CH715329A9 - Formwork panel comprising a device for guiding a spacer rod. - Google Patents

Abstract

(57) A formwork panel comprising a vertical wall (11) comprising at least one spacer orifice (9) and at least one guide device (4) for a spacer rod (5) through the orifice spacer (9), said guide device (4) comprising a bearing support (42) adapted to be in contact with a tightening nut (6) locking the position of the spacer rod (5) in said spacer orifice (9), the guide device (4) comprising means for moving the support support which include 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 formwork, the control member (8) comprising a proximal end (81), configured to be driven in rotation by a screwdriver or the like, extending orthogonally to the support of support (42)

Description

GENERAL TECHNICAL FIELD AND PRIOR ART

The present invention relates to the field of construction formwork, and more particularly formwork panels.

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

The vertical wall of the form has a plurality of holes passing through it transversely in each of which a spacer can be inserted. The use of spacers makes it possible to adjust the parallelism of formwork faces of formwork positioned opposite each other in order to ensure the constant thickness of the construction formwork between the two formwork. A device for guiding a spacer rod is conventionally fixed to the rear face of the vertical wall of the formwork facing each spacer orifice of the formwork. A spacer rod comprises, in a conventional manner, a proximal end allowing it to be manipulated by an operator and a distal end comprising a thread to allow it to be screwed into a complementary threaded part.

[0004] 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 guiding the first formwork so that the spacer rod enters a first spacer orifice of the first formwork substantially orthogonally to the first formwork face. The operator then introduces the distal end of the spacer rod into a spacer hole of the second formwork so that it is received and locked in the second guide device of the second formwork. The spacer rod is clamped at both ends by clamping nuts in the guide devices so that the shuttering faces are separated by the desired distance. In practice, each guide device comprises a support plate parallel to the front formwork face on which the clamping nut comes to rest. In the locked position, the spacer rod keeps the shuttering faces parallel to each other.

[0005] When concrete in a pasty state is introduced into the formwork (pouring of the concrete), the concrete exerts thrust forces on the formwork faces which tend to separate the formwork from one another. The spacer rods make it possible to keep the formwork faces immobile by absorbing the thrust of the concrete. Due to the thrust of the concrete, a mechanical tension is created for each panel between the clamping nut, the spacer rod and the guide device. After the concrete has dried and hardened, the concrete no longer exerts pressure on the shuttering faces of the formwork. 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 formwork.

[0006] To remove a spacer rod, an operator conventionally uses a wrench to apply a loosening torque to the clamping nut from the rear face of the first formwork. 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 cannot loosen the tightening nut, he is forced to add an accessory to lengthen his wrench and thus lengthen the lever arm of the wrench 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 withdrawal time of a spacer rod is increased which is detrimental. In extreme cases, when the use of an extension accessory does not allow the tightening nut to be loosened, the operator is forced to cut the tightening nut in order to remove the spacer rod and thus release the formworks.

In order to eliminate this drawback, it has been proposed by patent EP 2 604 775 B1 of the applicant a device for guiding a spacer rod comprising means for moving the support support relative to the face formwork front of the formwork. Thanks to the displacement means, the clamping tension of the bearing support can be released, which facilitates the loosening of the clamping nut and therefore the withdrawal of the spacer rod.

[0008] In practice, the moving means are activated by an operator using a tightening key which makes it possible to cooperate with a member, connected to a cam, extending parallel to the vertical wall in order to remove a strut rod. Although reduced, the difficulty remains. In addition, the operator still has to lock the spacer rod with a spanner, which has the disadvantages mentioned above. Indeed, the cam is uniquely sized to rotate effortlessly from the locking position to the release position.

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

GENERAL PRESENTATION OF THE INVENTION

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

The invention is remarkable in that the moving means comprise at least one control member configured to adjust the spacing of the support support relative to the formwork front face of the formwork, the control member comprising a proximal end, configured to be driven in rotation by a screwdriver or the like, extending orthogonally to the bearing support.

Thanks to the control member according to the invention, an operator can conveniently move the support bracket using a screwdriver or the like from the rear of the formwork. In other words, the operator is in an ergonomic position to lock or release a strut rod. Locking and release are achieved without acting on the tightening nut. Hardship is eliminated, the operator no longer needing to use a spanner.

[0013] Preferably, the bearing support comprising a threaded control orifice, the control member is in the form of a threaded screw mounted in the threaded control orifice. Cooperation by screwing makes it possible to adjust the position of the bearing support by modifying the direction of rotation of the control member to separate or bring the bearing support closer to the shuttering face.

[0014] Preferably, the guide device comprising a housing mounted in the vertical wall of the formwork panel and the control member comprises a distal end configured to bear against the housing in order to adjust the spacing of the support. of support. Thus, the housing forms a stop for the control member in order to adjust the position of the support support which is mobile.

According to one aspect of the invention, the bearing support is configured to tilt relative to the front formwork face, preferably by an angle of inclination 8 greater than 3°. An inclination is advantageous because it allows the mechanical forces to be released gradually.

[0016] 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.

[0017] Preferably, the bearing support comprises, at a first end, a pivot connection so as to tilt the bearing support with respect to the front formwork face. Preferably, the bearing support is articulated with the housing along a horizontal axis and parallel to the formwork face.

[0018] Also preferably, the control member is mounted in a second end of the support support opposite the first end. Thus, the bearing support forms a lever arm that can be moved by the control member with reduced effort.

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

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

According to one aspect of the invention, the moving means are arranged to move the support support between: a first locking position in which the bearing support extends parallel to the front formwork face of the formwork panel and at a predetermined locking distance from the front formwork face and a second release position in which the bearing support extends at least partially to a release distance less than said locking distance.

[0022] By bringing the support support closer to the front formwork 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, bringing them closer makes it possible to increase the mechanical tension between the nut and the bearing support.

[0023] The invention also relates to a method for removing a spacer rod mounted between two face-to-face formwork panels, at least one formwork panel as presented above, a clamping nut being in contact with the formwork panel support bracket to lock the position of the spacer rod, a method comprising: a step of cooperating the proximal end of the control member with a screwdriver or the like and a step of driving the control member in rotation according to a first direction of rotation so as to separate the bearing support from the clamping nut in order to release the mechanical tension in the clamping nut.

[0024] Advantageously, the mechanical tension relative to the bearing support is released prior to the withdrawal of the spacer rod, which accelerates the withdrawal. The use of a screwdriver or the like under ergonomic conditions of use makes it possible to eliminate any hardship. Preferably, the bearing support is inclined with respect to the front formwork face of the formwork so that the bearing support is moved away from the tightening nut.

The invention further relates to a method for locking a spacer rod mounted between two face-to-face formwork panels, at least one formwork panel as presented above, a clamping nut being spaced of the support support of the formwork panel, method comprising: a step of cooperating the proximal end of the control member with a screwdriver or the like and a step of driving the control member in rotation according to a second direction of rotation so as to force the bearing support against the clamping nut in order to increase the mechanical tension in the clamping nut.

PRESENTATION OF FIGURES

The invention will be better understood on reading the following description, given solely by way of example, and with reference to the accompanying drawings in which: FIG. 1 is a schematic representation in perspective of a formwork 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, FIG. 3 is a schematic sectional representation of the guide device and of the spacer in the release position of FIG. 2, fig. 4 is a schematic representation in perspective of a guide device and a spacer in the locking position and FIG. 5 is a schematic sectional representation of the guide device and of the spacer in the locking position of FIG. 4.

It should be noted that the figures expose the invention in detail to implement the invention, said figures can of course be used to better define the invention if necessary.

DESCRIPTION OF ONE OR MORE EMBODIMENTS AND IMPLEMENTATION

[0028] With reference to FIG. 1, there is shown a formwork B according to one embodiment of the invention. The formwork B comprises a vertical wall 11 comprising a front formwork face F1 and a rear face F2 opposite the front formwork face F1. This formwork front face F1 is intended to be placed inside the formwork and to be in contact with the poured material.

In this example, the formwork B is defined in an orthogonal frame (X, Y, Z) in which the X axis extends longitudinally from front to rear, the Y axis extends laterally from left to right, and the Z axis runs vertically from bottom to top, that is, from bottom to top.

[0030] As illustrated in FIG. 1, the formwork B comprises an upper platform 12 allowing the circulation of at least one operator, in particular, during concrete pouring operations. The formwork B comprises a guardrail 13 mounted on the upper platform 12 to prevent an operator from falling. The upper platform 12 comprises a passage opening 14 in order to allow an operator to access the upper platform 12. Preferably, the upper platform 12 comprises a hinged hatch to close the passage opening 14 and prevent the fall of 'an operator.

In this example, with reference to FIG. 1, the formwork B also includes a stabilizing ballast 2 connected to the upper platform 12 by crutches in order to prevent the tilting of the vertical form B, in particular, under the force of the wind. In this embodiment, the access ladder 3 fulfills the crutch function but it goes without saying that separate crutches of the ladder 3 could be suitable. As shown in fig. 1, the stabilizing ballast 2 is mounted facing the rear face F2 and extends laterally along the Y axis. The stabilizing ballast 2 is connected to the lower part of the vertical wall 11.

The vertical wall 11 of the formwork B is pierced, in this example, with four spacer holes 9 extending perpendicular to the plane defined by the front formwork face F1. Each spacer orifice 9 (fig. 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 ensure the constant thickness of the construction formwork between the two formwork panels B. The formwork panel B comprises four guide devices 4 mounted on the rear face F2. Each guide device 4 allows a spacer rod 5 to be guided in a spacer orifice 9 of the formwork panel B.

In known manner, with reference to FIGS. 2 to 5, a spacer rod 5 is in the form of an elongated body 50 intended to extend orthogonally to the shuttering face F1 of the formwork B. Each spacer rod 5 has a proximal end 51 allowing it to be manipulated by an operator and a distal end comprising a thread to allow it to be screwed into a complementary threaded part. A clamping nut 6 is adapted to be clamped to the proximal end 51 of the spacer rod 5 to fix its position.

A guide 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 bearing support 42 on which the nut is intended to rest. clamp 6 when the latter is screwed to the proximal end 51 of the spacer rod 5. The bearing support 42 is connected to the housing 41 as will be presented later.

[0036] 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 shuttering face F1.

In this example, with reference to FIG. 2, the bearing support 42 is in the form of a bearing plate which is flat and which extends substantially vertically so that the clamping nut 6 is in plane contact with the plate of support in the locking position as shown in fig. 5. The bearing 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 in the form of a substantially vertical groove. To enable locking, the spacer rod 5 must be inserted into the lower part of the guide opening 44 so as 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 mounted to slide 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 concrete from leaking out of the formwork from the spacer hole 9 during a concrete pouring operation. When a spacer rod 5 is to be introduced into the spacer orifice 9, the operator need only manually move the protective member 7 into the upper part of the guide opening 44 in order to allow the introduction of 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 guide device 4 according to the invention comprises means for moving the bearing support 42 relative to the front formwork face F1 of the formwork panel B, in particular, relative 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 bearing support 42 with respect to the vertical wall 410. As represented in FIGS. 2 and 3, the pivot rod 43 forms a pivot connection between the upper part of the bearing support 42 and the housing 41 of the panel B to allow an angular displacement θ of the lower part of the bearing support 42. The rod pivot 43 is mounted at the upper end of the support support 42. The support support 42 can be tilted with respect to the formwork front face F1 of the formwork panel B to facilitate the loosening/tightening of the lock of tightening 6 as will be presented later. In this example, the inclination of the bearing support 42 between its locking position and its release position is of the order of 4 degrees. The pivot link is configured to only allow the lower part of the support support 42 to approach the vertical wall 410.

To guide the movement of the support support 42 and pass from a locking position to a release position, the means for moving the guide device 4 further comprise a control member 8 configured to adjust the movement of the bearing support 42 with respect to the formwork front face F1 of the formwork panel B. The control member 8 has a proximal end 81 configured to be driven in rotation by a screwdriver or the like.

Preferably, the control member 8 is in the form of a threaded screw which is mounted in a threaded control hole 45 of the bearing support 42. The control member 8 has a distal end 82 configured to bear against the vertical wall 410 of the housing 41 in the locking position. In other words, by screwing in or unscrewing the control member 8, the projecting length L1, L2 of the control member 8 is modified and, consequently, the angle of inclination 9 of the support support 42 from the vertical. The proximal end 81 of the control member 8 preferably takes the form of a polygonal head, in particular a hexagonal head.

[0041] The threaded control orifice 45 is positioned at a lower end of the bearing support 42, that is to say, at an end opposite the pivot rod 43. This advantageously makes it possible to modify the inclination 0 of the bearing support 42 by a small translational movement of the control member 8, which accelerates the tightening and release operations.

[0042] Unlike the prior art, the control member 8 extends orthogonally to the support support 42, that is to say, substantially orthogonally 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 9 of the support bracket 42 in order to release or lock a spacer rod 5 without any difficulty. An operator can advantageously dispense with using a spanner to act on the guide device 4.

In the prior art, the use of a cam only made it possible to release the forces of the spacer rod 5 due to the shape of said cam. In addition, the cam control member 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 clamping nut 6 cannot be tightened with a screwdriver since the proximal part 51 of the spacer rod 5 prohibits any access to the clamping nut 6. Thanks to the invention, the clamping nut 6 is indirectly locked/released.

[0044] Advantageously, the bearing support 42 is separated 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 bearing support 42. Indeed, by moving the bearing support 42, the latter no longer exerts any mechanical force on the clamping nut 6. The clamping nut can then be unscrewed 6 and remove the spacer rod 5 easily, without excessive effort. Conversely, the support support 42 can be brought closer to the clamping nut 6, when the latter is released, to achieve a clamping of the clamping nut 6 with the spacer rod 5 and the support of support 42. The operator can advantageously carry out all the operations using a screwdriver, without difficulty and in an ergonomic way.

[0045] The use of the guide device 4 of a form B according to the invention will now be presented to lock a spacer rod 5.

[0046] With reference to FIGS. 2 and 3, in the release position, the spacer rod 5 extends in the guide opening 44 of the bearing support 42 and in the spacer orifice 9. Thanks to the pivot connection, the support of support 42 is inclined with respect to the front formwork face F1. The tightening nut 6 is moved away from the bearing support 42 as illustrated in FIG. 3. The control member 8 is screwed into the control orifice 45 of the bearing support 42. Its distal end 82 projects by a length L1 and is not in contact with the vertical wall 410 of 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 makes 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 projecting length (length L2 in FIG. 5) so that the control member 8 comes into contact with the vertical wall 410 and increases support tension. The bearing support 42 then extends vertically, that is to say, parallel to the formwork front face F1. The bearing support 42 pivots to constrain the clamping nut 6, which locks the position of the spacer rod 5 as illustrated in FIGS. 4 and 5. 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 high tightening torque to the clamping nut 6.

Once the concrete has been poured into the formwork, the thrust of the concrete is exerted in a manner similar to the prior art. A mechanical tension is created between the clamping nut 6, the spacer rod 5 and the guide device 4. After the concrete has dried and hardened, the concrete no longer exerts pressure on the shuttering face F1 of the formwork formwork B. Nevertheless, the mechanical tension between the clamping nut 6, the spacer rod 5 and the guide device 4 remains. To remove the spacer rod 5, the operator again makes his screwdriver cooperate with the proximal end 81 of the control member 8 then actuates the screwdriver so that the distal end 82 of the control member 8 s 'deviates from the vertical wall 410 so that the bearing support 42 is inclined to the front formwork face F1. Bearing bracket 42 pivots away from clamping nut 6, which releases spacer rod 5.

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

Claims (10)

1. Formwork panel (B) comprising a vertical wall (11) comprising a formwork front face (F1) and a rear face (F2) opposite the front face (F1), the vertical wall (11) comprising at least one orifice spacer (9) and at least one guide device (4) for a spacer rod (5) through the spacer orifice (9), said guide device (4) comprising a support for support (42) adapted to be in contact with a tightening nut (6) locking the position of the spacer rod (5) in said spacer orifice (9), the guide device (4) comprising means for displacement of the support support (42) with respect to the formwork front face (F1), formwork panel 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 front formwork face (F1), the control member (8) comprising a proximal end (81), configured to be between ined in rotation by a screwdriver or the like, extending orthogonally to the bearing support (42). 2. Formwork panel (B) according to claim 1, in which, the bearing support (42) comprising a threaded control orifice (45), the control member (8) is in the form of a threaded screw mounted in the tapped pilot hole (45). 3. formwork panel (B) according to one of claims 1 and 2, wherein the guide device (4) comprising a housing (41) mounted in the vertical wall (11) of the formwork panel (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 panel (B) according to one of claims 1 to 3, wherein the bearing support (42) is configured to tilt relative to the formwork front face (F1), preferably, an inclination angle θ greater than 3°. 5. formwork panel (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. 6. formwork panel (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 tilt the support support (42) relative to the front formwork face (F1). 7. formwork panel (B) according to claim 6, wherein the control member (8) is mounted in a second end of the bearing support (42) opposite the first end. 8. formwork panel (B) according to one of claims 1 to 7, wherein the moving means are arranged to move the support support (42) between: – a first locking position in which the bearing support (42) extends parallel to the front formwork face (F1) of the formwork panel (B) and at a predetermined locking distance from the front formwork face and – a second release position in which the bearing support (42) extends at least partially to a release distance less than said locking distance. 9. A method of removing a spacer rod (5) mounted between two formwork panels (B) facing each other, at least one formwork panel (B) being defined according to one of claims 1 to 8, a clamping nut (6) being in contact with the bearing support (42) of the formwork panel (B) to lock the position of the spacer rod (5), a 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 the control member (8) in rotation according to a first direction of rotation so as to separate the bearing support (42) from the tightening nut (6) in order to release the mechanical tension in the clamping nut (6). 10. A method of locking a spacer rod (5) mounted between two formwork panels (B) facing each other, at least one formwork panel (B) being defined according to one of claims 1 to 8, a clamping nut (6) being moved away from the bearing support (42) of the formwork panel (B), 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 the control member (8) in rotation according to a second direction of rotation so as to force the bearing support (42) against the tightening nut (6) in order to increase the tension mechanism in the clamping nut (6).