JP2020122359A - Floor slab erection system, additional floor slab installation method, and floor slab removing method - Google Patents

Abstract

To ensure the additional installation (or removal) of a floor slab with stability using a floor slab erection machine 10 and a floor slab carrying truck 30.SOLUTION: A floor slab erection machine 10 includes a movable body 11 that is movable on floor slabs 2A to 2M, and a floor slab weight lifting mechanism 15 that is supported by the movable body 11 and has a suspension point in a front side in the direction of traveling of the movable body 11, so as to move on the installed floor slabs 2A to 2M, thereby installing a floor slab 2N ahead of the floor slab 2M. A floor slab carrying truck 30 is for carrying the floor slab 2N which is additionally installed by the floor slab erection machine 10, and can pass through the passing space of the floor slab erection machine 10 to move from the rear side into the front side of the floor slab erection machine 10 while loading the floor slab 2N.SELECTED DRAWING: Figure 1

Description

The present invention relates to a floor slab erection system and a erection method (extension method and reduction method) of bridges and the like that are arranged in the bridge axis direction to form a road surface. Here, "erection" is a concept including installation (expansion) of a new floor slab and removal (reduction) of an existing floor slab for replacement.

In the conventional slab erection system, a slab erection machine generally moves on the slab to add or remove the slab. That is, the floor slab erection machine moves on the already installed new floor slab, and the new floor slab is installed (added) in front of the moving direction. Alternatively, the floor slab erection machine moves on the existing floor slab before removal, and the existing floor slab behind the moving direction is removed (removed).
Further, in such a conventional slab erection system, a slab carrier is used in combination with a slab erection machine. The slab carrier carries (carries in or out) the slab that the slab erection machine adds or the slab that has been reduced.

As a slab erection machine used in such a conventional slab erection system, for example, a slab erection machine described in Patent Document 1 is known. This is a railless, self-propelled gate-shaped structure that connects gate-shaped frames in the front and rear of the bridge axis, and is provided on the lower surface of the ceiling of the gate-shaped structure so as to be movable in the front-rear and lateral directions. And a hanging device (for example, a chain block) that is used.

The erection work of a new slab made of precast concrete using such a slab erection machine,
(1) Incorporation of a new floor slab in the rear part of the floor slab laying machine, that is, in the state where the long side of the new floor slab is directed in the bridge axis direction by a suspension device positioned at the rear part of the floor slab erection machine, Lifting the new floor slab (2) Transfer of the new floor slab to the erection position by moving the lifting device to the front side (3) Orientation of the new floor slab so that the long side of the new floor slab is oriented in the direction perpendicular to the bridge axis Change (90° rotation)
(4) Then, it is carried out in the process of installation at a predetermined position.

Japanese Patent No. 3901657 (Japanese Patent Laid-Open No. 2004-300689)

However, in the floor slab erection machine described in Patent Document 1, after the floor slab is hoisted from a floor slab carrier or the like by a suspension device at the rear of the floor slab erection machine, the floor slab is installed together with the suspension device. The slab is installed after moving it from the rear of the machine to the front.

For this reason, it is necessary to move the slab in the slab erection machine in a state of being lifted, from the rear part of the slab erection machine to the front for a long distance, and a large-scale moving mechanism of the suspension device is required. As a result, the floor slab erection machine becomes larger.
Moreover, since the floor slab is moved for a long distance in a suspended state, it is difficult to stably install the floor slab when installing the floor slab.
And, these lead to deterioration of work efficiency, leading to an increase in construction work cost and construction period.

In view of such an actual situation, the present invention, in a floor slab erection system using a slab erection machine and a slab dolly, simplifies the slab erection machine and erection work by improving the functionality of the slab dolly. The challenge is to be able to do so.

The slab erection system according to the present invention includes a slab erection machine that moves on the slab to add a slab, and a slab carrier that transports the slab to be added by the slab erection machine. ,
The slab erection machine includes a movable body that is movable on the slab, and a slab lifting mechanism that is supported by the movable body and has a suspension point in front of the moving direction of the movable body,
The floor slab carriage is capable of entering from the rear to the front of the moving body when seen in the moving direction of the moving body with the floor slab loaded.

The slab erection system according to the present invention also includes a slab erection machine that moves on the slab and reduces the slab, and a slab carrier for transporting the slab that the slab erection machine has reduced. And including,
The floor slab installation machine includes a movable body that is movable on the floor slab, and a floor slab lifting mechanism that is supported by the movable body and has a hanging point behind in the moving direction of the movable body,
The floor slab carrier is capable of exiting from the rear of the moving body to the front of the moving body when viewed in the moving direction of the moving body while the floor slab is loaded.

The method of adding a floor slab according to the present invention uses a floor slab erection machine that moves on the slab to add a slab and a floor slab carrier that carries the floor slab added by the slab erection machine. ,
A step of moving the floor slab installation machine rearward from the floor slab extension position, loading the floor slab by the floor slab carrier, and advancing from the rear to the front of the floor slab installation machine;
A step of unloading a slab from the slab carrier by the slab erection machine using a slab lifting mechanism;
A step of leaving the floor slab carrier from the front to the rear of the floor slab installation machine;
A step of unloading and installing the floor slab to be added by the floor slab lifting mechanism at the floor slab erection machine,
including.

A floor slab reduction method according to the present invention includes a floor slab erection machine that moves on the floor slab to reduce the floor slab, and a floor slab carrier that transports the floor slab reduced by the floor slab erection machine. And
A step of unloading and removing the floor slab to be removed by the floor slab lifting mechanism at the floor slab erection machine,
While the slab erection machine moves forward from the slab slab removal position, the slab dolly is empty, and a step of entering from the front of the slab erection machine to the rear,
The slab erection machine unloads the slab to the slab carrier by a slab lifting mechanism,
A step of loading the floor slab with the floor slab and retreating from the rear to the front of the slab erection machine;
including.

According to the present invention, when the floor slab is added, the floor slab carrier is configured to be able to enter from the rear to the front of the slab erection machine with the floor slab being loaded. Can be simplified.
In addition, during the floor slab reduction work, the slab trolley can be exited from the rear to the front of the slab erection machine with the floor slab loaded, simplifying the slab erection work and erection work. Can be planned.

Side view of the entire system during floor slab extension work shown as an embodiment of the present invention Side view of slab erection machine during slab extension work Front view of slab erection machine and slab carrier Floor plan of slab erection machine Side view of slab carrier Floor plan trolley plan view Side view and floor plan of floor slab extension work (1) Side view and floor plan of floor slab extension work (2) Side view and floor plan of floor slab extension work (3) Side view and floor plan of floor slab extension work (4) Side view and floor plan of floor slab extension work (5) Side view and floor plan of floor slab extension work (6) Side view and floor plan of floor slab extension work (7) Side view of the entire system during floor slab reduction work shown as another embodiment Side view of floor slab installation machine during floor slab reduction work

Hereinafter, an embodiment of the present invention will be described mainly by way of an example of floor slab extension work.
FIG. 1 is a side view of the entire system during a floor slab extension work as one embodiment of the present invention, in which a floor slab installation machine 10 and a floor slab carrier 30 are illustrated.

2 is a side view of the floor slab erection machine 10 during the floor slab extension work, FIG. 3 is a front view of the floor slab erection machine 10 and the floor slab carrier 30, and FIG. 4 is a plan view of the floor slab erection machine 10. 5 is a side view of the floor slab carrier 30 and FIG. 6 is a plan view of the floor slab carrier 30.

As shown in FIGS. 1, 2 and 3, the main girder (bridge girder) 1 of the bridge is made of H-shaped steel or the like and extends in the bridge axial direction. As shown in FIG. 3, the main girder 1 also has a four-column structure in this embodiment.

The floor slabs 2 (2A, 2B, 2C,..., 2H,..., 2M) are placed one by one on the main girder 1 in the extending direction of the main girder 1 by the floor slab erection machine 10. They are lined up and installed to form a road surface. Note that the floor slab 2 is described as 2A, 2B, 2C,... In the order of installation.

In FIG. 1 (and FIG. 2), the floor slab extension work proceeds from left to right in the arrow direction. Therefore, on the left side of FIG. 1, there are new floor slabs 2A to 2M already installed on the main girder 1, and new floor slabs 2N to be installed next (new floor slabs for installation suspended by the floor slab erection machine 10) are installed. The slab 2N) will be installed at a position adjacent to the newly installed new floor slab 2M.

Further, the progress direction of the floor slab addition work is the basic movement direction of the floor slab erection machine 10. Therefore, when the slab erection machine 10 moves to the right in FIG. 1, it is called forward, and when it goes to the left, it is called backward. The right side of the slab erection machine 10 in FIG. 1 is the front side, and the left side in FIG. 1 is the rear side.

In the present embodiment, the floor slab 2 (2A, 2B, 2C,...) is made of recast precast concrete, with its short sides along the bridge axis direction and its long sides along the bridge axis perpendicular direction. Install. The short side of the floor slab 2 has a length of 2.5 m, for example, and the long side has a length of 10 m, for example.

Floor slabs 2 (for example, 2L and 2M in FIG. 2) adjacent to each other in the bridge axis direction are installed with a gap (s in FIG. 2) of about 30 to 40 cm. Reinforcing bars (fixing joints; j in FIG. 2) project from the long sides of each floor slab 2 toward this gap. In this gap, after the floor slab 2 is installed, filling concrete (mortar) is placed.

The slab erection machine 10 moves on the installed new slabs 2A to 2M, particularly on the rails 4 laid on the new slabs 2A to 2M in this embodiment via the sleepers 3 made of H-shaped steel or the like. Then, the new floor slab 2N is installed in front of the newly installed new floor slab 2M.

Therefore, the slab erection machine 10 includes a moving body 11 that can move on the slab 2, and a slab lifting mechanism 15 that is supported by the moving body 11 and has a hanging point in front of the moving direction of the moving body 11. including.

The moving body 11 is configured to be separated into a first carriage 12 on the front side in the movement direction and a second carriage 13 on the rear side in the movement direction, and these carriages 12 and 13 are integrally connected by a connecting member (connecting rod and wire) 14. Move.

The slab lifting mechanism 15 is provided on a front end of the girder 17, which is supported by a column 16 standing on the first dolly 12 of the moving body 11 and projects toward the front in the moving direction of the first dolly 12. The hanging device 18 is provided.
The suspension device 18 includes at least a sheave or a wire payout portion, and a power unit such as a winch may not be integrated with the suspension device 18. The hanging device 18 can install the floor slab 2 at a predetermined position by hoisting and receiving the floor slab 2 from the floor slab carrier 30 and hanging the floor slab 2 from above the floor slab installation position.

Here, since the suspension device 18 is supported by the girder 17, and the girder 17 projects to the front in the moving direction of the moving body 11 (first carriage 12 ), the suspension device 18 itself is not moved back and forth, and thus the floor slab transportation is performed. It is possible to lift the floor slab 2 from the carriage 30 and hang it down to the floor slab installation position.

In addition to the suspension device 18 for the floor slab 2, an auxiliary suspension device 19 is provided on the front side of the girder 17. When the sleepers 3 and the rails 4 are installed simultaneously with the installation of the floor slab 2, this auxiliary lifting device 19 can be used for lifting and lowering these.

The first carriage 12 is equipped with a floor slab lifting mechanism 15, while the second carriage 13 is equipped with a counterweight 20.

The counterweight 20 is for canceling the moment due to the load applied to the suspension point of the suspension device 18 which is separated from the support portion (support 16) of the floor slab lifting mechanism 15 in the first carriage 12.

Therefore, the load of the floor slab 2 to be lifted is FW, the distance from the support 16 to the suspension point (length of the girder 17) is L1, and the distance from the support 16 to the counterweight 20 (length of the connecting member 14) is L2. Then, the weight CW of the counterweight 20 is set as follows.
CW×L2≧FW×L1
CW≧FW×(L1/L2)
Therefore, the weight of the counterweight 20 (weight CW) can be reduced by setting L2>>L1.

In the present embodiment, since the first carriage 12 and the second carriage 13 are connected by the connecting member 14, by adjusting the length of the connecting member 14, the distance from the column 16 to the counterweight 20 is set to be long. be able to. Therefore, it is easy to reduce the weight of the counterweight 20. Further, the weight reduction of the counterweight 20 leads to the reduction of the load on the floor slab.

The moving body 11 is also provided with left and right ground contact portions, in the present embodiment, left and right wheels (race wheels) 21, on the floor slab 2 (a pair of left and right rails 4 laid on the floor slab 2 via sleepers 3). There is a space 25, which is supported and between the left and right ground contact parts, and thus between the left and right wheels 21, through which the slab carrier 30 can pass (see FIG. 3).

In the present embodiment, the wheels 21 are provided as the left and right ground contact portions of the moving body 11 for forming the space 25 for passing therethrough under the moving body 11. As a result, the vehicle can travel on the ground contact portion, and the ground contact portion can also serve as the traveling portion. In addition, particularly by using a bearing ring, the position of the space 25 for passage can be stabilized.

Specifically, as shown in FIG. 3, a pair of left and right first trolleys (first wheel holding portions) 12 of the moving body 11 are provided together with a stanchion 16 erected on the first trolley 12. , 16 are rigidly connected by a horizontal connecting member 22 at a relatively high position.
Further, as shown in the plan view of FIG. 4, the girder 17 is provided so as to project forward from the left and right struts 16 and is connected to the tip end side by a horizontal connecting portion 17a. Therefore, the girder 17 has a U-shaped frame shape in a plan view.

The same applies to the second carriage (second wheel holding portion) 13, and a pair of right and left is provided together with the counterweight 20 mounted on the second carriage 13. The columns 23, 23 are provided on the left and right second carriages 13, 13 respectively, and the columns 23, 23 on the left and right are rigidly connected at a relatively high position by a horizontal connecting member 24.
The same applies to the connecting members 14, and a left and right pair are provided.

Therefore, the floor slab carrier 30 can pass below the left and right first carriages 12, 12 and between the left and right second carriages 13, 13 below the horizontal connecting members 22, 24 and the horizontal connecting portion 17a. A space 25 is formed.

Next, the floor slab carrier 30 will be described with reference to FIGS. 1, 3, 5, and 6.
The floor slab carrier 30 transports (carries in) the floor slab 2N to be added by the floor slab erection machine 10, and puts the sleepers 3 on the installed new floor slabs 2A to 2M, particularly on the new floor slabs 2A to 2M. It moves on the pair of right and left rails 5 laid via the rails.
The pair of left and right rails 5 for the slab carrier 30 are laid between the pair of left and right rails 4 for the slab erection machine 10 using the same sleepers 3 as the pair of left and right rails 4 for the slab erection machine 10. To be done.

The slab carrier 30 includes a vehicle body 31 that is long in the bridge axis direction (extending direction of the rails 5 ), wheels (race wheels) 32 that are attached to the lower portion of the vehicle body 31 and roll on the pair of left and right rails 5, Equipped with. The floor slab carrier 30 further includes a turntable 33 on which a floor slab 2 can be loaded and turned on a vehicle body 31.

The turntable 33 includes a circular swivel portion 33a that is supported by the vehicle body 31 and is rotatable in a horizontal plane, and a rectangular floor slab mounting portion 33b that is fixed and supported on the swivel portion 33a.

Therefore, the floor slab carrier 30 is configured such that the turning portion 33 a of the turntable 33 aligns the longitudinal direction of the floor slab mounting portion 33 b with the moving direction of the floor slab carrier 30 so that the floor slab 2 is loaded with the floor slab 2. It can pass through the space 25 of the plate erection machine 10.
The slab carrier 30 also changes the orientation of the floor slab 2 mounted on the floor slab mounting portion 33b by changing the orientation of the floor slab mounting portion 33b by the turning portion 33a of the turntable 33. The longitudinal direction of the floor slab 2 can be set to the direction perpendicular to the bridge axis so that it can be aligned with the direction at the time of installation.

Next, the floor slab extension work using the floor slab erection machine 10 and the floor slab carrier 30 will be described with reference to the process diagrams of FIGS. 7 to 13. 7 to 13, (A) is a side view and (B) is a plan view.

FIG. 7 shows a state in which the floor slab 2M has been installed, and the floor slab erection machine 10 is still in the floor slab addition position when the floor slab 2M is added. The floor slab carrier 30 has just loaded a floor slab to be installed next (a floor slab to be installed next to the front of the floor slab 2M) 2N and has reached the vicinity of the slab erection machine 10. In the floor slab carrier 30, the floor slab 2N for installation is loaded with the floor slab longitudinal direction oriented in the floor slab bridge axis direction.

Next, as shown in FIG. 8, the floor slab erection machine 10 moves rearward from the slab slab extension position, and the slab dolly carrier 30 keeps the floor slab 2N loaded while passing through the floor slab erection machine 10 through the space ( Passing from the rear side to the front side of the floor slab erection machine 10 through 25) in FIG.

Next, as shown in FIG. 9, in the floor slab carrier 30, the turntable 33 (the floor slab mounting portion 33b) is rotated by 90° so that the loaded floor slabs 2N are oriented in the longitudinal direction of the bridge. Change so that the direction is perpendicular to the axis. Therefore, the position where the slab erection machine 10 moves backward in FIG. 10 is a position in front of the slab erection machine 10 where there is a space where the slab carriage 30 can turn the slab 2N by the turntable 33. ..

Next, as shown in FIG. 10, after the slab erection machine 10 has moved forward to the slab reception position, the slab erection machine 10 uses the slab lifting mechanism 15 to unload the slab 2N from the slab carrier 30. To do.
After unloading, the floor slab carrier 30 rotates the turntable 33 (the floor slab mounting portion 33b) 90° to the original position to prepare for exit.

Next, as shown in FIG. 11, while the floor slab carrier 30 is in an empty state, it passes through the space through which the floor slab erection machine 10 passes, and exits from the front of the floor slab erection machine 10 to the rear, The machine 10 moves forward and moves from the floor slab receiving position to the floor slab extension position. The moving distance from the floor slab receiving position of the floor slab erection machine 10 to the floor slab extension position is short.

Next, as shown in FIG. 12, the floor slab erection machine 10 unloads the floor slab 2N to be added by the floor slab lifting mechanism 15, and installs the floor slab 2M adjacent to the front of the installed floor slab 2M. ..
At this time, the floor slab carrier 30 is moving to a place for placing a new floor slab (not shown) in an empty state.

Next, as shown in FIG. 13, a sleeper 3 is installed on the front edge of the floor slab 2N installed this time, supported by the sleeper 3 on the floor slab 2M and the sleeper 3 on the floor slab 2N, and the rail 4 Set up. For these installations, an auxiliary suspension device 19 different from the suspension device 18 of the floor slab lifting mechanism 15 can be used.
The sleepers 3 and the rails 4 installed here may be carried on the floor slab 2N together with the floor slab 2N by the floor slab carrier 30 and may be installed at a predetermined position on the floor slab 2N after the floor slab 2N is installed. ..
The same applies to the rail 5 for the floor slab 30.

In the present embodiment, the sleepers 3 are arranged on the installed floor slab 2, but if the load of the floor slab erection machine 10 is not desired to be applied to the installed new floor slab 2, the installed new floor slab is installed. A sleeper with a leg (bundle) may be installed on the main girder 1 between two and two (gap), and a rail may be laid on the sleeper.

FIG. 13 shows a state in which the floor slab 2N has been installed, and the floor slab erection machine 10 is still at the floor slab extension position when the floor slab 2N is added. The floor slab carrier 30 has just loaded a floor slab to be installed next (a floor slab to be installed next to the front of the floor slab 2N) 20 and has reached the vicinity of the slab erection machine 10. Comparing FIG. 7 and FIG. 13, it can be seen that the floor slab extension work has proceeded for one sheet.

According to the present embodiment, during the work of adding a floor slab, the floor slab carrier 30 advances to the front of the floor slab erection machine 10 on the floor slab installation side of the slab erection machine 10 to expand the floor slab. The plate can be delivered to the slab erection machine 10. Therefore, the moving distance of the floor slab erection machine 10 after receiving the floor slab and before installing the floor slab can be reduced. As a result, the floor slab can be stably installed with a slight movement from the suspended state.

Further, according to the present embodiment, the floor slab carrier 30 equipped with the turntable 33 can be used to change the direction of the floor slab in front of the slab erection machine 10. There is no need to change the orientation of the slab. This also contributes to the stable installation of the floor slab.

Next, the case of performing the floor slab reduction work will be described with reference to FIGS. 14 and 15.
FIG. 14 is a side view of the entire system (floor erection machine 10 and floor slab carrier 30) during floor slab reduction work as another embodiment of the present invention, and FIG. 15 is a floor slab during floor slab reduction work. It is a side view of the erection machine 10.

The floor slab erection machine 10 and the floor slab carrier 30 shown in FIGS. 14 and 15 are the same as those shown in FIGS. 1 and 2 except that the orientation is the same. Only the usage differs between and. Therefore, the same components are designated by the same reference numerals. Further, regarding the floor slab 2, 2A, 2B, 2C,... Are described in the order of removal.

In FIG. 14 (and FIG. 15), the floor slab reduction work proceeds from left to right in the arrow direction. Therefore, when first removing the existing floor slab 2A, the existing floor slabs 2B, 2C, 2D,... Before removal are present on the main girder 1.

The slab erection machine 10 of the present embodiment includes a movable body 11 that can move on the slab, a slab lifting mechanism 15 that is supported by the movable body 11 and has a suspension point behind the moving body 11 in the moving direction of the movable body 11. , The existing floor slabs 2B, 2C, 2D,... Before removal, especially on the rails 4 laid on these floor slabs through the sleepers 3, and the existing floors behind the moving direction Version 2A is removed (removed).

The floor slab carrier 30 of the present embodiment transports (unloads) the floor slab 2A, which has been removed by the floor slab erection machine 10, and in a state in which the floor slab 2A is loaded, a slab through which the floor slab erection machine 10 passes through. It is possible to exit from the rear of the floor slab erection machine 10 to the front through it.

The floor slab reduction work using the floor slab installation machine 10 and the floor slab carrier 30 is generally performed as follows.

(1) The slab erection machine 10 unloads and removes the slab 2A to be removed by the slab lifting mechanism 15 at the slab removal position.
(2) The slab erection machine 10 moves forward from the slab slab reduction position, and the slab carriage 30 moves forward from the slab erection machine 10 to the rear with an empty load.
(3) The slab erection machine 10 uses the slab lifting mechanism 15 to unload the slab 2A onto the slab carrier 30. After this, the floor slab carrier 30 changes the direction of the floor slab 2A by the turntable 33 to prepare for the exit.
(4) The floor slab carrier 30 loads the floor slab and exits from the rear to the front of the slab erection machine 10 to carry out the floor slab 2A that has been reduced.

According to the present embodiment, during the floor slab reduction work, the floor slab carrier 30 can enter to the rear of the slab erection machine 10, which is the slab removal side of the slab erection machine 10. The floor slab removed by the slab erection machine 10 can be stably unloaded to the slab carrier 30. Moreover, the floor slab carrier 30 can exit from the rear of the floor slab erection machine 10 to the front with the floor slab loaded. Therefore, the moving distance of the floor slab erection machine 10 during the floor slab reduction work can be reduced, and the removal work can be simplified.

Further, according to the present embodiment, the floor slab carrier 30 with the turntable 33 can be used to change the direction of the floor slab behind the floor slab erection machine 10. There is no need to change the orientation of the slab. This also contributes to the stable removal of the floor slab.

As described above, not only the floor slab extension work but also the floor slab reduction work can be performed. Therefore, when replacing the floor slab, it is possible to perform the floor slab addition work (installation of the new floor slab) after the floor slab reduction work (removal of the existing floor slab). Further, by preparing two sets of floor slab installation machines and floor slab carriers and arranging them in front of and behind the floor slab replacement location, respectively, the floor slab replacement can be performed in parallel.

It should be noted that the illustrated embodiment is merely an example of the present invention, and the present invention is not limited to what is directly shown by the described embodiment, and various improvements made by those skilled in the art within the scope of the claims. It goes without saying that it includes changes.

1 main girder 2 (2A, 2B, 2C,..., 2M, 2N) floor slab 3 sleepers 4 rails 5 rails 10 floor slab erection machine 11 moving body 12 first truck 13 second truck 14 connecting member 15 floor sill Weight mechanism 16 Struts 17 Girders 17a Horizontal joints 18 Suspension devices 19 Auxiliary suspension devices 20 Counterweights 21 Wheels 22 Horizontal splice members 23 Struts 24 Horizontal splice members 25 Pass-through spaces 30 Floor slab carriers 31 Vehicle bodies 32 Wheels 33 Turntables 33a Turning Part 33b floor plate mounting part

Claims (9)

A slab erection system that includes a slab erection machine that moves on the slab and adds a slab, and a slab carrier that carries the slab that the slab erection machine adds,
The slab erection machine includes a movable body that is movable on the slab, and a slab lifting mechanism that is supported by the movable body and has a suspension point in front of the moving direction of the movable body,
The floor slab erection system, wherein the floor slab carrier is capable of entering from the rear side to the front side of the moving body when seen in the moving direction of the moving body while the floor slab is loaded. A slab erection system including a slab erection machine that moves on the slab and removes the slab, and a slab carrier that conveys the slab that the slab erection machine has reduced. ,
The floor slab installation machine includes a movable body that is movable on the floor slab, and a floor slab lifting mechanism that is supported by the movable body and has a hanging point behind in the moving direction of the movable body,
The floor slab installation system, wherein the floor slab carrier is capable of exiting from the rear of the moving body to the front of the moving body when viewed in the moving direction of the moving body with the floor slab loaded. The floor slab according to claim 1 or 2, wherein the movable body is supported on the floor slab by the left and right ground contact portions, and has a space between the left and right ground contact portions through which the floor slab carriage can pass. Erection system. The floor slab installation system according to claim 3, wherein the ground contact portion includes wheels. The moving body is configured to be separated into a first carriage that supports the floor slab lifting mechanism and a second carriage that is connected to the first carriage via a connecting member,
5. The second carriage is equipped with a counterweight for canceling a moment due to a load applied to the suspension point apart from the supporting portion of the floor slab lifting mechanism in the first carriage, any one of claims 1 to 4. The slab erection system described in 1 above. The floor slab lifting mechanism includes a girder that is supported by a column that is erected on the moving body and that projects to the front or rear in the moving direction of the moving body, and a suspension device that is provided on the tip side of this girder. The floor slab erection system according to any one of claims 1 to 5, which is configured by. The floor slab installation system according to any one of claims 1 to 6, wherein the floor slab carrier has a turntable, and the orientation of the floor slab loaded on the turntable can be changed. A slab extension method using a slab erection machine that moves on a slab and adds a slab, and a slab carrier that transports the slab to be added by the slab erection machine,
A step of moving the floor slab installation machine rearward from the floor slab extension position, loading the floor slab by the floor slab carrier, and advancing from the rear to the front of the floor slab installation machine;
A step of unloading a slab from the slab carrier by the slab erection machine using a slab lifting mechanism;
A step of leaving the floor slab carrier from the front to the rear of the floor slab installation machine;
A step of unloading and installing the floor slab to be added by the floor slab lifting mechanism at the floor slab erection machine,
How to add floor slabs. A floor slab reduction method that uses a floor slab erection machine that moves on the floor slab to reduce the floor slab and a floor slab carrier that transports the floor slab reduced by the floor slab erection machine. hand,
A step of unloading and removing the floor slab to be removed by the floor slab lifting mechanism at the floor slab erection machine,
While the slab erection machine moves forward from the slab slab removal position, the slab dolly is empty, and a step of entering from the front of the slab erection machine to the rear,
The slab erection machine unloads the slab to the slab carrier by a slab lifting mechanism,
A step of loading the floor slab with the floor slab and retreating from the rear to the front of the slab erection machine;
Floor slab reduction method, including.