Mast, lighting device, and street light pole
The invention provides a mast comprising a modular, hollow tubular body having cylindrical, outer wall segments with an outer surface and enclosing an axially extending cavity, said tubular body comprising in its cavity a first mast segment arranged in between a base segment and a second mast segment and releasably connected thereto. Each of the base, first and second mast segment has an internal structure for bearing the weight of the mast, the internal structure of the first mast segment comprises in the cavity an axially extending inner cylinder connected via radially extending ribs to outer cylinder portions at a first respectively a second end of the inner cylinder and said ribs axially extending from said first end to said second end. Said inner structure being surrounded by a removably mounted, outer wall segment. The inner cylinder by a core wall of the inner cylinder encloses an axially extending core cavity for enabling cabling to pass through from the cavity in the base segment to the cavity in the second mast segment. In mounted position the first part is connected with the first end of its core wall directly to the base part and with a second end of its core wall to the second mast segment.
1. A mast having a longitudinal axis and comprising:
a modular, hollow tubular body having a circumferential outer wall with an outer surface and enclosing an axially extending cavity, said tubular body comprising in its cavity a first mast segment arranged in between a base segment and a second mast segment and releasably connected thereto,
each of the base, first and second mast segment has a bearing structure for bearing the weight of the mast, at least the first mast segment comprises an internal bearing structure in the cavity an axially extending inner cylinder connected via radially extending ribs to a first outer cylinder portion provided at a first end of the inner cylinder and a second outer cylinder portion provided at a second end of the inner cylinder and said ribs axially extending from said first end to said second end, wherein each of the ribs axially extend to connect the first outer cylinder portion to the second outer cylinder portion,
said internal structure being surrounded by an outer wall segment axially extending from said first end to said second end,
the inner cylinder by a core wall of the inner cylinder encloses an axially extending core cavity for enabling cabling to pass through from the cavity in the base segment to the cavity in the second mast segment, both the first end and the second end of the inner cylinder have an extension shaft,
in mounted position the first mast segment is connected with a first end of its core wall directly to the base part and with a second end of its core wall to the second mast segment,
wherein the inner cylinder, the first outer cylinder portion, the second outer cylinder portion, at least two of the ribs and the outer wall segment of the first mast segment enclose at least one axially extending compartment,
wherein the first mast segment has at the first end and the second end respectively a first and second closing feature each comprising as a sealing portion of a first gasket and a second gasket, which, in mounted position, are pressed between respectively the outer wall segment and a respective extension shaft and the core wall and a respective extension shaft to seal said compartment, and
wherein the extension shaft of both the first end and the second end of the inner cylinder extend beyond the outer wall, in mounted position a respective extension shaft being inserted into an associated cavity of the base segment and of the second mast segment.
2. The mast as claimed in claim 1 , wherein said extension shaft has a length that is at least two times a maximal diameter of said first mast segment.
3. The mast as claimed in claim 1 , wherein the base segment, the first mast segment and the second mast segment have mutually matching shapes and diameters in cross-section.
4. The mast as claimed in claim 3 , wherein in mounted position the outer surface of the outer wall of the base segment, the first mast segment and the second mast segment are flush.
5. The mast as claimed in claim 1 , wherein at least one of the inner cylinder and outer cylinder comprises an end cap having a feature matching to a shape of the first gasket and the second gasket as a sealing portion.
6. The mast as claimed in claim 1 , wherein the internal structure of the first mast segment is an integral, extruded part.
7. The mast as claimed in claim 1 , wherein the first mast segment comprises a plurality of compartments defined by the internal bearing structure and separated by the ribs.
8. The mast as claimed in claim 1 , wherein the compartment accommodates both an electronic component and an associated antenna element facing towards the outer wall segment, said outer wall segment being at least partly made of RF transparent material.
9. The mast as claimed in claim 1 , wherein each compartment comprises a respective antenna element and an antenna window coupled to the antenna element, and wherein at least a portion of the cabling passes through each compartment.
10. The mast as claimed in claim 1 , wherein the mast is a street pole.
11. The mast as claimed in claim 1 , wherein the mast is a street pole light.
12. The mast as claimed in claim 1 , wherein the first mast segment comprises a first end cap coupled to the first outer cylinder and the first end of the inner cylinder and a second end cap coupled to the second outer cylinder and the second end of the inner cylinder.
13. The mast as claimed in claim 12 , comprising:
the first gasket positioned between the first end cap and the first end of the inner cylinder to seal the inner cylinder; and
the second gasket positioned between a ridge surface of the first end cap and an end face of the first outer cylinder to seal at least one end of each compartment.
14. The mast as claimed in claim 13 , comprising:
the first gasket positioned between the second end cap and the second end of the inner cylinder to seal the inner cylinder; and
the second gasket positioned between a ridge surface of the second end cap and an end face of the second outer cylinder to seal at least one end of each compartment.