ES1058902U - Union for tubular structures (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Unión for tubular structures, characterized in that it comprises: - a main body (1) having a grooved base (11) from which part an expansion male (12), of tubular configuration, intended to be housed at the end of one of the tubes (4) to be joined, and it presents at its free end longitudinal cuts (13) intended to allow its lateral expansion; said main body (1) having an internal hollow (4) that affects the expansion male (12) and the grooved base (11) and that has a certain conicity, its section being reduced from the free end of the expansion male (12) in the direction of the base; - a single clamping assembly consisting of a screw (2) intended to be mounted through a transverse hole (51) made for this purpose in an intermediate area of the other tube (5) to be joined and partially inserted into the internal recess of the tube (5). Main body, and by a nut (3) mounted on the threaded end of the screw (2) and housed without possibility of rotation in the inner hollow (14) of the main body in order to achieve by driving the single screw (2) the lateral tightening of the tube (5) against the grooved base (11) and the expansion and immobilization of the male (12) inside the other tube (4). 2. Unión according to claim 1, characterized in that the nut (3) externally has a frusto-conical configuration, tapering substantially equal to that of the inner hollow (14), in order to achieve a high contact surface and frictional force that prevents the rotation of the nut (3) inside the interior hollow (14). 3. Unión according to claim 1, characterized in that the nut (3) externally has a hexagonal configuration, its longitudinal edges being arranged in coincidence with the longitudinal cuts (13) of the expansion male (12). (Machine-translation by Google Translate, not legally binding)

Description

Union for tubular structures.

Object of the invention

The present invention relates to a joint for tubular structures, of those intended to establish the fixation of a tube in a perpendicular position with respect to an area intermediate of another tube.

Background of the invention

There are currently a plurality of unions and devices for fixing tubes forming various angles, said joints being applicable in various tubular structures, such as stands for decorative planters, shelves, sideboards, scaffolding, etc.

Some of the known unions are constituted by pieces that define a configuration substantially spherical with holes for through-mounting of the tubes and with some clamping screws that establish the fixation of said pieces on the tubes. Other similar unions they incorporate two clamps or articulated claws, destined to embrace an intermediate zone of the respective tubes and ones drive screws for clamping the clamps.

These fixings provide a fixation. suitable when the tubes to be joined intersect, that is, when the fixing them is done through an intermediate zone and the tubes are not in the same plane; however, they don't turn out effective when you want to establish a "T" union, in which the two tubes remain in the same plane.

In this type of unions it is common to resort to the welding of the tubes, which raises several drawbacks, such as: the need for welding equipment adequate, have the right knowledge to handle said equipment and the inability to disassemble the tubes later for later reuse in another structure or simply to facilitate its transport.

Description of the invention

The union for tubular structures object of the invention has simple construction characteristics and efficient for joining two tubes with a minimum of preparation, of robust and aesthetically appropriate form.

For this and according to the invention, the union It consists of a main piece that has a base ribbed for lateral support over the middle area of one of the tubes to be joined and from which an expansion male intended for enter at the end of the other tube to be joined and fixed on its interior by pressure.

For this, the expansion male has a tubular configuration, provided with longitudinal cuts in its Free end that provide you with a crenellated configuration. He inner hole of the expansion male extends into the base ribbed, going through it completely. Said inner hollow presents a certain conicity, its section being decreasing from the end  free of the male towards the corrugated base.

The grooving of the base will be complementary with the outer surface of one of the tubes to be joined in order to achieve a greater contact surface and greater rigidity of the Union.

In addition to the aforementioned main piece, this union comprises a single nut and screw tightening set, in charge of simultaneously establishing the lateral tightening of the grooved base against the lateral surface of an intermediate zone of one of the tubes and an expansion of the male introduced into the end of the other tube, establishing its fixation by pressure.

To do this, the threaded end of the screw is enter from the base area inside the hole interior of the expansion plug, to interact with the nut that it is housed in said interior hollow with the possibility of longitudinal displacement and no possibility of rotation.

The use of this union requires the previous realization of a transverse hole in the intermediate zone of one of the tubes to be joined, specifically of the tube intended for contact laterally with the grooved base of the piece principal.

The hole made in one of the tubes allow the transverse mounting of the tightening screw with the sufficient clearance to allow the threaded end of the screw, but not the head of the same.

As already mentioned, the drive of the single fixing screw causes lateral tightening of the area intermediate of the tube in which the hole has been made against the corrugated base of the main piece of the joint and, simultaneously, the expansion of the male introduced at the end of the other tube due to the performance of the nut, which advances through the screw action, against the walls of the inner hollow of the threaded male and to the taper of said inner hollow.

Preferably the nut will have a truncated conical outer surface, of substantially equal conicity to that of the inner hole of the threaded male, in order to ensure good lateral contact between both elements and prevent the nut can rotate thanks to frictional force; However, said nut could have a hexagonal configuration conventional, preventing its rotation by housing the outer edges in the longitudinal grooves of the male expansion.

Description of the figures

To complement the description that is being performing and in order to facilitate the understanding of characteristics of the invention, is attached herein descriptive a set of drawings in which, with character Illustrative and not limiting, the following has been represented:

Figure 1 shows an exploded view in union perspective for tubular structures and paths portions of the tubes to be joined.

Figure 2 shows an elevation view of the main piece sectioned longitudinally by a plane vertical.

Figure 3 shows a top plan view of the main part longitudinally sectioned by a plane horizontal.

Figure 4 shows a top plan view of the joint in use position, fixing two tubes perpendicularly.

Figure 5 shows a perspective view of the union, fixing two tubes perpendicularly.

Preferred Embodiment of the Invention

This joint for tubular structures comprises a main body (1) having a grooved base (11) of the that starts an expansion male (12), of tubular configuration, which it has longitudinal cuts at its free end (13) intended to allow lateral expansion.

The expansion male (12) has a gap interior (14) that also crosses the ribbed base. Said hollow interior (14) has a certain conicity, reducing its section from the free end towards the base (11).

The joint further comprises a tightening set composed of a screw (2) that is partially inserted into the inner hole (14) and a nut (3) mounted on the end screw thread (2) and housed in the inner recess (14) without possibility of rotation. In the exemplary embodiment shown in the figures, said nut (3) externally presents a truncated conical configuration, of increasing section towards the end free of the expansion male.

In the use position the expansion plug (12) it is introduced at the end of one of the tubes (4) to be joined, while that the ribbed base (11) rests laterally on the other tube (5) to join, in which a hole will have been previously made cross section (51) for the passage of the screw (2) towards the hole interior (14) of the main part, where it interacts with the nut (3).

When setting screw tightening (2), it press the tube (5) against the grooved base (11) of the piece principal through the head (21); simultaneously, the nut (3) advances through the interior of the inner hollow (14) causing, due to the taper of said inner hollow, the lateral expansion of the male (12) and the fixation under pressure inside the tube (4). The taper of the outer surface of the nut (3) and the hole interior (14) are substantially equal to ensure a important contact surface, and prevent the rotation of the nut inside said inner hollow, due to the force of friction.

Once the nature of the invention, as well as a preferred embodiment of the same, it is recorded for the appropriate purposes that the materials, shape, size and arrangement of the elements described may be modified, as long as this does not imply an alteration of the essential features of the invention claimed in continuation.

Claims (3)

1. Union for tubular structures, characterized in that it comprises:

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a main body (1) presenting a grooved base (11) from which a expansion male (12), tubular configuration, intended to be housed at the end of one of the tubes (4) to to join, and that presents in its free end some cuts longitudinal (13) intended to allow its expansion side; said main body (1) presenting a gap interior (14) that affects the expansion male (12) and the base corrugated (11) and presenting a certain taper, reducing its section from the free end of the male of expansion (12) towards the base;

-

a single set of Tightening consisting of a screw (2) intended to be mounted through a transverse hole (51) made for this purpose in an intermediate zone of the other tube (5) to be joined and introduced partially in the inner hollow of the main body, and by a nut (3) mounted on the threaded end of the screw (2) and housed without the possibility of turning in the inner hollow (14) of the main body in order to achieve by actuating the single screw (2) the side tightening of the tube (5) against the base fluted (11) and the expansion and immobilization of the male (12) in the inside of the other tube (4).

2. Union, according to claim 1, characterized in that the nut (3) externally has a truncated conical configuration, of conicity substantially equal to that of the inner hollow (14), in order to achieve a high contact surface and frictional force that prevents the rotation of the nut (3) inside the inner hollow (14). 3. Union, according to claim 1, characterized in that the nut (3) externally has a hexagonal configuration, its longitudinal edges being arranged in coincidence with the longitudinal cuts (13) of the expansion male (12).