JP6401937B2 - Working scaffold and installation method - Google Patents

Description

  The present invention relates to a work scaffold used when inspecting and repairing a lower surface of a water structure such as a pier, a bridge, or a quay facility, and an installation method thereof.

Since the underwater structure, for example, the lower surface of the pier is likely to deteriorate due to the influence of seawater, inspection and repair work is performed regularly and additionally as necessary.
Such inspection / repair work on the lower surface of the pier is performed by installing a work scaffold below the pier. Conventionally, a scaffold described in Patent Document 1 has been developed as this type of work scaffold.
This includes a scaffold member and a fixed support member attached below the water surface of a specific support pile among a plurality of support piles for supporting a pier, and a predetermined part of the scaffold member is fixedly supported by the fixed support member. Is provided with a setting means for setting the scaffold member in water and a floating means for floating the scaffold member on the water surface.

JP 2012-77578 A

However, in the above prior art, there are many assembly / installation (construction) operations under the jetty, and it takes time to install / remove, which hinders the ship mooring schedule, and strong winds and high waves due to typhoons (stormy weather) At times, the scaffold could be damaged.
For this reason, it is necessary to adjust the work schedule while avoiding mooring of the ship, and it is common to perform preliminary removal work by predicting stormy weather due to typhoons and the like. However, even when the removal work was performed in advance, the actual situation was that scaffolding accidents frequently occurred due to sudden changes to stormy weather.
In other words, on piers where ships are frequently detached and moored, and piers where mooring has become normal, inspection and repair work often cannot be performed until a long holiday (such as during consecutive holidays) such as a large holiday.
In addition, when stormy weather is predicted and removal work is performed in advance, if the stormy weather arrives early, a scaffolding accident will occur, and if it arrives late, in other words, if removal is too early, the result will be Will hinder the progress of work.

  The present invention has been made in view of the above circumstances, and can be installed and removed in a short time, and can be removed just before stormy weather due to the arrival of a typhoon, etc. In addition, the inspection / repair work schedule can be easily adjusted, and the progress of the work can be accelerated to shorten the time required for the entire inspection / repair work. It is an object of the present invention to provide a work scaffold capable of repair work and a method for installing the work scaffold.

In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that a plurality of aluminum alloy floating blocks each having a hollow box shape and symmetrically formed in the front and rear portions and the left and right portions are attached and detached in the front and rear direction. A work scaffold body that is connected freely and a plurality of the floating body blocks are connected via a connecting member that is detachable in the left-right direction, and is detachably provided on the outer peripheral side of the upper surface of the work scaffold body. installation of work platform to be installed and handrail, and corridors which are freely disposed detachably so as to close the upper opening between the floating blocks mutually positioned in the lateral direction, the work scaffolding includes a downwardly waters structure A working scaffold assembling step for assembling the working scaffold on the ground, a working scaffold lifting step for lifting the assembled working scaffold and floating it on the water surface, and a work floating on the water surface A work scaffold moving step for moving the scaffold to a position below the water structure, and a work for lifting the moved work scaffold from the bottom surface of the water structure to a height at a predetermined interval. Scaffolding lifting and lifting step, and working scaffold swinging that fixes the length of the work pipe that is lifted and floated by extending the upper end of the expansion pipe that supports the lower end and pressing it against the lower surface of the water structure And a fixing and fixing step .
According to a second aspect of the present invention, in the first aspect of the invention, in the work scaffold assembling step, a plurality of floating blocks are detachably connected in the front-rear direction, and the floating blocks are connected in the left-right direction A work block body is assembled by connecting a plurality of parts to each other via a detachable connection member, a handrail is provided on the outer peripheral side of the upper surface of the assembled work scaffold body, and a floating block located in the left-right direction A crossing corridor is provided so as to be detachable so as to close an upper opening between them.
The invention according to claim 3 is the invention according to claim 1 or 2, wherein, in the work scaffold assembling step, the floating block and the connecting member are connected by bolting or pinning. To do.
According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects of the present invention, the connecting member connects the floating body blocks to each other while preventing vertical displacement. It is characterized by comprising a connecting member and a horizontal connecting member for connecting floating body blocks to each other while preventing horizontal displacement .
The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the handrail and the passageway are made of an aluminum alloy .
According to the sixth aspect of the present invention , a plurality of aluminum alloy floating blocks each having a hollow box shape and having symmetrical shapes in the front and rear portions and the left and right portions are removably connected in the front-rear direction. A work scaffold body in which a plurality of blocks are connected via a connecting member that is detachable in the left-right direction, a handrail provided detachably on the outer peripheral side of the upper surface of the work scaffold body, and a position in the left-right direction. A floating corridor that is detachably provided so as to close the upper opening between the floating blocks, and a lifting hole provided in each floating block, and the floating block extends to the bottom plate side and the left and right side plate sides And a recess having a cover that can be opened and closed provided at an end portion in the front-rear direction facing the front-rear plate of the top plate, and the flange portion of the front-rear plate and the recess versus The position and which is formed with a floating body block coupling holes, are bolted through the floating body block coupling hole of said floating body block each other, the floating body block row is characterized by being composed.
A seventh aspect of the invention is characterized in that, in the sixth aspect of the invention, the connection between the floating block row and the connecting member is by bolting or pinning .
The invention according to claim 8 is the invention according to claim 6 or 7, wherein the connecting material is a vertical connecting material that connects the floating block rows while preventing positional displacement in the vertical direction, and the floating block. It is characterized by comprising a horizontal connecting member that connects the rows while preventing horizontal displacement.
The invention according to claim 9 is the invention according to any one of claims 6 to 8, wherein the handrail and the passageway are made of an aluminum alloy.

  According to the work scaffolding and its installation method according to the present invention, it can be installed and removed in a short time and can be removed immediately before stormy weather due to the arrival of a typhoon, etc. In addition, the inspection / repair work schedule can be easily adjusted, the progress of the work can be accelerated, and the time required for the entire inspection / repair work can be shortened. Work can be done.

1 is a perspective view showing a working scaffold according to a first embodiment of the present invention. It is an exploded perspective view similarly. Similarly, it is a front view (front view). Similarly, it is a right side view. It is a top view which shows the main body (working scaffold main body) of a working scaffold same as the above. It is a perspective view of the floating body block which comprises the scaffold main body for work same as the above. It is an exploded perspective view similarly. It is a perspective view which takes out and shows the vertical connection material in FIGS. 1-3, FIG. It is a perspective view which takes out and shows the horizontal connection material in FIG.1, FIG.2, FIG.5. It is a perspective view which takes out and shows the handrail in FIGS. It is a perspective view which takes out and shows the expansion-contraction pipe in FIG. It is a perspective view for demonstrating the work scaffold assembly process (before floating body block connection) in the installation method of the work scaffold of this invention. It is a perspective view for demonstrating a working scaffold assembly process (after floating body block connection) similarly. It is a perspective view for demonstrating a working scaffold assembly process (after right-and-left floating body block connection) similarly. It is a perspective view for demonstrating a working scaffold assembly process (at the time of completion | finish of working scaffold main body assembly) similarly. It is a side view for demonstrating the work scaffold lifting / lowering process in the installation method of a work scaffold same as the above. It is a side view for demonstrating a work scaffold moving process similarly. It is a side view for demonstrating a working scaffold lifting levitation | floating process similarly. It is a side view for demonstrating a work scaffolding swaying fixing process similarly. It is also a front view. It is a perspective view which shows the scaffold for work which concerns on 2nd Embodiment of this invention. It is a perspective view which similarly shows the working scaffold which concerns on 3rd Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol shows the same or an equivalent part between each figure.
A working scaffold according to a first embodiment of the present invention will be described with reference to FIGS.
1 to 4 each show the whole. The expansion pipe 33 in FIG. 2 is a member used at the time of installation. FIG. 4 shows the work scaffold partially omitted. FIG. 5 shows the work scaffold main body 100 with a part thereof omitted. FIG. 6 shows the floating body block 1 in FIGS. FIG. 7 shows an exploded view of the floating block 1 shown in FIG. 8 shows the vertical connecting member 22 in FIGS. 1 to 3 and 5, and FIG. 9 shows the horizontal connecting member 23 in FIGS. 1, 2 and 5. 10 shows the handrail 31 taken out from FIGS. 1 to 4 and FIG. 11 shows the telescopic pipe 33 taken out from FIG.
In addition, in order to avoid the complication of a code | symbol, the code | symbol is not attached | subjected to all the illustration members. It is convenient to refer mainly to FIGS. 2, 5, and 6 for the reference numerals of the members not provided with the reference numerals.

As can be seen from FIGS. 1 to 4, the working scaffold according to the first embodiment includes a plurality of, in this case, six, floating blocks 1, three in the front-rear direction (longitudinal direction) and the left-right direction (short direction). The work scaffold main body 100 (see FIG. 5) is provided in which two, that is, three in one row are arranged in two rows and connected to each other.
As shown in FIG. 6, the floating block 1 is formed in a hollow box shape in which the top plate 2 and the bottom plate 3 are arranged in parallel, in this case, a rectangular parallelepiped shape.
Specifically, as shown in FIG. 7, the floating body block 1 has a box body that is reinforced by three reinforcing frames 4 that are open on the upper surface and arranged in the front-rear direction, and an upper surface opening of the box body. And the top plate 1 parallel to the bottom plate 3 of the box body (the top plate 1 cannot be opened and closed after the top plate 1 is welded to the upper surface opening of the box body). Among the three reinforcing frames 4, the central reinforcing frame 4 is disposed at the center in the longitudinal direction of the box. The remaining two reinforcing frames 4 are disposed at appropriate positions in the front-rear direction that are line-symmetric with respect to the position of the central reinforcing frame 4.
The front and rear plates 5 and 6 of the floating block 1 are formed to have flange portions 5a and 6a extending to the bottom plate 3 side and the left and right side plates 7 and 8 of the floating block 1, and the flange portions 5a and 6a include A floating block connecting hole 9 is formed. A plurality of floating block connecting holes 9 are formed at appropriate intervals on the left and right sides and the lower side of the flange portions 5a and 6a.
The flange portions 5 a and 6 a are not formed on the top plate 2 side of the floating block 1. This is because if the flange portions 5a, 6a protrude on the top plate 2, the operator may scoop. On the top plate 2 side, the floating block connecting holes 9 are formed in the front and rear plates 5, 6 themselves. ing. There are also a plurality of floating body block connection holes 9 on the top plate 2 side, two in this case. Inserting bolts (not shown) into the floating body block connection holes 9 at this location and tightening the nuts are performed by using the top plate 2. In the recess 10 provided in Reference numeral 10 a indicates a cover for opening and closing the recess 10.
Further, the floating block 1 is provided with a lifting member 12 having a lifting hole 11 at the center in the upper front-rear direction of the outer surfaces of the left and right side plates 7 and 8 (a position substantially corresponding to the arrangement position of the central reinforcing frame 4). ing.
In addition, each of the top plate 2 and the bottom plate 3 has vertical connecting material mounting holes 13 at appropriate positions in the front-rear direction (positions substantially corresponding to the positions where the two reinforcing frames 4 are disposed excluding the central reinforcing frame 4). A vertical connecting member mounting member 14 is provided. Horizontally connected to the upper sides of the outer surfaces of the left and right side plates 7 and 8 of the floating block 1 and at a predetermined distance from the position where the central reinforcing frame 4 is disposed to the front and rear plates 5 and 6 of the floating block 1. Two horizontal connecting material mounting members 16 having material mounting holes 15 are provided. The arrangement positions of the two horizontal connecting member attachment members 16 are shifted in the vertical direction.
In addition, on the upper side of the outer surfaces of the left and right side plates 7 and 8 of the floating block 1, at an appropriate position that does not overlap with the arrangement positions of the lifting member 12, the vertical connecting member mounting member 14, and the horizontal connecting member mounting member 16, A handrail support cylinder 17 is provided.
Each floating block 1 is made of an aluminum alloy, and the shapes of the front and rear portions and the left and right portions thereof are formed symmetrically. This is because, even when the floating blocks 1 described later are connected to each other, even if the front and rear directions are reversed, no difference occurs in the direction after the connection (the rework operation for reversing the direction is not generated).
In addition, the code | symbol 18 in FIG.1, FIG.2, FIG.5-7 shows the expansion-pipe support member which supports the lower end of the expansion-contraction pipe (pipe support) 33 mentioned later. The telescopic pipe support member 18 is provided at the approximate center in the front-rear direction on the left and right sides of the top plate 2 of the floating block 1.

In the first embodiment, six floating body blocks 1 (see FIG. 6) configured as described above are prepared, and these are connected by the following members to form a working scaffold body 100 (see FIG. 5). The
That is, in the first embodiment, bolts and nuts (connectors) for detachably connecting the floating block 1 in the front-rear direction using the floating block connecting holes 9 drilled in the flange portions 5a and 6a of each floating block 1. 21 is provided. Moreover, the vertical connection material 22 (refer FIG. 5, FIG. 8) and the horizontal connection material 23 (refer FIG. 5, FIG. 9) for connecting the floating body block 1 to the left-right direction are provided.
Then, a set pin (connector) 24 for detachably connecting the vertical connecting member 22 to the floating body block 1 and a bolt / nut (connector) 25 for detachably connecting the horizontal connecting member 23 to the floating body block 1 are provided. (See FIG. 5).
The vertical connecting member 22 is a frame-like member that connects the left and right floating blocks 1 while preventing vertical displacement, and set pin insertion holes through which the set pins 24 are inserted above and below the left and right ends. 26 is drilled.
The horizontal connecting member 23 is a rod-shaped body that connects the left and right floating blocks 1 while preventing horizontal displacement, and is used by assembling two pieces vertically in an X shape. Bolt insertion holes 27 through which the bolts of the connector 25 are inserted are formed at both ends of each horizontal connecting member 23. The two horizontal connecting members 23 constitute a brace.

And the three floating body blocks 1 are connected to the front-back direction by the connecting tool 21 using the said floating body block connection hole 9, and this is performed about right and left three each and two rows.
For these two rows of floating blocks, the vertical connecting member mounting hole 13 and the horizontal connecting member mounting hole 15 provided on the floating block 1 side shown in FIGS. 5 and 6, the vertical connecting member 22 shown in FIGS. Using the set pin insertion holes 26 and the bolt insertion holes 27 provided at both ends of the horizontal connection member 23, the left and right floating body blocks 1 are detachably connected to each other by connectors 24 and 25 as shown in FIG. To do. The vertical connecting member 22 and the horizontal connecting member 23 are also detachable from the floating block 1.
Since the floating body block 1 has the flange portions 5a and 6a and the floating body block connecting holes 9 formed in the flange portions 5a and 6a at the same position for all the floating body blocks 1, the front and rear direction of each row after the connection is established. The positions in the vertical direction and the horizontal direction of the floating body block 1 located at the same position are aligned.
Similarly, since the vertical connecting member mounting holes 13 and the horizontal connecting member mounting holes 15 provided in the floating block 1 are also in the same position for all the floating blocks 1, the upper and lower portions of the floating block 1 positioned in the left and right direction after the connection are connected. The positions in the direction and the front-rear direction are aligned.
Thus, the working scaffold main body 100 shown in FIG. 5 is configured.

The first embodiment includes handrails 31 (31a to 31c) that are detachably provided on the outer peripheral side of the upper surface of the working scaffold main body 100 configured as described above. A crossing corridor 32 (32a to 32c) is provided that closes the upper opening between the floating blocks 1 located at (see FIGS. 1 to 4).
The handrail 31 has a lower end portion 31d (see FIG. 10) of the column portion positioned on the left and right sides of the working scaffold main body 100 in the handrail support cylinder portion 17 provided on the outer surfaces of the left and right side plates 7 and 8 of the floating block 1. It is inserted into the handrail support cylinder portion 17 so as to be adjustable in height, and is detachably fixed at a predetermined height.
The passage corridor 32 is also detachable. Here, it mounts so that the upper opening between floating body blocks 1 may be plugged up. The crossing corridor 32 has a stopper piece (not shown) protruding downward so as not to shift and move to the horizontal front-rear left-right side, at least the horizontal left-right side.
The handrail 31 and the passageway corridor 32 are prepared in a plurality of types in which shapes, dimensions, etc. are set according to the arrangement position, and here, three types (31a to 31c, 32a to 32c) are prepared, and the type corresponding to the arrangement position is selected. And used.
In the first embodiment, expanded metal is used as the crossing corridor 32, but is not limited thereto. The height position of the upper surface of the transfer hallway 32 is aligned with the same height as the top plate surface of the floating block 1 (upper surface of the top plate 1). Moreover, the handrail 31 and the passage corridor 32 are both made of an aluminum alloy, and are coated as necessary. Basically, the handrail 31 is painted.
As described above, the working scaffold 200 according to the first embodiment shown in FIG. 1 is configured.
Needless to say, the working scaffold 200 (also the floating block 1 and the working scaffold body 100) can float on the water surface.

The work scaffold 200 is assembled on the ground near a water structure such as a pier to be installed, and is then installed below the water structure to be used for inspection and repair work on the bottom surface of the water structure.
Hereinafter, the installation method of the said working scaffold 200 is demonstrated with reference to FIGS.
First, a work scaffold assembling step for assembling the work scaffold 200 on the ground is executed (see FIGS. 12 to 15). Details of the assembly of the working scaffold 200 on the ground will be described later.

When the assembly of the work scaffold 200 on the ground is finished, the work scaffold lifting and lowering process is executed. That is, as shown in FIG. 16, the assembled working scaffold 200 is lifted and moved by a crane 51 such as a rough terrain crane, and lowered to the water surface 61 near the water structure 300 such as a pier to be inspected and repaired. . In the figure, reference numeral 310 denotes a support column of the water body structure 300.
The lifting movement of the working scaffold 200 is performed using the floating block connecting hole 9 located at the uppermost portion of the floating block connecting holes 9 formed in the flange portions 5a and 6a of the floating block front and rear plates 5 and 6. . The floating block connecting hole 9 located at the uppermost part is also used as a lifting hole and has a diameter larger than that of the other floating block connecting holes 9.
The lifting movement is performed by, for example, shackles (see FIG. 4) in the floating block connecting holes 9 which are also used as lifting holes and which are diagonally opposite to each other in the plan view formed by the nine floating blocks 1 constituting the work scaffold 200. Install (not shown). Then, the shackle and the hanging jig 41 are connected by a rope 42, and one end of a rope 43 whose other end is engaged with the hook 52 of the crane 51 is connected to the hanging jig 41, and the crane 51 is pulled up by the operation of the crane 51. Do by moving.

The shut cycle, may be attached to the floating body block connecting hole 9 of lifting holes combined at four positions located at the opposing corners of a rectangular shape as viewed in plan which right and left two floating bodies blocks 1 forms located in the front-rear direction center. In this case, the four positions are positions each longitudinal two lifting holes, functioning as the floating block coupling hole 9 of the floating body block 1 are overlapped, it shuts cycle is bolts and nuts (coupling) of the point Each of them is attached in place of 21.
In this case, moving each shuts cycle, each other end knot one end of the rope 43 engaged with the hook 52 of the crane 51, pulled up by operating the crane 51, lifting the work platform 200 by moving To do. In this example, each shut cycle, the flange portion 5a of the floating body block 1, 6a are attached to the two superposed four positions, since the work platform 200 lifted at the location of each 2 ply, more robust Can be lifted.

Next, as shown in FIG. 17, the work scaffold 200 that moves on the water surface 61 is moved to a desired position below the water structure 300 (where the work scaffold 200 is installed). Execute the process. The working scaffold 200 is moved by, for example, towing with a boat (not shown) on the water surface 61 or a winch 71 or the like locked to an appropriate location on the water structure 300.
Next, as shown in FIG. 18, the working scaffold 200 is lifted and floated from the water surface 61 to a height spaced from the lower surface 301 of the water body structure 300 by a predetermined interval, as shown in FIG. 18. The floating of the working scaffold 200 is performed using a winch 71 or the like.
Finally, the work scaffolding stabilization process is performed. That is, as shown in FIGS. 19 and 20, the lower end of the elastic pipe 33 is supported by the elastic pipe support member 18 of the working scaffold 200, and the upper end of the elastic pipe 33 is extended to the lower surface 301 of the water structure 300. The length is fixed in the pressed state, that is, in a state in which the telescopic pipe 33 is stretched between the work scaffold 200 and the water structure 300.
Thus, the installation of the work scaffold 200 is completed.
Removal of the work scaffold 200 from the installation location to the ground and disassembly on the ground can be performed by reversing the above-described assembly and installation procedures.

Assembly of the work scaffold 200 on the ground in the work scaffold assembly process is performed, for example, according to the procedure shown in FIGS.
First, the board 40 is arranged at the assembly position of the floating block 1 in the assembly area on the ground near the water structure 300 to be inspected and repaired, and the floating block 1 is used by using a crane (not shown) such as a truck crane. Lift and place in place. This is repeated for the six floating body blocks 1, and the arrangement of the floating body blocks 1 in two rows and six in one row is performed (see FIG. 12).
Each of the floating blocks 1 is formed so that the front and rear portions and the left and right portions are symmetrically formed. Therefore, it is not necessary to pay attention to the front and rear directions when the floating block 1 is arranged.
The lifting movement of the floating body block 1 when the floating body block arrangement, for example, attaching a shackle lifting hole 11 of lifting member 12 provided on the right and left side plates 7, 8 of the floating body block 1 (not shown), this shut The crane is connected to the hook of the crane with a rope (not shown), and the crane is operated to pull up and move.
As shown in FIG. 12, eight board blocks 40 are not arranged from the beginning, and each time the connection of two floating body blocks 1 to be described later is finished, the board 40 relating to the connection of the next floating body block 1 is arranged. You may do it.
In FIG. 12, the flange portions 5 a and 6 a of the floating block 1 are placed on the board 40, but an intermediate portion between the front and rear plates 5 and 6 of the floating block 1 may be placed on the board 40. Good.

Next, three front and rear directions (longitudinal directions) and two rows of floating blocks 1 are connected. Specifically, the floating block 1 at the center in the front-rear direction of each of the left and right rows is connected to the front and rear floating blocks 1. The connection is performed by tightening a bolt (using a connector 21) with a nut passed through the floating block connecting hole 9 of the flange portions 5a and 6a formed on the front and rear plates 5 and 6 of the floating block 1 (using the connector 21) (see FIG. 13). Since the flange portions 5a and 6a and the floating body block connection holes 9 of the flange portions 5a and 6a are in the same position for all the floating body blocks 1, the vertical and horizontal directions of both floating body blocks 1 positioned in the front-rear direction after the connection. The positions of are aligned. As the bolt, an insulating bolt is used in order to prevent electric corrosion due to contact with different metals.
In addition, the connection of the floating body block 1 in the front-rear direction is performed by tightening a nut to a bolt passed through a floating body block connection hole 9 formed on the top plate 2 side of the front and rear plates 5 and 6 of the floating body block 1 (connector 21 is connected). It is also done by bolting). This bolting is performed in the recess 10 by opening the cover 10 a of the recess 10 (see FIG. 7) provided on the top plate 2. After bolting, the cover 10a of the recess 10 is closed so that the cover 10a does not protrude from the top plate surface.
As shown in FIG. 12, the floating body block 1 is not arranged in one row (three) or two rows (six) as shown in FIG. The necessary floating body blocks 1 may be sequentially arranged and connected so as to connect the floating body blocks 1.

Next, the floating block 1 in the left-right direction is connected.
This connection is performed by six vertical connecting members 22 and six horizontal connecting members 23 (see FIG. 14). Specifically, the vertical connecting member 22 is placed between the vertical connecting member attaching members 14 provided on the top plate 2 and the bottom plate 3 of the floating block 1 and opposed to each other by the arrangement of the floating block 1 at the assembly position. Then, the set pin insertion holes 26 (see FIG. 8) opened up and down on the left and right sides of the vertical connecting member 22 are formed in the vertical connecting member attaching member 14 and aligned with the vertical connecting member attaching hole 13 (see FIG. 6). Then, the set pin 24 is inserted (pinned) from the left and right to connect the left and right floating blocks 1 while preventing the vertical displacement of the left and right floating blocks 1. On the lower end side of the set pin 24, a retaining pin (not shown) of the set pin 24 is detachably attached.
This connection is performed for two sets of left and right floating body blocks 1, a total of three sets, and six vertical connection members 22.

After the connection of the left and right floating blocks 1 with the vertical connection member 22, or within a range (procedure) that does not hinder the connection operation with the vertical connection member 22, The floating block 1 is connected by the horizontal connecting member 23.
Specifically, a horizontal connecting member mounting member 16 disposed on the front end side of the left side plate 7 of the right floating body block 1 and a horizontal connection disposed on the rear end side of the right side plate 8 of the left floating body block 1. One horizontal connecting member 23 is bridged between the material connecting member 16 and the bolt insertion holes 27 (see FIG. 9) at both ends of the horizontal connecting member 23 are connected to the horizontal connecting member attaching hole 15 of the horizontal connecting member 16. A bolt is inserted from above according to each (see FIG. 6), and a nut is fastened to the bolt (bolt tightened by the connecting tool 25).
Subsequently, a horizontal connecting member mounting member 16 disposed on the front end side of the right side plate 8 of the left floating block 1 and a horizontal connecting member mounted on the rear end side of the left side plate 7 of the right floating block 1. Another horizontal connecting member 23 is bridged between the members 16 and bolt insertion holes 27 (see FIG. 9) at both ends of the horizontal connecting member 23 are connected to the horizontal connecting member mounting holes 15 ( A bolt is inserted from above in accordance with each of them (see FIG. 6), and a nut is tightened on the bolt (bolt tightened by the connecting tool 25).
As a result, the left and right floating blocks 1 are connected to each other while preventing horizontal displacement of the left and right floating blocks 1 by the two horizontal connecting members (braces) 23 assembled in an X shape vertically.
This connection is performed for two horizontal blocks 23 for a set of left and right floating blocks 1, for a total of three sets of six horizontal connection members 23.
The vertical connecting member mounting hole 13 and the horizontal connecting member mounting hole 15 (vertical connecting member mounting member 14 and horizontal connecting member mounting member 16: see FIG. 6) provided in the floating block 1 are at the same position for all the floating blocks 1. Therefore, after the connection, the positions in the vertical direction and the front-rear direction of both floating body blocks 1 positioned in the left-right direction are aligned.
Thus, the assembly of the working scaffold body 100 is completed (see FIG. 14).

When the assembly of the working scaffold main body 100 is completed, handrails 31 (31a to 31c) are provided detachably on the outer peripheral side of the upper surface of the working scaffold main body 100 as shown in FIG. That is, the lower end portion 31d (see FIG. 10) of the support column of each handrail 31 is inserted into the handrail support cylinder 17 provided on the outer surface of the left and right side plates 7 and 8 of the floating block 1, and can be removed at a predetermined height. Fix it.
Moreover, the crossing corridor 32 (32a-32c) is provided so that the upper opening between the floating body blocks 1 located in the left-right direction of the working scaffold main body 100 may be closed. Here, the transit hallway 32 is simply placed at a position that closes the upper opening between the floating blocks 1 and can be easily attached and detached.
This completes the assembly of the working scaffold 200 (see FIGS. 15 and 1).

In the working scaffold 200 according to the first embodiment described above, the floating block 1 as the main part is in a rectangular parallelepiped shape in which the top plate 2 and the bottom plate 3 are arranged in parallel, that is, compact and easy to handle in unloading, etc. The shape of each of the parts and the left and right parts is symmetrical, and the parts can be arranged and assembled without paying attention to the front and rear directions. Moreover, the floating body block 1 and the floating body block 1 and the connecting members 22 and 23 are detachably connected, and particularly connected by bolting or pinning, and the handrails 31 (31a to 31c) and the transit hallway 32 (32a to 32a). 32c) is also provided so as to be detachable, and the floating block 1, the handrail 31 and the passageway 32 are made of aluminum alloy.
Therefore, according to the working scaffold 200 according to the first embodiment, it is extremely easy to handle in preparation, execution, etc. of assembly, disassembly / removal, movement, etc. by the floating block 1, and its assembly, disassembly / removal, movement, etc. are extremely easy. Easy and quick. That is, it can be installed and removed in a short time. Therefore, it can be removed immediately before stormy weather due to the arrival of a typhoon or the like, and the damage accident due to sudden change to stormy weather is remarkably reduced. Therefore, the inspection / repair work schedule can be easily adjusted, the progress of the work can be accelerated, and the time required for the entire inspection / repair work can be shortened. The effect of being able to do it can be demonstrated.
Further, according to the above-described method for installing the work scaffold 200, the assembly, movement, etc. of the work scaffold 200 itself can be performed extremely simply and quickly as described above, so that the work scaffold 200 can be easily and quickly installed. Yes. In other words, it can be installed in a short time, the adjustment of the inspection / repair work schedule becomes easy, the progress of the work can be accelerated and the time of the entire process of inspection / repair work can be shortened. The effect of being able to perform inspection and repair work without waiting for the holidays is exhibited.

  In the first embodiment described above, the number of connected floating blocks 1 in the front-rear direction is three (three in one row) as shown in FIG. 1, but is not limited to this. For example, as in the second embodiment shown in FIG. 21, the number of connected floating blocks 1 in the front-rear direction may be two (two in one row). According to the second embodiment, the same effect as in the first embodiment can be exhibited.

  Further, the work scaffold 200 may be configured by connecting a plurality of floating blocks 1 only in the left-right direction, for example, two in the left-right direction as in the third embodiment shown in FIG. Also in the third embodiment, the left and right floating body blocks 1 are detachably connected by the vertical connecting member 22 and the horizontal connecting member 23, and can be easily assembled and disassembled. Further, the working scaffold 200 may be configured by combining the floating blocks 1 in a “U” shape and detachably connecting them.

  1: floating block, 2: top plate, 3: bottom plate, 5: front plate, 6: rear plate, 5a, 6a: flange, 7: left side plate, 8: right side plate, 21: bolt and nut (connector) , 22: vertical connecting material, 23: horizontal connecting material (brace), 24: set pin (connecting tool), 25: bolt and nut (connecting tool), 31 (31a-31c): handrail, 32 (32a-32c) : Crossing corridor (expanded metal), 33: Telescopic pipe (pipe support), 40: Wood block, 41: Hanging jig, 51: Crane, 61: Water surface, 71: Winch, 100: Work scaffold body, 200: Work Scaffold, 300: water structure.

Claims (9)

A plurality of aluminum alloy floating blocks formed in a hollow box shape and symmetrically formed in the front and rear portions and the left and right portions are detachably connected in the front-rear direction, and the floating blocks are detachable in the left-right direction. A working scaffold body connected by a plurality of connecting members;
A handrail detachably provided on the outer peripheral side of the upper surface of the working scaffold main body,
There in the installation method of the work platform to be installed and corridors which is freely disposed detachably so as to close the upper opening between the floating blocks mutually positioned in the lateral direction, the work scaffolding it includes a downwardly waters structure And
A work scaffold assembly process for assembling the work scaffold on the ground;
Lifting and lowering the assembled work scaffold and lowering it to the surface of the water;
A work scaffold moving step of moving the work scaffold floated on the water surface to a position below the water structure, on the water surface;
Lifting and lifting the working scaffold for lifting the lifted work scaffold from the water surface to a height spaced from the lower surface of the water structure by a predetermined distance;
A working platform anti-swaying fixing step of fixing the length of the telescopic pipe that supports the lower end of the suspended working scaffold and extending the upper end of the extension pipe so as to be in pressure contact with the lower surface of the water structure. A method for installing a working scaffold characterized by the above . In the work scaffold assembly process,
A plurality of floating blocks are detachably connected in the front-rear direction, and a plurality of the floating blocks are connected via a detachable connecting member in the left-right direction to assemble the work scaffold main body. The work according to claim 1, wherein a handrail is detachably provided on the outer peripheral side of the upper surface of the scaffold main body, and a crossover corridor is provided detachably so as to close an upper opening between the floating blocks located in the left-right direction. How to install a scaffold. 3. The work scaffold installation method according to claim 1 , wherein, in the work scaffold assembling step, the floating block and the connecting member are connected by bolting or pinning . The connecting member is composed of a vertical connecting member that connects the floating blocks to each other while preventing vertical displacement, and a horizontal connecting member that connects the floating blocks to each other while preventing horizontal displacement. The installation method of the working scaffold of any one of Claims 1-3 to do. The said handrail and the said passage corridor are the products made from aluminum alloy , The installation method of the working scaffold of any one of Claims 1-4 characterized by the above-mentioned . A plurality of aluminum alloy floating blocks formed in a hollow box shape and symmetrically formed in the front and rear portions and the left and right portions are detachably connected in the front-rear direction, and the floating blocks are detachable in the left-right direction. A working scaffold body connected by a plurality of connecting members;
A handrail detachably provided on the outer peripheral side of the upper surface of the working scaffold main body,
A passageway provided detachably so as to close the upper opening between the floating blocks located in the left-right direction,
A lifting hole provided in each of the floating blocks,
The floating block includes a front and rear plate formed with flange portions extending to the bottom plate side and the left and right side plate side, and a recess having a cover that can be opened and closed provided at a front and rear end portion facing the front and rear plates of the top plate, A floating block connecting hole is formed at a position corresponding to the flange portion of the front and rear plates and the recess,
The floating block each other of said bolted through the floating block coupling holes, working scaffolding, characterized in that the floating body block row is formed. The coupling of the floating body block row and said connecting member is working scaffolding according to claim 6, wherein the bolted or pinned.   The connecting member is composed of a vertical connecting member that connects the floating block rows while preventing vertical displacement, and a horizontal connecting member that connects the floating block rows while preventing horizontal displacement. The work scaffold according to claim 6 or 7, characterized by the above.   The work scaffold according to any one of claims 6 to 8, wherein the handrail and the passage corridor are made of an aluminum alloy.

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