DK2199496T3

DK2199496T3 - STORAGE UNIT FOR COVERING AN INSTALLATION EXCAVATION

Info

Publication number: DK2199496T3
Application number: DK09179626.8T
Authority: DK
Inventors: Hans Balzer
Original assignee: Balzer Gmbh & Co Kg
Priority date: 2008-12-18
Filing date: 2009-12-17
Publication date: 2018-06-06
Also published as: EP2199496A2; ES2671021T3; DE102008063578A1; EP2199496A3; EP2199496B1

Description

Storage unit for the covering of an installation pit Description [0001] The invention relates to a storage unit to hold a roller shutter type covering for installation pits having respective laterally arranged, mutually symmetrical guides of an approximately spiral-like extension, in which the cover, which is assembled into a link belt by a plurality of girders in the manner of a roller shutter, is mounted to be displaceable.

The arrangement of roller shutter type covers for installation pits or the like in a storage unit is familiar in itself. A storage unit of the kind mentioned above is described in EP 0 462 609 A1. A belt consisting of individual interconnected girders serves to cover the opening of an installation pit. The girder belt is mounted such that it can be rolled by means of rollers on edge rails of the installation pit and can be moved into the open and closed position with a chain drive. In the opening process, the girder belt travels into a storage unit in an end face of the installation pit and is guided there in two lateral guiding arrangements. The guiding arrangements are formed by U-shaped rails in cross section, which are welded on the inside to side plates.

[0002] DE 196 41 053 A1 discloses the use of a storage unit to hold a roller shutter type cover for installation pits with the features of the preamble of Claim 1.

[0003] Such storage units of the prior art are relatively expensive in their manufacture. In particular, the manufacturing of the corresponding guiding arrangements is expensive, and furthermore the relative positioning of the guiding arrangements with respect to the rollers is inadequate, so that friction forces occur during the movement of the roller shutter type cover which on the one hand need to be overcome by a drive and on the other hand result in relatively fast wear and tear of the storage unit, especially the guiding arrangements inside the storage unit.

[0004] The problem which the invention proposes to solve is to indicate a storage unit to hold a roller shutter type cover for installation pits that makes possible a simple and precise guiding of guide elements, such as rollers or the like. This problem is solved by a use of a storage unit according to Patent Claim 1.

[0005] An essential point of the invention is that a guiding plate is provided, which is outfitted with recesses. Hence, no additional rails need to be fabricated and welded on, which significantly lowers the material, labour, and cost expense. Furthermore, the corresponding recesses can be produced in an extremely precise and reproducible manner. Neither is it possible for any unintentional relative displacement to occur between side plates and guiding rails - such as in the prior art according to EP 0 462 609 A1 - during fabrication, assembly and/or operation of the storage unit. The occurrence of unwanted friction effects is reduced.

[0006] Preferably the guiding plates of the storage unit are each placed at a distance of 20 mm to 40 mm, in particular approximately 25 mm from the associated lateral pit wall. In this range, an especially simple and precise guidance of the guiding elements is made possible.

[0007] In a preferred embodiment, the spirally extending recesses in the guiding plates are obtained by laser cutting. In this way, the recesses can be made in extremely precise manner. In particular, no weld beads or the like are formed. Alternatively, the recesses or the guiding plate may also be made by metal diecasting.

[0008] Preferably, the approximately spirally extending recesses in the guiding plates are formed to pass through, so that possible variations in regard to the position of the guiding plate relative to the lateral pit wall will not result in any unwanted friction.

[0009] Alternatively, the approximately spirally extending recesses may also be formed not to pass through, or U-shaped.

[0010] Preferably, the storage unit is formed as an assembly unit. In this way, the storage unit can be made very compact and the assembly expense when constructing the installation pit is reduced.

[0011] In a preferred embodiment, the storage unit extends predominantly in the vertical direction, wherein the ratio between vertical extension and horizontal extension preferably is in a range of 1.3 to 3.0, in particular of 1.7 to 2.5, for example of about 1.9. In this way, the space occupied by the storage unit in the horizontal direction is reduced.

[0012] Preferably, a driving axle having at least one associated driving wheel is located in an entry and exit area of the girder belt above the approximately spirally extending guides. Such a provision likewise contributes to a small horizontal extension and a compact design of the storage unit.

[0013] Preferably, the storage unit can be used for a roller shutter type cover, wherein the roller shutter type cover comprises a plurality of girders forming a cover assembled into a girder belt together with at least one connecting means, in particular a conveyor chain, which cover is supported to be displaceable in guides by means of guide rollers allocated to the girders, wherein the guide rollers and/or the connecting means are at least in part received within recesses of the associated girders or the front-side areas thereof, whereby the overall constructional height resulting from the respective girders and associated guide rollers as well as the connecting means is kept low, wherein on both front sides of the girders, girder extensions are in each case arranged which are formed by angled profiles and in which the recesses are formed, wherein one leg of the angled profiles represents a flush extension of the girder surface, and another leg of the angled profiles is connected, in particular welded, to the girder.

[0014] Preferably, the girders are interconnected by two bush conveyor chains extending in parallel to the guides, wherein each girder forms a link of the bush conveyor chain, the articulations of which are each allocated to gaps between the girders, and wherein the individual links of an articulated chain are arranged in the recesses of the girders, in particular on the bottom side thereof.

[0015] Furthermore, the guide rollers may be supported axially outside the individual articulations on bolts which interconnect the individual links of the bush conveyor chain and define the articulation axes.

[0016] Since recesses in the girder significantly weaken it, girder extensions are advantageous, because then an especially resilient material can be used at the places where the recesses are provided. This effectively prevents a weakening of the girder in this place. Thus, an adequate stability of the overall cover is assured. Angled profiles have proven to be an advantageous girder extension, one leg being provided as a flush extension of the particular associated girder surface and the other leg being connected respectively to an associated end face of a corresponding girder. A weld is an especially suitable connection. Alternatively, other connections are also possible.

[0017] The guide rollers and/or connecting means may be fastened on the bottom side of the horizontal leg of the angled profile. The fastening may be done by screwing, welding, or some other way.

[0018] Further embodiments will appear in the dependent claims.

[0019] In the following, the invention will also be described with regard to further features and advantages by means of sample embodiments, which are explained more closely with the aid of the figures. There are shown:

Fig. 1, a storage unit in oblique view according to the use per the invention;

Fig. 2, a schematic longitudinal section of a storage unit according to the use per the invention; and

Fig. 3, a cutout from a schematic transverse section of the storage unit per Fig. 2 along the sectioning line II-II.

[0020] In the following description, the same reference numbers will be used for the same and equivalent parts.

[0021] An elongated installation pit (not shown in the figures) has an edge rail near each one of the upper longitudinal edges. On these two edge rails there is supported a girder belt 10 (visible in Fig. 2). The girder belt 10 consists of a plurality of girders 11 in the form of box profiles, which are joined together at the bottom end by two bush conveyor chains 12. Alternatively, other connecting means may also be used instead of the bush conveyor chain. The chain joints are associated with the abutment sites between every two adjacent girders 11.

[0022] A storage unit per Fig. 1 may be produced as a preassembled cassette of steel profiles and steel plate. This cassette may be installed from above at one end of the installation pit, without requiring any particular structural changes. The cassette serves as a storage unit for the roller shutter type cover or the girder belt 11. The cassette comprises two side walls 13 (see Fig. 1) made preferably of relatively stiff steel plates, which are held at a spacing by cross braces 14 and firmly joined together.

[0023] At a spacing from the respective side wall 13 there is arranged a respective guiding plate 15 (see Fig. 3). The spacing from the side wall 13 to the guiding plate 15 may be around 20 mm to 40 mm, especially around 25 mm.

[0024] In the respective guiding plates 15 there are provided recesses 16, which pass through in the following case, i.e., they extend through the plates 15 along their wall thickness. Alternatively, however, it is also conceivable to provide the recesses 16 as indentations within the guiding plate 15, which are not formed to pass through.

[0025] In the present case, the approximately spirally extending recesses 16 are made by laser cutting. Alternatively, it would also be conceivable to make the spirally extending recesses for example in a metal diecasting method or other method customarily used for metal processing.

[0026] The approximately spirally extending recesses 16 may also alternatively have a U-shaped transverse section (in departure from the embodiments shown in the figures).

[0027] At their inner ends, the spirally extending recesses 16 may have an end stop each time, so that guide rollers 17 held and able to roll in the spirally extending recesses 16 (see Fig. 3) cannot exit at this inner end from the recesses 16.

[0028] At the other end, the recesses 16 may pass flush and smoothly into edge rails (not shown in the figures) of the installation pit, so that the roller shutter type cover or the girder belt 10, which can be displaced through an opening of the installation pit, can be displaced into the storage unit or out from it through the opening of the installation pit.

[0029] The girder belt 10 is held displaceably in or through the spirally extending recesses 16.

[0030] At both end faces of each girder 11 there are formed rectangular recesses 18, so that the girder 11 on the whole has a T-shaped structure (in transverse section per Fig. 3, where only a part of the “T-section” can be seen).

[0031] By lining up the individual rectangular recesses 18 in adjacent girders 11, grooves are defined extending in the side regions of the girder belt 10 in the longitudinal direction.

[0032] The two bush conveyor chains 12 which likewise extend in the longitudinal direction of the installation pit run in these grooves - at the bottom side of the roller shutter type cover. Each girder 11 is associated respectively with a chain link 20 of a bush conveyor chain 12 running at the two end regions. Between every two consecutive chain links 20 of the bush conveyor chain 12 there is provided an articulation 21 (see Fig. 2), being associated each time with a gap between the girders 11.

[0033] The individual chain links 20 of the bush conveyor chain 12 are joined together by means of bolts 22 (see Fig. 3). The guide rollers 17 which roll off into the spirally extending recesses 16 are mounted on these bolts 22 in the axial direction outside the chain links 20, toward the installation pit edge.

[0034] Each chain link 20 of the bush conveyor chain 12 is fastened at the respective rectangular recess 18, for example by means of a screw.

[0035] The girder belt 10 consisting of the individual girders 11 may be moved automatically or manually into and out from the storage unit. For the automatic movement, two drive wheels 24 in the manner of a gear wheel are provided arranged on a drive shaft 23 (see Fig. 1). The drive shaft 23 as well as the corresponding drive wheels 24 are arranged above the guiding plates 15 with the spirally extending recesses 16. In this way, the longitudinal extension of the installation pit can be reduced. Alternatively, it is also conceivable (in departure from the exemplary embodiment of the figures) to arrange the drive shaft 23 and the drive wheels 24 in the entry and exit area of the storage unit beneath the girder belt 10, in front of the guiding plate 15 with the spirally extending recesses 16, in order to make possible a relatively low design of the storage unit.

[0036] Each driving wheel 24 is associated with a bush conveyor chain 12. The bolts 22 of the chain links 20 come to lie successively in corresponding recesses of the drive wheels 24 and are moved when the drive wheels 24 are activated. In this way, the overall roller shutter type cover can be displaced in a desired direction according to its activation. The driving wheel 24 is driven by the drive 25, which is likewise situated above the spirally extending recesses 16.

[0037] Power supply cables or the like may be rolled up and accommodated in a cable drum 26 (see Fig. 1).

[0038] The drive shaft 23 may alternatively (in departure from the figures) extend in the axial direction beyond the storage unit at one end. At this end, an external driving wheel may then be arranged on the drive shaft 23, by means of which the connection to an external drive assembly can be produced directly or indirectly.

[0039] Especially in the case of manual operation of the roller shutter type cover, a driving wheel or a driving assembly may be omitted. The storage unit, preferably designed in the manner of a cassette, may have a cover (not shown in the figures) whose edge sticks out at the side beyond the cassette. The sideways projecting edge of the cassette may lie against a bearing frame of a bottom bearing when the storage unit is inserted into an opening of the installation pit. The bearing frame may be designed in particular as a lost formwork, which is used during the fabrication of a corresponding installation pit wall.

List of reference numbers: [0040] 10 Girder belt 11 Girders 12 Bush conveyor chain 13 Side wall 14 Cross brace 15 Guiding plate 16 Recess (spirally extending) 17 Guide roller 18 Recess (rectangular) 19 Girder top side 20 Chain link 21 Articulation 22 Bolt 23 Drive shaft 24 Driving wheel 25 Drive 26 Cable drum

Claims

Use of a storage unit with respective transversely arranged mutually symmetrical guides for a substantially helical extension, wherein a cover assembled to a beam belt (10) by a plurality of support beams (11) in a manner that a roller grille is mounted to could be displaced for receiving the roller grating type for covering installation excavations, the transverse guides each being formed of substantially spirally extending recesses (16), the spirally extending recesses (16) being formed such that guide rollers (17) can be received therein, characterized in that the spirally extending recesses (16) are formed in guide plates arranged at a distance from the transverse excavation walls.

Use according to claim 1, characterized in that the guide plates (15) are each located at a distance of mainly 20 to 40 mm, preferably mainly 25 mm from the corresponding transverse excavation wall.

Use according to claim 1 or 2, characterized in that the spirally recesses (16) in the guide plates (15) can be made by laser cutting.

Use according to any one of the preceding claims, characterized in that the spirally extending recesses (16) in the guide plates (15) are designed as continuous.

Use according to any one of the preceding claims, characterized in that the spirally extending recesses (16) in the guide plates (15) are designed as non-continuous, for example U-shaped.

Use according to any one of the preceding claims, characterized in that the storage unit is designed as a single unit.

Use according to any one of the preceding claims, characterized in that the storage unit extends predominantly in the vertical direction, wherein the ratio of vertical to horizontal extent is preferably in a ratio of 1.3 to 3.0, in particular 1.7 to 2, 5, e.g. 1.9.

Use according to any one of the preceding claims, characterized in that at the inlet and outlet area of the girder belt above the mainly spirally extending recesses (16) a drive shaft comprises at least one associated drive wheel (24) and preferably a drive unit (25). .

Use according to any one of claims 1-5, wherein the roller-grating cover comprises a plurality of support beams (11) forming a cover assembly in the form of a girder belt (11) together with at least one connecting means, in particular a conveyor chain, which cover is supported for. being displaceable in guides by guide rollers (17) of the supporting beams (11), the guide rollers (17) and / or connecting means being received at least partially within recesses (18) of the associated supporting beams (11) or the front area thereof, the overall structural height resulting from the respective beams (11) and associated guide rollers (17) as well as connecting means can be kept low, in which case, on either side of the beams (11), beams extensions formed of angular profiles and in the recesses (18) are arranged. ) is designed where one leg of the angular profiles represents a flushing extension see of the support surface, and another leg of the angular profiles is connected, in particular welded, to the support beam (11).

Use according to claim 9, characterized in that the supporting beams (11) are interconnected by two bushing transport chains (12) extending parallel to the guides, wherein each supporting beam (11) forms a link of the bushing transport chain, each of which the guide sections (21) are allocated to spacing between the support beams (11) and the individual joints (20) of a jointed chain being arranged in the recesses (18) of the supporting beams, in particular at the bottom thereof.

Use according to claim 9 or 10, characterized in that the guide rollers (17) are supported axially outside the individual link sections (21) on bolts (22) which interconnect the individual links of the bushing transport chain (12) and define the link axes.