JPS63189577A - Extensible pillar - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a telescoping column provided with, for example, an illumination lamp.

[Conventional technology]

This type of telescopic support has a lighting lamp or speaker installed at the top of the support, and when in use, the support can be extended to adjust the height of the lighting lamp to adjust the illuminated area at a civil engineering work site, or to adjust the height of the speaker. It can be adjusted and used, and when not in use, the support can be retracted and folded for easy carrying.

As this type of support, the one shown in FIG. 3 is known. This consists of an upper tube 4 equipped with pulleys 2 and 3 at the upper and lower ends of the middle tube 1 and a lighting lamp (not shown).
The upper end of the wire rope 5 is fixed to the lower end, the wire rope 5 is passed around the pulleys 3 and 4, and then the base pipe 6
It is rolled up by a winch 8 provided on the base pipe 6 by passing it over a pulley 7 attached to the upper end.

[Problem that the invention seeks to solve]

However, this kind of conventional strut has a structure in which the pulley is installed on the inner wall of the main pipe, so the inner diameter of the main pipe becomes large, and when it is hoisted with a winch, a large load is applied and a large force is required for the hoisting operation. However, it is particularly unsuitable for women and children, and the entire pillar is thick (and the surface area that is exposed to the wind is thick (especially when a strong wind blows), making the pillar easy to fall or move. However, it was extremely inconvenient because it could not be made smaller.

[Means for solving problems]

The present invention solves the above-mentioned problems by providing each tube column constituting the telescopic column with a notch through which a pulley is inserted, and by providing a pulley in the notch of the tube column.

〔Example〕

FIG. 1 shows a cross-sectional view of the telescoping strut of the present invention.

In the figure, reference numeral 10 denotes a first tube column serving as a base tube fixed to a movable cart (not shown), and a first notch 11 is formed in the peripheral wall along the vertical direction. 12 is a winch fixed to the lower end of the first tube column 10, and 13 is a first pulley fixed to the upper end of the first tube column 10.

Reference numeral 14 denotes a second pipe post as a middle pipe which is loosely fitted into the first pipe post 10, and a second notch 15 is formed in the peripheral wall along the vertical direction, and the second pipe is inserted across the second notch 15. A second upper pulley 16 and a second lower pulley 17 are installed at the upper and lower ends of the inner wall of the column 14.
is fixed.

Reference numeral 18 denotes a third pipe post as a middle pipe which is loosely fitted into the second pipe post 14, and a third notch 19 is formed in the peripheral wall along the vertical direction, and the third pipe post 18 is straddled over this third notch 19. Third pipe column 18
A third upper pulley 20 and a third lower pulley 2 are installed at the upper and lower ends of the inner wall of the
1 is fixed. and the second upper and lower pulleys 16.
17 is provided at a position to be inserted into the third notch 19.

Reference numeral 22 denotes a fourth pipe post as an upper pipe which is loosely fitted into the third pipe post 18, and a fourth notch 23 is formed in the peripheral wall in a vertical direction. The third upper, middle and lower pulleys 20 and 21 are located within this ↓-th notch 23. Although not shown, parts such as a mercury light or a speaker can be attached to the upper end of the fourth tube column 22, for example. The wire rope 2t is fixed at one end to the fourth tube column 22, and is fixed to the pond edge 12 via each pulley.

Next, the operation of one embodiment of the present invention will be explained. Wind up the winch 12 and wire lobe 2 as shown in Figure 2.
4 is wound up, and the fourth tube column 22 rises first. At this time, it passes through the pulleys 20.21 and rises by the fourth notch 23.

Thereafter, the third tube column 18 and the second tube column 14 can be pulled up sequentially in the same manner to reach the state shown in FIG. 2.

Note that the notch 11 of the first tube column 10 serving as the base tube does not have to be a vertical notch as long as it has a notch for the wire to pass through.

Further, the pulley 13 of the first tube column 11 may be provided on the inner wall of the first tube column 11 instead of the outer wall thereof.

Furthermore, the winch 12 need not be provided on the first tube column 11, but may be fixed at another location, for example, on a moving truck (not shown).

〔Effect of the invention〕

As described above, according to the present invention, notches are formed in the upper and middle tubes, and pulleys are fixed in correspondence with the notches in the inner wall of the middle tube, so when the upper and middle tubes rise, the cutouts are formed. The inner diameter of the container tube can be made extremely small because the notch and the pulley are loosely fitted together, allowing the tube to be lifted up, making it possible to reduce the weight and make the hoisting operation extremely slow. be.

In addition, the overall weight is light and the size can be reduced, so it has the effect of being able to be moved extremely quickly.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the support column according to the present invention, and FIG.
FIG. 3 is a cross-sectional view of the prop shown in the extended state, and is a simplified diagram of a conventional example. 10...First pipe column 14 as a base pipe.18...Second and third pipe column 22 as a middle pipe...
・Fourth pipe column 24 as upper pipe...Wire rope 16.17.20.21...Pulley Figure 2

Claims (1)

[Claims] At least one tube having a different inner diameter and loosely fitted in the base tube and the base tube in sequence.
It consists of two middle tubes and an upper tube loosely fitted into the middle tubes, and at least a notch is formed along the length of the circumferential wall of the upper tube and each middle tube, and corresponds to the notch in the inner wall of each middle tube. A telescopic column in which a pulley is fixed at a location, and a wire rope with one end fixed to the upper tube is passed around each pulley, and the other end is rolled up to raise the upper tube and the middle tube.