Principle of dismountable mechanical assembly, intended for the rapid construction of structures in tubes, tubes and plates or profiles

Abstract

The present invention relates to a rapid assembly principle for rigidly connecting tubes together, as well as tubes and plates or profiles, to create removable structures, such as scaffolding and metal construction. This principle provides a fit between the parts to be assembled, making it possible to reduce the number of diagonals. The assembly screws are internal; no projection prevents the cladding of the constructions. The assembly consists of: - a yoke or hook fixed to the first part to be assembled, - a specific screw with a conical section, present in the second part to be assembled, perpendicular to the plane of the yoke (or hook). The screw is placed inside two rings secured to the second part to be assembled. The head of the screw slides freely in one of the rings; the other ring is tapped, and receives the threaded part of the screw.When tightening the screw, the conical part of the screw, resting on a suitable surface inside the bore of the clevis (or hook), exerts a tensile force in the plane of the latter. The traction very firmly grips the parts to be assembled. The elimination of assembly play, obtained by tightening the screw, works in the same way for clevises and hooks; the assembly system can be completely enclosed in the tube which contains the screw and the two rings.

Description

Title of the invention: Principle of removable mechanical assembly, intended for the rapid construction of structures in tubes, tubes and plates or profiles. 1. State of the art

[0001] The solutions available to meet the needs of demountable structures are:

[0002] - bolted scaffolding collars, for smooth round tubes,

[0003] - keyed joints for steel scaffolding, composed of posts with welded cups, and crosspieces with specific end pieces (so-called multidirectional scaffolding),

[0004] - tenon, yoke and smooth pin assemblies for structures in aluminum,

[0005] - the assemblies by wedging of the metal shelves, generally made in open profiles of folded sheet metal,

[0006] - bolted assemblies of classic metal constructions, in tubes and profiles with plates, diagonals or gussets. 2. Disadvantages of available systems:

[0007] - The assembly of scaffolding in tubes and collars is tedious; the scaffolding Multidirectional scaffolding is faster to assemble, but both are difficult to cover (with fabrics or walls) and to arrange (floors, guardrails, etc.). This is due to the assembly parts (cups, collars) which protrude beyond the plane of the tubes, and especially the diagonals which must be placed in a cantilever, outside the construction. For this reason, multidirectional scaffolding requires numerous bracing diagonals, which also suffer from the play essential for their installation. The problem of horizontal bracing is also poorly resolved. Storing cup-mounted posts and crosspieces with their protruding end pieces is very difficult.

[0008] - The assemblies of the aluminum structures (triangular or square "bridges") are suitable for lattice constructions, and do not apply to insulated tubes or bars.

[0009] - Metal shelving is essentially stable in the presence of loads vertical; open profiles have poor torsion resistance and their wedging assembly systems do not withstand successive assembly and disassembly under force.

[0010] - Conventional metal constructions require very long assembly times, due to numerous boltings, and various adjustments linked to the addition of manufacturing clearances. 3. Presentation of the invention

[0011] The object of the invention is a rapid assembly principle for rigidly connecting tubes and plates or profiles, as well as tubes to each other, to produce neat and stable demountable constructions. 4. Proposed solution to the problems posed

[0012] The system which is the subject of the invention provides a fit between the parts to be assembled. The energetic docking of the parts between them makes it possible to reduce the number of diagonals. The assembly screws are internal and the joined parts can be used in all positions, without fear of loosening.

[0013] No projections prevent the cladding of the constructions; the diagonals, when necessary, are in the plane of the structure. The arrangement of the crosspieces, without any protruding parts, is very compact. 5. Detailed description

[0014] The assembly involves four main parts:

[0015] - A flat part (yoke or hook), fixed on one of the elements to be assembled (tube round, square or rectangular, plate, solid piece, etc.),

[0016] - A screw perpendicular to the plane of the yoke (or hook),

[0017] - Two rings which receive the screw.

[0018] These last three components are placed in the other part to be assembled (generally a square or rectangular tube).

[0019] * The flat part is:

[0020] - either closed, forming a ring, called "cape" in this document (1 [Fig.3]),

[0021] - either open, on one side or at the end, called "hook" in this document (2, 5 [Fig.l] and 3 [Fig.3]).

[0022] * The tube to be assembled (4), which can be a crosspiece, a joist, an upright, etc., is called "traverse".

[0023] The yokes or hooks are fixed by one face (6) on one of the parts to be assembled (post 12 [Fig.2]), beam (13 [Fig.2]), tube (14 [Fig.3]), plate (15 [Fig.4]) ... This fixing is definitive (crimping, welding), removable (bolting), or adjustable by means of rails, or regular drillings (see bolting hook 5).

[0024] The crosspiece to be assembled (4) receives at its end, two opposite rings (8 and 9), fixed on the side walls of this tube.

[0025] A specific screw (7), comprising a conical section (10), is placed transversely to the tube, inside the two rings. The head of the screw slides freely in one of the rings (8). The other ring (9) is tapped, and receives the threaded part of the screw.

[0026] Sufficient clearance is provided during manufacturing to easily put the parts in place. assemble.

[0027] When tightening the screw, the conical part of the screw, bearing on a suitable surface (11) inside the bore of the yoke (or hook), exerts a tensile force in the plane of the yoke (or hook).

[0028] The traction very firmly holds the parts to be assembled together. This principle of eliminating assembly play, obtained by tightening the screw, works in the same way for clevises and hooks.

[0029] The use of hooks allows the screws to be placed in the crosspieces in a captive manner, thanks to a shoulder on the outside of the smooth ring (no. 8). Assemblies are faster and the crosspieces are already in place before tightening. Assemblies with yokes use separate screws (18), to be engaged when the crosspiece is positioned.

[0030] The crosspieces assembled on hooks (2 or 5) can have an additional device, produced by a heel (17) placed on the hook, which, depending on the depth of the notch (16) of the crosspiece, locks the latter on the hook when tightening the screw (7).

[0031] The assembly system described above is completely included in the crosspiece. * Assembly :

[0032] In the following description, the classic assembly of a crosspiece between two uprights (or two beams) is taken as an example, in order to distinguish the different possibilities. Clevises or hooks are fixed vertically on their supports. The installation of the crosspieces can be carried out in two ways:

[0033] - By moving the crosspiece from top to bottom, transversely to its axis: the The crosspiece is engaged on a yoke, or hook open upwards. It has a cutout (16) corresponding to the size of the hook (figures 1 and 2). The screw is separate (case of the yoke) or integrated into the crosspiece (case of the open hook). This type of assembly allows a crosspiece to be placed between two fixed elements (very common case [Fig.2]).

[0034] - By moving the crosspiece along its axis: the crosspiece is engaged on a yoke, or an open-ended hook ([Fig.3], 4 and 5). It is a tube without cutting. The screw is separate (18, case of the yoke) or integrated into the crosspiece (case of the open-ended hook).

[0035] A post must be moved aside to install the crosspiece. This type of assembly is suitable for isolated assemblies: handrail on post ([Fig.3]), plate on tube ([Fig.4]), end tubes ([Fig.5]).

[0036] This example does not exclude other configurations. The assemblies can be implemented in all positions (flat, inclined yokes or hooks; oblique crosspieces, etc.).

[0037] For structures requiring diagonals, braced frames are made with two parallel crosspieces connected by oblique bars ([Fig.6]). These frames are used vertically, horizontally, or obliquely. The isolated diagonals are placed in the plane of the crosspieces.

[0038] The crosspieces and braced frames have no protruding parts. They are easy to store. The tools required for assembly are very limited (a single wrench is sufficient). The screws preferably have an internal recess (hexagonal socket head screws, hexalobular, crosshead, etc.). They do not require washers or nuts. * Applications

[0039] This principle makes it possible to assemble structural elements in various configurations (posts and beams, beams and joists, end tubes, parallel, perpendicular or oblique tubes, tubes and plates, etc., in various materials), to create scaffolding-type constructions, support structures for events and shows (stages, grills, stands, etc.), platforms (floor structures, walls, stairs, railings, etc.), furniture, temporary or permanent fittings. Description of the drawings

[0040] The first board shows isometric views of the parts constituting an assembly model ([Fig.l]), and of assemblies, dismantled and assembled, of post and crosspiece, and of beam and joist ([Fig.2]). These assemblies are carried out without moving the supports which receive the crosspieces.

[0041] The second and third drawing boards show isometric views of various end assemblies: handrail on an upright ([Fig.3]), plate on a tube ([Fig.4]) and end-to-end tubes ([Fig.5]).

[0042] The last drawing board ([Fig.6]) shows examples of braced frames, with two parallel crosspieces and diagonals.

Claims

Claims

1. Internal and rapid assembly device for rigidly connecting parts together, the parts being able to be tubes and plates or profiles, to produce removable structures of the scaffolding and metal construction type, characterized in that the assembly uses four main parts: - a yoke (1) or a hook (2, 3) comprising one or more conical bearing surfaces (11), fixed on the first part to be assembled (12, 13, 14, 15) - a specific screw (7) perpendicular to the plane of the yoke (1) or the hook (2, 3) - two rings (8, 9) which receive said screw. The screw (7) comprising a conical section (10) and being present in the second part to be assembled, generally a crosspiece (4), the head of the screw sliding freely in one of the rings (8) the other ring (9) being tapped and receiving the threaded part of the screw.

2. Assembly device according to claim no. 1, characterized in that in the case of an assembly with a hook (2, 3), the smooth ring (8) has on its outer side a shoulder which receives the head of the screw (7), in order to make this screw captive.

3. Device according to claim no. 1, characterized by the possibility of putting the crosspiece (4) in place without separating the parts which receive it, thanks to a cutout (16) corresponding to the size of the hook (2) or the yoke (1).

4. Device according to claim No. 1 and No. 3, characterized by an additional locking, achieved by a heel (17) placed on the hook (2, 5), which, depending on the depth of the notch (16) of the crosspiece, locks the latter on the hook when tightening the screw (7).

5. Device according to claims No. 1, No. 3 or No. 4, characterized by the constitution of braced frames, composed of parallel crosspieces (4), connected by diagonal bars (figure 6).

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