Pneumatic device for stopping the wall between two formwork panels
Patent Information
- Application Number
- FR2023003900
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2023-04-19
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2043-04-19
Smart Images
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Abstract
Description
Title of the invention: Pneumatic device for stopping a wall between two formwork panels technical field
[0001] The present invention relates to the field of concrete construction and relates particularly to a pneumatic wall stop device between two formwork panels. State of the art
[0002] When constructing a concrete structure, building a concrete wall requires the use of formwork panels arranged opposite each other with a spacing between them, this spacing defining the thickness of the concrete wall, with the concrete being poured between the panels. When the concrete wall has lateral walls, wall stops are used to close the lateral sides of the formwork panels and delimit said lateral walls. Such wall stops are also called wall ends.
[0003] Traditionally, wall stops are implemented using metal parts whose lateral sides are equipped with magnetic systems allowing said lateral sides to be fixed to the metal skins constituting the inner faces of the metal formwork panels. These metal parts can be replaced by wooden boards held in place by means of magnetic locking pieces that attach to the skins of the metal formwork panels.
[0004] These techniques for implementing concrete wall stops have several disadvantages, including: the installation and removal times are significant; the use of a lifting device is necessary to handle the metal parts; the wooden boards are discarded after use; it is necessary to have metal parts or wooden boards of a width adapted to the thickness of the concrete wall; significant laitance leaks occur at the concrete wall stops.
[0005] The applicant is aware of a pneumatic sail arresting device that largely resolves the aforementioned drawbacks. This device takes the form of an inflatable tube, that is, a tube closed at both ends, which can be inflated and deflated and which has an outer casing that is watertight against liquid fluids. The inflatable tube is positioned vertically between the skins of the two opposing formwork panels, and then inflated until the casing presses against said skins. Such a pneumatic sail arresting device is lighter, easier to handle, and easier to install and remove. It can accommodate various sail thicknesses because the casing inflates and deflates, and it ensures a good seal between the tubular part of the inflatable tube and the formwork skins during inflation. blood sausage.
[0006] A major drawback remains, however, when the concrete wall to be constructed has a significant height requiring the superposition of two or even more pneumatic wall arresting devices. Indeed, in this case, the pneumatic devices are positioned end-to-end vertically, one above the other; the seal between the tubular sections of the tubes and the hip skins remains adequate, except in the adjacent end sections of two end-to-end tubes where grout leaks may occur. Summary of the invention
[0007] The present invention aims to overcome this drawback by designing a pneumatic sail stop device which ensures optimal sealing over the entire height of the hips when two - or more - superimposed pneumatic devices are put in place to achieve the sail stop.
[0008] To this end, the invention relates to a pneumatic sail arresting device, hereafter referred to as the pneumatic device, which comprises a liquid-tight and inflatable tube defining a tubular wall delimited by a first end portion and a second end portion, the two end portions being closed at their respective ends. According to the invention, the pneumatic device comprises a liquid-tight tubular skirt that covers the first end portion and an end section of the tubular wall contiguous to said first end portion and that extends beyond the end of said first end portion so as to define a sleeve configured to receive by insertion a second end portion and an end section of a tubular wall contiguous to said first end portion of another pneumatic sail arresting device, positioned contiguous to the present pneumatic device.
[0009] Thus, when the hip height requires the presence of two superimposed pneumatic sail stop devices, the second end portion of one of the two pneumatic devices is fitted into the sleeve of the skirt of the other pneumatic device until the end of said second end portion is contiguous with the end of the first end portion of the other pneumatic device. Once the two pneumatic devices are fitted together by means of the skirt and positioned vertically between the two hip skins, they are inflated so that their tubular walls press against said skins. The presence of the skirt in the junction area of the two tubular devices ensures continuous contact with the skins, thus preventing laitance leaks at said junction area.The skirt takes the shape of the tubular wall well when the tube is inflated, because it covers the section. the end of the tubular wall and also an end section of the tubular wall of the other pneumatic sail stop device, the second end portion of which is fitted into the sleeve of the skirt. Furthermore, said skirt advantageously ensures proper positioning of the tubular walls of the two pneumatic devices along the same vertical axis, also contributing to ensuring continuous sealing against the hip skins during inflation of the tubes.
[0010] According to the pneumatic device of the invention, the tubular skirt comprises a proximal end strip which is assembled with the end section of the tubular wall of the tube by means of first assembly means. The first assembly means may be permanent, in which case the skirt is permanently fixed to the end section of the tubular wall of the tube, or, on the contrary, removable, in which case the skirt may be removed from the tube when it is not needed, for example if a single pneumatic device is sufficient or if the first end portion of the tube is positioned on the ground.
[0011] According to one possible embodiment of the pneumatic device that is the subject of the invention, the skirt It includes a distal end strip that is suitable for joining with an end section of the tubular wall adjacent to the second end portion of a bead of a second pneumatic wall arresting device placed adjacent to the present pneumatic device, by means of removable secondary joining means. This will allow the skirt to adhere properly to the tubular wall of the second pneumatic device, in order to prevent the possible introduction of concrete or laitance into the skirt. This will also allow the first end portion of the first pneumatic device to be properly joined to the second end portion of the second pneumatic device, keeping their respective ends properly contiguous.
[0012] According to a first embodiment of the pneumatic device of the invention, the airbag consists of a flexible casing that is impermeable to liquid and gaseous fluids, said casing being slightly extensible. According to a second embodiment of the pneumatic device, the airbag consists of a flexible casing that is impermeable to liquid fluids and slightly extensible, and an inflatable membrane housed within this casing.The term "low stretch" means the possibility of having an elongation of the material of the cover of less than 5% in use, preferably less than 3% in use, said material having an elongation at break of less than 15%, preferably less than 10%, the aim being to maintain the tubular shape of the tube in the inflated state so that during the positioning and inflation of the pneumatic device between the two hips, said tube exerts a suitable pressure on the skins of the hips without risk of said tube deforming and continuing to inflate beyond a certain pressure, which could impair the seal. between the skins of the whitebait and the sausage.
[0013] According to the pneumatic device of the invention, the airbag comprises an inflation element. Furthermore, the airbag comprises a deflation element. The inflation and deflation elements may be identical or separate, according to various possible embodiments.
[0014] According to one embodiment of the pneumatic device of the invention, the tube comprises at least one gripping member. Preferably, this at least one gripping member is arranged on the contour of the tubular wall. Preferably, two gripping members are arranged on the contour of the tubular wall. This will facilitate the handling of the pneumatic device when positioning it vertically and when removing it from the formwork.
[0015] According to one embodiment of the pneumatic device of the invention, the end of the first end portion comprises first assembly members and the end of the second end portion comprises second assembly members, the first and second assembly members being complementary. This will allow the end of the second end portion of a first pneumatic device to be removably assembled with the end of the first end portion of a second pneumatic device, once said second end portion has been inserted into the sleeve of the skirt of the second pneumatic device. Thus, continuity between two contiguous pneumatic devices is guaranteed in all cases.
[0016] According to a preferred embodiment of the pneumatic device of the invention, the skirt is positioned on the side of the lower end portion of the tube when the latter is positioned vertically. This greatly reduces the risk of concrete or laitance rising into the skirt. The reverse is, however, possible, i.e., positioning the skirt on the side of the upper end portion of the tube when positioned vertically, particularly in the presence of the aforementioned removable assembly means.
[0017] The invention also relates to an assembly of at least two pneumatic sail stop devices, a first pneumatic sail stop device comprising a liquid-tight and inflatable tube defining a tubular wall delimited by a first end portion and a second end portion, the two end portions being closed at their respective ends, and at least a second pneumatic sail stop device having the aforementioned characteristics of the invention, the second end portion of said first pneumatic device being adapted to be received by fitting into the sleeve of the skirt of said second pneumatic device, the end of the second end portion of said first pneumatic device being contiguous to the end of the The first end portion of said second pneumatic device. In other words, the first pneumatic device will have all the characteristics of the second pneumatic device, except that it may not have a skirt, while the second device does have this skirt. Preferably, the first pneumatic device will be positioned on the ground during use, and the second pneumatic device(s) will be positioned successively above the first pneumatic device. The reverse is also possible, that is, positioning the first pneumatic device above the second pneumatic device(s). According to one embodiment of said assembly, the first pneumatic sail arresting device also includes all the aforementioned characteristics of the invention, that is, the presence of the skirt in addition to the other characteristics already mentioned. Brief description of the figures
[0018] The features and advantages of the invention will become apparent from the following description, which is supported by figures, including:
[0019] [Fig.1] [Fig.1] illustrates a three-dimensional view of a pneumatic sail stop device according to the invention, before inflation;
[0020] [Fig.2] [Fig.2] illustrates a three-dimensional view of the pneumatic device of the [Fig.l], after inflation;
[0021] [Fig.3] [Fig.3] illustrates a plan view of the pneumatic device of [Fig.1], before inflation;
[0022] [Fig.4] [Fig.4] illustrates a front view of the pneumatic device of [Fig.1] in vertical position, in which is fitted an end part of a second pneumatic sail stop device placed below, before the inflation of said pneumatic devices;
[0023] [Fig. 5] [Fig. 5] illustrates a side view of [Fig. 4], after inflation of said dis positive pneumatics placed vertically between two formwork panels;
[0024] [Fig.6] [Fig.6] illustrates a plan view of a first variant of the device pneumatic sail stop;
[0025] [Fig.7] [Fig.7] illustrates a pneumatic sail stop device exhibiting all the characteristics of the pneumatic device of [Fig.6], except for the presence of the skirt;
[0026] [Fig.8] [Fig.8] illustrates a plan view of a second variant of the device pneumatic sail stop;
[0027] [Fig.9] Fig.9 illustrates a pneumatic sail stop device exhibiting all the characteristics of the pneumatic device of [Fig.8], except for the presence of the skirt. Detailed description
[0028] In the following description, the term pneumatic device refers to the pneumatic sail arresting device that is the subject of the present invention, unless otherwise indicated in the text. Terms such as low, high, lower, and upper, which may be used, will be used with regard to the position of the pneumatic device when it is placed vertically. Furthermore, the same reference numerals will be used to define the same characteristics according to the various embodiments of the pneumatic device.
[0029] Referring to Figures 1 to 3, the pneumatic device 1 comprises a tube 2 having a tubular wall 3 extending along a longitudinal axis XI. The tubular wall 3 is delimited by a first end portion 4 and a second end portion 5, the respective ends 6 and 7 of which are closed to form an inflatable envelope. The tube 2 consists solely of an envelope made of a flexible, slightly stretchable material that is impermeable to liquids and gases. Preferably, the material used for the tube 2 is a polyester fabric coated with polyvinyl chloride nitrile. In one embodiment, the tube 2 could consist of an envelope made of a flexible, slightly stretchable material that is impermeable to liquids, for example, a polyester fabric coated with polyurethane, and an inflatable membrane housed within this envelope.An inflation member 8 such as a valve 9 and a deflation member 10 such as a plug 11 closing an outlet nozzle 12, preferably separate from each other, are arranged on the tubular wall 3 to allow the inflation and deflation of the tube 2. The two end portions 4, 5 have a narrowed shape at their respective ends 6, 7, once the tube 2 has been inflated. Two gripping elements 13, preferably in the form of straps, are arranged on a longitudinal edge 14 of the tubular wall 3, in order to facilitate the handling of the pneumatic device 1. The fabrics used for the manufacture of the cover of the tube 2 have an elongation at break of less than 15%, these being exploited at a maximum of 30% of their capacity in use mode, so that the elongation of the material remains less than 5% during the use of the pneumatic device 1.
[0030] With reference to Figures 1 to 3, the pneumatic device 1 comprises a skirt 15 made of a flexible, slightly stretchable material that is impermeable to liquid fluids, for example, a polyester fabric coated with polyvinyl chloride nitrile. The skirt 15 also has a tubular shape, the cross-section of which in a transverse plane is very slightly larger than the cross-section of the tubular wall 3, a first section 15a of said skirt 15 being fitted onto the first end portion 4 and onto an end section 3a of the tubular wall 3. The skirt 15 comprises a proximal end band 16 which is assembled with the end section 3a of the tubular wall 3 by means of first assembly means 17. According to a preferred embodiment, these first assembly means 17 are permanent and implemented by means of stitching, gluing or welding between said proximal end strip 16 and said end section 3a. However, an alternative is possible with removable first assembly means 17, for example implemented by a zipper (type "ECLAIR"®), a magnetic fastener or a hook and loop fastener (type "VELCRO"®) between the proximal end strip 16 and said end section 3a.
[0031] With regard to Figures 1 to 5, a second section 15b of the skirt 5 extends beyond the end 6 of the first end portion 4 and constitutes a sleeve 18 into which a second end portion 5' of a second pneumatic sail arresting device 19 can be fitted. The second pneumatic sail arresting device 19 can be a pneumatic device 1 or, alternatively, can have only a tube 20 of a design identical to the tube 2 - that is to say, correspond to a pneumatic device 1 which does not, however, have a skirt 15. The tube 20 is intended to have its first end portion 21 resting on the ground 100, as in [Fig. 5]. On this [Fig.5], the second end portion 22 of the sausage 20 is fitted into the sleeve 18 of the pneumatic device 1, the end 23 of the second end portion 22 being contiguous to the end 6 of the first end portion 4.The tubular wall 24 of the tube 20 also has an end section 24a contiguous to the second end portion 22 which is covered by the sleeve 18 of the skirt 15. The second end portion 22 and the end section 24a are engaged in the sleeve 18 of the skirt 15 in the deflated state, then the pneumatic device 1 and the pneumatic sail stop device 19, engaged one into the other, are placed in a vertical position between the two hips 301, 302, a pre-inflation of the two tubes 2, 20 may have been carried out beforehand to give shape to the assembly 200.Once said assembly 200 is properly positioned between the two hips 301, 302, the two tubes 2, 20 are inflated until their tubular walls 3, 24 are pressed against the skins 303, 304 of the two hips 301, 302, the presence of the skirt 15 ensuring continuity of the pressing against said skins 303, 304 between the tubular wall 3 and the tubular wall 6, once the inflation of the tubes 2, 20 is completed. The end 25 of the first end portion 21 of the sausage 20 is in contact with the ground 100, the weight of the assembly 200 crushing said first end portion 21 on the ground 100, which contributes to a suitable pressing of the sausage 20 to the lower ends 303a, 304a of the skins 303, 304 of the two hips 301, 302. Two gripping members 26, preferably identical to the gripping members 13, are also arranged on the tubular wall 24, in order to facilitate handling. of the pneumatic sail stop device 19. The tube 20 also includes an inflation member 8' and a deflation member 10', similar to the inflation members 8 and deflation members 10 on the tube 2.
[0032] On [Fig.5], the presence of the pneumatic wall stop device 19 and the pneumatic device 1 is sufficient to cover the height of the formwork panels 301, 302. For a greater height, the assembly 200 may include one, two or even more than two additional pneumatic devices 1 which will then be placed successively, in the same way as described above, above the two pneumatic devices 19, 1 already present. In this case, the second end portion 5 and the end section 3b of the tubular wall 3 of the pneumatic device 1 already in place will be fitted into the skirt 15 of a second pneumatic device 1 so that the end 7 of its second end portion 5 is placed contiguously to the end 6 of the first end portion 4 of said second pneumatic device 1. And so on, if other pneumatic devices 1 are needed to cover the entire height between the two formwork panels 301, 302.
[0033] In [Fig. 5], the pneumatic wall-stopping device 19 could be replaced by a pneumatic device 1, in which case the skirt 15 of the pneumatic device 1 located on the lower side would be crushed onto the ground 100. It would also be possible to provide in [Fig. 5] for an inversion of the assembly 200 located between the two formwork panels 301, 302, that is to say, to position the end 7 of the second portion of the end 5 of the bead 2 in contact with the ground 100 and to position the end 25 of the first portion of the end 21 of the bead 20 on the upper side of the formwork panels 301, 302. Similarly, if more than one pneumatic device 1 is necessary on the assembly 200 in order to cover the entire height of the formwork panels 301, 302.
[0034] In order to ensure contiguous retention between the end 7 of a second end portion 5 of a tube 2 of a first pneumatic device 1 or the end 23 of a second end portion 22 of a tube 20 of a pneumatic sail stop device 19, on the one hand, and the end 6 of a first end portion 4 of a tube 2 of a second pneumatic device 1, on the other hand, it is possible to provide first and second removable assembly members, which are implemented in Figures 6 and 7 by two snap hooks 27 mounted at the end 7 of the second end portion 5 and at the end 23 of the second end portion 22 and by triangular rings 28 mounted at the end 6 of the first end portion 4 of the tube 2. The snap hooks 27 and the triangular rings 28 could be replaced, for example, by male and female connectors that snap into each other.
[0035] In order to ensure that the distal end 29 of the skirt 15 of a first pneumatic device 1 remains in contact with the tubular wall 3 of the tube 2 of a second Pneumatic device 1 or tubular wall 24 of tube 20 of a pneumatic sail stop device 19, removable assembly means can be implemented. As shown in Figures 8 and 9, the skirt 15 includes a distal end band 30 intended to be assembled with a complementary band 31 arranged on the end section 3b of the tubular wall 3 of tube 2 or on the end section 24a of the tubular wall 24 of tube 20. This assembly can be achieved by means of magnetic attraction (magnetic bands) or by means of loops / hooks (of the "VELCRO"® type) between the two bands 30, 31, or even by means of a zipper (of the "ECLAIR"® type).This could prevent concrete laitance infiltration inside the skirt 15 and also contribute to a contiguous hold between the end 7 of a second end portion 5 of a bead 2 of a first pneumatic device 1 or the end 23 of a second end portion 22 of a bead 20 of a pneumatic wall stop device 19, on the one hand, and the end 6 of a first end portion 4 of a bead 2 of a second pneumatic device 1, on the other hand.
Claims
Claims
1. Pneumatic sail-stopping device (1) comprising a liquid-tight and inflatable tube (2) defining a tubular wall (3) delimited by a first end portion (4) and a second end portion (5), the two end portions (4, 5) being closed at their respective ends (6, 7), characterized in that said pneumatic device (1) comprises a liquid-tight tubular skirt (15) which covers the first end portion (4) and an end section (3a) of the tubular wall (3) contiguous to said first end portion (4) and which extends beyond the end (6) of said first end portion (4) so as to define a sleeve (18) configured to receive by fitting a second end portion (5, 22) and an end section (24a, 3b) of a tubular wall (24, ... of another pneumatic sail-stopping device (19, 1),positioned contiguously to the present pneumatic device (1).,
2. Pneumatic sail-stopping device (1) according to claim 1, wherein the skirt (15) comprises a proximal end strip (16) which is assembled with the end section (3a) of the tubular wall (3) of the sausage (2) by means of first assembly means (17), said first assembly means being able to be permanent or removable.
3. A pneumatic sail-stopping device (1) according to any one of claims 1 or 2, wherein the skirt (15) comprises a distal end strip (30) which is adapted to be assembled with an end section (3b, 24a) of the tubular wall (3, 24) contiguous to the second end portion (5, 22) of a flange (2, 20) of a second pneumatic sail-stopping device (1, 19) placed contiguously with the present pneumatic device (1), by means of second removable assembly means.
4. Pneumatic sail-stopping device (1) according to any one of claims 1 to 3, in which the tube (2) is made of a flexible envelope impervious to liquid and gaseous fluids and having an elongation of less than 5% in use and an elongation at break of less than 15%.
5. A pneumatic sail-stopping device (1) according to any one of claims 1 to 3, wherein the tube (2) is made of a flexible envelope impermeable to liquid fluids and having an elongation of less than 5% in use and an elongation at break of less than 15% and an inflatable membrane housed in said envelope.
6. A pneumatic sail-stopping device (1) according to any one of claims 1 to 5, wherein the tube (2) comprises an inflation member (8).
7. A pneumatic sail-stopping device (1) according to any one of claims 1 to 6, wherein the tube (2) comprises a deflation member (10).
8. Pneumatic sail-stopping device (1) according to any one of claims 1 to 7, wherein the tube (2) comprises at least one gripping member (13), preferably arranged on the contour of the tubular wall (3).
9. A pneumatic sail-stopping device (1) according to any one of claims 1 to 8, wherein the end (6) of the first end portion (4) comprises first assembly members (28) and the end (7) of the second end portion (5) comprises second assembly members (27), the first assembly members and the second assembly members being complementary.
10. Pneumatic sail stopping device (1) according to any one of claims 1 to 9, wherein the skirt (15) is positioned on the side of the lower end portion (4) of the sausage (2).
11. Set (200) of at least two pneumatic sail-stopping devices (1, 19), a first pneumatic sail-stopping device (19) comprising a liquid-tight and inflatable tube (20) defining a tubular wall (24) delimited by a first end portion (21) and a second end portion (22), the two end portions (21, 22) being closed at their respective ends (25, 23), and at least one second pneumatic sail-stopping device (1) having the characteristics of any one of claims 1 to 10, the second end portion (22) of said first pneumatic device (19) being capable of being received by fitting into the sleeve (18) of the skirt (15) of said second pneumatic device (1),the end (23) of the second end portion (22) of said first pneumatic device (19) being contiguous to the end (6) of the first end portion (4) of said second pneumatic device (1).,
12. An assembly (200) according to claim 11, wherein the first pneumatic sail stop device (19) also comprises the features of any one of claims 1 to 10.