JP2017007845A - Hanging tool for underwater work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hanging tool for underwater work which enables slinging work and unslinging work to be conducted safely in water.SOLUTION: A hanging tool for underwater work is connected to a support wire hanging from a ship and includes: a first slinging wire connected to the support wire; a floating body disposed in the first slinging wire and having a buoyant force; and a second slinging wire disposed below the floating body and having connection means which detachably hangs a heavy object.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an underwater work hanger.

  Conventionally, underwater water work has been performed by divers in order to smoothly install structures in the water and create the bottom of the water. The underwater work by divers is particularly important in the cover work which is a kind of water bottom leveling. For example, as shown in FIG. 7, the water bottom leveling is a process in which rubble 16 is piled up on the water bottom ground to form a foundation mound, and a concrete block 17 (heavy object) such as a consolidation block or a covering block is laid on the upper surface. Have

  As shown in FIG. 7, a lifting tool 15 having a concrete block 17 attached to a tip of a crane wire 13 suspended underwater from a winch 12 of a crane 11 mounted on a work boat 10 is attached via a crane hook 14. It has been. As the crane wire 13 is moved up and down by the winch 12, the concrete block 17 is settled to a predetermined water bottom.

  After reaching the bottom, the diver S performs a ball removing operation for removing the hanger 15 from the concrete block 17. Further, when the concrete block 17 once placed on the bottom of the water is moved for leveling the bottom of the water, a slinging operation for connecting the hanger 15 and the concrete block 17 is performed.

  In the above-described ball removing operation and slinging operation, when the work boat 10 is swung up and down and left and right by the waves, the vibration of the work boat 10 is transmitted to the wire of the hanger 15 and is connected to the hanger or the concrete block. There is a risk of the diver's fingers being caught in the water.

  An object of the present invention is to provide a suspension tool for underwater work that allows a slinging work and a ball removal work in underwater work to be performed safely.

The above issues
An underwater work suspension connected to a support wire suspended from the ship,
A first sling wire coupled to the support wire;
A floating body having buoyancy arranged on the first sling wire;
A second slinging wire having a connecting means for detachably hanging a heavy load, which is disposed at a position below the floating body;
The problem is solved by an underwater working suspension.

  ADVANTAGE OF THE INVENTION According to this invention, the suspension tool for underwater work which makes it possible to perform safely the slinging work and the ball removal work in underwater work can be provided.

It is a figure which shows the structure of the hanging tool which concerns on 1st Embodiment. AC is explanatory drawing which shows an example of the installation operation | work of the heavy article using the hanging tool of FIG. A and B are the figures which show the modifications 1 and 2 of the hanging tool which concerns on 1st Embodiment. It is a figure which shows the structure of the hanging tool which concerns on 2nd Embodiment. AC is explanatory drawing which shows an example of the installation operation | work of the heavy article using the hanging tool of FIG. A and B are the figures which show the modifications 1 and 2 of the hanging tool which concerns on 2nd Embodiment. It is a figure explaining the conventional hanging tool.

  Hereinafter, an embodiment of the underwater work hanger according to the present invention will be described. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant description thereof will be simplified or omitted as appropriate. The drawings are not intended to show the relative ratio between members or parts. Accordingly, specific dimensions can be determined by one skilled in the art in light of the following non-limiting embodiments. Moreover, the connection structure demonstrated below is an example, and the general connection method currently implemented normally can be applied suitably.

[First Embodiment]
FIG. 1 is a diagram illustrating a configuration of a hanging tool 1 according to the first embodiment.

  As described with reference to FIG. 7, the lifting tool 1 of the present embodiment has a crane hook 14 at the tip of a crane wire 13 (corresponding to a support wire) suspended from a winch 12 of a crane 11 mounted on a work boat 10. It is attached via.

The structure above the lifting tool 1 is generally used when a heavy object is suspended from the ship so as to be lifted and fixed on the bottom of the water. Therefore, in the following description, the description of the configuration above the hanging tool 1 is omitted.
The hanging tool 1 of this embodiment shown in FIG. 1 is a so-called single-hanging type. The hanger 1 includes a first sling wire 2, a floating body 3 having buoyancy, a weight body 5 that suppresses the buoyancy of the floating body 3, and a connecting means 8 that detachably attaches a heavy object 9 to the tip. 2 sling wires 7.

  The first sling wire 2 is formed so that the upper end portion can be connected to the crane hook 14, and the lower end portion is formed with a ring-shaped eye portion 2 a that can be connected to another member. A floating body 3 is disposed at a position below the first sling wire 2 (in the direction of arrow Y2).

  The floating body 3 in the illustrated example is a float material that obtains buoyancy by filling a gas therein. The floating body 3 of the present embodiment has a through hole 3a in the central shaft portion. By having the through hole 3a, the first sling wire 2 can be passed. Then, the floating body 3 can arbitrarily determine the installation position within the range of the first slinging wire 2.

  When the installation position of the floating body 3 is determined, a fixing tool such as a wire clip 2b is attached to the upper position and the lower position of the floating body 3 in the first sling wire 2 to fix the position of the floating body 3.

  The floating body 3 of the present embodiment has means for adjusting the buoyancy although it is not shown in detail. The means for adjusting the buoyancy is, for example, injecting an appropriate amount of a diver's breath from the inlet provided in the floating body 3 or adjusting the buoyancy by extracting the gas from the inlet by applying external force to the floating body 3 There is a way. Moreover, as a method for injecting gas, a method of injecting gas from the air hose by attaching an injection hose to the floating body 3 and connecting a diver's air hose and the injection hose may be carried out.

  The weight body 5 has a weight larger than the weight of the hanger 1 and the buoyancy of the floating body 3. The weight body 5 may be, for example, a concrete block or a metal lump. The weight body 5 is preferably a rectangular parallelepiped. As will be described later, when the heavy object 9 is attached to the bottom of the water by the hanger 1, the weight body 5 is also placed on the bottom of the water or the heavy object 9. At this time, if the weight body 5 is a rectangular parallelepiped, it can be stably placed on the placement surface. Ring-shaped suspension ring portions 5 a and 5 b are formed on the upper and lower portions of the weight body 5.

  The weight body 5 having the above-described configuration is disposed at a position below the floating body 3. Specifically, the weight body 5 can be attached to a position below the floating body 3 by connecting the eye portion 2 a of the first sling wire 2 and the suspension ring portion 5 a on the upper portion of the weight body 5 with the shackle 4.

  A second sling wire 7 is connected to a lower position (lower end) of the weight body 5 having the above-described configuration. Specifically, by connecting the suspension ring portion 5b below the weight body 5 and the eye portion 7a provided at the upper end of the second sling wire 7 with a shackle 6, a second sling is placed below the weight body 5. The wire 7 can be arranged. The second sling wire 7 preferably has a length equal to or greater than the diameter of the heavy object 9.

  Incidentally, the 1st sling wire 2 and the 2nd sling wire 7 are attached so that the axis line J (medium axis line) may correspond. The first staking wire 2 in the illustrated example is one, and the second staking wire 7 is also one. By attaching both the wires 2 and 7 through the weight body 5 so that the axis line J coincides, each part of the hoist 1 is arranged on one axis line J (on the same line) from the wire crane 13. This can contribute to suspending a heavy object 9 to be described later without blurring.

  The second slinging wire 7 has a shackle 8 (corresponding to a connecting means) for smoothing the slinging and deballing operations at the lower end. The shackle 8 is connected to an eye portion 7 b formed at the lower end portion of the second sling wire 7.

  The second sling wire 7 is connected to a hanging ring portion 9 a provided on the heavy object 9 via a shackle 8. Moreover, you may implement by the structure which connects a hook material to the shackle 8, and connects a hook material and the suspension ring part 9a. In this embodiment, the heavy object is a covering block laid on the rubble for leveling (hereinafter referred to as a covering block 9). Of course, it may be rubble.

  The hanging ring portion 9a of the covering block 9 is provided at the center of gravity (substantially central position) on the upper surface. Therefore, since the hanger 1 can suspend the covering block 9 at the center of gravity, it can contribute to stable suspending or lifting work.

  As described above, the hanging tool 1 of the present embodiment has a configuration in which the weight body 5 and the second sling wire 7 are disposed at a position below the floating body 3. With the above-described configuration, even when the work block 10 swings up and down and left and right due to waves at the time of staking and removing the covering block 9 that is attached to the bottom of the water, the danger of the fingers of the diver being caught is prevented. it can. Hereinafter, this point will be described based on the work procedure of FIG.

  FIGS. 2A to 2C are explanatory diagrams illustrating an example of a procedure for installing the covering block 9 using the hanging tool 1 of FIG. FIG. 2 (A) shows the state of the hanger 1 when the covering block 9 is hung. FIG. 2 (B) shows the state of the hanger 1 when the covering block 9 reaches the bottom of the water. FIG. 2C shows the state of the hanger 1 after the covering block 9 is removed.

  In FIG. 2A, the covering block 9 is suspended by the hanger 1. At this time, as described above, each part of the hanger 1 and the covering block 9 are arranged on the single axis J from the first slinging wire 2, so that the covering block 9 can be stably suspended.

Then, as shown in FIG. 2B, when the covering block 9 reaches the bottom of the water, the weight body 5 subsequently reaches the top surface of the covering block 9. Of course, the weight body 5 may be grounded on the water bottom. At this time, the weight body 5 is made to bottom from the position of the hanging ring portion 9 a of the covering block 9.
The floating body 3 is restrained from being lifted upward by the weighted body 5 that is bottomed, and is in a state of floating at a certain height in water.

  After the weight 5 is settled, the crane wire 13 is further unwound so that the first sling wire 2 is formed with a deflection T1 indicated by a dotted line. This bending T1 can be formed by the floating body 3 floating at the above-mentioned fixed height position. The flexure T1 is formed with the upper wire clip 2b attached to the first sling wire 2 as a fulcrum.

  Since the bottomed weight body 5 is a rectangular parallelepiped, the mounting state is stable. Since the second sling wire 7 connected to the weight 5 has a length that is at least the diameter of the covering block 9 as described above, the second sling wire 7 is bent at the time of bottoming. Occurs. Since this bend T2 becomes a movable region when the diver removes the second sling wire 7 (shackle 8) from the covering block 9, the working efficiency is improved.

  Even when the work boat 10 swings up and down, left and right, the deflection T1 of the first sling wire 2 formed by the floating body 3 floating at a certain height position absorbs the above-described swinging, so that the floating body The portion below 3 is not affected by the oscillation. Therefore, when the diver removes the second sling wire 7 from the covering block 9, even if the work boat 10 swings up and down and left and right, the second sling wire 7 is not affected at all. There is no fear that the finger is caught between the hanging ring portion 9a and the peripheral members, so that safe work can be performed.

  When the above-described ball removal work is completed, the hoist 1 can be easily removed from the water by winding the crane wire 13 with the winch 12 as shown in FIG.

  In FIG. 2, the operation of placing the covering block 9 at a predetermined position on the bottom of the water and removing the hanging tool 1 has been described. However, the hanging tool 1 of the present embodiment is hung on the covered covering block 9. Thus, the work for resetting to an appropriate position can be performed only by reversing the above description. Therefore, even during the sling operation of the hanger 1, since it can be performed in the state shown in FIG. 2 (B), not only the work efficiency of the sling operation is good, but it is possible to work safely by preventing the fingers from being pinched. .

(Modification 1)
Next, Modification 1 of the first embodiment will be described with reference to FIG. 3A. In the first embodiment, the case where the floating body 3 has the through hole 3a has been described as an example. However, even when the floating body 3 does not have the through hole 3a, the same technical idea can be applied. Only the differences will be described below.

  As shown in FIG. 3A, the hanging tool 1 ′ of Modification 1 is a so-called single-hanging type like the hanging tool of the first embodiment.

The floating body 3 is the same in that it is disposed at a position below the first sling wire 2, but differs in that it is not mounted on the first sling wire 2.
The floating body 3 is provided with a ring-shaped eye portion 3 b at the lower end thereof, and is connected to the shackle 4 together with the eye portion 2 a of the first sling wire 2 and the hanging ring portion 5 a of the weight body 5. . Even in this case, the weight body 5 and the second sling wire 7 can be disposed at a lower position than the floating body 3, and the same effect as in FIG. 1 can be obtained.

(Modification 2)
Next, Modification 2 of the first embodiment will be described with reference to FIG. 3B.
The hanger 1 '' of the modification 2 is also based on the technical idea substantially the same as that of the first embodiment, and differences from the first embodiment will be described below.

  The hanger 1 '' of the modified example 2 is a so-called single hanger type similarly to the hanger of the first embodiment. However, the point which does not have the weight body 5 which suppresses the buoyancy of the floating body 3 is different. In the second modification, the weight of the second sling wire 7 ′ is made larger than the buoyancy of the floating body 3 in order to suppress the buoyancy of the floating body 3.

  As the means, it is conceivable to use a heavy second staking wire 7 '. Then, when the covering block 9 reaches the bottom, the heavy second slinging wire 7 ′ can reliably prevent the floating body 3 from rising and can form an appropriate deflection with the covering block 9. . Therefore, the same effect as described in the first embodiment can be obtained in the second modification.

[Second Embodiment]
Next, a hanging tool 100 according to a second embodiment of the present invention will be described with reference to FIGS. The second embodiment is based on the technical idea substantially the same as that of the first embodiment, and will be described below with a focus on differences from the first embodiment.
In short, the hanging device 100 according to the second embodiment is different from the hanging device 1 according to the first embodiment in that it is a multiple hanging type.

  The lifting device 100 basically includes a first sling wire 20 connected via a crane wire 13 and a crane hook 14, a floating body 30 having buoyancy, a weight body 50 for suppressing the buoyancy of the floating body 30, and a tip portion. And a second sling wire 70 having connecting means 80 (corresponding to the shackle 80) for detachably hanging the heavy object 90.

  About the 1st slinging wire 20 and the floating body 30, since it is the same as that of 1st Embodiment, description is abbreviate | omitted.

  A mounting configuration of the weight body 50 and the second sling wire 70 disposed below the floating body 30 will be specifically described. FIG. 4A is a diagram illustrating an example of the overall configuration of the hanging tool 100 according to the second embodiment. FIG. 4B is a partially enlarged view showing a connection configuration of the weight body 50 and the second sling wire 70. FIG. 4C is a partially enlarged view showing a connection configuration between the second sling wire 70 and the heavy object 90. In both FIG. 4B and FIG. 4C, one second sling wire 70 is shown for the sake of explanation.

A ring-shaped connecting annular member 41 that connects the weight body 50 and the second staking wire 70 is attached to the lower end (arrow Y2 side) of the first staking wire 20. Specifically, a ring-shaped eye portion 20 a formed at the tip of the first sling wire 20 and a connecting annular member 41 are connected to a shackle by 40.
A weight body 50 and four second sling wires 70 are connected to the connecting annular member 41. As shown in FIG. 4B, the weight body 50 is disposed at a position below the floating body 30 by connecting a suspension ring portion 50 a provided on the upper surface of the weight body 50 and a connection annular member 41 with a shackle 61. .

  In addition, the second sling wire 70 is connected to the lower position of the floating body 30 by connecting the ring-shaped eye part 70 a provided at the upper end of the second sling wire 70 and the connecting annular member 41 with the shackle 62. Be placed. In the present embodiment, the four second sling wires 70 are attached to the connecting annular member 41 in the same manner.

  The length L1 of the second sling wire 70 of the present embodiment is characterized by being longer than the hanging length L2 of the weight body 50. Although this will be described in detail later, this is to allow the second sling wire 70 to bend when the heavy object 90 settles on the bottom of the water and then the weight body 50 also bottoms. This bending allows the second slinging wire 70 to be smoothly removed or slung. Moreover, in the hanging tool 100 of this embodiment, the weight 50 may be configured to be connected to the connecting annular member 41 by a separate hanging wire. The height of the weight body 50 and the floating body 30 can be appropriately obtained by the suspension wire. This is because, since the space between the weight body 50 and the floating body 30 is actually a working space for a diver when the heavy object 90 reaches the bottom, it is important to take as much space as possible from the viewpoint of safety.

  Incidentally, the above-described “hanging length L2 of the weight body 50” refers to the height from the suspension ring portion 50a of the weight body 50 to the lower end of the weight body 50 in the illustrated example. In the case where the suspension wire is connected to the weight body 50, the “suspending length L <b> 2 of the weight body 50” refers to the height from the upper end of the suspension wire to the lower end of the weight body 50. In short, the length L1 of the second sling wire 70 only needs to be longer than the position of the lower end when the weight body 50 is suspended.

  The four second sling wires 70 are connected to the hanging ring portion 90a of the heavy object 90, respectively. The connection configuration is the same as that of the first embodiment. Specifically, as shown in FIG. 4C, the eye portion 70b provided at the lower end portion of the second sling wire 70 and the heavy object 90 are connected. It is the structure connected with the provided suspension ring part 90a by the shackle 80 (equivalent to a connection means).

  In the hanging tool 100 of this embodiment, four second sling wires 70 are connected to the four corners of the heavy load 90, and the weight 50 is on the axis of the first slung wire 20 and the center of gravity axis of the heavy load 90. It is arranged on the top. Therefore, the hanger 100 can be stably lifted or hung without shaking the covering block 90.

  As described above, also in the hanging tool 100 according to the present embodiment, the weight body 50 and the second sling wire 70 are arranged at positions below the floating body 30. With the above-described configuration, even when the work block 10 swings up and down and left and right due to waves during the slinging and demounting work on the covering block 90 that is attached to the bottom of the water, the danger of a diver's finger being caught is prevented. it can. Hereinafter, this point will be described based on the work procedure of FIG.

  FIGS. 5A to 5C are explanatory diagrams illustrating an example of a procedure for installation work of the covering block 90 using the hanging tool 100 of FIG. FIG. 5A shows a state of the hanging tool 100 when the covering block 90 is suspended. FIG. 5 (B) shows the state of the hanger 100 when the covering block 90 reaches the bottom of the water. FIG. 5C shows a state of the hanger 100 after the covering block 90 is removed.

  In FIG. 5A, the covering block 90 is suspended by the suspension tool 100. At this time, as described above, each part of the hanger 100 and the covering block 90 are arranged on the single axis J2 from the first sling wire 20, so that the covering block 90 can be stably suspended.

  As shown in FIG. 5B, when the covering block 90 reaches the bottom of the water, the weight body 50 then reaches the top surface of the covering block 90. Of course, the weight body 50 may be attached to the bottom of the water. At this time, the weight body 50 is made to bottom from the position of the hanging ring portion 90a of the covering block.

  The floating body 30 is prevented from being lifted upward by the weight body 50 that has reached the bottom, and is in a state of floating at a certain height in water. After the weight 50 is settled, the crane wire 13 is further unwound so that the first sling wire 20 is formed with a deflection T3 indicated by a dotted line. This bending T3 can be formed by the floating body 30 floating at the above-mentioned fixed height position. The bend T3 is formed with the upper wire clip 20b added to the first sling wire 20 as a fulcrum.

  Since the bottomed weight body 50 is a rectangular parallelepiped, the mounting state is stable. Since the length L1 of the second sling wire 70 is longer than the suspended length L2 of the weight body 50 as described above, the second sling wire 70 is bent at the time of bottoming. Since this bend T4 becomes a movable region when the diver removes the second slinging wire 70 (shackle 80) from the covering block 90, the working efficiency is high.

  Even when the work boat 10 swings up and down, left and right, the deflection T3 of the first sling wire 20 formed by the floating body 30 floating at a certain height position absorbs the swinging, so that the floating body The portion below 30 is not affected by swinging. Therefore, when the diver removes the second sling wire 70 from the covering block 90, the second sling wire 70 is not affected at all even if the work boat 10 swings vertically and horizontally. There is no risk of fingers being caught between the suspension ring portion 90a and the peripheral members, so that safe work can be performed.

  When the above-described ball removing operation is completed, the hoist 100 can be easily removed from the water by winding the crane wire 13 with the winch 12 as shown in FIG.

  In FIG. 5, the operation of placing the covering block 90 at a predetermined position on the bottom of the water and removing the hanging tool 100 has been described, but the hanging tool 100 of the present embodiment is hung on the covered covering block 90. Thus, the work for resetting to an appropriate position can be performed only by reversing the above description. Therefore, even when the slinging work of the hanger 100 is performed, it can be performed in the state shown in FIG. 5B, so that not only the work efficiency of the slinging work is good, but also the work can be performed safely by preventing the fingers from being pinched. .

(Modification 1)
Next, Modification 1 of the second embodiment will be described with reference to FIG. 6A. In the second embodiment, the case where the floating body 30 has the through hole 30a has been described as an example. However, even when the floating body 30 does not have the through hole 30a, the same technical idea can be applied. Only the differences will be described below.

  As shown in FIG. 6A, the hanging device 100 ′ of the first modification is a so-called multiple hanging type like the hanging device of the second embodiment.

The floating body 30 is the same in that it is disposed at a position below the first sling wire 20, but differs in that it is not mounted on the first sling wire 20.
The floating body 30 is provided with a ring-shaped eye portion 30 b at the lower end thereof, and is connected to the shackle 40 together with the eye portion 20 a of the first sling wire 20 and the hanging ring portion 50 a of the weight body 50. . Therefore, even in this case, the weight body 50 and the second sling wire 70 can be arranged at a position below the floating body 30 and the same effect as in FIG. 4 can be obtained.

(Modification 2)
Next, Modification 2 of the second embodiment will be described with reference to FIG. 6B.
The hanger 100 '' of the second modification is also based on the technical idea substantially the same as that of the second embodiment, and differences from the second embodiment will be described below.

  The hanger 100 '' of the second modification is a so-called multiple hanger type like the hanger of the second embodiment.

  However, the difference is that the weight body 50 that suppresses the buoyancy of the floating body 30 is not provided. In Modification 2, the weight of the second sling wire 70 ′ is made larger than the buoyancy of the floating body 30 in order to suppress the buoyancy of the floating body 30.

  As a means for this, it is conceivable to use a heavy second staking wire 70 '. Then, when the covering block 90 reaches the bottom, the heavy second slinging wire 70 ′ reliably suppresses the floating body 30 from being lifted, so that appropriate bending can be formed between the covering block 90 and the covering block 90. it can. Therefore, also in this embodiment, the same effect as described in the second embodiment can be obtained.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments described above, and various modifications are possible within the scope of the gist of the present invention described in the claims. It can be modified and changed.

1 (1, 1 ″), 100 (100 ′, 100 ″) Suspension tool 2, 20 First sling wire 3, 30 Floating body 3a, 30a Through hole 4, 6, 8, 40, 60, 80 Shackle 5 , 50 Weights 5a, 5b, 50a, 50b Suspension ring part 7, 70 Second sling wire 9, 90 Heavy object (covering block)
9a, 90a Suspension ring part 10 Work ship 11 Crane 12 Winch 13 Crane wire 14 Crane hook 15 Lifting tool 16 Rubble 17 Concrete block L1 Length of second sling wire L2 Suspension length of weight

Claims (10)

An underwater work suspension connected to a support wire suspended from the ship,
A first sling wire coupled to the support wire;
A floating body having buoyancy arranged on the first sling wire;
A second slinging wire having a connecting means for detachably hanging a heavy load, which is disposed at a position below the floating body;
A suspension for underwater work, characterized by comprising:   The underwater work hanger according to claim 1, wherein the weight of the second slinging wire is heavier than the buoyancy of the floating body. A lower body of the floating body further has a weight body that suppresses the buoyancy of the floating body,
2. The underwater work hanging tool according to claim 1, wherein the weight body and the second slinging wire are disposed at a position below the floating body.   The underwater work hanger according to claim 3, wherein the second slinging wire is disposed at a position below the weight body.   The underwater work hanger according to claim 3, wherein a length of the second sling wire is equal to or greater than a diameter of the heavy object.   The underwater work suspension device according to claim 3, wherein the first sling wire and the second sling wire are arranged on the same line. The weight body and the plurality of second staking wires are attached to a connecting annular member connected to the first staking wire and / or the floating body,
The underwater work suspension tool according to claim 3, wherein a length of the second slinging wire is longer than a suspension length of the weight body. The floating body is
The suspension tool for underwater work according to claim 1, further comprising means for adjusting buoyancy. The floating body is
The suspension tool for underwater work according to claim 1, wherein the floating shaft has a through hole in a central shaft portion thereof.   The underwater work hanger according to claim 3, wherein the weight is a rectangular parallelepiped.

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