DE1032497B - Overhead traveling crane with box-like bridge girder that is open at the bottom - Google Patents

Description

The bridge girders of the overhead traveling cranes used in workshops etc. must have a get quite large section height to that for to maintain the maximum load required strength. Because of this increased space requirement, this means a Significant disadvantage, since the usable vertical lift of the crane hook «is greatly reduced when the trolley is moved in the usual way on a track located at the bottom of the bridge girder.

It is therefore already known that the running rails for to accommodate the trolley within a downwardly open, box-like bridge girder. at A known construction of this type are cross members on the facing inner walls of the bridge girders at approximately half the cross-sectional height attached with vertical supports to fix the runways.

In another design, the two longitudinal halves are of the box girder designed so that the suffer facing each other, in the lower part by 90 ° inwardly curved inner walls form longitudinal supporting flanges on which the rails of the Trolley are attached. The support flanges are supported by web plates located approximately in the middle of the rail, which are connected to the lower chords of the box girder.

The overhead crane according to the invention has a downwardly open Kas tent rager in the known manner with trolley completely taken up by him and is characterized in that the top belt each of the two supporting walls consists of one with its horizontally placed legs inward U-iron consists, the lower leg of which is one of the two rails for the Trolley forms.

This type of construction is characterized by its particular simplicity, because it covers the entire top flange of the supporting walls of the bridge girder, two common U-girders are sufficient. Special runways and supports for it are not required. The use of a rolled profile as a track for trolleys is known per se, but not in connection with the Oix'rgurt itself is exploited in this sense.

In the drawing is an exemplary embodiment of the Invention shown. It shows

Fig. 1 is a half view of an overhead traveling crane,

FIG. 2 is a plan view of FIG. 1,

3 shows a cross-section to FIGS. 1 and 2 on a larger scale Maßstal).

The crane has the usual chassis 1 for \ ^T experience on rails 2, which are attached to the masonry or the like. Bucket workshop.

The bridge girder connecting the two chassis 1 consists of two supporting walls. Every supporting wall

Overhead traveling crane with
box-like bridge girder

Applicant:

Ferrand & Frantz SARL,
Villeurbanne, Rhone (France)

Representative: Dipl.-Ing. W. Meissner, Berlin-Grunewald, and Dipl.-Ing. H. Tischer, Munich 2, Tal 71,

Patent attorneys

Pierre Ferrand, Villeurbanne, Rhone (France),
has been named as the inventor

has a U-iron 3 as the upper property, the horizontally placed legs of which are directed inwards. A tube 4 serves as the lower chord of the two supporting walls and is cranked in such a way that the bridge girder has its greatest height in its central part in the usual way. The U-iron 3 and the tube 4 are connected by a continuous web 5 made of a sheet metal welded to the iron and the tube. This web 5 can optionally have openings 5 α to save weight and also for aesthetic reasons. In addition, the web 5 is reinforced in places by struts 6 welded to the U-iron 3, the web 5 and the tube 4.

The two supporting walls 3, 4, 5 are through ol> ere Cross members 7 connected to one another, the ends of which are screwed to the upper flange of the U-iron 3. The two supporting walls 3, 4, 5 are also connected by a horizontal sheet metal ceiling 8, which making it easier to walk on the overhead traveling crane for maintenance, inspection, etc. The ceiling 8 is shown in FIG. 2 not shown.

The trolley 9 has four rollers 10, each of which runs in pairs on the lower leg of the U-iron 3. These Trolley 9 carries a wind rope, the rope 12 of which carries a hook 13. The electricity is used by the motor Winch 11 fed by grinding brushes 14.

The trolley 9 is completely received within the support walls 3, 4, 5 and runs tightly under the cross members 7 and the ceiling 8. The trolley 9 is thus at the highest point within the supporting walls, and the hook 13 can be raised to the highest possible extent (see. Fig. 3). The under the height available on the roof of a hall is

809 557/164

going to be exploited, so that it is usually not necessary is to raise the roof in order to be able to install an overhead crane. The entire bridge girder has none Rivets, from which cracks can start, and the intended design leads to a simple, elegant one Layout.

The invention also results in a considerable saving in weight, since all the components of the crane are effective or all unnecessary parts are omitted. The space requirement is reduced in all directions, so that the three movements of the crane can each have the full possible amplitude. The beschrielxine Construction also makes painting and maintenance easier.

Claims (3)

Patent claims: 1. Overhead traveling crane with box-like bridge girder that is open at the bottom and both of its supporting walls on their inwardly directed sides each one of the two running rails within the carrier space Carry completely received trolley, characterized in that the top belt each of the two supporting walls made of one with its horizontally placed Schenketa inwards U-iron consists, the lower leg of which is one of the two rails in a manner known per se for the trolley makes. 2. Overhead traveling crane according to claim 1, characterized in that that the LTntergurt the supporting walls consists of a tube (4) that is connected to the one U-iron (3) formed upper chord is connected by a web (5) welded to both. 3. Overhead crane according to claim 1, characterized in that the two supporting walls with each other are connected by cross members (7) and by a horizontal ceiling (8), which are attached to the upper leg the U-irons (3) are attached to each supporting wall. Considered publications:
German Patent No. 672 168;
German patent application D 8230 XI / 35 b;
French Patent No. 505 146;
Swiss Patent No. 231 947. 1 sheet of drawings ι 809 557/164 6.58