EP2604775B1 - Form panel comprising a device for guiding a spacer stem - Google Patents
Form panel comprising a device for guiding a spacer stem Download PDFInfo
- Publication number
- EP2604775B1 EP2604775B1 EP20120008223 EP12008223A EP2604775B1 EP 2604775 B1 EP2604775 B1 EP 2604775B1 EP 20120008223 EP20120008223 EP 20120008223 EP 12008223 A EP12008223 A EP 12008223A EP 2604775 B1 EP2604775 B1 EP 2604775B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spacer
- support
- panel
- bearing support
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 125000006850 spacer group Chemical group 0.000 title claims description 79
- 238000009415 formwork Methods 0.000 claims description 72
- 238000000034 method Methods 0.000 claims description 4
- 238000009416 shuttering Methods 0.000 description 13
- 238000006073 displacement reaction Methods 0.000 description 11
- 230000004913 activation Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
- E04G17/0642—Devices for extracting or inserting wall ties or parts thereof
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/002—Workplatforms, railings; Arrangements for pouring concrete, attached to the form
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
- E04G17/065—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
- E04G17/0651—One-piece elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
- E04G17/065—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
- E04G17/0651—One-piece elements
- E04G17/0652—One-piece elements fully recoverable
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
- E04G2011/067—Integrated forms comprising shuttering skin, bracing or strutting arrangements, workplatforms and railings
Definitions
- the invention relates to the field of construction formwork, and more particularly the formwork shuttering.
- a panel conventionally comprises a wall, a front face, called formwork face, is intended to extend inside the formwork to come into contact with the material cast in the formwork.
- the wall of the panel has a plurality of orifices therethrough transversely in each of which a spacer can be inserted.
- a device for guiding a spacer rod is conventionally attached to the rear face of the wall of the box facing 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.
- an operator grasps a spacer rod by its proximal end 11 and introduces its distal end 12 into a first guiding device 4 of the first panel B1 so that the spacer rod 1 enters a first spacer hole 2 of the first panel B1 substantially perpendicular to the first form face AV1.
- the operator then introduces the distal end 12 of the spacer rod 1 into a spacer hole 2 of the second panel B2 so that it is received and locked in the second guide device 4 of the second panel B2.
- each guiding device 4 comprises a support plate 41 parallel to the formwork front face AV1, AV2 on which the clamping nut 3 comes to rest. In position locked, the spacer rod 1 keeps the form faces AV1, AV2 parallel to each other as shown in FIG. figure 1 .
- an operator To remove a spacer rod 1, an operator conventionally uses a key to apply a loosening torque to the clamping nut 3 from the rear face AR1 of the first panel B1. Due to the mechanical tension, the clamping nut 3 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 3, 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 such an extension tube.
- the withdrawal time of a spacer rod 1 is increased which is detrimental. In extreme cases, when the use of an extension attachment does not make it possible to loosen the clamping nut 3, the operator is forced to cut the clamping nut 3 in order to remove the spacer rod 11 and thus release the B1, B2 banches.
- the present invention aims to eliminate at least some of these disadvantages to improve the removal of a spacer rod connecting two shuttering formwork after use.
- the invention relates to a shuttering panel comprising a formwork front face in which is formed at least one spacer hole and a rear face on which is mounted a device for guiding a spacer rod through said orifice spacer, 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 spacer; support support with respect to the formwork front face of the formwork.
- 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.
- the support support 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.
- the displacement means are adapted to incline the support support relative to the formwork front face of the formwork.
- Only a portion of the support support is movable which facilitates the design of the guide device and extends its life.
- the displacement means are adapted to move the support support parallel to the formwork front face of the formwork.
- 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.
- the support support comprises a guide orifice of a spacer rod in order to precisely guide the spacer rod.
- the guide orifice is in the form of a groove, preferably vertical, to allow the inclination of the support support while guiding the spacer rod.
- the displacement means comprise a pivot rod adapted to rotate the support support relative to the formwork front face.
- a guide device with a pivot rod is robust which improves its service life.
- the displacement means comprise an inclination rod rotatably mounted relative to the bearing support, the inclination rod comprising at least one cam whose circumferential surface is arranged to bear against a stop portion of the herehe.
- the displacement of the support support is controlled by modifying the angular position of the inclination rod in an easy and practical manner.
- the invention further relates to a method of removing a spacer rod mounted between two shuttering boxes opposite, at least one of the panels having a spacer hole and a guiding device in which is mounted the spacer rod through said spacer port, said guide device having a bearing support on which is tightened a clamping nut locking the position of the spacer rod in said spacer hole, wherein the support support is moved relative to the formwork front face of the formwork so that the support support is spaced from the clamping nut and the spacer rod is removed.
- the mechanical tension relative to the support support is released prior to removal of the spacer rod which accelerates the withdrawal and limits the physical fatigue of the operator.
- 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.
- FIG. 3 a formwork shuttering B comprising a vertical wall 20, defining a formwork front face AV which is flat and a rear face AR opposite to the flat front face AV.
- wall 20 is meant a thickness of the panel B formed of one or more panels, identical or different.
- the vertical wall 20 of the wall B is pierced, in this example, four spacer holes 2 extending perpendicularly to the plane defined by the formwork front side AV. Each spacer hole 2 is adapted to receive a spacer 1 for adjusting the parallelism of AV formwork faces of the panels B vis-Ã -vis to ensure the constant thickness of the formwork between the two panels B.
- the spacer 1 is in the form of an elongated body intended to extend transversely, in the use position, through the formwork surfaces AV of two panels B vis-Ã -vis.
- Each spacer 1 has a proximal end 11 to be manipulated by an operator and a distal end 12 having a thread to allow its screwing into a complementary threaded portion.
- a clamping nut 3 is screwed to the proximal end 11 of the spacer rod 1 to lock it in position.
- formwork board B comprises a device 5 for guiding a spacer rod 1 mounted on its rear face AR to allow the guide of a spacer rod 1 in a spacer hole 2 of the formwork board B.
- a housing 21 is formed in the rear face AR of the wall 20 of the box B to accommodate the guide device 5 as shown in FIG. figure 4 .
- the guiding device 5 comprises a support support 51 on which is intended to rest the clamping nut 3 when the latter is screwed to the proximal end 11 of the spacer rod 1.
- the bearing support 51 is in the form of a support plate 51 which is flat and which extends substantially vertically so that the nut 3 is in plane contact with the support plate 51 when the latter is screwed.
- the support plate 51 has a guide through orifice 52 in which the spacer rod 1 is intended to extend in the clamping position.
- the guide through orifice 52 is in the form of a substantially vertical groove ( Figure 4 ).
- the guiding device 5 comprises means for moving the support support 51 relative to the front formwork AV of the panel B.
- these means when the latter is screwed in, it is possible to move the support support 51 away from the clamping nut 3, in order to significantly reduce the mechanical tension in the clamping nut 3, the spacer rod 1 and the support support 51. Indeed, by moving the support support 51, it no longer exerts mechanical force on the clamping nut 3. It can then unscrew the clamping nut 3 and remove the spacer rod 1 easily, without excessive effort.
- the displacement means include, in this example, a pivot rod 6 adapted to allow the inclination of the support support 51 relative to the front formwork AV of the panel B.
- the pivot rod 6 extends horizontally and is mounted in guide holes 53 of the guiding device 5 ( Figure 7B ) and in guide lights 23 ( Figure 4 ) of housing 21 of panel B.
- the pivot rod 6 forms a pivot connection between the upper part of the support support 51 and the housing 21 of the B form to allow angular displacement of the lower part of the support support 51.
- the support support 51 can tilt relative to the front formwork front AV of the B-side to facilitate the loosening the clamping lock 3 as will be presented later.
- the guiding device 5 comprises a base 50 in the shape of a U, integral with the support support 51, which is mounted in the housing 21 of the panel B.
- the guide lights 53 of the guiding device 5 are formed in the lateral parts of the base 50 of the guiding device 5.
- the displacement means of the guide device 5 further comprises a tilt rod 7, rotatably mounted relative to the device 5, on which are mounted integrally two cams 8 whose circumferential surface 81 is arranged to bear against an abutment portion 22 of the wall B as shown in FIG. figure 6 .
- Such cams 8 advantageously make it possible to modify the distance between the lower part of the support support 51 and the abutment portion 22 so as to modify the inclination of the support support 51.
- the inclination of the support support 51 is as a function of the angular position of the inclination rod 7.
- the inclination rod 7 extends in a horizontal housing formed in the guiding device 5 and comprises, at one of its ends, an activation head which is, in this example, of hexagonal shape so that it can be turned with a key.
- the shape of the activation head is similar to the shape of the clamping portion of the clamping nut 3 so that the inclining rod 7 and the clamping nut 3 can be rotated. by the same key.
- the cams 8 comprise a circumferential surface 81 adapted to be in contact with an abutment portion 22 of the panel B so as to move the support support 51 away from the wall 20 as a function of the angular position of the cams 8.
- each guide device 1 When placing the formwork, before the concrete is poured into the formwork, the support 51 of each guide device 1 is locked in a vertical position so as to extend parallel to the formwork front face AV of the panel B.
- an operator adjusts the angular position of the tilt rod 7 so that the cams 8 rest on the abutment portion 22 of the panel B.
- the support support 51 extends in accordance with the prior art.
- the operator can then introduce a spacer rod 1 and lock it in position by means of a clamping nut 3 resting on the vertical surface of the support support 51.
- the cams 8 In formwork position, the cams 8 are in position. abutment with section B according to abutment portion 22.
- the rotation R of the inclination rod 7 allows the inclination of the lower part of the support support 51, the upper part of the support support 51 being rotatably mounted relative to the B part thanks to the pivot rod 6.
- the rotation of the cam 8 allows the tilt rod 7 to be closer to the formwork side of the panel B.
- the support support 51 can then incline an angle of inclination with respect to the formwork front face AV as shown in FIG. figure 6 , the lower part of the support support 51 moving towards the front formwork AV. Since the guide aperture 52 of the support 51 extends vertically, the inclination of the support 51 has no disadvantage for the spacer rod 1, the sliding guide opening 52 vertically around the spacer rod 1.
- the tilt rod 7 comprises in this example two cams 8 but it goes without saying that it could include only one or more cams 8.
- the displacement means are adapted to incline the support support 51 relative to the front panel formwork AV of the B board but it goes without saying that they could also be adapted to move the support support 51 parallel to the front panel formwork AV of the form B.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Description
L'invention concerne le domaine des coffrages de construction, et plus particulièrement les banches de coffrage.The invention relates to the field of construction formwork, and more particularly the formwork shuttering.
On connaît un coffrage de construction comprenant une pluralité de banches et dans lequel est coulé un matériau durcisseur tel que du béton.There is known a construction formwork comprising a plurality of panels and in which is poured a hardener material such as concrete.
Une banche comprend conventionnellement une paroi dont une face avant, appelée face coffrante, est destinée à s'étendre intérieurement au coffrage pour venir en contact avec le matériau coulé dans le coffrage. La paroi de la banche comporte une pluralité d'orifices la traversant transversalement dans chacun desquels une entretoise peut être insérée. L'utilisation des telles entretoises permet d'ajuster le parallélisme de faces coffrantes de banches en vis-à -vis afin de s'assurer de l'épaisseur constante du coffrage de construction entre les deux banches. Un dispositif de guidage d'une tige d'entretoise est classiquement fixé à la face arrière de la paroi de la banche en regard de chaque orifice d'entretoise de la banche. Une tige d'entretoise comporte, de manière classique, une extrémité proximale permettant d'être manipulée par un opérateur et une extrémité distale comportant un filetage pour permettre son vissage dans une partie taraudée complémentaire.A panel conventionally comprises a wall, a front face, called formwork face, is intended to extend inside the formwork to come into contact with the material cast in the formwork. The wall of the panel has a plurality of orifices therethrough transversely in each of which a spacer can be inserted. The use of such spacers makes it possible to adjust the parallelism of shuttering faces of panels opposite to ensure the constant thickness of the formwork between the two panels. A device for guiding a spacer rod is conventionally attached to the rear face of the wall of the box facing 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.
En référence à la
Lorsque du béton à l'état pâteux est introduit dans le coffrage (coulage du béton), le béton exerce des forces de poussée F sur les faces coffrantes AV1, AV2 qui tendent à écarter les banches B1, B2 l'une de l'autre comme illustré sur la
Pour retirer une tige d'entretoise 1, un opérateur utilise de manière classique une clé pour appliquer un couple de desserrage à l'écrou de serrage 3 depuis la face arrière AR1 de la première banche B1. Du fait de la tension mécanique, l'écrou de serrage 3 est fermement verrouillé et l'opérateur est contraint de forcer pour appliquer un couple de desserrage suffisant. Lorsque l'opérateur ne peut pas desserrer l'écrou de serrage 3, il est contraint d'ajouter un accessoire pour rallonger sa clé et ainsi allonger le bras de levier de la clé de manière à appliquer un couple de desserrage plus important. Cette mise en oeuvre est particulièrement contraignante car elle impose à l'opérateur de disposer d'un tel tube de rallonge. En outre, la durée de retrait d'une tige d'entretoise 1 est augmentée ce qui est préjudiciable. Dans des cas extrêmes, lorsque l'utilisation d'un accessoire de rallonge ne permet pas de desserrer l'écrou de serrage 3, l'opérateur est contraint de sectionner l'écrou de serrage 3 afin de retirer la tige d'entretoise 11 et ainsi libérer les banches B1, B2.To remove a
La présente invention vise à éliminer au moins certains de ces inconvénients pour améliorer le retrait d'une tige d'entretoise reliant deux banches de coffrage après utilisation.The present invention aims to eliminate at least some of these disadvantages to improve the removal of a spacer rod connecting two shuttering formwork after use.
A cet effet, l'invention concerne une banche de coffrage comportant une face avant coffrante dans laquelle est formé au moins un orifice d'entretoise et une face arrière sur laquelle est monté un dispositif de guidage d'une tige d'entretoise à travers ledit orifice d'entretoise, ledit dispositif de guidage comportant un support d'appui adapté pour être en contact avec un écrou de serrage verrouillant la position de la tige d'entretoise dans ledit orifice d'entretoise, le dispositif de guidage comportant des moyens de déplacement du support d'appui par rapport à la face avant coffrante de la banche.For this purpose, the invention relates to a shuttering panel comprising a formwork front face in which is formed at least one spacer hole and a rear face on which is mounted a device for guiding a spacer rod through said orifice spacer, 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 spacer; support support with respect to the formwork front face of the formwork.
Grâce aux moyens de déplacement, on peut libérer la tension de serrage du support d'appui ce qui facilite le desserrage de l'écrou de serrage et donc le retrait de la tige d'entretoise.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.
De préférence, les moyens de déplacement sont agencés pour déplacer le support d'appui entre :
- une première position de verrouillage dans laquelle le support d'appui s'étend parallèlement à la face avant coffrante de la banche et à une distance de verrouillage prédéterminée de la face coffrante avant et
- une deuxième position de libération dans laquelle le support d'appui s'étend au moins partiellement à une distance de libération inférieure à ladite distance de verrouillage.
- a first locking position in which the support support extends parallel to the formwork front face of the formwork 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.
En rapprochant le support d'appui de la face avant coffrante, on écarte le support d'appui de l'écrou de serrage ce qui permet de diminuer la tension mécanique entre l'écrou et le support d'appui.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.
Selon un aspect de l'invention, les moyens de déplacement sont adaptés pour incliner le support d'appui par rapport à la face avant coffrante de la banche.According to one aspect of the invention, the displacement means are adapted to incline the support support relative to the formwork front face of the formwork.
Seule une partie du support d'appui est mobile ce qui facilite la conception du dispositif de guidage et allonge sa durée de vie.Only a portion of the support support is movable which facilitates the design of the guide device and extends its life.
Selon un autre aspect de l'invention, les moyens de déplacement sont adaptés pour déplacer le support d'appui parallèlement à la face avant coffrante de la banche.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.
De manière préférée, le support d'appui se présente sous la forme d'une plaque plane et permet avantageusement un contact plan avec l'écrou de serrage ce qui sécurise son serrage.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.
De préférence, le support d'appui comporte un orifice de guidage d'une tige d'entretoise afin de guider précisément la tige d'entretoise. De manière préférée, l'orifice de guidage se présente sous la forme d'une rainure, de préférence verticale, pour permettre l'inclinaison du support d'appui tout en guidant la tige d'entretoise.Preferably, the support support comprises a guide orifice of a spacer rod in order to precisely guide the spacer rod. Preferably, the guide orifice is in the form of a groove, preferably vertical, to allow the inclination of the support support while guiding the spacer rod.
De préférence encore, les moyens de déplacement comportent une tige de pivot adaptée pour faire pivoter le support d'appui par rapport à la face avant coffrante. Un dispositif de guidage avec une tige de pivot est robuste ce qui améliore sa durée de vie.More preferably, the displacement means comprise a pivot rod adapted to rotate the support support relative to the formwork front face. A guide device with a pivot rod is robust which improves its service life.
De préférence toujours, les moyens de déplacement comportent une tige d'inclinaison montée rotative par rapport au support d'appui, la tige d'inclinaison comportant au moins une came dont la surface circonférentielle est agencée pour venir en appui sur une partie de butée de la banche. De manière avantageuse, on commande le déplacement du support d'appui (inclinaison, translation, etc.) en modifiant de manière aisée et pratique la position angulaire de la tige d'inclinaison.Preferably still, the displacement means comprise an inclination rod rotatably mounted relative to the bearing support, the inclination rod comprising at least one cam whose circumferential surface is arranged to bear against a stop portion of the banche. Advantageously, the displacement of the support support (inclination, translation, etc.) is controlled by modifying the angular position of the inclination rod in an easy and practical manner.
L'invention concerne en outre un procédé de retrait d'une tige d'entretoise montée entre deux banches de coffrage en vis-à -vis, au moins une des banches comportant un orifice d'entretoise et un dispositif de guidage dans lequel est montée la tige d'entretoise à travers ledit orifice d'entretoise, ledit dispositif de guidage comportant un support d'appui sur lequel est serré un écrou de serrage verrouillant la position de la tige d'entretoise dans ledit orifice d'entretoise, procédé dans lequel on déplace le support d'appui par rapport à la face avant coffrante de la banche de manière à ce que le support d'appui soit écarté de l'écrou de serrage et on retire la tige d'entretoise. De manière avantageuse, la tension mécanique relative au support d'appui est libérée préalablement au retrait de la tige d'entretoise ce qui accélère le retrait et limite la fatigue physique de l'opérateur.The invention further relates to a method of removing a spacer rod mounted between two shuttering boxes opposite, at least one of the panels having a spacer hole and a guiding device in which is mounted the spacer rod through said spacer port, said guide device having a bearing support on which is tightened a clamping nut locking the position of the spacer rod in said spacer hole, wherein the support support is moved relative to the formwork front face of the formwork so that the support support is spaced from the clamping nut and the spacer rod is removed. Advantageously, the mechanical tension relative to the support support is released prior to removal of the spacer rod which accelerates the withdrawal and limits the physical fatigue of the operator.
De manière préférée, on incline le support d'appui par rapport à la face avant coffrante de la banche de manière à ce que le support d'appui soit écarté de l'écrou de serrage.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.
Les caractéristiques et avantages de la présente invention apparaîtront plus clairement à la lecture de la description suivante d'une forme de réalisation de l'invention, donnée à titre d'exemple non limitatif, en référence aux dessins annexés correspondants dans lesquels :
- la
figure 1 est une vue en coupe schématique de deux banches de coffrage en vis-à -vis au cours de leur utilisation (déjà commentée) ; - la
figure 2 est une vue en coupe schématique rapprochée du verrouillage d'une tige d'entretoise montée dans une des banches de lafigure 1 (déjà commentée) ; - la
figure 3 est une vue en coupe schématique d'une banche de coffrage selon l'invention ; - la
figure 4 est une vue en perspective du dispositif de guidage d'une tige d'entretoise de la banche de lafigure 3 ; - la
figure 5 est une vue en coupe rapprochée du dispositif de guidage d'une tige d'entretoise de la banche de lafigure 3 ; - la
figure 6 est une vue en coupe rapprochée du mécanisme du dispositif de guidage de lafigure 5 ; - la
figure 7A est une première vue en perspective du dispositif de guidage d'une tige d'entretoise pour une banche de coffrage ; - la
figure 7B est une deuxième vue en perspective du dispositif de guidage d'une tige d'entretoise pour une banche de coffrage ; - la
figure 7C est une troisième vue en perspective du dispositif de guidage d'une tige d'entretoise pour une banche de coffrage ; et - la
figure 7D est une quatrième vue en perspective du dispositif de guidage d'une tige d'entretoise pour une banche de coffrage.
- the
figure 1 is a schematic sectional view of two shuttering formwork vis-Ã -vis during their use (already commented); - the
figure 2 is a close schematic sectional view of the locking of a spacer rod mounted in one of the banches of thefigure 1 (already commented); - the
figure 3 is a schematic sectional view of a shuttering formwork according to the invention; - the
figure 4 is a perspective view of the guide device of a spacer rod of the banche of thefigure 3 ; - the
figure 5 is a close sectional view of the guide device of a spacer rod of the banche of thefigure 3 ; - the
figure 6 is a close sectional view of the mechanism of the guiding device of thefigure 5 ; - the
Figure 7A is a first perspective view of the guide device of a spacer rod for a shuttering formwork; - the
Figure 7B is a second perspective view of the guide device of a spacer rod for a shuttering formwork; - the
Figure 7C is a third perspective view of the guide device of a spacer rod for a shuttering formwork; and - the
Figure 7D is a fourth perspective view of the guide device of a spacer rod for a shuttering formwork.
On a représenté à la
Dans cet exemple, en référence à la
En référence aux
Le dispositif de guidage 5 comporte un support d'appui 51 sur lequel est destiné à s'appuyer l'écrou de serrage 3 lorsque ce dernier est vissé à l'extrémité proximale 11 de la tige d'entretoise 1. Dans cet exemple, en référence à la
Pour éliminer au moins certains des inconvénients de l'art antérieur, le dispositif de guidage 5 selon l'invention comporte des moyens de déplacement du support d'appui 51 par rapport à la face avant coffrante AV de la banche B. Grâce à ces moyens de déplacement, on peut écarter le support d'appui 51 de l'écrou de serrage 3, lorsque ce dernier est vissé, pour diminuer de manière importante la tension mécanique dans l'écrou de serrage 3, la tige d'entretoise 1 et le support d'appui 51. En effet, en déplaçant le support d'appui 51, celui-ci n'exerce plus de d'effort mécanique sur l'écrou de serrage 3. On peut alors dévisser l'écrou de serrage 3 et retirer la tige d'entretoise 1 de manière aisée, sans effort excessif.To eliminate at least some of the drawbacks of the prior art, the guiding
Les moyens de déplacement comportent, dans cet exemple, une tige de pivot 6 adaptée pour permettre l'inclinaison du support d'appui 51 par rapport à la face avant coffrante AV de la banche B. En référence aux
Pour guider le déplacement du support d'appui 51 et passer d'une position de verrouillage à une position de libération, les moyens de déplacement du dispositif de guidage 5 comportent en outre une tige d'inclinaison 7, montée rotative par rapport au dispositif de guidage 5, sur laquelle sont montées solidairement deux cames 8 dont la surface circonférentielle 81 est agencée pour venir en appui sur une partie de butée 22 de la banche B comme représenté sur la
Dans cet exemple, en référence à la
L'utilisation du dispositif de guidage 5 d'une banche B selon l'invention va être maintenant présentée. Lors de la mise en place du coffrage, avant que le béton ne soit coulé dans le coffrage, le support d'appui 51 de chaque dispositif de guidage 1 est verrouillé en position verticale de manière à s'étendre parallèlement à la face avant coffrante AV de la banche B. A cet effet, un opérateur règle la position angulaire de la tige d'inclinaison 7 de manière à ce que les cames 8 soient en appui sur la partie de butée 22 de la banche B. Autrement dit, lors de la mise en place du coffrage, le support d'appui 51 s'étend conformément à l'art antérieur. L'opérateur peut alors introduire une tige d'entretoise 1 et la verrouiller en position au moyen d'un écrou de serrage 3 venant en appui sur la surface verticale du support d'appui 51. En position de coffrage, les cames 8 sont en butée avec la banche B selon la partie de butée 22.The use of the guiding
Une fois le béton coulé dans le coffrage, la poussée du béton s'exerce de manière similaire à l'art antérieur. Une tension mécanique se crée entre l'écrou de serrage 3, la tige d'entretoise 1 et le dispositif de guidage 5. Après séchage et durcissement du béton, le béton n'exerce plus de poussée sur la face coffrante AV de la banche B. Néanmoins, la tension mécanique entre l'écrou de serrage 3, la tige d'entretoise 1 et le dispositif de guidage 5 demeure. Pour retirer la tige d'entretoise 1, l'opérateur agit sur la tige d'inclinaison 7, de préférence au moyen d'une clé, afin de faire tourner les cames 8 de la tige d'inclinaison 7. Ainsi, lors du décoffrage, les cames 8 ne sont plus en contact avec la partie de butée 22 de la banche B comme représenté sur la
En référence à la
Le support d'appui 51 peut alors s'incliner d'un angle d'inclinaison a par rapport à la face avant coffrante AV comme représenté sur la
Lorsque l'opérateur incline le support d'appui 51 du dispositif de guidage 5, la tension mécanique du support d'appui 51 disparaît. Pour retirer la tige d'entretoise 1, l'opérateur utilise de manière classique une clé pour appliquer un couple de desserrage à l'écrou de serrage 3 depuis la face arrière AR de la banche B. Du fait de la faible tension mécanique, il n'est pas nécessaire à l'opérateur d'appliquer un couple de desserrage important, l'écrou de serrage 3 se desserrant de manière rapide avec peu d'effort.When the operator inclines the
La tige d'inclinaison 7 comporte dans cet exemple deux cames 8 mais il va de soi qu'elle pourrait n'en comprendre qu'une unique ou plus de deux cames 8. Dans l'exemple de réalisation, les moyens de déplacement sont adaptés pour incliner le support d'appui 51 par rapport à la face avant coffrante AV de la banche B mais il va de soi qu'ils pourraient également être adaptés pour déplacer le support d'appui 51 parallèlement à la face avant coffrante AV de la banche B. A cet effet, il suffit de prévoir des glissières pour guider le support d'appui 51, une came 8 pouvant être utilisée pour modifier la course du support d'appui 51.The
Claims (10)
- Form panel (B) comprising a front formwork surface (AV) in which is formed at least one spacer orifice (2) and a rear surface (AR) on which is mounted a guide device (5) for guiding a spacer rod (1) through said spacer orifice (2), said guide device (5) comprising a bearing support (51) adapted to be in contact with a clamping nut (3) which locks the position of the spacer rod (1) in said spacer orifice (2), said panel being characterised in that the guide device (5) comprises means for displacing the bearing support (51) relative to the front formwork surface (AV) of the panel (B).
- Panel according to claim 1, wherein the displacing means are adapted to displace the bearing support (51) between:- a first locking position in which the bearing support extends parallel to the front formwork surface (AV) of the panel (B) and at a predetermined locking distance from the front formwork surface and- a second release position in which the bearing support (51) extends at least partially at a release distance that is less than said locking distance.
- Panel according to one of claims 1 or 2, wherein the displacing means are adapted to tilt the bearing support (51) relative to the front formwork surface (AV) of the panel (B).
- Panel according to one of claims 1 to 3, wherein the displacing means are adapted to displace the bearing support (51) parallel to the front formwork surface (AV) of the panel (B).
- Panel according to one of claims 1 to 4, wherein the bearing support (51) is in the form of a flat sheet.
- Panel according to one of claims 1 to 5, wherein the bearing support (51) comprises a guide orifice (52) for a spacer rod (1).
- Panel according to one of claims 1 to 6, wherein the displacing means comprise a pivot rod (6) adapted to pivot the bearing support (51) relative to the front formwork surface (AV).
- Panel according to one of claims 1 to 7, wherein the displacing means comprise a tilting rod (7) mounted to be rotatable relative to the bearing support (51), the tilting rod (7) comprising at least one cam (8), the circumferential surface (81) of which is arranged to bear on an abutment portion (22) of the panel (B).
- Method for withdrawing a spacer rod (1) fitted between two opposing form panels (B), at least one of the panels (B) comprising a spacer orifice (2) and a guide device (5) in which the spacer rod (1) is fitted through said spacer orifice (2), said guide device (5) comprising a bearing support (51) onto which is clamped a clamping nut (3) locking the position of the spacer rod (1) in said spacer orifice (2),
the method comprising:- displacing the bearing support (51) relative to the front formwork surface (AV) of the panel (B) so that the bearing support (51) is moved away from the clamping nut (3); and- withdrawing the spacer rod (1). - Method according to claim 9, wherein the bearing support (51) is tilted relative to the front formwork surface (AV) of the panel (B) so that the bearing support (51) is moved away from the clamping nut (3).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1161743A FR2984385B1 (en) | 2011-12-16 | 2011-12-16 | FORMING BANK HAVING A DEVICE FOR GUIDING A SPINDLE ROD |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2604775A1 EP2604775A1 (en) | 2013-06-19 |
EP2604775B1 true EP2604775B1 (en) | 2015-02-11 |
Family
ID=47325772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20120008223 Active EP2604775B1 (en) | 2011-12-16 | 2012-12-10 | Form panel comprising a device for guiding a spacer stem |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2604775B1 (en) |
FR (1) | FR2984385B1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3035905B1 (en) * | 2015-05-07 | 2018-07-13 | Outinord St Amand | BANK AND FORMWORK CONTAINING SUCH A BANK |
FR3080132B1 (en) * | 2018-04-17 | 2020-05-01 | Sateco | FORMWORK BENCH COMPRISING A DEVICE FOR GUIDING A SPACER ROD |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2751358B3 (en) * | 1996-07-19 | 1998-09-18 | Outinord St Amand | DEVICE FOR MAINTAINING FORMWORK PANELS, OF ADJUSTABLE TYPE |
DE102006023062A1 (en) * | 2006-05-10 | 2007-11-15 | Robusta-Gaukel Gmbh & Co. Kg | Clamping device for anchor rods of concrete formwork |
FR2944329A1 (en) * | 2009-04-10 | 2010-10-15 | Sateco Sa | Assembly device for spacers of concrete shell molding device, has tapping for screwing nut on threaded rod, bearing supported against washer, and trimming for reduction of frictions interposed between bearing and washer |
DE102010003017A1 (en) * | 2010-03-18 | 2011-09-22 | Peri Gmbh | Anchor nut and method for anchor setting and anchor release |
-
2011
- 2011-12-16 FR FR1161743A patent/FR2984385B1/en active Active
-
2012
- 2012-12-10 EP EP20120008223 patent/EP2604775B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP2604775A1 (en) | 2013-06-19 |
FR2984385A1 (en) | 2013-06-21 |
FR2984385B1 (en) | 2014-05-23 |
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