EP2145061B1 - Ceiling joist formwork with automatic stripping of the inner board - Google Patents

Abstract

The invention relates to a ceiling joist formwork system (1) comprising a ceiling table (2), a vertical support (6), an inner board (3), a ceiling joist base (4), and an outer board (5), the outer board (5) and the ceiling joist base (4) being interconnected, especially rigidly interconnected. The vertical support (6) is rigidly fixed to the ceiling table (2), and the ceiling joist base (4) is fixed to the vertical support. The system according to the invention is characterised in that the ceiling joist base (4) and the outer board (5) are rotatably mounted about a first articulated point (GP1) on the vertical support (6), a guide (7) is rigidly fixed to the inner board (3), the inner board (3) and the guide (7) are rotatably mounted about a second articulated point (GP2) on the ceiling joist base (4), and the inner board (3) is guided by means of an edge (14a, 14b) in relation to the ceiling table (2) along a direction comprising at least one component vertical to the formwork upper plane of the inner board (3). The ceiling joist formwork system according to the invention can be used to simplify the dismantling, especially of the inner board, and the risk of damage to the inner board is reduced.

Description

The invention relates to a joist formwork system comprising a slab table, a suspension, an inner shield, a lower floor and an outer shield,
wherein the outer shield and the lower floor are connected to each other, in particular rigidly connected to each other,
wherein the suspension is fixed rigidly to the ceiling table,
and wherein the lower floor is attached to the suspension.

Such a beam formwork system has become known by the company publication " User Information Dokamatic Table ", company Doka Industrie GmbH, Amstetten, Austria, 12/2005, page 30-31 ,

With formwork technology almost any structures, in particular walls and ceilings of buildings, can be made of concrete. Initially, a space is defined laterally and downwards in which the structure is to be formed (shells); For this purpose, formwork elements are used. Subsequently, the limited space is filled with liquid ketone. After hardening of the concrete, the formwork elements are removed (stripping), and the finished structure made of concrete can be used or further processed.

For many modern buildings, concrete ceilings and pillars are mainly made of concrete. The ceilings are provided with steel reinforcements to absorb the loads that occur. The thickness of the ceiling depends on the load and the desired span.

In order to reduce the thickness of the ceiling and thus the amount of concrete to be installed, it is known to provide ceilings with joists. A joist is a steel-reinforced concrete beam that runs below the ceiling and is suitable for distributing loads or transferring them to buttresses or load-bearing walls. A typical joist represents a structure that hangs from the ceiling panel at the edge of a ceiling.

For the manufacture of a beam a joist formwork system is required. The beam itself is limited by the formwork skins of an inner shield, a Unterzugbodens and an outer shield. The formwork skin of the inner shield closes directly to the formwork of a ceiling table.

From the company publication "User Information Dokamatic table" is a "edge table with beam" has become known. On a ceiling table is one

Tie bar fastened rigidly to which an inner shield is rigidly attached. Also rigidly attached to the lower shackle is a horizontal bar on which in turn rigidly a bottom floor and hinged an outside shield are attached.

In this known beam formwork system stripping of the inner shield is usually carried out in that the ceiling table with which the inner shield is rigidly connected, is lowered. As a result, at the same time the inner shield of the manufactured concrete wall of the substructure is torn. This is associated with a considerable constraint on the inner shield, so that the inner shield can be deformed or otherwise damaged. As a result, the inner shield must be frequently repaired or replaced. In order to avoid damage to the inner shield, the inner shield would first have to be separated from the ceiling table and turned off separately in the known beam formwork system, but this is quite cumbersome and labor-intensive.

Object of the invention

It is the object of the present invention to provide a Unterzugschalungssystem available, in which a stripping, in particular of the inner shield, in a simple manner possible and the risk of damage to the inner shield is reduced.

Brief description of the invention

This object is achieved by a Unterzugschalungssystem of the aforementioned type, which is characterized in that the lower floor and the outer shield are rotatably mounted together about a first pivot point on the suspension, that on the inner shield, a handlebar is rigidly secured, that the inner shield and the handlebar are rotatably mounted together about a second pivot point on the lower floor, and that the inner shield by means of an edge with respect to the ceiling table along a Direction is guided, this direction has at least one component perpendicular to the scarfing plane of the inner shield.

The joist formwork system according to the invention allows a simultaneous operation (method) of inner shield, outer shield and Unterzugboden when loading and unloading. In the context of the invention, the ceiling table remains stationary during the joint operation of the inner shield, outer shield and lower floor.

The direction in which the inner shield is guided by the edge relative to the ceiling table has at least one component perpendicular to the scarfing plane of the inner shield (in the engaged position). In other words, this direction is not parallel to the scarfing plane of the inner shield. In the engaged position, the inner shield is typically oriented vertically so that the direction along which the inner shield is guided is horizontal or at least with a horizontal portion. When moving the handlebar and inner shield, guided by the edge, therefore, the (horizontal) distance of the inner shield changes to the concrete wall to be manufactured or manufactured. This is used in the context of the invention, in particular when stripping the inner shield.

In general, the edge (or guide), which determines the movement of the inner shield, in the region of the inside of the shield near the end of the handlebar. In this case, the direction along which the edge passes and the direction in which the inner shield is guided are substantially the same; this geometry minimizes bearing forces. The edge which guides the link (or its end near the inside of the shield) with respect to the ceiling table then also runs in a direction which has at least one component perpendicular to the scarfing plane of the inner shield.

When stripping the operation of the inner shield, outer shield and Unterzugboden done solely by gravity. The stripping can, for example, by lowering a support under the joist formwork in Area of the lower floor is arranged to be effected. When the support is lowered, the entirety of the outer shield and the floor of the substructure oscillates around the first articulation point following gravity away from the fabricated substructure (shuttering of the substructure bottom and outer shield). Since the entirety of the handlebar and inner shield is attached to the lower pivot point on the second pivot point, this also automatically deflects the entirety of the handlebar and inner shield. The movement of the handlebar is guided by the edge, wherein the inner plate attached to the handlebar is pivoted away from the manufactured beam (shuttering inner shield).

In other words, the edge is such that upon rotation of the outer shield and underbody about the first pivot point due to gravity, movement of the link corresponding to the edge is generated, this movement retracting, in particular pivoting away, the inner shield from the concrete wall (i.e., the manufactured beam).

Preferably, the guiding direction of the edge extends in a vertical plane which runs perpendicular to the scarfing plane of the ceiling table and also perpendicular to the scarfing plane of the inner shield. In the same vertical plane then takes the relative movement of the ceiling table and handlebar / inner shield.

The edge that guides the handlebar and the inner shield can be formed on the ceiling table, on the suspension, on the handlebar or on the inner shield. The edge cooperates with a locking means, for example a bolt, which is moved along the edge. If the edge is formed on the ceiling table or on the suspension, then the locking means is formed on the handlebar or inner shield or mounted stationary with respect to the handlebar and inner shield. If the edge is formed on the handlebar or on the inner plate, then the counter-centering means is formed on the ceiling table or on the suspension or mounted stationary with respect to the ceiling table and suspension.

With the beam forming system according to the invention, in particular beams can be made on the lateral edge of a ceiling. The first and second hinge points are located in the engaged position typically below the ceiling table; they are typically formed on a bottom bar of the floor beams. The bottom bolt is typically approximately horizontal in the engaged position.

In the context of the invention, the entirety of the inner shell skin and the associated support for the inner shell skin is understood by the inner shield. Furthermore, the entirety of the outer skin and the associated carriers (such as cross bars and end bars) are understood by the outer shield. Likewise under the bottom floor (or bottom plate) is understood the totality of bottom skin and associated carriers (such as cross bars and Bodenriegeln). The ceiling table includes a blanket and associated support (such as cross member and Jochträger).

Preferred embodiments of the invention

In a preferred embodiment of the beam forming system according to the invention, the edge extends obliquely to the scarfing plane of the inner shield and obliquely to the scarf skin level of the ceiling table. Characterized in that the leading edge obliquely both the Schalhautebene the ceiling table and the Schalhautebene of the inner shield (seen in a cross-sectional plane which is perpendicular to these two Schalhautebenen), the handlebar in a particularly compact structure both the pivotal movement of the entirety of Unterzugboden and outer shield follow, as well as a retraction of the inner shield effect. The force required to detach the inner shield is applied by the weight of the outer shield and the lower floor. At the formlining of the inner shield is thereby obliquely attacked according to the oblique edge, so that a gentle detachment of the formwork skin of the inner shield is ensured by the concrete surface of the finished beam. This embodiment is typically used with an edge on the inside shield near the end of the handlebar is arranged.

In a preferred embodiment of the Unterzugschalungssystems invention it is provided that the second hinge point is closer to the scarfing plane of the inner shield than the first hinge point, and that the edge along a direction in which with increasing distance from the formwork skin of the inner shield and the distance to the formwork of the Ceiling table increases. With this geometry, the second pivot point is pulled down during stripping (demoulding) so that the handlebar and inner shield are also guided downwards during demoulding. This is favorable in view of the space conditions, in particular the blanket skin. Overall, this is a simple structure to realize.

Also preferred is an embodiment in which the edge encloses an angle between 20 ° and 70 ° to the scarfing plane of the inner shield and an angle between 20 ° and 70 ° to the scarfing plane of the slab table. For these angular conditions forces can be transmitted well. The angular relationships apply to the switched-on state; due to the typically small pivoting of the inner shield they are given regularly and preferably in the off state.

Particularly preferred is also an embodiment in which the edge is formed by at least one slot in which a bolt extends. According to the invention, several elongated holes can also be used as edges, in particular for larger structures. Slots allow precise and reliable guidance of the handlebar, and in particular a two-sided leadership of the handlebar.

A preferred development of this embodiment provides that the slot is formed in the handlebar and the bolt extending therein is mounted stationary with respect to the ceiling table. This embodiment has been proven in practice. In particular, the bearing of the bolt can be done in standardized holes or recesses of the floor table, so that a conventional ceiling table can be used without special modifications in Unterzugschalungssystem invention. The bolt can be provided with a mounting handle.

Also preferred is an embodiment in which a first stop, in particular a slot end position, is provided which limits the relative movement of the table and the handlebars, wherein the first stop defines a switched-position of Unterzuschalungssystems, in which the Schalhautebenen of the top table and inside shield Include angle of 90 °, and in which the shuttering planes of inner shield and lower floor include an angle of 90 °. The switched-on position is particularly easy to adjust, for example by a floor bolt of the lower floor is raised with a support until the first stop is reached.

In a preferred embodiment of the joist formwork system according to the invention, the first hinge point and the second hinge point are each formed by bolts. This is particularly easy to assemble and disassemble.

Particularly preferred is a development of this embodiment, in which the bolts protrude through holes in the suspension and holes in the handlebar, each having a plurality of holes are formed on the suspension and on the handlebar, which are vertically spaced from each other in an on position. By selecting the holes of suspension and handlebar, the height of the beam (i.e., the vertical extent of the beam perpendicular to the shell level of the deck table) can be easily selected.

Also preferred is a development of this embodiment, in which the bolts protrude through holes in the bottom bolt, wherein a plurality of holes are formed in the bottom bolt, which are spaced apart horizontally in an on position. The bottom bolt is formed on the lower floor. By selecting the hole in the bottom bolt for the second Hinge point can be easily selected the width of the beam (ie the horizontal extent of the beam perpendicular to Schalhautebene the inner shield).

In a preferred embodiment, a support is provided, which engages under the lower floor at a point which lies between the first hinge point and the outer shield facing the end of the Unterzugbodens. By raising or lowering the support can be done on and off the lower formwork system.

Particularly preferred is also an embodiment in which a second stop, in particular a slot end position, is provided which limits the relative movement of the table and handlebars, the second stop in a switched-off position of the beam forming system, the common rotational movement of the bottom floor and outer shield to the limited first hinge point due to gravity. As a result, the joist formwork system according to the invention can also be kept in a switched-off position without a support. This facilitates assembly and disassembly.

In practice, has proven an embodiment in which the suspension is T-shaped and is attached to the top line of the Ts corresponding part by means of bolts on the floor table. Particularly preferably, a respective bolt is arranged in the region of the two ends of the horizontally oriented top line, so that the forces acting vertically on the suspension can be distributed uniformly over both bolts or part of the suspension corresponding to the top line.

In an advantageous embodiment, a cross-sectionally H-shaped formwork impact profile is provided, which surrounds the formwork skin of the ceiling table and rests in the upwardly switched position on the inner shield. The shuttering profile seals the transition from the slab table and the inside shield. A space between the inner shell and the formwork of the ceiling table, is spanned by the formwork shock profile, allows easy pivoting of the inner shield.

Also preferred is an embodiment, which is characterized in that the lower floor has a bottom bolt, which runs parallel to the Schalhautebene the bottom skin of the Unterzugbodens, that the bottom bar protrudes with a part on the inner side facing side edge of the Bodenschalhaut, and that the first hinge point and the second hinge point are formed on the protruding part of the bottom bolt. In the context of the invention, a plurality of bottom bolts may be provided, of which only one (or a few) protrudes (protrude). Due to the protruding bottom bolt, the hinge points are particularly easy to reach.

Finally, an embodiment is preferred in which the link extends substantially parallel to the scarfing plane of the inner shield, and that the suspension is substantially perpendicular to the scarfing plane of the ceiling table. In this construction, the forces and moments on the suspension and the handlebar can be kept low.

Further advantages of the invention will become apparent from the description and the drawings. Likewise, according to the invention, the above-mentioned features and those which are still further developed can each be used individually for themselves or for a plurality of combinations of any kind. The embodiments shown and described are not to be understood as exhaustive enumeration, but rather have exemplary character for the description of the invention.

Drawing and detailed description of the invention

Fig. 1

eine schematische Querschnittsdarstellung eines erfindungsgemäßen Unterzugschalungssystems in eingeschalter Stellung;

Fig. 2

das Unterzugschalungssystem von Fig. 1 in ausgeschalter Stellung;

Fig. 3

eine schematische Querschnittsdarstellung einer Anordnung mit zwei übereinander angeordneten erfindungsgemäßen Unterzugschalungssystemen;

Fig. 4

eine schematische Schrägansicht der Anordnung von Fig. 3:

The invention is illustrated in the drawing and will be explained in more detail with reference to embodiments. It shows:

Fig. 1

a schematic cross-sectional view of a Unterzugschalungssystems invention in the on position;

Fig. 2

the joist formwork system of Fig. 1 in off position;

Fig. 3

a schematic cross-sectional view of an arrangement with two superposed Unterzugschalungssystemen invention arranged one above the other;

Fig. 4

a schematic oblique view of the arrangement of Fig. 3 :

FIG. 1 The lower deck formwork system 1 comprises a ceiling table 2, an inner shield 3, a Unterzugboden 4, an outer shield 5, a suspension 6 and a handlebar 7. The Unterzugschalungssystem 1, a beam 8 is made of concrete, the is immediately adjacent to a ceiling 9 made of concrete and extending deeper than the underside of the ceiling 9.

The floor table 2 comprises a flat ceiling shell skin 2a, a plurality of cross members (here I-beam) 2b and Jochträger 2c (of which in cross-section of Fig. 1 only the foremost yoke carrier is visible). The inner shield 3 comprises a flat inner shell skin 3a and various carriers 3b. The lower floor 4 comprises a flat bottom skin 4a, cross member (here I-beam) 4b and bottom bar 4c, 4d. The bottom bar 4d extends below the ceiling table 2. The bottom floor 4 is under attack by a support 12 below the beam 8. The outer shield 5 comprises a flat outer shell 5a, a plurality of cross members (here I-beam) 5b and 5c Stimc latch (of which in the cross section of Fig. 1 only the frontmost bar is visible). Beam bottom 4 and outer shield 5 are rigidly connected. On the outer shield 5, a stage 10 is fixed with railing 11, which can be entered by construction workers.

The Schalhautebenen all Schalhäute 2a, 3a, 4a, 5a are perpendicular to the vertical plane of Fig. 1 , The Schalhäute 3a, 4a, 5a enclose the beam 8 sufficiently narrow to prevent leakage of liquid concrete. All adjacent Schalhäute abut each other at an angle of 90 ° to each other. An intermediate space between the ceiling shell 2a and the inner skin 3a is bridged with an H-shaped formwork joint profile 13, which rests on the upper, narrow side of the inner shell skin 3a and the blanket shell 2a surrounds.

On the ceiling table 2, namely on the yoke support 2c, the T-shaped suspension 6 is rigidly fastened in the region of the part corresponding to the top line 6a of the Ts by means of two bolts B1, B2. The bolts B1, B2 are provided with angled handles (see Fig. 4 ) and project through holes in the suspension 6 and in the Jochträger 2c. The bolt B2 additionally protrudes through a slot 14 of the handlebar 7. In the vertically extending part of the suspension 6 are formed with each other a plurality of holes 15. The lowest hole is used as the first pivot point GP1; in this hole extends a bolt B3, which also protrudes through a hole in the bottom bar 4d. The bottom bar 4d - and thus the entirety of the bottom floor 4 and outer shield 5 - is rotatably mounted on the suspension 6 at the pivot point GP1. The bottom bar 4d has numerous other holes 16 arranged side by side.

A hole of the bottom tie 4d is used as the second hinge point GP2. This hole is penetrated by a bolt B4, which also extends through a hole of the handlebar 7. The link 7 is thereby rotatably mounted about the bottom latch 4d at the second pivot point GP2. In the handlebar 7 more holes 17 are formed one above the other. On the handlebar 7, the inner shield 3 is fixed rigidly; the link 7 thus establishes a connection between the second pivot point GP2 and the inner shield.

The various holes 15, 16, 17 in the suspension 6, in the bottom tie 4d and in the handlebar 7 provide alternative positions for the hinge points GP1, GP2, if other dimensions of the tie bottom 8 are desired.

The rotational position of the arm 7 about the second pivot point GP2 is determined by the slot 14 of the arm 7. The arranged in the slot 14, with respect to the ceiling table 2 fixed bolt B2 is in particular on a left, upper long side 14a and a right, lower long side 14b of the slot 14 at. The long sides 14a, 14b are edges 14a, 14b, which guide the relative movement of the handlebar 7 and the top table 2 on both sides. The edges 14a, 14b are parallel to each other, in Fig. 1 approximately along a direction from top right to bottom left in the vertical plane of Fig. 1 , The edges 14a, 14b thus run obliquely to the vertical inner shell skin 3a and obliquely to the horizontal ceiling shell 2a.

In a certain rotational position of the bottom bolt 4d to the first pivot point GP1, and thus a certain altitude of the second pivot point GP2, only a rotational position of the arm 7 about the second pivot point GP2 is possible because of the slot 14 as a guide of the arm 7.

In the switched-on position of the joist formwork system 1 of Fig. 1 the dead weight of inner shield 3, lower floor 4 and outer shield 5 (including structures) on the first pivot point GP1 and above all on the support 12 is held. Note that the support 12 can not be moved further up because the handlebar 7 is prevented from further upward movement by the bolt B2. This is in the slot 14 already in the lower slot end position. The slot 14 forms insofar a first stop.

Now, if the support 12 is lowered, see FIG. 2 , So the entirety of the bottom floor 4 and outer shield 5 (including structures) around the stationary first pivot point GP1 clockwise pivoted to the bottom right away (see arrow 21 a).

In this case, the second hinge point, which is formed on the bottom bar 4 d of the Unterzugbodens, moved down (the slight shift to the left can be neglected here). This has the consequence that the handlebar 7 is moved together with the slot 14 down (see arrow 21 b).

Due to the bolt B2 in the slot 14 of the handlebar 7, the handlebar can be moved with its lower, pivot point near end only down when at the same time a movement of the upper innnenschildnahen end of the arm 7 parallel to the long sides of the slot 14, in particular along the edge 14a he follows. The bolt B2 forces when lowering the lower end of the handlebar upper end of the handlebar, in particular by means of the upper edge 14a of the slot 14 to the left. Overall, the upper end of the arm 7 is thus moved to the bottom left, cf. Arrow direction 21c, corresponding to the direction of the edge 14a (i.e., both away from the concrete wall of the beam 8 bounded by the inner shell 3a, and away from the ceiling shell 2a). This requires a slight pivoting of the handlebar 7 about the second pivot point GP2 in the counterclockwise direction, cf. Arrow 21d.

The rigidly attached to the handlebar 7 inner plate 3 takes part in this pivoting, which pivots away the inner shell skin 3a from the beam 8. As a result, the inner shield 3 is de-energized. The result is a gap 22 between beam 8 and inner shell skin 3a.

In the in Fig. 2 shown, turned off position of the bolt B2 in the slot 14 in the upper slot end position. This is another Lowering of the arm 7 and the second pivot point GP2 blocked. As a result, the bottom bar 4 d can not be pivoted further in the direction of arrow 21 a. The bolt B2 has thus reached a second stop in the upper slot end position, which limits the relative movement of the handlebar 7 and the table 2. In the position shown, the weight of the inner shield 3, lower floor 4 and outer shield 5 including structures is held substantially on the bolt B2. The suspension 6 undergoes a compressive stress.

The support 12 is load-free and can be easily removed. The joist formwork system 1 can be degraded overall and used, for example, in the manufacture of a beam on the ceiling of a higher floor.

In the embodiment of the FIGS. 1 and 2 the edge 14a and the associated counter means, ie the bolt B2, lie directly above the second pivot point GP2. The first pivot point GP1 is located farther out than the second pivot point GP2. As a result, the mechanism for demoulding the inner shield 3 can be made particularly compact, cf. in particular the substantially vertically extending arm 7.

In the FIG. 3 is an arrangement with a switched-in invention Unterzugschalungssystem 31 above (see. Fig. 1 ) and a Unterzugschalungssystem 32 according to the invention below, are in the inner shield, lower floor and outer shield in deschalter position (see. Fig. 2 ). Supports 33 support the slab table 2 of the upper joist formwork system 31 on the floor below.

FIG. 4 shows the arrangement of Fig. 3 in a schematic oblique view, including the supports 33 for the floor tables 2. For a better clarity in each case the front parts of the ceiling 9 and beams 8 have been omitted.

In summary, the invention describes a joist formwork for a slab table, in particular edge table, in which inner shield, bottom floor (ground shield) and outer shield are actuated together, especially when stripping by gravity. The joist formwork is rotatably mounted at a first pivot point on a suspension of the floor table. The joint pivoting movement of the lower floor and the outer panel about the first pivot point is deflected by means of a second pivot point on the lower floor and a link in an at least partially horizontal movement of the inner shield. For this purpose, a guide, in the simplest case formed by one or more edges, is used, which enforces a suitable for a shuttering relative movement of the inner shield and ceiling table (which remains stationary during demoulding of the beam) enforces.

Claims (16)

1. Ceiling joist formwork system (1; 31, 32) comprising a ceiling table (2), a vertical support (6), an inner board (3), a ceiling joist base (4), and an outer board (5), wherein the outer board (5) and the ceiling joist base (4) are connected to each other, in particular in a rigid fashion, wherein the vertical support (6) is rigidly mounted to the ceiling table (2), and wherein the ceiling joist base (4) is mounted to the vertical support (6),
   characterized in that the ceiling joist base (4) and the outer board (5) together are disposed to be rotatable about a first hinge point (GP1) on the vertical support (6), a guide (7) is rigidly connected to the inner board (3), the inner board (3) and the guide (7) together are disposed to be rotatable about a second hinge point (GP2) on the ceiling joist base (4), and the inner board (3) is guided by means of an edge (14a, 14b) with respect to the ceiling table (2) along a direction, wherein this direction has at least one component that extends perpendicularly to the form lining plane of the inner board (3).
2. Ceiling joist formwork system (1; 31, 32) according to claim 1, characterized in that the edge (14a, 14b) extends at an inclination with respect to the form lining plane of the inner board (3) and at an inclination with respect to the form lining plane of the ceiling table (2).
3. Ceiling joist formwork system (1; 31, 32) according to claim 1 or 2, characterized in that the second hinge point (GP2) is closer to the form lining plane of the inner board (3) than the first hinge point (GP1), and the edge (14a, 14b) extends along a direction in which the separation from the form lining (2a) of the ceiling table (2) also increases with increasing separation from the form lining (3a) of the inner board (3).
4. Ceiling joist formwork system (1; 31, 32) according to claim 2 or 3, characterized in that the edge (14a, 14b) subtends an angle of between 20° and 70° with respect to the form lining plane of the inner board (3), and an angle of between 20° and 70° with respect to the form lining plane of the ceiling table (2).
5. Ceiling joist formwork system (1; 31, 32) according to any one of the preceding claims, characterized in that the edge (14a, 14b) is formed through at least one elongated hole (14) in which a bolt (B2) extends.
6. Ceiling joist formwork system (1; 31, 32) according to claim 5, characterized in that the elongated hole (14) is formed in the guide (7) and the bolt (B2) that extends therein is disposed in a stationary fashion with respect to the ceiling table (2).
7. Ceiling joist formwork system (1; 31, 32) according to any one of the preceding claims, characterized in that a first stop, in particular an elongated hole end position, is provided that delimits the relative movement of the ceiling table (2) and the guide (7), wherein the first stop defines an encased position of the ceiling joist formwork system (1; 31, 32) in which the form lining planes (2a, 3a) of the ceiling table (2) and the inner board (3) subtend an angle of 90°, and in which the form lining planes (3a, 4a) of the inner board (3) and the ceiling joist base (4) subtend an angle of 90°.
8. Ceiling joist formwork system (1; 31, 32) according to any one of the preceding claims, characterized in that the first hinge point (GP1) and the second hinge point (GP2) are each formed by bolts (B3, B4).
9. Ceiling joist formwork system (1; 31, 32) according to claim 8, characterized in that the bolts (B3, B4) project through holes (15) in the vertical support (6) and holes (17) in the guide (7), wherein several holes (15, 17) are formed in each case on the vertical support (6) and on the guide (7), which are spaced apart from each other in a vertical direction in the encased position.
10. Ceiling joist formwork system (1; 31, 32) according to claim 8 or 9, characterized in that the bolts (B3, B4) project through holes (16) in the bottom locking bar (4d), wherein several holes (16) are formed in the bottom locking bar (4d) and are spaced apart from each other in a horizontal direction in the encased position.
11. Ceiling joist formwork system (1; 31, 32) according to any one of the preceding claims, characterized in that a support (12) is provided that engages below the ceiling joist base (4) at a location that is disposed between the first hinge point (GP1) and the end of the ceiling joist base (4) facing the outer board (5).
12. Ceiling joist formwork system (1; 31, 32) according to any one of the preceding claims, characterized in that a second stop, in particular an elongated hole end position is provided that delimits the relative movement of the ceiling table (2) and the guide (7), wherein the second stop delimits the common rotary motion of the ceiling joist base (4) and the outer board (5) about the first hinge joint (GP1) due to gravity in a stripped position of the ceiling joist formwork system (1; 31, 32).
13. Ceiling joist formwork system (1; 31, 32) according to any one of the preceding claims, characterized in that the vertical support (6) is formed in a T-shape and is mounted with the part (6a) that corresponds to the upper line of the T to the ceiling table (2) by means of bolts (B1, B2).
14. Ceiling joist formwork system (1; 31, 32) according to any one of the preceding claims, characterized in that a formwork junction bar (13) having an h-shaped cross-section is provided, which surrounds the form lining (2a) of the ceiling table and is supported on top of the inner board (3) in the encased position.
15. Ceiling joist formwork system (1; 31, 32) according to any one of the preceding claims, characterized in that the ceiling joist base (4) has a bottom locking bar (4d) that extends parallel with respect to the form lining plane of the bottom form lining (4a) of the ceiling joist base (4), part of the bottom locking bar (4d) projects past the side edge of the bottom form lining (4a) facing the inner board (3), and the first hinge point (GP1) and the second hinge point (GP2) are formed on the projecting part of the bottom locking bar (4d).
16. Ceiling joist formwork system (1; 31, 32) according to any one of the preceding claims, characterized in that the guide (7) substantially extends parallel with respect to the form lining plane of the inner board (3) and the vertical support (6) substantially extends perpendicularly with respect to the form lining plane of the ceiling table (2).

Images