Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
Frame element with a support head, and building scaffold comprising
such a frame element
The invention relates to a frame element for a building scaffold, the frame
element
having the following:
a) A support head having a threaded spindle;
b) a frame pipe that can be mounted vertically in the building scaffold having
a
spindle receiving portion on a first axial frame pipe end, the threaded
spindle
being introduced partially into the spindle receiving portion;
c) a spindle nut mounted to the threaded spindle, the support head introducing
its
vertical load into the frame pipe via the threaded spindle in the mounted
state of
the frame element.
The previously described support head of the frame element generally serves to
transfer a vertical load to a building scaffold. For example, a concrete
formwork can be
placed or mounted onto the support head. Furthermore, the support head can be
used
as temporary support during refurbishing.
The object of the present invention is to provide a frame element that can
transfer
significantly more vertical load via the support head without being
significantly bulkier
.. and heavier. The object of the present invention is also to provide a
building scaffold
having such a frame element.
The object according to the invention is achieved by a frame element having
the
features as described herein and a building scaffold as described herein.
The object according to the invention is thus solved by a frame element for a
building
scaffold. The frame element has a support head having a threaded spindle. The
frame
element also has a frame pipe having a spindle receiving portion. The threaded
spindle
is partially introduced into the spindle receiving portion. The spindle
receiving portion is
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Date Recue/Date Received 2023-06-21
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005
English Translation
on a first axial end of the frame pipe. A spindle nut is mounted to the
threaded spindle in
such a way that the support head introduces its load into the frame pipe via
the
threaded spindle in the mounted vertical state of the frame element. The
spindle
receiving portion has a first spindle positioning nut that reduces the inner
diameter of
the frame pipe.
The first spindle positioning groove significantly improves the vertical load
bearing
capacity of the frame element without considerably increasing the weight of
the frame
element. The first spindle positioning groove increases the load bearing
capacity of the
frame element in two respects: On the one hand, the solidity of the frame pipe
is
increased in the region of the first spindle positioning groove due to the
configuration of
the first spindle positioning groove. On the other hand, the threaded spindle
is oriented
better in the frame pipe thanks to the reduced diameter of the frame pipe on
the first
spindle positioning groove. Overall, this results in the significantly
improved suitability of
the frame element for vertical load transfer.
The threaded spindle is preferably oriented as centered as possible in the
frame pipe by
the spindle positioning groove, a clearance fit being present between the
threaded
spindle and frame pipe for introducing the threaded spindle into the frame
pipe. The
longitudinal axis of the threaded spindle has the angle R relative to the
longitudinal axis
of the frame pipe, the angle R being less than 10, in particular less than 0.8
, preferably
less than 0.7 . As a result, the vertical load is guided into the frame pipe
as centrally as
possible to keep the moments occurring in the building scaffold to a minimum.
The first spindle positioning groove can extend parallel to the longitudinal
axis of the
frame pipe. At least three grooves distributed across the circumference of the
frame
pipe are preferably provided for orienting the threaded spindle. In a
preferred
embodiment of the first spindle positioning groove, however, it extends in the
circumferential direction of the frame pipe. The first spindle positioning
groove can be
designed to be discontinuous or circumferential in the circumferential
direction of the
frame pipe.
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English Translation
Particularly effective centering of the threaded spindle in the frame pipe is
done when
the axial spacing of the first spindle positioning groove from the first axial
frame pipe
end is smaller than the inner diameter of the spindle receiving portion.
More preferably, the spindle receiving portion preferably has a second spindle
positioning groove. The second spindle positioning groove is axially spaced
apart from
the first spindle positioning groove and reduces the inner diameter of the
frame pipe.
Due to the second spindle positioning groove, the orientation of the threaded
spindle in
the frame pipe is defined by at least two spindle positioning grooves that are
spaced
axially apart from each other, as a result of which the orientation, in
particular the
centering, of the threaded spindle is particularly precise.
The second spindle positioning groove can extend parallel to the longitudinal
axis of the
frame pipe. At least three grooves distributed across the circumference of the
frame
pipe are preferably provided for orienting the threaded spindle. As an
alternative to this,
the second spindle positioning groove can extend in the circumferential
direction of the
frame pipe. The second spindle positioning groove can be designed to be
discontinuous
or circumferential in the circumferential direction of the frame pipe.
In a more preferred embodiment of the invention, the spindle receiving portion
has a
third spindle positioning groove. The third spindle positioning groove is
spaced axially
further away from the first spindle positioning groove than the second spindle
positioning groove. The third spindle positioning nut reduces the inner
diameter of the
frame pipe. The third spindle positioning groove improves the orientation, in
particular
the centering, of the threaded spindle in the frame pipe.
The third spindle positioning groove can extend parallel to the longitudinal
axis of the
frame pipe. At least three grooves distributed across the circumference of the
frame
pipe are preferably provided for orienting the threaded spindle. As an
alternative to this,
the third spindle positioning groove can extend in the circumferential
direction of the
frame pipe. The third spindle positioning nut groove can be designed to be
discontinuous or circumferential in the circumferential direction of the frame
pipe.
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English Translation
The third spindle positioning groove is preferably spaced less axially far
apart from the
second spindle positioning groove than the second spindle positioning groove
is from
the first spindle positioning groove.
Particularly preferably, the second spindle positioning groove and/or the
third spindle
positioning groove reduces the inner diameter of the frame pipe just as much
as the first
spindle positioning groove. The radial play of the threaded spindle in the
frame pipe is
reduced significantly as a result of this, it nevertheless remaining easy to
introduce the
threaded spindle into the frame pipe.
On its second axial frame pipe end, which is opposite the first axial frame
pipe end, the
frame pipe can have a pin receiving portion into which a pin of a further
frame element
can be introduced. The pin receiving portion can have a first pin positioning
groove that
reduces the inner diameter of the frame pipe. The first pin positioning groove
mechanically reinforces the frame pipe in the region of the pin receiving
portion.
The first pin positioning groove can extend parallel to the longitudinal axis
of the frame
pipe. At least three grooves distributed across the circumference of the frame
pipe are
preferably provided for orienting the threaded spindle. As an alternative to
this, the first
pin positioning groove can extend in the circumferential direction of the
frame pipe. The
first pin positioning groove can be designed to be discontinuous or
circumferential in the
circumferential direction of the frame pipe.
The axial spacing of the first pin positioning groove from the second axial
frame pipe
end is preferably smaller than the inner diameter of the first pin positioning
groove.
More preferably, the pin receiving portion has a second pin positioning groove
that is
axially spaced apart from the first pin positioning groove and reduces the
inner diameter
of the frame pipe. As a result, the pin of a further frame element is centered
at two pin
positioning grooves in the pin receiving portion that are spaced axially apart
from each
other.
The second pin positioning groove can extend parallel to the longitudinal axis
of the
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PCT/EP2017/054773 CA 03016937 2018-09-06 MIP Ref.: PER-
005
English Translation
frame pipe. At least three grooves distributed across the circumference of the
frame
pipe are preferably provided for orienting the threaded spindle. As an
alternative to this,
the second pin positioning groove can extend in the circumferential direction
of the
frame pipe. The second pin positioning nut groove can be designed to be
discontinuous
or circumferential in the circumferential direction of the frame pipe.
In a more preferred embodiment of the frame element, the frame pipe has a node
point
on which
a) a crossbar of the frame element is connected to the frame pipe, or
b) a coupling point is installed for connecting a crossbar,
the frame pipe having a first reinforcing groove in the region of the node
point. The first
reinforcing groove is spaced less than 15 cm from the node point in a first
axial direction
and reduces the inner diameter of the frame pipe or increases the outer
diameter of the
frame pipe. Due to the first reinforcing groove, the frame element is
reinforced in an
area in which it is loaded particularly heavily, namely in the region of the
node point.
.. Due to the first reinforcing groove, the frame pipe offers a higher
resistance and
moment of inertia in the region of the pressure point of the crossbar. The
coupling point
can be designed in the form of a rosette for connecting a crossbar.
More preferably, the frame pipe has a further reinforcing groove in the region
of the
node point that is spaced less than 15 cm from the node point in a second
axial
direction and reduces the inner diameter of the frame pipe or increases the
outer
diameter of the frame pipe. The second axial direction is opposite the first
axial
direction. In other words, the node point is reinforced by a further
reinforcing groove in
both axial directions by one reinforcing groove in each case.
The spindle positioning groove(s) and the reinforcing groove(s) preferably
reduces the
inner diameter of the frame pipe to the same extent.
The object according to the invention is also solved by a building scaffold
having a
previously described frame element.
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* PCT/EP2017/054773 CA 03016937 2018-09-06 MIP Ref.: PER-005
English Translation
Further features and advantages of the invention are presented in the
following detailed
description of multiple exemplary embodiments of the invention, in the claims
and based
on the figures of the drawing that shows details that are essential to the
invention.
The features shown in the drawing are depicted in such a way that the special
features
according to the invention can be made clearly visible. The various features
can each
be realized in variants of the invention individually or in groups in any
combination.
Shown are:
Figure 1 a sectional view of a frame element from the prior art;
Figure 2 a sectional view of a frame element according to the invention;
Figure 3 a top view of a node point of a frame element according to the
invention; and
Figure 4 a perspective view of a building scaffold according to the invention.
Figure 1 shows a frame element 10 according to the prior art. Frame element 10
has a
frame pipe 12. A spindle receiving portion 14 is designed in frame pipe 12. A
threaded
spindle 16 is introduced into spindle receiving portion 14. Threaded spindle
16 has an
external thread 18. Known frame element 10 also has a spindle nut 20. Spindle
nut 20
has an internal thread 22 with which spindle nut 20 is attached to external
thread 18 of
threaded spindle 16.
Spindle receiving portion 14 has the same inner diameter along the entire
axial
direction. Threaded spindle 16, which is supported axially via spindle nut 20
on frame
pipe 12, has a position skewed at angle & More specifically, longitudinal axis
23a of
threaded spindle 16 is inclined by angle IS relative to longitudinal axis 23b
of frame pipe
12. The angle 11 is typically 1.29 .
In contrast to figure 1, figure 2 shows a frame element 10 according to the
invention.
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English Translation
According to figure 2, frame element 10 has a frame pipe 12 with a spindle
receiving
portion 14. Furthermore, frame element 10 has a threaded spindle 16 on which a
spindle nut 20 is arranged. Spindle receiving portion 14 has a first spindle
positioning
groove 24, a second spindle positioning groove 26 and a third spindle
positioning
groove 28. Spindle positioning grooves 24, 26, 28 define the effective inner
diameter of
spindle receiving portion 14 for threaded spindle 16. Due to spindle
positioning grooves
24, 26, 28, threaded spindle 16 is arranged in frame pipe 12 at a much smaller
inclination. The angle 11 between longitudinal axis 23a of threaded spindle 16
and
longitudinal axis 23b of frame pipe 12 is, in particular, less than 0.8 ,
preferably less
than 0.7 . In comparison to frame element 10 according to figure 1, the
vertical load
bearing capacity of frame element 10 is increased by approximately 10% as a
result. In
addition thereto, the spindle receiving portion is mechanically reinforced
against kinking
by spindle positioning grooves 24, 26, 28.
Figure 2 depicts a further frame element 30 (dashed lines) whose pin 32 can be
introduced into frame pipe 12.
Frame pipe 12 thus has a first axial frame pipe end 34 into which threaded
spindle 16
can be introduced. Furthermore, frame pipe 12 has a second axial frame pipe
end 36
into which pin 32 of further frame element 30 can be introduced. A pin
receiving portion
38 for receiving pin 32 in frame pipe 12 is designed on second axial frame
pipe end 36.
A mechanical reinforcement of pin receiving portion 38 as well as improved
centering of
pin 32 is done by a first pin positioning groove 40 and a second pin
positioning groove
42.
Figure 3 shows a further frame element according to the invention 10. Frame
element
10 has a node point 44 having a coupling point 46. In the present case,
coupling point
46 is designed in the form of a rosette. Crossbars 48, 50 are arranged at
coupling point
46.
It is evident from figure 3 that frame pipe 12 has a first reinforcing groove
54 which is
designed to be spaced apart from coupling point 46 in frame pipe 12 in a first
axial
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PCT/EP2017/054773 CA 03016937 2018-09-06 MIP Ref.: PER-
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English Translation
direction 56. A second reinforcing groove 58 is designed in frame pipe 12 in
first axial
direction 56 at a distance from coupling point 46. Shoulders 60, 62 of
crossbars 48, 50
are in the region of frame pipe 12 between first reinforcing groove 54 and
second
reinforcing groove 58 on frame pipe 12. First reinforcing groove 54 and second
.. reinforcing groove 58 thus form an area of frame pipe 12 that is
mechanically especially
stable in which, in particular, the mechanical stability against buckling of
frame pipe 12
is very high.
Frame pipe 12 has a further reinforcing groove 64. Further reinforcing groove
64 is
spaced apart from coupling point 46 in a second axial direction 66. First
axial direction
56 and second axial direction 66 run along longitudinal axis 23b of frame pipe
12,
second axial direction 66 being opposite first axial direction 56. Further
reinforcing
groove 64 allows insertion tabs 68, 70 of crossbars 48, 50 to be pressed
mechanically
against frame pipe 12 particularly firmly without resulting in the plastic
deformation of
frame pipe 12 when crossbar 48 and/or 50 is loaded.
Alternatively or in addition to described reinforcing grooves 54, 58, 64,
frame element
10 can be designed with at least one additional reinforcing groove 72 in frame
pipe 12
between axially adjacent coupling points, of which only one coupling point 46
is
depicted in figure 3.
Figure 4 shows a building scaffold 74 having multiple frame elements, of which
only a
first frame element 10 is provided with a reference character in figure 4 for
the sake of
clarity. By way of example, frame element 10 has a node point 44 on
which¨likewise
by way of example¨a crossbar 48 is arranged. Because of the small depiction of
building scaffold 74, no groove according to the invention is visible in
figure 4. For the
removal of a load, frame element 10 has a support head 76.
When viewing all figures of the drawing together, the invention relates, in
summary, to a
frame element 10 comprising a frame pipe 12 into which a threaded spindle 16
is partly
introduced at one end. Threaded spindle 16 is guided in frame pipe 12 by at
least one
spindle positioning groove 24, 26, 28, in particular multiple spindle
positioning grooves
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PCT/EP2017/054773 CA 03016937 2018-09-06 MIP Ref.: PER-
005
English Translation
24, 26, 28. Frame pipe 12 is mechanically reinforced by spindle positioning
groove(s)
24, 26,28 in the region of threaded spindle 16 received in frame pipe 12. At
the same
time, the maximum inclination of threaded spindle 16 in frame pipe 12 is
reduced by
spindle positioning groove(s) 24, 26, 28. Overall, a force can thus be
substantially more
strongly applied to frame element 10 in the direction of longitudinal axis 23b
of frame
pipe 12. At the other end, frame pipe 12 can have at least one pin positioning
groove
40, 42, in particular multiple pin positioning grooves 40, 42. Alternatively
or in addition
thereto, frame pipe 12 can have at least one reinforcing groove 54, 58, 64 in
the region
of a node point 44. Alternatively or in addition thereto, frame pipe 12 can
have at least
.. one additional reinforcing groove 72 between two node points 44.
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