[0001] This invention relates to a gutter assembled by interconnecting gutter components.
Such gutters may be used, for example in the valleys between inclined roofs of industrial
buildings.
[0002] According to the present invention, the connection between two gutter components
is made between a connecting element, including a tapped bore, which is bonded to
one end of one of the gutter compontnets and a connecting portion at the adjacent
end of the other gutter component, the connecting portion overlying the connecting
element, and a self-supporting gasket being disposed between the connecting portion
and the connecting element, a bolt extending through an opening in the connecting
portion into the tapped bore to secure the gutter components together.
[0003] The connecting element may be made from glass reinforced plastics (GRP) in which
case the tapped bore may be provided in a threaded metal insert.
[0004] It is becoming increasingly common for the roofs of industrial buildings to be insulated.
In order to extend the insulation to areas of the roof which are provided with gutters,
the gutters themselves have also been insulated. Hitherto, this has been done by securing
sections of insulating board to the underside of the gutter after installation of
the gutter. This is a labour-intensive operation and is not always effective. In addition,
it creates difficulties in replacing damaged gutter sections.
[0005] According to an embodiment in accordance with the present invention the gutter component
comprises an upper skin, of water-impervious material providing a trough for carrying
rainwater, a lower skin, the edge regions of which engage the edge regions of the
upper skin and the central region of which is spaced from the central region of the
upper skin to provide a cavity between the upper and lower skins, and a body of thermally
insulating material disposed within the cavity.
[0006] The upper and lower skins may comprise glass reinforced plastics material (GRP),
and the insulating material may comprise foamed plastics material, such as polyisocyanurate
foam.
[0007] A convenient method of manufacturing a gutter component in accordance with the present
invention begins with laying up the lower skin in a mould by applying a gel coat of
a suitable resin to the surface of the mould. Glass fibre rovings are then sprayed
onto the gel coat. The lower skin thus formed can be removed from the mould for storage
if required. The upper skin may be formed by the so-called "pultrusion" process, in
which the material is pulled through a suitably shaped die under tension.
[0008] When the complete gutter component is to be assembled, the lower skin is fitted into
a mould which is capable of holding the lower skin rigid under pressure. A dosed quantity
of foamable plastics material is deposited on the lower skin, and the upper skin is
then clamped firmly, in sealing engagement, with the lower skin. Within a very short
time, the foamable material begins to foam and expands to fill the cavity provided
between the upper and lower skins. The foamed material bonds together the upper and
lower skins, so that no further bonding is required at the adjoining edges of the
upper and lower skins.
[0009] For a better understanding of the present invention, and to show how it may be carried
into effect, reference will now be made, by way of example, to the accompanying drawings
in which:
Figure 1 shows, in longitudinal cross-section, two interconnected gutter components;
and
Figure 2 is sectional view taken on the line II-II of Figure 1.
[0010] Each gutter component comprises an upper skin 2 which is made from GRP by means of
the "pultrusion" process. Each upper skin 2 incorporates woven glass fibre matting,
and to provide the necessary rigidity and strength there may be, for example, five
layers of this matting.
[0011] To one end of each upper skin 2 is bonded a connecting element 4. This element 4
is shown bonded to the left-hand upper skin 2, but it will be appreciated that a similar
connecting element 4 will be bonded to the right-hand upper skin at the end which
is not visible in Figure 1. The connecting element 4 comprises a rib 6 from which
extend two flanges 8 and 10, the flange 8 being bonded to the upper skin 2.
[0012] A lower skin 12 adjoins the upper skin 2 at its lateral edges. At one end, the lower
skin 12 adjoins the flange 10 of the connecting element 4, and at the other end the
lower skin 12 adjoins the upper skin 2 at a position spaced from the end of the upper
skin 2, so that a portion of the upper skin 2 projects beyond the lower skin 12. The
upper skin (including the connecting element 4) and the lower skin provide a cavity
14 which is filled with a polyisocyanurate foam. The thickness of this cavity (i.e.
the distance between the upper skin 2 and the lower skin 12) is selected to provide
the desired degree of thermal insulation as governed by current building practice
and/or regulations. At present, it is thought that a thickness of approximately 25
mm is sufficient for most purposes.
[0013] The lower skin is made from GRP by laying up in the conventional manner in a suitably
shaped mould. A gel coat is applied to the surface of the mould, and glass fibre rovings
are sprayed on to the gel coat.
[0014] The connecting element 4 is made from GRP in a hot press moulding process. A row
of holes is provided across the width of the flange 10, and a threaded insert 16 is
force-fitted into each hole. Each insert 16 may have a serrated cylindrical surface
in order to retain it against rotation in its hole. Between the upper skin 2 of the
right-hand gutter section and the flange 10 there is a self-supporting gasket 18 which
is bonded to the flange 10. This gasket 18 can, for example, be made from paper or
board, as is commonly used for gaskets in automobile engines, or it may be made from-hard
rubber or other resilient materials. In the preferred construction, the upper skin
2 and the connecting element 4 can be formed with great accuracy, and so the gasket
18 does not have to be excessively resilient. In particular, the use of flowable sealants
such as mastic can be avoided. The gasket 18 has, at each end, an upturned lip 20
which increases the pressure between the upper skin 2 and the flange 10 to improve
the seal between these parts.
[0015] The two gutter components are secured together by bolts 22 which pass through holes
drilled in the upper skin 2, through pre-punched holes in the gasket 18, and into
the inserts 16. A rigid and water tight joint can thus be obtained, and it will be
noted that the upper surfaces of the upper skins 2 and of the rib 6 are flush with
one another.
[0016] The Figures and the description given above relate to gutter components which are
both thernally insulated and interconnected by the connecting element 4. However,
it will be appreciated that the connecting element 4 can be used to interconnect gutter
components which are not thermally insulated and which comprise, for example, only
the upper skin 2. Similarly, thermally insulated.gutter components can be interconnected
by means other than the connecting element 4.
1. In a gutter, a connection between two gutter components, characterized in that
the connection is made between a connecting element (4), including a tapped bore,
which is bonded to one end of one of the gutter components and a connecting portion
at the adjacent end of the other gutter component, the connecting portion overlying
the connecting element (4), and a self supporting gasket (18) being disposed between
the connecting portion and the connecting element (4), a bolt (22) extending through
an opening in the connecting portion into the tapped bore to secure the gutter components
together.
2. A connection in a gutter as claimed in claim 1, characterized in that the connecting
element (4) is made from glass reinforced plastics material.
3. A connection in a gutter as claimed in claim 1 or 2, characterized in that the
tapped bore is provided by a threaded metal insert (16) in the connecting element
(4).
4. A connection in a gutter as claimed in any one of the preceding claims, characterized
in that the connecting element (4) has a rib (6) which extends between the adjacent
end edges of the gutter components, or of the upper skins (2) of the gutter components,
the upper surface of the rib (6) being flush with the upper surface of each of the
gutter components.
5. A-.connection in a gutter as claimed in claim 4, characterized in that two flanges
(8, 10) extend from the rib (6), one of the flanges (8) being bonded to the said one
component and the other of the flanges (10) having the tapped bore.
6. A connection in a gutter as claimed in any one of the preceding claims, characterized
in that the tapped bore is one of a plurality of tapped bores disposed in a row extending
across the width of the gutter, each tapped bore receiving a respective bolt (22)
extending through a respective opening in the connecting portion.
7. A connection in a gutter as claimed in any one of the preceding claims, characterized
in that the gasket (18) comprises a pair of ribs (20) which engage the connecting
portion and extend across the width of the gutter, the tapped bore being disposed
between the ribs (20).
8. A connection in a cutter as claimed in any one of the preceding claims, characterized
in that the gasket (18) is made from a hard resilient material.
9. A connection in a gutter as claimed in any one of the preceding claims, characterized
in that each gutter component comprises an upper skin (2) of water impervious material
providing a trough for carrying rain water, a lower skin (12), the edge regions of
which engage the edge regions of the upper skin (2) and the central region of which
is spaced from the central region of the upper skin (2) to provide a cavity (14) between
the upper skin (2) and the lower skin (12), and a body of thermally insulating material
disposed within the cavity (14), the connecting element (4) being bonded to the upper
skin (2) of the said one gutter component and the connecting portion comprising a
portion of the upper skin (2) of the other gutter component which projects beyond
the lower skin (12) of that other gutter component.
10. A connection in a gutter as claimed in claim 9, characterized in that the thermally
insulating material substantially fills the cavity (14).
11. A connection in a gutter as claimed in claim 9 or 10, characterized in that the
thermally insulating material comprises foamed plastics material.
12. A connection in a gutter as claimed in claim 11, characterized in that the foamed
plastics material serves to bond the upper and lower skins (2, 12) together.
13. A connection in a gutter as claimed in any one of the claims 9 to 12, characterized
in that the upper skin (2) comprises glass reinforced plastics material.
14. A connection in a gutter as claimed in claim 13, characterized in that the upper
skin (2) is formed by a pultrusion process.
15. A connection in a gutter component as claimed in any one of the claims 9 to 14,
characterized in that the lower skin comprises glass reinforced plastics material.
16. A method of making a gutter component, characterized in that the method comprises:
(i) manufacturing an upper skin (2);
(ii) manufacturing a lower skin (12);
(iii) applying a foamable material to the upper or lower skin;
(iv) bringing the edge regions of the upper and lower skins into contact to provide
a cavity (14) between the upper and lower skins, which cavity (14) encloses the foamable
material;
(v) allowing to causing the foamable material to foam thereby to fill the cavity (14);
and
(vi) allowing or causing the foamable material to set or cure.
17. A method as claimed in claim 16, characterized in that the upper skin (2) is manufactured
from glass reinforced plastics material by a pultrusion process.
18. A method as claimed in claim 16 or 17, characterized in that steps (iii) to (vi)
are performed with the lower skin (14) supported in a mould.