DE3737171A1 - PIPE MOUNTING SYSTEM FOR EMPTY AND LIGHT TUBES - Google Patents

Abstract

In known tubular mounting systems, in which two core parts of semicircular cross-section are forced apart by a screw and pressed against the interior of half-shells at only two facing positions, the pressure faces are very small and the connection between the tubes is therefore weak. With the new mounting system, a stronger connection can be achieved simply and reliably. For this purpose, at least three core parts (7) and at least one wedge (9) which can be braced by the screw (5) against the core parts (7) and can spread the latter in several radial directions are provided. As a result of the bracing produced over the entire periphery, the wall thickness of the tubes can be reduced and the volume of the core parts with the wedges can also be less than in the known execution. The entire mounting system is therefore lighter but nevertheless more stable.

Description

The invention relates to a pipe mounting system for Empty and light pipes for the construction of exhibition stands and shops and their furnishings with shelves, tables, seating, Cupboards, advertising media, lighting systems, Coat racks, railings and the like, in which the ends two pipes can be detached by means of an expandable plug insert are connectable, the plug insert twisting from two secured in the pipes profiled on the inside, half-shells forming an outer ring between the pipe ends made of plastic and arranged in a non-rotating manner, by a screw accessible from the half-shell outer ring expandable core parts made of metal.

In such a known pipe mounting system are two provided in cross-section semicircular core parts that when spreading apart by the screw only on the opposite positions in the screw axis direction be pressed against the inside of the half-shells, so that a relatively small contact area between core parts and half-shells and thus the connection strength speed of the pipes is not sufficient, in particular because Moving the pipes across the screw is possible.  

In addition, the well-known pipe assembly system shows ver relatively large core parts and works with thick pipe wall thicknesses, which makes the pipe mounting system becomes heavy in weight.

The object of the invention is one according to the aforementioned Kind of pipe mounting system in a simple way in relation to improve the connection strength of the pipes and the pipes are stable against each other in all circumferential directions to fix.

This object is achieved by the features of Claim 1 solved, still in the sub design features listed advantageous advantageous Represent further training in task solving.

The pipe mounting system according to the invention works with three or four core parts and with one or two wedges that the core parts radial in all circumferential directions of the tubes spread outwards so that a large-area, practical on the entire pipe circumference Pipes is reached and therefore the pipes in all directions fixings held together and held together will.

Due to the bracing over the entire circumference the pipes can have smaller wall thicknesses and the Core parts with the wedges are compared to the known Execution also formed small volume what the entire pipe assembly system in its weight version makes it lighter and still very stable; these  Points represent a further solution to the problem of the invention in terms of stability and weight training.

Furthermore, the tubes and the half-shells have one Tongue and groove profiling in an advantageous, the same large circumferential angle distribution, which is an axial Adjustment of the tubes against each other in favorable Enables angular ranges and at the same time a good one Protection against rotation between half-shells and pipes results.

These profiles can be on both sides of the Aligned outer ring on the outer sides of the half-shells be arranged, depending on the degree of angle a certain Twist grid results.

There is also the possibility to view the profiles the outside of the half-shells on both sides of the outside seen in the circumferential direction of the half-shells an imaginary line offset from each other (on the left axial shell side in one circumferential direction tion and on the right axial shell side in the opposite circumferential direction), whereby a very large installation possibility in the pipe Grid rotation results.

Another object of the invention in terms of simple mechanical and electrical connection and secure Ver binding is achieved in that the insert in addition to the mechanical expansion means, also with electrical, wired connectors where due to the plug insert a mechanical and electrical Represents coupling part and an optimal mechanical and allows electrical pipe connection.

In the drawings, embodiments according to the Invention shown, which is explained in more detail below will. It shows:

Fig. 1 is a perspective exploded view of a tube assembly system with two pipe ends, two half-shells, three core limbs and a wedge,

FIG. 2 is a longitudinal section through the same system pipe mounting,

Fig. 3 shows a cross section through the same tube mounting system,

Fig. 4 shows a longitudinal section through a further embodiment of the tube assembly system with four core members and two wedges,

Fig. 5 shows a cross section through the pipe installation system according to Fig. 4,

Fig. 6 is an end view of the same tube mounting system,

FIGS. 7 and 8 is an internal view and a plan view of a core member,

Fig. 9 is an end view of the four core portions, wherein three core parts dash-dotted lines are shown,

FIGS. 10 and 11 a plan view and a side view of a wedge,

Fig. 12 and 14, an internal view, a plan view and an end view of a half shell,

Figure 15 to 17 is an internal view, a plan view and an end view in section of the second half-shell.,

FIGS. 18 and 19 a side view and an end view of a pipe,

Fig. 20 is a schematic end view of two half-shells with in circumferential direction of an imaginary line drawn from both sides of the outer ring opposed angularly offset profiles,

Fig. 21 is a schematic plan view of the half-shells with both sides of the outer ring offset profiles,

Fig. 22 is a schematic longitudinal section through the half-shells with internal molded electrical connectors used, and ground terminal.

The tube mounting system for empty and light tubes ( 1 ) for the construction of exhibition stands and shops and their equipment with shelves, tables, seating, cupboards, advertising media, lighting systems, coat stands, railings and the like, has one end that connects two tubes ( 1 ) , expandable plug-in insert, which consists of two half-shells ( 3/4 ), which form an outer ring ( 2 ) and which are made of plastic and are arranged in a twist-proof manner and which are arranged in the inner profiled tubes ( 1 ) and are secured against twisting, by one from the half-shell outer ring ( 2 ) accessible screw ( 5/6 ) expandable core parts ( 7/8 ) is formed.

According to the invention, the plug insert has three or four core parts ( 7/8 ) and at least one wedge ( 9/10 ) that can be tensioned by means of the screw ( 5/6 ) relative to the core parts ( 7/8 ) and that can be expanded radially in several directions.

According to the embodiment according to FIGS. 1 to 3, three core parts ( 7 ) of equal size, forming a circumferentially closed hollow core and having a cross-sectional shape are provided, and the expansion of these three core parts ( 7 ) results in a wedge ( 9 ) with a trapezoidal cross-section, the wedge ( 9 ) with its wedge surfaces ( 9 a ) against the flat segment surfaces ( 7 a ) of two core parts ( 7 ) and the screw ( 5 ) screwed into the wedge ( 9 ), preferably a polygonal screw, with its screw head ( 5 a ) against the flat segment surface ( 7 a ) of the third core part ( 7 ) acts.

In the embodiment of FIGS. 4 to 11, four equal size, a circumferentially closed hollow core forming a quarter-circular cross-section having core parts (8) and two are provided by a common screw (6) mutually movable wedges (10). The two wedges ( 10 ) are of identical design and have a rhombic basic shape which tapers uniformly in the axial direction of the threaded bore ( 11 ) receiving the screw ( 6 ) to a wedge end.

In each case in the abutment ( 12 ) of two adjacent core parts ( 8 ), in the basic form diamond-shaped clamping surfaces ( 13 ) are provided for one wedge ( 10 ) each; on a longitudinal edge of each core part ( 8 ) a prism-shaped cutout ( 14 ) is provided in the center and the other longitudinal edge of each core part ( 8 ) has a flat contact surface ( 15 ), with two adjacent recesses ( 14 ) of the core parts ( 8 ) having the diamond-shaped Clamping surfaces ( 13 ) for a wedge ( 10 ) result and these clamping surfaces ( 13 ) for both wedges ( 10 ) lie opposite one another in a cross-sectional plane.

The screw ( 6 ) is formed by a left-hand and right-hand thread for the two wedges ( 10 ) having threaded bolts with an internal polygon ( 6 a ).

Each core part ( 7/8 ) has on its arc-shaped outer side a protruding outer part ring ( 16 ) engaging in the outer ring ( 2 ) of the half-shells ( 3/4 ), each of which has a rib ( 18 ) in the outer ring with at least one groove ( 17 ) ( 2 ) of the half-shells ( 3/4 ) overlaps. Furthermore, each core part ( 7/8 ) on its arc-shaped outer side at least one, preferably two, on both sides of the outer part ring ( 16 ) lying projections ( 19 ) and each half-shell ( 3/4 ) shows jacket-side savings ( 20 ), so that the on the core parts ( 7/8 ) molded projections ( 19 ) can reach through the recesses ( 20 ) of the half-shells ( 3/4 ) and come inside with the pipes ( 1 ) in the spreading effect in the clamping system.

As shown in FIGS. 1 to 3, the half-shells ( 3 ) can have inward-projecting edge edges ( 21 ) at their length ends, which overlap the length ends of the core parts ( 7 ) and fix them in the longitudinal direction.

According to the further embodiment according to FIGS. 4 to 16, a circular disk ( 22 ) is formed on each of the two ends of a half-shell ( 4 ), which overlaps the second half-shell ( 4 ) which is open at its ends and thus both half-shells ( 4 ) have a cylinder with an end wall. In this case, it is preferred to have a recess ( 23 ) in the disk ( 22 ) for carrying out any electrical lines or the like. the electrical lines or the like can also be passed through when the half-shells ( 3 ) are without disks.

In the outer part ring ( 2 ) of each half-shell ( 3/4 ) is a through-hole ( 24 ) and in a core part ( 7 ) of the three-piece insert or in an extension of the clamping surface savings ( 14 ) of the core parts ( 8 ) of the four-piece insert a push-through hole ( 25 ) for a tool, preferably a polygonal key, is provided for turning the screw ( 5/6 ).

The tubes ( 1 ) on the inside and the half-shells ( 3/4 ) on the outside have a tongue and groove profile in a certain angular circumferential distribution α between the groove ( 26 ) and the adjacent tongue ( 27 ), whereby a rotationally fixed connection between the tubes ( 1 ) and the half-shells ( 3/4 ) is reached and on the other hand an angular degree adjustment of the tubes ( 1 ) against each other in the circumferential direction is gradually ensured. This is particularly advantageous if curved pipes or cross or T pipes are used, so that the outgoing pipe parts can be adjusted in angle with respect to the straight pipe.

In the area of the springs ( 27 ) of the tubes ( 1 ), mounting grooves ( 28 ) with undercut, preferably T-shaped or dovetail-shaped cross-section, which are exposed from the outside by punching or the like, are formed on the inside.

On the abutting edges of the half-shells ( 3/4 ), projections ( 29 ) and holes ( 30 ) for fixing the half-shells against each other are formed and molded.

For the connection of two pipes with the three-way plug insert of FIG. 1 to 3 of the wedge (9) is placed between the three core portions (7) such that its screw head (5 a) with the through-holes (24, 25) comes in coverage. Then the two half-shells ( 3 ) are placed around this triple core and then inserted into the ends of the pipes ( 1 ) to be connected.

By turning the screw ( 5 ) using the key, the wedge ( 9 ) is pressed against two core parts ( 7 ) and the head ( 5 a ) acts on the third core part ( 7 ), causing all three core parts ( 7 ) to radially uniformly be spread outside and thus act on the entire circumference against the half-shells ( 3 ) and press them firmly against the inner surface of the tubes ( 1 ).

According to the pipe connection with the four-way plug insert, the two wedges ( 10 ) connected by the screw ( 6 ) are inserted into the opposite recesses ( 14 ) of the core parts ( 8 ) and then around these core parts ( 8 ) also the two half shells ( 4 ) placed and inserted into the two ends of the tubes ( 1 ).

By turning the screw ( 6 ) by means of the key, the wedges ( 10 ) are moved radially apart and their wedge surfaces ( 10 a ) press against the clamping surfaces ( 13 ) and spread all four core parts ( 8 ) radially outwards, again with a circumferential clamping action the half-shells ( 4 ) take place, which are then pressed against the inside of the tubes ( 1 ) over the entire circumference.

The wedges ( 6 ) taper with their diamond-shaped clamping surfaces ( 10 a ) in opposite directions to the outside.

The outer ring ( 2 ) of the half-shells ( 3/4 ) lies between the ends of the tubes ( 1 ) as a stop and runs with its peripheral surface flush with the outer tube surface.

The recess ( 23 ) in the half-shells ( 4 ) also continues in the core parts ( 8 ), as shown in FIGS. 5 and 6, so that a passage of lines or the like past the wedges ( 10 ) is possible.

For reasons of stability for the contact pressure of the screw head ( 5 a ) against the third core part ( 7 ) can be placed on this core part ( 7 ), namely the clamping surface ( 7 a ), a pressure plate ( 31 ), see. Fig. 3.

The wedges ( 9/10 ) take up a portion of the length of the core parts ( 7/8 ) and extend evenly on both sides of the bisector of the core parts ( 7/8 ).

The tubes ( 1 ) consist of metal, preferably light metal. The tubes ( 1 ) can also consist of plastic.

The core parts ( 7/8 ) and wedges ( 9/10 ) are also made of metal, but can also be made of plastic.

The outside diameter of the tubes ( 1 ) can be chosen as desired for a wide variety of applications.

In Figs. 17 and 19 is the angle α of the dividing grooves (26) and springs (27) are arranged.

With an angle α of 22.5 degrees, the tubes ( 1 ) can be rotated axially relative to one another by 45 degrees each.

As can be seen from FIGS. 1, 2, 4 to 6, 13 and 16, the grooves ( 26 ) and tongues ( 27 ) on both sides of the outer ring ( 2 ) are in alignment, as a result of which the half-shells ( 3 , 4 ) one have uniform profiling on the outside.

In a further embodiment according to FIGS. 20 and 21, the profiles ( 26 , 27 ) on both axial sides of the outer ring ( 2 ) are the same and / or staggered from one another, namely from an imaginary line ( 31 ) on the one (left) shell side in the circumferential direction by the angle α + and on the other (right) shell side in the opposite circumferential direction by the angle a -. With an offset of α + = 15 degrees and α - = 15 degrees from the imaginary line ( 31 ), the tubes ( 1 ) are rotated against each other by 15 degrees, 30 degrees, 45 degrees, 60 degrees, etc.

This opposite displacement of the profiles ( 26 , 27 ) on both sides of the half shell results in a very variable mounting option.

The aligned angular division α ( Fig. 1, 17, 19) and the angular division α +, α - offset in opposite directions of rotation can be provided in the most varied angular degrees.

The three angular divisions α , α + and α - created three types of half-shells ( 3/4 ), namely the half-shell ( 3/4 ) with aligned, the half-shell ( 3/4 ) with positive and the half-shell ( 3/4 ) with negatively profiled profiles ( 26 , 27 ), which means that there is an inexpensive selection of half-shells ( 3/4 ) for tube mounting for a very variable tube locking and tube arrangement to each other.

As shown in FIG. 22, an electrical connector ( 32 ) is inserted into each of the front recesses ( 23 ), which engages with latching tongues ( 32 a ) behind the shell washers ( 22 ) showing the recesses ( 23 ) and into the recesses ( 23 ) of the core parts ( 8 ) protrudes.

The two connectors ( 32 ) are multi-pole and wired together by an electrical line ( 33 ).

Electrical connectors ( 34 ) can then be plugged into these plug-in connectors ( 32 ) for the supply, removal and implementation of current.

Thus, the plug insert formed from the two half-shells ( 3/4 ), the core parts ( 7/8 ) and the wedge (s) ( 9/10 ) and plug-in connectors ( 32 ) constitutes a mechanical and electrical coupling piece.

It is also possible to only equip the plug insert with an electrical plug connector ( 32 ), which is then connected to an electrical feed line running through the plug insert and emerging from the recess ( 23 ) on the opposite end face and to which the plug ( 34 ) can be plugged is.

In a washer ( 22 ) of a half-shell ( 4 ), an earth connection ( 35 ) is formed, which via an earth line and / or the connector ( 32 ) and the metallic contact ( 19 ) between core parts ( 7/8 ) and tube ( 1 ) forms an electrical grounding of the pipe system.

Claims (22)

1. Pipe mounting system for empty and light pipes for the construction of exhibition stands and shops and their equipment with shelves, tables, seating, cupboards, advertising medium supports, lighting systems, coat stands, railings and the like, in which the ends of two pipes can be detached by means of an expandable plug insert are connectable, wherein the plug insert is formed from two torsion-proof in the inside profiled tubes, between the tube ends forming an outer ring forming half shells made of plastic and arranged in a twist-proof, expandable core parts made of metal accessible by a screw accessible from the half-shell outer ring, characterized by at least three core parts ( 7/8 ) and at least one wedge ( 9/10 ) that can be tensioned by means of the screw ( 5/6 ) relative to the core parts ( 7/8 ) and that can be expanded radially in several directions (over the entire circumference). 2. Pipe mounting system according to claim 1, characterized in that three equally large, a circumferentially closed hollow core, segment-shaped core parts ( 7 ) and a cross-sectionally trapezoidal wedge ( 9 ) are provided, the wedge ( 9 ) with its wedge surfaces ( 9 a ) against the flat segment surfaces ( 7 a ) of two core parts ( 7 ) and the screw ( 5 ) screwed into the wedge ( 9 ), preferably an Allen screw, with its screw head ( 5 a ) against the flat segment surface ( 7 a ) of the third core part ( 7 ) acts. ( Fig. 1 to 3). 3. Pipe mounting system according to claim 1, characterized in that four equally large, a circumferentially closed hollow core, a quarter circle cross-section having core parts ( 8 ) and two by a common screw ( 6 ) against each other movable wedges ( 10 ) are provided. ( Figs. 4 to 11). 4. Pipe mounting system according to claim 3, characterized in that the two wedges ( 10 ) are of identical design and have a diamond-shaped base which tapers uniformly in the axial direction of the screw ( 6 ) to a wedge end, the wedge tapering in opposite directions run outside. 5. Pipe mounting system according to claims 3 and 4, characterized in that each in the abutment ( 12 ) of two adjacent core parts ( 8 ) in the basic form diamond-shaped clamping surfaces ( 13 ) for a wedge ( 10 ) are provided, on which the wedge ( 10 ) with its diamond-shaped wedge surfaces ( 10 a ). 6. Pipe mounting system according to claims 3 to 5, characterized in that a prism-shaped recess ( 14 ) is provided in the center on one longitudinal edge of each core part ( 8 ), and the other longitudinal edge forms a flat contact surface ( 15 ), two adjacent recesses ( 14 ) form the diamond-shaped clamping surfaces ( 13 ) for a wedge ( 10 ) and these clamping surfaces ( 13 ) for both wedges ( 10 ) lie opposite one another in one plane. 7. Pipe mounting system according to claims 3 to 6, characterized in that the screw ( 6 ) is formed by a left-hand and right-hand thread for the two wedges ( 10 ) having threaded bolts with polygonal interior ( 6 a ). 8. Pipe mounting system according to claims 1 to 7, characterized in that the trapezoidal wedge ( 9 ) or the diamond-shaped wedges ( 10 ) occupy a portion of the length of the core parts ( 7/8 ) and extend with the same length on both sides of the core part halving . 9. Pipe mounting system according to claims 1 to 8, characterized in that each core part ( 7/8 ) has a shell-side, in the outer ring ( 2 ) of the half-shells ( 3/4 ) engaging outer part ring ( 16 ), each with at least a groove ( 17 ) overlaps a rib ( 18 ) in the outer ring ( 2 ) of the half shells ( 3/4 ) in a rotationally fixed manner. 10. Pipe mounting system according to claims 1 to 9, characterized in that each core part ( 7/8 ) on its arcuate outside has at least one projection ( 19 ) and each half-shell ( 3/4 ) jacket-side recesses ( 20 ) through which Grip the projections ( 19 ) of the core parts ( 7/8 ) and come inside the clamping system with the tubes ( 1 ). 11. Pipe mounting system according to claim 10, characterized in that on both sides of the outer part rings ( 2/16 ) of the half-shells ( 3/4 ) and core parts ( 7/8 ) two or more recesses ( 20 ) or projections ( 19 ) from or are molded. 12. Pipe mounting system according to claims 1 to 11, characterized in that in the outer part ring ( 2 ) each half-shell ( 3/4 ) a push-through hole ( 24 ) and in a core part ( 7 ) of the three-piece insert or in the extension of the clamping surface recesses ( 14 ) of the core parts ( 8 ) of the four-piece insert, a push-through hole ( 25 ) for a tool, preferably as an Allen key, for actuating the screw ( 5/6 ) are provided. 13. Pipe mounting system according to claims 1 to 12, characterized in that at the two ends of a half-shell ( 4 ) a circular, the second half-shell ( 4 ) at its two ends overlapping disc ( 22 ) with recess ( 23 ) is formed. 14. Pipe mounting system according to claims 1 to 13, characterized in that the tubes ( 1 ) on the inside and the half-shells ( 3/4 ) on the outside a tongue and groove profile in a uniform degree-circumferential division ( a ) between the groove ( 26 ) and tongue ( 27 ) have ( Figs. 1, 17 and 19)
. 15. Pipe mounting system according to claim 14, characterized in that the profiles ( 26 , 27 ) on both sides of the outer ring are arranged in alignment on the half-shells ( 3/4 ) ( Fig. 1). 16. Pipe mounting system according to claim 14, characterized in that each half-shell ( 3/4 ) on the outside on both sides of the outer ring ( 2 ) in opposite circumferential directions from an imaginary line ( 31 ) from mutually offset tongue and groove profiles ( 26 , 27 ) is provided with the angular degrees ( α + and α -) ( Fig. 20, 21). 17. Pipe mounting system according to claim 14, characterized in that in the region of the springs ( 27 ) of the tubes ( 1 ) inside, from outside by punching or the like. Exposed mounting grooves ( 28 ) are formed with an undercut cross-section. 18. Pipe mounting system according to claims 1 to 17, characterized in that on the abutting edges of the half-shells ( 3/4 ) projections ( 29 ) and holes ( 30 ) for fixing half-shells against each other and molded. 19. Pipe mounting system according to claims 1 to 18, characterized in that in the plug insert ( 3/4 , 7/8 , 9/10 ) in the front half-shell recesses ( 23 ) each an electrical connector ( 32 ) is inserted, which is latched with latching tongues ( 32 a ) behind the respective half-shell washer ( 22 ), both connectors ( 32 ) being wired to one another by an electrical line ( 33 ) and being connectable to electrical plugs ( 34 ) ( FIG. 22). 20. Pipe mounting system according to claims 1 to 18, characterized in that in the plug insert ( 3/4 , 7/8 , 9/10 ) in an end half-shell recess ( 23 ) an electrical connector ( 32 ) is inserted and through behind the half-shell washer ( 22 ) engaging latching tongues ( 32 a ) and connected to an electrical feed line and can be connected to an electrical connector ( 34 ). 21. Pipe mounting system according to claims 1 to 19, characterized in that an earth connection ( 35 ) is formed in an end half shell ( 22 ) ( Fig. 13, 14, 20 and 22). 22. Pipe mounting system according to claims 1 to 21, characterized in that the plug insert ( 3/4 , 7/8 , 9/10 ) with the one or more electrical connectors ( 32 ) forms a mechanical and electrical coupling part.