EP1460024B1 - Swivel crane - Google Patents

Description

The invention relates to a column pivoting crane consisting essentially of the column, at the upper free end horizontally and pivotally mounted swivel arm with this longitudinally movable hoist and a Fußflansch at the lower end of the column screwed on a fixable on a finished concrete floor at any point adapter plate is.

Slewing cranes (see DE-Z: Conveying and lifting, 1971, No.8, page 444) usually have tubular columns, at the foot end of annular or square flanges or base plates are welded, via which they are fastened on a foundation. The attachment to the foundation is done by screwing, welding or similar, common in steel construction way.

As a foundation, in most cases, if there is no other possibility, a concrete foundation chosen, which has for attaching the crane corresponding facilities. The foundation is made in the usual way in concrete construction, wherein the device for later attachment of the crane are provided in the manufacture of the foundation. In this case, anchor shafts are provided for the later use of anchor bolts according to a previously known from practice anchor shafts. The anchor bolts are used in this prior art design after the setting of the concrete foundation in the anchor shafts, aligned by means of a template and cast with concrete. After the Betonabbindezeit then the Crane column mounted, aligned with nuts on the anchor bolts and screwed. Subsequently, a Betonuntergießung the Fußflansches the crane column is absolutely necessary to achieve surface contact of the foot flange of the crane column. After a further period of time required for setting the concrete substructure, the crane can be unloaded with the corresponding test load and the crane put into operation.

In a further known embodiment of the concrete foundation, the anchor bolts are cast directly into the foundation, wherein the alignment of the anchor bolts by means of templates. The assembly of the crane column is then carried out in the same manner as in the first-described embodiment. It is also necessary in any case, either on the anchor bolts to unscrew nuts or inferior to wedges on which the crane column is placed and then aligned over this.

Due to the Betonuntergießung the base flange of the crane column then takes place in this embodiment, the rigid and statically secure attachment of the crane column on the foundation.

This prior art embodiment of a device for attaching a crane adhere to decisive disadvantages. Thus, the recess of the anchor holes in the foundation production by drawing is necessary and difficult, since the exact hole pitches must be respected and static anchoring shafts down conically diverging must be formed, which in turn leads to difficulties in the manufacture, arrangement and subsequent removal of the corresponding Cladding leads. Another disadvantage of this design is that the anchor shafts can be very bad clean up and possibly existing waste hinders the static secure attachment of anchor bolts. Another disadvantage is that after the actual foundation production, the anchor must later be concreted in and after a Mindestbbindezeit of the concrete only the crane assembly can take place at which then turn a concrete underbody of the foot flange of the crane must be made. Only after setting the lower casting, which in turn leads to a considerable time delay, the crane acceptance and commissioning can take place.

These types of attachment of the column of a column jib crane described above on a foundation have the further disadvantage that the arrangement of the crane must be pre-planned to bring the concrete foundation in the right place or it is necessary to destroy the existing floor over a large area or in a complex manner to install the necessary equipment for fixing the column of the column jib crane. In particular, each of the embodiments described above has the disadvantage that in leased or leased warehouses in the construction of column jib cranes the required approval must be obtained and when leaving the hall or disassembly of the column swivel crane hall floor must be restored in a complex manner.

It is known to provide cranes at their lower foot end for attachment to an existing concrete floor with large rectangular, welded and stiffened with large gusset plates plates. These plates can only be rotated by 90 ° at a time, which can lead to difficulties with regard to the required swivel angle for brackets that can not be swiveled 360 °.

It is also known to anchor large rectangular slabs either by anchors below the concrete floor or by dowels. The holes (about 80 - 100 mm Ø) for the anchors must be introduced in a complex manner. The plates are then to be poured over the entire surface. The sub-casting requires an additional effort (hardening, concrete shrinkage) and a high level of construction to the top edge of the plate in order to bring in the lower casting.

Another disadvantage of the above-described, prior art versions of column jib cranes and their attachment is that the foot plates or foot flanges for static reasons often have to be very large and thus adversely affect the transport of the column pivot column crane and requires a considerable amount of space in storage of several column jib cranes is.

Another disadvantage of the previously known embodiments is that the base plate of the column swivel crane is generally square and often destroy embedded concrete reinforcements in the existing floor. Next is in the rectangular base plates disadvantageous that the concrete floor is linearly destroyed by the required holes, and existing in the concrete floor reinforcements then occur over a greater length either as an obstacle or destroyed. Another disadvantage of rectangular foot plates is basically that they have a much larger footprint than round base plates and form on the floor Stolperecken.

Rectangular foot flanges of columns are also known from WO 93/18253. This foot flange is mounted on a likewise rectangular adapter plate, which is fixed at its four corners on recessed into the ground anchoring pipes. The disadvantages of the above-described embodiment also apply here.

It is also known from DE-OS 19639576 the attachment of a column swivel crane on a finished concrete slab by means of screw anchors. In this embodiment, no opening for a cable feedthrough is provided and the disadvantages described above also apply here.

The object of the present invention was now to find a way, especially in existing concrete floors to make the attachment of the column of a column swivel crane so that the concrete floor is not cut open for a foundation and not destroyed and removed must be that the column swivel crane at any Place of the concrete floor can be set up that no approval procedure is required that when disassembling the column jib crane no elaborate reworking of the concrete floor are required that in the presence of obstacles in the concrete floor they can be taken into account by appropriate rotation of the adapter plate that on a Unterguss the plate can be omitted, a low height to upper edge plate is achievable, a linear perforation / load of the concrete floor avoid the energy supply without prying open the soil is made possible by the shortest route and overall a simple and fast installation of a column jib crane anywhere on a concrete floor and rapid commissioning allows.

This object is achieved in a column pivoting crane of the type mentioned in the present invention that the adapter plate is ideally formed around, at least one peripheral stand frame has on its underside and that this stand frame at least one radially extending downwardly open groove (opening) for cable entry. By this embodiment of the invention decisive advantages are achieved. Thus, for example, by turning the adapter plate, these are positioned so that the cable feed, coming from a wall or support, for example, can be guided through the groove in the stationary frame of the composite anchor plate by the shortest route. Due to the round shape of the adapter plate and the arrangement of the fixing dowels on a bolt circle near the periphery of the adapter plate, the fixing dowels are not in line with the concrete floor (this risk of cracking), but are always offset from one another, whereby the risk of cracking is avoided. Next is not repeatedly destroyed by the arranged on a bolt circle dowel a rebar in the concrete floor. In the case of expansion joints in the concrete floor, the staggered, round arrangement of the adapter plate always means that only one dowel is closest to the edge of the concrete or the expansion joint. The adjacent dowels have then again a greater distance to the concrete edge or to the expansion joint. In round adapter plates, the boom fulcrum can be much finer the local field conditions with respect to the exploitable swing angle swivel cranes with limited swivel range can be adjusted because the round adapter plate is rotatable on the outer hole circle by the uniform division of large dowel number. The round design of the composite anchor plate eliminates stumbling corners. Due to the simple geometric, round shape can easily be mounted on the top of the circumference a bevel, are avoided by the stumbling edges. Further advantages are uniform loading of the individual dowels in each position of the swivel arm, a considerable space gain or Ausladungsgewinn / Sizing gain for the arrangement of the column jib crane through the round adapter plate, facilitated transport by the only small foot flange without the large adapter plate, easier to handle during assembly of the column jib crane.

According to the invention, the adapter plate ideally has two concentric rows of holes.

It is favorable to provide the adapter plate at its upper edge with a bevel (chamfer).

Advantageously, the attachment of the adapter plate on the concrete floor by means of embedded in the concrete floor heavy duty dowels, threaded rods, washers and nuts.

Advantageously, the adapter plate in the middle of a hole for the implementation of Energieleiturigen.

It makes further sense that the compound for anchoring the plug consists of 2-component material that is cured after a very short time (usually in one hour) and the commissioning of the column swivel crane follows after a short time.

The further advantageous embodiment of the invention is described in the subclaims

Details of the invention are explained with reference to an embodiment in the drawing.

• Fig. 1
  Die Ansicht eines Säulenschwenkkranes, dessen Befestigung auf einem Betonfußboden, zum Teil im Schnitt.
• Fig. 2
  Die Einzelheit "A" der Fig. 1 in vergrößerter Darstellung.
• Fig. 3
  Die Draufsicht auf die Einzelheit nach Fig. 2 (ohne Kranfuß)

Show it

• Fig. 1
  The view of a pillar jib crane, its attachment to a concrete floor, partly in section.
• Fig. 2
  The detail "A" of Fig. 1 in an enlarged view.
• Fig. 3
  The plan view of the detail of FIG. 2 (without crane foot)

Pillar jib cranes usually consist essentially of the vertical column (1), at its upper end horizontally pivotally mounted pivot arm (2) with the lifting mechanism (3), which is mounted longitudinally displaceable on the pivot arm (2) and a Fußflansch (4) on lower end of the column (1). The foot flange (4) is screwed via threaded holes (5) of a bolt circle (11) with screws (6) on a round adapter plate (7). The adapter plate (7) has on its underside on the outside a flat stand frame (8), which identifies at least one radially extending, downwardly open groove (opening) (9). On its upper side, the adapter plate (7) is provided at its outer edge with a chamfer (10). The adapter plate (7) has an inner hole circle (11) and an outer hole circle (12). About the inner hole circle (11), the adapter plate (7) with the base flange (4) of the column (1) is connected. About the holes (13) in the outer bolt circle (12) of the adapter plate (7) this is screwed into the concrete floor (14) embedded heavy duty dowel (15), threaded rods (16) and nuts (17) on the concrete floor. Centrally in the adapter plate (7) has a hole (18) is arranged, through which the energy supply lines are inserted into the column pivoting crane. The groove (9) in the stationary frame (8) of the adapter plate (7) can be arranged by turning the adapter plate so that the Energiezuführleitungen done by this groove (9) by the shortest route.

Advantageously, the number of dowels (15) is 1.33 to 3 times larger than the number of screws (6) in the base flange (4).

Claims (14)

1. A pillar jib crane, mainly comprising a pillar (1), a jib (2) which is pivoted horizontally to its idle upper end and is equipped with a lifting gear (3) which can be actuated along the longitudinal axis of the jib, and a flange plate (4) at the bottom of the pillar (1) which is screwed to an adapter plate (7) which can be fixed to an existing concrete floor (14) at any position and which characteristically and ideally has a round shape, at least one circumferential standing frame (8) at its reverse side and that this standing frame (8) has at least one radial groove (9) which is open at the bottom for guiding cables through.
2. A pillar jib crane according to claim 1 is characterized by the fact that the adapter plate (7) has two concentric lines of holes (11 and 12).
3. A pillar jib crane according to claims 1 and 2 is characterized by the fact that the adapter plate (7) is bevelled at its upper edge (10).
4. A pillar jib crane according to claims 1 to 3 is characterized by the fact that the adapter plate (7) is fastened to the concrete floor (14) by means of heavy duty dowels (15), threaded rods (16), nut washers and nuts (17) which are embedded in the concrete floor.
5. A pillar jib crane according to claims 1 to 4 is characterized by the fact that the adapter plate (7) has a hole in its centre.
6. A pillar jib crane according to claims 1 to 5 is characterized by the fact that the heavy duty dowels (15) are fixed in the concrete floor (14) by means of a two-component material.
7. A pillar jib crane according to claims 1 to 6 is characterized by the fact that on the adapter plate (7) a non-skid painting/coating for save walking is applied.
8. A pillar jib crane according to claims 1 and 3 to 7 is characterized by the fact that the adapter plate (7) has two concentrically arranged lines of holes (12) for fastening the dowel and a bolt circle (11) for fastening the flange plate.
9. A pillar jib crane according to claims 1 to 8 is characterized by the fact that below the adapter plate (7) two standing frames (8) are used.
10. A pillar jib crane according to claims 1 to 8 is characterized by the fact that the standing frame (8) is installed at the periphery of the adapter plate (7).
11. A pillar jib crane according to claims 1 to 10 is characterized by the fact that the drill holes (13) for the heavy duty dowels (15) in the adapter plate (7) are bored in the radius of the standing frame (8).
12. A pillar jib crane according to claim 1 is characterized by the fact that the centric axis of the hole circle (11) used for fixing the crane is staggered to the centric axis of the hole circle (12) used for fastening the adapter plate (7) to the concrete floor (14).
13. A pillar jib crane according to claim 1 is characterized by the fact that the adapter plate (7) and the drill holes (13) for fastening the adapter plate (7) to the concrete floor (14) have an oval or elliptic shape or are installed in an oval or elliptic shape.
14. A pillar jib crane according to claim 1 is characterized by the fact that the adapter plate (7) has the shape of a polygon which has nearly a round shape.

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