FI67613C - FAESTORGAN FOER ETT DUBBELROER - Google Patents

Description

6761 3

FIELD OF THE INVENTION the fastening is done by means of fastening strips and a sliding strip on the outer edge of the sleeve.

Such a mounting strip is already known. In the accompanying drawings, Figures 7 and 8 show a known fastening member 5 ". It has a female connecting member 10" by means of which it is fastened to the outer tube 2 of the double tube 2. The fastening member 5 "has a fastening strip 6" on the outer edge. The two double pipes can be connected to each other at the ends by means of this mounting strip 6 "and the corresponding mounting strip 1 in the second double pipe, not shown, and by a push strip 7. Outside the connecting member 10" there is a groove 13 "formed by bending the plate. between the outer tube, a cover plate 8 "to hold the thermal insulation between the tubes in place. The cover plate 8 "is fixed to the inner tube and likewise to the outer tube by a flange 14 and screws 15.

Due to the connection between the fastener and the cover plate, which is difficult to seal, there are considerable thermal, fire safety and sound insulation problems in the known solution. The object of the invention is to eliminate or at least considerably reduce these problems. This object is achieved by a solution characterized by that which appears from the characterizing part of the claim.

The invention will be described in more detail with reference to the accompanying drawings, in which Fig. 1 shows a fastening member according to the invention in the longitudinal direction of the pipe, Fig. 2 shows a section 11-11 in Fig. 1, 6761 3 Fig. 3 shows a top view according to the invention, Fig. 4 shows a fastening member as seen in the direction of the arrow in Figure 3 * Figure 5 shows the fastening according to the invention 1imen a second embodiment, Figure 6 shows a view of the mounting member in the direction of the arrow of Figure 5.

Figure 7 shows a mounting member belonging to a top view of the prior art, Figure 8 shows the same as viewed in the direction of the arrow in Figure 7.

Reference numeral 1 denotes a double pipe comprising an outer pipe 2 and an inner pipe 3 · Between them there is a thermal insulating material 4. The fastening member according to the invention is indicated in Figs. 3 and 4 by reference numeral 5 and in Figures 5 and 6 by reference numerals 5 '. the two double pipes are attached to each other at the ends. The push rod 7 used for fastening is shown in Fig. 2. The fastener 1 has a cover plate 8 with a female inner connecting member 9 »on the inner tube side, which is intended to cooperate with the inner tube end to connect the fastening member 5, 5 'to the inner tube 3. The side edge is associated with a female outer connecting member 10 for connection to the mounting tube in the outer tube 2. Outside the inner connecting member there is a groove 11 directly associated therewith. Inside the outer connecting member 10 there are also grooves 12 and 13 directly connected to the outer connecting member. 1i-met, as shown in Figure 2 by reference numerals 16 and 17. These grooves are also necessary for fastening the fastening means 5, 5 'to the end of the double pipe by connecting members 9 and 10 ns. 1 tongs.

3 6761 3

Figure 3 shows the arrangement of the fastener in the double pipe. The cross-section of the double tube is rectangular in shape and its axes of symmetry are marked with the letters A-A and B-B. On each of the four sides, a fastening 5 is printed at the end of the double tube between the outer and inner tubes, as shown in Fig. 2. Attachment is ensured by squeezing the so-called.

With the pliers, the sides of the connecting members 9 and 10 firmly against the inner tube 3 and the outer tube 2. The verification can also be performed in the so-called pop-ni i t no 11 ä. The dimensions 5 'and 5' of the fasteners are selected in the same way at the corners of the rectangle. The end-to-end attachment of the double tube then takes place as described above.

The invention achieves even better thermal and sound insulation properties and better fire safety. In addition, lower manufacturing costs can be mentioned as an advantage due to the simple structure. It is also easier to install the fastening member in place.

Claims (1)

6761 3 Claim: A fastening member (5, 5 ') for the end-to-end fastening of a double pipe (1) made of sheet metal, such as a ventilation pipe with an outer pipe (2) and an inner pipe (3) and a heat insulator (4) therebetween. , wherein the fastening takes place by means of fastening strips (6) on the outer edge of the fastening elements (5, 5 ') and a push strip (7), characterized in that the fastening element (5, 5') is located between the inner tube (3) and the outer tube (2) a female inner connecting member (9) associated with the inner tube (3) side of the cover plate (8) for cooperating with the end of the inner tube to connect the fastener 1i (5, 5 ') to the inner tube (3), the cover plate (8) a female outer connecting member (10) associated with the edge of the outer tube (2), known per se, for cooperating with the end of the outer tube to connect the fastening member (5, 5 ') to the outer tube (2), the outer connecting member (9) side and directly associated groove (11), inside the outer connecting member (10) directly associated groove (12), outside the outer connecting member (10) directly associated with it a known groove (13), in the groove (13) outside the outer connecting member (10) ) is a mounting strip (6) known per se.