[0001] The invention relates to a ventilation device for building roofs in a construction
according to the preamble to claim 1.
[0002] In known ventilation devices of this type, the housing and the closing device form
structural units which are fully assembled by the manufacturer and which, after being
transported to the building site are placed, as a whole, on a substructure, for example
a base, and anchored on this.
[0003] The transport and handling of such prefabricated units is difficult and expensive.
[0004] It is the object of the invention to provide a ventilation device of the type mentioned
at the beginning which can be delivered in handy individual parts to the building
site and can be assembled quickly and easily on the spot.
[0005] In order to solve this problem, the ventilation device according to the invention,
starting from one according to the preamble to claim 1, is characterised by the features
mentioned in the characterising part of claim 1. With regard to optional further developments,
reference should be made to the claims 2 to 6.
[0006] The ventilation device according to the invention permits a completely separate delivery
of the parts forming the closure device and of the housing and possibly of a frame
section to be fitted between housing and base and a rapid and easy joining of the
parts on site which can be carried out without any special previous knowledge and
with a simple tool, while the supporting and locking rails not only simplify the assembly
but also facilitate the alignment of the parts and compensate for manufacturing tolerances.
[0007] One specific embodiment of the invention will now be described in detail by way of
example with reference to drawings:
[0008] In the drawings:
FIG. 1 shows a perspective, simplified general view of a ventilation device according
to the invention;
FIG. 2 shows, in a broken away, enlarged detail, a vertical partial section in the
region of a longitudinal wall of the housing; and
FIG. 3 shows a broken away separate illustration of the bearing elements for a flap.
[0009] The ventilation device illustrated in the drawings is adapted for roofs of buildings
used industrially, commercially or municipally and comprises a housing 2 defining
a ventilation opening 1, a base 3 to be secured to a roof, a frame section 4 interposed
between base 3 and housing 2 and a closing device which consists essentially of two
flaps 5, 6 as well as pivot drives 7 which are supported on a transverse girder 8.
[0010] The housing 2 comprises longitudinal walls 9, 10 which are situated opposite one
another, parallel in pairs, as are transverse walls 11 and 12. The frame section 4
in turn comprises longitudinal and transverse struts 13, 14 and 15, 16 which are situated
opposite one another, parallel in pairs and on which the housing 2 is placed with
its longitudinal and transverse walls 9, 10, and 11, 12 and fixed by means of snap
closures 17.
[0011] The flaps 5, 6 which are alike, are pivotally movable in opposite directions about
external hinge axes 18 by means of the pivot drives 7 and, in their closed position,
engage with their edges over a gutter 19 crossing the ventilation opening 1 centrally
as well as over the walls 9, 10, 11, 12 of the housing 2 carrying them, at their upper
edge. Accordingly, the ventilation opening 1 in the housing 2 is completely covered
in the closed position of the flaps 5, 6 protected from the entry of the weather and
also sealed off from the passage of air by means of seals.
[0012] As can be seen in detail from Figures 2 and 3, the longitudinal walls 9, 10 of the
housing 2 are provided with supporting and locking rails 20, 21 and 22, 23 which extend
longitudinally and all of which (with a horizontal alignment of the ventilation device)
extend horizontally and preferably over the whole length of the longitudinal walls
9, 10.
[0013] The supporting and locking rails 20, 21 serve to support bearing blocks 24 and 25
for the flaps 5, 6 and are each formed by an upright rib which is parallel to the
outer surface of the longitudinal walls 9, 10 of the housing 2, with spacing, and
which is disposed on a base plate 26 projecting outwards. The bearing blocks 24, 25
comprise an angle support which can be placed with an upright arm 28 astride the associated
rib 20, 21 and, in the superimposed position, can be located by an arm 29, bent inwards
at an angle, on the upper edge of the longitudinal walls 9, 10 by means of a holding-down
means, for example a screw 30 or another suitable snap closure. In the lower region
of its arm 28, each bearing block 24, 25 is provided with a bearing bore to receive
a pivot 27, the entrances of the bearing bores of the two bearing blocks 24 facing
towards one side (towards the right in Figure 3) and that of the bearing bore in the
third bearing block 25 facing towards the opposite side.
[0014] Each flap 5, 6 is provided with three pivot fittings 31 each of which carries one
of the pivots 27. Two of the three pivots 27, which jointly define the hinge axis
l8, are disposed at one and the same side, in Figure 3 in the left-hand side, of their
pivot fitting 3l, while the third pivot is associated with its pivot fitting 3l at
the opposite side. In order to mount a flap 5 or 6, this is at first only fixed by
two bearing blocks, namely the bearing blocks 24, to the associated longitudinal wall,
the longitudinal wall l0 in Figure 3, after which the third bearing block 25 is subsequently
pushed onto its associated pivot 27 in a displacement movement taking place from right
to left in Figure 3 and is then fixed in its operating position by means of its holding-down
means 30. In this manner, with easy mounting, the flaps 5, 6 are, at the same time,
locked to the associated longitudinal wall 9 or 10 in a manner which, without destroying
parts of the device, can only be released with the flap 5 or 6 open.
[0015] The supporting and locking rails 22, 23 serve to support the head ends 32 of the
transverse girder 8 for the pivot drives 7 and co-operate in pairs for this purpose.
The upper rail 22 defines a holding groove 33 which is open downwards, while the lower
rail defines a holding groove 34 which is open upwards, in which grooves the associated
head end 32 of the transverse girder 8 engages with an upwardly directed and a downwardly
directed locking nose 35, 36 respectively. The head ends 32 of the transverse girder
8 are first inserted with their locking noses 36 in the lower holding groove 34 of
the rail 23 before the upper rail 22 is then fitted, with locking location, and fixed,
for example by screwing.
[0016] In the example illustrated, in which the housing 2 is constructed in the form of
a comparatively low unit and is superimposed on a frame section 4 with comparatively
high longitudinal and transverse struts 13, 14, 15, 16, the upper rail 22 of each
pair of rails 22, 23 is associated with the longitudinal wall 9, 10 of the housing
2 and the lower rail of the pair of rails is associated with the particular longitudinal
strut 13 or 14 of the frame section 4 underneath it.
[0017] In order to facilitate subsequent positioning and to improve its location on the
associated wall 9, 10 of the housing 2, the upper rail 22 is provided with an outer
extension 37 in the form of a web projecting horizontally outwards which can be inserted
in an insertion groove 38 in the inside of the longitudinal wall 9, 10 of the housing
2 and be located in the inserted position. This location may be effected by screwing
or by means of suitable snap closures.
[0018] In the open position of the flaps 5, 6, upright baffles 39, located on the housing
2 in a suitable manner at the ends, shield the ventilation opening 1 from the unwanted
entry of air into the building through wind action.
1. A ventilation device for building roofs, having a housing (2) which defines a ventilation
opening (1) and the longitudinal and transverse walls (9, 10; 11, 12) of which are
situated opposite one another, parallel in pairs, having a closing device with two
flaps (5, 6) which are alike and are pivotally movable in opposite directions about
external hinge axes (l8) by means of pivot drives (7) and which, in their closed position,
engage with their edges over a gutter (l9) crossing the ventilation opening (l) centrally
as well as over the walls (9, 10; 11, 12) of the housing (2) carrying them, at their
upper edge, and completely cover the ventilation opening (l) in the housing (2) and
protect it from the entry of the weather, and having a transverse girder (8) which
is secured to the longitudinal walls (9, 10) and which engages under the gutter (l9)
and supports the pivot drives (7) for the flaps (5, 6) characterised in that the longitudinal
walls (9, 10) of the housing (2) comprise supporting and locking rails extending longitudinally
for a location, which is adjustable as desired axially, of the parts of the closing
device.
2. A device as claimed in claim l,
characterised in that first supporting and locking rails (20, 2l) for supporting bearing
blocks (24, 25) for the flaps (5, 6) are each formed by an upright rib disposed parallel
to the outer surface of the longitudinal wall (9, l0) of the housing (2), with spacing,
on a base plate (26) projecting outwards, and the bearing blocks (24, 25) comprise
an angle support which can be placed with the underside of an upright arm (28) astride
an upright rib (2l, 22) and which can be located, by an arm (29) bent inwards at an
angle, on the upper edge of the longitudinal wall (9, l0) by means of a holding-down
means (30).
3. A device as claimed in claim l or 2,
characterised in that each flap is provided with three pivot fittings (3l) each of
which carries one of the pivots (27) jointly defining the hinge axis (l8), two of
these pivots (27) projecting in the same direction and the third pivot (27) projecting
in the opposite direction from their pivot fitting (3l) and engaging in correspondingly
aligned bores of three bearing blocks (24, 25) which, by their arrangement, form a
locking means for the flap.
4. A device as claimed in one of the claims l to 3, characterised in that the second
supporting and locking rails (22, 23) for supporting the head ends (32) of the transverse
girder (8) for the pivot drives (7) each comprise a pair of rails (22, 23), the lower
rail (23) of each pair of rails defining a holding groove (34) which is open upwards
and the upper rail (22) defining a holding groove (33) which is open downwards, and
the head ends (32) of the transverse girder (8) each comprise one locking nose which
is directed upwards (35) and one locking nose (36) which is directed downwards, which
noses engage in the associated holding grooves (33, 34).
5. A device as claimed in claim 4,
characterised in that the housing (2) with its longitudinal and transverse walls (9,
l0; ll, l2) forms a structural unit superimposed on a frame section (4 ) with longitudinal
and transverse struts (l3, l4; l5, l6) and the lower rail (23) of each pair of rails
(22, 23) is associated with a longitudinal strut (l3, l4) of the frame section (4)
and the upper rail (22) is associated with the associated longitudinal wall (9, l0)
of the housing (2).
6. A device as claimed in claim 4 or 5,
characterised in that the upper rail (22) is provided with an outer extension (37)
and can be inserted horizontally in an insertion groove (38) in the inside of the
longitudinal wall (9, l0) of the housing (2) and can be located in the inserted position.