BE1026213A1 - FORMING BANK HAVING A DEVICE FOR GUIDING A SPINDLE ROD - Google Patents

Abstract

A formwork panel having a vertical wall (11) having at least one spacer hole (9) and at least one guide device (4) of a spacer rod (5) through the spacer hole (9), said guiding device (4) comprising a support (42) adapted to be in contact with a clamping nut (6) locking the position of the spacer rod (5) in said orifice of spacer (9), the guiding device (4) comprising means for displacing the bearing support which comprise at least one control member (8) configured to adjust the spacing of the support support (42) relative to the formwork front face (F1) of the boss (B), the control member (8) having a proximal end (81), configured to be rotated by a screw driver or the like, extending orthogonally to the support of support (42).

Description

FORMING BANK HAVING A DEVICE FOR GUIDING A SPINDLE ROD

GENERAL TECHNICAL FIELD AND PRIOR ART

The present invention relates to the field of building formwork, and more particularly to the shuttering formwork.

In known manner, a formwork panel comprises a vertical wall comprising a formwork front face and a rear face opposite to the front face, an upper platform for the circulation of at least one operator and an access ladder to the upper platform.

The vertical wall of the panel has a plurality of orifices transversely therethrough in each of which a spacer can be inserted. The use of spacers makes it possible to adjust the parallelism of shuttering faces of panels positioned opposite each other in order to ensure the constant thickness of the construction formwork between the two panels. A device for guiding a spacer rod is conventionally attached to the rear face of the vertical wall of the panel opposite each spacer hole of the formwork. A spacer rod conventionally comprises a proximal end for manipulation by an operator and a distal end having a thread for allowing its screwing into a complementary threaded portion.

To adjust the parallelism between a first formwork face of a first formwork and a second formwork face of a second formwork, an operator grasps a spacer rod by its proximal end and introduces its distal end into a first guide device of the first member so that the spacer rod enters a first spacer hole of the first form substantially orthogonal to the first formwork face. The operator then introduces the distal end of the spacer rod in a spacer hole of the second form to be received and locked in the second guide device of the second form. The spacer rod is tightened at both ends by clamping nuts in the guiding devices so that the form faces are spaced apart by the desired distance. In practice, each guide device comprises a bearing plate parallel to the formwork front face on which the clamping nut is supported. In the locked position, the spacer rod holds the formwork faces parallel to each other.

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When concrete in the pasty state is introduced into the formwork (concrete pouring), the concrete exerts thrust forces on the formwork faces that tend to spread the banners from one another. The spacer rods make it possible to keep the shuttering faces immobile by absorbing the thrust of the concrete. Because of the thrust of concrete, a mechanical tension is created for each section between the clamping nut, the spacer rod and the guide device. After drying and hardening of the concrete, the concrete no longer exerts pressure on the shuttering faces of the panels. Nevertheless, the mechanical tension between the clamping nut, the spacer rod and the guide device remains and it is difficult for an operator to remove the spacer rod connecting the panels.

To remove a spacer rod, an operator conventionally uses a wrench to apply a loosening torque to the clamping nut from the back side of the first form. Due to the mechanical tension, the clamping nut is firmly locked and the operator is forced to force to apply a sufficient loosening torque. When the operator can not loosen the clamping nut, he is forced to add an accessory to extend his key and thus lengthen the lever arm of the key so as to apply a greater loosening torque. This implementation is particularly restrictive because it requires the operator to have an extension accessory. In addition, the shrinkage time of a spacer rod is increased which is detrimental. In extreme cases, when the use of an extension attachment does not allow the clamping nut to be loosened, the operator is forced to cut the clamping nut in order to remove the spacer rod and thereby release the formwork.

In order to eliminate this disadvantage, it has been proposed by EP2604775B1 of the applicant a device for guiding a spacer rod comprising means for moving the support support relative to the formwork front face of the formwork. Thanks to the displacement means, it is possible to release the tightening tension of the support support, which facilitates the loosening of the clamping nut and thus the removal of the spacer rod.

In practice, the displacement means are activated by an operator with the aid of a tightening wrench which makes it possible to cooperate with a member, connected to a cam, extending parallel to the vertical wall in order to remove a rod of spacer. Although reduced, the hardness remains. In addition, the operator must still perform a locking of the spacer rod with a wrench, which has the disadvantages mentioned above. Indeed, the cam is dimensioned only to rotate effortlessly from the locking position to the release position.

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One of the objectives of the present invention is to eliminate any difficulty in locking or releasing a spacer rod of a formwork slab.

GENERAL PRESENTATION OF THE INVENTION

For this purpose, the invention relates to a shuttering panel comprising a vertical wall comprising a formwork front face and a rear face opposite to the front face, the vertical wall comprising at least one spacer orifice and at least one guide device. a spacer rod through the spacer hole, said guide device comprising a support support adapted to be in contact with a clamping nut locking the position of the spacer rod in said spacer hole , the guide device comprising means for moving the support support relative to the formwork front face.

The invention is remarkable in that the displacement means comprise at least one control member configured to adjust the spacing of the support support relative to the formwork front face of the banche, the control member having a proximal end configured to be rotated by a screw driver or the like extending orthogonally to the support.

Thanks to the control member according to the invention, an operator can conveniently move the support support with a screwdriver or the like from the back of the form. In other words, the operator is in an ergonomic position to lock or release a spacer rod. Locking and release are achieved without acting on the clamping nut. Toughness is eliminated, the operator no longer need to use a wrench.

Preferably, the support support having a tapped control orifice, the control member is in the form of a threaded screw mounted in the tapped control orifice. Screw-on cooperation makes it possible to adjust the position of the support support by modifying the direction of rotation of the control member in order to move the support support away from or toward the formwork face.

Preferably, the guide device comprising a housing mounted in the vertical wall of the formwork and the control member has a distal end configured to abut against the housing to adjust the spacing of the support support . Thus, the housing forms a stop for the control member to adjust the position of the support support which is movable.

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According to one aspect of the invention, the support support is configured to tilt relative to the formwork front face, preferably an inclination angle Θ greater than 3 °. An inclination is advantageous because it makes it possible to release the mechanical forces in a progressive manner.

Preferably, the proximal end of the control member is in the form of a polygonal head, in particular a hexagonal head. Thus, the cooperation of the proximal end with a screwdriver or the like is optimal.

Preferably, the support support comprises, at a first end, a pivot connection so as to incline the support support relative to the formwork front face. Preferably, the support support is articulated with the housing along a horizontal axis and parallel to the formwork face.

More preferably, the control member is mounted in a second end of the support support opposite to the first end. Thus, the support support forms a lever arm that can be moved by the control member with reduced effort.

According to another aspect of the invention, the displacement means are adapted to move the support support parallel to the formwork front face of the formwork.

Preferably, the support support is in the form of a flat plate and advantageously allows a plane contact with the clamping nut which secures its clamping.

According to one aspect of the invention, the displacement means are arranged to move the support support between:

a first locking position in which the support support extends parallel to the formwork front face of the formwork box and at a predetermined locking distance from the front formwork face and

a second release position in which the support support extends at least partially at a release distance less than said locking distance.

By bringing the support support closer to the formwork front face, the support support is moved away from the clamping nut, which makes it possible to reduce the mechanical tension between the nut and the support support. In a reciprocal manner, a reconciliation makes it possible to increase the mechanical tension between the nut and the support support.

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The invention also relates to a method of removing a spacer rod mounted between two shuttering boxes facing each other, at least one shuttering panel as presented above, a clamping nut being in contact with the support method of supporting the formwork box to lock the position of the spacer shaft, which method comprises:

a step of cooperation of the proximal end of the control member with a screwdriver or the like and

- A step of driving in rotation of the control member in a first direction of rotation so as to move the support support of the clamping nut to release the mechanical tension in the clamping nut.

Advantageously, the mechanical tension relative to the support support is released prior to removal of the spacer rod which accelerates the withdrawal. The use of a screwdriver or the like under ergonomic conditions of use eliminates any difficulty. Preferably, the support support is inclined relative to the formwork front face of the formwork so that the support support is spaced from the clamping nut.

The invention furthermore relates to a method of locking a spacer rod mounted between two shuttering panels opposite one another, at least one formwork shutter as presented above, a tightening nut being spaced from the support of support of the formwork panel, the method comprising:

a step of cooperation of the proximal end of the control member with a screwdriver or the like and a step of rotating the control member in a second direction of rotation so as to constrain the support support against the clamping nut to increase the mechanical tension in the clamping nut.

PRESENTATION OF FIGURES

The invention will be better understood on reading the description which will follow, given solely by way of example, and referring to the appended drawings in which:

FIG. 1 is a diagrammatic perspective view of a formwork box according to one embodiment of the invention comprising four spacer guide devices, FIG. 2 is a schematic perspective representation of a guide device and a spacer in the release position,

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FIG. 3 is a diagrammatic sectional representation of the guiding device and the spacer in the release position of FIG. 2,

FIG. 4 is a diagrammatic representation in perspective of a guiding device and a spacer in the locked position, and FIG. 5 is a diagrammatic representation in section of the guiding device and of the spacer in the locking position of FIG. figure 4.

It should be noted that the figures disclose the invention in detail to implement the invention, said figures can of course be used to better define the invention where appropriate.

DESCRIPTION OF ONE OR MORE MODES OF REALIZATION AND IMPLEMENTATION

Referring to Figure 1, there is shown a shuttering formwork B according to one embodiment of the invention. The shuttering formwork B comprises a vertical wall 11 comprising a formwork front face F1 and a rear face F2 opposite to the formwork front face F1. This formwork front face F1 is intended to be disposed internally to the formwork and to be in contact with the cast material.

In this example, the formwork box B is defined in an orthogonal reference (X, Y, Z) in which the X axis extends longitudinally from front to back, the Y axis extends laterally from the left towards the straight line and the Z axis extends vertically from bottom to top, that is to say, from a lower part to an upper part.

As illustrated in Figure 1, the formwork formwork B comprises an upper platform 12 for the circulation of at least one operator, in particular during the concrete pouring operations. The shuttering form B comprises a railing 13 mounted on the upper platform 12 to prevent the fall of an operator. The upper platform 12 includes a passage opening 14 to allow an operator access to the upper platform 12. Preferably, the upper platform 12 comprises an articulated door to close the passage opening 14 and prevent the fall of 'an operator.

In this example, with reference to FIG. 1, the formwork board B also comprises a stabilizing ballast 2 connected to the upper platform 12 by crutches in order to prevent the vertical board B from tilting, in particular under the wind stress. In this embodiment, the access ladder 3 fulfills the function of crutch but it goes without saying that separate crutches of the scale 3 could be suitable. As illustrated in FIG. 1, the stabilization ballast 2 is mounted in

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BE2019 / 5243 view of the rear face F2 and extends laterally along the Y axis. The stabilization ballast 2 is connected to the lower part of the vertical wall 11.

The vertical wall 11 of the panel B is pierced, in this example, four spacer holes 9 extending perpendicularly to the plane defined by the front formwork face F1. Each spacer orifice 9 (FIGS. 3 and 5) is capable of receiving a spacer rod 5 making it possible to adjust the parallelism of the formwork faces of the formwork panels B positioned opposite each other in order to make sure of the constant thickness of the construction formwork between the two formwork panels B. The formwork panel B comprises four guiding devices 4 mounted on the rear face F2. Each guide device 4 allows the guidance of a spacer rod 5 in a spacer hole 9 of the formwork box B.

In known manner, with reference to Figures 2 to 5, a spacer rod 5 is in the form of an elongated body 50 intended to extend orthogonally to the formwork face F1 of the formwork box B. 5 has a proximal end 51 for manipulation by an operator and a distal end having a thread to allow its screwing into a complementary threaded portion. A clamping nut 6 is adapted to be clamped to the proximal end 51 of the spacer rod 5 to secure its position.

A guiding device 4 will now be presented in detail with reference to FIGS. 2 to 5.

In this example, each guide device 4 comprises a housing 41, which is mounted in the rear face F2 of the vertical wall 11, and a support support 42 on which is intended to rest the clamping nut 6 when the latter is screwed to the proximal end 51 of the spacer rod 5. The support support 42 is connected to the housing 41 as will be presented later.

With reference to FIGS. 3 and 5, the housing 41 comprises a vertical wall 410 in which is formed an orifice aligned with the spacer orifice 9 of the shuttering face F1. In this example, the vertical wall 410 extends parallel to the formwork face F1.

In this example, with reference to FIG. 2, the support support 42 is in the form of a support plate which is flat and which extends substantially vertically so that the clamping nut 6 or in plane contact with the support plate in the locking position as shown in Figure 5. The support support 42 has a guide opening 44 in which the spacer rod 5 is intended to extend. In this example, the guide opening 44 is

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BE2019 / 5243 is in the form of a substantially vertical groove. To allow locking, the spacer rod 5 must be inserted into the lower part of the guide opening 44 in order to be aligned with the spacer hole 9 of the shuttering face F1. In this example, the guide device 4 comprises a protective member 7 which is slidably mounted in the guide opening 44. In the absence of a spacer rod 5, the protective member 7 is positioned in the lower part of the guide opening 44 due to gravity. This prevents the concrete from escaping from the formwork from the spacer hole 9 during a concrete pouring operation. When a spacer rod 5 has to be introduced into the spacer hole 9, the operator simply has to move the protection member 7 manually in the upper part of the guide opening 44 in order to allow the introducing the spacer rod 5 into the lower part of the guide opening 44 as illustrated in FIGS. 2 to 5.

Still with reference to FIGS. 2 to 5, the guiding device 4 according to the invention comprises means for moving the support support 42 with respect to the formwork front face F1 of the formwork box B, in particular, with respect to the vertical wall 410 of the housing 41. The displacement means comprise, in this example, a pivot rod 43 adapted to allow the inclination of the support support 42 relative to the vertical wall 410. As shown in FIGS. 3, the pivot rod 43 forms a pivot connection between the upper part of the support support 42 and the housing 41 of the B-shaped piece to allow angular displacement Θ of the lower part of the support support 42. The pivot rod 43 is mounted at the upper end of the support support 42. The support support 42 can tilt relative to the formwork front face F1 of the shuttering form B to facilitate the loosening / tightening of the clamping lock 6 as it will be pr sented later. In this example, the inclination of the support support 42 between its locking position and its release position is of the order of 4 degrees. The pivot connection is configured to allow only a bringing of the lower part of the support support 42 towards the vertical wall 410.

To guide the movement of the support support 42 and to move from a locking position to a release position, the displacement means of the guide device 4 further comprise a control member 8 configured to adjust the movement of the support of support 42 relative to the formwork front face F1 of the formwork box B. The control member 8 has a proximal end 81 configured to be rotated by a screw driver or the like.

Preferably, the control member 8 is in the form of a threaded screw which is mounted in a threaded control orifice 45 of the support support 42. The control member 8 has a distal end 82 configured to come to bear against the vertical wall 410

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BE2019 / 5243 of the housing 41 in the locking position. In other words, by screwing in or out of the control member 8, the projecting length L1, L2 of the control member 8 is modified and, consequently, the angle of inclination Θ of the support support 42 relative to the vertical. The proximal end 81 of the control member 8 is preferably in the form of a polygonal head, in particular a hexagonal head.

The tapped control orifice 45 is positioned at a lower end of the support support 42, that is to say, at an end opposite to the pivot rod 43. This advantageously makes it possible to modify the inclination Θ of the support support 42 by a small displacement in translation of the control member 8, which accelerates the clamping and release operations.

Unlike the prior art, the control member 8 extends orthogonally to the support support 42, that is to say, substantially orthogonal to the rear wall F2, which allows an operator to act on the guide device 4 by means of a screwdriver or the like to adjust the angle of inclination Θ of the support support 42 to release or lock a spacer rod 5 without any difficulty. An operator can advantageously avoid using a wrench to act on the guiding device 4.

In the prior art, the use of a cam only allowed to release the forces of the spacer rod 5 due to the shape of said cam. In addition, the control member of the cam extended parallel to the shuttering face F1, which prevented any tightening with a screwdriver or the like, lateral access not being possible with a screwdriver. A tightening nut 6 can not be tightened with a screwdriver since the proximal portion 51 of the spacer rod 5 prevents access to the clamping nut 6. Thanks to the invention, the clamping nut 6 is locked / released indirectly.

Advantageously, the support support 42 is spaced from the clamping nut 6, when the latter is locked, to significantly reduce the mechanical tension in the clamping nut 6, the spacer rod 5 and the support support 42. Indeed, by moving the support support 42, it no longer exerts mechanical force on the clamping nut 6. It can then unscrew the clamping nut 6 and remove the spacer rod 5 easily, without excessive effort. In a reciprocal manner, the support support 42 can be brought closer to the clamping nut 6, when the latter is released, in order to clamp the clamping nut 6 with the spacer rod 5 and the support of FIG. 42. The operator can advantageously perform all operations using a screwdriver, without difficulty and ergonomically.

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The use of the guide device 4 of a panel B according to the invention will now be presented to lock a spacer rod 5.

With reference to FIGS. 2 and 3, in the release position, the spacer rod 5 extends into the guide opening 44 of the support support 42 and into the spacer hole 9. Thanks to the pivot connection the support support 42 is inclined relative to the formwork front face F1. The clamping nut 6 is spaced apart from the support support 42 as illustrated in FIG. 3. The control member 8 is screwed into the control port 45 of the support support 42. Its distal end 82 extends protruding a length L1 and is not in contact with the vertical wall 410 of the housing 41.

To lock the spacer rod 5, the operator moves the clamping nut 6 to bring it into contact with the support support 42. Then, the operator has his screwdriver cooperate with the proximal end 81 of the control member 8 then actuates the screwdriver so that the distal end 82 increases its protruding length (length L2 in FIG. 5) so that the control member 8 comes into contact with the vertical wall 410 and increases the tension of support. The support support 42 then extends vertically, that is to say, parallel to the front formwork F1. The support support 42 pivots to constrain the clamping nut 6, which locks the position of the spacer rod 5 as shown in Figures 4 and 5. The manipulation of the screwdriver by the operator is easy given that the control member 8 extends substantially orthogonally to the formwork face F1, the proximal end 81 then being easily accessible even with a screwdriver. It is no longer necessary for the operator to apply a large tightening torque on the clamping nut 6.

Once concrete poured into the formwork, the thrust of the concrete is exercised in a manner similar to the prior art. A mechanical tension is created between the clamping nut 6, the spacer rod 5 and the guiding device 4. After drying and hardening of the concrete, the concrete no longer exerts thrust on the formwork face F1 of the box of formwork B. Nevertheless, the mechanical tension between the clamping nut 6, the spacer rod 5 and the guiding device 4 remains. To remove the spacer rod 5, the operator again cooperates his screwdriver with the proximal end 81 of the control member 8 and then actuates the screwdriver so that the distal end 82 of the control member 8 s' away from the vertical wall 410 so that the support support 42 is inclined to the formwork front face F1. The support support 42 pivots to move away from the clamping nut 6, which releases the spacer rod 5.

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Thanks to the invention, a spacer rod 5 can be locked / released in a practical, ergonomic and painless manner.

Claims (10)

1. Formwork shuttering (B) comprising a vertical wall (11) comprising a formwork front face (F1) and a rear face (F2) opposite to the front face (F1), the vertical wall (11) comprising at least one orifice spacer (9) and at least one guide (4) of a spacer rod (5) through the spacer hole (9), said guide device (4) having a support support (42) adapted to be in contact with a clamping nut (6) locking the position of the spacer rod (5) in said spacer hole (9), the guiding device (4) comprising means for displacement of the support support (42) relative to the formwork front face (F1), formwork shutter characterized in that the displacement means comprise at least one control member (8) configured to adjust the spacing of the support support (42) relative to the formwork front face (F1), the control member (8) having a proximal end (81), configured to be rotated by a screwdriver or the like, extending orthogonally to the support (42). 2. Formwork shuttering (B) according to claim 1, wherein, the support support (42) having a threaded control orifice (45), the control member (8) is in the form of a threaded screw mounted in the threaded control port (45). 3. Formwork shuttering (B) according to one of claims 1 and 2, wherein the guide device (4) having a housing (41) mounted in the vertical wall (11) of the shuttering board (B), the control member (8) has a distal end (82) configured to bear against the housing (41) in order to adjust the spacing of the support support (42). 4. Formwork shuttering (B) according to one of claims 1 to 3, wherein the support support (42) is configured to tilt relative to the formwork front face (F1), preferably of An inclination angle Θ greater than 3 °. 5. formwork shutter (B) according to one of claims 1 to 4, wherein the proximal end (81) of the control member (8) is in the form of a polygonal head, in particular, a hexagonal head. 2019/5243 BE2019 / 5243 6. Formwork shuttering (B) according to one of claims 1 to 5, wherein the support support (42) comprises, at a first end, a pivot connection so as to incline the support support (42). compared to the formwork front (F1). 7. Formwork shuttering (B) according to claim 6, wherein the control member (8) is mounted in a second end of the support support (42) opposite the first end. 8. Formwork shuttering (B) according to one of claims 1 to 7, wherein, the displacement means are arranged to move the support support (42) between: a first locking position in which the support support (42) extends parallel to the formwork front face (F1) of the formwork board (B) and at a predetermined locking distance from the front formwork face and - A second release position in which the support support (42) extends at least partially at a release distance less than said locking distance. 9. A method of removing a spacer rod (5) mounted between two shuttering panels (B) vis-à-vis, at least one formwork shuttering (B) being defined according to one of claims 1 to 8, a clamping nut (6) being in contact with the support support (42) of the formwork board (B) to lock the position of the spacer rod (5), the method comprising: a step of cooperation of the proximal end (81) of the control member (8) with a screwdriver or the like and - A step of driving in rotation of the control member (8) in a first direction of rotation so as to move the support support (42) of the clamping nut (6) to release the mechanical tension in the clamping nut (6). 10. A method of locking a spacer rod (5) mounted between two shuttering panels (B) vis-à-vis, at least one shuttering formwork (B) being defined according to one of claims 1 to 8, a clamping nut (6) being spaced apart from the support support (42) of the formwork board (B), the method comprising: a step of cooperation of the proximal end (81) of the control member (8) with a screwdriver or the like and a step of driving in rotation of the control member (8) in a second direction of rotation so as to constrain the support support (42) against 2019/5243 BE2019 / 5243 tightening nut (6) to increase the mechanical tension in the clamping nut (6).