SUPPORT SYSTEM FOR ROOF FORMWORKS

Abstract

A support system for roof formworks object of this invention with elements for providing greater stability to the system while facilitating the assembly and disassembly thereof, having a purlin with an anchoring system to a purlin holder, a purlin holder with an anchoring system to a head, a head with a seat for purlins, a head with an overlapping accessory for purlin holders and a distance fixer for purlins.

Claims

1. a purlin for a support systems for roof formworks, defined by a profile, the purlin comprising: a flat lower surface supportable on the upper surface of one or more purlin holders longitudinally slotted on said upper surface, wherein at least one end of the profile comprises a terminal having a descending extension configured as a bearing point in the slot of said slotted purlin holders.

2. The purlin according to claim 1, wherein the external edge of the extension forms an angle less than 90°, being defined as the bearing point in the slot, while the extension has a sufficient length to be able to remove the purlin from the slotted purlin holder by pivoting it downwards with respect to said external edge without the purlin raising the supported formwork.

3. The purlin according to claim 2, wherein the length of the extension is such that, in the resting condition in said slot, the lower surface of the profile is at the same level as the upper surface of the purlin holder, while the terminal has a base defined by an inner corner adjacent to the profile and an outer corner longitudinally opposite from the previous one, the descending extension being in the outer corner, the base comprising at the same time a groove in the lower face thereof, transverse to the longitudinal direction of the profile and located between the inner corner and the outer corner, the depth and width dimensions of which enable there to be the necessary space in order to remove the purlin from the purlin holder by pivoting it downwards with respect to said outer edge without the purlin raising the supported formwork.

4. The purlin according to claim 1, wherein the upper corner of the outer face of the terminal is rounded.

5. A slotted purlin holder for support systems for roof formworks, defined by a profile, the slotted purlin comprising: a flat upper surface, wherein it comprises at least one slot in the longitudinal direction in the upper surface, suitable for receiving the descending extension of a purlin.

6. The slotted purlin holder according to claim 5, wherein it comprises two longitudinal slots in the entirety of the upper surface, symmetrical to each other with respect to a longitudinal vertical middle plane, suitable to enable the reception of two purlins aligned with each other, one on each side of the slotted purlin holder.

7. The slotted purlin holder according to claim 5, wherein it comprises at least one terminal with an upper extension projected in the shape of a hook, configured in its condition of use to rest in the slot of a slotted purlin holder, both slotted purlin holders being in a transverse position therebetween and with the upper surfaces having the same height.

8. A head for posts of support systems for roof formworks, of the type comprising support elements for purlin holders, the head comprising: at least one supporting seat for the terminals for the purlins, the at least one supporting seat consisting of a slotted surface or with a stop flange, and positioned at a height with respect to the support elements for purlin holders, such that in its condition of use the seat provides continuity, as a bearing point of said terminals, for the slots of the slotted purlin holder.

9. The head according to claim 8, wherein the posts of support systems for roof formworks, comprising a horizontal support surface for purlin holders which extends from the two opposite sides of the head, wherein it comprises two cylindrical crossbeams, parallel to each other, in a horizontal position, symmetrical with respect to a vertical middle plane of the head and fastened to said horizontal surface above the ends thereof.

10. The head according to claim 9, wherein it comprises a column collinear to the post and a mechanism for lowering the crossbeams and the horizontal surface through said column.

11. The head according to claim 10, further comprising at least one supporting seat for the terminals for the purlins, the at least one supporting seat consisting of a slotted surface or with a stop flange, and positioned at a height with respect to the support elements for purlin holders, such that in its condition of use the seat provides continuity as a bearing point of said terminals, for the slots of the slotted purlin holder.

12. The head according to claim 11, wherein the horizontal support surface for purlin holders is joined to the supporting seat for purlins.

13. A purlin holder supportable on a head for support systems for roof formworks, wherein it comprises at least one terminal, the base of which is defined by an inner corner adjacent to the profile and an outer corner longitudinally opposite from the previous one, each corner having a descending extension, which are at a suitable distance in order to fit one of the crossbeams of the head comprising a column collinear to the post and a mechanism for lowering the crossbeams and the horizontal surface through said column, therebetween with a very reduced clearance, the external descending extension of one crossbeam being such that it is the only bearing point of the purlin holder in said head.

14. The purlin holder supportable on a head according to claim 13, wherein the end of the external descending extension is chamfered or rounded, or ends in an angle (α) less than 90°.

15. The purlin holder supportable on a head according to claim 13, wherein it comprises the features of the slotted purlin holder comprising a flat upper surface wherein it comprises at least one slot in the longitudinal direction in the upper surface suitable for receiving the descending extension of a purlin.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG. 1 is a top perspective view of the present support system for roof formworks.

[0033] FIG. 2A is a view of detail IIA of FIG. 1.

[0034] FIG. 2B is an elevation view of a first example of positioning of a preferred embodiment of a purlin in a preferred embodiment of a purlin holder.

[0035] FIG. 3 is an elevation view of a second example of positioning of a preferred embodiment of a purlin in a preferred embodiment of a purlin holder.

[0036] FIG. 4 is an elevation view of a possible disassembly step of the present support system for roof formworks.

[0037] FIG. 5 is a view of detail IV of FIG. 1.

[0038] FIG. 6 is a view of detail V of FIG. 1.

[0039] FIG. 7A is a front top perspective view of a preferred embodiment of the head for posts.

[0040] FIG. 7B is a rear bottom perspective view of a preferred embodiment of the head for posts.

[0041] FIG. 8A is a top perspective view of a preferred embodiment of the slotted purlin holder.

[0042] FIG. 8B is a view of a cut through the middle vertical plane of the head with two anchored purlin holders.

[0043] FIG. 9 is a bottom perspective view of detail VIII of FIG. 1.

[0044] FIG. 10 is a top perspective view of the distance fixer.

DESCRIPTION OF A PREFERRED EMBODIMENT

[0045] As shown in FIG. 1, the present invention consists of a support system for roof formworks comprising several elements designed to provide greater stability to the system while facilitating the assembly and disassembly thereof.

[0046] As seen in the detail shown in FIG. 2A, as well as in FIG. 2B and FIG. 3, one element of the system corresponds to purlins (1), consisting of a beam defined by a profile (11) comprising a lower flat surface so that it can rest on the upper surface of one or more slotted purlin holders (2). In this preferred embodiment, one end of the profile (11) comprises a terminal (12), the base of which is defined by an inner corner (13) adjacent to the profile (11) and an outer corner (14) longitudinally opposite from the previous one, the outer corner (14) having a descending extension (15). In turn, as seen in the aforementioned figures, this embodiment of the system comprises slotted purlin holders (2) defined by a profile (21) comprising a flat upper surface with two longitudinal slots (20), suitable for receiving the extension (15) of the terminal (12) of the purlin. In this preferred embodiment, the external face of the extension (15) does not end in a right angle, but rather in an angle somewhat less than 90°, such that it is the external edge (16) thereof which is defined to be the bearing point in the slots (20). At the same time, the length of the extension (15) is such that, in the resting condition thereof in said slots (20), the lower surface of the profile (11) is at the same level as the upper surface of the slotted purlin holders (2), while the terminal (12) has a groove (17) in the lower face thereof, transverse to the longitudinal direction of the profile (11) and located between the inner corner (13) and the outer corner (14), the depth and width dimensions of which enable there to be the necessary space in order to remove the purlins (1) from the slotted purlin holders (2) without needing to raise the supported formwork (not shown in the figures). Likewise, the upper corner (18) of the outer face of the terminal (12) is rounded.

[0047] FIG. 4 shows an elevation view of a possible disassembly step of the present support system for roof formworks, wherein the supported formwork (E) is seen, as well as three rails of purlin holders and posts with the corresponding heads (3) and the lowering mechanisms (4) thereof. In this step, the two heads on the right are in the disassembly position, with the corresponding mechanisms (4) unloaded, while the head (3) on the right is still with the loaded mechanism (4), meaning, anchored in the use position. Due to this, the situation occurs in which a purlin (1), in this case the middle one, is unloaded on one end and loaded on the other. A situation like this occurs every time a system similar to the one of the present invention is disassembled, since the operators unload the heads (3) of a rail of posts after having unloaded all the heads (3) from the previous rail. In these types of systems, when one of the ends of the purlins is released and the other end stays loaded in another head, since they are not configured to pivot without moving upwards, or the purlin stays horizontal, with the danger of collapsing when unloading the head supporting it, or it damages the panel it supports. However, thanks to the anchoring system between the purlins (1) and purlin holders (2) of the present invention, the purlin (1) can tilt without moving upwards, for which reason the aforementioned drawbacks are avoided.

[0048] As seen in the detail shown in FIG. 5, this preferred embodiment of the system also comprises an example of a slotted purlin holder (2), the terminal (22′) of which has an upper extension (25″) projected in the shape of a hook, configured to rest in the slots (20) of the slotted purlin holders (2) described initially, staying therebetween in a transverse position and with the upper surfaces having the same height.

[0049] Another element present in the system consists of a head for posts (3) whereon one or two slotted purlin holders (2) rest, which, in this preferred embodiment, comprises two seats (31) for the terminals (12) of the purlins (1), one on each side of the head. As seen in the detail of FIG. 6 and in FIGS. 7A and 7B, the seats (31) of this exemplary embodiment consist of a surface with a height difference, which is positioned at a height such that it provides continuity, as a bearing point of said terminals (12), for the slots (20) of the previous purlin holders (2).

[0050] This embodiment of head (3) in turn comprises a horizontal support surface (32) for the purlin holders (2), which extends from two of the opposite sides of the head (3), as well as two cylindrical crossbeams (33), parallel to each other, in a horizontal position, symmetrical with respect to a middle plane of the head (3) and fastened to the horizontal surface (32) above the ends thereof. In this embodiment, the seats (31) and the crossbeams (33) are joined to the horizontal surface (32) by corresponding lateral ends.

[0051] Likewise, this embodiment of head (3) comprises a column (34) collinear to the post supporting it and a mechanism (4) for decoupling and lowering the horizontal surface (32), as well as the seats (31) and the crossbeams (33), since they are joined to each other.

[0052] This embodiment of head (3) is linked to slotted purlin holders (2) resting on the head (3), as seen in FIGS. 8A and 8B. These embodiments of slotted purlin holders (2) comprise terminals (22), the base of which is defined by an inner corner (23) adjacent to the profile (21) of said slotted purlin holders (2) and an outer corner (24) longitudinally opposite from the previous one, each corner (23, 24) having a descending extension (25, 25′), spaced in order to fit one of the crossbeams (33) of the head (3) therebetween with a reduced clearance, the external descending extension (25) of one crossbeam being such that it is the only bearing point of the slotted purlin holder (2) in said head (3). In this case, the end of the external descending extension (25) does not end in a right angle, but in a somewhat smaller angle (a), such that the external edge (26) thereof is defined to be the bearing point on the horizontal surface (32), such that the contact area is reduced.

[0053] This head (3), as seen in FIGS. 7A, 7B and 8B, in turn comprises two automatic holding means (5) for two corresponding purlin holders. This embodiment of the automatic holding means (5) is formed by two semi-rigid rods (51), with a substantially vertical upper section, both upper ends being fastened to that of the column (34), with corresponding substantially horizontal lower sections, joined through the column (34) and intended to be positioned slightly above the purlin holders (2). In this case, the rods (51) are semi-rigid, such that they can become curved in the upper section thereof when pushed by a purlin holder and recover the resting position thereof once it is placed. However, thanks to the geometry thereof, they resist the deformation thereof in a vertical direction, thus preventing the purlin holders from being unintentionally released.

[0054] This embodiment of head (3) in turn comprises an overlapping accessory (35) for purlin holders, being slotted purlin holders (2) in this embodiment. This overlapping accessory (35) consists of a platen (36) joined to the side of the horizontal surface (32), comprising a support surface (37) configured to support an overlappable purlin holder (2′) in a parallel position and at the same height as another purlin holder (2) supported by the horizontal surface (32). This embodiment of overlapping accessory (35) also comprises an ascending projection (38) configured to be introduced into one of the complementary holes (27) located on the lower face of the overlappable purlin holder (2′), which can be seen in FIG. 9.

[0055] Finally, as shown in FIGS. 1 and 10, another element of the present system consists of a distance fixer (6) between purlin holders which is self-adjusting, defined by a profile (60) comprising at least two lower slots (61) intended to receive two parallel purlin holders (2) and the distance of which is to be fixed, the slots (61) being transverse to the longitudinal direction of the profile (60). The width of the slots (61) in the entrance area thereof is larger than that of the purlin holders (2), while it is decreasing as the slots (61) enter further into the profile (60) until reaching a width smaller than that of the purlin holders (2).

[0056] Next, possible claims of the elements and of the system described above, which complement those indicated in the claims section, are added as an option for possible divisional applications. [0057] 16. A distance fixer (6) between purlin holders which is self-adjusting for support systems for roof formworks, defined by a profile (60) comprising at least two lower slots (61) intended to receive two parallel purlin holders and the distance of which is to be fixed, the lower slots (61) being transverse to the longitudinal direction of the profile (60), characterised in that the width of the lower slots (61) in the entrance area thereof is larger than that of the purlin holders and decreases as the slots (61) enter further into the profile (60) until reaching a width smaller than that of the purlin holders. [0058] 17. A head (3) for posts of support systems for roof formworks, of the type comprising support elements for purlin holders, a column (34) collinear to the post, the height of which exceeds that of the purlin holders and a mechanism (4) for lowering said support elements along said column (34), characterised in that it comprises at least one set of automatic holding means (5) for a purlin holder, formed by a rod (51) with a substantially vertical upper section, the upper end of which is joined to the column (34) at a height greater than that of the purlin holders, and with a substantially horizontal lower section, positioned slightly above the purlin holder and linked to a pushing element which enables it to move towards the column (34) when a purlin holder presses it so as to be placed in the support element thereof and at the same time forces it to move away from the column (34) once the purlin holder has been placed so as to be located above it. [0059] 18. The head (3) according to claim 17, characterised in that the pushing element consists of a spring-type element fastened to the column. [0060] 19. The head (3) according to claim 17, characterised in that the pushing element consists of a second rod placed on the other side of the column in a symmetrical manner, the corresponding lower sections being joined, either crossing through the column or on the side thereof, such that the very weight or the semi-rigid nature of the rods is what exerts the force in order to recover the resting positions thereof once the purlin holder has been placed. [0061] 20. The head (3) according to any of claims 17 to 19, characterised in that it comprises the features of the head (3) as described in any of claims 9 to 12. [0062] 21. The head (3) for posts of support systems for roof formworks, of the type comprising at least one support element for a purlin holder, characterised in that it comprises an overlapping accessory (35) of an overlappable purlin holder (2′) consisting of at least one platen (36) joined to the side of the support element for the first purlin holder, comprising a support surface (37) configured to hold the overlappable purlin holder (2′) in a parallel position and at the same height as the first purlin holder. [0063] 22. The head (3) according to claim 21, characterised in that the overlapping accessory (35) comprises a lateral retainer for the purlin holder (2) consisting of an ascending flange located at the end of the platen (36). [0064] 23. The head (3) according to any of claim 21 or 20, characterised in that the overlapping accessory (35) comprises at least one ascending projection (38) configured to be introduced into at least one complementary hole (27) located on the lower face of the second purlin holder. [0065] 24. The head (3) according to any of claims 21 to 23, characterised in that it comprises the features of the head (3) as described in any of claims 17 to 20. [0066] 25. An overlappable purlin holder (2′) for support systems for roof formworks, characterised in that it comprises on the lower face at least one hole (27) complementary to an ascending projection (38) located in the overlapping accessory (35) of a head (3) as described in any of claim 23 or 24. [0067] 26. The overlappable purlin holder (2′) according to claim 25, characterised in that it comprises the features of the slotted purlin holder (2) as described in any of claims 13 to 15. [0068] 27. A support system for roof formworks characterised in that it comprises at least one purlin as described in any of claims 1 to 4 and at least one slotted purlin holder as described in any of claims 5 to 7, wherein a terminal of the purlin is resting in a slot of the slotted purlin holder. [0069] 28. The system according to claim 27, characterised in that it comprises at least one head as described in claim 8, wherein one end of a slotted purlin holder as described in any of claim 5 or 6 is resting in one of the support elements for purlin holders, such that the seat provides continuity as a bearing point of the terminals of the purlins for the surface of one of the slots of the slotted purlin holder. [0070] 29. The system according to any of claim 27 or 28, characterised in that it comprises at least one fixer as described in claim 16, wherein two of the lower slots of the fixer are fitted in two purlin holders. [0071] 30. The system according to any of claims 27 to 28, characterised in that it comprises at least one head as described in any of claims 9 to 12 and at least one purlin holder as described in any of claims 13 to 15, wherein one of the crossbeams of this head is fitted between the extensions of a terminal of this purlin holder. [0072] 31. The system according to any of claims 27 to 30, characterised in that it comprises a head as described in any of claims 17 to 20, wherein at least one purlin holder is supported by this head and held by one of the rods. [0073] 32. The system according to any of claims 27 to 32, characterised in that it comprises a head (3) as described in any of claims 21 to 24 and at least one overlapping purlin holder (2′) as described in any of claim 25 or 26, wherein this purlin holder is supported by the support surface of the overlapping accessory.

[0074] The details, shapes, dimensions and other accessory elements of the present invention may be conveniently replaced by others that are technically equivalent without departing from the scope defined by the claims included below.