Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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CA 03239387 2024-05-21
Ceiling formwork element
The invention relates to a ceiling formwork element for connecting
to a supporting head of a formwork support, comprising:
a frame for a formwork board,
a blocking element on the frame for engaging under a securing
protrusion on the supporting head of the formwork support.
Furthermore, the invention relates to a ceiling formwork,
comprising:
a ceiling formwork element, and
a formwork support having a supporting head.
Finally, the invention relates to a method for setting up a ceiling
formwork and a method for dismantling a ceiling formwork.
Various embodiments of ceiling formworks are known in the state of
the art, in which ceiling formwork elements are supported on the
supporting heads of formwork supports. The arrangement on the
formwork supports secures the ceiling formwork element in the
horizontal direction. In such ceiling formworks, it is further
known that the supporting head of the formwork support comprises
an undercut, which is brought into engagement with a corresponding
securing means on the ceiling formwork element.
For example, DE 42 11 200 C2 shows a supporting head with hook
strips, into which a corresponding hook edge on a formwork board
element can be hooked in.
With the help of this securing means, the ceiling formwork element
is secured in the mounted state on the supporting head of the
formwork support in the vertical direction. This is referred to as
liftout guard, which in particular ensures that the ceiling
formwork element remains connected to the supporting head in the
event of wind loads that can act on the ceiling formwork element
from below. Since ceiling formwork elements are typically supported
on four formwork supports at the four corners, an intermediate
state can arise during the setting up of the ceiling formwork in
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.
which the ceiling formwork element rests on only three formwork
heads. In this situation, too, the blocking element ensures an
appropriate securing of the position in the vertical direction.
However, the known liftout guards involve considerable
disadvantages. If the securing means is integrated into the
supporting head, the liftout guard cannot be deactivated. Thus, it
is not possible to remove a single ceiling formwork element from
an array of ceiling formwork elements or to install a single ceiling
formwork element in a gap of such an array of ceiling formwork
elements. In general, it is necessary to pivot the ceiling formwork
elements upwards into the intended position. Vertical installation
or removal is not possible.
This problem can be solved in principle by using removable
additional parts for the liftout guard.
An example of this is shown in DE 4308607 Al, which addresses the
problem that with the state of the art of DE 42 11 200 02, when
several formwork board elements are arranged in their horizontal
position, form stripping can only be started at a certain point.
In contrast, DE 4308 607 Al provides wing-shaped weights that can
be pivoted about a cylindrical pin, with which wing-shaped weights
the retaining edge on the formwork board element can be over-
engaged. However, it is a drawback that the function of such wing-
shaped weights or counterweights can be impaired by dirt.
Furthermore, this state of the art is only designed for horizontal
ceiling formwork, since the wing-shaped weights always pivot into
the vertical position.
In general, the known embodiments pose a risk of misuse. It can
have particularly serious consequences if the liftout guard is not
mounted correctly or - in the case of removable liftout guards -
is forgotten altogether.
Furthermore, a different solution is known from AT 409 648 B, in
which a formwork carrier can be held on the supporting head by a
catch spring. However, this embodiment is susceptible to dirt and
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damage. Moreover, the complexity and the weight of the supporting
head is increased.
In this context, the object of the present invention aims to
mitigate or eliminate at least individual drawbacks of the state
of the art. The object of the invention is preferably to provide a
liftout guard for ceiling formwork, which opens up more variable
application possibilities without neglecting the safety aspects.
This object is achieved by a ceiling formwork element according to
claim 1, a ceiling formwork according to claim 16, a method for
setting up a ceiling formwork according to claim 21, and a method
for dismantling a ceiling formwork according to claim 24.
In the ceiling formwork element according to the invention the
blocking element is connected to a spring element, so that the
blocking element is transferable from a blocking position into a
release position against the spring force of the spring element.
The ceiling formwork according to the invention comprises a ceiling
formwork element and a formwork support having a supporting head.
The supporting head comprises a securing protrusion, wherein the
blocking element engages under the securing protrusion of the
supporting head in the blocking position.
In the blocking position, the blocking element on the frame of the
ceiling formwork element is configured to engage under the securing
protrusion on the supporting head. This means that the blocking
element is arranged under the securing protrusion on the supporting
head in such a way that the ceiling formwork element is blocked
from being lifted vertically upwards. As in the state of the art,
the blocking element in the blocking position effects a liftout
guard, which prevents the ceiling formwork element from lifting
off from the supporting head, in particular due to wind loads from
below. According to the invention, the blocking element can be
elastically deflected against the spring force of the spring
element in order to move the blocking element from the blocking
position under the securing protrusion into the release position
laterally next to the securing protrusion. Thus, the blocking
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element can be deactivated by overcoming the spring force of the
spring element, in order to enable, for example, a vertical
lowering of the ceiling formwork element onto the supporting head
or a vertical lifting of the ceiling formwork element from the
supporting head. Due to the elastic restoring forces of the spring
element, the blocking element returns to the initial position in
the unloaded state, which corresponds to the blocking position in
the mounted state of the ceiling formwork element on the formwork
support. The blocking element is thus biased in the direction of
the blocking position with the aid of the spring element. This
reduces misuse. Furthermore, it is avoided that the blocking
element unintentionally remains in the release position.
Advantageously, the application possibilities of the ceiling
formwork element can thus be extended without impairing safety.
Furthermore, the embodiment according to the invention is less
susceptible to damage or dirt.
For the purposes of this disclosure, the location and direction
indications, such as "top", "bottom", "vertical", "horizontal",
refer to an intended use of the ceiling formwork, wherein the
formwork support is placed in vertical alignment on a horizontal
ground and the ceiling formwork element is arranged horizontally
in the concreting position. Of course, the ceiling formwork can
also be used to produce inclined ceilings, in which case the
location and direction indications must then be transferred
accordingly.
In order to achieve lateral movability of the blocking element
between the blocking position and the release position, it is
favourable if the blocking element is pivotable from the blocking
position into the release position about a preferably substantially
horizontal pivot axis. The blocking element can thus be pivoted
out of the blocking position under the securing protrusion on the
supporting head against the spring force, so that, for example, a
lifting of the ceiling formwork element is enabled. In addition,
in the release position, the support can be removed or a ceiling
formwork element can be inserted from above.
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For secure and stable connection to the securing protrusion on the
supporting head, it is favourable if the blocking element is
provided on a lower edge region of a longitudinal or transverse
side part of the frame. By arranging the blocking element on the
lower edge region of the side part, it can be ensured that the
blocking element is arranged in the blocking position under the
securing protrusion of the supporting head, so that the intended
up-lift protection, i.e. the protection against an unintentional
lifting off of the ceiling formwork element from the supporting
head of the formwork support, is achieved. Depending on the
embodiment, the blocking element can be located on a longitudinal
or on a transverse side of the frame, wherein the longitudinal side
refers to the longer side of the ceiling formwork element and the
transverse side refers to the narrower side of the ceiling formwork
element, which is preferably rectangular in plan view in
conjunction with the formwork board.
In a preferred embodiment, the blocking element in the blocking
position is preferably arranged substantially completely under a
retaining edge on the upper side of the frame. The retaining edge
supports an edge of the formwork board on the underside and can
protrude laterally outwards beyond a longitudinal or transverse
side part of the frame. Due to the fact that the blocking element
is covered by the retaining edge on the upper side in the blocking
position, the blocking element is protected, in particular from
falling objects and from getting dirty by concrete.
The retaining edge preferably comprises a drip edge on the outside
on the underside, which further improves the protection of the
blocking element.
If the spring element is fastened to the inner side of the side
part of the frame, protection against dirt is achieved, which
reduces malfunction. Advantageously, the movability of the blocking
element between the blocking position (activated state) and the
release position (deactivated state) can thus also be ensured under
the adverse conditions typical of construction sites.
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Regarding a compact, lightweight and cost-effective construction,
a flat spring may be provided as the spring element, which is
connected at one end to the frame and at the other end to the
blocking element. A spring plate, for example, may be provided as
a flat spring. The flat spring is preferably connected to the frame
via a permanent connection, in particular a rivet connection.
Preferably, the flat spring is arranged in the blocking position
of the blocking element substantially parallel to a side part of
the frame. This results in a particularly space-saving and
protected arrangement. It is particularly favourable if the flat
spring does not protrude inwards beyond a lower edge of the frame
in the blocking position.
In another embodiment, a spring clip is provided as the spring
element, which may be bent from a round wire, for example.
In a first preferred embodiment the blocking element protrudes
outwards from the side part of the frame in the blocking position,
in particular substantially in the longitudinal or transverse
direction of the frame. Thus, the blocking element in the blocking
position projects laterally from the outside of the frame, as a
result of which the blocking element in the blocking position is
arranged under the securing protrusion on the supporting head.
In order, on the one hand, to protect the spring element in the
interior of the frame and, on the other hand, to enable the
engagement under the securing protrusion outside the frame, the
side part of the frame preferably comprises a passage opening,
through which the blocking element protrudes outwards in the
blocking position. Preferably, the passage opening comprises the
same cross-sectional geometry as the blocking element. If, for
example, a pin with a circular cross section is provided as the
blocking element, a circular passage opening may correspondingly
be provided on the side part of the frame. In the blocking position,
the blocking element is preferably arranged in the passage opening
on the side part with a substantially precise fit, but preferably
with a (slight) clearance.
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Depending on the embodiment, a pin, for example, may be provided
as a blocking element. The pin may comprise a circular cross
section. Furthermore, the pin may be tapered forward at the free
end. However, the blocking element may also have other shapes, for
example, the blocking element may be implemented as a catch with a
non-circular cross section, in particular with a rectangular cross
section.
In a preferred embodiment, the blocking element is fixedly
connected to the spring element.
In another preferred embodiment, the blocking element and the
spring element are connected to one another in that the blocking
element bears against the spring element, in particular against
the lower end of the spring element. The blocking element can be
moved from the blocking position into the release position against
the spring force of the spring element. This embodiment is
particularly advantageous if the side part of the frame comprises
the above-described passage opening, through which the blocking
element protrudes outwards in the blocking position. The separate
configuration of the blocking and spring element results in the
advantage that the spring force can be transmitted to the blocking
element without the blocking element being bound to the movement
of the spring element. The above-described flat spring, which is
connected at one end to the frame and at the other end, here via
the contact on the contact surfaces, to the blocking element, is
preferably provided as the spring element. During the transfer from
the blocking position to the release position, the flat spring is
pivoted, wherein the blocking element can be displaced
substantially linearly along the passage opening. Advantageously,
the blocking element does not have to pivot along with the spring
element, since a relative movement between the blocking element
and the spring element is made possible. In the case of a fixed
connection of the spring element to the blocking element, the
problem could arise that the blocking element might get wedged in
the passage opening when pivoting along with the spring element.
This problem can be reliably avoided by using the separate spring
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element in contact with the blocking element. This advantage occurs
in particular if the blocking element is guided in the passage
opening with a slight clearance. The transmission of the spring
force via the contact surfaces is also advantageous with regard to
dirt, which can accumulate at the passage opening. Finally, the
installation and removal of the spring element and the blocking
element are also particularly simple if the spring element and the
blocking element are implemented as separate components that are
brought into contact in the mounted state.
In a preferred embodiment, the blocking element comprises an
upwardly directed hook, in particular at the free end. If the
securing protrusion on the supporting head comprises a hook element
directed downwards, in particular obliquely downwards, the ceiling
formwork element is even better protected in the blocking position
against unintentional lifting off from the supporting head. In the
concreting position of the ceiling formwork, the upwardly directed
hook of the ceiling formwork element is arranged adjacent to the
downwardly directed hook element of the supporting head in such a
way that the hook of the ceiling formwork element hooks with the
hook element of the supporting head, the blocking element remains
in the blocking position, and lifting off is thus prevented if the
ceiling formwork element is lifted, for example, obliquely upwards
without prior transfer of the blocking element into the release
position. Only if the blocking element is deactivated against the
force of the spring element before lifting the ceiling formwork
element can the hook of the ceiling formwork element pass the hook
element of the supporting head.
Preferably, the supporting head comprises two downwardly directed
hook elements on each securing protrusion on the underside. As a
result, the hooks can be secured to blocking elements of two
adjacent ceiling formwork elements.
In order to provide sufficient spring force for the transfer
between the blocking and release positions, the blocking element
can be fastened to the free end of the spring element.
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In another preferred embodiment, the blocking element protrudes
inwards from the frame. In this embodiment, the blocking element
is located in the release position and in the blocking position in
the interior of the frame, as a result of which the blocking element
is protected particularly reliably from dirt and damage.
For secure connection to the supporting head, it is favourable in
this embodiment if the blocking element protrudes substantially
diagonally inwards from a corner region between two side parts of
the frame.
In a structurally simple and reliable embodiment, the blocking
element is formed integrally with the spring element.
A flat piece may be provided for forming the blocking element and
spring element integrally. The blocking element may be formed by
the free end of the flat piece. In order to facilitate engagement
with the securing protrusion, the free end of the flat piece may
be angled, in particular around a bending or folding edge. The
spring element may be formed by an elastically deformable central
portion of the flat piece.
In addition, the flat piece may comprise at least one fastening
portion for fastening to the inner side of the frame. The fastening
portion can be connected via a connecting portion to the central
portion for forming the spring element, wherein the central portion
merges into the free end for forming the blocking element.
In the case of a fastening in the corner region between two abutting
side parts of the frame, it is favourable if the flat piece
comprises two fastening portions which are arranged at an angle of
preferably substantially 900 to one another and are fastened to
adjoining side parts of the frame, in particular arranged at an
angle of 90 to one another.
In order to achieve a liftout guard at various regions of the
ceiling formwork element, in particular at all four corners of the
ceiling formwork element, a plurality of, in particular four,
blocking elements are preferably provided on the frame, in
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particular on the longitudinal and/or transverse sides of the frame
and/or on the corner regions of the frame. The blocking elements
may be identical and implemented according to one of the embodiment
variants described above. Thus, the blocking elements can each be
connected to a spring element, so that the blocking elements can
each be transferred from the blocking position into the release
position against the spring force of the spring element. Depending
on the embodiment, two blocking elements may be located at opposite
ends of the longitudinal or transverse side of the frame in order
to engage under the securing protrusions of two formwork supports
arranged at a distance from one another. It is particularly
preferred if two blocking elements respectively are located at
opposite ends on both longitudinal or transverse sides of the frame
in order to engage under the securing protrusions of four formwork
supports arranged at a distance from one another. These embodiment
variants may also be combined with each other. Thus, two blocking
elements can be provided on opposite longitudinal and transverse
sides of the frame at opposite ends. In this variant, a total of
eight blocking elements are provided.
In order to achieve a formwork surface, i.e. a concrete contacting
surface, the frame may be connected to the formwork board on the
upper side. In one embodiment, the formwork board is permanently
connected to the frame. In this way, a so-called panel formwork is
obtained, which is used as a single component (which, as intended,
cannot be disassembled). In an alternative embodiment, the formwork
board is reversibly detachably connected to the frame. In this
embodiment, therefore, the ceiling formwork element can be
disassembled into the frame and the formwork board.
Preferably, the at least one securing protrusion on the supporting
head is integrally connected, i.e. in a non-demountable fashion,
to a base plate of the supporting head.
In a preferred embodiment, the securing protrusion on the
supporting head comprises, on the upper side, a run-on slope for
actuating the blocking element when the ceiling formwork element
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is lowered vertically in a horizontal position onto the supporting
head.
In a first embodiment variant of the supporting head, the securing
protrusion is directed outwards with respect to a longitudinal axis
of the formwork support. In this case the blocking element can
protrude outwards from the side part of the frame in the blocking
position, in particular substantially in the longitudinal or
transverse direction of the frame.
In a second embodiment variant of the supporting head, the securing
protrusion is directed inward. In this variant, the blocking
element can protrude inwards from the frame, i.e. in the direction
of a centre of the frame.
In order to be able to mount a plurality of ceiling formwork
elements on the supporting head, the supporting head preferably
comprises a plurality of, in particular four, securing protrusions
for connecting to a plurality of, in particular four, ceiling
formwork elements. Preferably, exactly four securing protrusions
are provided on the supporting head, each of which is connectable
to at least one blocking element on the frame of the ceiling
formwork element.
In the method for setting up a ceiling formwork, at least the
following steps are carried out:
providing a formwork support having a supporting head,
providing a ceiling formwork element of any one of the above-
described embodiments, and
connecting the ceiling formwork element to the supporting head
of the formwork support, wherein the blocking element is arranged
on the frame of the ceiling formwork element below the securing
protrusion on the supporting head of the formwork support, so that
the ceiling formwork element is secured against lifting off from
the formwork support.
In a first embodiment variant of the method, the ceiling formwork
element is pivoted upwards over a longitudinal or transverse side
of the frame in order to arrange the blocking element in the
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blocking position, wherein the blocking element preferably does
not come into contact with the securing protrusion on the
supporting head.
In a second embodiment variant of the method, the ceiling formwork
element is lowered substantially vertically onto the supporting
head in order to arrange the blocking element in the blocking
position, wherein the blocking element is deflected into the
release position against the spring force of the spring element
when it strikes the securing protrusion and is transferred into
the blocking position by the spring force when it is lowered
further.
In the method for dismantling a ceiling formwork, in which a ceiling
formwork element in one of the previously described embodiment
variants is connected to a formwork support, at least the following
steps are carried out:
transferring the blocking element of the ceiling formwork
element from the blocking position into the release position, and
lifting off the ceiling formwork element substantially in the
vertical direction from the formwork support.
The invention will be explained in more detail with reference to
exemplary embodiments illustrated in the drawings.
Figs. 1 to 3 each show an embodiment variant of a ceiling formwork
according to the invention, in which a plurality of ceiling
formwork elements are supported on formwork supports.
Fig. 4 and Fig. 5 show detailed views of a ceiling formwork element
according to the invention in a mounted state on the supporting
head and secured against up-lifting by a spring-loaded blocking
element.
Figs. 6 to 8 show an embodiment variant in which the ceiling
formwork element is pivoted upwards about a shorter transverse side
into the mounted position on the supporting head.
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Figs. 9 to 11 show a further embodiment variant in which the ceiling
formwork element is pivoted upwards about a longitudinal side into
the mounted position on the supporting head.
Figs. 12 to 14 show another embodiment variant in which the ceiling
formwork element is lowered vertically downwards onto the
supporting head.
Figs. 15 to 17 show various embodiments of the ceiling formwork
element, which differ in the number and arrangement of the blocking
elements for the liftout guard.
Fig. 18 and Fig. 19 show views of a further embodiment variant of
the ceiling formwork element, in which the blocking element is
arranged in the interior of the frame.
Fig. 20 shows a cross section along line XX-XX in Fig. 21.
Fig. 21 shows a plan view of the ceiling formwork element according
to Figs. 18 to 20.
Fig. 22 and Fig. 23 show a further embodiment variant, in which
the blocking element comprises a hook at the free end for securing
to the supporting head.
Figs. 24 to Fig. 26 show a further embodiment, in which the blocking
element is separate from the spring element, wherein the blocking
element bears against the spring element in such a way that the
blocking element can be moved against the spring force of the
spring element.
Figs. 1 to 3 show various embodiment variants of a ceiling formwork
1 with which a ceiling or floor element can be concreted. Depending
on the dimension of the ceiling or floor element, the ceiling
formwork 1 comprises a plurality, in this case, for example, six,
ceiling formwork elements 2, which are supported on telescopic,
i.e., length-adjustable, ceiling or formwork supports 3. The
formwork supports 3 are located in a vertical position on a
horizontal ground. At the upper end, the formwork supports 3 each
comprise a supporting head 4, to which one to four ceiling formwork
elements 2 can be reversibly detachably attached at the corners.
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The ceiling formwork elements 2 each comprise a (single-part or
multi-part) formwork board 5, which is configured to be rectangular
with longer longitudinal sides and shorter transverse or narrow
sides. The upper sides of the formwork boards form a flat formwork
surface, which comes into contact with the concrete during
concreting. The ceiling formwork element 2 moreover comprises a
formwork frame, hereinafter shortly referred to as frame 6, which
supports the formwork board 5. The frame 6 comprises four side
parts 7, namely two longitudinal side parts 7A on the longitudinal
sides of the ceiling formwork element 2 and two transverse side
parts 7B on the transverse or narrow sides of the ceiling formwork
element 2. In the embodiment shown, the side parts 7 are arranged
perpendicular to the main plane of the ceiling formwork element 2,
defined by the formwork facing of the formwork board 5.
In the embodiment variant of Fig. 1, the ceiling formwork element
2 is implemented as a panel formwork element in which a single
formwork board 5 is connected to the frame 6. Depending on the
embodiment, the formwork board can be permanently connected, i.e.
as intended, cannot be disassembled or reversibly detached, to the
frame 6. In addition, longitudinal and/or transverse stiffeners
may be provided between the longitudinal side parts 7A and/or
transverse side parts 7B of the frame 6.
In the embodiment variant of Fig. 2, two formwork elements 9, each
along with the formwork board 5, are reversibly releasably
connected to the circumferential frame 6, in particular in a
mounting position inclined to the horizontal.
In the embodiment variant of Fig. 3, the frame 6 is first arranged
in the horizontal concreting position and subsequently connected
to the formwork board 5 (not shown in Fig. 3).
All embodiment variants of the ceiling formwork element 2 have in
common that at least one blocking element 10 is arranged on the
frame 6, which, in the mounted state of the ceiling formwork element
2 on the formwork supports 3, engages under one of the four securing
protrusions 11 provided on the supporting heads 4 of the formwork
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support 3. Thus, the securing protrusion 11 forms an undercut for
the blocking element 10. Furthermore, retaining parts 4A, in this
case retaining pins, onto which the ceiling formwork element 2 is
placed, are provided on the supporting heads 4. The retaining pins
4A serve both for horizontal securing as well as a rotation point
for a previously described mounting type. As a result, the ceiling
formwork element 2 is secured against up-lifting, which could be
caused in particular by wind forces that can load the ceiling
formwork element 2 from below.
In the embodiments shown, the blocking element 10 is connected to
a spring element 12 in such a way that the blocking element 10 can
be moved against the spring force of the spring element 12 from a
blocking position engaging under the securing protrusion 11 into a
release position, here a temporary mounting position, arranged
laterally next to the securing protrusion 11.
In the embodiment shown, the liftout guard or blocking element 10
is mounted on the frame 6 pivotable about a horizontal pivot axis
in the main plane of the ceiling formwork element 2, i.e. in the
mounted state on the supporting head 4. In this case, the blocking
element 10 is provided on a lower edge region of one of the
longitudinal side parts 7A or transverse side parts 7B of the frame
6 in such a way that the blocking element 10 is arranged under the
securing protrusion 11 when ,the ceiling formwork element 2 is
mounted on the supporting head 4.
Advantageously, in the blocking position the blocking element 10
is arranged substantially completely under a retaining edge 6A on
the upper side of the frame 6. Thus, in the blocking position, the
blocking element 10 is covered on the upper side by the retaining
edge 6A, which surrounds the formwork board 5 on the edge side and
projects laterally outwards beyond the side part 7. As a result,
the blocking element 10 is protected, in particular from falling
objects and getting dirty by, for example, concrete.
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The retaining edge 6A preferably comprises a drip edge on the
underside, which further improves the protection of the blocking
element 10.
The frame 6 moreover comprises a lower edge 6B, in particular on
the longitudinal and transverse sides, which secures the ceiling
formwork element 2 in conjunction with the retaining part 4A in
the horizontal direction against displacement away from the
securing protrusion 11, and thus the blocking element 10 remains
in the blocking position.
Figs. 4 to 17 show a first embodiment variant in which the spring
element 12 is fastened to the inside of the respective side part 7
of the frame 6, but the blocking element 10 projects outwards in
the blocking position from the outside of the side part 7 of the
frame 6, i.e. away from the centre of the ceiling formwork element
2. To this end, the side part 7 of the frame 6 comprises a passage
opening 13 through which the blocking element 10 projects outwards
in the blocking position. In the embodiment variant shown, a flat
spring, in particular a small metal plate, which is connected at
one end to the frame 6 and at the other end to the blocking element
10, is provided as the spring element 12. A pin, which is attached
to the free, lower end of the spring element 12, here in the form
of the flat spring, is provided as the blocking element 10.
Fig. 4 and Fig. 5 show the mounted state of the ceiling formwork
element 2 on the supporting head 4 of the formwork support 3. The
blocking element 10 protrudes, at a vertical distance, in a
direction parallel to the main plane of the ceiling formwork
element 2 under the securing protrusion 11, which in this
embodiment variant is directed outwards in the radial direction
with respect to the longitudinal axis 3A of the formwork support 3
(cf. Fig. 4). If vertical forces, in particular wind loads, act on
the ceiling formwork element from below, cf. arrow 14 in Fig. 5,
the blocking element 10 abuts against the underside of the securing
protrusion 11, thereby preventing the ceiling formwork element 2
from lifting off from the supporting head 4 in this region.
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Figs. 6 to 8 show a first variant of the method for setting up the
ceiling formwork 1. In this variant, the ceiling formwork element
2 is pivoted upwards into the horizontal position via a transverse
side, i.e. one of the shorter sides, of the frame 6, cf. arrow 15.
In this case, the blocking element 10 is arranged in the blocking
position under the securing protrusion 11. If, during the upward
pivoting, the blocking element 10 comes into contact with the
securing protrusion 11 on the supporting head 4, the blocking
element 10 is pressed in by the flexible arrangement on the ceiling
formwork element 2. When the ceiling formwork element is completely
pivoted upward, the blocking element 10 is automatically returned
by the connected spring element 12 back into the blocking position
behind the securing protrusion 11.
Figs. 9 to 11 show a second variant of the method during setting
up the ceiling formwork 1. In this variant, the ceiling formwork
element 2 is pivoted upwards into the horizontal position via a
longitudinal side, i.e. one of the longer sides, of the frame 6,
cf. arrow 16. The blocking element 10 is arranged in the blocking
position under the securing protrusion 11 without contacting the
securing protrusion.
Figs. 12 to 14 show a third variant of the method during setting
up the ceiling formwork 1. In this variant, the ceiling enabling
element 2 is lowered in the vertical direction, cf. double arrow
17, from above onto the supporting head 4. The securing protrusion
11 on the supporting head 4 comprises a run-on slope 18 on the
upper side. If the blocking element 10 strikes the run-on slope
18, the blocking element 11 is pressed inwards against the action
of the spring element 12, thereby releasing a further lowering of
the ceiling formwork element 2 until the blocking element 11 snaps
under the securing protrusion 11 due to the restoring forces of
the spring element 12.
As can be seen from Figs. 15 to 17, a plurality of blocking elements
can each be provided on the frame 6 in conjunction with a spring
17
CA 03239387 2024-05-21
element 12. These blocking elements 10 with the spring elements 12
can be identical to the embodiment described above.
In the variant of Fig. 15, two blocking elements 10 are provided
on each transverse side of the ceiling formwork element 2, which
project in the longitudinal direction of the ceiling formwork
element 2, with respect to the blocking position, from the
transverse side parts 7B of the frame 6.
In the variant of Fig. 16, two blocking elements 10 are provided
on each longitudinal side of the ceiling formwork element 2, which
project in the transverse direction of the ceiling formwork element
2, with respect to the blocking position, from the longitudinal
side parts 7A of the frame 6.
In the variant of Fig. 17, two blocking elements 10 are provided
on each longitudinal and transverse side of the ceiling formwork
element 2, which project in the longitudinal or transverse
direction of the ceiling formwork element 2, with respect to the
blocking position, from the longitudinal side parts 7A and
transverse side parts 713 of the frame 6.
Figs. 18 to 21 show another embodiment of the ceiling formwork 1.
In this embodiment, the blocking element 10 and the spring element
12 are arranged inside the internal space of the frame 6 framed by
the side parts 7. The blocking element 10 protrudes inwards with
respect to the side parts 7 of the frame 6. In the embodiment
shown, the blocking element 10 protrudes substantially diagonally
inwards in the direction of the centre of the ceiling formwork
element 2 from a corner region 8 formed between two side parts 7
of the frame 6. The supporting head 4 comprises a correspondingly
configured securing protrusion 11, which in this embodiment is
directed inwards towards the longitudinal axis 3A of the formwork
support 3. In the mounted concreting position, the blocking element
is again arranged under the securing protrusion 11 on the
supporting head 4.
In this embodiment, the blocking element 10 can be formed
integrally with the spring element 12. To this end, a flat piece
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19 may be provided, wherein a free end portion 19A of the flat
piece 19 forms the blocking element 10 and a central portion 19B
forms the spring element 12. In the embodiment shown, the central
portion 19B of the flat piece 19 is connected via a connecting
portion 190 to two fastening portions 19D, which are fastened to
the inner sides of the two adjacent side parts 7 of the frame 6.
Figs. 22 and 23 show an embodiment variant in which the blocking
element 10 is implemented as a catch with an angular cross section.
At the free end, the blocking element 10 comprises an upwardly
directed hook 20. Correspondingly, the supporting head 4 comprises
two obliquely downwardly directed hook elements 21 on the
undersides of the securing protrusions 11, which prevent the
ceiling formwork element 2 from being unintentionally lifted off
from the supporting head 4 in the concreting position, with the
blocking element 10 being in the blocking position.
Fig. 24 to Fig. 26 show a modification of the embodiment according
to Fig. 4 and Fig. 5. In contrast to the embodiment of Fig. 4 and
Fig. 5, the blocking element 10 according to Fig. 24 to Fig. 26 is
separated from the spring element 12. The blocking element 10 and
the spring element 12 are connected to one another in that the
blocking element 10 bears against the spring element 12, in this
case against the lower end of the spring element 12. In the
embodiment shown, a pin-shaped portion of the blocking element 10
protrudes outwards through the passage opening 13 in the blocking
position. In the interior of the frame, the blocking element 10
comprises a contact element, in this case a small contact plate
10A, which prevents the blocking element 10 from falling out of
the passage opening 13 to the outside. In the embodiment variant
shown, a flat spring, which bears against the small contact plate
of the blocking element 10, so that the blocking element 10 is
pressed outwards in the direction of the blocking position, is
provided as the spring element 12.
19
