JPH0738583Y2 - Screen development device in steel tower - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> Maintenance, inspection, repair and remodeling, painting, and other work are part of the management of the steel tower after the construction of the steel tower has been carried out. For the purpose of reducing damage to the area near the lower part of the tower due to falling rainwater and falling snow, etc., there is means for surrounding the tower with a screen. It is about.

<Problems of the prior art and device> Conventionally, as a means for surrounding the screen in such a tower body, there is one that covers almost the entire tower body with a screen, but in this case, a large area screen is required, Equipped with sturdy arms designed to hold this large screen, and a strong power source for hoisting the screen has been required (for example, Japanese Patent Application No. 59-104788).
Technology disclosed in the specification of No.).

Depending on the wind direction even if rainwater is scattered or snow is falling, the screen only partially covers the tower body in the work related to the management of the above-mentioned steel tower. In many cases, it is not always necessary to surround the entire tower.

This invention was made in consideration of such circumstances, and depending on the above-mentioned work and the situation of rainfall and snow, the tower body as a whole, or a part, and in some cases, it may be partially replaced with a screen having a different function, etc. It is an object of the present invention to provide a suitable screen developing device that can be performed by

<Means for Solving the Problems> As shown in FIG. 1, the screen developing device for a steel tower is divided into several stages in the height direction, and a screen is provided by surrounding the tower body at each stage. In the steel tower, a guide rail is provided on the upper part of the above-mentioned tower, and a plurality of guide rollers are fitted to the guide rail. The screen is constructed so that it can be expanded by being guided by the guide rails, and as shown in FIG. 4, the guide rails provided in the upper part of each stage are provided by dividing the periphery of the tower into a plurality of parts. And a screen suspended via a guide roller is also configured to be provided by being divided into the number of divisions of the guide rail, which is a means for solving the problem. Of.

<Operation> The screen surrounding the steel tower is divided into several stages in the height direction, and the guide rails are fixed to the steel tower at the top of each step, and the guide rails are fitted with multiple guide rails. Then, the screen is hung on this and unfolded to be used for work etc. (Figs. 1 and 2). At idle time, the screen is reduced to the end of the guide rail and restrained to the tower leg. It is held (FIG. 3, other steps are substantially the same).

<Embodiment> In the screen developing device of the present invention, the screen 2 is divided into several stages in the height direction of the tower body 1 of the steel tower, and the screen 2 is expanded and installed so as to surround the tower body 1 (Fig. 1). ). The screen 2 is commonly suspended in the upper portion of the screen 2 at a plurality of places via the guide roller 3 via the guide roller 3 and is provided so as to be expanded or contracted around the tower body 1 by the guide roller 3. (Figs. 2 and 3).

The guide rails 21 are attached to opposite side members 12 and the like provided for the purpose of reinforcing the tower legs 11 of the tower body 1 through support metal fittings 13, and in some cases, are divided into two and provided so as to surround the tower body 1. (Fig. 4). The guide rail 21 is a prismatic rail, is attached to the tower body 1 with the opening groove 22 on the lower side, and the guide roller 3 is movably fitted to the guide rail 21 (FIG. 5).

The guide roller 3 has two pairs of rollers 32 rotatably attached to the upper part of the step 31, and a through hole at the lower part of the main body 31.
33 is drilled (FIG. 6).

The screen 2 has a plurality of upper portions at the above-mentioned guide roller 3
It is suspended via a connecting rope 34 and is provided so as to be expandable or contractable around the tower body 1 in association with the guide roller 3 running along the guide rail 21.

At the time of the experiment, a polyethylene net with a mesh size of 3 cm to 4 cm was used for the screen 2 to prevent snow damage.
The snowflakes falling from the tower hit the net surface and shredded into pieces, losing the ability to damage the equipment directly below.

Also, naturally, different kinds of nets having different mesh sizes are used depending on the work content, but the unit weight of the net may be bulky depending on the kind, and as shown in FIG. 4, the guide rails 21 surrounding the tower 1 are provided. Therefore, the screen 2 may be divided into two parts, and the screen 2 may be divided into two parts. In particular, the area of the bottommost screen 2 is significantly larger than that of the upper part, so that it may be divided into three or more parts. Sometimes.

In order to reduce the damage in the leeward area, especially in the case of snow protection, the screen deploying device configured as described above deploys the screen 2 on about two surfaces corresponding to the leeward, and avoids deploying it on the entire tower body 1. It is possible to obtain it, and even if it is at the time of painting work, a similar means is taken so that the paint does not splash downwind. Further, in connection of the screen 2 and the guide roller 3, it is possible to replace the connection rope 34 and to quickly replace it with another type of net having a different mesh size by using attachment / detachment metal fittings such as hooks so that detailed work can be performed. is there. The screen 2 is designed to be contracted at the end of the guide rail 21 and restrained and stored in the tower 11 when it is idle.

<Effect of the device> Since the screen deploying device in the steel tower of the present invention has the above-mentioned configuration, it can be used for maintenance inspection, repair and modification, paint work, etc. after construction of the steel tower, and also due to rainwater flowing down or snow falling. The effect of reducing damage to nearby areas as much as possible can be dealt with more finely than in the prior art, that is, the screen can be partially expanded, and the expansion can be done manually. , It can be partially replaced with another type of screen, and it can be easily installed in an existing steel tower, which has many good effects.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a steel tower in which the screen developing device of the present invention is implemented. Fig. 2 also shows the bottom of the steel tower, and is a front view of the state in which the screen is unfolded. Fig. 3 contracts the screen from the state of Fig. 2 to the end of the guide rail and restrains it on the tower legs. Drawing which shows a state, FIG. 4 is explanatory drawing which shows the state in which the guide rail is attached to the tower body. FIG. 5 is an explanatory view showing a guide roller fitted to the guide rail in a sectional view of the rail, and FIG. 6 is a perspective view illustrating the configuration of the guide roller. 1 …… Tower, 21 …… Guide rail 2 …… Screen, 22 …… Opening groove 3 …… Guide roller, 31 …… Main body 11 …… Tower leg, 32 …… Roller 12 …… Vertical material, 33 …… Through hole 13 …… Supporting metal fitting, 34 …… Connecting rope G ・ L …… Ground surface

Claims (2)

[Scope of utility model registration request] 1. An iron tower comprising a plurality of stages divided in the height direction, each of which is provided with a screen surrounding a tower body, and a guide rail is provided at an upper portion of each of the stages, and the guide rail is provided on the guide rail. A plurality of guide rollers are fitted to each other, and the upper part of the screen, which is a net of appropriate size, is hung at a plurality of points on the guide roller, and the screen can be expanded by being guided by the guide rails. A screen development device for a steel tower, which is configured as described above. 2. The guide rails provided at the upper part of each stage are provided by dividing the circumference of the tower body into a plurality of pieces, and the screens hung through the guide rollers are also divided by the number of divisions of the guide rails. Claim (1) which is provided and provided
A screen developing device for a steel tower according to.