[0001] The present invention relates to a modular scaffold system, being a spacial supporting
framework with mainly vertical and horizontal supporting elements of tubes, in which
the vertical supporting elements, being the posts, are supplied with so called rosettes
along the longitudinal axis of it at distances of approximately half a meter for connection
of the mentioned horizontal supporting elements, in which the mentioned scaffold system
is mostly placed in front of exterior walls of engineering structures to be finished,
in which the engineering structures are mostly bearing framed structures with several
floors and with a height between floors at stroke height H, in which the scaffold
system is placed at a short distance from the bearing framed structure of the building
or buildings and in which the mentioned short distance or interspace is bridged with
brackets, on which mostly horizontal floor elements are applied at stroke height H
and in which further facilities can be applied for the work level and the supply of
building bricks and mortar for the mason.
[0002] It is known, that scaffold systems follow the raising of engineering structures with
several floors and with that serve as a safety device of the building units for bypass
of the construction workers from one unit to the other and making the supply of building
material possible. Also, the scaffold construction is used to finish the exterior
walls, which usually involves an extensive exterior masonry.
[0003] The scaffold system is traditionally constructed of pipes or tubes in order to form
a spacial construction, consisting of vertical posts with in between horizontal joists.
For that, the vertical posts and the horizontal joists are interconnected with special
couplings. On the transverse horizontal joists, mostly at floor level, floor parts,
batter boards or floor elements are mounted. To construct the above mentioned traditional
scaffolding a lot of work and skill is necessary. In a later stage, in order to build
the scaffold against an exterior wall of an engineering structure faster, a so called
scaffold system is developed, in which around the tube-shaped vertical posts rosettes
are applied every 500 mm, to which the horizontal connecting element, mostly with
cottering, can be coupled. The mentioned rosettes consist of disc-shaped flanges with
radial around the circumference connection holes for the cottering. This is, for example,
described in patent document US 4 603 756, submitted 20-07-1984 by LAYHER, Ulrich,
Im Lailen 16, D-7129, Guglingen-Elbensbach, Germany. This patent document clearly
shows, drawn in oblique projection, the construction of a modular scaffold system.
With the above mentioned scaffold construction story heights of 2500 mm can be well
reached every time, in which the scaffold, on every junction of post and horizontal
joists (also mostly tubes), must be anchored to the exterior wall of the engineering
structure or the framed structure.
[0004] The anchors are known e.g. from the German Offenlegungschrift DE 196 45 671 A1 from
LAYHER, Georg, 74336 Brechenheim, Germany, submitted 06-11-1998 and titled: "Wandverankerungs-Hilfsvorrichtung
aus Metall". The device consists of a tube-shaped fixing arm with on the end a welded
hanging pin, which falls into a plugged in anchoring threaded end on the exterior
wall. The vertical tube-shaped posts, for example, can be connected in vertical sense
with a usual welded in pin in the end of the tube-shaped post.
[0005] The floor height of home and office buildings with several storeys has been lifted
to 2700 mm over the years, for which tube-shaped posts with rosette distances of 540
mm are developed and in which the anchorage of every junction of vertical posts and
horizontal joists were still necessary and just enough. In the Dutch Construction
Regulations one assumes a storey height (= the distance between the upper side of
the floor up to the upper side of the next floor) of approximately 3000 mm. The anchorage
pattern must stay the same, but the scaffold becomes too slack so that other developments
must be made. At each 3,00 x 2,50 = 7,50 m
2 exterior wall an anchorage of the scaffold to the exterior wall must be done. This
is very costly due to the time needed and material used, in which it must also be
noted that placement of the anchorage at the required positions is not always possible.
The conclusions are that the number of costly anchorages on the exterior wall of the
engineering structures should be strongly limited, for example, from an anchorage
per approximately 7,50 m
2 exterior wall to an anchorage per approximately 15 m
2 exterior wall. This due to the high costs and the occurring delay when mounting the
modular scaffold system.
[0006] The known modular scaffold systems have disadvantages with regard to the high costs
by applying the large number of anchorages and by enlarging the storey height this
modular scaffold has less bearing capacity. Further, the modular scaffold system must
especially be usable for the mason of an exterior wall, in which the lifting standard
with regard to the working conditions of the mason must be watched. The lifting standard
indicates a masonry height of 200 mm above the working surface till 200 + 1500 = 1700
mm above the same working surface. For this, special facilities must be applied to
the modular scaffold system with regard to the supply of goods and the work level
of the mason or bricklayer. Also a disadvantage of the known modular scaffold system
is, that the mentioned specific facilities for the mason are missing or are not constructed
with the known brackets and such.
[0007] It is the aim of the present invention to provide such a modified and improved specific
modular scaffold system, in which the aforementioned disadvantages are solved and
in which modular scaffold system can be put onto the market in an efficient and economic
responsible way. For this, a modular scaffold system according to the invention is
further developed and/or modified in a very inventive way, characterized in that,
the mentioned stroke height H is approximately 3000 mm, in which also the mentioned
anchorage pattern of the posts on the exterior wall for every floor in a horizontal
sense is not constructed at the position of each post, in which at floor height or
stroke height H also at the position of the mentioned rosettes of the poles, specific
stiffening diagonals are mounted in framework form.
[0008] The advantage is, that the number of expensive anchorages on the exterior wall of
the engineering structure can be strongly limited, so that the modular scaffold system
can be set up much faster and is supplied with rigid framework-shaped horizontal connections,
in which the mentioned modular scaffold system can also be attached along several
buildings standing in a row. It also occurs, that the posts of the modular scaffold
system cannot be attached at a certain storey height of the engineering structure
over a number of units or specific exterior wall construction, through which the arisen
horizontal framework connection per storey can then give a solution.
[0009] Further, the device according to the invention is further developed in such a way,
that the mentioned specific stiffening diagonals is constructed recessed and to which
end elements are applied at the ends of the scaffold tubes to provide an undisturbed
passage to the upper floor elements or steel floor platforms or to intermediate scaffolding
poles to be applied with scaffolding deals attached onto that, in which the mentioned
end elements consist of a stiffened rhombic profile with cottering welded to the scaffold
tube in order to transmit horizontal forces and with that acting moments over a height
of approximately 80 mm onto mentioned stiffening diagonal.
[0010] The advantages are that whatever floor elements one chooses, no hinder is experienced
from the specific stiffening diagonals and that the horizontal work of force in the
modular scaffold system can be passed on to vertical connections and the exterior
wall of the engineering structure in a mechanically very suitable way.
[0011] Further, the device according to the invention is further developed in such a way,
that the mentioned facilities for the mason or bricklayer consists of specific coupling
brackets on the rosettes of the posts of the scaffold system, which are adjustable
in relation to its suspension both in horizontal and especially in vertical sense
over respectively a length L1 and L2, on which corresponding floor elements are applied
and the facilities for supplying the mason or bricklayer consist of a small attachment
scaffold to be mounted to the scaffold floor per storey, in which the mentioned small
attachment scaffold has a maximum height of approximately 1000 mm and that it consists
of trestles with scaffold deals, which small attachment scaffold can, if necessary,
be coupled to the mentioned posts.
[0012] The advantages are, that every time the mason can be supplied in an efficient way
and according to the rules for working conditions and even according to the lifting
standards and can do his masonry on the exterior wall. For the different dimensions,
see figures 2A, 2B and 2C.
[0013] The preferred construction of the invention will be described by way of example,
and with reference to the accompanying drawing.
[0014] In which:
Fig. 1A and 1B shows a front view (fig. 1A) and a cross-section over the line B-B
(fig. 1B) of the specific modular scaffold system according to a preferred embodiment
of the invention;
Fig. 2A, 2B and 2C show a side view (figure 2A) of the specific modular scaffold system
of figure 1A and two positions of the facilities for the masons' work platform in
figures 2B and 2C according to a preferred embodiment of the invention;
Fig. 4A and 4B show a top view of the end element of the specific stiffening diagonal
with scaffolding deal (figure 4A) and a side view concerning the end element on the
vertical post of the modular scaffold system according to a preferred embodiment of
the invention (fig. 4B); and
Fig. 5A and 5B show a side view of the specific coupling bracket of the rosettes of
the post of the scaffold system, which is adjustable in horizontal as well as in vertical
sense (fig. 5A) and a top view of the mentioned coupling bracket according to the
invention.
[0015] Figure 1A shows a front view of the specific modular scaffold system 1 according
to a preferred embodiment of the invention. The modular scaffold system 1 consists
of the vertical posts 2 supplied with rosettes 3, onto which the horizontal joists
4 are mounted with, for example, the scaffolding pole 6 for the scaffolding deals
5. Further, for safety reasons, a guardrail 7 is coupled to the rosettes 3 or mounted
with cottering. The outer plate shores 8 have been applied in the vertical plate for
vertical discharge of horizontal forces. The anchorages 9 on the exterior wall of
the engineering structure are to be fixed according to a preferred pattern in horizontal
sense and in vertical sense by the suitable framework construction of the stiffening
diagonals 13.
[0016] Figure 1B shows a cross-section over the line B-B of figure 1A. Here, the specific
coupling brackets 10 for connection to the exterior wall 11 of the engineering framed
structure are indicated. Also the scaffolding poles 6, the horizontal joist tubes
12 and the specific stiffening diagonals 13 are shown.
[0017] Figures 2A up to 2C show a side view of the specific modular scaffold system 1 to
show the use as a mason scaffold with the specific coupling brackets 10 and the small
attachment scaffold 14. The mason 15 may only build from a height of 200 mm to a height
of approximately 1700 mm.
[0018] Figures 2B and 2C show the specific coupling bracket 10 adjusted in horizontal and
in vertical sense to meet the above mentioned lifting standard. The horizontal adjustment
is approximately 200 mm and the vertical adjustment is approximately 250 mm, through
which every time rosettes 3 can be used to the posts 2 of the modular scaffold system
1. Onto the small attachment scaffold 14 the mortar tub 16 is placed and can be filled
with mortar from the scaffolding deals by the foreman (not indicated).
[0019] Figure 3A shows enlarged in top view the specific stiffening diagonal 13 according
to the invention placed in the modular scaffold system.
[0020] Figure 3B shows an overall view in oblique projection of the specific stiffing diagonal
13, which consists of a scaffolding tube with special developed end element 17 for
a recessed position of it beneath the scaffolding poles 13. Arrow X refers from figure
3A to figure 3B.
[0021] Figure 4A shows a top view of the mentioned end elements 17, which with a known cottering
18 is connected to the rosette 3 of the aforementioned post 2.
[0022] Figure 4B shows a side view of it. The connection of the stiffening diagonal 13 is
done by the necessary vertical recede over approximately 80 mm with the aid of a rhombic
profile 19 in cross-section, which is welded to the cottering 18 on one side and to
the stiffening diagonal 13 on the other side, in which the rhombic profile 19 can
be further reinforced for the occurring work of force. The mentioned rhombic shape
is necessary to undisturbedly apply the scaffolding deals and/or floor elements.
[0023] Figure 5A shows a side view of the specific in horizontal and in vertical sense adjustable
bracket 10 coupled onto the rosettes 3 of the post 2. A drawn line indicates the adjustable
coupling bracket 10, the maximum and vertical and horizontally adjusted shape at point
of departure and in dotted line. Here, the rosette distance is, as usual, approximately
500 mm, and the maximum vertical adjustability is approximately 250 mm, while the
horizontal adjustability is approximately 200 mm. This is all shown in mm in figure
5A.
[0024] In figure 5B this and that is shown in top view for further explanation. The locking
of a certain horizontal or vertical position of the adjusted bracket 10 is done with
a pin through a bore construction. The mounting of the bracket 10, which is adjustable
in horizontal and in vertical direction onto the rosettes 3 of the post 2 can be done
with the mentioned cottering 18.
[0025] Finally it has to be emphasized, that the above description constitutes a preferred
embodiment of the present invention and that further variations and modifications
are still possible without departing the scope of this patent description.
1. Modular scaffold system (1), being a spacial supporting framework with mainly vertical
and horizontal supporting elements of tubes, in which the vertical supporting elements,
being the posts (2), are supplied with so called rosettes (3) along the longitudinal
axis of it at distances of approximately half a meter for connection of the mentioned
horizontal supporting elements (4, 12), in which the mentioned scaffold system is
mostly placed in front of exterior walls (11) of engineering structures to be finished,
in which the engineering structures are mostly bearing framed structures with several
floors and with a height between floors at stroke height H, in which the scaffold
system is placed at a short distance from the bearing framed structure of the building
or buildings and in which the mentioned short distance or interspace is bridged with
brackets (10), on which mostly horizontal floor elements are applied at stroke height
H and in which further facilities can be applied for the work level and the supply
of building bricks and mortar for the mason (15), characterized in that, the mentioned stroke height H is approximately 3000 mm, in which also the mentioned
anchorage pattern (9) of the posts (2) on the exterior wall (11) per floor in horizontal
sense is not constructed at the position of each post, in which at floor height or
stroke height H also at the position of the mentioned rosettes (3) of the poles (2)
specific stiffening diagonals (13) are mounted in framework form.
2. Modular scaffold system (1) as claimed in claim 1, characterized in that, the mentioned specific stiffening diagonals (13) is constructed recessed and to
which end elements (17) are applied at the ends of the scaffold tubes to provide an
undisturbed passage to upper floor elements or steel floor platforms or to intermediate
scaffolding poles (6) to be applied with scaffolding deals (5) attached onto that.
3. Modular scaffold system (1) as claimed in claim 2, characterized in that, the mentioned end elements (17) consist of a stiffened rhombic profile (19) with
cottering (18) welded to the scaffold tube in order to transmit horizontal forces
and with that acting moments over a height of approximately 80 mm onto mentioned stiffening
diagonal (13).
4. Modular scaffold system (1) as claimed in claims 1 and 3, characterized in that, the mentioned pattern of stiffening diagonals (13) with the mentioned horizontal
supporting elements (4, 12) in horizontal sense form a retaining form and rigid framework
from anchorage to anchorage (9) of the posts (2) by coupling onto the rosettes (3)
of the posts (2) at floor level of the bearing framed structure and in which the locking
is done with the mentioned cottering (18).
5. Modular scaffold system (1) as claimed in aforementioned claims, characterized in that, the mentioned tubes are mostly steel scaffold tubes with an external dimension of
48,3 mm and a wall thickness of 3,2 mm.
6. Modular scaffold system (1) as claimed in claim 2, characterized in that, the mentioned scaffolding deals (5) have a cross-section of 200 x 30 mm and a length
of approximately 5 m and that the wooden or steel floor panels consist of cantilever
plates with receding hook-shaped elements at the ends for placement and locking onto
mentioned horizontal supporting element (12), so that the top side of the horizontal
supporting elements (12) and the top side of the floor panels lie approximately in
one surface.
7. Modular scaffold system (1) as claimed in claim 1, characterized in that, the mentioned facilities for the mason or bricklayer (15) consists of specific coupling
brackets (10) on the rosettes (3) of the posts (2) of the scaffold system, which are
adjustable in relation to its suspension both in horizontal and especially in vertical
sense over respectively a length L1 and L2, on which corresponding floor elements
are applied and the facilities for supplying the mason or bricklayer (15) consist
of a small attachment scaffold (14) to be mounted to the scaffold floor per storey.
8. Modular scaffold system (1) as claimed in claims 1 and 7, characterized in that, the mentioned horizontal adjustability of the extendability of the specific coupling
brackets (10) is between 100 and 400 mm, preferably approximately 200 mm.
9. Modular scaffold system (1) as claimed in claims 1, 5, 7 and 8, characterized in that, the mentioned vertical adjustability of the specific coupling brackets (10) is between
100 and 400 mm, preferably approximately 250 mm.
10. Modular scaffold system (1) as claimed in claims 1, 5, 6, 7, 8 and 9, characterized in that the mentioned small attachment scaffold (14) has a maximum height of approximately
1000 mm and that it consists of trestles with scaffold deals, which small attachment
scaffold (14) can, if necessary, be coupled to the mentioned posts (2).