FR2573115A1 - SCAFFOLDING FRAME PANEL. - Google Patents

Abstract

THE SCAFFOLDING FRAME PANEL HAS A METAL FRAME WITHIN A PLATE3 HAVING A WALKING AND WORKING SURFACE. THE METAL FRAME IS SHAPED BY SIDEBOARDS2 AND SLEEPERS4. THE LONGONS CAN BE FORMED OF STEEL SHEET OR OF LIGHT METAL PROFILES, AS HOLLOW BODIES WITH PERPENDICULAR WALLS BETWEEN THEM AND THE CROSS BODIES, OF STEEL PROFILES WITH A U-SHAPED SECTION, ON WHICH THE HOOKS ARE PROVIDED5. THE LONGERONS2 AND THE CROSSERS4 ARE CONNECTED BETWEEN THEM BY RIVETS11, 12.

Description

The invention relates to a frame panel

  molding equipped with a metal frame formed of side members and

  sleepers and a plate fixed to the frame and forming an over-

walking and working face.

  Many frame panels are known, among which also those with the metal frame rails

  are made of press-spun aluminum profiles,

  linked by sleepers. We have, for example, used

  dres constituted in the manner of scales and we fixed in the

  ends of the hooks for hooking the pan-

  scaffolding frame. Among other things, we used

  profiles which present in the region of the upper chord

  there is a housing groove limited by wings,

  sliced to the plate. For such spar profiles, I-profiles were used, possibly with the grooves formed therefrom, as also described in

DE-A-32 45 126 and 32 29 957. -

  By patent FR 2 527 251 (82 08 649), we know

  a building element for a scaffold frame panel

  dage, the longitudinal members of which are formed of rectangular tubular profiles which each have, in the region of the upper members, a housing groove open inwards, in which the plate is inserted. The housing groove is located entirely above the frame

  superior. The upper and lower chords present

  internally ribs suitable for the application

  cation of hook elements for support on the scaffold

  dage. Either weld the side members to the sleepers, or

  they are assembled by screws so that between the long

  qerons is a pressure tube which is crossed by a tensioned bar which pushes the side members against the tube

  pressure kept under tension by the screws. Several tra-

  Verses of this kind are distributed over the length of the pan-

  scaffolding frame frames. At each end is

  one of these. Corner joints by welding

  due to constraints that can prevent an application

  uniform scaffolding frame panels when

  stacking and / or in the scaffolding. The links by sub-

  dage significantly decrease the resistance in large Ren

  regions next to the welds. The screw connections are com-

  teuses. The utility model DE 83 05 623 discloses a scaffolding board in which the profile of the beams has a groove in the region of the upper chord but does not have a closed box form, but

  has an L-shaped shape in the lower region.

  verses are T-profiles with upper chords

  res are hollowed out in an exactly adjusted way and which are provided with a slit in the core. Optionally, a riveting of the wooden plate to a wing can be provided. However, only cohesion by embedding occurs between the longitudinal sections and the transverse sections. The

  manufacturing tolerances cannot be offset.

  If the part to be inserted is too large, it cannot be inserted at all. If it is made too small

  even to a small extent, construction has inevitable-

  There is a tendency to reinforce and the power transmissions are greatly reduced or it is necessary to weld. You cannot form a stable framework that has reasonable cohesion

  without plate inserted. It takes several sleepers which support-

also the plate below.

  By the utility model DE 80 10112, we know

  a frame made from several similar profiles

  press spun, which is welded at the corners and at the

  very assemblies, and in which a double box profile

  its has a vertical limiting wing next to the

  plate placed at the top. The plate cannot be enclosed

  rée. The upper chord is not at the highest point possible. Consequently, the moment of resistance is more unfavorable. Welded construction is disadvantageous

  with regard to resistance in the weld regions

  age and can lead to stresses and deformation.

  The utility model DE 19 52 977 discloses a scaffolding construction in which the side members

  are made up of pieces shaped each time in two

  sheet metal in the shape of a box hung to each other,

  one of the boxes being shaped inward relative-

  ment to a continuous wall vertically under the plate and the other box towards the outside relative to the wall

  vertical next to the plate. The result of such a profile is

  quence significantly less stability for the whole pan-

  scaffolding frame as a single box profile

  re having several folds, since at the place of

  link there is only one longitudinal link but no

  transverse connection of the boxes and thus the case

  its superior can be bent relative to the box

  fair. Appropriate measures must be taken against the

  bending and buckling. The accumulation of matter in mid

  place is statically disadvantageous. The profile is not

  no longer designed in a stackable form because the wall

  ticale is of continuous form. The design is oriented

  on the conditions of application at the end without

  special chets, or the like, and therefore not suitable for a scaffolding frame panel that is hung with hooks or spikes. The inserted plate is formed of

  corrugated sheet of great height, directed longitudinally.

  The plate is not aligned for transverse stiffness.

  dirty. The wavy shape requires transverse supports

  suitable since the corrugations only provide stiffness

longitudinal alignment.

  The frame panels known so far are not entirely satisfactory in various respects. Of a

  apart, the load capacity of these frame panels is li-

  mixed, especially in the case of large spans. This must be attributed, on the one hand, to the earlier forms of

  profiled and, on the other hand, to an unsatisfactory execution

  te means of connection and connection, Insofar as we used welded frames all around with most often several transverse connections, it is produced

  resistance losses and internal stresses notably

  due to assembly by welding, which leads to

  easily knows how to twist the panels, so it

  there was no satisfactory application in the scaffold-

  ge. In most cases, however, the profiles were too weak and there were already twists when lifting. The

  permanent alternating stresses occurring in welds

  res have also occasionally led to problems.

  By having the fixing hooks in the region of the ends of the beams, it was also not possible to take account of variable hanging needs. The plates forming the

  walking and working surface generally required support

  yours multiple by transverse links. The transverse connections were also necessary, again, to secure the profiles, under load, against deflection and buckling. The numerous ties of the sleepers were

expensive to make.

  The invention aims to indicate modes of execution

  tion of frame panels of this kind in which, without increasing or noticeably increasing the dead weight, greater load capacities are possible

  simple manufacturing and great permanent security.

  According to the invention, at least the

  following characteristics: - the frame is made up of side members and cross members fixed at their ends;

  - the side members are formed of tubular hollow bodies

metal;

  - the metal hollow bodies are limited at least in part

  tied by flat surfaces of their walls, arranged per-

  pendulum or almost perpendicularly between them and are with several edges; - the sleepers are made of metal; - the sleepers are connected to the side members by rivets - the sleepers have tabs at their ends

  angled riveting engaging snugly in the

bes hollow beams;

  - on the sleepers are provided arrangements for the

  scaffolding frame panel.

  As a result of the construction of the side members in the form of tubular hollow bodies of different shape, it is possible to

  considerably increase the load capacity without increasing

  notable mention of dead weight and we also get a

  torsional rigid frame structure. As a result of the dis-

  position of the arrangement for hanging the scaffolding frame panels on the sleepers, we can better adapt

  and more freely to the needs of the case in point the agencies-

  most often in the form of hooks

  open at the bottom, only in the case of hooks on the ends

  beams. They can also be manufactured more advantageously as regards the manufacturing technique, because they can be advantageously connected to the short crosspieces, at the desired location. As a result, advantage is also taken of the advantageous position of the crosspieces at the ends of the side members. As a result of the riveted connections between crosspieces and longitudinal members, stresses which lead to deformation and resistance losses by welding are avoided. By

  following the particularly advantageous form of the crossings

  its with riveted tabs bent at their ends,

  fitting into the hollow tubes, we need

  care of relatively few rivets and one can, by forming suitable riveting tabs located in several

  planes and in several angular positions, create an assembly

  very stable angle lock, easy to carry out on

  corresponding automatic chines that can be well executed

  cut. Riveting, especially with blind rivets, can be carried out during assembly, even after assembly, around the plate and it is not necessary to first make a complete frame. The combination of hollow-shaped beams with crossbars riveted by means

  also has the advantage that manufacturing and

  can be done more simply and with less

  play and that the assembly can be designed in a more ri-

  gide and more load-bearing. We make a frame construction

  stable, free of torsion during application and trans-

  port and which, given the great moments of resistance

  tubular hollow bodies, has such great stabili-

  té that transverse connections are not necessary in intermediate regions and that plates arranged

  freely become possible. The panel is light, economical

mique and durable.

  The spars can, as desired and

  needs, be made of different materials, in particular

  culier they can -so it is known to others

  constructions- be formed from light metal profiles,

  example of aluminum profiles spun by the press. We can

  then, without being linked to the manufacturing conditions of the pro-

  folded yarns, choose freer profile shapes for the different roles of the side members and we obtain, for a

  reduced weight, great stability. In another mode of exe

  cution very advantageous the side members can be formed from folded metal sheet, in particular steel sheet. This

  tubular execution of the frame rails allows the use of

  tion of high quality steel without any

  unwanted weight gain. Since the pro-

  multi-edge tubular wire ensures very good pro-

  resistance properties, it is possible more simply, in the case of lower efforts (for example in the case

  short frame panels) provide, instead of sheet metal

  steel another material, for example other sheets

  stainless steel or press extruded profiles.

  The sleepers can be designed in the form

  U-shaped folded sheet shapes, open inwards

  of the panel, with the appropriately bent riveting tabs and welded hooks, shaped into a U by the press. Instead of U-profiles, you can also use

  for cross members of rectangular tubes.

  The plate forming the walking and working surface can advantageously be a wooden plate or a plate of woody material, in particular a plywood or laminated wood plate, laminated wood

  to be installed with the cross-fiber direction

  dirty to the longitudinal axis of the frame panel. In the case of plywood, the fibers of the top layer of

  overlap are directed transversely to the long axis

  tudinal of the frame panels. In the case of other pan-

  neaux, for example of corrugated or molded sheets, the di-

  rection of the profile is transverse to the longitudinal axis of the frame panels. The plate then does not need atitr% supports. It is fixed, preferably {and to the PI frame, by means of rivets. It is formed as a whole from

  material resistant to water and preferably to boiling

  tion and having a suitable covering layer-

  frosted, preferably made of synthetic material.

  We connect the plate to the metal frame without support, to its

  longitudinal edges only and possibly repo-

  is on the sleepers or is inserted. We can then more easily

  cilely install and change it only when it needs to rest and be riveted in many places. The plaque

  can also be made of a sheet of metal or pro-

spun.

  In the invention, however, it is specified-

  to take advantage of the transverse rigidity of the board

  that in such a way that a satisfactory bearing assembly is produced and that the longitudinal-rigidity is ensured by appropriate application of the plate on the longitudinal members

  very stable and possibly by clamping or blocking.

  Thus, advantageously, the spars formed -

  tubular hollow bodies can be formed by a profi

  Light metal sheet designed stably against the

  bending, rotation and buckling over large lengths

  feeders without transverse bracing, connected to the plate

  that and which presents, in the region of the upper chord

  upper, a housing groove open inwards for the plate. Then, one obtains with certainty a good fixing between the box profile of the side members and the plate and the edge of the plate is at the same time protected against damage. Even in the case of overload, the

  clamped plate helps prevent twists

gerons, long in some cases.

  Thus, the housing groove can be formed between an upper chord wing extending beyond the line

  vertical wall interior and a horizontal bearing wing

  tale shifted down, relative to the previous one, by

  the thickness of the plate and a spoke limiting wing

  nure offset inwards relative to the inner wall

  vertical and which is formed on a rectangular profile

  light metal gular, also elongated, placed

  edge, preferably an aluminum extrusion profile

  se. Thus, we gather in an advantageous place, without

  ment, the advantages of the housing groove in itself known with vertical core and lower chord and the more advantageous properties of the rectangular hollow profile and additional possibilities of application surfaces and other rational forms are created. The advantage

  of the light metal profile according to the invention is that the mem-

  upper burn is located in the upper plane of the pan

  scaffolding frame and therefore has conditions

  more advantageous with regard to the moment of resistance

  this. The groove limiting wing and the supporting wing ho-

  rizontale constitute a stiffening element of the profile

  made of light metal for the side rails, which is particularly

  particularly advantageous for optimizing the conditions in

  with regard to weight, load capacity and abs-

  sence of plate support as well as possibilities

  omission of cross bracing. An important point

  bearing is that in cooperation with the special profile in

  light metal, the riveted connection with legs is very

  less than the screw connection with pressure tubes or

  other screw connections, because it exerts in the

  seems less constraint on the whole construction

  tion that an overall screwing, constrained transversely

or welding.

  To properly retain the plate over fairly long lengths and connect it securely without other protective and fixing elements, as, for example, according to DE-A-32 29 957, the horizontal support wing can be provided, at least in the anterior region, of a retaining profile, preferably of a sawtooth profile inclined in the

sense of penetration.

  Scaffolding frame panels must be

  stacked and often in tall stacks. He is then

  tageux to have auxiliary means to prevent slippage

  sement. Therefore, on the upper and lower sides

  longitudinal members may be provided with engaging elements-

  stack of longitudinally directed stack, fitting between them. These prevent lateral sliding of the plates with respect to one another and, on the other hand, make it possible to lift the plates on one side without the other slipping. Such stack engaging elements can be constructed in different ways. They can be designed in the form of folded steps of the sheet metal profile,

  with inclusion of the thickness of the plate riveted on it.

  Advantageously, the upper side of the longitudinal members can pre-

  feel a step located along the spar, raised on the outer side of the frame so that on the inner side of the frame, there is for the plate an application surface limited by this step. Thus, by the folded profile, taking into account the thickness of the plate, an engagement element is created without other auxiliary measures. The

  raising of the step directed longitudinally to the outside

  laughing on the upper side of the side members can be so large that the step exceeds to some extent the

  wooden cladding surface. To create the com-

  The lower side of the longitudinal members may have a longitudinal step on the inside of the frame.

  small height, facing downwards, whose width is cal-

  abutment so that when stacking the scaffolding frame panels, it is placed with a small

  spacing next to the inner side of the step provided at the side

  higher tee. As a result of this constitution, we get

  a profile of the hollow spar which contributes significantly to

  if to its overall stability by the multiple folds. In

  another suitable form of engagement elements

  all to press-spun profiles, these can

  be designed in the form of appropriately designed ribs

  on the scaffolding frame panel, exceeding

  external limiting surfaces, preferably of ner-

  triangular prismatic lines. They play, on the one hand, their role during stacking and contribute, on the other hand,

  by their form, with a carrying behavior, as a frac-

  moments of resistance, despite an advance distribution

  material tagger. Another mode of executing the

  stack engagement elements, which favors stacking: t Jur--

  all overlay and arrangement, provides that these

  these are formed by ribs extending beyond the main surfaces of the upper and lower sides of the lanyards.

  rons, so that at the lower sides, in the re-

  external gions, two support ribs are provided,

  preferably of semi-cylindrical shape, and that on the sides

* periorals is each time provided with a longitudinal rib, preferably in the form of a triangular prism, fitting into the free space of the lower ribs for supporting a spar located above, and the outer surface of which is each arranged a short distance from the plane

  vertical defined by the inner edge of the outer rib

  assistant support, or inward with clearance

  laterally to this plane. This constitution does not require

  an installation as precise and still ensures a good

  and gives rise to an advantageous distribution of material for manufacturing and the moment of resistance. The

  bottom walls of the side members may have reinforcements

  longitudinal cements protruding inwards.

  Thus, without too large accumulations of material hampering the manufacture, one obtains, as a result of the profiled shape

  an increase in the moment of resistance by accumulations

  matter in favorable places without increasing

notable weight.

  For the rational description of the invention,

  It is important that the fixing claws of the scaffolding frame panel are fixed to the metal profile connecting the side members. It is also possible, in another form, to define the invention by the fact that the frame panel

  scaffolding is formed by a metal frame, inside

  the front of which is arranged a walking and working surface

  designed in the form of a wooden covering, which is

  characterized by the fact that the frame rails, each connected at their ends by a metal cross member,

  are formed by hollow bodies with several edges,

  ference made of sheet steel, bounded by flat surfaces arranged perpendicularly or approximately

  perpendicularly between them. An essential combination

  the invention resides in the fact that it is a

  scaffolding frame panel having a metal frame

  that and a plate attached to it, forming a surface of

  walking and working, presenting the following peculiarities

  vantes: - the frame is made up of side members and crosspieces fixed at their ends,

  - the side members are formed of metallic hollow bodies tu-

  bulars with several edges, formed by walls of elongated edge shape, at least partially perpendicular to each other - the crosspieces are made of metal;

  - on the sleepers are provided arrangements for hanging

  expensive scaffolding frame panels, and characterized $ by the following:

  - the side members are formed from light metal profiles

  nis of housing means for the plate; - the sleepers are made of steel;

  - the sleepers and the side members are connected by ri-

vets;

  - the plate consists of a plate resting on the side

  also on the wings of the spars and riveted, moreover

without support.

  It can, moreover, be provided that the sleepers

  have riveted tabs at their ends

  dices, suitably engaging in the hollow tubes of the side members. The combination of spars formed from light metal profiles and crossbars formed from steel, which are

  riveted, and the riveting of the plate on corresponding wings

  are a combination of characteristics which,

  with an extremely simple assembly, presents large sta-

  bilities and good use value. In particular,

  elements can be assembled before riveting without forcing

  sea a firm frame and then rivet them. That means

  has a notable advantage for manufacturing.

  Exemplary embodiments of the invention are described below with reference to the drawings, in which: FIG. 1 is an oblique view of a scaffolding part with a scaffolding frame panel attached; FIG. 2 schematically shows in plan a first example of execution of a frame panel; Figure 3 is a cross-sectional view of a spar, on a significantly larger scale than on

Figure 2; -

  Figure 4 is a partial plan view of one end of a frame panel, on a larger scale; Figure 5 is a sectional view along line 5-5 of Figure 4;

  Figure 6 is a partial sectional view followed

  before line 6-6 of Figure 4; Figure 7 shows the detail A of Figure 6 on a larger scale roughly corresponding to Figure 3; Figure 8 is a plan view of a second embodiment of a frame panel; Figure 9 is a side elevational view of the frame panel according to Figure 8; Figure 10 is a schematic sectional view along line 10-10 of Figure 8; Figure 11 shows the left edge region of Figure 10 at a larger scale, but without the elements located behind the plane of the drawing: Figure 12 is a front elevation view

  partial of a corner joint, in the direction of the arrow-

  che 12 of Figure 8; Figure 13 is a partial elevational view of the corner assembly in the direction of arrow 13 of the

Figure 8; -

  FIG. 14 is a view1 corresponding to the figure

  gure 11, of two scaffolding frame panels stacked one on top of the other;

  Figure 15 is a view corresponding to the figure

  gure 14, of another example of execution of the form-of

  spun stringers, with two scaffold frame panels

  dage stacked one on top of the other, on a small scale

bigger.

  Figure 1 illustrates how a control panel

  dre of scaffolding 1, by its fixing lugs or molded hooks 5, is hooked to the U-shaped cross member 31 of a

  installation frame 30 of scaffolding. From the instal-

  only two vertical uprights are shown

  32 and the cross member 31 with the corner assembly tab 33.

  In the free wings of the U open down the tra-

  pour 31, you can hang the panel in the same way

  scaffolding frame 1 which follows.

  The scaffolding frame panel, the first of which

  mier example of execution is represented by FIGS. 2 to 7, is formed by frame 26, formed by side members 2 and

  crosspieces 4, and of the plate 3 connected to this frame, which

  me the walking and working surface and is called revê-

  wood, although it can be formed in different ways.

many suitable materials.

  Each of the side members 2 is formed of a body

  tubular hollow with several edges, including the sheet metal shell

  the steel 21 is closed by a weld 22 and which is made

  designed into a profile by means of a Turkish head formed of

  rollers suitably arranged, as shown in the figure

  re 2. This profile is made up of flat faces directed horizontally

  horizontally and vertically, connecting perpendicularly

  between them. Along the longitudinal side of the lanyard

  ron 2, outside relatively inside the frame, is

  provided, at its upper side, a raised step 23, such

  so that one obtains for the plate 3 an application surface 25 limited by this step. The elevation a is calculated so that after the positioning of the plate 3 (see FIG. 5), it exceeds the surface 3 ′ of

  this one, in 7, to a certain extent d (figure 7).

  The lower side of the side member 2 has a gra-

  din 24 of small height b directed downwards, turned towards the inside of the frame, which serves to prevent sliding

  side when stacking the frame panels together

  above the others, by the fact that it comes to be placed at a small distance next to the part of the upper step 3 which exceeds in a measure d; therefore, its width

  is calculated in such a way that during stacking / there is

  only between the two steps 23 and 24 of the superimposed frame panels 1, a small space c allowing stacking. The two longitudinal members 2 are connected to each of the

  two ends of the frame panel by a metal cross-piece

  lique 4 which can be formed, for example, by a U-shaped sheet steel and is fixed to the side members 2 by means

  a bent tab 13 and blind rivets 11 (Figure 7).

  Instead of a U-profile, you can also, for example,

use a rectangular tube.

  As plate 3, plywood and laminate wood are used, the latter always being inserted in such a way that the direction of the fibers is transverse to the longitudinal axis of the frame panel. In this way

  an additional stiffening of the cover panel is obtained

  dre. The plate 3 is fixed to the longitudinal members 2 by boron rivets

  genes 12 provided with spacings between them.

  On the crosspieces 4 provided at the ends of the frame panel are arranged the fixing studs or

hooks 5.

  There are also possibilities of execution deviating from the example shown. Thus, for example, the profile of the side members can be manufactured so that instead of a weld 22 it has an assembly by

  stapling which is then advantageously placed in the over-

  lower horizontal face of the profile. We can then use it

  read at the same time, thanks to the greater thickness of nma-

  the result of stapling, to absorb the large con-

  traction strap which appears, in load, in the part

lower of the side members.

  While the first example of execution each time showed two pieces formed of sheet metal and connected together, namely the side members 2 and the cross members 4, which are

  connected by several blind rivets 11 and 12, so

  particularly advantageous, in an appropriate angle assembly: i in use, the embodiment of Figures 8 to 14 shows, with similar crosspieces 4 provided with hooks

  or fixing studs 5, side members 42 which are -

  formed of light metal sections spun by the press and are connected at each angle to the crosspieces, also by

  advantageous and appropriate riveting medium.

  Similar parts bear the same reference-

  rences. Here - as in the first example of execution -,

  three fixing studs 5 are arranged on each track

  pours 4, preferably by welding. They are designed as hooks molded to a U-shaped profile and therefore have the desired stability. They are appropriately arranged, by welding, on the U-profile of the sleepers

  4, formed of bent steel sheets and open towards the interior

  of the panel, which would be more difficult

  ble in the case of light-spun metal profiles

  itself and would not offer such good strength properties

  than a sheet steel cross member. In the association of my-

  materials comprising sheet steel sleepers and

  light metal spun press spun and an assembly of

  a suitable rivet is a particular advantage of this

  example of execution of the invention.

  While the ties, apart from the constitution

  exact angled welding lugs 13, similar to that

  those of the first example of execution, the side members are not

  not only made of a different material, but present

  also try a different section profile, a common point

  to the two examples of execution being however the form tu-

  bular with walls perpendicular to each other, for the formation of a relatively elongated rectangle placed on edge. The profile is best visible from the figures

  11 and 14. The side members 42 have an outer wall 45

  created vertically, smooth, of equal thickness, and an interior vertical wall 46 which is also with a smooth surface, but shorter. They both end at the bottom at the same height and join the bottom wall 47

  by rounded angles. This wall is shaped conforming to

  even to their surfaces. Externally, it has two ribs 49 in the shape of a triangular prism, placed at a small distance from each other, while the region located inside the wall 47, between the ribs 49, is constituted by a reinforcement of wall playing the

  role of longitudinal rib 50. At the outer wall smooth

  45 is connected at the top, the upper frame wall

  51. It exceeds the vertical line 52 of the vertical wall 46 by the upper member wing 53, by half the depth 54 of the housing groove 55

  intended for the edge 56 of the plate 3. About a distance

  tance equal to the thickness D of the plate 3, under the wing 53 of the upper member, is formed the bearing wing

  horizontal 57 of the same length as the wing of frame

  lower. It joins at its end the groove limiting wing 58 which is connected in one piece to the wall

  51 of the upper chord 51, with inward shift

  térieur relative to the vertical wall 46. The housing groove 55, thus formed about half to

  inside and half outside the vertical line-

  the wall 52, allows to have, in its wing region located outside the profile in the direction of the interior of the plate frame, through the edge 56 of the plate, rivets, as illustrated in the sectional representations . The

  groove limiting walls also give good reason

  cornering of the entire profile and contribute to stability and the absence of torsion. The frame wall

  upper 51 has upper stacking ribs

  ge 62 adapted to the lower ribs 49 serving as an

  stack engagement elements and more specifically located outside of them, which also have a triangular prism shape. They can, as illustrated by the

  figure 14, engaging with each other during the em-

  pounding and prevent lateral sliding.

  The horizontal support wing 57 has on its inner side a retaining profile 63 which - as can be seen in the drawings - is formed in the manner of a profile

  sawtooth, the inclined sides being directed in such a way

  so that one can insert the plate 3 sideways and that it is well secured against removal. Consequently,

  a particularly good bond is created without further ad-

  juvants between edge 56 of the plate and spar 42.

  For the connection of the side members 42 and the crossings

  its 4, the latter present, for application surfaces

  cation possible, different riveting tabs. The paw

  of riveting 65 placed vertically is provided for the connection

  its with the outer wall 45, the lower riveting tab

  reure 66 for the connection in the region of the long rib

  inner longitudinal 50, and the upper transverse leg

  re 67 for the connection with the upper chord wall 51. The region around the housing groove is offset downwards on the cross member and can also be provided with a riveting wing 68. This offset is useful to allow continuous application of the plate 3 in its marginal region, because the crosspieces 4 are aligned by

  their upper application walls 69 on the wing

  horizontal guard 57 or the retaining profile 63, as illustrated in FIG. 12. The riveting wings 65, 66 and 67 are therefore bent in a manner adapted to the profile of the spar 42 and inserted therein from the front side. The inner vertical wall 46 of the beam 42 can be hollowed out in a corresponding manner to allow the wings to penetrate. For

  the horizontal connection is each time provided with a rivet

  gene 70 which is each time placed between the ribs 49 and 62 and is housed in a well-centered manner by the spacing of

  these. The connections with the side walls are reali-

  blind rivets 71. A rivet 72, at the corner,

  binds the plate and the two profiled parts. So is it

  se an advantageous corner joint, stiffened in several directions, which is free of constraints and therefore designed so as not to twist the entire frame panel

  scaffolding, but which can perfectly absorb the ef-

  corner forces that occur in service when fleeing

  xion. The profile of the side members 42 is advantageously manufactured

  qué aluminum press spun and simply brought to the desired size by cutting, while the sleepers can be formed by bending sheet metal ies machine

  automatic forming. We then galvanize them, advantageously

  at the same time as the fixing studs 5. By riveting, the advantageous combination of materials, which makes the two parts stainless, is possible. The openings at the corner allow the water possibly

  arrival in the profile to flow. By the exclusive riveting

  sif in the region of the angles and more precisely using

  blind rivets and the removal of other spacers--

  cross sections, we can obtain a particular mounting

  rely advantageous by sliding the side members on the plate 3,

  so that a recess in the housing groove equi-

  sawtooth retainer 63 can be done

  securely. So we push the sleepers 4 in the long

  and we push them, with the top wall of appli-

  cation 69, under plate 3. Then only riveting takes place. As a result, the assembly is notably simpler than when a complete frame is prefabricated, for example by welding, and that the plate must then be arranged. We can no longer push it practically into grooves

  directed longitudinally, if you want it to be placed there

  rigidly created. This is possible with the second example of execution described below. We then manufacture quickly,

  economically and with a high-quality corner joint

  bed, a flat scaffolding frame panel free from torsion. In the embodiment described above, the triangular prism-shaped ribs 49 are placed, as stack engagement elements of the spar 42 each time higher, between the stacking ribs 62 formed on

  the upper side of the lower spar.

  In the example of execution shown in the figure

  gure 15, on the longitudinal members 82 formed from light metal profile extruded to the press are provided, on the lower side,

  application ribs 83 roughly half-cylinder shaped

  dre that exceed them down. They reach the

  outer wall 45 and the inner vertical wall 46.

  The inner limiting wall 84 of the app rib -

  outer cation 83.1 determines a vertical plane 85. On

  the upper side 86 is only formed a long rib

  gitudinal 87 in the shape of a triangular prism, while the rest of the surface is smooth up to the upper member wing 53. The longitudinal rib in the shape of a prism

  triangular 87 has an outer surface 87.1. That-

  this is placed, with a little clearance or spacing, inside

  laughing at the vertical plane 85. As a result, we obtain - as shown in FIG. 15 - a good centering of scaffolding frame panels stacked one on the other, each side

  of the scaffolding frame panel being fixed against the cou-

  lateral smoothing in one direction. As a result, we can

  slide sideways and align the pan-

  scaffolding frame loops in slightly raised condition on one side. In addition, the shape of the profile and other parts of the scaffolding frame panel as well as the

  links are similar or similar to the examples of exe

cution described above.

  When forming beams, instead of metal

  light, you can also choose another material suitable for

  press, but, in particular, we can also give

  roughly the profile of the second or third exemplary embodiment, that is to say by forming a groove, on a sheet metal box section intended for the longitudinal members

  housing for the edge 56 of the plate 3, so that it

  it is well enclosed and protected against damage to the edges

  your. The plate can be made from the same materials as in the first embodiment, but also from profiled sheet metal or light steel. The particular advantage of all three exemplary embodiments is that the plate is only clamped at its edges and does not rest. Frames are stable enough to resist bending, rotation and buckling, even for large ones

  lengths, without being stiffened in intermediate regions

  res. A sufficiently thick plate 3 can be freely clamped between the edges which absorb the forces which occur. In case of damage, it can easily be changed, which is important for prolonged use and on high-value frames, since excessive localized forces make the plate only unusable, but not all of it.

scaffolding panel.

Claims (23)

R E V E N D I C A T I O N S   1. Scaffolding frame panel (1) provided with a metal frame (26) formed of side members (2, 42, 82) and crosspieces (4) and a plate (3) fixed to the frame and forming a walking and working surface (3 '), characterized by the following points: - the frame (26) is formed of side members (2, 42, 82) and crosspieces (4) fixed at their ends;   the longitudinal members (2, 42, 82) are formed of tubular hollow bodies metals of metal;   - the metal hollow bodies are limited at least in part   tied by flat surfaces of their walls (21,45,46,47,51),   arranged perpendicularly or approximately perpendicularly   between them and have several edges - the crosspieces (4) are formed of metal; - the sleepers (4) are connected to the side members (2, 42, 82) by rivets (11, 12, 70, 71, 72);   - the sleepers (4) have at their ends pat-   angled riveting pins (13, 65, 66, 67, 68) fittingly engage in the hollow tubes of the side members (2.42, 82);   - on the sleepers (4) are provided arrangements (5) for   the attachment of the scaffolding frame panel.   2. Panel according to claim 1, characterized in that the side members (42, 82) are formed of profiles in light metal.   3. Panel according to claim 1, characterized in that the side members (2) are formed of folded metal sheet.   4. Panel according to any one of the claims.   1 to 3, characterized in that the crosspieces (4) are designed in the form of U-shaped profiles made of folded sheet metal, open towards the inside of the panel, with the tabs   riveting suitably bent (13, 65 ...) and cros-   welded chets or crampons (5), molded to a U-shaped profile. 5. Panel according to claim 1, characterized in that the two ends of the side members (2,42, 82) are interconnected by cross members designed in the form of rectangular tubes.   6. Panel according to claim the aractei cn cE quc the plate (?) Is made of plywood and   fixed by means of rivets (12) ru metal frame (26).   7. Panel according to any one of the claims.   cations 1 and 6, characterized in that the direction of the fil-   bres or the profile direction of the plate (3) is trans-   transverse to the longitudinal axis of the frame panels.   8. Panel according to any one of the claims.   tions 6 and 7, characterized in that the surface of the plywood plate (3), freely enclosed at the edges and   possibly glued in a way that resists boiling-   tion, is provided with a layer of synthetic material lie.   9. Panel according to any one of the claims.   cations 1, 6 and 7, characterized in that the plate (3), de-   provided with support, is only connected to the metal frame   that (26; 42, 82; 4) at its longitudinal edges and possibly-   Lement rests on the crosspieces (4) or is inserted.   10. Panel according to claim 2, character-   in that the longitudinal members (42, 82) formed of tubular hollow bodies are formed by a light metal profile (42, 82), designed in a stable form with respect to bending, rotation and buckling on long lengths without transverse bracing, connected to the plate (3), and which has, in the region of the upper chord (51), a housing groove (55) open inwards for the plate (3).   11. Panel according to claim 10, charac-   in that the housing groove (55) is formed between an upper chord wing (53) extending beyond the line   vertical wall interior (52) and a supporting wing ho-   rice (57) offset downward from the previous   tooth with a spacing equal to the thickness (D) and a groove limiting wing (58) offset inwardly relative to the vertical inner wall (46) and which is   formed on an otherwise rectangular light metal profile elongated bed, placed on edge.   12. Panel according to claim 1], character-   risé in that the horizontal support wing (57) is provided, at least in the anterior region, with a retaining profile (63), preferably with an inclined sawtooth profile in the driving direction.   13. Panel according to claim 1, character-   in that the upper and lower sides of the lanyards   rons (2, 42, 82) present engagement elements of   pile adapting between them, directed longitudinally.   14. Panel according to claim 13, character-   that the stack engaging elements are con-   designed as folded steps of the sheet metal profile-   lique (21), with inclusion of the thickness of the plate riveted (3).   15. Panel according to claim 14, character-   in that the upper side of the side members (2) has a step (23) located along the side member and raised on the outside of the frame, so that on the side   inside the frame, there is an overlay for the plate (3)   bearing face (25) limited by this step.   16. Panel according to claim 15, character-   risé in that the elevation (a) of the step (23) directed longitudinally on the upper side of the side members (2) is so large that the step (23) exceeds in a certain   measure (d) the surface (3 ') of the plate (3).   17. Panel according to claim 16, character-   laughed in that the lower side of the side members present on   the inner side of the frame a step (24) directed longitudi-   nally, turned downwards, of small height (b), of which   the width is calculated so that when stacking   scaffolding frame panels, it just sits   cer with a small space (c) next to the inner side   the step (23) provided on the upper side.   18. Panel according to claim 13, character-   that the stack engaging elements are con-   designed in the form of ribs (49, 62; 83, 87), preferably   rence of triangular prism ribs, suitably spaced on the scaffolding frame panel and protruding   the outer beam limiting surfaces (42,82).   19. Panel according to claim 13, character-   laughed in that the stack engaging elements are formed   més by ribs (83,87) exceeding the higher sides   and lower side members (82), so that at the sides   lower tees are provided, in external regions, two support ribs (83.1, 83.2) preferably of shape   semi-cylindrical, and in that on each of the upper sides   laughers (86) is provided a longitudinal rib (87), preferably in the form of a triangular prism, fitting in the free space of the lower support ribs (82) of a spar (82) located above, projecting beyond the respective upper side (86) and the outer surface (87.1) of which is arranged a small distance (with play) inwards   relative to the vertical plane (85) defined by the edge   (84) of the adjoining external support rib (83.1).   20. Panel according to claim 2, character-   rised in that the bottom walls (47) of the side members (42, 82) have longitudinal reinforcements (50) making protruding inward.   21. Panel according to any one of the claims   cations 1 and 5, characterized in that the fixing claws   tion (5) of the panel are fixed to the metal profile (4) connecting the side members (2).   22. Scaffolding frame panel (1) presented   both a metal frame (26) and a plate (3) fixed thereto, forming a walking and working surface (31), having the following particularities: - the frame is formed of side members (42, 82) and of sleepers (4) fixed at their ends;   - the side members (42, 82) are formed of metal hollow bodies -   tubular liques with several edges, formed by walls   elongated song shape, at least partially perpetual   dicular between them; - the crosspieces (4) are made of metal; - on the sleepers (4) are provided arrangements (5) for   hang the scaffolding frame panels (l), and charac-   verified by the following points: - the side members (42, 82) are formed from light metal sections provided with housing means (55) for the plate (3); - the crosspieces (4) are made of steel; - the sleepers (4) and the side members (42) are connected by rivets (70, 71, 72); - the plate (3) is constituted by a plate (3) resting   laterally on the wings (57) of the longitudinal members (42) and ri-   dressed, otherwise devoid of support.   23. Panel according to claim 22, character-   in that the crosspieces (4) have at their ends   half of the riveting tabs (13; 65, 66, 67, 68) bent   suitably engaging in the hollow tubes of the long gerons (2, 42, 82).