EP0379885B1 - Telescopic guiding rails for an inclined or scaffolding lift - Google Patents

Abstract

The invention relates to telescoping guiding rails for an inclined or scaffolding lift which have a single leg and a double leg connected by means of an intermediate web to form a box section. The essence of the invention lies in the special configuration of the double leg or the box section formed from this for achieving optimum bending resistance and torsional strength with at the same time an advantageous means of connection to the bars of the inclined lift. <IMAGE>

Description

The invention relates to telescopic guide rails for inclined or scaffold lifts, preferably made of an Al Zn Mg alloy, with extruded profile legs that are perpendicular to the profile web as a U-leg, one profile leg as a single leg and the other profile leg as an inner and an outer leg having double leg is formed and a wear bead is arranged both in the vicinity of the single leg and in the vicinity of the double leg on the profile web.

Telescopic guide rails of the aforementioned type are known from German patent 35 41 836. The guide rails after the hour d. T. have proven themselves very well in practice. They are suitable for inclined lifts up to an extension length of approx. 40 m, whereby a load capacity of approx. 200 kg can be assumed for the sled guided on the inclined lift.

The demands now go towards developing inclined elevators with even longer extension lengths and in particular greater load capacities (up to approx. 600 kg) of the load handler. The previously known and proven profiles are not sufficient for this, because already when telescoping the inclined elevators - for example in the known profile after the generic hour. T. - With extension lengths over 40 m there is a risk of buckling due to the effects of wind before contacting the roof or the like.

There has also become known an embodiment of guide rails for inclined elevators in which the inclined elevators do not, as in the generic hour. T. defined, are brought together by means of wear beads, but in which the task is to be solved to give the individual side rails a higher stability than previously customary (DE-GM 84 04 549). This is essentially to be solved in that a reinforcing element is provided on the lower leg of the side rail formed integrally with the web, which reinforcement element can be formed in one embodiment of the invention as a hollow body formed from the lower leg and the web of the side rail.

Such a profile must be pulled over a mandrel and is therefore more expensive to manufacture than the profile after the generic hour. T .; However, the desired goal of increasing stability can justify this effort in view of the demand for larger extension lengths and greater resilience. It was perceived as a disadvantage in the known profile that the forces of the respective inner profile are deposited on the web, which connects the inner flange and the outer flange of the double flange - that is, they are not introduced into this web in the region of the outer web of the U-profile . The individual hollow bodies also have a relatively high web height with a relatively small width, which on the one hand leads to high-construction guide rails and on the other hand adversely affects the transverse stability and thus the torsional rigidity. In fact, the individual guide rails - in the case of an elevator which is extended obliquely - are not endangered against kinking downwards, but rather as a result of lateral loading due to twisting and thus against lateral kinking.

The object of the invention is the guide rail after the hour d. To improve T. in such a way that a greater bending stiffness and torsional strength is guaranteed with perfect guidance of the rails together. At the same time, it must be taken into account that the guide rails are given a profile which leads to optimal moments of resistance with optimal material utilization.

The invention solves the stated problem by the teaching according to claim 1.

About the hour of T. according to DE-GM 84 04 549 are in the teaching of the invention in addition to the well-known wear beads for defined guidance of the profile webs to each other, the free ends of the inner leg and the outer leg so formed that they form flanges project the intermediate bridge. This results in a very favorable welded connection with the rungs, i.e. the box profile is fully included in the forces transmitted by the rungs. This applies in particular because the inner leg and the outer leg are arranged at right angles to the web and are of the same length.

In order to achieve the best possible values with regard to the 1 section modulus for the bending stiffness, the outer leg is made thicker than the inner leg. The material thicknesses of the legs preferably behave as 7: 4. Of particular importance is the feature that the clear width of the cavity enclosed by the inner leg, the outer leg, the intermediate web and the partial section of the web is greater than its clear height. This feature greatly increases the torsional strength of the profile, because when viewed relative to the central longitudinal axis of the telescopic section, there are very favorable static values.

Advantageous embodiments of the invention are characterized by the subclaims.

The feature according to claim 2 favors welding due to the same material thickness Cross rungs of the guide rail and thus ensures perfect power transmission.

As also clarified in claim 3, the deliberately uneven thickness formation of the outer leg and the inner leg is compensated for by equalizing the thickness of the flanges projecting over the intermediate web in the connection area of the cross bars.

Claim 4 characterizes the location of the wear bead. In contrast to the known training after the generic hour. T. the wear bead is arranged on the inside of the web of the U-profile; on the other hand, with respect to the box-shaped profile, it is pulled upwards, so that the cross section which is weaker than the wear bead (between the two wear beads of each profile) is kept shorter, which likewise increases the bending stiffness and torsional strength of the profile. At the same time - with reference to the hour d. T. according to the patent 35 41 836 - a "softer" transition from the wear bead to the thickness of the actual web is achieved; in particular, this transition does not take place directly in the area of the inner leg, but clearly above it.

The claims 5-8 characterize advantageous features of the combination of telescopic guide rails including the features of one of claims 1-4. The feature according to claim 6, consequently the box profiles formed in the region of the double legs in the counting from the inside to the outside with the same or approximately the same box profile height increasingly wider box section width have, the cross stability and thus the torsional strength extremely. It makes sense, as claim 7 shows, to design the clear height between the flanges projecting over the intermediate web in the same way for all guide rails in order to be able to use rungs of the same height.

According to claim 8, a profile combination is used in which the guide rails essentially have the above-described box profile in the region of the double legs, but the second inner rail has a wider, thinner single leg and a shorter, thicker single leg, and the innermost rail has a thinner single leg and the same width, partially has closed double legs to a box profile. This partially closed to a box profile double leg is designed with respect to its leg spacing of the inner and outer legs so that the lower roller of the load handling device can be guided on the top of the inner leg (DE-OS 37 15 629).

In order to achieve an optimal connection between the respective profile of a guide rail and the associated rungs, appropriate grooves are provided at the apex between the webs and the flanges of the box profiles.

Basically, as stated in claim 5, the aim is to arrange the intermediate webs of the box profiles of all guide rails at the same distance from the central longitudinal axis of the telescopic section in order to be able to use rungs of the same length.

According to a special embodiment of the invention, however, it can be advantageous in the case of lifts of great length that are subject to high loads to assign the intermediate webs of the box profiles of inner guide rails to a smaller distance from the central longitudinal axis of the inclined or scaffold elevator than the intermediate webs of outer guide rails (claim 10). These measures significantly strengthen the most vulnerable guide rails with regard to their lateral stability, whereby it is generally sufficient to design the inner three or four guide rails (for example guide rails 1-3 or guide rails 1-4) accordingly, so that, for example, for the guide rails 1 - 3 a smaller rung width applies than for the guide rails 4-7 or 4-8. For reasons of standardization, the guide rails 1-3, for example, have the same distance from one another with respect to their webs from the central longitudinal axis of the inclined elevator; the same applies, for example, to the guide rails 4 - 7 (claim 12).

Overall, the solution according to the invention realizes a profile for inclined elevators with large extension lengths and a high load-bearing capacity, in which optimal static values can be achieved in view of the required sliding properties in connection with the bending stiffness and torsional strength.

The invention is explained in more detail below using an exemplary embodiment.

Fig. 1

in perspektivischer Darstellung die erfindungsgemäße Führungsschiene

Fig. 2

eine Profilkombination der Führungsschienen 0 - 8

Fig. 3

eine weitere Profilkombination mit Führungsschienen 1 - 8

Show it:

Fig. 1

in a perspective view, the guide rail according to the invention

Fig. 2

a profile combination of the guide rails 0 - 8

Fig. 3

another profile combination with guide rails 1 - 8

1, for example, the guide rail 2 is shown in perspective. The two profiles of the guide rail 2 are connected to one another by rungs 28.

2 that all guide rails 0-8 have an upper single leg 23. The lower double leg is formed by an inner leg 9 and an outer leg 10. Both legs 9 and 10 are connected by an intermediate web 11 standing vertically on these legs, which together with the legs 9 and 10 and the section 12 of the webs 15 to 21 forms a box-shaped profile. The inner leg of the guide rails 2-7 has a material thickness of 4 mm, the outer leg of the guide rails 2-7 has a material thickness of 7 mm. Only the outer profile (guide rail 8) differs from this; here the inner leg has one Material thickness of 5 mm; the outer leg has a material thickness of 9 mm.

The situation is similar with the web 11; it has a material thickness of 4 mm with respect to the guide rails 2-7; with respect to the guide rail 8 a material thickness of 5 mm.

The flanges 22, which point from the inner web 11 in the direction of the central longitudinal axis of the guide rail, are dimensioned accordingly. these have a material thickness of 5.5 mm with respect to the guide rails 2-7; with respect to the guide rail 8, a material thickness of 7 mm. The clear dimension between the flanges 11 is, however, the same with respect to all the guide rails 2-8 to standardize the connection with the subsequent rungs 28; it is uniformly 20.5 mm.

As can be seen from the combination of profiles according to FIG. 2, the webs 15-21 of the U-profiles have wear beads in their upper and lower regions designated 24 and 24 '. These wear beads run above the inner leg 9 into the actual web, so that the transition from the inner leg 9 into the web still takes place in the region of a greater material thickness (wear bead).

D was the thickness of the flanges 22 and 1 the length of the flanges 22. It can be seen that the flange thickness d 'of the inner leg is smaller than the flange thickness d''of the outer leg. The reference symbol s is assigned to the thickness of the wear bead; H means the clear height between the flanges 22. Furthermore, it can be seen from FIG. 2 that in the profiles of the guide rails 3 - 8 the clear width B of the cavity of the box section is greater than the clear height H of this cavity.

Fig. 2 further illustrates that the guide rail 1 has a wider thinner single leg 23 and a shorter thicker single leg 26, which is provided with a recess 29 for connection to a rung. On the inside of this guide rail 1 is the guide rail 0, which has an upper single leg 23 and a lower double leg 27, which likewise consists of an inner leg and an outer leg and is formed into a hollow profile. The distance between these two legs is such that the lower roller of the load handling device can lower onto the upper side of the inner leg.

From Fig. 3 a profile combination of an inclined elevator can be seen, which can be used under difficult conditions, ie in which the torsional rigidity has been increased by special profile. On the one hand, this is achieved by dispensing with the guide rail 0; on the other hand, however, in particular that the guide rails 1 - 3 have been given a greater width with respect to the box section. The webs 11 of the guide rails 1-3 are at a smaller distance A from the central longitudinal axis 25 (FIG. 1) than the webs 11 of the guide rails 4-7. As a result, the section modulus with respect to the guide rails 1-3 is considerably increased. For optimal Connection to the rungs 28 (Fig. 2) 11 grooves 30 are provided at the apex between the flanges 22 and the webs. In the exemplary embodiment according to FIG. 3, the box profile has been dispensed with in the outer guide rail 8 because this is the outer, stationary guide rail.

Claims (12)

1. Telescoping guide rails for inclined hoists or scaffold lifts, preferably made from an alloy of aluminium, zinc and magnesium, having extruded profiled legs which stand vertically as channels on the profiled web, one profiled leg being a single leg and the other profiled leg being a double leg incorporating an inner and an outer leg, and an anti-wear reinforcement being arranged both close to the single leg and close to the double leg on the profiled web,
   characterised by the following features:

   a) the inner leg (9) and the outer leg (10) of the double leg are joined by an intermediate web (11) arranged perpendicular to the legs (9, 10);

   b) the inner leg (9) and the outer leg (10) form a closed box profile with parts of their length together with the intermediate web (11) and a sub-section (12) of the web (15 - 21) of the channel profile (2 - 7);

   c) the free ends of the inner leg (9) and of the outer leg (10) protrude beyond the intermediate web (11) to form flanges (22);

   d) the inner leg (9) and the outer leg (10) are at right angles to the web (15 - 21) and identical in length;

   e) the outer leg (10) is thicker than the inner leg (9);

   f) the width clearance (B) of the cavity enclosed by the inner leg (9), the outer leg (10), the intermediate web (11) and the sub-section (12) of the web (15 - 21) is greater than its height clearance (H);
2. Telescoping guide rails according to claim 1, characterised in that the flanges (22) of the inner leg (9) and of the outer leg (10) which protrude beyond the intermediate web (11) are of identical length (1) and of identical thickness (d).
3. Telescoping guide rails according to either of claims 1 or 2, characterised in that the thickness (d) of the flanges (22) which protrude beyond the intermediate web (11) is greater than the flange thickness (d') of the inner leg (9) and less than the flange thickness (d'') of the outer leg (10).
4. Telescoping guide rails according to any of claims 1 to 3, characterised in that the anti-wear reinforcement (24, 24') disposed close to the single leg (23) and to the double leg juts out past the inside of the web (15 - 21) of the channel profile (2 - 8) and the anti-wear reinforcement (24') disposed close to the double leg is contiguous with the inner leg (9) and has the same thickness (s) as the sub-section (12) of the web (15 - 21) of the channel profile (guide rails 2 - 8) in the region of the closed box profile.
5. Combination of telescoping guide rails according to any of claims 1 to 4, wherein each two guide rails with their legs facing one another are joined by means of rungs to make a ladder-type telescope course, characterised in that the intermediate webs (11) of the box profile of all the telescope courses (2 - 8) are the same distance from the centre longitudinal axis (25) of the telescope course (2 - 8).
6. Combination of telescoping guide rails according to any of claims 1 to 5, characterised in that the box profiles constituted in the region of the double legs - counting from the inside outwards - have increasing box profile widths but the same or roughly the same box profile height.
7. Combination of telescoping guide rails according to any of claims 1 to 6, characterised in that the height clearance (h) between the flanges (22) which project beyond the intermediate web (11) is identical for all guide rails (e.g. 2 - 7).
8. Combination of telescoping guide rails according to any of claims 1 to 7, characterised in that - counting from the outside inwards - following the last inner guide rail (2), which incorporates a single leg (23) and a double leg of box-profile construction as in Claim 1, is a guide rail (1) having one fairly broad and thin single leg (23) and one fairly short and thick single leg (26), and following this guide rail (1) is a guide rail (0) having one fairly thin single leg (23) and a double leg (27) of the same width which is partly closed to form a box profile.
9. Telescoping guide rails according to claim 1, characterised in that a recess (30) is provided at the vertex between the webs (11) and the flanges (22).
10. Combination of telescoping guide rails according to any of claims 1 to 4, wherein each two guide rails with their legs facing one another are joined by means of rungs to make a ladder-type telescope course, characterised in that the intermediate webs (11) of the box profiles of inner guide rails (e.g. 1 - 4) are a smaller distance from the centre longitudinal axis (25) of the inclined hoist or scaffold lift than the intermediate webs (11) of outer guide rails (e.g. 5 - 7).
11. Combinaison according to claim 10, characterised in that the intermediate webs (11) of the box profiles of the guide rails (1 - 3) are a smaller distance from the centre longitudinal axis (25) of the inclined hoist or scaffold lift than the guide rails (e.g. 4 - 8) following the guide rail (3).
12. Combination according to claims 10 and 11, characterised in that the distance (A) of the intermediate webs (11) of all the inner guide rails (e.g. 1 - 3), and the distance (B) of the intermediate webs (11) of the outer guide rails (e.g. 4 - 7) following same, from the centre longitudinal axis (25) of the inclined hoist or scaffold lift is identical in each case.

Images