JPH033616Y2 - - 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.

BACKGROUND ART In recent years, with the aging of concrete slabs that form the road surfaces of bridges and the like, the number of repairs to the slabs, that is, replacement work for the slabs, is gradually increasing.

By the way, among bridges, the dead load of the concrete deck slab and steel girder is resisted by the cross section of the steel girder alone, and after the concrete deck slab and the steel girder are integrated, the so-called live load composite structure resists the live load. When replacing girder deck slabs, when the old deck slab is removed and the new deck slab is installed, only the steel girder provides resistance in its cross section near the area where the slab was removed, so if the load for installing the new deck becomes large. , it is naturally expected that the problem of insufficient strength of the steel girder will arise. For this reason, it is difficult to bring in a crane to lift the deck slabs 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 slabs. In cases where it is impossible for crane trucks to enter, the floor slab must be replaced using equipment such as cable cranes and floating cranes, which increases the construction period and cost. There were other problems.

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 local conditions of the bridge, i.e., the location of the bridge, reducing construction time and construction costs. 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 present invention has two parts that are movable on the floor slab along the length of the main girder, and that are arranged parallel to both sides of the floor slab in the width direction to suspend one floor slab. A second truck is provided between the drive wheel of the truck and the first running wheel, and a transport vehicle that reciprocates between the truck and the crane to transport the new and old deck slabs.
A lifting device which is provided with running wheels, supports the first running wheel movably in the vertical direction by support legs, and lifts up the floor slab between the first and second running wheels. It is characterized by having the following.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 4, concrete deck slabs 3 ( A floor slab (hereinafter referred to as a floor slab) is passed over, and two carts 4, which hang the floor slab 3 on top of this floor slab 3,
4 is mounted movably along the length direction of the main girder 2. Moreover, a carrier 6 is mounted on the floor slab 3 for transporting the old and new floor slabs 3 by reciprocating between the carts 4, 4 and the crane 5. In addition,
In FIG. 1, reference numeral 7 indicates a truck.

The trolleys 4, 4 and the transport vehicle 6 will be described in detail below.As shown in FIGS. It has a so-called three-leg structure on which a running wheel 10 is arranged, and each wheel 8, 9, 10 has a supporting leg 11, 12, 13, respectively, as shown in FIG.
It has a six-wheel structure, one on each side of the wheel. In addition, a beam 14 is spanned over the top of each support leg 11, 12, 13, and the support leg 1
A mounting table 15 is disposed below the wheels 1 and 13, that is, between the drive wheel 8 and the second running wheel 10.
Furthermore, between the first running wheel 9 and the second running wheel 10 on the beam 14, two chain blocks 16 and 1 are provided as a lifting device for lifting the floor slab 3.
6 is provided.

On the other hand, support legs 12 supporting the first running wheel 9
is supported vertically rotatably in a plane parallel to the length direction of the beam 14 with the connecting portion with the beam 14 as the base end,
It is designed to be rotated up and down by a raising and lowering device 17. This raising and lowering device 17 consists of support legs 12 and beams 1.
4, intermediate gears 20, 21 and chain 22.
Electric motor 2 that rotates sprocket 19 via
It is composed of 3.

Incidentally, a traveling device 25 for driving each drive wheel 8 is provided on the mounting table 15, respectively. The traveling device 25 mainly includes an electric motor 27 that rotates the drive wheels 8 via a chain 26, and a generator 28 that serves as a power source for the electric motor 27. In addition, the code|symbol 29 shows the operation panel which controls the traveling device 25.

Now, to explain the transport vehicle 6, as shown in FIG. 3, the transport vehicle 6 is composed of two self-propelled transport vehicles 30, 30. It is adapted to be moved by driving wheels 33 and running wheels 34 provided at the lower portions of two support legs 31 and 32, which are lower in height than the support legs No. 4, respectively. In addition, these support legs 3
At the upper end of 1 and 32, there is a stand 3 on which the floor slab 3 is placed.
5 has been constructed. Note that a bottom plate 36 is provided below the support legs 31 and 32, and a drive device 37 for driving the drive wheels 33 is provided on this bottom plate 36. The drive device 37 mainly includes an electric motor 38, a generator 39, and a control panel 40 that controls the electric motor 38, and is configured to transmit the rotation of the electric motor 38 to the drive wheels 33 via a chain 41.

Hereinafter, the operation of the present invention configured as described above will be explained with reference to FIG. 4.

To replace the old floor slab 3 that is stretched over the main girder 2, as shown in Figure 4A, move the carts 4 and 4 parallel to each other, and place the chain over the old floor slab 3 that is to be replaced. Make sure that blocks 16 and 16 are in position. In addition, in order to move these two trolleys 4, 4, the operation panels 29 of the two trolleys are connected by a cab tire cable, and the power source is secured by the generator 28 of one trolley 4. At the same time, the two carriages 4, 4 are moved in conjunction with each other by the operation panel 29 of one of the carriages 4.

Then, as shown in FIG. 4B, the old floor slab 3 is lifted up by the chain block 16, and then, as shown in FIG. is moved and the old floor slab 3 is placed on the transport vehicle 6. When the trolley 4 moves as shown in FIG. 4C, there is a
Naturally, there is a gap only when the floor slab 3 is removed, but since the bogie 4 is supported in the order of the driving wheel 8, the second running wheel 10, and the first running wheel 9 along the length direction of the main girder 2, , even if the second running wheel 10 passes over the gap, the drive wheel 8 and the first running wheel 9 keep the bogie 4
is supported on the floor slab 3, so there is no problem with running.

Next, as shown in FIG. 4D, the carrier 6 carrying the floor slab 3 is moved close to the crane 5 and the new floor slab 3 is placed on it, and then moved again to the trolley 4 and the new floor slab 3 is placed on the trolley 4. The fourth chain block 16
Hang it as shown in Figure E. In addition, when moving the carrier vehicle 6, the support leg 11 of the first running wheel 9 is rotated upward by the undulating device 17 so that the floor slab 3 can pass through.

Then, the trolley 4 with the new floor slab 3 suspended thereon is moved as shown in Figure 4, the old floor slab is removed, and the new floor slab 3 is installed, completing the replacement work for one floor slab. .

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, and the removed floor slab can be easily removed. The slab can be carried close to the crane by a transport vehicle, and the new slab can then be carried back to the trolley and used to remove the old slab before installing the new slab. Even when the crane that lifts the deck slab to the replacement position cannot be accessed, the deck replacement work can be carried out easily, and the equipment for lifting the deck slab can be changed depending on the location where the bridge is to be constructed. Since it is not necessary, it has excellent effects such as being able to reduce the construction period and construction cost.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a schematic side view, Figure 2 is a side view of the trolley and transport vehicle, Figure 3 is a plan view, and Figure 4 is an illustration. Figures 1 through 5 are side views shown to explain the functions. 2... Main girder, 3... Floor slab, 4... Bogie, 6...
Transport vehicle, 8... Drive wheel, 9... First running wheel, 10
...Second running wheel, 11, 12, 13...Support leg,
14...beam, 16...chain block, 17...
...Luffing device, 30...Transportation trolley, 31, 32...
Support leg, 33... drive wheel, 34... running wheel.

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 deck, the floor slab replacement device moves onto the floor slab along the length direction of the main girder. Two trolleys that can be freely mounted and arranged parallel to both sides of the floor slab in the width direction from which a single floor slab is suspended, and the old and new slabs are transported by reciprocating between these trolleys and a crane. and a transport vehicle, the trolley comprising:
A second running wheel is disposed between the drive wheel and the first running wheel, and the first running wheel is supported by support legs so as to be movable in the vertical direction. A floor slab changing device characterized in that a lifting device for lifting a floor slab is provided between two running wheels.