JPS582283B2 - Scaffolding equipment for erecting suspension bridge cables - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the construction of a suspended scaffold (catwalk) for installing cables of a suspension bridge. This invention relates to a device for safely and quickly erecting a book using a supply cart set on a rope and an erecting cart.

Conventionally, the construction method for constructing the constituent flooring for this type of catwalk was to utilize the own weight of the flooring by assembling the flooring one panel at a time near the top of the main tower onto multiple ropes strung between the main towers. The sliding construction method, in which the bridge is constructed by sliding it sequentially toward the center of the span, is commonly used.

However, in the case of this construction method, for small to medium spans, that is, up to about 700 m, the flooring is allowed to slide under its own weight until about 1/4 of the span.
After that, up to point 172, the slope of the rope becomes slack and the friction between the flooring and the rope makes it difficult to slide due to its own weight, so it is pulled by a hauling rope or winch rope stretched between the main towers to the center point of the span. The construction will be carried out sequentially up to 700
For large spans of 1.2 m or more, it is possible to use the slope of the rope up to the 174th point of the span to allow the floor material to slide under its own weight, but after the 1/4 point, the slope of the rope becomes loose. The traction force of the material is greatly increased.

Therefore, the diameter of the hauling rope or winch rope that pulls the flooring becomes thicker, the mechanical equipment that drives it also becomes larger, and the speed at which the flooring is erected continues to increase as the flooring is assembled panel by panel at the top of the tower. becomes very slow,
Furthermore, there are drawbacks such as the need to correct the position of the flooring material after sliding, and the need to take measures against typhoons since the bolts for attaching the flooring material are loosely tightened until the sliding is completed.

The present invention eliminates the above-mentioned drawbacks, efficiently supplies flooring materials for constructing suspended scaffolding, improves work efficiency, and prevents damage from strong winds. The wheels 6 provided above the supply cart 4 for supplying the scaffold construction flooring material 12 are movably hung on a large number of ropes 3 which are installed in parallel between the ropes, and the flooring material 12 is suspended from the ropes. The wheels 6 provided above the construction trolley 5 to be installed are hung on the rope 3, and the supply trolley 4 and the construction trolley 5 are connected or separated in the longitudinal direction of the rope 3. , the transfer trolley 13 on which the flooring material 12 is placed is transferred to the supply trolley 4 and the erection trolley 5.
A suspension for constructing suspension bridge cables, which is movably mounted on a suspension bridge cable, and is equipped with a clamp mechanism such as clamp jacks 26 and 28 fixed to a rope 3, and a moving mechanism such as a traverse cylinder 30 on the construction trolley 5. This is a scaffold erection device.

Next, an explanation will be given of an apparatus for constructing catwalk flooring using a supply truck and an erection truck according to the present invention. Hang by 6.

The movement of the supply cart 4 and the erection cart 5 to the flooring assembly position is carried out by a driving device 10 connected to a hauling rope 9 stretched endlessly between the anchors 7 and 8 via the main tower tops 1 and 2. The carriage 4 is moved, and the erection carriage 5 is moved at the floor assembly position by a traction machine 11 using the rope 3 as a reaction force.

The traction machine 11 can also be used as a self-propelled traction device on a widely used flexible cable.

The supply truck 4 and the construction truck 5 are supplied with flooring material 12.
A transfer trolley 13 is provided as a device for transferring to the erection trolley 5, and this transfer trolley 13 is supported by a swivel carriage 14. The swivel carriage 14 moves on a support plate 15, and
has one side pin structure 16, and the receiving plate 15 on the supply cart 4 side has 2
It has a tiered structure so that the transfer trolley 13 is housed in the lower receiving plate 17.

Note that the rope 3 can be used both for constructing the floor material and for running the supply truck and the construction truck.

A wire mesh 18 constituting a catwalk floor assembly, a cross beam 19 for pressing it down, a floor material 12 such as fixing bolts 20, and a handrail support 21 are loaded in appropriate quantities on a transfer truck 13 of a supply truck 4 at the top of the main tower 1.

Next, the supply truck 4 and the erection truck 5 are connected and the hauling rope 9 is driven to transport the flooring 12 to the assembly position, and the flooring 12 is transferred from the supply truck 4 to the erection truck 5. The folding ring rope 9 is reversed and returned to the top 1 of the main tower, and when the supply truck 4 arrives at the top 1 of the main tower, a transfer truck 13 is transferred from the supply truck 4 to the temporary flooring 12 installed in the first section of the main tower. Storage area 2
The drawer flooring material 12 is loaded onto the tray 2 and then stored in the supply truck 4 again.

On the construction trolley 5 at the assembly position of the flooring 12, a worker
A piece of wire mesh 18 is attached to the upper surface of the rope 3 from between the ropes 3, and further fixed to the rope 3 with bolts 20 using a cross beam 19 mounted on the construction cart 5, and handrail supports 21 are fixed to both ends of the cross beam 19. .

Next, the construction truck 5 is moved toward the main tower top 1 by a traction machine 11 a predetermined distance (the distance required to install one flooring 12) and then stopped.

A traction machine 11 for moving the construction truck 5 is supported by a large number of rollers 23 on the rope 3, and this traction machine 11 is driven by hydraulic power.

Hydraulic power is fixed to the frame 24 of the construction truck 5 and is supplied to the traction machine 11 through several hoses 25 .

To move the traction machine 11, the clamp jack 26 is pulled in and the rope 3 is grabbed by the rope gripping machine 27, and then the clamp jack 2B is pushed out and the rope gripping machine 29 is released. is moved forward, and then the clamp jack 28 is pulled in and the front rope gripper 31 and the rope 3 are clamped by the rope gripper 29.

The construction truck 5 is moved by pushing out the clamp jack 26, releasing the grabber 27, and retracting the traverse cylinder 30.

The operation is then repeated by similar operations.

Next, a piece of wire mesh 18 is again attached to the upper surface of the rope 3 from the construction truck 5, and then the wire mesh 18 is fixed to the rope 3 with bolts 20 via the cross beams 19, and handrail supports 21 are fixed to both ends of the cross beams 19.

Next, the construction truck 5 is moved a predetermined distance by the traction machine 11 again, and the same operation is repeated until the flooring 12 on the construction truck 5 runs out. After transporting the vehicle to the construction vehicle 5 and connecting the supply vehicle 4 and the construction vehicle 5, the transfer vehicle 13 on the construction vehicle 5 side is pulled and stored on the lower receiving plate 17 of the supply vehicle 4, and then the transfer vehicle 13 is pulled onto the floor of the supply vehicle 4 side. The floor material 12 is supplied to the construction truck 5 by pulling the transfer truck 13 loaded with the flooring material 12 over the receiving plate 15 of the construction truck 5.

After repeating this operation and assembling the flooring 12 up to the vicinity of the main tower top 1, the supply truck 4 and the construction truck 5 are removed. The members 12 are assembled and fixed to complete the construction of the floor assembly.

When carrying out the present invention, the flooring 12 is sequentially assembled between the main tower tops 1 and 2 from one main tower top 1 to the other main tower top 2 using a set of supply carts 4 and erection carts 5. Although it may be fixed, the flooring material 12 may be erected sequentially from the intermediate part between the main tower tops 1 and 2 toward each main tower top 1 and 2 using two sets of supply carts 4 and erection carts 5. If you continue to do so, you can double your assembly efficiency.

Moreover, as a means for moving the supply truck 4 and the construction truck 5, any other arbitrary means may be employed.

In this device, the flooring 12 is sequentially assembled onto the rope 3 at predetermined positions using the construction cart 5, so there is no risk of rubbing damage to the cope 3 compared to the conventional sliding construction method, and the flooring 12 is Erection can be carried out easily, safely and quickly, and since the flooring material 12 does not shift or move on the rope 3, it is possible to omit the trouble of adjusting the position of the flooring material 12 or taking measures against typhoons. Furthermore, since the flooring material 12 is supplied to the erection vehicle 5 by the supply vehicle 4, there is no need to temporarily interrupt the assembly for supplying the flooring material 12, and therefore the construction period for erection of the flooring material 12 can be shortened. There are effects such as being able to do it.

[Brief explanation of the drawings] Figure 1 is a schematic side view showing the state of the flooring material being transported and supplied by the supply truck and the flooring material is installed in the erection truck, Figure 2 is a plan view of the same, and Figure 3 is the top view of the same. A perspective view of the components of the catwalk, FIG. 4 is a side view schematically showing the supply truck and the erection truck, FIG. 5 is a plan view of the same as the above, FIG. 6 is a front view of the same as the above, and FIG. FIG. 8 is a perspective view of the supply truck and erection truck, FIG. 9a is a side view of the end of the receiving plate, and FIG. 9b is a front view of the same. 1 and 2 are main tower sections, 3 is a rope, 4 is a supply truck, 5 is an erection truck, 6 is a wheel, 7 and 8 are anchors, 9 is a hauling rope, 10 is a drive device, 11 is a traction machine, and 12 is a floor Material, 1
3 is a transfer trolley, 14 is a swivel car, 15 is a receiving plate, 16 is a pin structure on one side, 17 is a lower receiving plate, 18 is a wire mesh, 19 is a cross beam,
20 is a bolt, 21 is a handrail post, 23 is a roller, 24 is a frame, 25 is a hose, 26 and 28 are clamp jacks, 27 and 29 are rope grippers, 30 is a traverse cylinder, and 31 is a rope gripper.

Claims (1)

[Claims] 1. A supply truck that supplies flooring material for scaffold construction is movably suspended from a large number of ropes installed in parallel between main tower sections of a suspension bridge, etc., and the flooring material is attached to the ropes. The upper part of the construction trolley to be carried out is suspended from a rope, and the supply trolley is connected to the
A clamp that connects the construction trolley in the longitudinal direction of the rope or connects it in parallel so that it can be separated from the rope, allows the transfer trolley on which flooring material is placed to be movably mounted on the supply trolley and the erection trolley, and fixes it to the rope on the erection trolley. A device for constructing a suspended scaffold for constructing suspension bridge cables, characterized by having a mechanism and a moving mechanism.