DE2623484A1 - SPINDLE STAIR - Google Patents

Description

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PATENT Attorney DIPL .-! NG. GERD UTERMANN

71 HEILBRONN, POST BOX 3525. CABLE: PATU, TEL. (07131) 82828 .MoltkestraiJe 6 (Haut dar Deutsche Bank). Parking: Harmonie underground car park

Deutsche Bank Hellbronn: 364364 Handelsbank Hellbronn: 23080 5 Kreissparkasse Hellbronn: 7001 6 Postscheck Stuttgart: 43016-704

Patent application B 9. "1-2 D-111

April 22 / April 25 May 1976 / 1K

Applicant: Mr.

Erich Zimmermann

Welschstrasse 15

7100 Heilbronn-Böckingen

Designation: spiral staircase

Description:

The invention relates to a spiral staircase.

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709549/0271

B 9.2 D 111

Various spiral staircase designs are known. Most spiral staircases have individual elements that are part of the central column as well Components of the stages included. There are continuous tread plates, between which the distance may be variable Intermediate pieces are arranged, which are clamped together with the help of a tension cord. These require the use of torque wrenches for conscientious work · In addition, there are many screwable parts expensive and the stairs are therefore only suitable for higher demands. Other spiral staircase constructions show a central continuous tube on which the steps or step retaining elements are welded. These stairs are quite difficult to transport and disadvantageous during assembly; often the shapes of the step retaining elements are very complex and technically difficult to assemble.

The invention is based on the object to create a spiral staircase, which is particularly simple in construction, inexpensive to manufacture and very light in the assembly, so that ^one also of little trained personnel or by lay people in the do-it-yourself method can be installed without endangering stability. According to the invention, a central standpipe is provided, which is divided roughly in the middle and can be firmly connected, cantilever arms made of rectangular steel tube welded to the central steel tube, step plates lying on the cantilever arms, which are shorter than the cantilever arms, at the ends of the protruding beyond the step plates Cantilevered fastened balusters, welded cross bars at a short distance from the outer edge of the steps, approximately in the circumferential direction, which extend to just before the rear edge of the tread plates.

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So it is a two-part industrially very simply prefabricated, but stable support structure for the entire staircase is provided. So there are only two per floor Parts needed. These are so light individually and, since they only form part of the circulation, also in the lateral direction Overhang not very large. They can therefore be easily transported. You only need them on the spot at the connection point be connected to each other. Then the supporting structure is attached to the building. On the finished and Now completely stable substructure are simple boards, planks, plates or the like for the expansion work. hung up. You can also install a guardrail or the final guardrail flawlessly now, because this is connected directly to the cantilever ends. When there is no longer any risk of damaging the steps these simply put on and fastened. A wide variety of materials can be used for the steps. By the simplicity of construction and assembly makes it possible to provide a very inexpensive staircase. the The profiles used are a round steel tube for the central tube, while rectangular tubes are used for the cantilever arms will. The round tube offers the possibility of fastening everywhere, depending on the number of steps and the step angle. The rectangular tube profiles for the cantilever arms have a good strength and offer good support surfaces for the step plates without reworking.

The front edges of the cantilever arms can expediently be placed on radii running through the spindle axis. You then get

/ en
staggered arrangement of the cantilever arms, which allow easy access even on small stairs, because there is just enough space available near the spindle for stepping on. The trailing edges of the

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Cantilever arms can then end with the circumferential surface of the spindle tube, They are almost tangential, but are parallel to the radii. The exact location depends of course on the size of the stairs. However, this arrangement is particularly beneficial for small stairs. The front edges of the step plates can expediently run parallel to the front edge of the cantilever arm at a small distance. So you get on the one hand an appealing picture, on the other hand you can realize cheap tread plate surfaces even with small stairs. The cantilever arms also serve to prevent the openings between the individual steps from becoming too large, see above that children cannot fall through.

The stairs can be made in different dimensions. In particular, approx. 1 ZfO to 160 cm come into consideration as the diameter * 'on which the cantilever ends lie. Especially for smaller diameters, the spindle tube diameter can expediently be approx. 8 cm. With a total diameter of approx. 1 i + 0 cm, the cantilever arms should then be approx. 6 cm high and their profile approx. K cm wide. You can thus "obtain a balanced ratio of material expenditure, stability and attractive shape. In the case of larger stairs, the cantilever arms are enlarged accordingly if necessary Such a pipe section of about 50 to 80 cm in length results in a connection that meets all requirements. The plug-in pipe section can advantageously be welded into the lower steel spindle pipe part, thus enabling the upper part to be inserted well. This can be done with radially arranged grub screws during assembly

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B 9.2 D 111

finally be screwed tight. Fastening flanges at the ends allow a good connection with the structure. In Vertical through-holes at the ends of the cantilever arm can be attached to handrails particularly easily and securely. the Step plates can be glued or screwed on. Elastic intermediate layers can dampen the impact sound. Around To keep the welding work to a minimum, you can use the outer end faces of the cantilever arms and if necessary close the crossbar with plastic plugs. A particularly simple, easy, and without a lot of specialist knowledge too The railing that is to be assembled can be "railing rods" as straight, possibly provided with lateral projections from Provide the cantilever elements towering elements, the upper ends of which are shaped to eyelets, through which as a handrail a thick rope stretches. These rods only need at the bottom of the cantilever arms, for example after pushing through yours Threaded pin to be fastened with a nut. Upper handrail connecting elements are saved. That Even when bending out individual railing sections, rope ensures that they are not bent too far because it the forces that occur are distributed particularly favorably on the rest of the balusters.

Further details, configurations, features and advantages of the invention emerge from the further claims and the following part of the description drawn up on the basis of the drawings.

An embodiment of the. The invention is described below .

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22Λ.76 / 1Κ

Show it:

1 shows a perspective view of a spiral staircase from the side;

Fig. 2 is a perspective partial view obliquely from below on three steps of the stairs according to Fig. 1 and

3 shows a section through the spindle tube with a view of a single step and cantilever arm from below.

The spiral staircase 10 has a central steel tube 11 which consists of two parts, namely the lower steel spindle tube part 11a and the upper steel spindle tube part 11b. The steel tube 11 is thus divided approximately in the middle at 12. It can be firmly connected here, namely plugged together. For this purpose, a suitable plug-in pipe section 13 of about tfi to 80 cm in length is inserted halfway into the lower steel spindle pipe part 11a and welded into it. The upper steel spindle pipe part 11b is plugged onto the protruding plug-in pipe section 13b during assembly and screwed tight with the aid of the grub screws lif after the angular alignment of the two parts with one another. At the lower end of the steel tube 12, a flange 15 with mounting holes 1 ^ is provided to attach the spiral staircase to the floor. A flange of the same type or another fastening is provided at the upper end of the steel pipe 12 for connection to the ceiling in the area of the passage opening. A further steel pipe section can also be attached here if the staircase extends over more than one floor.

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Corresponding to the number of steps and the provided helix, cantilever arms 16 protruding from one another at the same angles are welded to the central steel tube 11. They consist of hollow pike-corner steel tubes which have an external height h of, for example, 6 cm and an external width b of k cm. The front edge 17 of the cantilever arms 16 lies on the radius R drawn through the spindle axis A, while the rear edge 18 is flush with the circumferential surface 19 of the central steel spindle tube 11. If the diameter d of the steel tube II is 8 cm and the width b l ± cm, the rear edge 18 runs exactly as a tangent. These dimensions are favorable for spiral staircases with a diameter D of about 1 cm.

The cantilever arms 16 have through bores 20 in the region of their ends, in which the vertically rising balusters 21 are attached. Either the balusters and an external thread can be offset have, on which a nut 22 is screwed with the addition of a washer. Also can in the ends the balusters 21 be cut from below thread into which threaded rods are screwed, which in turn with screwed tightly to the nut. Cap nuts are expediently used for a better appearance. When the railing bars have an internal thread at the bottom, you can also screw in through screws from below.

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As can be seen in particular from FIG. 1, the cantilever arms are slightly longer than the tread plates 2 ^, the outer end faces 25 or outer edges of which run slightly within the balusters 21. The front edges 26 run parallel at a small distance a, for example 1+ cm in front of the radially lying front edges 17 of the cantilever arms 16

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to this. In the area of the outer ends 27 of the step plates 2X \ , cross bars 28 projecting to the rear are welded to the cantilever arms 16 underneath them. These are slightly lower in profile than the cantilever arms 16. Their upper edges end with the upper edges of the cantilever arms 16. They end at a small distance within the rear edges 29 of the step plates 2 * f. The outwardly facing front openings of the cantilever arms 16 and the crossbars 28 can be closed with plastic plugs 30 and 31 in a simple manner. However, they can also be left open or welded with pieces of sheet metal.

In the illustrated embodiment, solid wooden step plates Zk are provided. These have been screwed tight with the aid of screws 32 which extend through vertical bores in the cantilever arms 16 and the crossbars 28. To dampen the impact sound, it is expedient to place foam or some other elastic intermediate layer on the cantilever arms 16 and the crossbars before the step plates are screwed on. The step plates can also consist of several chipboards glued together in layers, which are veneered or covered with carpeting or consist of thin wooden boards glued together several times. It is also possible to place natural stone slabs such as marble or the like, which are optionally glued together from at least two layers for reinforcement. Many other materials can also be considered. During the expansion of the building, simple boards or planks can be placed on the cantilever arms, which will be replaced by the high-quality processed step plates after completion of the expansion work.

As can be seen in particular from FIG. 1, the handrails 21 are only in those protruding beyond the step plates 2h

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Ends of the cantilever arms 16 attached soaring. They are provided at the upper end with smooth, ös einbildenden rings 35, which for Verticals are inclined according to the slope of the stairs. A rope 36 is through the welded-on rings 35 pulled, which attached to the lower and upper end, for example provided with a knot, not shown is. It has been shown that such a rope attachment, contrary to expectations, offers sufficient stability because when gripping a rod or rope section and bending it out, the rope 36 exerts the forces very evenly Distributed over the remaining rods and leads to a large consolidation due to the coiled course. When the distances between the individual rods 21 are too large, so that, for example, small children can fall through, it is possible to provide lateral projections on one or both sides, which reduce the openings 37.

As can be seen from Fig. 1, cantilever arms 16 and 37 are welded to the upper end of the steel tube 11b zv / egg, which with a cross connection 38 are stiffened with one another. On these lies the upper cover plate 39> which is expediently flush with the floor or in the floor of the upper floor passes.

709S49 / 0271

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Claims (1)

PATENT Attorney DIPL.-ING. GERD UTERMANN 71 HEILBRONN, POST BOX 3525, CABLE: PATU, TEL. (07131) 82828 Moltkestra & e 6 (House of Deutsche Bank), parking: underground car park Harmonie Deutsche Bank Heilbronrv: 364364 Handelsbank Hellbronn: 23080 5 Kreissparkasse Hellbronn: 7001 6 Postscheck Stuttgart: 43016-704 • Patents accepted B 9. 12 D 111 April 22 / April 25 May 1976 / IK Applicant: Mr Erich Zimmermann Welschstrasse 15 7100 Heilbronn -Böckingen Description: Spindle t'r eppe Expectations: Spiral staircase characterized by a central steel tube (1D, which roughly in the middle (12) and divided is firmly connectable, welded to the central steel tube (11; 11a, 11b), cantilever arms (16) made of rectangular steel tube, step plates (2if) lying on the cantilever arms (16), which are shorter than the cantilever arms (16) on which protrude beyond the step plates (2 ^, 25) Handrail rods (21) attached to the ends of the cantilever arms (16), at a small distance from the outer edges (25) of the tread plates (24) lying approximately in the circumferential direction, welded Cross bars (28) that reach just before the rear edges (29) of the step plates (24). 709549/0271 B 9 · 2 D 111 4/22/76 / 1K 2. Spiral staircase according to claim 1, characterized in that that the front edges (17) of the cantilever arms (16) extend through the spindle axis (A) Eadien (R) lie. 3. spiral staircase according to claim 1 or 2, characterized in that the rear edges (18) the cantilever arms (16) with the spindle tube circumferential surface (19) to lock. Zf. Spiral staircase according to one or more of the claims 1 to 3 »characterized in that the tread plate front edges (26) at a small distance (a) run parallel in front of the front edge of the cantilever arm (17). 5. Spiral staircase after one or more of the rest Claims, characterized in that that the diameter (D), on which the cantilever ends lie, is about 1 ^ 0 to 160 cm. 6. spiral staircase according to one or more of the other claims, d. a characterized by that the spindle tube diameter (d) approx. 8 cm amounts to. 7. spiral staircase according to one or more of the other claims, characterized in that that the height (h) of the cantilever arms (16) is approximately 6 cm. 709 * 49/0271 B 9.2 D 111 22.4.76 / 1K - 3 - 8. spiral staircase according to one or more of the other claims, characterized in that that the profile width (b) of the cantilever arms (16) is approx. if cm. 9. Spiral staircase according to one or more of the other claims, characterized in that the plug connection (12) of the split central steel spindle tube (11; 11a, 11b) is formed with a welded plug-in tube section (13). 10. Spiral staircase according to claim 9> characterized in that that the plug-in pipe section (13) in the lower steel spindle pipe part (11a) is welded. 11. spiral staircase according to claim 9 or 10, characterized in that the upper steel spindle pipe part (11b) radially arranged grub screws (1if) for fastening on the plug-in pipe section (13b) are provided. 12. Spiral staircase after one or more of the rest Claims, characterized in that the steel spindle tube at the lower end and, if necessary, a fastening flange (I5) with bores (15a) for fastening screws at the upper end having. 13. Spiral staircase according to one or more of the other claims, characterized in that that in the ends of the cantilever arms (16) vertical through holes (20) for the balusters (21) are provided. • A 709849/0271 B 9.2 D 111
22Λ-76 / 1Κ lif. Spiral staircase after one or more of the rest Claims, characterized in that that in the cantilever arms (16) and possibly the crossbars (28) through-holes for fastening screws (32) for the step plates (2 ^) are provided. 15 · Spiral staircase after one or more of the rest Claims, characterized in that that on the cantilever arms (16) and possibly the crossbars (28) in the area of the step plates (24) elastic intermediate layers are provided. 16. Spiral staircase according to one or more of the claims 1 to 15j characterized by that the step plates (2 ^) made of solid wood exist. 17 .. spiral staircase according to one or more of the claims 1 to 15j characterized by that the step plates (2Zf) made of plywood or other wood-based materials. 18. Spiral staircase according to one or more of the claims 1 to 15> characterized by that the step plates (2 ^) made of natural stone, exist. 19 · Spiral staircase according to one or more of Claims 1 to 15, characterized in that that the step plates (2 ^ -) made of natural stone chunks containing stone exist. • / 5 709849/0271 B 9.2 D 111 22Λ-76 / 1Κ 20. Spiral staircase according to one or more of the other claims, characterized in that that the central steel spindle tube (11) and the cantilever arms (16) with a corrosion protection layer, are preferably provided with a coat of paint. 21. Spiral staircase after one or more of the rest Claims, characterized in that the outer end faces of the cantilever arms (16) and, if necessary, the cross bar (28) with plastic plugs (30> 31) are closed. 22. Spiral staircase according to one or more of the preceding claims, characterized by dadure-h, that the railing si; abe (21) as straight, possibly provided with lateral projections, from the cantilever arms (16). towering elements are formed, at the upper ends of which eyelets forming rings (35) are arranged, through which as Handrail extends a thick rope (36). 7O9 & 49/0271