JPH0349005Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is a method for attaching items such as antennas that need to be installed at high positions to a steel tower at a low position, and then extending the tower to position it at a high place. Regarding the structure of a telescopic tower that can be constructed.

If communication between a specific area and other areas is interrupted due to a disaster such as an earthquake, or if it is necessary to urgently set up a communication line, it is not necessary to install electric wires for wireless lines that use microwaves, etc. It is effective because it is not.

At this time, it is necessary to install the antenna as high as possible so that the path of the spatial radio waves is not affected by obstacles on the ground. To do this, the tower is made telescoping and the antenna is installed at a low location, and then the tower is extended and set at a higher location.

Such telescoping steel towers are required to be easy to transport and easy to construct and install.

[Conventional technology]

The appearance of such a telescopic tower is shown in the perspective view of FIG. In Fig. 4, the expansion tower has an outer column 2, which is the first stage, fixed to a base 1, an inner column 3, which is the second stage, is fixed to the inner upper part of the outer column 2, and the work is carried out on the upper part of the inner column 3. A stand 4, an antenna 5, etc. are attached.

As for the telescopic structure of the telescopic tower, the one shown in Fig. 5 was considered. That is, a roller 6 is attached horizontally to the inside of the upper part of the outer column 2, and a roller 7 is attached laterally to the outer side of the lower part of the inner column 3.
The rollers 6 of the outer column 2 move up and down along the outside of the inner column 3, and the rollers 7 of the inner column 3 move up and down along the inside of the outer column 2.

When transporting this telescopic tower, the base 1, outer pillar 2, and inner pillar 3 are disassembled and transported individually so that they can be transported by hand to places that cannot be accessed by car, such as up mountains. It is set as. When assembling, first, the lower part of the outer column 2 is rotatably engaged with the base 1 so that the outer column 2 is placed in a lying state. Next, the inner column 3 is inserted laterally inside the outer column 2 which is in the horizontal position. At this time, the roller 6 at the upper end of the outer column is removed, the inner column 3 is inserted, and then the roller 6 is attached. Finally, using a winch, the outer column 2 and the inner column 3 are raised to stand upright, and then the inner column 3 is pulled out using a winch to be in an extended state, centering on the rotatable engagement portion.

[Problem that the invention attempts to solve]

The expansion tower designed as above has the following problems.

Since a gap d is required to provide the rollers 6 and 7 between the outer column 2 and the inner column 3, it is necessary to make the outer column 2 larger, which increases the weight and causes problems when transporting it manually. be.

When inserting the inner pillar 3 into the outer pillar 2 in a lying state, it is necessary to lift it up by the height of the gap d,
The workability is poor and assembly is troublesome.

After inserting the inner column 3, it is difficult to attach the rollers 6 to the outer column 2.

[Means for solving problems]

The purpose of the present invention is to solve the above-mentioned conventional problems, and the means thereof is to provide a telescopic tower in which an inner column is inserted inside an outer column and the inner column can expand and contract in the vertical direction. The outer pillar and inner pillar are formed by multiple poles with a circular cross section that extend in the vertical direction.
A plurality of rollers are provided upwardly and downwardly at the upper end of the outer column and the lower end of the inner column, respectively, so as to face and contact the above-mentioned pole in a radial manner, and the roller at the upper end has a shape that fits into a circle outside the pole. The roller at the lower end has a shape that fits into the rail attached to the inside of the pole, and has a structure characterized by being able to expand and contract by contacting each of them.

[Effect]

According to the above means, the rollers of the outer pillar are directed upward;
Since the rollers on the inner column are installed facing downwards, there is no need for a gap between the outer column and the inner column to install the rollers horizontally, and a minimal gap that does not allow the columns to touch each other is sufficient. It is. Therefore, there is no need to increase the size of the outer pillar, and the height to be lifted when inserting the inner pillar is reduced. Since the rollers of the outer column are attached to the ends, it is easy to attach and detach the rollers.

The rollers are arranged radially, and the outer rollers are in contact with the inner pole in a shape that fits into the outer circle, and the inner rollers are in contact with the outer pole in a shape that fits into the rail attached to the inside of the pole. Because there is
Each pole is held between the inside and outside, supporting the inner pillar stably without rattling, allowing for smooth vertical movement. The addition of the rails prevents the inner rollers from coming into contact with the cross members and diagonal members.

〔Example〕

The structure of the expansion tower according to the present invention will be described in detail by way of embodiments with reference to the drawings.

Figures 1 to 3 show an embodiment of the present invention,
FIG. 4 can be applied to expansion towers. FIG. 1 is a side view of the expansion tower. Both the outer column 2 and the inner column 3 have a square cross section, and the outer column 2 is arranged at four corners and has four poles 8 with a circular cross section (pipe) that do not extend in the vertical direction. The rollers 6 are provided radially and upwardly at each of the four corners of the upper end surface. The inner column 3 is composed of four poles 11 having a circular cross section (pipe) arranged at four corners and extending in the vertical direction, which are connected and fixed to a rigid structure made of a framework and reinforcement by cross members 12 and diagonal members 13, Rollers 7 are provided radially and downwardly at each of the four corners of the lower end surface. These are better illustrated in FIGS. 2 and 3.

Regarding the mounting part of the roller with the above configuration, the second
This will be explained in more detail with reference to FIGS. FIG. 2 shows the upper end portion, and FIG. 3 shows the lower end portion. FIG. 2a is a top view, and FIG. 2b is a side view thereof. FIG. 3a is a view from below, and FIG. 3b is a side view thereof.

The upper roller 6 has a concave arc cross section that fits into the circle of the pole 11, and
The support member 14 is rotatably fitted onto a shaft 15 of a support member 14 that is attached upward to the upper part of the support member 14 . The lower roller 7 has a concave cross section that fits into the rail 16 attached to the pole 8.
The support member 17 is rotatably fitted onto a shaft 18 of a support member 17 that is attached downwardly to the lower part of the support member 17 . The above configuration is similarly provided at each of the four corners.

The upper roller 6 contacts the four corner poles 11 diagonally, and the lower pole 7 contacts the four corner poles 11.
The corner poles 8 are in contact with each other so as to be pushed out diagonally through the rails 16, allowing the inner column 3 to move up and down smoothly. Since the rollers 6 and 7 fit into the pole 11 and the rail 16,
The inner column 2 does not rotate in a horizontal plane around the central axis of the outer column 3. By providing the rails 16, the inner rollers 7 are prevented from coming into contact with the cross members 9, diagonal members 10, etc. of the outer column 3 and are prevented from being hindered by this, thereby enabling smooth rotational movement.

As described above, by attaching the upper end roller upward and the lower end roller downward, it is possible to create the minimum gap between the ball 8 and the pole 11 so that they do not come into contact with each other. ,
Since the dimensions and shape of the outer column 2 need only be made to match this, it can be made lighter than the outer column as considered in FIG. Further, the workability of inserting the inner pillar 3 is also improved.

Support member 17 with rollers 6 during assembly
can be easily attached to the upper end surface of the outer column 8. It is easy to transport and assemble in a disassembled state, and the tower can be constructed quickly in an emergency. The rollers fit into each pole,
In addition, by radially arranging the columns, the columns can be supported firmly and stably with a minimum number of rollers.

In the above embodiment, each of the outer column and the inner column is a combination of four poles, but the present invention is not limited to this shape. Also, the number of stages is 2
The invention is not limited to stages, and can be applied to three or more stages. In this case, among the combinations of two pillars that fit into each other, for example, the first and second rows, the second and third rows, etc., the outer one is considered to be the outer pillar, and the inner one is considered to be the inner pillar. shall be taken as a thing.

[Effect of idea]

As explained above, according to the present invention, it is possible to minimize the size of the outer pillar.

It is easy to insert the inner column.

It is easy to attach the roller to the outer pillar.

Minimum number of rollers required.

The relationship between Laura and Paul is stable and strong.

The addition of rails allows the rollers to run stably.

The various practical effects are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a side view of a telescoping tower according to an embodiment of the present invention;
Fig. 2 is a partially enlarged view showing the roller attachment part of the outer column in Fig. 1, Fig. 3 is a partially enlarged view showing the roller attachment part of the inner column in Fig. 1, and Fig. 4 is an external perspective view of the telescopic tower. , FIG. 5 is a side view of a telescoping tower considered as a prior art related to the present invention. Codes in each figure: 1 is the base, 2 is the outer column, 3 is the inner column, 4 is the workbench, 5 is the antenna, 6, 7 are the rollers, 8, 11 are the poles, 9, 12 are the cross members, 10,
13 is a diagonal member, 14 and 17 are supporting members, 15 and 18
indicates the shaft, and 16 indicates the rail.

Claims (1)

[Scope of utility model registration request] In a telescopic tower in which an inner column is inserted inside an outer column and the inner column can expand and contract in the vertical direction, the outer column and the inner column are formed by a plurality of poles with a circular cross section that extend in the vertical direction, and the upper end of the outer column is and a plurality of rollers are provided upwardly and downwardly at the lower end of the inner column so as to face and contact the pole and radially,
The roller at the upper end has a shape that fits into a circle on the outside of the pole, and the roller at the lower end has a shape that fits into a rail attached to the inside of the pole, so that it can expand and contract by contacting each of them. Telescopic tower structure.