FR3080132A1 - FORMING BANK HAVING A DEVICE FOR GUIDING A SPINDLE ROD - Google Patents

Abstract

A shuttering 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 formwork (B), the control member (8) having a proximal end (81), configured to be rotated by a screwdriver or the like, extending orthogonally to the support of support (42).

Description

FORMWORK BENCH HAVING A DEVICE FOR GUIDING A SPACER ROD

GENERAL TECHNICAL AREA AND PRIOR ART

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

In known manner, a formwork form comprises a vertical wall comprising a formwork front face and a rear face opposite to 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 panel has a plurality of orifices transversely passing through it, in each of which a spacer can be inserted. The use of spacers makes it possible to adjust the parallelism of shuttering faces of forms positioned opposite each other in order to ensure the constant thickness of the construction formwork between the two forms. A device for guiding a spacer rod is conventionally fixed to the rear face of the vertical wall of the panel opposite each spacer orifice of the panel. A spacer rod typically comprises 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 tapped part.

To adjust the parallelism between a first form face of a first form and a second form face of a second form, an operator grasps a spacer rod by its proximal end and introduces its distal end into a first device for guiding the first section so that the spacer rod enters a first spacer orifice of the first section substantially orthogonally to the first form face. The operator then introduces the distal end of the spacer rod into a spacer orifice of the second section so that it is received and locked in the second guide device of the second section. The spacer rod is tightened at its two ends by clamping nuts in the guide devices so that the shuttering faces are spaced the desired distance. In practice, each guide device comprises a support plate parallel to the formwork front face on which the tightening nut comes to bear. In the locked position, the spacer rod keeps the shuttering faces parallel to each other.

When concrete in a pasty state is introduced into the formwork (pouring concrete), the concrete exerts thrust forces on the formwork faces which tend to separate the formwork from one another. The spacer rods keep the shuttering faces stationary by absorbing the thrust of the concrete. Due to the concrete push, a mechanical tension is created for each form between the tightening nut, the spacer rod and the guide device. After the concrete has dried and hardened, the concrete no longer pushes on the formwork faces of the formwork. However, the mechanical tension between the tightening nut, the spacer rod and the guide device remains and it is difficult for an operator to remove the spacer rod connecting the formwork.

To remove a spacer rod, an operator conventionally uses a wrench to apply a loosening torque to the tightening nut from the rear face of the first branch. Due to mechanical tension, the tightening nut is firmly locked and the operator is forced to apply force to apply sufficient loosening torque. When the operator cannot loosen the tightening nut, he is forced to add an accessory to lengthen 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 duration of withdrawal of a spacer rod is increased which is detrimental. In extreme cases, when the use of an extension accessory does not loosen the tightening nut, the operator is forced to cut the tightening nut in order to remove the spacer rod and thus release the formwork.

In order to eliminate this drawback, it has been proposed by patent 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 tightening nut and therefore the withdrawal of the spacer rod.

In practice, the displacement 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 rod. spacer. Although reduced, the arduousness remains. In addition, the operator must still perform a locking of the spacer rod with a tightening key, which has the drawbacks mentioned above. Indeed, the cam is only dimensioned to effortlessly rotate from the locking position to the release position.

One of the objectives of the present invention is to eliminate any arduous effort to lock or release a spacer rod from a formwork form.

GENERAL PRESENTATION OF THE INVENTION

To this end, the invention relates to a formwork form 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 d '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 shuttering front face of the formwork, the control member comprising a proximal end , configured to be rotated by a screwdriver or the like, extending orthogonally to the support support.

Thanks to the control device according to the invention, an operator can move the support support in a practical manner using a screwdriver or the like from the rear of the panel. In other words, the operator is in an ergonomic position to lock or release a spacer rod. Locking and release are carried out without acting on the tightening nut. The arduousness is eliminated, the operator no longer having to use a tightening wrench.

Preferably, the support support comprising a tapped control orifice, the control member is in the form of a threaded screw mounted in the tapped control orifice. A cooperation by screwing makes it possible to adjust the position of the support support by modifying the direction of rotation of the control member to move apart or bring the support support closer to the form face.

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

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

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 link so as to tilt 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 form face.

More preferably, the control member is mounted in a second end of the support support opposite the first end. Thus, the support support forms a lever arm which 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 flat contact with the tightening nut which secures its tightening.

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 form and at a predetermined locking distance from the front formwork face and a second release position in which the formwork support support extends at least partially to a release distance less than said locking distance.

By bringing the support support closer to the formwork front face, the support support is removed from the clamping nut, which makes it possible to reduce the mechanical tension between the nut and the support support. Conversely, a reconciliation increases the mechanical tension between the nut and the support.

The invention also relates to a method of removing a spacer rod mounted between two formwork forms facing one another, at least one formwork formwork as presented above, a tightening nut being in contact with the support. support of the formwork form to lock the position of the spacer rod, method comprising:

a step of cooperation of 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 support support from 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 the withdrawal of the spacer rod which accelerates the withdrawal. The use of a screwdriver or the like under ergonomic conditions of use eliminates any arduousness. Preferably, the support support is inclined relative to the shuttering front face of the formwork so that the support support is spaced from the tightening nut.

The invention further relates to a method for locking a spacer rod mounted between two formwork forms facing one another, at least one formwork formwork as presented above, a tightening nut being spaced from the support d '' formwork support, process comprising:

a step of cooperation of 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 constrain the support support against the clamping nut to increase the mechanical tension in the clamping nut.

PRESENTATION OF THE FIGURES

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

Figure 1 is a schematic perspective view of a formwork form according to an embodiment of the invention comprising four spacer guide devices, Figure 2 is a schematic perspective view of a guide device and d 'a spacer in the release position, Figure 3 is a schematic sectional view of the guide device and the spacer in the release position of Figure 2, Figure 4 is a schematic perspective view of a guide device and of a spacer in the locked position and FIG. 5 is a diagrammatic representation in section of the guide device and of the spacer in the locked position of FIG. 4.

It should be noted that the figures show 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 MODES OF IMPLEMENTATION AND IMPLEMENTATION

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

In this example, the formwork panel B is defined in an orthogonal coordinate system (X, Y, Z) in which the X axis extends longitudinally from front to back, the Y axis extends laterally from left to 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 FIG. 1, the formwork form B comprises an upper platform 12 allowing the circulation of at least one operator, in particular, during concrete pouring operations. The formwork panel B includes a railing 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 form B also includes a stabilization ballast 2 connected to the upper platform 12 by crutches in order to avoid the tilting of the vertical form B, in particular under the wind force. In this exemplary embodiment, the access ladder 3 fulfills the function of a crutch but it goes without saying that crutches separate from the scale 3 could be suitable. As illustrated in FIG. 1, the stabilization ballast 2 is mounted opposite the rear face F2 and extends laterally along the axis Y. 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, with four spacer orifices 9 extending perpendicular to the plane defined by the formwork face before F1. Each spacer orifice 9 (Figures 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 formwork B positioned opposite each other in order to ensure the constant thickness of the formwork between the two formwork forms B. The formwork form B has four guide devices 4 mounted on the rear face F2. Each guide device 4 allows the guide of a spacer rod 5 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 formwork face F1 of the formwork panel B. Each rod d spacer 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 tapped part. A clamping nut 6 is adapted to be tightened at 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 support support 42 on which is intended to bear the tightening 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.

Referring to Figures 3 and 5, the housing 41 has a vertical wall 410 in which is formed an orifice aligned with the spacer orifice 9 of the formwork 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 tightening nut 6 either in plan contact with the support plate in the locking position as illustrated in FIG. 5. The support support 42 comprises 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 allow 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 orifice 9 of the formwork 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 9 during a concrete pouring operation. When a spacer rod 5 must be introduced into the spacer orifice 9, the operator need only manually move the protective member 7 in 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 guiding device 4 according to the invention comprises means for moving the support support 42 relative to the formwork front face F1 of the formwork panel 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. 2 and 3, the pivot rod 43 forms a pivot connection between the upper part of the support support 42 and the housing 41 of the panel B 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 formwork panel B to facilitate the loosening / tightening of the tightening lock 6 as 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 link is configured to allow only a bringing together of the lower part of the support 42 towards the vertical wall 410.

To guide the movement of the support support 42 and pass from a locking position to a release position, the movement means of the guide device 4 further comprise a control member 8 configured to adjust the movement of the support support 42 relative 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 tapped control orifice 45 of the support 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 locked position. In other words, by screwing in or unscrewing the control member 8, the protruding length L1, L2 of the control member 8 is modified and, consequently, the angle of inclination Θ of the support support. 42 with respect 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 threaded 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 translational movement of the control member 8, which accelerates the tightening and release operations.

Unlike the prior art, the control member 8 extends orthogonally to the 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 Θ of the support support 42 in order to release or lock a spacer rod 5 without any strain. An operator can advantageously dispense with using a tightening key to act on the guide device 4.

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

Advantageously, the support 42 is moved away from the tightening nut 6, when the latter is locked, to significantly reduce the mechanical tension in the tightening nut 6, the spacer rod 5 and the support support 42. Indeed, by moving the support support 42, the latter no longer exerts any mechanical force on the tightening nut 6. It is then possible to unscrew the tightening nut 6 and remove the spacer rod 5 easily, without excessive effort. Reciprocally, the support 42 can be brought closer to the tightening nut 6, when the latter is released, in order to tighten the tightening nut 6 with the spacer rod 5 and the support support 42. The operator can advantageously carry out all operations using a screwdriver, without strenuousness and ergonomically.

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 in the guide opening 44 of the support support 42 and in the spacer orifice 9. Thanks to the pivot connection , the support 42 is inclined relative to the formwork front face F1. The tightening nut 6 is spaced from the support support 42 as illustrated in FIG. 3. The control member 8 is screwed into the control orifice 45 of the support support 42. Its distal end 82 extends protruding by 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 tightening nut 6 to bring it into contact with the 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 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 formwork front face F1. The support 42 pivots to constrain the tightening nut 6, which locks the position of the spacer rod 5 as illustrated 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 shuttering 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 tightening nut 6.

Once the concrete has been poured into the formwork, the thrust of the concrete is exerted in a similar manner to the prior art. Mechanical tension is created between the tightening nut 6, the spacer rod 5 and the guide device 4. After the concrete has dried and hardened, the concrete no longer exerts any thrust on the formwork face F1 of the formwork formwork B. However, the mechanical tension between the tightening nut 6, the spacer rod 5 and the guide device 4 remains. To remove the spacer rod 5, the operator once again cooperates his screwdriver 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 'apart from the vertical wall 410 so that the support 42 is inclined to the formwork front face F1. The support 42 pivots to move away from the tightening nut 6, which releases the 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 formwork (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 device (4) for guiding a spacer rod (5) through the spacer orifice (9), said guide device (4) comprising a support 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) relative 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 formwork front face (F1), the control member (8) having a proximal end (81), co configured to be rotated by a screwdriver or the like, extending orthogonally to the support support (42). 2. Formwork formwork (B) according to claim 1, wherein, the support support (42) comprising a threaded control orifice (45), the control member (8) is in the form of a threaded screw mounted in the threaded control orifice (45). 3. shuttering formwork (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 formwork (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 formwork (B) according to one of claims 1 to 3, in which the support support (42) is configured to tilt relative to the formwork front face (F1), preferably an angle of inclination Θ greater than 3 °. 5. Formwork formwork (B) according to one of claims 1 to 4, in which the proximal end (81) of the control member (8) is in the form of a polygonal head, in particular, a hexagonal head. 6. Formwork formwork (B) according to one of claims 1 to 5, in which the support support (42) comprises, at a first end, a pivot connection so as to tilt the support support (42) with respect to the formwork front face (F1). 7. Formwork formwork (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 formwork (B) according to one of claims 1 to 7, in which 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 panel (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. Method of removing a spacer rod (5) mounted between two formwork forms (B) facing each other, at least one formwork form (B) being defined according to one of claims 1 to 8, a tightening nut (6) being in contact with the support support (42) of the formwork panel (B) to lock the position of the spacer rod (5), 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 of so as to move the support support (42) away from the tightening nut (6) in order to release the mechanical tension in the tightening nut (6). 10. Method for locking a spacer rod (5) mounted between two formwork forms (B) facing each other, at least one formwork formwork (B) being defined according to one of claims 1 to 8, a clamping nut (6) being spaced from the support 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 of so as to force the support support (42) against the tightening nut (6) in order to increase the mechanical tension in the tightening nut (6).