Patent ID: 12227368

DETAILED DESCRIPTION OF EMBODIMENTS

FIG.1shows a conveyor system10having a conveyor belt12which is deflected at a tripper pulley14.

The conveyor system10comprises a scraper system20having a number of scraper modules24. The scraper modules each have scraping elements, here in the form of scraping lamellae26which are pressed against the conveyor belt12in order to scrape off contaminations, etc. adhering thereto.

In the case of the first embodiment shown of a scraper system20in the form of a so-called main scraper, the scraping elements (scraping lamellae26) lie in contact with the lower run of the conveyor belt12from below.

The scraper system20has a system carrier22which is arranged running transversely to the transport direction of the conveyor belt12. The system carrier22is attached to the belt framework at both ends by means of a fastening16.

The system carrier22is configured, in the example shown, as a circular tube having three aligned segments, two outer and one central segment, which are fastened to one another by means of flanges.

As is obvious fromFIG.2and in particular from the exploded representation inFIG.3, a module carrier30, onto which the scraper modules24are fastened, is attached onto the upper side of the system carrier22.

The module carrier30is configured as an elongate tube. Its cross-sectional form is, as is obvious for example from the sectional representation ofFIG.4, externally substantially rectangular (with rounded-off corners). Internally, the module carrier30has a longitudinal bore32into which a circular rod is plugged as a locking element34.

As is very obvious in particular from the enlarged representation inFIG.7, base plates36, onto which the scraper modules24are releasably fastened, preferably by screw connections, are each firmly attached onto, preferably welded onto, the upper side of the module carrier30. The scraper modules24each comprise angles38which are fastened by means of screw connections to the module carrier30. Scraping levers42are attached to the angles38via hinges40, which scraping levers carry the scraping lamellae26. The hinges40are each embodied as spring hinges so that the scraping lamellae26can be pressed against the belt12under spring tension.

The module carrier30with the scraper modules24fastened thereto is, as depicted inFIG.3, releasable from the system carrier22. The module carrier30is attached to the system carrier22via a releasable clamping connection by means of a separate clamping rod50.

To this end, clips44are attached onto the upper side of the system carrier22, in each case with a front holding element46and a rear counter-holding element48. The module holder30is firmly clamped by means of the clamping rod50within the clips44between the holding elements46and counter-holding elements48. To this end, the clamping rod50has a number of wedge elements52distributed uniformly over its length.

The attachment of the module carrier30to the system carrier22is depicted inFIG.4, andFIG.5.FIG.4shows the module carrier30with a scraper module24, the clamping rod50with a wedge element52and the system carrier22with a clip44firstly as separate, spaced elements.FIG.5shows the clamping assembly formed therefrom, in which the module carrier30is received within the clip44between the holding element and counter-holding element46,48and clamped by the clamping rod50.

The wedge elements52of the clamping rod50have, in the case of the embodiment shown, an outer wedge surface54which forms, in the example shown, a wedge angle of approx. 15°. The wedge surface54forms a surface pairing with the inside of the holding element46(seeFIG.5). When the clamping rod50acts on the system carrier22in a wedge or insertion direction (tensioning force F inFIG.5), the surface pairing between the wedge surface54and the holder element46brings about a clamping force on the module carrier30so that the latter is clamped within the clip (44) and held in a frictionally engaged manner.

The tensioning force F acting on the clamping rod50in the insertion direction is applied by a connection assembly having screws56aand nuts56b. Two screws56aare spaced apart from one another in the region of both ends of the clamping rod50and penetrate the clamping rod which has a wider configuration there. By tightening the nuts56b, the tensioning force F is applied to the clamping rod50, by means of which tensioning force the clamping holding device is tensioned.

The module carrier30is, as is obvious in particular fromFIG.3, attached to the system carrier22at the end represented on the right there by means of a hinge58so that, when the clamping connection is released, it can be swiveled with respect to this. The hinge58is attached between the locking element34of the module carrier and the system carrier22. As depicted, the module carrier30can be pivoted thereon between a swiveled-out position, in which the module carrier30is spaced apart from the system carrier22(FIG.3andFIG.4) and an operating position, in which the module carrier30is positioned directly on the system carrier22parallel to the system carrier (FIG.2,FIG.5). Thus, by operation from the side, it is possible to release the module carrier30simply from the system carrier22, without having to carry out work in the region beneath the conveyor belt12.

The module carrier30is not in one piece in the embodiment shown, but rather is composed of individual, aligned module carrier segments30a,30b,30cwhich are pushed onto the locking element34.

The module carrier segments30a,30b,30care each interconnected by a secured plug connection. As is obvious fromFIG.7, the module carrier segments30b,30ceach have a pin60, the longitudinal direction of which is aligned perpendicularly to the longitudinal direction of the system carrier22and the locking element34. The pin60is attached to a tongue protruding at one end of the module carrier segment30b, said tongue being part of the base plate36of the respective module carrier segment30b,30c. Compatible with this, the module carrier segments30a,30bhave bores62at the respective adjoining end, the bore direction of said bores likewise being aligned perpendicularly to the longitudinal direction.

In order to couple the module carrier segments30a,30b,30cto one another, these are mated and arranged in an aligned manner such that in each case the pin60of the module carrier segments30b,30cengages in the bore62of the following module carrier segment30a,30b. The plug-in direction is, in each case, aligned perpendicularly to the longitudinal direction. Thus, a plug connection of the module carrier segments30a,30b,30cto one another is established.

The plug connection is subsequently secured by plugging the locking element34in the longitudinal direction, that is to say transversely to the plug-in direction of the respective pins60into the bores62, through the longitudinal bores32of the module carrier segments30a,30b,30c.

FIG.8shows a longitudinal section of the secured plug connection thus formed between the module carrier segments30a,30b. The pin60engages in the bore62. The locking element34is plugged transversely thereto into the aligned longitudinal bores32. The module carrier segments30a,30bare thus fixed to one another in a positive manner and form the module carrier30when assembled.

In order to dismantle the scraper modules24, the clamping rod50is first removed by releasing the connection assembly with screws56aand nuts56bon both sides. This releases the clamping assembly so that the module carrier30having the locking element34can be freely moved in the hinge58. The module carrier30can then be swiveled out as shown inFIG.3. By grasping handles64attached to the ends, the module carrier segments30a,30b,30ccan then be slid in the longitudinal direction (see, for example,FIG.6). As soon as the module carrier segments30a,30bhave been slid so far that the locking element34is retracted from the longitudinal bore32, the plug connection of pin60and bore62is releasable so that the module carrier segments30a,30b,30ccan be removed separately from one another.

A number of changes, alternatives and modifications to the embodiment shown are possible. Thus, the clamping rod50can, for example, have a continually wedge-shaped cross-section, or a different number or arrangement of the wedge elements52can be selected. Instead of the individual clips44, the holding elements and counter-holding elements46,48can also be configured as strips which extend in the longitudinal direction of the system carrier22.

FIG.9shows a second, alternative embodiment of a scraper system120, wherein the representation corresponds to the sectional representation of the first embodiment of the scraper system20inFIG.5and, incidentally, the construction of the scraper system120also largely corresponds to that of the scraper system20. Coinciding elements are identified by the same reference numerals. Only the differences between the embodiments are dealt with below.

In the case of the second embodiment of a scraper system120, a clamping rod150is provided with round elements152, while holding elements146attached to the system carrier22are each provided with wedge surfaces154. The round elements152and the wedge surfaces154form, as in the case of the first embodiment, a surface pairing, with which a clamping force is generated from a tensioning force F by means of a wedge action, which clamping force clamps the module carrier30between the holding element146and the counter-holding element48.

FIG.10shows a third, alternative embodiment of a scraper system220. Here as well, the construction of the scraper system220largely corresponds to that of the scraper system20according to the first embodiment and coinciding elements are identified by the same reference numerals.

The sole difference of the scraper system220compared with the scraper system20is the different configuration of the scraper modules224. In the case of the third embodiment, these have scraping blocks226.

The scraper system220can, for example, serve as a preliminary scraper of a conveyor system and can be attached such that the scraping blocks226lie in contact with the conveyor belt12in the region of the front side of the tripper pulley14.

As in the case of the first embodiment, the scraper modules224having scraping blocks226are attached to a module carrier3o which is fixed by means of a clamping holding device to the system carrier22.