JPH036648Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a slab replacement device for replacing concrete slabs installed on the main girder of a bridge or the like.

In recent years, as the concrete slabs that form the road surfaces of bridges and other structures have become obsolete, repairs to the slabs, i.e.,
Work to replace floor slabs is gradually becoming more common.

By the way, among bridges, there is a so-called live load composite structure in which only the steel girder resists the dead load of the concrete deck slab and steel girder in the cross section, and the concrete deck and steel girder resist the live load after they are integrated. When replacing a girder deck, the old deck is removed and a new deck is installed. In the vicinity of the removed deck, only the steel girder provides resistance at its cross section, so if the load of installing the new deck becomes large, the steel It is naturally expected that the problem of insufficient strength of the girders will arise. For this reason, it is difficult to bring in a crane to lift the deck slab to the replacement position on the steel girder, and conventionally, a self-propelled crane that goes directly under or close to the bridge is used to lift the deck slab. In cases where crane trucks cannot enter, the floor slab must be replaced using equipment such as cable cranes and floating cranes, which increases the construction period and cost. There was a problem.

The present invention was proposed based on this background, and its purpose is to easily remove old deck slabs on the main girder, even on bridges where crane trucks cannot enter onto the main girder. After this, the new deck slab can be installed, and it can be used in any bridge location regardless of the bridge's local conditions, i.e., the location of the bridge, reducing the construction period and construction work. The purpose of this invention is to provide a floor slab changing device that can achieve the following goals.

In order to achieve this purpose, the floor slab changing device of the present invention is movably placed on the floor slab along the length direction of the main girder, and arranged parallel to both sides of the floor slab in the width direction. The truck has two carts for suspending a slab of floor slab, and the cart has a second running wheel disposed between the driving wheel and the first running wheel, and a second running wheel between the driving wheel and the second running wheel.
The interval between the running wheels and the interval between the second running wheel and the first running wheel is set to have a distance that can straddle at least one floor slab, and the first running wheel is supported by a support leg. A lifting device is provided between the drive wheels and the second running wheels to support the deck so as to be movable in the vertical direction, and to lift the floor slab, and further,
These carts are provided with lifting supports for lifting the carts with a crane.

When the truck passes through the area where the old floor slab has been removed, two of the wheels mentioned above are always on the floor slab to support the truck so that it can run, and the first running wheel is moved upward. This has the effect of securing work space and improving workability.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 7, an abutment 1
A concrete deck slab 3 (hereinafter referred to as the deck slab) is placed over the steel main girder 2 constructed above, and two carts 4, 4 are used to suspend the deck slab 3 on top of this deck slab 3.
are arranged in parallel on both sides of the floor slab 3 in the width direction, and are movably mounted along the length direction of the main girder 2.

As shown in FIGS. 1 to 4, the truck 4 has a second running wheel 7 disposed between a driving wheel 5 and a first running wheel 6, and these wheels are supported by three supporting legs 8,
The so-called 3 supported by 9 and 10 respectively
Furthermore, each wheel 5, 6, 7 has a support leg 8, 9, as shown in FIGS. 3 and 4.
It has a six-wheel structure, one on each side of the 10. Here, the distance between each wheel 5, 6, 7,
In other words, the distance between the drive wheel 5 and the second running wheel 7 and the distance between the second running wheel 7 and the first running wheel 6 are longer than the length of one floor slab 3, The distance is set so that it can straddle 3. In addition, a beam 11 is spanned over the upper part of each support leg 8, 9, 10, and between the support legs 8, 10, these support legs 8, 10 are connected, and a receiving member for the lifted floor slab is provided. A connecting member 12 is attached. Furthermore, on the beam 11, two chain blocks 13,
13 is between the support legs 8 and 10, that is, the drive wheel 5
and the second running wheel 7.

On the other hand, a platform 14 is provided at the lower part of the support leg 8 that supports the drive wheels 5, and a drive device 15 for driving the two drive wheels 5 is mounted on the platform 14, respectively. One is provided for each drive wheel 5. The drive device 15 mainly includes an electric motor 17 that rotates the drive wheels 5 via a chain 16, and a generator 18 that serves as a power source for the electric motor 17.
Note that the reference numeral 19 indicates this drive device 15.
This is an operation panel that controls the movement of the first running wheel 6 and operates the vertical movement of the first running wheel 6.

As shown in FIGS. 5 and 6, the support leg 9 supporting the first running wheel 6 has a rotating shaft 20 between the bifurcated ends 11a and 11a of the beam 11.
and a cylindrical bush 21 fitted on the outer periphery of the rotating shaft 20 so as to be vertically rotatable, and can be rotated up and down by a retraction device 22. As shown in FIGS. 1 and 2, this retracting device 22 is mainly composed of a hydraulic cylinder 23, which is a support column diagonally spanned between support legs 9 and 10. 24 via an attachment shaft 25 so as to be rotatable. Then, the tip of the actuating piston 23a is
The support leg 9 supporting the running wheel 6 is rotatably supported by a shaft 27 via a bracket 26, so that the support leg 9 can be retracted.

Also, what is indicated by the reference numeral 30 in the figure is a lifting support member (bracket) for hoisting the cart 4 by the crane 31, and by hooking a wire 32 or the like to this bracket 30, the cart 4 can be lifted by the crane 31. I'm starting to be able to do it.

Hereinafter, the operation of the present invention configured as described above will be explained with reference to FIG. 7.

In order to replace the floor slab 3 that is stretched over the main girder 2, as shown in Figure 7 A and B, move the two carts 4 and 4 parallel to each other, and move the old floor slab 3 to be replaced. The chain blocks 13, 13 are positioned above. In addition, before the floor slab 3 is not removed, that is, when there is no gap on the main girder 2 where the floor slab 3 was removed, it is of course possible to move each bogie 4, 4 using each wheel 5, 6, 7. However, as shown in FIG. 7A, the retracting device 22 is activated and the first
It is also possible to keep the running wheels 6 apart from the floor slab 3 and move the trolley 4 using only the driving wheels 5 and the second running wheels 7. In addition, the movement of the two trolleys 4, 4 is carried out using the cab tire cable from the operation panel 19 of the two trolleys.
are connected, and while securing power through the generator 18 of one of the two trolleys 4, the two trolleys 4, Move 4 in conjunction.

When lifting the floor slab 3, the first running wheel 6 is grounded, and the first running wheel 6, the second running wheel 7,
The truck is supported on the floor slab 3 by the wheels of the drive wheels 5. After the floor slab 3 is lifted up by the chain blocks 13, 13 as shown in FIG. 7B, the carts 4, 4 are moved toward the crane 31 as shown in FIG. 7C and D. Furthermore, at this time,
Naturally, a gap is created where the floor slab 3 is removed, but as shown in FIG. 7C, when the second running wheel 7 passes over this gap, is caused by the driving wheel 5 and the first running wheel 6,
Further, as shown in FIG. 7D, when the first running wheel 6 passes over the gap, the driving wheel 5 and the second running wheel 7
As a result, the trolley 4 is supported on the floor slab 3, so there is no problem in running.

Next, once the carts 4, 4 with the floor slab 3 suspended near the crane 31 are moved, the old floor slab 3 is lowered, each of the carts 4, 4 is lifted up by the crane 31, and the new platform to be installed is moved. Each chain block 13 of the trolley 4, 4 is suspended on the floor slab.
Hang the new floor slab at 13. Then, the cart on which the new floor slab 3 is suspended is again moved to the location where the old floor slab was removed, and after removal, the new floor slab 3 is installed, completing the replacement work for one floor slab. When removing the old floor slab 3 or installing the new floor slab 3, if the first running wheel 6 is pulled upwards as shown in Figure 7A, a work space can be secured below it. For example, necessary tools and the like can be placed in advance near the floor slab 3 that is to be replaced next, making it possible to improve workability.

As explained above, according to the floor slab replacement device of the present invention, the old floor slab can be easily removed using two carts placed on the floor slab on the main girder. The floor slab can be carried close to the crane while suspended on the trolley, and the new floor slab can be transported again by the trolley to the point where the old floor slab was removed, and then the new floor slab can be installed. ,
Even in cases where the crane cannot reach the deck replacement equipment on the girder, the deck replacement work can be easily carried out, and the first running wheel can be moved upward when removing and installing the deck. If the bridge is moved to another location, construction efficiency can be improved, and since it can be used regardless of where the bridge is constructed, it has excellent effects such as reducing construction period and construction cost.

[Brief explanation of drawings]

Figures 1 to 7 show an embodiment of the present invention, in which Figure 1 is a schematic side view, Figure 2 is a side view of the truck, Figure 3 is a front view of the truck, and Figure 4 is a schematic side view. A plan view of the trolley, FIG. 5 is a front view of the first running wheel and a support leg that supports this running wheel, and FIG. 6 is a sectional view showing the connection between the support leg that supports the first running wheel and the beam. , FIGS. 7A to 7D are side views shown for explaining the operation. 2... Main girder, 3... Floor slab, 4... Bogie, 5...
Drive wheel, 6...first running wheel, 7...second running wheel,
8,9,10...Support leg, 11...Beam, 13...
Chain block, 14...Platform,
15... Drive device, 19... Operation panel, 22... Retraction device, 30... Lifting support member (bracket), 31... Crane.

Claims (1)

[Scope of utility model registration request] In a floor slab replacement device that removes the old floor slab on the main girder and then installs a new floor slab, the floor slab replacement device moves onto the floor slab along the length direction of the main girder. It has two trolleys that can be freely mounted and arranged parallel to both sides of the floor slab in the width direction to suspend one floor slab, and the trolleys are arranged between the drive wheel and the first running wheel. A second running wheel is provided, and a driving wheel and a second running wheel are provided.
The interval between the running wheels and the interval between the second running wheel and the first running wheel are set to have a distance that can straddle at least one floor slab, and
The running wheels are supported by support legs so as to be movable in the vertical direction, and a lifting device for lifting the floor slab is provided between these drive wheels and the second running wheels. A floor slab replacement device characterized by being provided with a lifting support material for lifting a truck by a crane.