JPH025216B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction method for constructing a floor assembly with a handrail device for a catwalk or other suspension scaffold used for constructing a suspension bridge.

A general construction method for a conventional suspended scaffold for work called a cat walk will be explained below with reference to FIGS. 1 to 5.

(1) On the work scaffold 10 attached to the main tower 9,
Lift and transport the materials for constructing the suspended scaffold.

(2) At the upper end of a large number of suspended scaffold supporting wire ropes 3 installed in parallel, the length in the scaffold width direction is approximately 4 m, and the length in the scaffold longitudinal direction is approximately 2 m.
A panel-shaped welded wire mesh 11 is placed thereon, and a metal square pipe 12 extending in the width direction of the scaffold is placed at the longitudinal end of the scaffolding of the panel-shaped welded wire mesh 11.
The square pipe 12 and the wire rope 3 are connected by U-shaped bolts and nuts, and handrail supports 7 are fixed to both ends of the square pipe 12.

(3) In this way, the two panel-shaped welded wire meshes 11 are placed on the wire rope 3, and the square pipes 12 and the handrail supports 7 are attached, and the adjacent panel-shaped welded wire meshes 11 are connected with wires (wires), etc. After the connection, a rope 14 let out from a top winch 13 previously attached to the top of the main tower 9 is connected to a support member 15 attached to the panel-shaped welded wire mesh 11 at the front.

Next, after loosening the U-shaped bolt nut,
By relaxing the tension of the rope 14 of the tower top winch 13, each panel-shaped welded wire mesh 11 is slid toward the center of the wire rope 3, and the square pipe 12 with the handrail support 7 is also welded into a panel shape. It is moved together with the wire mesh 11.

Next, at the upper end of the wire rope 3, the other two panel-shaped welded wire meshes 11, the square pipe 12, and the handrail support 7 are attached as described above, and then they are attached again to the center of the wire rope 3 as described above. The panel-like welded wire mesh 11 is erected over the entire span by moving toward the side and repeating the same operation.

In the part where the inclination angle of the wire rope 3 is slack,
Since the panel-shaped welded wire mesh 11 may become difficult to slide due to frictional resistance with the wire rope 3, in this case, the panel-shaped welded wire mesh 11 is pulled toward the center of the wire rope 3 by the rope of a pulling winch.

(4) After each panel-shaped welded wire mesh reaches the predetermined position, fully tighten the U-shaped bolt nuts,
In addition, a handrail rope 6 is erected and fixed across the upper end of each handrail support 7, a side wire mesh 16 is attached across each handrail support 7, and a belt-like net 17 for preventing small items from falling is installed on the top surface of each panel-shaped welded wire mesh 11. The slip prevention step material 1 placed on the belt-like net 17 is laid and fixed.
8 is attached to a panel-shaped welded wire mesh 11.

However, in the case of the conventional erection method, (a) when the wind speed exceeds 10 m/sec, the work in (1) and (2) above becomes dangerous and impossible, and (b) when performing the work in (4) above, (c) The panel-shaped welded wire mesh 11 is in an unstable state due to swinging, and there is no handrail rope and there are insufficient measures to prevent falls, so there is a high risk of workers falling and small items falling. As explained in (3), if the panel-shaped welded wire mesh becomes difficult to slide and is pulled forcibly, the connecting wires etc. will be cut at the joints between the panel-shaped welded wire meshes and the welded wire mesh will be damaged. There is.

The object of the present invention is to provide a construction method for a suspended scaffold floor assembly with a work handrail device that advantageously solves the above-mentioned problems.

Next, the present invention will be explained in detail using illustrated examples.

Figures 6 to 11 show an example of manufacturing the coiled floor assembly 2 used in the present invention. , pre-rolled welded wire mesh with large mesh and high rigidity (wire diameter approximately 5 mm, mesh size 50 mm)
x 75 mm) are developed, and the widthwise edges of each strip wire mesh 19' are overlapped, and as shown in FIGS. 7 and 8, each strip wire mesh 19' The overlapping parts of are connected by a steel connecting coil 20, and the wire mesh 19
is configured.

Next, as shown in FIG. 9, a belt-shaped net 17 for preventing falling of small objects with a fine mesh made of a fiber net such as a synthetic fiber net or a hexagonal wire mesh is placed on top of the wire mesh 19 of the main body of the belt-shaped floor assembly. wire (wire)
As shown in FIG. 10, a large number of wooden step members 2 for preventing slipping are placed on top of the belt-like net and extending in the width direction of the belt-like net.
1 are arranged at intervals in the longitudinal direction of the belt-like net, and the step members 21 thereof are connected to the wire mesh 19 of the main body of the belt-like floor assembly 19 by connecting members 22 such as wires (wires), thereby forming the belt-like floor assembly 1 for work scaffolding. The strip-shaped floor assembly 1 for a work scaffold is wound to form a coiled floor assembly 2 for a work scaffold as shown in FIG.
When the length of the work scaffolding floor assembly 1 is, for example, 50 m, the outer diameter of the coiled floor assembly 2 wound therewith is approximately 2 m.

Next, an embodiment of the present invention using the coiled floor assembly 2 will be described.

First, as shown in FIGS. 12 and 13, the stand 23 for coil feeding and the winch 24 for supporting the front end of the strip floor assembly are fixed to the support base 4 such as a work scaffold at the top of the main tower 9, and While loosening the rope 25 of the winch 24 connected to the front end of the floor assembly 1, pull the strip floor assembly 1 from the coiled floor assembly 2 set on the stand 23 to the upper end side of the wire rope 3 for supporting suspended scaffolding. At the upper end side of the wire rope 3, a large number of horizontal frame members 5 made of square metal pipes extending in the width direction of the strip floor assembly are placed on the upper surface of the rolled-out strip floor assembly 1, and The horizontal frame members 5 are loosely or slidably attached to the wire rope 3 using U-shaped bolt nuts 26 that penetrate through the band-shaped floor assembly member 1, and handrail supports 7 are fixed to both ends of each horizontal frame member 5 in the front-rear direction. A handrail rope 6 is attached in a slack state to the middle and lower side of each handrail support 7 lined up, and a handrail device 8 is constituted by the horizontal frame material 5, the handrail rope 6, and the handrail support 7, and the band-shaped floor assembly is A rod-shaped connecting member 27 such as a reinforcing bar material is used as a stress transmitting member when pulling the material 1 diagonally downward along the wire rope 3, and both ends of adjacent horizontal frame members 5 are connected to each other via the rod-shaped connecting member 27. Connect to.

In this way, a predetermined length of flooring material and handrail device 8
After configuring the first scaffold section 28A of a predetermined length (for example, about 6 m) consisting of
The front end of the scaffolding section 28A is pulled by a rope of a towing winch, and the first scaffolding section 28A is slid forward by a predetermined distance (for example, about 6 m) along the wire rope 3.

Next, as shown in FIG. 14, the second scaffold section 28B of a predetermined length is assembled and configured in the same manner as in the previous case, and then each scaffold section 28A, 28B is slid forward by a predetermined distance, and then the third and subsequent The assembly configuration of the scaffolding sections and the forward sliding of each consecutive scaffolding section,
After repeating this process as many times as necessary to erect the scaffold over the entire span, the U-shaped bolt nuts 26 are fully tightened, and the handrail rope 6 is also attached to the upper end of the handrail post 7, and then each handrail rope is tightened. A tension force is introduced into 6, and a side wire mesh 16 is attached over each handrail support 7. Figures 15 to 17 show the completed suspended scaffold.

As mentioned above, if the band-shaped net 17 for preventing small objects from falling is attached in advance to the upper surface of the band-shaped welded wire mesh, it is possible to prevent small objects from falling during the suspended scaffold floor assembly.

According to this invention, a coiled floor assembly 2, which is formed by winding a band-shaped floor assembly 1 into a coil shape in advance, is attached to a plurality of wire ropes 3 for supporting suspended scaffolding, which are installed in parallel at a high place. The floor assembly 1 is hoisted onto a support base 4, and then the strip floor assembly 1 is unwound from the coiled floor assembly 2 on the support base 4 and placed on the wire rope 3 for supporting suspended scaffolding. It is possible to reduce the amount of work required at high places such as, etc., and the belt-shaped flooring material 1 is unwound from the coiled flooring material 2 installed on the support stand at the top of the tower, etc., where there is less turbulence due to wind force, so the wind speed is 10m/ The belt-like flooring material 1 can be delivered safely even if the workpiece exceeds sec.
Assembling the strip floor assembly 1 can be done on the ground.
Safety and availability can be improved.
In addition, the horizontal frame members 5 of a large number of handrail devices 8, which are made up of a horizontal frame member 5 extending in the width direction of the band-shaped floor assembly material 1 and handrail supports 7 with handrail ropes 6 fixed to both ends thereof, are paid out. The band-shaped floor assembly 1 is placed on the band-shaped floor assembly 1 at intervals, is loosely connected to the hanging scaffold supporting wire rope 3 together with the band-shaped floor assembly 1, and has the handrail device 8 mounted thereon. Since it is slid along the suspended scaffold supporting wire rope 3, the suspended scaffold floor assembly with handrail device can be erected safely and with high efficiency, and furthermore, the strip floor assembly 1 is erected by sliding movement. Since the handrail rope 6 is attached to the handrail support column 7 before the work is carried out, effects such as reducing the risk of the worker falling can be obtained.

[Brief explanation of drawings]

Figure 1 is a side view showing the construction of a conventional suspended scaffold.
Fig. 2 is a plan view showing a part of the scaffold, Fig. 3 is a plan view showing a part of the completed suspended scaffold, Fig. 4 is a side view thereof, and Fig. 5 is an enlarged cross section taken along line A-A in Fig. 4. It is a diagram. Figures 6 to 11 show examples of manufacturing coiled flooring materials. Figure 6 is a perspective view showing two strips of wire mesh laid side by side, and Figure 7 is a perspective view of two strips of wire mesh laid side by side. A perspective view showing the wire mesh of the main body of the belt-shaped floor assembly made of wire mesh, FIG. 8 is a perspective view showing the connecting part of the wire mesh in the wire mesh of the main body of the belt-shaped floor assembly, and FIG. FIG. 10 is a perspective view of a floor assembly for a work scaffold, and FIG. 11 is a perspective view of a coiled floor assembly. 12 to 17 show embodiments of the present invention.
The figure is a side view showing the assembled configuration of the first scaffolding section on the wire rope for supporting scaffolding, FIG. 13 is a plan view showing a part of it, and FIG. 14 shows the assembled configuration of the second scaffolding section. A side view, Fig. 15 is a side view showing a part of a suspended scaffold erected over the entire span, Fig. 16 is an enlarged plan view showing a part of the suspended scaffold, and Fig. 17 is the suspended scaffold. FIG. In the figure, 1 is a band-shaped floor member, 2 is a coiled floor member, 3 is a wire rope for scaffold support, 4 is a support platform, 5 is a horizontal frame member, 6 is a handrail rope, 7 is a handrail support, and 8 is a handrail. Equipment, 9 is the main tower, 16 is the side wire mesh,
17 is a belt-like net for preventing small items from falling; 18 is a step material for preventing slipping; 19 is a wire mesh for the main body of the belt-like floor assembly; 21
2 is a step material, 23 is a stand for coil feeding, 2
Reference numeral 4 indicates a winch for supporting the front end of the band-shaped floor assembly, 26 indicates a U-shaped bolt nut, 28A indicates a first scaffolding section, and 28B indicates a second scaffolding section.

Claims (1)

[Claims] 1. A coiled floor assembly 2 formed by winding a band-shaped floor assembly 1 into a coil shape is suspended on a support stand 4 near the upper end of a plurality of wire ropes 3 for supporting suspended scaffolding installed in parallel at a high place. Then, on the supporting stand 4, the coiled flooring material 2 to the band-shaped flooring material 1 is transported.
A large number of horizontal frame members 5 are paid out and placed on the wire ropes 3 for supporting suspended scaffolding, and are made up of a horizontal frame member 5 extending in the width direction of the band-shaped floor assembly 1, and handrail supports 7 with handrail ropes 6 fixed to both ends thereof. The horizontal frame members 5 of the handrail device 8 are placed at intervals on the rolled-out strip floor assembly 1 and loosely connected together with the strip floor assembly 1 to the wire rope 3 for supporting suspended scaffolding. A method for constructing a suspended scaffold floor assembly with a working handrail device, characterized in that the band-shaped floor assembly 1 on which the handrail device 8 is mounted is slid along a suspended scaffold supporting wire rope 3.