JPH0542563Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of lighting poles installed in sports facilities and the like.

[Conventional technology]

Conventionally, a lighting pole is fixed to the ground and has a floodlight attached to the top of the pole to illuminate the surrounding area from a certain height at night.

[Problems that the invention aims to solve] Conventional lighting poles were fixed on the ground, so even when lighting is not needed, such as during the day, they stick out high and spoil the surrounding scenery.

Furthermore, when replacing or repairing a light bulb, it is necessary to climb to the top of the lighting pole, which is dangerous.

Furthermore, in the event of strong winds or earthquakes, there is a risk of the device shaking or falling.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention makes the entire pole expandable and retractable, as well as tilting it to the side.The concrete structure consists of a plurality of tube columns each having a floodlight attached to the upper end. The lowermost one is installed upright on the ground, and pulleys are provided at the upper and lower ends of the middle pipe pillar, and one end is fixed to the lower pipe pillar. The other ends of the two cables are respectively fixed to the lower part of the upper pipe column via the upper and lower pulleys, and means is provided for pushing up the pipe column in the next position from the lowermost end, Furthermore, the tip of the branch extending from one side of the lower end of the lowermost tube column is pivoted on the ground with a horizontal axis, and the tip of the receiving piece extending from the lower end of the other side also has a protruding tip. It is equipped with a downward-facing hydraulic cylinder with a piston rod that can press against the ground when it is pressed against the ground.

[Effect]

When the tube column next to the lowest end is raised, the upper tube columns also sequentially extend upward via the cables.

Due to the reverse action, the tube columns are successively inserted and shortened.

By activating the hydraulic cylinders on the sides of the lowermost tube column, the entire tube can be tilted horizontally around its lower end or raised upright.

〔Example〕

In the figure, 1 is a lower pipe column with a slightly large diameter and a bottom that stands upright with its lower end in contact with the ground surface GL; 2 is a lower pipe column with a bottom;
A medium-diameter bottomed middle tube column 3 is slidably inserted inside the lower tube column 1, and 3 is a small-diameter upper tube column slidably inserted inside the middle tube column 2; Both have a rectangular cross section and are approximately equal in length.

The lower end of a hydraulic cylinder 4 (an air cylinder may be used) is fixed along the axis of the middle pipe column 2 on the bottom wall 2a, and the lower end of the piston rod 5, which protrudes downward through the bottom wall 2a, is fixed to the bottom wall 2a of the middle pipe column 2. It is pivotally supported by a horizontal pin 7 on a bearing 6 protruding from the bottom wall 1a of the tube column 1.

An upper pulley 8, which partially protrudes into the middle tube column 2, is attached to the rear surface of the upper end of the middle tube column 2, and has a horizontal axis 8a. The lower pulley 9 that protrudes more is the horizontal shaft 9a.
It is installed with

A cable 10 (wire rope or chain) whose one end 10a is fixed to the outer rear surface of the upper end of the lower tube column 1 descends through the rear side and upper side of the upper pulley 8, and the other end 10b is attached to the upper tube column 1. It is fixed to the center of the lower end of the pillar 3.

A cable 11 (wire rope or chain) whose one end 11a is fixed to the inner front surface of the upper end of the lower tube column 1 rises through the front side and lower side of the lower pulley 9, and the other end 11b is attached to the upper tube column 1. It is fixed at the center of the lower end of 3.

A vertical branch 12 facing downward is fixed to the front lower part of the lower pipe column 1, and its front end is connected to the ground surface GL.
A horizontal shaft 1 facing left and right is attached to a bearing 13 fixed to the
It is pivoted with 2a.

A horizontal receiving piece 14 facing rearward is fixed slightly above the lower end of the rear surface of the lower tube column 1.

A floodlight 15 is attached to the upper end of the upper tube column 3.

An operation panel 16 and a hydraulic unit (not shown) are attached to the lower side surface of the lower pipe column 1.

In the state where each pipe column 1, 2, 3 is inserted, the hydraulic unit is operated and the hydraulic cylinder 4
When the inside is pressurized, the piston rod 5 extends and the middle tube column 2 rises.

As the middle tube column 2 rises, the upper tube column 3 further rises as it is guided by the upper pulley 8 and the cable 10 and the lower pulley 9 and the cable 11. Therefore, the total amount of extension is approximately twice the stroke of the piston rod 5.

It goes without saying that the extended state can be shortened by reverse operation. At this time, the upper tube columns are respectively immersed into the lower tube columns.

For repairs, etc., in the shortened state,
4, a hydraulic cylinder 17 is attached downward as shown by the imaginary line, and its piston rod 18 is extended to press against the ground surface.

Thereby, the lower tube column 1 rotates forward around the horizontal axis 12a and becomes horizontal, so that work can be performed easily and safely.

The lower pipe column 1 may be installed not on the ground surface GL but in a vertical hole 19 dug in the ground, as shown in FIG. At this time, on the top surface of the vertical hole 19,
Providing the shutter 20 that can be aligned with the ground surface GL is convenient because there will be no ground protrusion when the pole is shortened.

It is obvious that this can be carried out by using a plurality of middle tube columns that fit into each other and passing a wire rope around the upper ones in the same manner as described above. In this case, the total amount of extension will be approximately equal to the stroke of the piston rod of the hydraulic cylinder minus the number of tube columns by one.

The means for raising the middle tube column 2 may be electrically driven, and FIGS. 4 and 5 show an example thereof.

In Fig. 4, the motor 21 installed on the ground
is guided by the upper and lower pulleys 22 and 23,
An endless cable 2 that moves up and down along the lower pipe column 1
4 (chain or wire rope), a portion 24a of which is locked to a portion of the middle tube column 2.

In Fig. 5, the motor 25 installed on the ground
A nut 27 fixed to the center of the lower end of the middle tube column 2 is screwed onto a vertical threaded rod 26 that can be rotated on the axis of the lower tube column 1.

In any of these cases, other configurations are the same as in the first embodiment, and it will be obvious that they operate in the same manner as in the first embodiment.

[Effect of idea]

When lighting is not required, such as during the day, the poles can be shortened to prevent damage to the surrounding scenery and improve safety against strong winds.

In the shortened state, by laying down the lower pipe column horizontally, maintenance and repair work can be performed easily and safely.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the present invention, Fig. 2 is an enlarged vertical side view, and Fig. 3 is a vertical cross-section schematically showing an example in which the invention can be buried underground when shortened. 4 and 5 are longitudinal sectional side views of main parts showing other examples of means for raising the middle pipe column. DESCRIPTION OF SYMBOLS 1...Lower tube column, 1a...Bottom wall, 2...Middle tube column, 2a...Bottom wall, 3...Upper tube column, 4...Hydraulic cylinder, 5...Piston rod, 6...Bearing,
7... Horizontal pin, 8... Upper pulley, 9... Lower pulley, 10, 11... Cable, 12... Branch piece, 1
3... Bearing, 14... Receiving piece, 15... Floodlight, 1
6...Operation panel, 17...Hydraulic cylinder, 18...
Piston rod, 19... Vertical hole, 20... Shutter, 21... Motor, 22, 23... Pulley, 24... Cable, 25... Motor, 26... Screw rod, 27... Nut.

Claims (1)

[Scope of utility model registration request] A tube column with a floodlight attached to its upper end is fitted into multiple tube columns in sequence, and the lowest one is installed upright on the ground, and pulleys are attached to the upper and lower ends of the intermediate tube columns, respectively. At the same time, one end of the two cables is fixed to the lower pipe column, and the other ends of the two cables are fixed to the lower part of the upper pipe column through the upper and lower pulleys, respectively, and the cables are attached to the next position from the lowest end. In a retractable lighting pole provided with means for pushing up a certain tube column, the tip of a branch extending from one side of the lower end of the lowest tube column is pivoted on the ground with a horizontal axis, and Similarly, a telescoping lighting pole is constructed by attaching a downward fluid pressure cylinder having a piston rod capable of pressing the ground when protruding to the tip of a receiving piece extending from the lower end of the other side.