JPH0446439Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a net that is used when assembling or repairing power transmission towers to catch tools, etc. that accidentally fall during work at heights, without letting them fall to the ground. It is something.

(Prior Art) This type of net for steel tower construction has been considered and used in various ways in the past as a means of protecting workers, houses, vehicles, etc. under the tower during assembly or repair from falling tools, etc. However, each has its advantages and disadvantages. In other words, the most commonly used method is to use the main pillar material of the steel tower and attach it to the inside, but this does not take into account the outer circumference of the steel tower and cannot deal with objects falling outside the tower. It was hot. In addition, to accommodate both the outside and inside of the tower, steel pipe scaffolding was constructed outside the tower and nets were stretched inside the scaffolding.

(Problem that the invention aims to solve) However, it is inefficient to set up scaffolding to cover falling objects from outside, and the ground clearance is limited to a position of about 6 m, so falling objects from near the top of the tower It would be necessary to secure a vast area in order to deal with the situation in which a steel tower fell in a parallel pattern, something that would not have been possible with steel towers near urban areas. Therefore, in the present invention, it is assumed that the inside of the steel tower will be stretched using the main column material of the steel tower,
This invention discloses a means for catching fallen objects outside the steel tower.

(Means for Solving the Problems) In the present invention, the arms are attached near the main pillars at the four corners of the steel tower and protrude, and a peripheral rope is stretched between the tips of each arm and the periphery of the surface formed by the outside of the tower. The net is installed on a specified surface of the four outer sides of the tower, and by installing it at each section of the tower, it is installed at an angle of depression of 75° or more from the top of the tower during assembly or repair. It can catch fallen tools.

(Example) At the ends of the leg parts 11 of the steel tower mounting material 1, which is made of square pipe material or the like and formed into a substantially U-shape, mounting parts 12 that grip onto the horizontal material of the steel tower are provided, and at the tip part 13, an arm mounting seat 14 is provided. to protrude. Also, a connecting part 21 is provided, which is made of square pipe material or the like, and whose base part has a width corresponding to the arm mounting seat, and which is rotatably connected, and a protruding arm 2 in the form of a ladder with a closed tip and a ladder arranged in the middle is provided. One end of a fixed stay 22 is rotatably fixed to both sides of the intermediate portion, and the other end is temporarily locked. This fixed stay 2
The other end of 2 corresponds to the stay locking part 15 provided at the center of both legs 11 of the tower mounting material 1, and is used for fixing the angle of connection between the two. The outer ropes 4 and 5 are composed of two types of ropes, and the long outer rope 4 has a hook 41 at one end, the other end is treated to prevent it from coming off, and a metal wheel 422 is attached to the hook 41 side. A rope tensioner 43 is inserted into the locking side, and the rope tensioner 43 is provided with a short rope 7 having a hook at its tip. The short outer circumferential rope 5 is the same as the outer circumferential rope 4 except that two metal wheels are missing, and the other structures are the same. In addition, the net 6 corresponds to the line connecting the adjacent tips of the protruding arms 2 that protrude radially from the main pillar materials at the four corners of the tower when viewed from the tower core, and the side surface of the tower body and the surface formed between the protruding arms 2. It is almost trapezoidal.

To explain the procedure for attaching the net 6 to the outer surface of the steel tower using each of the parts configured above, first, attach the tower mounting material 1 to the horizontal members connected at right angles to both sides of the main pillars at the four corners of the tower. Connected protruding arm 2
Install. The connection between the steel tower mounting material 1 and the protruding arm 2 is made using the arm mounting seat 1 on the tip part 13 of the steel tower mounting material 1.
4, the connecting portion 21 of the base of the protruding arm 2 is fitted and fixed rotatably with bolts and nuts. At this time, one end of the fixed stay 22 is released from temporary locking and is locked to the stay locking portion 15 of the tower attachment material 1, thereby bending both of them into a <-shape and fixing them. The connected state as described above is lifted from the top of the steel tower and fixed to the horizontal member using the band of the attachment part 12 at the tip of the leg 11 of the steel tower mounting material 1. At this time, the ring 23 on the back side of the tip of the protruding arm 2 The hooks of the metal wheel 42 of the net body 3, which are connected and set on the ground by a long outer circumferential rope 4 and a short outer circumferential rope 5 as shown in FIG. 5, are respectively locked. . At this time, the hooks of the metal wheels 42 of the net bodies 3 on the adjacent sides are also locked at the same time. Also, the hooks 41 of the outer ropes 4 and 5
The hook of the mounting rope 7 is secured to a ring 16 provided at the attachment portion 12 at the tip of the leg portion 11 of the tower attachment material 1.

The hanging rope 8 is tied to the ring 24 on the surface of the tip of the protruding arm 2 installed on the tower body as described above, and the other end is temporarily fixed and held on the tower body, and the net body 3
After fixing each of the outer circumferential ropes 4 and 5, the fixing stay 22 is unlatched, the hanging rope 8 is loosened, both protruding arms 2 are expanded to a predetermined angle, and the hanging rope 8 is fixed and held to the tower body at that position. do. Next, the outer ropes 4 and 5 are tensioned using a rope tensioner to spread the net body 3. Thereafter, the corresponding hatch 9 within the U-shaped frame of the steel tower mounting material 1 can be removed using the hook to complete the mounting work.

(Effect of the invention) The installation on the steel tower is completed as described above, but by installing the net of the present invention at each section of the steel tower, it is possible to catch tools that fall at an angle of depression of 75° or more. be. In addition, by installing it in multiple stages like this, the falling distance of falling objects is shortened,
Even a slightly heavy object will no longer break through the net and fall to the ground.

In addition, the proposed net can be installed near the main pillars at the four corners of the tower without the need for scaffolding, and therefore can be installed at high places near the top of the tower. By forming 1 in a substantially U-shape, the main column of the steel tower with step bolts can be raised and lowered by passing through the U-shaped frame, and the movement of workers will not be blocked by the multi-tiered net. ,
It has many effects.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the net of the present embodiment installed on a power transmission tower, Fig. 2 is a diagram of the installation state of the net of the present embodiment, Fig. 3 is a front view of the net of the present embodiment, and Fig. 4 is a plan view of the net of the present embodiment. The figure is a front view of the arm of this embodiment.
FIG. 5 is an enlarged plan view of the net attached to the arm according to the present embodiment. Symbols in the figure: 1... Steel tower mounting material, 11... Leg, 12... Mounting part, 13... Tip, 14...
Arm mounting seat, 15... Stay locking part, 16...
Ring, 2... Projection arm, 21... Connecting portion tee, 2
2... Fixed stay, 23, 24... Ring, 3... Net body, 4... Outer rope, 41... Hook, 4
2... Gold wheel, 43... Rope tensioner, 5... Outer rope, 6... Net, 7... Rope with stand, 8...
...hanging rope.

Claims (1)

[Scope of utility model registration request] Each leg 11 of a substantially U-shaped tower mounting material 1 having a space large enough for a worker to pass through is attached to the horizontal members near both sides of the main pillar material at the four corners of the tower, and the tower is mounted. A protruding arm 2 is fixed to the tip of the material 1 so as to be movable up and down, and the line connecting the tips of the protruding arms 2 that protrude radially in all directions from the tower center and the line between the steel tower and the protruding arms 2 on both sides constitutes 4. An overhang type tower net characterized in that a configuration in which outer ropes 4 and 5 are passed around a predetermined surface and a net 6 is disposed within the outer ropes 4 and 5 is provided at each section of the tower.