EP2511223B1 - Method for producing a lifting device in the ground and use of same - Google Patents

Description

The present invention relates to a method for producing a countersunk in the ground arranged lifting device for motor vehicles od. Like .. Further, the present invention relates to the use of at least one steel cassette for receiving a lifting device.

Lifting devices of the type mentioned are used for lifting motor vehicles in motor vehicle workshops, gas stations or in research companies that deal with motor vehicles. Preferably, lifting devices of this type are sunk in the ground, in particular hall floor arranged such that they can be easily run over by a vehicle in the lowered position. Thus, the vehicle can be positioned over the lifting device and lifted by the lifting device to a desired height. In the operation of such lifting devices, only the lifting rods or lifting cylinders are present above the respective floor, so that a maximum of large space between the raised motor vehicle and the ground is present. Such a lifting device is in the US 5,860,491 described.

It is also known to arrange lifting devices of the type mentioned within cuboidal cassettes, in particular steel cassettes. The cassettes are used to hold the actual lifting units, in particular the hydraulics and / or electromotive. The cassettes are arranged sunk in the prior art within prefabricated concrete shafts. The effort is relatively high.

The present invention is therefore based on the object of specifying a method which is considerably simpler in terms of the production of a sunk in the ground arranged lifting device without the functionality suffers. Furthermore, it is an object to provide recording cassettes that can be handled particularly easily for the stated purpose.

With regard to the method, the stated object is achieved by the method steps according to claim 1, wherein the dependent claims indicate preferred details of the method according to the invention.

• Ausheben einer Bodenausnehmung bzw. Grube;
• Errichten eines Bodenfundaments, vorzugsweise aus Beton;
• Aufsetzen einer vorgefertigten Kassette, insbesondere Stahlkassette, zur Aufnahme einer Hebeeinrichtung auf das Bodenfundament;
• Ausrichten der Kassette auf dem Bodenfundament, so dass die Kassette auf dem Bodenfundament aufrecht steht und der obere Rand der Kassette letztlich bündig mit einem Hallenboden od. dgl. abschließt;
• Auffüllen der Grube mit verdichtungsfähigem Material, insbesondere bestehend aus Erdreich und Schotter, bis zu einer vorbestimmten "Installationshöhe";
• Ausbilden einer Beton- oder Mörtelschicht auf dem Niveau der vorbestimmten Installationshöhe, wodurch die Grubenfüllung stabilisiert wird;
• Anschluß von Installationsleitungen an wenigstens einer Seitenwand der Kassette und durch diese hindurch, und zwar oberhalb oder dauerhaft fixiert durch die vorgenannte Beton- oder Mörtelschicht;
• Auffüllen der Grube mit verdichtungsfähigem Material, insbesondere bestehend aus Erdreich und Schotter, bis auf ein Niveau "Unterseite Arbeits- oder Hallenboden"; und
• Errichten einer einen Arbeits- oder Hallenboden bildenden Betonschicht bis zum oberen Rand der Kassette.

The process according to the invention accordingly has the following process steps:

• Excavating a floor recess or pit;
• Building a foundation, preferably made of concrete;
• Placing a prefabricated cassette, in particular a steel cassette, for receiving a lifting device on the base foundation;
• Aligning the cassette on the bottom foundation, so that the cassette stands upright on the ground foundation and the upper edge of the cassette is ultimately flush with a hall floor or the like;
• Filling the pit with compressible material, in particular consisting of earth and gravel, up to a predetermined "installation height";
• Forming a concrete or mortar layer at the level of the predetermined installation height, thereby stabilizing the pit filling;
• Connecting installation leads to and through at least one side wall of the cassette, above or permanently fixed by the aforesaid concrete or mortar layer;
• Filling the pit with compressible material, in particular consisting of soil and gravel, up to a level "bottom work or hall floor"; and
• Erection of a concrete layer forming a working or hall floor up to the upper edge of the cassette.

The pit for receiving the above-mentioned cassette preferably has the shape of a reverse truncated pyramid. That The side walls of the pit are inclined from the ground in the upward direction obliquely outward. Thus, a lateral support of the pit sidewalls is unnecessary. In particular, no sheathing boards for concrete supporting walls are required.

According to the invention, it is conceivable to place two or more cassettes in a pit at a predetermined distance and in a predetermined association with each other. The embedding within the pit then takes place for all cassettes alike or simultaneously. The manufacturing costs are then correspondingly low for a group of cassettes or corresponding lifting devices. It is conceivable to consolidate up to 100 and more lifting devices in a common operation in the ground.

If the floor around the lifting device is to be made of concrete, a steel reinforcement is connected to the top of each cassette prior to the erection of the concrete floor.

As already mentioned, the method according to the invention is particularly suitable for the installation of steel cassettes, preferably double-walled steel cassettes, which are known per se.

In order to facilitate the adjustment of the cassettes within the pit, the cassettes are provided with height-adjustable support feet. By means of these height-adjustable support feet, the cassettes on the concrete foundation can be adjusted relatively easily, i. both bring to Lot and also level on height.

The following is based on the FIGS. 1 to 6 an embodiment of a method according to the invention shown in more detail.

Fig. 7 shows an embodiment with a plurality of lifting devices arranged side by side.

All figures show the method in a schematic longitudinal section of both the excavation and the lifting device positioned in this,

In Fig. 1 is the first step for producing a sunk in the ground arranged lifting device for motor vehicles od. Like., Namely the excavation of the soil to produce a bottom recess or pit 10. This pit has, for example, a depth of 2.70 m. The side walls of the pit are inclined obliquely outwards, so that a lateral support of the side walls is not required.

It then follows the establishment of a foundation soil accordingly Fig. 2 , This ground foundation is identified by the reference numeral 11.

On this foundation then becomes appropriate Fig. 3 a prefabricated cassette, in particular steel cassette for receiving a lifting device placed or positioned. This steel cassette is identified by the reference numeral 12. It stands on support legs 13 on the concrete foundation 11, wherein in the present case, the support legs 13 are fastened via metal dowels on the concrete foundation. On the one hand, an equipotential bonding between the steel cassette and the concrete foundation or soil is produced. Furthermore, it is prevented by the described connection of the cassette 12 on the concrete foundation 11 that upon entry of concrete between the lower edge of the cassette and concrete foundation, the cassette 12 "floats" upwards or is pushed upwards by the concrete. It should be remembered that the space between the lower edge or bottom of the cassette and concrete foundation is preferably filled with concrete. In a double-walled cassette, the concrete passes into this lower area through the gap between the lateral inner and outer side wall of the cassette. The bottom of each cassette extends only between the lateral inner walls thereof. The gap between inner and outer wall is open at the bottom. Thus, the concrete passes in filling this gap in the area below the bottom of the cassette. For the concrete filling described, there are two process versions, which are described in more detail below.

The process step of fixing the cassette to the concrete foundation is in Fig. 3 indicated. The steel cassette 12 preferably has height-adjustable supports at its four corners, so that the steel cassette can be aligned on the concrete foundation 11 and can also be level-adjusted. The height adjustment is carried out so that the upper edge 14 of the cassette 12 is approximately flush with the surface of the later workshop or hall floor. The corresponding level is indicated by the reference numeral 15 in the accompanying figures.

Then follows accordingly Fig. 4 a filling of the pit 10 with compressible material, in particular consisting of soil and gravel, up to a level below at least one laterally arranged on the cartridge 12 installation tube 16 through which hydraulic and / or electrical lines from the outside are in the cassette inside laid , In the illustrated embodiment, such installation tubes 16 are attached to two opposite sides of the cassettes. The filling material is in Fig. 4 denoted by the reference numeral 17.

After that takes place accordingly Fig. 5 a stabilization of the compressible filling material 17, which is also filled in layers in the pit and compacted, by means of a concrete or mortar layer 18 between the top of the pit filling 17 and the lower edge of the at least one installation tube 16. Then, the or the installation tubes 16 still attached a jacket tube, and upstanding out of the pit. About this jacket tube 19, the interior of the cassette remains accessible from the outside for hydraulic and / or electrical lines. It gets up in this regard Fig. 6 directed.

Subsequently, the pit 10 is completely filled with compaction-capable material, up to the level "bottom workshop or hall floor". Such a hall floor is then erected, through a corresponding concrete layer 20.

When forming the hall floor made of concrete, a steel reinforcement 21 is connected to the upper edge 14 of the cassette 12 prior to the construction of the existing concrete floor. Through this, the bearing strength of the workshop or hall floor 20 is increased in a conventional manner.

As already mentioned in the introduction, a steel cassette, in particular double-walled steel cassette is used to accommodate a lifting device, ie the hydraulic or electro-hydraulic or electro-mechanical Hubaggregate, wherein the gap between the inner and outer wall of the steel cassette may be filled with insulating or lightweight concrete. However, it is also conceivable to maintain a cavity in which cables are laid. All this can be prepared by the manufacturer.

Furthermore, it is advantageous if a cassette, in particular steel cassette is used, which is adjustable by means of height-adjustable supports on the concrete foundation 11.

In Fig. 7 an arrangement of several, namely five steel cassettes each for receiving a lifting device within a pit 10 on a correspondingly sized concrete foundation 11 is shown. As mentioned above, instead of a plurality, ie two and more steel cassettes with corresponding lifting devices at a distance from each other and in a predetermined pattern to each other within a correspondingly sized pit are positioned. The fixing of the steel cassettes is then in the same manner as above with reference to FIGS. 1 to 6 described, all of which happens simultaneously. In this respect, the sunken in the ground arrangement of several juxtaposed lifting devices is extremely simple and quick to carry out.

In Fig. 7 Furthermore, it is well recognized the above-mentioned steel reinforcement 21 for the hall floor, which is usually made of concrete.

When executing the cassettes for receiving the lifting devices made of steel, it goes without saying that it is stainless steel or surface galvanized steel, which is characterized by high corrosion resistance in the soil.

When using double-walled cassettes for receiving at least one lifting device, the gap between the inner and outer walls is usually filled with concrete, in particular lightweight concrete. In this case, two basic production methods are available:

1st embodiment:

After inserting one or more cassettes in a pit 10 they are leveled in the manner described above, by means of height-adjustable support feet. Subsequently, the pit is compacted with compactable material, in particular consisting of soil and gravel, up to a level below the laterally arranged installation pipes 16 and compacted. Then, a jacket pipe is connected to the one or more Instaifationsrohr (s) and fixed by means of concrete or mortar. Thereafter, in turn, with compactable material of the aforementioned type can be poured up to a height below an indoor floor ceiling and be compacted. On this compacted surface, the entire hall floor reinforcement is attached to the top of each cassette. The reinforcement is frictionally connected to the head part of each cassette. Then the hall floor in conjunction with the double-walled steel cassette can be cast in a single operation with concrete. The concrete between the hall floor and the cassette does not necessarily have the same quality. However, the cassette must at least be filled with concrete of the quality C20 / 25 F5-6.

2nd version:

The at least one cassette for receiving at least one lifting device is leveled within the pit 10 and secured to the concrete foundation so that it is secured against buoyancy upwards. Immediately thereafter, the space between the inner and outer wall of the cassette with concrete, for example, the quality C20 / 25 F5-6 shed to unterkannte hall floor. It is important to ensure that the space between the lower edge of the cassette and the concrete foundation with soil or concrete is poured around 15 to 20 cm high around the cartridge foot, so that the filled in the gap between the inner wall and outer wall of each cassette concrete at the bottom of the cassette not can flow away laterally to the outside.

The mentioned gap between the bottom of each cassette and the surface of the concrete foundation can not be avoided, since the concrete foundation can not always be dimensionally accurate and exactly horizontal and at the right level can be produced. Therefore, each cassette is preferably parked on height-adjustable supports on the mentioned concrete foundation 11 and leveled to solder and height. For this purpose, the mentioned lower gap is required with the disadvantage that, of course, when pouring concrete in the space between the inner side wall and lateral outer wall then concrete can escape laterally through the lower gap between the cassette and concrete foundation. This must be prevented.

The pouring of the pit 10 then happens as described above in connection with the first embodiment.

All disclosed in the application documents features are claimed as essential to the invention, as far as they are new individually or in combination over the prior art.

Reference numerals:

10

pit

11

concrete foundation

12

cassette

13

cassette support

14

upper edge of the cassette

15

Level of the hall floor

16

conduit

17

filling

18

Concrete or mortar layer

19

casing pipe

20

concrete layer

21

Steel framework

Claims (6)

1. A method for manufacturing a lifting device for motor vehicles or similar arranged embedded in the ground:

   comprising the following method steps:

   - excavation of a ground recess or pit (10);

   - provision of a concrete foundation (11);

   - placing on the concrete foundation (11) of a prefabricated cassette (12) for receiving a lifting device;

   - alignment of the cassette (12) on the concrete foundation (11);

   - filling of the pit (10) with material (17) capable of compaction, especially comprising earth and crushed stone, up to a predetermined installation height, especially up to a height below at least one installation pipe (16) arranged laterally on the cassette (12), through which hydraulic and/or electrical lines from the outside into the interior of the cassette can be laid;

   - formation of a concrete or mortar bed (18) at the level of the installation height, especially between the upper side of the pit filling (17) and the at least one installation pipe (16);

   - connection of installation line in at least one side wall of the cassette and through the latter, especially attachment of a connecting or conduit pipe (19) to the installation pipe (16) upwards out of the pit (10);

   - filling of the pit (10) with material capable of compaction, especially comprising earth and crushed stone, up to a level "lower side of the workshop or factory floor"; and

   - provision of a concrete bed (20) up to the upper edge (14) of the cassette (12) forming a workshop or factory floor.
2. The method according to claim 1,
   characterised in that
   two or more cassettes (12) are placed in the pit (10) at a predetermined spacing distance and in a predetermined arrangement relative to one another, wherein the embedding in the pit (10) is implemented in the same manner or at the same time for all cassettes (12) (Figure 7).
3. The method according to claim 1 or 2,
   characterised in that
   a steel reinforcement (21) is attached at the upper edge (14) or the top of the cassette (12) before the provision of the workshop or factory floor made from concrete.
4. The method according to any one of claims 1 to 3,
   characterised in that,
   with the use of a double-walled cassette (12), the intermediate space between inner lateral wall and outer lateral wall of the cassette (12) is filled with concrete, either before or after the filling of the pit (10), especially together with the workshop or factory floor.
5. The method according to claim 4,
   characterised in that
   the cassette (12) is placed with a spacing distance from the concrete foundation (11) upon the latter, and that the intermediate space between the lower edge or base of the cassette (12) and concrete foundation (11) is filled with concrete via the gap between the inner lateral wall and outer lateral wall of the cassette (12).
6. The method according to claim 5,
   characterised in that
   the intermediate space between the lower edge or base of the cassette (12) and concrete foundation (11) is sealed around the cassette (12) with material capable of compaction before the filling with concrete.

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