WO1997008410A1

WO1997008410A1 - Mounting device for replacing tubular metal poles

Info

Publication number: WO1997008410A1
Application number: PCT/SE1996/001047
Authority: WO
Inventors: Lars Folke Eriksson; Sven Gustafsson
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-08-23
Filing date: 1996-08-23
Publication date: 1997-03-06
Anticipated expiration: 1998-02-23
Also published as: SE9502916D0; SE9502916L; SE504375C2

Abstract

Device for mounting a lamppost using the truncated section of an existing tubular pole as mounting base. The material thickness of older tubular metal poles may vary, necessitating time-consuming adjustment and resulting in poor stability. In addition, existing cables and terminals are difficult to install. All of these factors require time-consuming and expensive work. The lamellar cylinder consists of a mounting device (1) with a centre hole for tapered sleeves and bolts. The device may be provided with bolt holes (13) to suit a pole with a baseplate (14). A number of angled flat bars (2) are attached to the mounting plate (1) in a cylindrical configuration. The flat bars (2) are angled (3) at the underside of the mounting device (1) to afford maximum stability. The upper section of each flat bar is provided with a shoulder (4) for seating and installing the bars in the pole base (12). Two externally tapered sleeves (5, 6), each provided with a central hole (7) for cables, are seated inside the lamellar cylinder. The upper tapered sleeve (5) is provided with three holes (8) for free-fitting bolts, while the lower tapered sleeve (6) is provided with threaded holes (9). Three bolts (10) are used to draw the two tapered sleeves (5, 6) together in the lamellar cylinder (11). The lamellar cylinder (11) expands to fit tightly in the existing pole base (12). The three bolts (10) and the outward-angled flat bars (3) afford maximum expansion of the complete lamellar cylinder (11), making the arrangement extremely stable. All components are made of hot-dip galvanised steel.

Description

MOUNTING DEVICE FOR REPLACING TUBULAR METAL POLES

Background to invention

In Sweden, the need to replace corroded tubular metal lampposts by new lampposts, using the existing pole base and without carrying out excavation, is considerable. The number of poles which require to be replaced annually is estimated to be 50,000.

Variations in material thickness and the occurrence of minor deformations in older poles necessitate time-consuming adjustment and result in poor stability. In addition, existing cables and terminals are difficult to reconnect to existing poles without rejointing, requiring time- consuming and expensive work. All work should be feasible regardless of the time of year, while there is also a demand for reusing existing poles. However, this has not been possible to date. Although other methods of removing and reinstalling poles are available, the procedures involved are complicated.

Purpose and main characteristics of invention

The purpose of the invention is to provide a mounting device to enable tubular metal poles to be replaced without problems of adjustment while ensuring satisfactory stability. This aim has been achieved by designing an expanding lamellar cylinder which is inserted in the existing, truncated pole base. Three threaded bolts are used to draw the two tapered sleeves together, thereby pressing the flat bars outward as far as possible in the pole base to achieve maximum grip and stability. Existing cables and terminals can be installed simply through the large centre holes in the two tapered sleeves in the lamellar cylinder. The work can be carried out simply, quickly and securely regardless of the time of year.

- The lamellar cylinder can be removed and reused. - The lamellar cylinder can be installed in an existing, truncated pole base after a damaged section has been cut off. The sleeve is inserted in position and bolted fast, making the pole ready for reuse. - The lamellar cylinder is a simplified method of pole replacement. - The lamellar cylinder is manufactured for all tubular pole sizes and shapes.

Description

The lamellar cylinder enables the existing pole base to be used. No excavation or asphalt breakage, underground jointing of cables or liaison with other service companies is required, while the method is completely independent of the weather and is adaptable to different pole and pole base sizes.

The lamellar cylinder offers a stable and simple method of pole replacement. Detailed description

Figs. 1-3

Fig. 1 Mounting device consisting with attached, angled flat bars arranged in a cylindrical or other configuration.

Fig. 2 Details of lamellar cylinder showing tapered sleeves, bolts and flat bars. Fig. 3 Cross-section of lamellar cylinder showing pole and pole base.

The lamellar cylinder consists of a mounting device (1) with a centre hole for tapered sleeves and bolts. The device may be provided with bolt holes (13) to suit a pole with a baseplate (14) or other arrangement. A number of angled flat bars (2) provided with a chamfer (15) are attached to the mounting plate (1) in a cylindrical or other configuration. The flat bars (2) are angled (3) at the underside of the mounting device (1) to afford maximum stability. The upper section of each flat bar is provided with a shoulder (4) for seating and installing the bars in the pole base (12).

Two externally tapered sleeves (5)(6), each provided with a centre hole (7) for cables, are seated inside the lamellar cylinder. The upper tapered sleeve (5) is provided with three holes (8) for free-fitting bolts, while the lower tapered sleeve (6) is provided with threaded holes (9). Three bolts (10) are used to draw the two tapered sleeves (5)(6) together in the lamellar cylinder (11). The lamellar cylinder (11) expands to fit tightly in the existing pole base (12). The three bolts (10) and the outward-angled flat bars (3) afford maximum expansion of the complete lamellar cylinder (11), making the arrangement extremely stable.

All components are made of hot-dip galvanised steel.

Claims

PATENT CLAIMS

1. Device for mounting a tubular metal pole (14) using the truncated section of an existing pole (12) as base, consisting of a lamellar cylinder (11) which can be inserted in the truncated pole section, in which it can be centred, expanded and tightened securely to support the pole (14), characterised in that a number of outward-angled (3) flat bars (2), each separated by a clearance, are attached to a mounting device (1). Two tapered sleeves (5-6) provided with bolts (10) are seated within the flat bars (2). The parts form a lamellar cylinder which is inserted in the existing pole base (12).

2. Device in accordance with patent claim 1 , characterised in that the centring element is provided with axially aligned flat bars (2) attached to a mounting device (1). The flat bars (2) are angled outward (3) at the upper end at the point of attachment to the mounting device, to achieve maximum load-bearing capacity without vibrations or elongation of the material when moments are transmitted to the mounting base.

3. Device in accordance with patent claims 1-2, characterised in that the three bolts draw together the tapered sleeve (6) with threaded holes (9) and the tapered sleeve (5) with holes (8) for free-fitting, whereby each of the flat bars is independently pressed outward as far as possible, in the manner of a friction joint, against the inner wall of the existing pole base (12), which may be deformed and/or may be of a different shape.

4. Device in accordance with patent claims 1-3, characterised in that the upper tapered sleeve (5) is provided with holes (8) for free-fitting bolts and that the lower tapered sleeve (6) is provided with threaded holes. The tapered sleeves may be provided with different tapers.

5. Device in accordance with patent claims 1-4, characterised in that the lower sections of the bolts (10) are threaded to fit threaded holes in the tapered sleeve (6), that the three bolts (10) are tightened to provide a rigid bolted joint, that the bolts are easily accessible for installation and that the bolts are located to the outside of the cable assembly.

6. Device in accordance with patent claim ????, characterised in that the action of the flat bars (2, 3) creates a tapered basket and is used as an assembly element for different tube sizes. The flat bars (2) are cut to the same length.

7. Device in accordance with patent claim 6, characterised in that the flat bars (2) are angled axially downward on the inside, at the shoulder (4), to achieve full expansion along their complete length.

8. Device in accordance with patent claims 1 , 6-7, characterised in that the flat bars (2) are provided with a shoulder (4) for seating the bars when mounting the device in an existing pole base (12).

9. Device in accordance with patent claims 1-8, characterised in that the flat bars (2) are individually attached to a mounting device (1 ), allowing them to expand individually to the maximum extent when the device is expanded.

10. Device in accordance with patent claims 1-9, characterised in that the flat bars (2) are provided with a chamfer (15) at the lower end to permit the tapered sleeve (6) to be seated inside the flat bars (2), that is in the lamellar cylinder (11).

11. Device in accordance with patent claims 1-10, characterised in that the flat bars (2, 11) are free to move inward when inserted, if the pole base is subject to variations in dimensions.

12. Device in accordance with patent claims 1 , 3-5, 10-11 , characterised in that each of the tapered sleeves (5-6) is provided with a centre hole (7) for electrical cabling.

13. Device in accordance with patent claims 1-12, characterised in that the upper tapered sleeve (5) transmits the radial force between the lamellar cylinder (11) and the existing pole base (12).

14. Device in accordance with patent claims 1-13, characterised in that the lower tapered sleeve (6) transmits the radial force between the lamellar cylinder (11) and the existing pole base (12).