FR2689549A1 - Ceiling formwork device. - Google Patents

Abstract

Device for formwork of ceilings comprising a support head with a flat contact surface directed at right angles to the longitudinal support axis, for a contact profile, characterized in that the support head (10) has an undercut groove (11), approximately C-shaped in cross section, the groove bottom forming a contact surface (13) and the edges delimiting two opposite and parallel stop surfaces (14, 15), from each of which, at a distance above the stop surface (13) protrude hooking rods (16, 17) facing one another.

Description

i The invention relates to a device for formwork ceilings

  comprising, for a contact profile, a bearing head with a planar contact surface directed at an angle

  straight with respect to the longitudinal support axis.

  In particular for the manufacture of a concrete ceiling, supports are necessary on which parts

  formwork are maintained at the required ceiling height.

  For wooden joist beams in a ceiling formwork, the support head has a profile approximately in

  U-shaped, which surrounds a wooden joist on three sides.

  This simple shape of the support head is designed for contact profiles of rectangular cross section, but cannot exploit the advantages of modern contact profiles which have an L-shaped hooking edge. object of providing a device of the type mentioned, which also allows to take advantage of

  advantages of modern contact profiles.

  The problem is solved by the fact that the support head has an undercut groove, of cross section approximately C-shaped, the bottom of the groove then forming the contact surface and the edges of the

  groove with two opposite stop surfaces and parallel

  lels, from each of which, at a distance above the stop surface, protrude hooking flanges

facing each other.

  Due to the undercut groove, a modern contact profile with its L-shaped hooking edge can be placed on the support head so that the

  snap edge is blocked in the event of involuntary removal.

  Another embodiment provides that the support head has two lateral recesses which reach the groove by opposite faces, each lateral recess forming plane faces which are parallel opposite and oriented.

  perpendicular to the stop surfaces, each inter-

  broken by the lateral recess In the present case, a support head can hold, in the common angular zone, four elements of formwork panels, which are each framed by the contact profiles, the lateral recesses here allowing the tilting movement of the formwork panel elements for attachment and detachment In the position of installation, so when the formwork panel elements lie horizontally, they are each locked by the common support head , so that a platform can be installed without nails or the like

very stable.

  Advantageously, it is expected that the gap

  between the opposite planar faces is the same as the spacing between the opposite stop surfaces, when uniform contact profiles are to be used for all

the edges of panels.

  In order to allow sufficient internal pivoting of the internal contact profiles for hooking and unhooking shuttering panel elements, it is provided that the lateral recesses, seen in the direction of the longitudinal support axis, extend at least once the depth of the groove undercut below the level of

the contact surface.

  The fact that in the middle of the groove there is provided a rod raised upward perpendicular to the contact surface, which has two guide surfaces

  planes, extending parallel to the longitudinal axis of ap-

  pui, guarantees locking on even a single element of formwork panels, since its contact profile, in a hooked position and tilted upwards, is prevented, by the rod, from slipping from the locking position Ce Position locking between the contact profile and the support head is advantageous when assembling a ceiling formwork, since the support head is not fixed in its position only when the four elements of formwork rests on it It is also advantageous when in the peripheral areas of a ceiling formwork one can also not hang, despite everything

  reliably, that two elements of formwork panels.

  One embodiment, in which the rod is interrupted in the middle zone so as to form two partial rods, makes the use of the support head universal, since a U-shaped housing is provided between the partial rods. receive traditional wooden joists The reception area is optimally exploited because the distance between the partial strips corresponds at least to the spacing between the faces

opposite plates.

  The support head has a fairly expensive shape, so that it is more advantageous from the point of view of the manufacturing technique, to manufacture this support head

  separately from the support of a certain length, approxima-

  tively as a casting It is then practical to be able to subsequently establish the connection with the support since there is provided, at an axial distance under the support head, a flange plate, which is fixedly connected to the latter and which is oriented perpendicular to the longitudinal support axis The flange plate also allows application also against the front surface of a wooden joist,

  as well as all kinds of other supports.

  The embodiment, the design of which is symmetrically reflected with regard to a first plane of symmetry extending parallel to the middle of the groove and towards the longitudinal support axis and a second perpendicular plane extending in direction of the longitudinal axis of support, has technical manufacturing advantages, the use is also simplified since there is no need to take the position of the support head too much into consideration. The contact profile must be functionally modified so that the hooking collar is actively movable at least partially in the spirit of a locking function. It is therefore guaranteed that the two contact profiles to be put in place. two sides of the flange can be butted directly to each other above the flange and form a ceiling formwork

practically seamless.

  Various other features of the invention

  moreover emerge from the detailed description which follows.

  Embodiments of the subject of the invention are shown, by way of nonlimiting examples, in

attached drawings.

  Fig I shows, in top view, a support head

according to the invention.

  Fig 2 is a sectional representation from the

plan 2-2 of fig 1.

  Fig 3 is an angular section of an element of

formwork panels.

  Fig 4 is similar to fig 2 for a second

  example of achievement seen in perspective.

  Fig 5 is a perspective view from right to

fig 4.

  Fig 6 is a perspective view from above of the

fig 5.

  Fig 7 is a partial schematic view and

  interrupted from the upper right area of fig 4.

  The support head 10 has, in accordance with FIG. 1, a quadrangular contour with beveled angles It

  has a groove 11 in crosscut undercut

  dirty C-shaped, the bottom of which forms a flat contact surface 13 and oriented perpendicularly to a longitudinal support axis 12 The edges of the groove constitute two stop surfaces 14, 15 parallel opposite, from which release, at a distance above the contact surface 13, from the protruding hooks or flanges 16, 17 The stop surfaces 14, 15 can, from the contact surface 13, rise upwards in having an arcuate rounded shape and transforming into edges or hooking strips 16, 17 also rounded. The surface 18 of the support head, in which the groove 11 is located, extends, generally, flat parallel in a

  plane, at a distance above the contact surface 13.

  From the opposite faces, two lateral recesses

  rails 19, 20 extend into the groove 11, which forms on one side of the groove 11, two aligned hook parts 21, 22 and, on the other side, also two hook parts

23, 24 aligned.

  The lateral recess 19 forms two flat faces 25, 26 parallel, opposite and oriented perpendicular to the stop surface 14, and the distance which separates them is equal to the spacing between the stop surfaces 14, 15 The wall of internal delimitation 27 extends parallel between the longitudinal support axis 12 and the stop surface 14 In the example, the delimitation wall 27 delimits a central base 28, which goes from the support head 10 to 'to a plate

  flanges 29 oriented parallel to the distance therefrom.

  The opposite lateral recess 20 has an inverted shape and delimits two parallel opposite flat faces 31, 32 and an internal delimitation wall 33 by the base 28. On both sides of the lateral recesses 19, 20 are

  formed against struts, whose internal surfaces turn

  born towards each other become, each, in a way

  flat, the flat faces 25, 26, 31, 32.

  Due to the position of the cutting plane, only one of the four struts in total is visible and is designated by the reference numeral 34. It extends from

  the support head 10 to the flange plate 29.

  In the axial height of the stop surface 15, the flat face 31 extends horizontally, approximately as far as the stop surface 15, but it does, however, form an angle of 90 ′. angles between the flat face 32 and the stop surface 15 as well as between the stop surface 14 and the face

plate 25, respectively 26.

  For reasons of weight saving, the thickness of material in the angular zones of the support head 10 is reduced, so that each time four L-shaped ribs emerge from the plane of the contact surface , upwards, the support head 10 having, here seen from above, an approximate shape in H. A rod in the middle of the groove 11 is arranged and is interrupted, preferably in the middle zone of

  so as to produce two aligned partial rods 36, 37.

  They each comprise two guide surfaces 38, 39, respectively 41, 42, flat, oriented parallel to the stop surface 14 and to the longitudinal support axis 12, as well as internal surfaces facing one the other 43, 44, the distance between them is the same, or a little more, than for the flat faces 25, 26 The partial rods 36, 37 stand, axially upwards, above the surface stop 13, about two to three times the depth

throat 11.

  The flange plate 29 has a series of holes made beforehand, not shown, in order to be able to be mounted without problem on joists or tubular supports. To illustrate the use of the support head 10, it is first necessary to mention the situation in the angular zone

  of an element of formwork panels using fig 3.

  A formwork panel element 45 firstly comprises a generally rectangular formwork panel (which here is not visible), which is framed on its four lateral edges, by a contact profile 46 It is preferably used everywhere the same contact profile The contact profile 46 is designed, for example, by a hollow extruded aluminum profile, the internal structure of which does not matter here. What is decisive is that its catching edge lower is shaped as L. Thus, a hooking edge 47 extends, along a plate edge, hooking edge which has a surface

  lower 48 parallel to the plane of the plate, a counter

  stop surface 49 directed from the edge inward

  laughing, and an external surface 50 directed towards the outside, which is oriented perpendicular to the plane of the plate The external surface 50 is continued, by a bearing 51, in a

  lateral surface 52 projecting outwards.

  Along the other edge of the plate extending at a right angle, there is a hooking edge 53 of identical shape having the lower surface 54, the stop counter surface 55, the external surface 56, the bearing 57 and the surface

lateral 58.

  The situation at the other edges of the plate is ana-

  logue, so due to the similarity, the only catch in

  account of a plate angle is sufficient for understanding

if we.

  The attachment of the formwork panel element 45 is illustrated in fig 2, the initial state being shown here.

  by solid lines and the state of operation in dotted lines

  It is understood that the schematic representation is simplified and the hooking edge 53 disposed in the plane of the drawing is evoked only by a double dotted line. In the initial state, the fastening edge 47 is located under the fastening flange 16, while the edge

  hook 53 plunges into the lateral recess 19 (fig 1).

  The latter is therefore necessary to allow hooking in an oblique position When the formwork panel element 45 is tilted upwards in the formwork position, the lower surface 48 is supported largely on the contact surface 13, the counter contact surface 49 against the stop surface 14 and the external surface 50 against the guide surface 39 Between these surfaces, there is of course a slight clearance in order to avoid blocking. The stop counter surface 55 of the another hooking edge 53 is applied against the flat face 25 (fig 1) Thus the relative position relative to the support head 10 is already ensured for the

  first formwork element 45, so that the edge

  chage 47 remains reliably under the flange

  spitting 16 thus excluding the risk of a stall

  involuntary and therefore a risk of accident.

  Similarly, it is possible to hang the other elements of formwork panels which rest, then in a planar manner, by their lateral surface 52, 58, one against the other, the separation joints between them take, seen from above, the shape of a cross To do this, the width of the bearing 51, 57 is adjusted so that the separation joint is sufficiently narrow so as not to leave

practically pass concrete.

  In the case of the previous figure, the support is in the angular zone common to the four elements of formwork panels. The support can, of course, also be placed between the angles of a elements of formwork panels. In this case, the hooking edge 47 rests, for example, behind the two aligned hook parts 21, 22 (fig 1), the other hooking edge 53 then extending anywhere laterally next to the head support 10 and, for hooking, not being for this reason in the area of the edge recess 19 If necessary,

  this fact, only design supports for such applications.

  tions, we could remove the side recesses 19, 20.

  But it is obvious that these lateral recesses

  increase the universality of the supports.

  In the second example of embodiment according to FIGS 4-7, four locking parts 59, 61, 62, 63 are provided. These serve to cover the hooking edge 47, when the element of formwork panels 45 has taken the position drawn in dotted lines in FIG. 2 Compared to the first embodiment, the hooking strips 16, 17 have been shortened a little so as not to go as far into the corresponding groove 11 and so as to provide simply a shorter bulge 64, 66 oriented inwards The stop surfaces 14, 15 as well as the

  stop surfaces 13 are the same The locking parts

  lage 59, 61, 62, 63 can approach and move away from the median plane of symmetry 67 The longitudinal support axis 12 is

also found in the latter.

  So that the locking parts 59, 61, 62, 63 can move in this way, the hook parts 21,

  22, 23, 24 are provided with passages, on both sides, suitable for

  ximatively in the middle zone As the symmetry of the planes plays an important role in this device, we will discuss below in more detail only the configuration in the zone of the locking parts 59, 61, the configuration in the zone of the locking parts 62, 63, then self-evident In accordance with FIGS. 5 and 6, the locking wall 22, 24 is provided, approximately in the median zone, with a recess 68, 69 which extends perpendicular to the median plane 67 The recess is two to three times wider than the locking pieces 59, 61, which are made of heavy plate and which have, in the embodiment, a thickness of 5 mm Of course, in this case, the bulges 64, 66 are also divided into an area further

  outside and in an area further inside.

  Each recess 68, 69 continues downwards in a horizontal transverse recess with open edge 71, 72, which goes, from the oblique edges 73, 74 (here with open edge), beyond the hooked portions 22, 23 , to the bottom 76, 77 of the groove 11 The internal edge 78, 79 serves here as a stop for the internal edge of the neck 80, 82 of the locking pieces 59, 61, so that between the guide surfaces 41, 42 and the nose directed inwards 83, 84, there remains a space which allows the fastening edge 47 to be able to penetrate there, when the element of formwork panels 45 is a little more horizontal than the as shown in fig 2 The locking pieces 59, 61 have outwardly and above the noses 83, 84, a sliding flank 86, 87, so that the hooking edge 47 comes more easily into

throat 11.

  In accordance with FIG. 7, the nose 84 is continued towards the outside by a flank 89, which is located, relative to the upper face 91 of the hooking edge 47 in an angular self-locking zone. In the exemplary embodiment shown, the upper face 91 is, in cross section, slightly curved The sidewall 89 can also be provided descending because the self-locking angle is of the order of a few degrees In the locked state, the edge 88 of the neck aligns approximately with the stop surface 14, it is therefore outside the groove 11, and the locking piece 61 is only partially directed towards the inside of the groove 11 The locking piece 61 is continues downwards through the neck 82, which crosses the bottom 77 and has a butterfly wing enlargement 93 in the form of a sector at the bottom to the left This enlargement has, in the median plane 67, a bore, which is crossed by a cylindrical axis 94, which is read i even in the plane

median 67, horizontal.

  The mass, which is on the right of the median plane 67, is considerably smaller than that of the wing forming a counterweight 96 on the left, and which widens into a butterfly wing; this allows a pivoting movement of 30 degrees from this structure The end of travel of the pivoting movement is reached, when an edge 97 of

  the wing 96 strikes the lower face 99 of the counter

triangular reinforcement plug.

he

  In accordance with figs 4 and 5, the counter wings

  weights 101, 102 of the locking pieces 59, 62 are connected

  between them, in their lower angular zone through the

  medial of a transverse bar (103) and welds 104.

  Each crossbar 103 increases the counterweight and, in addition, the locking pieces 59 can be tilted,

  62 out of the groove 11, by lifting the transverse bar

  dirty 103 Of course, such a crossbar can also be provided for the locking parts 61, 63. The counterweight wing 101 pivots about the same cylindrical axis 94 It is best to make the locking parts with the neck, the widening and wing of

  counterweight, in heavy sheet metal in one piece.

  After the very detailed description of these parts,

  the layout and shape of the other rooms are self-evident.

  In the operation of the second example of reali-

  sation, we keep the formwork panel element 45 more flat than that shown in fig 2, we lower

  the hooking edge 47 and thus pushing the piece of glass

  rusting 61 outwards which brings the wing against

  weight 96 to be lifted Next, the pan element is brought

  formwork 45 in the position drawn in dotted lines in FIG. 2, the counterweight wing 96 then lowers and the locking piece 61 switches to the position shown in the

fig 7.

  In the embodiment shown, four locking parts 59, 61, 62, 63 are provided, and this at each of the locations drawn, because the support head must be able to carry four elements of adjoining formwork panels, with the edges facing forward in fig 3

  are each above point 106 in fig 6.

  In the second embodiment, the bulges 64, 65 can also be completely eliminated With the locking pieces 59, 61, 62, 63 on

  has, so to speak, replaced the hanging rods

  sives 16 17, by active hooking strips, the sides of which 89 during operation have the same action as

  the hooking strips of the first embodiment.

  The advantage of the second example of embodiment consists

  in the fact that one can enter the throat 11, when the element

  formwork panels 45 is in a horizontal position the pivoting movement according to fig 2 is therefore not necessary First of all, we can start the formwork at any place by unlocking the locking parts 59, 61, 62, 63 With the other systems, formwork can only be started in one place. During formwork, if the formwork panel element 45 is folded down,

  it still remains attached to the support head 10.

Claims (33)

  1 Device for formwork of compressed ceilings   nant a support head with planar contact surface directed at right angles to the longitudinal support axis, for a contact profile, characterized in that the support head   (10) has an undercut groove (11), approxi-   matively C-shaped in cross section, the bottom of   groove forming a contact surface (13) and the edges   using two opposite and parallel stop surfaces (14, 15), from each of which, at a distance above the stop surface (13), protrude hooking strips   (16, 17) facing each other.   2 Device according to claim 1, characterized in that the support head (10) has two recesses   lateral (19, 20) which reach into the groove in counter   skin (11) by opposite faces, each recess   side with flat faces (25, 26, 31, 32) parallel   opposite and oriented perpendicular to the stop surface (14, 15) and each interrupted by the lateral recess.   3 Device according to claim 2, characterized in that the spacing between the opposite flat faces (25, 26, 31, 32) is identical to the spacing between the surfaces opposite judgments (14, 15).   4 Device according to claim 2, characterized in that the lateral recesses (19, 20), seen in the direction of the longitudinal support axis (12), extend over at least once the depth of the groove against - undercut (11)   below the level of the contact surface (13).   5 Device according to one of the preceding claims -   teeth, characterized in that in the middle of the groove (11), there is provided a rod (36, 37) erected upward perpendicular to the contact surface (13) and which has two flat guide surfaces (38, 39, 40, 41)   extending parallel to the longitudinal support axis (12).   6 Device according to claim 5, characterized in that the rod is interrupted in the middle zone of   so as to form two partial rods (36, 37).   7 Device according to claim 3 or 6, charac-   terized in that the distance between the partial rods (36, 37) corresponds at least to the spacing between the faces opposite planes (25, 26, 31, 32).   8 Device according to claim 1, characterized in that there is provided, at an axial distance under the support head (10), a flange plate (29), which is fixedly connected to the latter and which is oriented perpendicularly to the longitudinal support axis (12).   9 Device according to one of the preceding claims -   teeth, characterized in that the design is symmetrical with respect to a first plane of symmetry extending parallel to the middle of the groove (11) and in the direction of   the longitudinal support axis (12) and a second plane perpendicular   cular extending in the direction of the longitudinal support axis (12).   10 Device according to claim 1, characterized in that the attachment flange (16, 17) is at least   partially movable and has a locking function.   11 Device according to claim 1, characterized in that a locking part (59, 61, 62, 63) of the attachment flange (16, 17) can be pushed out of the groove (11) under a force and be reintroduced into the groove (11) by this force.   12 Device according to claim 11, character-   risé in that the locking piece of the latching flange is guided on the support head by a guide device and this both in the input movement as in the exit movement.   13 Device according to claim 12, character-   laughed in that the locking part of the fastening flange is shorter than the fastening flange itself.   14 Device according to claim 13, character-   laughed in that the locking piece is considerably narrower than the length of the hooking collar.   Device according to claim 11, character-   laughed in that this locking piece can be pushed back at least in part, preferably completely, out of the throat.   16 Device according to claim 14, character-   laughed in that the locking piece has a certain thickness of sheet metal and is preferably made of strong sheet metal.   17 Device according to claim 11, character-   risked that the locking piece interrupts the hanging rod.   18 Device according to claim 17, character-   risked that the locking piece interrupts the   hanging rod approximately in the middle zone.   19 Device according to claim 17, character-   laughed at in that there is provided, for the locking piece, a   recess in the hanging rod.   Device according to claim 12, character-   laughed in that the locking piece is connected by a neck to a force accumulator, the neck also having here   a stop surface corresponding to the stop surfaces.   21 Device according to claim 20, character-   laughed in that, when the contact profile is not in place, the collar stop surface penetrates further into the   groove only when the contact profile is put in place.   22 Device according to claim 20, character-   laughed in that, for the collar, there is also provided a   recess in the throat for its freedom of movement.   23 Device according to claim 20, character-   laughed at in that the force accumulator is an accumulator of force of gravity.   24 Device according to claim 23, character-   rised in that the gravity accumulator comprises a counterweight, which lifts around a common pivot axis, when the locking piece is pushed outwards and the neck is connected to a counterweight by   through a collar extension.   25 Device according to claim 23, character-   laughed at that the gravity force accumulator is provided   between a foot of the device in a space under the throat.   26 Device according to claim 24, character-   risé in that the pivot axis extends in the longitudinal direction of the groove, preferably below the latter.   27 Device according to claim 20, character-   laughed in that the neck, the neck extension and the locking piece are cut from a single sheet, at the   less substantially flat.   28 Device according to claim 1, characterized in that the locking part has on its face upper a sliding edge.   29 Device according to claim 1, characterized in that the locking piece has on its underside a side which has a self-locking position in its locked position.   Device according to claim 1, characterized in that the locking piece is resistant to bending.   31 Device according to claim 1, characterized in that, for each groove, there is provided a locking piece. 32 Device according to claim 1, characterized in that, for four partial grooves, there is provided a   locking piece for each partial groove.   33 Device according to claim 12 and 32, characterized in that a common guide device is provided for each pair of partial grooves.   34 Device according to claim 24, charac-   terized in that the counterweight of a locking piece is located under the partial groove of the opposite locking piece.   35 Device according to claim 34, character-   laughed at in that the counterweights have, seen in the longitudinal direction of the pivot axis, a shape in butterfly wings.   36 Device according to claim 24, character-   laughed at in that the locking piece, the neck and the counterweight have at least approximately the same   contour and preferably an identical contour.   37 Device according to claim 34, character-   laughed at in that each time two locking pieces on the same side are connected together by a bar   joint actuator extending lengthwise.