SI9500105A - Furniture connection betveen thermoplastic non-metal round pipes and pipe joints - Google Patents

Abstract

The purpose of the invention is to conceive a simplest and cheapest possible furniture assembly which will enable a fast but still enough reliable mutual connection, in any case capable of disassembling and re-assembling, of preferably round tubular member (1) of non-metal thermoplastic material with corresponding joint elements (2), likewise of non-metal thermoplastic material. Taking into account the specific conditions in the processing of thermoplastic materials, the conception will enable the use of the assembly according to the invention also with substantial deviations in the dimensions of the crosssections of said tubular members (1) or joint elements (2). According to the invention, each tubular member (1) is produced of non-metal thermoplastic material, either in form of ordinary pipe or even in form of a double-wall pipe. It is moreover equipped with a number of preferably triangular ribs (12) on its inner surface (11), which are running essentially in its longitudinal direction and are moreover in profile parallely separated from each other. Said tubular members (1) can be placed, preferably pressed, onto appropriate tubular protuberances (21) of suitable joint elements (2), whereby each tubular protuberance (21) is equipped with at least one notch (22) being arranged in its longitudinal direction.

Description

Furniture fittings made of thermoplastic non-metallic material made of round tubes and pipe connections

The invention relates to the field of mechanical engineering, in particular mechanical elements, and more specifically to devices for attaching or securing machine elements, and more specifically to the field of furniture ties. According to the International Patent Classification (IPC), inventions of this kind are classified in class F 16 B 12/12.

Further, according to the above classification, such an invention could generally be placed in class F 16 B 2/20, in which, however, silos-folding couplings are arranged, the operation of which is ensured on the basis of their resistance to transformation.

The invention is based on the problem of designing a simple and inexpensive furniture connection that will allow for fast, yet reliable enough, but in general also a disassemble and reproducible interconnection of, in particular, round tubes made of non-metallic thermoplastic material with appropriate tubular connections. made of non-metallic thermoplastic material, whereby, taking into account the specific conditions of processing thermoplastic materials, the design will make the connection usable even with more significant deviations in the dimensions of the respective tubes or pipe connections.

From SE 9101249 oz. EP 0510560 Al is a known so-called element for connecting two parts, generally in the connecting plane, comprising the first means for connecting the element relative to the first part and the second means for connecting the element relative to the second part. This second part comprises a locking member which, when the two parts are moved relative to each other, substantially along the connecting plane causes the silo to be interconnected with one another. Such a solution is, no doubt, fairly reliable, but unfortunately completely unsuitable for connecting a classic round pipe to a corner link; for this purpose, the tube would have to be specially adapted for this purpose, and the design itself would in any case be too complicated to meet the objective set out in the present invention. Furthermore, the successful operation of this type of preparation would be conditioned by the relatively stringent requirements for manufacturing tolerances of individual components, but such requirements cannot be substantially helped by finding a simple and inexpensive solution.

On the other hand, the applicant is aware of the manufacturer's solution for cheap furniture structures made of paper-based pipes, in fact a union of some paper rolls, and pipe ties made of non-metallic thermoplastic materials. The pipe joints are provided with protruding conical projections in suitable directions, on which relatively deformable tubes of paper material can be printed. Due to the friction between the inner surface of each tube and the outer surface of the corresponding conical projection, a satisfactory silo-coupling of the designed furniture elements is obtained. Despite its simplicity and satisfactory strength under ideal conditions, the said solution has at least two inevitable disadvantages that the user encounters during practical use. On the one hand, it is problematic to make a pipe connection made of thermoplastic material or. paper tubes in a sufficiently narrow tolerance range, so it happens in practice that the pipe attachment on the pipe connection is often more or less loose, which, when used due to different loads of furniture, further aggravates, thereby deforming the tube locally and increasing the breathability. In particular, the quality of the fit has multiple disassembly and reassembly effects. On the other hand, it happens that under certain conditions, the connection completely fails, which is usually the case, for example. in areas exposed to moisture, chemical influences or only slightly larger temperature changes.

The object of the invention is therefore a furniture connection made of thermoplastic non-metallic material made of round tubes and corners, in which each round tube is tightly fitting or. printed on the corresponding cylindrical or. the tubular projections of the tubular connection, resulting in a silo-like, but detachable and reproducible connection of the circular tube and the tubular connection. According to the invention, a non-metallic thermoplastic material is formed by a round tube which is provided with a plurality of substantially triangular ribs extending substantially parallel to each other in substantially longitudinal directions, adjustable, preferably printable, pertaining thereto the tubular projection of each tubular connection. Each tubular projection is provided with at least one notch running in its longitudinal direction. Said ribs on the inner surface of the pipe may further be trapezoidal, semicircular or rectangular in profile. Furthermore, at least one elastic, circumferentially interrupted clamp can be fitted to said tube externally, in the transverse plane and in the radial direction of the tube, each designed at least two spaced at each end, substantially radially outwardly projecting. . The end plug is further inserted into the associated tubular projection of the pipe connection with its stem. In each case, the stem of said plug is provided with at least one longitudinally extending rib, the number of ribs preferably corresponding to the number of longitudinal notches of the corresponding tubular projection of each tube. In addition, an alternative embodiment of the furniture connection is possible, in which a projection of a double-stranded tube consisting of a coaxially arranged tubular shell separated from each other in the circumferential direction of the tube by uniformly spaced ribs is mounted on said projection of the pipe connection.

The invention will now be further concretized with an embodiment, which will be described in more detail on the basis of the accompanying drawing, with FIGS. 1 is a plan view of a furniture connection made of thermoplastic non-metallic material of circular tubes and pipe connections, shown in partial longitudinal cross-section of individual areas, in the outline, FIG. 2 is a cross-sectional view of furniture in the plane Π - Π according to FIG. 1, FIG. 3 is a separate view of the furniture connection tube in the side view, and FIG. 4 shows, in Fig. 4, the pipe connection of the furniture connection according to the invention; 5 is an alternative embodiment of a furniture connection with a double-walled tube shown in cross-section in a substantially the same plane as in FIG. 2, but without clamp, and FIG. 6 is a double-sided design of an alternative embodiment of FIG. 5, in side view.

As can be seen in FIG. 1, the connection according to the invention is essentially based on a round, thermoplastic material of the pipe 1 and pipe connection 2, which in the present case is also preferably made of thermoplastic material, but the latter is not really relevant to the invention itself.

As can be seen in FIG. 2 and in particular in FIG. 3, pipe 1 is optionally made as a classic round pipe, but on its inner surface 11 is provided with ribs 12. The ribs 12 are optionally triangular in the case, but different embodiments are also possible. It is also logical to design with ribs 12 that are trapezoidal in profile. Further, the ribs 12 in the profile could also be semicircular or rectangular, or. square. It is of particular importance that the ribs 12 on the inner surface 11 - in the circumferential and / or the circumferential direction. the tubes in the direction of the tube 1 are arranged at least substantially spaced apart from each other, and further extending substantially or at least approximately in the longitudinal direction of the tube 1, either or respectively. preferably linear, but also along a curve, e.g. like a helix.

The pipe connection 2 (Figs. 1, 2 and 4) is optionally made as a single piece, consisting of, in the case in question, six identical tubular projections 21, two projections projecting in each of the respective principal spatial coordinate axes. This is merely one of the possible embodiments of the pipe connection 2, which in no way constitutes a restriction on the protection zone of the present invention. In general, pipe connection 2 could also be derived from e.g. only two projections projecting at an angle, or even tubular projections, coaxially arranged 21.

Each protrusion 21 of the tubular connection 2 is provided with at least one longitudinally extending notch 22. In each case, each protrusion 21 is provided with two diametrically opposite members of opposite longitudinal notches 22.

Furthermore, in the present case, the connection of the pipe 1 and the pipe connection 2 to the respective pipe 1 can be secured by means of clamps 3 (Figures 1 and 2), which can be e.g. glass plate, support plate, decorative plate and the like. In each case, the clamp 3 is made of an appropriately elastic, preferably thermoplastic material, and is designed as a circumferentially interrupted ring, and is further provided with at least two mutually spaced, substantially radially outwardly projecting and substantially interconnected substantially parallel ports 31, 32. In this case, too, it should be noted that there would be 31 or. 32 may also be greater, e.g. three in the case if you want to attach two parallel plates 5 to each other on tube 1.

Furthermore, in FIG. 1 is a visible end plug 4, which is shown in partial cross-section, and is formed from a stem 41 and a head 42, which is optionally semicircularly made. The stem 41 is provided with at least one longitudinal rib 43, it being noted that the number of ribs 43 preferably corresponds to the number of longitudinal notches 22 of each projection 21 in which the plug 4 is fitted.

When a tube 1 is made from a suitable thermoplastic material (eg by extrusion) and cut to a suitable length, the connection of the invention can be made by attaching the tube 1 to the corresponding projection 21 of the pipe connection 2. For loads such as normal in the case of furniture, the connection according to the invention is preferably provided by manual assembly or at the most - if necessary - by printing, but without significant load, but e.g. only by slight blows in the longitudinal direction of the pipe 1. This is achieved on the one hand, or. made possible by the design of the ribs 12 on the inner surface 11 of the pipe 1 and, on the other hand, by the design of longitudinal grooves 22 on the respective projection 21 of the pipe connection 2. Furthermore, when mounting e.g. of plates 5 on tube 1, it is possible to first place plate 5 between the corresponding mountings or. the corresponding nozzles 31, 32 of the clamp 3, and then push the clamp 3 in the lateral direction of the tube 1 or 2 without much difficulty, and in particular with minimal load. in the direction of its diametral plane, respectively. the transverse planes of panel 5. In this case, the clamp 3 is so open or extended. it unlocks, it can be inserted into tube 1 and then hugged. It is further possible for the connection according to the invention, if necessary, to provide those projections 21 of the pipe connection 2 on which the pipe 1 is not attached, or. close or. end with a closing plug 4 whose respective longitudinal rib 43 on the stem 41 enters into the corresponding notch of the respective projection 22 of the pipe connection 2, with a suitable fit, thereby preventing the plug 4 from accidentally falling out of the projecting projection 21.

The design described takes into account the specific characteristics encountered in cases where components of more or less stressed buildings are derived from thermoplastic materials. Namely, when the tube 1, by means of ribs 12 made on its inner surface 11, rests on the projection 21 of the pipe connection 2 provided with at least one longitudinal notch 22, a surprisingly simple and effective (reliable) elastic connection of said parts is obtained, which functions despite the relatively large dimensional variations that can be completely avoided in the processing of thermoplastic materials, and at the same time, despite the possible deformations that occur under normal loads such as exposed furniture, there is sufficient friction between tube 1 and circuit 2. Since the connection according to the invention is largely or generally elastic deformation of the ribs 12 and projections 21, the connection is in any case detachable and reproducible; the same applies to clamps 3 and plugs 4.

For thermoplastic materials, the processing of which could be feasible while providing relatively small dimensional variations, the alternative arrangement of the furniture joint (Figs. 5 and 6) may also be considered, in which the pipe ena is designed as a double-sided tube. In this case, the tube Γ is made of two tubular shells 15, 16 coaxially arranged in one another, with relatively thin ribs 17 arranged between them (viewed in the circumferential or circular direction of the tube 1 ′), with each other evenly spaced. In the alternative embodiment of the furniture connection, therefore, a pipe Γ of the design described above is mounted on the corresponding projection 21 of the pipe connection 2. Such a design could also, in certain cases, allow sufficient elasticity of the joint, thereby ensuring sufficient friction between the projection 21 and the tube Γ, and thus the reliability of the joint.

Finally, it should be noted that the furniture association according to the invention is especially distinguished by its resistance to moisture and other adverse climatic conditions, to which various furniture elements are exposed when outdoors (panels, advertising shelves, etc.), and often even then when installed in damp areas (eg in basements, garages, or even in less comfortable business or living spaces).

For:

KOROŠEC Bogdan

Λίκ * rami meh uimui · uibhmba. Dipl. ing. Dušan BORŠfAit, s.p 812 "DOMZALE L | uM | an" a 01. SLC

Claims (7)

1. Furniture coupling made of thermoplastic non-metallic material of round tubes and pipe connections, in which each round tube (1, Γ) is tightly fitting, respectively. printable to the associated pipe connection (2), thereby obtaining a silo-locking but detachable connection of the round pipe (1) and the pipe connection (2), characterized in that the non-metallic thermoplastic material (1) is designed to be is preferably provided on its inner surface (11) with a plurality of substantially triangular ribs (substantially triangular ribs) extending substantially parallel to it in its longitudinal direction, adjustable, preferably printable, pertaining to a tubular and externally cylindrical The protuberance (21) of each tubular connection (2), each tubular protuberance (21) having at least one notch (22) extending in its longitudinal direction. Furniture assembly according to claim 1, characterized in that the pipe (Γ) is designed as a double-walled tube consisting of coaxially arranged tubular shells (15, 16) coaxially separated from each other in the circumferential direction of the pipe (Γ) ribs evenly spaced (17). Furniture connection according to claim 1 or 2, characterized in that a flexible clamp (3) is arranged on the tube (1) from the outside, in the transverse plane and in the radial direction of the tube (1), in a circumferential direction. with at least two spacers substantially radially outwardly projecting (31,32). Furniture connection according to claims 1, 2 or 3, characterized in that a terminating plug (4) with a stem (41) is inserted into the associated tubular projection (21) of the pipe connection (2) with its stem (41). provided with at least one longitudinally extending rib (43), wherein the number of ribs (43) preferably corresponds to the number of longitudinal notches (22) of the corresponding tubular projection (21) of each tube (2). Furniture assembly according to claim 1, characterized in that the ribs (12) on the inner surface (11) of the tube (1) are trapezoidal in profile. A furniture connection according to claim 1, characterized in that the ribs (12) on the inner surface (11) of the tube (1) are semicircular in profile. Furniture joint according to claim 1, characterized in that the ribs (12) on the inner surface (11) of the tube (1) are rectangular in profile. For: KOROŠEC Bogdan m asm · * mat βιικι fotmih Dipl. ing. Soul BOSSTAE, s.p. 11230 OOUCHALF 'jutlians 91. Sl.f -at ' ABSTRACT The purpose of the invention is to design a simple and inexpensive furniture connection, which will provide a fast and reliable enough, but certainly detachable and reproducible interconnection of especially round tubes (1) of non-metallic thermoplastic material with the corresponding tubular connections (2), as well as of non-metallic thermoplastic materials. Taking into account the specific conditions for the processing of thermoplastic materials, the usefulness of the joint should also be ensured in case of more significant deviations between the pipes (1) or the pipe connections (2). In this case, a non-metallic thermoplastic material is formed by a circular tube (1), which in the alternative embodiment of the connection according to the invention may also be double-walled, and preferably in the internal surface (11), preferably provided with a plurality in its longitudinal direction on its inner surface (11). preferably substantially triangular ribs (12) extending, preferably printable, to the corresponding tubular projection (21) of each tubular connection (2), each tubular projection (21) also being provided with at least one notch running in its longitudinal direction (22).