraction winches on the left and right that pull the combined body. .

[Function] According to the present invention having the above-described configuration, the workbench includes a workbench main body having a U-shape in plan, and a connecting body that detachably connects the opening of the workbench main body. Therefore, during towing and work, the opening of the U-shaped workbench body can be connected with a connecting body to provide the workbench with the necessary strength. In addition, when the workbench that has completed work such as piling driving is landed in water and moved, it is necessary to remove the connecting body that connects the opening of the workbench body so that the workbench protrudes from the work space of the workbench. Structures such as piles do not get in the way. The combined body can be easily removed by simply pulling out the combined body using a winch, a tugboat, etc. using its buoyancy, and work efficiency can be improved.

In addition, in the present invention, when connecting the opening of the workbench main body with the connecting body, the
The connecting body is pulled into the opening by the pull-in winch at the base, and the length of the connecting body is adjusted by adjusting the distance between the openings using a spacing adjustment machine consisting of a jack and a slider, and the slider is inserted into the enlarged part of another engagement groove. The enlarged portion may be allowed to engage and the winch may further retract the combination into position. Thereby, the work of connecting the opening of the workbench body with the connecting body can be easily and accurately performed.

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

In FIGS. 1 to 3, the marine workbench shown as a whole by A includes a workbench main body 1 having one open corner and a U-shaped flat closed 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 the workbench main body 1 and a joint 2, which will be described later, that connects the opening of the workbench using the legs 3. It is something.

In addition, the marine workbench A has a U-shaped workbench main body 1.
It is provided with a removable connector 2 that connects the openings of the connector. Engagement protrusions 6 are formed on both surfaces of the combined body 2 to engage engagement grooves 5 formed on opposing surfaces of the opening of the workbench body 1. A drawing guide 7 is provided at the tip of one of the engaging protrusions 6. Furthermore, the other engaging protrusion is the slider 10
The slider can be moved horizontally by a jack 9. This jack 9 and slider 10 constitute a distance adjusting machine.

In the illustrated example, another engagement protrusion 6a is further provided below the engagement protrusion 6, and the slider 10
Another engaging protrusion 6b is provided below.
The openings are also provided with engagement grooves (one of which is indicated by reference numeral 5' in FIG. 1) at corresponding positions. However, these engaging protrusions and engaging grooves do not necessarily need to be provided. The tip of the slider 10 has an enlarged part 10 as shown in FIG.
a, and this enlarged portion 10a is a meshing groove 5 formed in the opening of the workbench main body 1 shown in FIG. 4B.
It is preferable to configure it so that it engages with the enlarged portion 5a of. Therefore, by engaging the enlarged part 10a of the slider 10 with the enlarged part 5a of the engaging groove 5 and moving the slider 10 forward or backward by the jack 9, the joint body 2 is placed between the openings of the workbench main body 1.
The width can be adjusted. However, these enlarged portions do not necessarily need to be provided.

The workbench main body 1 is provided with two retractable winches 11, and the wires 12 of the retractable winches 11
is connected to the front surface of the combination body 2 so that the combination body 2 can be retracted into the opening of the workbench body 1.

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

A square space formed by the U-shaped workbench main body 1 and the combined body 2 is a workspace S, and a stake or the like is driven into this space. And the workbench main body 1 and the combination body 2
Both have the function of a buoyant body.

The distance between the openings of the U-shaped workbench body 1 may change due to waves or other external forces. At this time, the protruding length of the slider 10 can be controlled by the jack 9 to suitably engage the engagement groove 5.

FIG. 5 shows another embodiment of the invention, in which the wire 12 of the winch 11 is connected to a sheave 14 provided in the combination 2.
By rotating the winch 11 in the forward and reverse directions, the combined body 2 can be retracted 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 with reference to all the steps.

(a) As previously mentioned, the marine workbench, generally indicated by A, is towed with the opening of the workbench main body 1 connected by the connecting body 2.

(b) Position workbench A.

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

(d) The workbenches 1 and 2 are jacked up using the lifting device 4 and legs 3 provided on the workbench main body 1. The work platforms 1 and 2 take positions on the water line, and the work platforms are fixed therewith.

(E) Drive a pile into the work space S in the center of the workbenches 1 and 2 using, for example, a hammer reader (not shown). done.

(F) Jack down the work platforms 1 and 2 using the lifting device 4 and legs 3. Workbench 1 and 2 landed in water.

(G) Using the buoyancy of the work platforms 1 and 2, the legs 3 are grounded, that is, the legs 3 are pulled out (to break the adhesive force).

(H) Place leg 3 on the bottom.

(li) 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 its empty state.

(v) Remove the pin 13 connecting the workbench main body 1 and the combined body 2, and pull out the combined body 2 from the workbench main body 1 using a winch, jack, tug, etc. and remove it.

(l) While being careful not to contact the workbench body 1 with the structures such as piles constructed in the work space 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 two pull winches. Then, the slider 10 provided on the combined body 2 is moved forward or backward by operating the jack 9 to adjust the width of the combined body 2 to the interval between the openings of the workbench body 1. Next, using the slider 10 as a guide, the combined body 2 is retracted into the opening of the workbench body 1 by a winch, so that the engaging groove 5 of the workbench body 1, the engaging protrusion 6 of the combined body 2, and the slider are engaged.
Furthermore, the combined body 2 can be retracted to a predetermined position using a winch. Then, the fixing pin 13 is inserted into the meshing portion. As a result, the opening of the workbench main body 1 is connected by the connecting body 2.

(iii) Work platform A will be towed to the next work area by a tugboat.

[Effects of the Invention] As described above, according to the present invention, since the coupling body is made detachable from the main body of the workbench, it is possible to move the workbench even if the head of a pile etc. driven into the workspace protrudes. The combined body can be easily removed, and the workbench can be made smaller without reducing its rigidity.

In addition, even if the gap between the openings changes due to external forces such as waves, the slider can ensure engagement with the meshing groove, and the connecting body can be connected to the workbench body simply by operating the retracting winch. is also easy.

Therefore, work efficiency can be improved.

[Brief explanation of drawings]

The drawings show a marine working platform according to an embodiment of the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a plan view, and FIG.
The figure is a front view seen from the combined body side, Figures 4A and 4B are detailed sectional views of the engaging groove provided on the workbench body and the engaging protrusion provided on the combined body, and Figure 5 shows the retraction of the combined body and the drawer winch. FIG. 3 is a plan view of the marine workbench used. 1... Workbench main body, 2... Combined body, 3... Legs,
4... Lifting device, 5... Engaging groove, 6... Engaging protrusion, 7... Drawing guide, 8... Spacing adjuster, 9...
... Jacket, 10 ... Slider, 11 ... Winch, 12 ... Wire, 13 ... Pin, 14 ... Sheave.

Claims (1)

[Claims] 1. A marine work platform with 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 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 the function of a buoyant body and engage with the surface facing the opening of the workbench main body. A groove is formed, and an engaging protrusion is provided on one side of the face facing the engaging groove of the combined body, a drawing guide is provided at the tip of the engaging protrusion, and an engaging groove is provided on the other surface. A marine workbench characterized by having a jack for sliding a slider horizontally toward the workbench, and having two retraction winches on the left and right for pulling a combined body on the workbench body.