The invention relates to an anti-fall safeguard for persons with a supporting base, with which the anti-fall safeguard is able to be set up on an underlying surface consisting of individual concrete slabs, wherein the concrete slabs are equipped with reinforcing elements projecting upwards, and an anchoring mast system connected with the supporting base, on the free upper end of which a piece of personal protective equipment (PPE) is attached.
An anti-fall safeguard with supporting base is known, for example, from DE 20 2016 007 169.7 U1. As is perceived from this utility model patent text, such generic anti-fall safeguards are generally utilized where collective safeguards like a lateral safeguard seem inapplicable, or catcher devices such as safety nets appear to be inappropriate. The subject of this utility model is based on safeguards that are crane-like in configuration and equipped with a mast system and an outrigger. In such safeguards, on the outer, upper end of the outrigger, so-called personal safeguards (PPE) are situated.
With a catcher device in the form of a PPE, a cable safeguard is wound up on a kind of drum, which can be made to link with a person with a kind of hook. In the event of a fall or with a jerking load of the cable safeguard, the drum is blocked so that the cable safeguard cannot be further unwound from the drum. If the cable safeguard is again relieved of its load, then the drum is again released so that the person to be safeguarded can again freely move. The main area of application of such systems is principally found in so-called formwork structures for floor formwork. From such floor formworks, “shuttering boards” are laid on support structures, so that altogether these shuttering boards form a kind of “underlying surface,” on which a concrete cover can be cast at a later time. Such concrete covers have iron interior reinforcements, so that, depending on the size of the concrete base to be produced, the shuttering boards are braced over a large area, to also be able to apply additional shuttering boards, arranged in distributed fashion over a wide area.
The above-named utility model shows that one of the most frequently used methods is based on attaching the PPE on an outrigger crane with a supporting base and a kind of anchor mast system, to guide the cable safeguard from above to the person to be safeguarded. This method has been shown to be very effective.
What is disadvantageous in this system is that, to ensure stability, core cases or plates need to be included in the planning of the project. Additionally, these components represent a considerable cost component. Since these components can no longer be removed from the supporting structure of the edifice (an already cemented concrete cover), designers specializing in the early phases of structural design regard them with skepticism.
Based on such systems in the form of a “simple crane,” according to the above-named utility model patent, an anti-fall safeguard with support base and an anchoring mast system of the particular type was produced.
This special anchor mast system with its two mast elements that “bend” when loaded, has proven to be very advantageous. True, it has been shown that with particular base structures, the support base can “slip” laterally. In this regard, the support base, due to its standing structure directed toward the base, cannot be set up on certain underlying surfaces with any security.
Thus, of late, instead of the above-mentioned shuttering boards, already prefabricated concrete elements with a width of about 6-8 cm are used, which can be placed next to each other over a wide surface. The especial advantage of this is that the underside bracing can have a considerably larger surface, since the number of these concrete slabs to cover the same concrete surface to be cast, is considerably smaller than the individual, substantially smaller shuttering boards.
Such concrete parts and concrete slabs are characterized in that they are equipped at least in part with reinforcing steels. These reinforcing steel parts project out over the upper side of these concrete slabs by a few centimeters, so that the upper side of these concrete slabs does not form a uniform footprint. In addition, the friction coefficient on these iron reinforcement components projecting upwards is very slight, so that the anti-fall safeguard with its support base always tends to shift if there are greater lateral loadings.
Accordingly, the goal of the inventive task is to so configure an anti-fall safeguard at small expense with supporting base in such a way that a lateral shifting or slippage of the entire anchor mast system is prevented.
The goal is achieved, together with the features recited above, in that two or more cable safeguards are provided, which are able to be connected with the reinforcing elements of the concrete slabs, and that the cable safeguards are tensible, and that the support base, through tensioning of the cable safeguard, is immovably secured on the underlying surface.
Owing to the invention-specific configuration, an anti-fall safeguard with supporting base is made available in which the supporting base, together with the attached anchor mast system, cannot shift on a “floor formwork” consisting of a prefabricated concrete slab.
For this, according to the invention, two or more cable safeguards are provided, which are able to be brought in connection with the reinforcing elements of the concrete slabs. Also, these cable safeguards are additionally tensible, so that the support base, through tensioning of the cable safeguard, is immovably secured on the underlying surface. In this connection, the cable safeguards can be an integral component of the supporting base. However, since this means a structural expenditure of a special type for the supporting base per se, such cable safeguards can also be configured by other means.
First, provision can be made that the cable safeguards be equipped with cable winches for tensioning, which are in direct or indirect connection with the supporting base via upright columns protruding upwards. By this configuration, in particular it is extremely easy to place tension on the cable safeguard, also with the tensioning direction able to be adjusted in an extremely simple way due to simple suspension and possible automatic alignment of the cable winch.
In addition, provision can be made that the cable safeguards with the cable winches and the upright columns are part of a separate plate, on which the supporting base of the anti-fall safeguard can be set up in fixed fashion.
Especially owing to this configuration, the cable safeguard is usable in variable fashion for the entire anchor mast system and the entire anti-fall safeguard. If the underlying surface permits that the anti-fall safeguard with its supporting base is able to be set up on its own without danger of a “slippage,” as is the case, for example, on simple shuttering boards, then a cable safeguard is not necessary. Correspondingly, the anti-fall safeguard in such an instance can be employed without additional precautions.
However, if an underlying surface is provided, like the concrete slabs described in the outset, with their iron reinforcing components projecting upwards, which adhere only extremely lightly to the supporting base, then between the supporting base and these reinforcing components of the concrete slabs, an additional plate can be provided, which is provided with the cable safeguards and the cable winches and with the pertinent upright columns. Thus, due to the additional or separate plate, each anti-fall safeguard can as required be set up in a manner that does not allow shifting.
In addition, provision can be made that the plate consist of multiple annular ring elements, and that the ring elements be round or polygonal, and that the ring elements be connected with each other in fixed fashion via radially running connection braces. These ring elements can also consist, in the circumferential direction, of separate steel components or steel plates, which together form these annular ring segments. Providing these ring segments can especially reduce weight, with the plate at the same time having large-area carrying capacity. In the process, correspondingly as per, the ring segments are at a radial distance from each other, and with their surface sections directed downward, form the footprint for the downward-directed supporting base for the anti-fall safeguard placed on the upper side.
Aided by the figures, the invention is explained in greater detail in what follows.
Here, to the full extent, reference will be made to the anti-fall safeguard as per the above-named utility model.
Further seen from
With the embodiment version depicted, upright columns 5, 6 and 7, 8 can be connected in fixed fashion with base plate 10 in the proper depicted position in the edge area of the two recesses 3 and 4, and not arranged in forcibly fixed fashion on support base 1. However, here both versions are conceivable.
If upright columns 5, 6 and 7, 8 are directly connected with support base 1, then support base 1 is able to be used together with upright columns 5, 6 and 7, 8 without additional base plate 10.
Additionally evident from
As is depicted in
For this,
To mutually stabilize ring segments 30 and 31, and central circular disk 32, these are connected with each other via multiple radial connection braces 35 and 36. The entire structure of the base plate can be configured as a welded structure. Especially a greater stability of all of base plate 10 is achieved.
The individual ring segments 30, 31 in turn can themselves be formed from segments arranged in differing circumferential sections, which are not designated in greater detail in the figure. As mentioned at the outset, base plate 10 has a function on its upper side of admitting support base 1, and via the cable safeguards of its upright pillars 5, 6, 7 and 8 and of their corresponding cable winches 15, 16, 17 and 18 for immovable fixing of support base 1 on a concrete slab 40, as can be perceived as an example from
It is perceptible that concrete slab 40, whose thickness is about 6-8 cm, is equipped with iron reinforcement elements 41, which project vertically upward toward the upper side 42 to base plate 10. At the same time, these iron reinforcement elements 41 form the footprint elements for base plate 10 and thus indirectly also for support base 1, which, as is depicted in
To attain a fixed hold of base plate 10 together with support base 1 on iron reinforcement elements 41 projecting upwards, cable winches 15, 16, 17 and 18 are provided with their corresponding manual cranks 19, 20, 21 and 22.
For this,
Thus, by tensioning the cables in accordance with the cable safeguards 50, 51, 52 and 53 shown as examples in
Since in normal operation, support base 1 is equipped with an anchor mast system, certainly an anti-fall safeguard is ensured for persons, since especially the anchor mast system together with support base 1 is immovably secured on concrete slab 40 and its iron reinforcement elements 41.
Number | Date | Country | Kind |
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102017008481 | Sep 2017 | DE | national |
Filing Document | Filing Date | Country | Kind |
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PCT/EP2018/000428 | 9/7/2018 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2019/048078 | 3/14/2019 | WO | A |
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Number | Date | Country | |
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20200284054 A1 | Sep 2020 | US |