ES2435630T3 - Folding device for formwork table - Google Patents

Abstract

Folding device (10) for a formwork table, said formwork table (5) comprising an iron (6) supported by at least one transverse beam (2) having a plurality of perforations (3), the folding device (comprising 10): a head (20) that can be pivotally mounted in the perforations (3) of a transverse beam (2) by means of a first mounting shaft (27), and to which a strut can be attached to support the formwork table (5), a latch (40), first securing means (50) configured to secure the latch (40) to the head (20) when the folding device (10) is in a working position where the strut is found substantially in an upright position, by contacting a lower pin (51) of the head (20) in a ring (52) of the latch (40); second securing means (60) configured to secure the latch (40) to the head (20), when the folding device (10) is in a folded position where the strut is tilted, by means of the lower pin housing (51) in an open slot (62) of the latch (40), characterized in that the latch (40) comprises an L-shaped hole (44) and a groove (45), where the pin (40) can be mounted with the possibility of carrying out a small horizontal and vertical movement with respect to the perforations (3) of said transverse beam (2) by means of the housing of the first mounting axis (27) in the L-shaped hole (44) and by the accommodation of a second axis of mounting (43) in the groove (45).

Description

Folding device for formwork table.

TECHNICAL FIELD OF THE INVENTION

The present invention falls within the construction sector and, more specifically, in the field of folding devices for formwork tables that allow the support beams of a formwork table to be connected to the support struts, so that said struts can adopt a folding position that allows the disassembly and transfer of the formwork table.

BACKGROUND OF THE INVENTION

In the construction sector, techniques have been used recently that allow building quickly, one of those techniques are the formwork tables consisting of plates or plates that are supported by a set of upper support beams, which in turn they rest on another set of support beams that are at a lower level and are transverse to the upper beams, where said lower cross beams are supported by struts or equivalent attachment means.

The struts are attached to the formwork tables by means of folding devices, so that the struts can adopt a working position, in which the struts are in a substantially vertical position, and a folding or folding position, in which the struts are folded in an inclined position with respect to the formwork table, so that the folding position allows disassembly and transfer of the formwork table to a new work location.

In this regard, devices such as those described in patent registers No. EP-0945564-A1, DE-1 0242670-A1 and ES-2297968-A1 are known. These documents describe folding heads between the beams and the struts, where the connection is made outside the beams, without considering the design of the current braces lower beams that include a plurality of holes. Likewise, in the state of the art there is also the European patent application nº EP-1538278-A2, which describes a formwork table where the struts are connected inside the transverse beams by means of a tilting head that allows the struts they can adopt an inclined position with respect to the table, to facilitate the disassembly of the table and its transfer to another place of use. The head has locking means, which consist of the provision of a ratchet that keeps the strut in the inclined position, which allows the transfer of the formwork table safely by, for example, a crane. However, when unlocking the struts to return them to an upright position, in a new work location, two operators are required, so that one acts on the ratchet unlocking the head, while a second operator holds and deploys the strut itself, which is an inconvenience from the operational point of view of the device and its use on site.

DE10056831 constitutes the closest state of the art of the present invention and discloses the features of the preamble of claim 1.

DESCRIPTION OF THE INVENTION

The present invention relates to a folding device for formwork tables that allows two operative stop positions to be established that comprise a working position, in which the struts are in a substantially vertical position, and a folding or folding position 30, in which the strut is inclined with respect to the plane formed by an iron of the formwork table, all in order to allow the transfer and assembly of the formwork table to a new work location. The device of the invention allows the passage of the folded position back to the working position quickly and easily by a single operator.

The device of the invention is applicable to formwork tables comprising at least one plate supported on a plurality of upper beams which in turn are supported by at least one transverse beam, or brace beam, to said upper beams, counting the transverse beams with a plurality of perforations for mounting the folding device. The device of the invention makes it possible to connect the formwork table with attachment means used to support the formwork table itself in its working position, among which European struts, aluminum struts, as well as with towers of formwork can be used.

According to the present invention, the folding device comprises the features as defined in claim 1. In particular:

 a head that can be pivotally mounted in the perforations of a transverse beam, and to which a strut is attached to support the formwork table;

a latch that can be pivotally mounted in the perforations of said transverse beam and which can slide relative to the head, in a mounting position the latch and the head can make a relative movement with each other;

first securing means configured to secure the latch to the head when the folding device is in the working position, where the strut is substantially upright and the formwork table plate is in substantially horizontal position; preventing the abatement device from leaving the working position if said abatement device is not acted upon,

second securing means configured to secure the latch to the head, preventing the folding device from leaving the folding position if said folding device is not actuated when the folding device is in the folding position, where the strut is it is inclined with respect to the formwork table and the transverse beam;

locking means configured to block the operation of the second securing means so that the latch is not secured to the head in the folded position when said head moves from the folded position to the working position, where said Locking means allow the head to return to the working position quickly and easily, being able to perform the operation a single operator.

The first means of assurance include:

a lower pin that is fixed to the head and

a heel on the latch, said heel being configured to contact 䠈 㻌 㼔 㼍 㼏 㼑 㼞 㼑 㻌 㼑 㻌 㼕 㼚 㼙 㼛 㼢 㼕 㼘 㼕 㼦 㼍 㼞 㻌 㼑 㼘 㻌 㻌 㼑 㼘 㼘 㻌work, so that, when the latch pivots with respect to the transverse beam, the lower pin of the heel is released, allowing the tilting of the head and the strut from the working position to the folding position where the strut is inclined with respect to The formwork table.

Also, the second means of assurance include:

the same lower pin of the head comprising the first securing means and,

at least one open groove, or notch, in the latch, said open groove being configured to accommodate the lower pin in the folded position where the strut is inclined with respect to the formwork table.

On the other hand, when it is desired to place the device again in the working position from the folded position, it is first necessary to place the device out of said folding position, the locking means being the ones that prevent the latch from returning to secure the device in said folding position. For this, the latch comprises an L-hole at the lower end of which a first mounting shaft is attached that joins the head and the latch to the transverse beam, so that the latch is immobilized and does not contact the head, allowing its movement Free towards the work position.

Likewise, the locking means comprise an internal pin that is fixed to the head, in an intermediate internal area of the head, which when the folding device is in a position close to that of work, coming from the folded position, contacts an internal flange that has the latch inferiorly, so that the lower end of the L-hole of the latch leaves the first mounting axis, thus allowing the movement of the latch back to the working position in which the first means of assurance immobilize the device in said working position. In this way 䠈 㻌 㼘 㼛 㼟 㻌 㼙 㼑 㼐 㼕 㼛 㼟 㻌 㼐 㼛 㼝 㼎 㼘 㼛 㼝 㼡 㼑 㼛 㻌 㼜 㼑 㼞 㼙 㼕 㼠 㼑 㼚 to a single operator acting only on the strut move from the folding position to work, without the need to manipulate the latch.

The folding device of the invention is extremely versatile, and can be mounted with MK brace cross beams as well as with DU-120 brace cross beams. The different distances between the perforations of these profiles are absorbed by different housings and circular and grooved holes comprising the head and the latch. In addition, the fact of understanding a latch, instead of using a ratchet or eccentric crank as in the case of state-of-the-art devices 䠈 allows a more compact design to be achieved, so that most of the latch is hidden so inside the head. The main advantage of the invention derives from the fact that it has means of automatic unlocking of the folding position by means of a single operator.

DESCRIPTION OF THE FIGURES

To complement the description that is being made and in order to help a better understanding of the features of the invention, according to a preferred example of practical implementation thereof, a set of drawings is attached as an integral part of this description. where for illustrative and non-limiting purposes, the following has been represented:

Figure 1 shows a bottom perspective view of a formwork table where the device of the present invention is used, as well as a detail of said view in which the folding device of the invention is shown in the position of job.

Figure 2.- Shows a top perspective view of a preferred embodiment of the head comprising the device of the invention.

Figure 3 shows a top perspective view of a preferred embodiment of the latch comprising the device of the invention.

Figure 4.- Shows a longitudinal section according to a top perspective view of the head and the latch of the device mounted on a transverse beam, the folding device having been represented in the working position.

Figure 5.- Shows a longitudinal section according to an elevation view of the device shown in Figure 4.

Figure 6.- Shows an overhead view of the device represented in Figures 4 and 5.

Figure 7 shows a schematic elevational view of the device of the invention in the working position fixedly mounted on a cross beam.

Figure 8 shows a schematic elevation view of the device of the invention in the working position mounted with the possibility of turning on a cross beam.

Figure 9 shows a schematic view, like that of Figure 8, of the device, where the latch has been moved to allow the device to be released from the working position and therefore the rotation of the strut, the arrows having been represented by the movement performed by said latch.

Figure 10.- Shows a schematic view, like that of figure 8, of the device at a later time than the one shown in figure 9, where the head moves towards the folded position.

Figure 11.- Shows a schematic view, such as that of Figure 8, 15 of the device at a later time than that shown in Figure 10, where the head and the device are in the folded position, in accordance with the present realization at 25 ° of the transverse beam, being secured in said position by means of the second securing means.

Figure 12.- Shows a schematic view, like that of figure 8, of the device at a later time than the one shown in figure 11, where the latch is moved to allow the head to be released from the folding position.

Figures 13 to 15.- They show a sequence according to three schematic views, such as that of figure 8, of the device in moments after that shown in figure 12, where the head is moved to position the latch in a position where it remains immobilized, see figure 14, the locking means acting, so that the first mounting axis is housed in the lower section of the L-hole, which allows the head to move in the opposite direction, see figures 13 and 15, to return to be placed in the work position.

Figure 16.- Shows a schematic view, like that of figure 8, of the device at a later time than the one shown in figure 15, where the action of the internal pin of the head on the internal flange of the latch is appreciated, to remove said latch lock position to return to work position.

Figure 17.- Shows a schematic view, like that of figure 8, of the device at a later time than the one shown in figure 16, where it shows again, the device in the working position.

PREFERRED EMBODIMENT OF THE INVENTION

In view of the figures outlined, reference is made specifically to Figure 1, it can be seen how in one of the possible embodiments of the invention, the folding device (10) is mounted on a formwork table

(5) which is formed by a plate (6) supported on a first network of upper beams (7), which in turn are supported by a plurality of braces or cross beams (2) that are transverse to said upper beams (7). The transverse beams (2) have a plurality of perforations (3) and a separation space (8) in their middle part, as can be seen in Figure 6.

Returning to figure 1, the transverse beams (2) are connected to struts that support the entire formwork table (5), for this connection the folding device (10) is used that is mounted between the separation space ( 8) of the cross beams (2). In this regard, it can be mentioned that some beams with perforations (3) where the device of the present invention can be used are those beams known as type MK and DU-120.

The folding device (10) comprises two main elements, the first one is a head (20) and the second is a latch (40), of which the head (20) can be pivotally mounted to the cross beam (2); Similarly 䠈 the latch (40) can also be pivotally mounted to the cross beam (2) and slides into the head (20). In mounting position the head (20) can rotate with respect to the cross beam (2).

Now, reference is made to Figure 2, to describe the head (20) of the device of the described embodiment, this head (20) is formed by a pair of lugs (21) separated and arranged substantially parallel and which they are projected in an upward direction, said lugs (21) are precisely those that are introduced into the separation space (8) of the transverse beam (2) to mount the head (20). Lugs

(twenty-one)

 have a height less than the transverse beam (2) so that they do not protrude above said transverse beam (2) and avoid interference in the movement of the folding device (10). The lugs (21) have a plurality of housings (22), which can be torn holes, grooves or circular holes running along them in order to mount the head (20) in the perforations (3) of the cross beam (2) by bolts, shafts, bolts or similar means. Some of the housings (22) have an elongated shape and others have a circular shape 䠈 which allows flexibility in the number of head mounting positions (20) in the cross beams (2), as well as in the means used for this purpose . The lugs (21) are connected to each other by means of a plurality of transverse separators (23) that give rigidity to the head (20).

The head (20) additionally comprises a body (25) or base in the form of an inverted "omega" on which the lugs (21) are projected upwards, below the body (25) the strut is received.

(25)

It has a support surface (26) where the transverse beam (2) is supported to which the head (20) is mounted.

The device includes clamping means (90) configured to hold the strut to the body (25) of the head (20), said clamping means (90) are, for the described embodiment, a wedge (91) that is inserted by sliding inside the body (25) of the head (20) and is coupled to a base plate, not shown, provided in the strut.

Now, reference is made to Figure 3, to describe the second basic element of the device and what is the latch

(40) which is formed by a flat plate (41) which has an elongated shape, having a first end (41 ') and a second end (41 "), comprising spacers (42) that allow to keep the latch (40) centered inside the lugs of the head (20) when it is in the mounting position The latch (40) comprises at least two grooves (45) located at the second end, so as to allow the insertion of a second axis assembly (43) that links the latch (40) to the transverse beam (2) when mounted, and a first end (41 ') of the latch (40) has an L-hole (44) that allows the insertion of a first mounting shaft (27) that links the latch (40) and the head (20) to the transverse beam (2) when mounted, so as not to interfere with the second mounting shaft (43) and be able to be knocked down, the head (20) comprises as many recesses (24) as slots (45) has the latch (40) .Therefore, the latch (40) is hooked in two points, with a small horizontal and vertical movement due to the grooves (45) and the L-hole (44), so that the horizontal and vertical movement of the head (20) allows the strut to be unlocked, folded down, locked at 25 ° and unlocked by a only operator.

Figure 7 shows the folding device (10) mounted on a transverse beam (2) with perforations (3) in its working position with 30 fixed character, for this the head (20) is mounted by means of the first 11 mounting shaft (27) and the second mounting shaft (43) to the cross beam (2) without the possibility of pivoting.

On the other hand, in figure 8 the folding device (10) is shown mounted on a transverse beam (2) with perforations (3) in its working position with the possibility of rotation, for this purpose the head (20) is only linked to the transverse beam (2) by the first mounting shaft (27) on which it can pivot and the latch (40) is mounted in the same way by said first mounting shaft (27), which is housed in the L-hole (44), and the second mounting shaft (43), in this working position, the strut is in a substantially vertical working position.

Referring to Figure 8, it can be mentioned that in the working position, the latch (40) is fixed to the head (20) by first securing means (50), which in the described embodiment comprise a lower pin ( 51) provided in the head (20); and, a lower heel (52) provided in the latch (40) and where the lower pin (51) is engaged or contacted when the folding device (10) is in said working position.

When the latch (40) is raised pivot with respect to the transverse beam (2), as shown in Figure 9, so that the lower pin (51) of the heel (52) is released, which allows the strut to rotate counterclockwise, as shown in figure 10, the rotation of the folding device (10) is achieved by the first mounting axis (27) of the head (20).

By continuing to rotate the strut counterclockwise, a folding position, or abatement of the folding device (10) is reached as shown in Figure 11, particularly 䠈 㻌 㼑 㼚 㻌 㼑 㼟 㼠 㼍 㻌 㼜 㼛 㼟 㼕㼏 㼕 㽾 㼚 㻌 㼐 㼑 folded, a 25º inclination of the strut is achieved. In this folding position, the latch (40) is again secured to the head (20). For this purpose, second securing means (60) are provided which, in the embodiment described, comprise the same lower pin (51) provided in the head (20); and an open groove (62) provided in the latch (40). The lower pin (51) is coupled to the open slot (62). The folding device (10) is held in this folding position due exclusively to the force of gravity, since the shape of the open groove (62) makes it impossible for the lower pin (51) to be released unless the strut is turned counterclockwise.

From the working position, once the head (20) is released, it can rotate and in its turn drags the latch (40). If the head (20) is turned until an angle of 25 ° is reached, the head (20) is locked with the open slot (62) of the latch (40). The head (20) is fixed in the folded position at 25 °. The blocking of the head (20) in the folded position is due to the gravity force of the strut acting on the latch (40).

To return to the working position, the head (20) is raised a little more, turning counterclockwise, so that the head (20) pulls the latch (40) until the locking means act, leaving the first axis Mounting housed in the lower section of the L-hole (44) of the latch (40). In this way the head (20) is loose and can turn counterclockwise, in the direction of folding.

To return to the working position, it is necessary to release the latch (40) from the raised position in which it has remained. This is achieved automatically, without the intervention of a second operator, by moving the latch (40) by means of an internal pin (28) of the head (20) acting on an internal flange (46) that has the latch inferiorly (40) in an intermediate position, as can be seen in Figures 16 and 17.

In view of this description and set of figures, the person skilled in the art will be able to understand that the embodiments of the invention that have been described can be combined in multiple ways within the scope of the appended claims.

Claims (8)

1. Folding device (10) for a formwork table, said formwork table (5) comprising a plate (6) supported by at least one transverse beam (2) having a plurality of perforations (3), the device comprising dejection (10): a head (20) that can be pivotally mounted in the perforations (3) of a cross beam (2) by means of a first mounting shaft (27), and to which a strut can be fixed to support the formwork table (5), a latch (40), first securing means (50) configured to secure the latch (40) to the head (20) when the folding device (10) is in a working position where the strut is substantially upright, by contacting a lower pin (51) of the head (20) on a heel (52) of the latch (40); second securing means (60) configured to secure the latch (40) to the head (20), when the folding device (10) is in a folded position where the strut is inclined, by means of the lower pin housing ( 51) in an open slot (62) of the latch (40), characterized in that the latch (40) comprises an L-shaped hole (44) and a groove (45), wherein the latch (40) can be mounted with the possibility of making a small horizontal and vertical movement with respect to the perforations (3 ) of said transverse beam (2) by housing the first mounting shaft (27) in the hole (44) in an L-shape and by housing a second mounting shaft (43) in the groove (45);

2.

 Formwork table folding device according to claim 1, further comprising locking means that can block the operation of the second securing means (60) so that the latch (40) is not secured to the head (20) when said head (20) returns from the folding position to the working position, said locking means comprising the L-hole (44) whose lower section houses the first mounting axis (27) when the head moves from the position folding

3.

 Folding device for formwork table according to any of claims 1 and 2, wherein the locking means comprise an internal pin (28) that is internally fixed to the head (20) and which can contact an internal flange (46) that It has the latch (40) when the head (20) moves from the folded position to the working position, acting on the latch (40) to place it in the working position.

Four.

 Folding device according to claim according to any one of claims 1 to 3, wherein the head (20) comprises a pair of lugs (21) separated in parallel and that are provided with a plurality of housings (22) configured for mounting the head (20) in the perforations (3) of the transverse beam (2).

5.

 Folding device according to any one of claims 1 to 3, wherein the lugs (21) are separated by a plurality of transverse dividers (23) that give rigidity to the head (20).

6.

 Folding device according to any one of claims 1 to 5, wherein the head (20) additionally comprises an inverted omega-shaped body (25) on which the lugs (21), said body (25) are projected upward ) for mounting the strut and having a support surface (26) where the transverse beam (2) rests.

7.

 Folding device according to any one of claims 1 to 6, wherein the head (20) includes clamping means (90) configured to hold the strut to the body (25) of the head (20).

8.

 Folding device according to any one of claims 1 to 7, wherein said fastening means

(90) comprise a wedge (91) that is inserted into the body (25) of the head (20) and is coupled to a base plate of the strut.