DE3503635C1

DE3503635C1 - Connecting apparatus for dismantleable framework structures

Info

Publication number: DE3503635C1
Application number: DE19853503635
Authority: DE
Inventors: Ewald 4600 Dortmund Rüter
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-02-04
Filing date: 1985-02-04
Publication date: 1986-06-26

Abstract

A description is given of an apparatus for connecting framework structures comprising tie bars and beams running transversely thereto, the tie bars each having at one end a fixed gusset plate and, at the other end, a releasible gusset plate, these plates having cutouts. Furthermore, in each case at least one hook is arranged respectively on the upper chord and lower chord of the beams, which hooks, oriented in opposite directions with respect to one another, engage through the cutouts. Locking means are provided which clamp the beams, for which purpose there is arranged in the hooks engaging through the cutouts of the fixed gusset plates a penetration through which a wedge-shaped connecting means bracing the gusset plate against the beams can be pushed. In addition, an axially directed threaded bore is provided in the free end of the tie bar, into which bore a screw (6) engaging through the releasible, perforated gusset plate is screwed. In order to reduce the material outlay of the connecting apparatus according to the invention, the beams (7, 8) are supported by means of their upper cords (11) on a tie-bar end wall (3) and are clamped between the latter and the releasible gusset plate (6). <IMAGE>

Description

Diese Knotenverbindung umfaßt im wesentlichen einen vertikal gerichteten, quadratischen Knotenstab 1 aus einem Hohlprofil, ein am unteren Ende des Knotenstabes 1 unlösbar befestigtes Knotenblech 2, eine am oberen Ende des Knotenstabes 1 unlösbar befestigte Stirndwand 3, mit einer zum Knotenstab 1 koaxial angeordneten Gewindebohrung 4, in die eine Schraube 5 eingeschraubt ist, ein von der Schraube 5 durchgriffenes Knotenblech 6 und zwei Fachwerkträger 7 und 8. This node connection essentially comprises one vertical directed, square node rod 1 made of a hollow profile, one at the lower end of the node bar 1 permanently attached gusset plate 2, one at the upper end of the node bar 1 non-detachably attached end wall 3, with a to the node bar 1 arranged coaxially Threaded hole 4 into which a screw 5 is screwed, one of the screw 5 through gusset plate 6 and two trusses 7 and 8.

Der Kopf der Schraube 5 stützt sich auf der Oberseite des Knotenbleches 6 ab. The head of the screw 5 is supported on the top of the gusset plate 6 from.

Auf den Schaft der Schraube 5 ist eine Schraubendruckfeder 9 aufgesteckt, die sich unter Federvorspannung an der Unterseite des Knotenbleches 6 und auf der Stirnwand 3 abstützt. A helical compression spring 9 is attached to the shaft of the screw 5, which is under spring tension on the underside of the gusset plate 6 and on the Front wall 3 is supported.

Die Knotenbleche 2 und 6 sind deckungsgleich ausgebildet, haben eine achteckige Gestalt und reichen allseitig über den Knotenstab 1 hinaus. Die Knotenbleche 2 und 6 sind zur Längserstreckung des Knotenstabes 1 rechtwinklig gerichtet. In den den Knotenstab 1 seitlich überragenden Bereichen der Knotenbleche 2 und 6 sind in Richtung der Fachwerkträger 7 bzw. 8 verlaufende, schlitzartige Ausnehmungen 10 vorgesehen. The gusset plates 2 and 6 are congruent and have a octagonal shape and extend on all sides beyond the knot bar 1. The gusset plates 2 and 6 are directed at right angles to the longitudinal extension of the node bar 1. In the areas of the gusset plates 2 and 6 protruding laterally beyond the gusset bar 1 slot-like recesses running in the direction of the truss 7 and 8, respectively 10 provided.

Ferner sind an den Enden der Fachwerkträger 7 und 8, ähnlich wie bei der Vorrichtung gemäß der deutschen Patentschrift 32 22 811 sowohl am Obergurt 11 als auch am Untergurt 12 der Fachwerkträger 7 und 8 zwei einander entgegengerichtete Haken 13 angeordnet, die die Ausnehmungen 10 durchgreifen. Furthermore, at the ends of the truss 7 and 8, similar to in the device according to German patent specification 32 22 811 both on the upper belt 11 as well as on the lower chord 12 of the truss 7 and 8 are two oppositely directed Arranged hooks 13 which reach through the recesses 10.

Die Obergurte 11 der Fachwerkträger 7 und 8 haben über die Haken 13 hinausreichende Endteile 14, die, wie aus den F i g. 1 und 3 ersichtlich, sich auf der Stirnwand 3 des Knotenstabes 1 abstützen und nahe bis an die Schraube 5 heranreichen. The top chords 11 of the truss 7 and 8 have hooks 13 extending end parts 14 which, as shown in FIGS. 1 and 3 can be seen Support on the front wall 3 of the node bar 1 and close to the screw 5 reach out.

Von den mit der Stirnwand 3 korrespondierenden Stützflächen 15 der Endteile 14 streben angeformte, nach unten gerichtete Vorsprünge 16 in Form von zur Längserstreckung der Fachwerkträger 7 und 8 rechtwinklig gerichtete Leisten ab, die in diesen angepaßte, in der Stirnwand 3 angeordnete, oben offene Ausnehmungen 17 mit Spiel eingreifen. Of the support surfaces 15 corresponding to the end wall 3 End parts 14 strive molded, downwardly directed projections 16 in the form of for the longitudinal extension of the truss 7 and 8 bars directed at right angles from the recesses that are adapted to this, arranged in the end wall 3 and open at the top 17 intervene with play.

Die Flanken der Ausnehmungen 17 und der Vorsprünge 16 sind zur Längserstreckung der Fachwerkträger 7 bzw. 8 rechtwinklig gerichtet. The flanks of the recesses 17 and the projections 16 are to extend longitudinally the truss 7 or 8 directed at right angles.

Wie aus der F i g. 3 ersichtlich sind die Endteile 14 der Obergurte 11 zwischen der Stirnwand 3 und dem lösbaren Knotenblech 6 formschließend eingespannt, wobei das Knotenblech 6 sich an zu den Stützflächen 15 parallel verlaufenden Stützflächen 18 der Endteile 14 abstützt. As shown in FIG. 3 shows the end parts 14 of the upper chords 11 clamped between the end wall 3 and the releasable gusset plate 6 in a form-fitting manner, wherein the gusset plate 6 extends on support surfaces running parallel to the support surfaces 15 18 of the end parts 14 is supported.

Die Stützflächen 18 befinden sich lotrecht über den Stützflächen 15 und somit innerhalb der lotrecht nach oben in die Ebene der Stützflächen 18 projizierten Oberfläche der Stirnwand 3, die zum Knotenstab 1 dekkungsgleich ausgebildet und angeordnet sowie zur Längserstreckung des Knotenstabes 1 rechtwinklig gerichtet ist. The support surfaces 18 are perpendicular to the support surfaces 15 and thus projected vertically upwards into the plane of the support surfaces 18 within the Surface of the end wall 3, which is designed to be congruent with the node bar 1 and arranged and directed at right angles to the longitudinal extent of the node rod 1 is.

Die Schraube 5 hat eine gegenüber der Länge der Haken 13 um so viel größere Schaftlänge, daß, wie aus der Fig. 1, linke Seite, ersichtlich, bei gelockerter Schraube 5 und bei vom Knotenstab 1 abgehobenem Knotenblech 6 der Fachwerkträger 7 an den Knotenstab 1 ungehindert angehängt werden kann. Zuvor ist jedoch zunächst der Knotenstab 1 an den mit dem einen Ende bereits ortsfest gehalterten Fachwerkträger 8 angeschlossen worden, wobei die untergurtseitigen Haken 13 des Fachwerkträgers 8 die Ausnehmungen 10 des Knotenbleches 2 durchgreifen und wobei in einem Durchbruch 19 der Haken 13 ein keilförmiges Montage- element 20 eingetrieben worden ist, welches das Knotenblech 2 fest an den Fachwerkträger 8 anpreßt. Außerdem ist gleichzeitig der Vorsprung 16 des Fachwerkträgers 8 in die hinzugeordnete, in der Stirnwand 3 angeordnete Ausnehmung 17 eingehängt worden, so daß der Knotenstab 1 auch obergurtseitig formschlüssig und lagerichtig mit dem Fachwerkträger 8 verbunden ist. The screw 5 has a length as much as the hook 13 greater shaft length that, as shown in FIG. 1, left side, can be seen with a loosened Screw 5 and, with the gusset plate 6 lifted from the node bar 1, the truss 7 can be attached to the knot rod 1 unhindered. Before that, however, is first the knot rod 1 to the lattice girder which is already held in place at one end 8 have been connected, with the hooks 13 on the lower chord side of the truss 8 reach through the recesses 10 of the gusset plate 2 and wherein in an opening 19 the hook 13 is a wedge-shaped assembly element 20 has been driven, which the gusset plate 2 presses firmly against the truss 8. Besides, is at the same time the projection 16 of the truss 8 into the associated one in the end wall 3 arranged recess 17 has been hung so that the knot rod 1 also on the upper chord side is positively and correctly connected to the truss 8.

Sind dann alle Fachwerkträger 7, 8 wie vorbeschrieben am gemeinsamen Knotenstab 1 gehaltert worden, wird das Knotenblech 6 so aufgesteckt, daß die obergurtseitigen Haken 13 der Fachwerkträger 7 und 8 die ihnen zugeordneten Ausnehmungen 10 durchgreifen, wonach die Schraube 5 angezogen und dadurch die Endteile 14 der Obergurte 11 zwischen der Stirnwand 3 und dem Knotenblech 6 formschlüssig eingespannt werden.Are then all trusses 7, 8 as described above on the common Knot bar 1 has been held, the gusset plate 6 is attached so that the upper chord side Hooks 13 of the truss 7 and 8 reach through the recesses 10 assigned to them, after which the screw 5 tightened and thereby the end parts 14 of the upper chords 11 between the end wall 3 and the gusset plate 6 are positively clamped.

Danach können die keilförmigen Montageelemente 20 zur Wiederverwendung gelöst werden. Um bei möglichst kleinem Mittenabstand benachbarter Ausnehmungen 10 in den Knotenblechen 2 und 6 voneinander dennoch einen möglichst großen Zwischenraum 21 zwischen benachbarten Ausnehmungen 10 zu erreichen, sind die freien Stirnseiten 22 der Haken 13 vielflächig profiliert, und zwar derart, daß jeweils an einen mittigen Stirnseitenteil 23 sich zwei äußere Stirnseitenteile 24 und 25 anschließen, die mit den zueinander achsparallelen Flanken 26 der Haken 13 jeweils Winkel von 135° einschließen und zur Längsachse der Fachwerkträger 7, 8 symmetrisch ausgebildet sind. Zudem ist der mittlere Stirnseitenteil 23 stumpfwinklig profiliert und ebenfalls zur Längsachse des Fachwerkträgers 7, 8 symmetrisch ausgebildet. Der stumpfe Winkel mißt ca. 1650 bis 1700. Thereafter, the wedge-shaped mounting elements 20 can be reused be solved. To with the smallest possible center-to-center distance between adjacent recesses 10 in the gusset plates 2 and 6 from each other nevertheless the largest possible gap 21 between adjacent recesses 10 are the free end faces 22 of the hooks 13 profiled over a variety of surfaces, in such a way that each on a central End face part 23 are joined by two outer end face parts 24 and 25, which with the mutually axially parallel flanks 26 of the hooks 13 each angle of 135 ° include and formed symmetrically to the longitudinal axis of the truss 7, 8 are. In addition, the middle end face part 23 is profiled at an obtuse angle and likewise formed symmetrically to the longitudinal axis of the truss 7, 8. The obtuse angle measures approx. 1650 to 1700.

In den Knotenblechen 2 und 6 sind jeweils noch zwischen den Ausnehmungen 10 Bohrungen 27 zum wahlweisen Anschluß weiterer Spann- oder Stützelemente vorgesehen. In the gusset plates 2 and 6 are each still between the recesses 10 holes 27 are provided for the optional connection of further clamping or support elements.

Die Fachwerkträger 7 und 8 umfassen jeweils, wie aus der F i g. 2 ersichtlich, außer einem Obergurt 11 und einem Untergurt 12 noch einen vertikalen Fachwerkstab 28 und zwei schräg gerichtete Streben 29. The trusses 7 and 8 each comprise, as shown in FIG. 2 can be seen, apart from an upper belt 11 and a lower belt 12, a vertical one Truss rod 28 and two obliquely directed struts 29.

In den Fig.1 und 3 ist in strichpunktierten Linien dargestellt, wie der untere Teil des Knotenstabes 1 als Fußpunkt einer Säule ausgebildet sein kann. In Figures 1 and 3 it is shown in dash-dotted lines how the lower part of the node rod 1 can be designed as the base of a column.

- Leerseite -- blank page -

Claims

Claims: 1. Connection device for node rods and arranged thereon lattice girders existing, demountable half-timbered buildings, wherein the gusset bars have a fixed gusset plate at one end and a gusset plate at the other End of a detachable, for example attached to the end of a subsequent knot rod Have gusset plate in their laterally protruding areas of the node bar Have recesses, with the truss girders also on the upper and lower chords at least one hook is arranged each, which oppose the recesses the gusset plates reach through, and that locks are provided, the one Clamping the trusses between the gusset plates, including in the the recesses of the firmly connected gusset plate penetrating hook a breakthrough is arranged, through which a wedge-shaped, the gusset plate to the truss tensioning connecting means can be pushed through, in which case the firmly connected Gusset plate facing away from the end face of the node bar a disc with an axially directed threaded hole provided, the detachable gusset plate designed as a single part and perforated in the middle and one that extends through the perforated gusset plate and is with it the screw supporting its head on the outside of the gusset plate under axial pretension is screwed into the threaded hole of the disc, the connecting means on the firmly connected gusset plate serves as an assembly tool that after tightening the screw is removable, characterized in that the disc acts as an upper end wall (3) of the node rod (1) is formed in which it is on top of the node rod (1) is attached and in addition at least two upwardly open recesses (17) has, in which at the free ends of the upper chords (11) directed towards the end wall (3), engage the recesses (17) adapted projections (16).

2. Apparatus according to claim 1, characterized in that the projections (16) than at right angles to the longitudinal extension of the trusses (7, 8) Lasts are trained.

The invention relates to a connecting device for knot rods and lattice girders arranged thereon and which can be dismantled that specified in the preamble of claim 1 and from the German patent specification 32 22 811 known genus.

In the known device, the truss supports each other their lower chords on the gusset plate, which is fixedly arranged at the lower end of a node bar away. Furthermore, on the trusses to the node bar are arranged alongside and truss rods supporting the upper chord of each truss on the lower chord provided and the detachable gusset plate is supported vertically above the aforementioned Half-timbered bars on the upper chords.

In addition, in the end part facing away from the firmly connected gusset plate of the knot rod in all Long sides each one axially parallel to the front Arranged opening out slot and strives from the front sides of the truss each one inserted into the opposite slot with the head on the inside of the node state from supporting bolts, so that the truss even before the connection of the detachable gusset plate in the area of their Upper chords are held in the correct position relative to the common node bar.

This is a considerable simplification of the assembly reached, but the trusses require that the top chord is close to the knot bar supported by means of a rod arranged alongside the latter and vertically must become. In addition, the gusset plates must be relatively heavy and rigid because they transfer the load to the node bar and also high bending forces are exposed.

The object of the invention is now a connecting device of to improve the type specified in the preamble of claim 1 that in particular while maintaining the simple installation option with lower material costs than at least the same load-bearing capacity for the truss has been achievable so far, which also results in cheaper production than before.

The solution to this problem is characterized in that the disc is designed as the upper end wall of the node rod, in which it is on top of the node rod is attached and additionally has at least two upwardly open recesses, into the recesses directed towards the front wall at the free ends of the upper chords engage adapted projections.

Through these measures, the effective on the truss Loads no longer from the upper chord via the vertical truss rods onto the lower chord and from this via the lower gusset plate to the gusset bar, but now directly transferred from the top chord to the upper face of the knot rod, so that so far required, above, arranged alongside the node bar, perpendicular Truss rods of the trusses can be dispensed with.

In addition, the detachable gusset plate can now be made easier, weaker and therefore cheaper than before, because the detachable Due to the now shorter lever arms, the gusset plate is far less than before Bending is stressed. In addition, that which is firmly connected to the node rod can also be used Gusset plate can be made lighter and cheaper than before, because the lower Gusset plate now mainly only through to the longitudinal extension of the node bar transverse tensile and compressive forces are loaded.

An embodiment of the connecting device according to the invention is shown in the drawings and is described in more detail below. It shows F i g. 1 a node connection of trusses during assembly in the Front view partially broken away, FIG. 2 a schematic representation of a Front view of the truss, with the area circled that appears in 1 and 3 is shown enlarged, F i g. 3 the node connection finished mounted, Fig.4 also seen in the direction of the line IV-IV of Fig.3.