JP2023083442A - Slab moving method and slab moving device - Google Patents

Abstract

To provide a heavy object moving method using a heavy object moving device that easily carries a heavy object into and out of a site and is easily installed in a construction site, and a heavy object moving device.SOLUTION: There is provided a heavy object moving method using a heavy object moving device to lift and move heavy objects by a heavy object moving device that includes a transverse rail, a pair of gate-shaped frames provided facing each other in the vicinity of both ends of the transverse rail and a lifting heavy mechanism that travels along the transverse rail. The gate-shaped frames comprise a pair of pillars that can be stretched in the height direction, a connection beam that connects the upper ends of the pillars and can be stretched in the longitudinal direction. The moving method includes steps of unfolding and installing the gate-shaped frames in which the pillars and the connection beam are shortened, lifting and moving a heavy object by making the heavy mechanism travel along the transverse rail with a heavy object being suspended and down-sizing to minimum the unfolded gate-shaped frames by shortening both the pillars and the connection beam.SELECTED DRAWING: Figure 2

Description

The present invention relates to a floor slab moving method and a floor slab moving apparatus.

Conventionally, in the bridge deck replacement method of replacing the existing deck slab installed on the I-shaped main girder with a new deck, when removing the existing deck Cut the existing floor slab to shape. After that, a method is known in which a lifting device such as a crane is used to lift the cut piece of the existing floor slab and move it to the bed of a transport vehicle (for example, Patent Document 1).

JP 2018-204427 A

To easily carry a floor slab moving device to a site.

A heavy object moving method using a heavy object moving apparatus according to one embodiment comprises a traversing rail, a pair of gate-shaped frames provided in the vicinity of both ends of the traversing rail, and traveling along the traversing rail. A heavy object moving method for lifting and moving a heavy object using a heavy object moving device comprising a lifting mechanism, wherein the gate-shaped frame comprises a pair of struts that can be stretched in a height direction, and the struts. a step of unfolding and installing the gate-shaped frame in a state in which the columns and the connecting beams are shortened; A step of moving the lifting mechanism in a held state along the traverse rail to lift and move the heavy object; and minimizing the gantry frame.

In one embodiment, a heavy object moving apparatus includes a traverse rail, a pair of gate-shaped frames provided facing each other in the vicinity of both ends of the traverse rail, and a lifting mechanism that travels along the traverse rail. wherein the portal frame has a pair of struts that are stretchable in the height direction, and a connection beam that connects upper ends of the struts and is stretchable in the longitudinal direction. Characterized by

According to the method for moving a heavy object using the heavy object moving device and the heavy object moving device of one embodiment, the portal frame connects a pair of struts that can extend and contract in the height direction and the upper ends of the struts. and a connecting beam that can be stretched in the longitudinal direction. As a result, the shortest length of the struts is set to a height that allows passage on the road when the trailer is loaded, and the shortest length of the connecting beams is connected at intervals that fit within the width that allows the trailer to be loaded. By setting the length to be as long as possible, the heavy object moving device can be loaded on a trailer and carried in and out of the construction site without disassembly.

On the other hand, when carrying out lifting work of heavy objects, the gantry frame can be made to the desired size by extending the struts and connecting beams without assembling work after transporting it to the construction site by trailer. , and install it.

Therefore, there is no need to perform assembly and disassembly work each time the heavy object moving device is carried in and out at the construction site, and workability can be greatly improved. In addition, since it can be carried in and out with a single trailer, transportation costs can be reduced compared to the case where multiple transportation vehicles are required, contributing to shortening the construction period and reducing construction costs.

Furthermore, in the prior art, space is required to install two lifters, which are common devices on the market, and a total of eight columns. Since it is a structure with , the space for installing a total of four columns is sufficient, and it can be installed in a narrow space. In addition, when installing a heavy object moving device at a construction site, the struts and connecting beams of the gate-shaped frame can be extended and deployed to the desired length, ensuring the desired width of the inner space that will be the work area. becomes possible.

In one embodiment of the heavy load moving apparatus, one end of the traverse rail is provided to protrude outward from the pair of opposing portal frames, and a loading hoist is provided at one end of the traverse rail. It is characterized by being provided.

According to the heavy object moving apparatus of one embodiment, since the loading hoist is provided at one end of the traversing rail, the lifting mechanism that lifts the heavy object travels along the traversing rail to traverse the heavy object. After moving to one end of the rail, it can be replaced with a loading hoist and the heavy load can be lifted again. As a result, while the load hoist is used to load the heavy object onto the transport vehicle, the lifting mechanism can be used to move the heavy object, thereby significantly improving the work efficiency.

A heavy object moving apparatus of one embodiment is characterized in that a side panel is provided on a side surface parallel to the transverse rail.

According to the heavy object moving device of one embodiment, the side panel functions as a protector for the work area set in the inner space. Therefore, for example, when applying the heavy object moving device to road construction, even if the road construction progresses in the work area in the inner space while general vehicles are allowed to pass on the side of the heavy object moving device, work safety is ensured. can be improved.

In one embodiment of the heavy object moving apparatus, the lifting mechanism is provided with a floor slab removing device for removing the existing floor slab from the main girder of the bridge.

According to the heavy object moving device of one embodiment, since the floor slab removal device is supported by the lifting mechanism, when the existing floor slab is removed from the main girder of the bridge, the cut is cut so that it can be loaded onto the transport vehicle. Remove the piece by tearing it off the main girder using the floor slab removal device. Next, the cut piece and the floor slab removing device are lifted by the lifting mechanism, and the hoisting machine is run along the traversing rail to move the cut piece together with the floor slab removing device. After that, if the cut piece is removed from the floor slab removing device, the cut piece can be carried out from the construction site.

As a result, a series of operations from removing the cut piece to carrying it out can be performed using the heavy object moving device, and the work efficiency can be greatly improved. In addition, since the floor slab removing device can be supported by the lifting mechanism at all times, a temporary storage space for the floor slab removing device is not required, and a wide work area can be secured.

It becomes easy to carry the floor slab moving device to the construction site.

It is a figure which shows a mode that the heavy-goods moving apparatus in embodiment of this invention was loaded on the trailer. It is a figure which shows the rear surface of the heavy-goods moving apparatus in embodiment of this invention. 1 is a diagram showing a side cross section (AA cross section) of a heavy object moving device according to an embodiment of the present invention; FIG. It is a figure which shows the lifting mechanism in embodiment of this invention. It is a figure which shows the turning rail and turning trolley in embodiment of this invention. It is a figure which shows the floor slab removing apparatus in embodiment of this invention. It is a figure which shows the procedure which removes and moves the cut piece of an existing floor slab from a main girder using the heavy load moving apparatus in embodiment of this invention (1). FIG. 2 is a diagram showing a procedure for removing and moving a cut piece of an existing floor slab from a main girder using the heavy object moving device according to the embodiment of the present invention (No. 2); FIG. 5 is a diagram showing a procedure for arranging a new floor slab piece on a site where a cut piece of an existing floor slab has been removed using the heavy object moving device according to the embodiment of the present invention;

A heavy object moving apparatus according to the present invention is an apparatus for lifting and moving a heavy object, and has a structure that can be loaded on a trailer and can be deployed to a desired height and width at a construction site. It is. In this embodiment, a case of applying a heavy object moving device to a bridge deck replacement construction method for replacing an existing deck slab installed on an I-shaped main girder of a highway bridge with a new deck slab will be described as an example. I will explain the details.

In the floor slab replacement method, when replacing an existing floor slab with a new floor slab, the existing floor slab is cut into pieces of a size that can be loaded onto the carrier of a transport vehicle. Work is carried out from moving from the main girder to loading onto a transport vehicle.

≪≪Heavy goods moving device≫≫
As shown in FIGS. 1(a) and 1(b), the heavy object moving device 100 has a structure in which the size can be changed to a length L, a width W, and a height H that can be loaded on a trailer T. 2, a telescopic frame mechanism 10 having a pair of gate-shaped frames 12, a lifting mechanism 20 that moves along a traverse rail 11 that spans the pair of gate-shaped frames 12, and the lifting mechanism 20. and a floor slab removing device 30 installed.

≪Telescopic frame mechanism≫
As shown in FIGS. 2 and 3, the telescopic frame mechanism 10 is arranged in parallel with a pair of portal frames 12, a pair of connecting trusses 15 connecting the portal frames 12, and the connecting trusses 15. As shown in FIG. 2, the gate-shaped frame 12 includes a pair of pillars 13 spaced apart and a connecting beam 14 connecting the pair of pillars 13 near their upper ends. It is composed of

Any lifting device having a telescopic mechanism may be used as the column 13, but in this embodiment, a hydraulic jack is used, and as shown in FIG. 132 are positioned below. Further, the shortest length of the strut 13 is set to a height H that allows road traffic when loaded on a trailer T, as shown in FIG. 1(b).

As shown in FIG. 2, the connecting beam 14 is provided with a telescopic mechanism whose length can be adjusted at both ends thereof. The length is set so that it can be connected at intervals within the width W that can be loaded on the trailer T.

In addition, as shown in FIG. 2, a brace member 121 is provided at the connection between the support column 13 and the connecting beam 14 for reinforcement. The brace member 121 is configured by an expansion device such as a screw-type expansion member or a hydraulic jack so as to follow the expansion of the portal frame 12 as described above. is rotatably connected to the

The connecting truss 15 connects a pair of gate-shaped frames 12 arranged in parallel at an interval shorter than the length L that can be loaded onto the trailer T, and constitutes the gate-shaped frames 12 as shown in FIG. Two of them are arranged in parallel at the same interval as the pair of supporting posts 13 . Between the two connecting trusses 15, two traversing rails 11 are arranged parallel to them with a predetermined interval.

As shown in FIG. 3 , each of the two traversing rails 11 is installed on the lower surface side of the connecting beam 14 so as to bridge the pair of gate-shaped frames 12 . Its length is longer than that of the connecting truss 15 and is formed to have a maximum length L that can be loaded onto the trailer T, and both ends protrude outward from the space formed between the pair of portal frames 12 . Two loading hoists 112 are arranged adjacent to one end of each traversing rail 11, and a chain block 111 is installed at the other end.

The loading hoist 112 is used to load the cut piece P moved by the lifting mechanism 20, which will be described later, onto the transport vehicle C as shown in FIG. Two units are installed. In addition, two chain blocks 111 are installed as auxiliary lifting mechanisms, one for each traversing rail 11, but they are not necessarily provided.

On each of the two traversing rails 11 made of steel having an I-shaped cross section, traversing trolleys 21 of a lifting mechanism 20 run on the rails of the lower flanges.

≪Lifting mechanism≫
As shown in FIGS. 4A and 4B, the lifting mechanism 20 includes a traverse trolley 21 traveling along the lower flange of the traverse rail 11, an orthogonal rail 22 suspended from the traverse trolley 21, and an orthogonal rail 22. An orthogonal trolley 23 running along the rail 22 and a revolving rail 24 supported by the orthogonal trolley 23 are provided.

Two traversing trolleys 21 are provided with an interval from one traversing rail 11 , and a total of four trolleys 21 travel synchronously along the two traversing rails 11 . Two orthogonal rails 22 suspended by these traversing trolleys 21 extend in a direction orthogonal to the traversing rail 11 with a gap therebetween. Two orthogonal trolleys 23 are provided with an interval from one orthogonal rail 22 , and a total of four trolleys synchronously travel along the two orthogonal rails 22 .

The revolving rail 24 is a circular rail supported by four orthogonal trolleys 23, as shown in FIGS. As described above, the four orthogonal trolleys 23 travel along the orthogonal rails 22 suspended by the transverse trolleys 21. Therefore, the plan view position of the revolving rails 24 with respect to the telescopic frame mechanism 10 is as shown in FIG. It can be adjusted by moving in the extending direction of the transverse rail 11 and the extending direction of the orthogonal rail 22 .

The lifting mechanism 20 further comprises a turning trolley 25 running along the turning rail 24 and a lifting hoist 26 provided on the turning trolley 25 .

As shown in FIG. 5 , four rotating trolleys 25 are installed at intervals of 45 degrees with respect to the rotating rail 24 in a plan view, and adjacent rotating trolleys 25 are connected via connecting members 251 . As a result, the turning trolley 25 always travels on the turning rail 24 while maintaining an interval of 45 degrees.

As shown in FIGS. 4A and 4B, the lifting hoist 26 is installed on each of the four turning trolleys 25, so that a total of four hoists 26 are installed on the lifting mechanism 20. FIG. The lifting hoist 26 can be used to lift heavy objects, but in the present embodiment, as shown in FIG. A cut piece P of the existing floor slab cut on the road bridge B is removed from the main girder D via a removing device 30. - 特許庁

≪Floor slab removal device≫
The floor slab removal device 30 is a device for peeling off the cut piece P from the main girder D of the road bridge B, and as shown in FIGS. , a load anchor member 34 installed on the frame 33, a reaction jack 35, and a lifting jig 36.

Both the vertical member 31 and the horizontal member 32 are formed of a long steel member formed by forming a pair of channel steels as one set, and the webs of the channel steel are placed back-to-back with a gap therebetween so that the center of the long steel member A gap parallel to the axis is formed in the portion.

As shown in FIG. 6(a), the frame 33 has a pair of horizontal members 32 spaced apart from each other, and a pair of vertical members 31 spaced apart from each other on the upper surface of the horizontal members 32. formed. At this time, both the vertical member 31 and the horizontal member 32 are arranged in a posture in which the gap between the long steel members penetrates in the vertical direction.

The suspended load anchor members 34 are arranged at each of four locations where the horizontal member 32 and the vertical member 31 of the frame 33 overlap each other, and as shown in FIG. , the head is fixed to the upper surface of the vertical member 31 with a head nut 343 via an anchor plate 342 . Further, the tip of the anchor rod 341 passes through the cut piece P and is fixed to the lower surface thereof with a tip nut 344 . As a result, the cut piece P can be connected to the frame 33 via the anchor member 34 for suspended load.

As shown in FIG. 6(a), the reaction jacks 35 are arranged at both ends of the horizontal member 32, which are the four corners of the frame 33. As shown in FIG. 6(c), the piston rods 351 of the hydraulic jacks The cylinder 352 is installed inside the horizontal member 32 in such a manner that the .

Here, as shown in FIGS. 6(b) and 6(c), the horizontal member 32 of the frame 33 is provided with notches 331 on the lower surface near both ends where the piston rods 351 of the reaction jacks 35 are arranged. The pressing surface of the piston rod 351 does not protrude from the lower surface of the frame 33 when the reaction jack 35 is shortened to the maximum.

Therefore, as shown in FIG. 6B, the frame 33 can be stacked on the upper surface of the cut piece P without being hindered by the piston rod 351 of the reaction jack 35 . In this state, when the cut piece P and the frame 33 are connected and the reaction jack 35 is extended, the piston rod 351 presses the periphery of the cut piece P to be removed.

As a result, as shown in FIG. 6(c), the frame 33 rises while peeling off the cut piece P, the lower surface of which is fixed to the main girder D of the road bridge B, from the main girder D. As shown in FIG. Thus, the cut piece P can be removed from the main girder D of the road bridge B.

Since the lifting jig 36 is installed on the upper surface of the frame 33 , the floor slab removing device 30 is lifted together with the cut piece P by the lifting hoist 26 via the lifting jig 36 .

As shown in FIG. 3, the heavy object moving apparatus 100 configured as described above has a truss structure 16 on the side surface of the telescopic frame mechanism 10, that is, the surface surrounded by the connection truss 15 and the struts 13 connected by the connection truss 15. It is adopted and reinforced, and a side panel 17 is installed. The side panel 17 functions as a protector for the work area provided in the inner space of the telescopic frame mechanism 10 .

Therefore, when removing and moving the cut piece P of the existing floor slab from the main girder D in the bridge floor slab replacement construction method, the work inside the telescopic frame mechanism 10 can be performed while allowing general vehicles to pass on the side of the heavy object moving device 100. It is possible to progress the work in the area. Since both the truss structure 16 and the side panel 17 are provided within the height range of the cylinder 131 of the column 13, they do not hinder the extension or contraction of the column 13.

In addition, as shown in FIG. 1, the side panel 17 has either the driver's side or the passenger's side when placed on the trailer 7, and is installed over the entire height range of the cylinder 131, and the other is installed at the lower end. A notch 171 may be provided on the side. This is suitable when applied to a half section floor slab replacement method in which each half section is replaced rather than a method in which the existing floor slab is replaced on the entire surface (entire cross section).

In the half-section floor slab replacement method, for example, lane regulation is performed on a two-lane highway bridge B having an overtaking lane and a driving lane, and either the half-section portion, that is, the driving lane side or the overtaking lane side of the concrete floor slab 202 is replaced. It is a method of replacing with a new floor slab, and before or after this, the half section on the other side is similarly replaced with a new floor slab.

When applied to such a half-section floor slab replacement method, as shown in FIG. By using the notch 171 of the side panel 17, it is possible to take it into the work area set in the inner space of the telescopic frame mechanism 10 and perform the removal work.

On the other hand, on the side where the side panel 17 is provided over the entire height range of the cylinder 131, it is possible to suppress the phenomenon that the equipment or the cut piece P jumps out of the work area due to unforeseen circumstances. Therefore, by using the side panel 17 provided with the notch 171, while removing the cut piece P in the work area in the telescopic frame mechanism 10, the side panel 17 provided over the entire height range of the cylinder 131 can be removed. public vehicles can be safely used outside the

<<<Method for moving heavy object using heavy object moving device>>>>
The heavy object moving method using the heavy object moving device 100 described above is the half section floor slab replacement method of the bridge described above, when the cut piece P of the existing floor slab is removed from the main girder D and moved, and at the construction site. The procedure for arranging the new floor slab N temporarily placed inside the cut piece P on the site where the cut piece P was removed will be described below. As shown in FIG. 7(a), the cut piece P, which is a heavy object, is cut in advance to a size that can be loaded on the loading platform of the transport vehicle C while being installed on the main girder D of the road bridge B. ing.

<<When removing and moving the cut piece P of the existing floor slab and carrying it out from the construction site>>
First, as shown in FIG. 1, without dismantling the heavy object moving device 100, the struts 13 and the connecting beams 14 of the gate frame 12 are loaded on the trailer T in the shortest state, and then placed on the road bridge B. Transport to construction site.

Next, as shown in FIG. 7(a), with the transverse rail 11 provided on the telescopic frame mechanism 10 directed in the direction of the bridge axis of the road bridge B, the heavy object is moved to a position straddling the cut piece P to be removed. The trailer T loaded with the device 100 is stopped. Then, the struts 13 and connecting beams 14 of the gate-shaped frame 12 are extended as appropriate, the telescopic frame mechanism 10 of the heavy object moving device 100 is developed to a desired size, and installed at a predetermined position on the road bridge B. , the trailer T moves away. Before, after, or at the same time as this work, the floor slab removing device 30 is installed on the lifting hoist 26 of the lifting mechanism 20 .

After that, the traverse trolley 21 is caused to travel along the traverse rail 11 to move the lifting mechanism 20 in the direction of the bridge axis. 20 is further moved in the direction perpendicular to the bridge axis, and the floor slab removing device 30 supported by the lifting mechanism 20 is positioned above the cut piece P to be removed.

After the floor slab removing device 30 has been aligned in this way, as shown in FIG. Laminate on top. Then, the cut piece P and the frame 33 of the floor slab removing device 30 are connected using the suspended load anchor member 34 of the floor slab removing device 30 .

An anchor insertion hole (not shown) is provided in advance in the cut piece P, and as shown in FIG. It is fixed to the lower surface of piece P with tip nut 334 . On the other hand, the head of the anchor rod 341 is fixed to the upper surface of the frame 33 with the head nut 333 via the anchor plate 342 .

After that, as shown in FIG. 6(c), the reaction jack 35 of the floor slab removing device 30 is extended, and the periphery of the cut piece P is pressed by the lower surface of the piston rod 351, so that the cut piece P is removed from the frame 33. and the cut piece P is completely torn off from the main girder. In this state, the frame 33 to which the cut piece P is connected is raised to a predetermined height via the lifting hoist 26 of the lifting mechanism 20 .

In this embodiment, since the length of the cut piece P in the direction perpendicular to the bridge axis is cut longer than the bridge axis direction, as shown in FIG. The floor slab removing device 30 and the cut piece P are moved along the revolving rail 24, rotated by 90 degrees, and changed to a loading position on the loading platform of the transport vehicle C. - 特許庁

The cut piece P and the floor slab removing device 30 in this posture are moved in the bridge axis direction by running the traversing trolley 21 of the lifting mechanism 20 along the traversing rail 11, and installed at one end of the traversing rail 11. It is placed immediately below the loading hoist 112 that has been loaded.

After removing the suspended load anchor member 34 and releasing the connection between the cut piece P and the frame 33, the traversing trolley 21 of the lifting mechanism 20 is caused to run on the traversing rail 11, and only the floor slab removing device 30 is moved to the telescopic frame mechanism 10. , and the work of removing a new cut piece P using the floor slab removing device 30 is started.

On the other hand, as shown in FIG. 8(b), the placed cut piece P is lifted to a predetermined height via the loading hoist 112, and a loading platform is positioned below the cut piece P in the lifted state. Then, the transport vehicle C is driven in, and the cut piece P is loaded on the loading platform. In this way, the cut piece P that has been removed and moved via the heavy object moving device 100 can be carried out from the road bridge B.

<<When arranging the newly temporarily placed floor slab piece N on the site where the cut piece P was removed and moved>>
After all the cut pieces P have been removed by repeating the above procedure, a new floor slab N is laid on the site where the cut pieces P have been removed on the main girder D.

The new floor slab piece N is carried to the construction site by the transport vehicle C and temporarily placed on the existing floor slab below the loading hoist 112 from the loading hoist 112 from the platform of the transport vehicle C. After removing the floor slab removal device 30 from the lifting hoist 26 of the lifting mechanism 20 , the traversing trolley 21 is caused to travel along the traversing rail 11 to below the loading hoist 112 .

Next, as shown in FIG. 9( a ), the temporarily placed new floor slab N is lifted using the lifting hoist 26 of the lifting mechanism 20 , and the traversing trolley 21 is moved along the traversing rail 11 . , to the work area provided in the inner space of the telescopic frame mechanism 10 . The posture of the new floor slab N when arranging it on the site where the cut piece P was removed is such that the length in the direction perpendicular to the bridge axis is longer than in the direction of the bridge axis. , the direction of the new floor slab N is rotated by 90 degrees, and the posture is changed to the posture when installing it on the upper surface of the main girder D.

Thereafter, as shown in FIG. 5, the traverse trolley 21 is further moved along the traverse rail 11 to move the lifting mechanism 20 in the bridge axis direction. Alternatively, the orthogonal trolley 23 is run along the orthogonal rails 22 to move the lifting mechanism 20 in the direction orthogonal to the bridge axis, and the new floor slab P is positioned at the planned installation position on the main girder D.

After the new floor slab P has been aligned in this way, as shown in FIG. to be placed.

It is preferable that the new floor slab N is previously detachably provided with a fixture that can be attached to the lifting hoist 26 of the lifting mechanism 20 . In addition, the work of removing the cut pieces P and the work of arranging the new floor slabs N are performed after removing all the cut pieces P located in the work area provided in the inner space of the telescopic frame mechanism 10, and then the new floor slabs N are placed. They may be installed sequentially, or the work of removing the cut pieces P and the work of arranging the new floor slabs N may be carried out alternately.

After the above work is completed, the heavy object moving device 100 is carried out from the construction site. Without dismantling the heavy object moving device 100, the struts 13 and the connecting beams 14 of the gate frame 12 are shortened to a size that can be loaded on the trailer T, and then the reduced heavy object moving device 100 is installed. is loaded on the trailer T and carried out from the construction site.

As described above, in the bridge floor slab replacement construction method, if the heavy object moving device 100 is used when removing the cut piece P of the existing floor slab from the main girder D and moving it, a series of steps from removal of the cut piece P to carrying out will be performed. Work can be carried out, and work efficiency can be greatly improved. In addition, since the floor slab removing device 30 can be supported by the lifting mechanism 20 at all times, a temporary storage space for the floor slab removing device 30 is not required, and a wide work area can be secured.

In addition, the heavy object moving apparatus 100 does not need to be assembled or dismantled each time it is carried into and out of the construction site, and the workability can be greatly improved. Furthermore, since one trailer T can be used for loading and unloading, the transportation cost can be reduced compared to the case where multiple trailers T are required, and it is possible to contribute to the shortening of the construction period and the reduction of construction costs. .

In addition, since the portal frame 12 has a structure with two struts, and the telescopic frame mechanism 10 composed of a pair of portal frames 12 has a structure with a total of four struts 13, it can be installed in a small installation space. It is possible to install. When installing the heavy object moving apparatus 100 at a construction site, the telescopic frame mechanism 10 can be expanded by extending the columns 13 and the connecting beams 14 of the gate-shaped frame 12 to a desired length, and the inner side of the work area can be used. It becomes possible to ensure a desired size in the space.

The heavy object moving apparatus of the present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the gist of the present invention.

For example, in the present embodiment, a floor slab removing device 30 is installed in the lifting mechanism 20 of the heavy object moving device 100 to remove the cut piece P from the main girder D, and the floor slab removing device 30 is used to cut the cut piece P. Removed piece P. However, when the cut piece P is in a state that can be removed by simply lifting it, the cut piece P can be removed using the lifting hoist 26 of the lifting mechanism 20 without using the floor slab removing device 30. good.

Moreover, the heavy object to be removed by the heavy object moving device is not limited to cut pieces, and the heavy object moving device can be applied to any heavy object.

Furthermore, the numbers of the traversing rail 11, the orthogonal rail 22, the traversing trolley 21, the orthogonal trolley 23, the revolving trolley 25, and the like are not limited to the numbers described above.

100 Heavy object moving device 10 Telescopic frame mechanism 11 Traversing rail 111 Chain block 112 Loading hoist 12 Portal frame 121 Bracing member 13 Strut 131 Cylinder 132 Piston rod 14 Connecting beam 15 Connecting truss 16 Truss structure 17 Side panel 20 Lifting mechanism 21 Traversing Trolley 22 Orthogonal rail 23 Orthogonal trolley 24 Rotating rail 25 Rotating trolley 251 Connecting member 26 Lifting hoist 30 Floor slab removal device 31 Vertical member 32 Horizontal member 33 Frame 34 Anchor member for suspended load 341 Anchor rod 342 Anchor plate 343 Head nut 344 Tip nut 35 Reaction jack 351 Piston rod 352 Cylinder T Trailer C Transportation vehicle P Cut piece H Handrail B Highway bridge D Main girder N New floor slab piece

Claims (20)

A carrying-in step of loading a part of a floor slab moving device having a first pillar and a second pillar, but not having a floor slab removing device installed, on a trailer and carrying it to a construction site, The distance between the second struts is within the width that allows the trailer to be loaded, and the heights of the first and second struts are adjusted to a height that allows road traffic when the trailer is loaded. , a loading step in which a part of the floor slab moving device is loaded on the trailer;
An installation step for installing a part of the floor slab moving device at a predetermined position, the step of extending the support in the height direction and widening the distance between the first support and the second support. an installation process;
a vacating step of vacating the trailer;
and a step of installing a floor slab removing device in a part of the floor slab moving device after the step of moving the floor slab. A step of cutting the existing floor slab to a size that can be loaded on the platform of a transportation vehicle to form a cut piece;
lifting the cut piece;
a step of driving a transport vehicle so that a loading platform is positioned below the cut piece of the existing floor slab that has been lifted;
2. The floor slab moving method according to claim 1, comprising a step of loading the cut piece on the platform of the transport vehicle. The existing floor slab is an existing floor slab of a road bridge,
The length of the cut piece perpendicular to the bridge axis is longer than the length of the cut piece in the bridge axis direction,
3. The floor slab moving method according to claim 2, comprising a step of rotating the direction of the cut piece by 90 degrees. The floor slab moving method according to claim 2 or 3, wherein in the lifting step, the existing floor slab is lifted while the balustrade provided on one end side of the existing floor slab is still installed. A step of lifting the new floor slab carried in by the transport vehicle;
a step of positioning the lifted new floor slab at a planned installation position;
5. The floor slab moving method according to any one of claims 1 to 4, comprising the step of arranging said new floor slab piece at said planned installation position. The new floor slab is a new floor slab of a road bridge,
The length of the new floor slab in the direction perpendicular to the bridge axis is longer than the length of the new floor slab in the direction of the bridge axis,
6. The floor slab moving method according to claim 5, comprising a step of rotating the direction of said new floor slab piece by 90 degrees. Including the step of regulating part of the highway bridge,
The floor slab moving method according to any one of claims 1 to 6, wherein the construction site is another part of the road bridge. The floor slab moving method according to any one of claims 1 to 7, wherein said floor slab removing device is a device for removing an existing floor slab from a main girder. including restricting some lanes on a highway bridge with multiple lanes;
The floor slab moving method according to any one of claims 1 to 8, wherein said construction site is another part of lanes in said road bridge. A floor slab moving device used to replace an existing floor slab with a new floor slab,
a lifting mechanism capable of holding and rotating the floor slab;
first and second portal frames provided facing each other and connected to each other;
a floor slab removal device installed in the lifting mechanism after being carried to the construction site,
The floor slab moving device, wherein each of the first and second portal frames is extendable in a height direction and has first and second struts facing each other. 11. The floor slab moving device according to claim 10, wherein the interval between said first support and said second support is adjustable. 12. The floor slab moving device according to claim 11, wherein the space between said first support and said second support is adjustable so as to fit within a width that can be loaded on a trailer. 13. The floor slab moving device according to any one of claims 10 to 12, wherein said first and second struts are adjustable in the height direction so that said first and second struts have a height that allows passage on roads when loaded on a trailer. 14. The floor slab moving device according to any one of claims 10 to 13, wherein said first and second columns are extendable in a height direction by hydraulic jacks. 15. The floor slab moving device according to claim 14, wherein each of said first and second struts has a cylinder and a piston rod located below it. The floor slab moving device according to any one of claims 10 to 15, comprising a connecting truss that connects the first and second portal frames. 17. The floor slab moving device according to any one of claims 10 to 16, wherein said floor slab removing device is a device for removing an existing floor slab from a main girder. A portal frame for a floor slab moving device according to any one of claims 10 to 17, which is telescopic in the height direction and has first and second struts facing each other. 19. The portal frame according to claim 18, wherein the spacing between said first strut and said second strut is adjustable. A floor slab removing device for the floor slab moving device according to any one of claims 10 to 17, which is installed in a lifting mechanism after being brought into a construction site.

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