RELEASABLE ATTACHMENT OF SCRAPER MODULES

Abstract

A scraper system for a conveyor system having a conveyor belt and a method for attaching a scraper module to a scraper system. The scraper system includes a system carrier and scraper modules for contacting the conveyor belt. The scraper modules are attached to a module carrier that extends on the system carrier parallel to the system carrier. The module carrier is releasably attached to the system carrier by a clamping assembly for applying a clamping force in the transverse direction to the system carrier. The clamping assembly has a clamping rod that runs parallel to the system carrier and applies the clamping force by wedge action.

Claims

1. A scraper system for a conveyor system having a conveyor belt, comprising a system carrier, and a plurality of scraper modules for lying against the conveyor belt, wherein the scraper modules are attached to a module carrier which extends on the system carrier parallel to the system carrier, wherein the module carrier is releasably attached to the system carrier by a clamping assembly for applying a clamping force in the transverse direction to the system carrier, wherein the clamping assembly has a clamping rod which runs parallel to the system carrier and applies the clamping force, and wherein the clamping assembly is configured such that the clamping force is applied by wedge action.

2. (canceled)

3. The scraper system according to claim 1, in which the clamping rod applies the clamping force via a surface pairing, wherein at least one of the surfaces of the surface pairing is a wedge surface.

4. The scraper system according to claim 1, in which at least one holding element is arranged on the system carrier, and the clamping rod is arranged between the module carrier and the holding element.

5. The scraper system according to claim 4, in which at least one counter-holding element is arranged on the system carrier at a distance from the holding element, wherein the module carrier and the clamping rod are arranged between the holding element and the counter-holding element.

6. The scraper system according to claim 1, in which the clamping rod is configured to be acted upon by a connection assembly with a tensioning force in the direction of the system carrier.

7. The scraper system according to claim 1, in which the connection assembly has a first connection element and a second connection element in the longitudinal direction of the system carrier spaced apart therefrom, wherein the scraper modules are arranged between the first and the second connection element, viewed in the longitudinal direction of the system carrier.

8. The scraper system according to claim 1, in which the module carrier and/or the clamping rod is/are connected in an articulated manner to the system carrier.

9. The scraper system according to claim 8, in which the module carrier comprises a plurality of aligned module carrier which can be separated from one another.

10. The scraper system according to claim 9, in which the module carrier segments are positively coupled to a locking element which extends parallel to the system carrier.

11. The scraper system according to claim 9, in which the module carrier segments are interconnected by a plug connection which can be established and/or released by a movement against one another parallel to a plug-in direction, wherein the plug connection is locked by a locking element which runs transversely to the plug-in direction.

12. A method for attaching a scraper module to a scraper system for a conveyor system having a conveyor belt, in which the scraper module is attached to a module carrier, the module carrier is arranged parallel to a system carrier of the scraper system and is attached to the system carrier by applying a clamping force in the transverse direction to the system carrier, wherein a clamping rod is attached parallel to the system carrier and the clamping force is applied by the clamping rod by a wedge action.

13. A scraper system for a conveyor system having a conveyor belt, comprising a system carrier, and a plurality of scraper modules for lying against the conveyor belt, wherein the scraper modules are arranged on a module carrier, wherein the module carrier has a plurality of aligned module carrier segments which are interconnected by a plug connection which can be established and/or released by a movement against one another parallel to a plug-in direction, and wherein the plug connection is locked by a locking element which runs transversely to the plug-in direction.

14. A module carrier segment for a scraper system according to claim 11, comprising at least one scraper module, a longitudinal bore for receiving a locking element, on a first end, a plug element which extends in a direction transversely to the longitudinal direction, and on a second, opposing end, a receiving opening for a plug element, wherein the receiving opening is arranged in a direction transversely to the longitudinal direction.

15. A scraper system according to claim 13 wherein the module carrier segments have a longitudinal bore, through which the locking element extends, so that the module carrier segments completely enclose the locking element.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Embodiments of the invention are described in greater detail below with reference to drawings, wherein:

[0037] FIG. 1 shows a conveyor system comprising a conveyor belt and an embodiment of a scraper system;

[0038] FIG. 2 shows the scraper system from FIG. 1 in a perspective representation;

[0039] FIG. 3 shows an exploded view of the scraper system from FIGS. 1, 2 in a perspective representation;

[0040] FIGS. 4, 5 show views of a cross-section of the scraper system from FIGS. 1-3 along A . . . A in FIG. 2;

[0041] FIG. 6 shows a perspective representation of the scraper system from FIGS. 1-5 with partially extracted module carrier segments;

[0042] FIG. 7 shows an enlarged representation of the region B from FIG. 6;

[0043] FIG. 8 shows a view of a part of the scraper system from FIGS. 1-7 in a longitudinal section;

[0044] FIG. 9 shows a second embodiment of a scraper system in cross-section;

[0045] FIG. 10 shows a third embodiment of a scraper system in a perspective view.

DETAILED DESCRIPTION OF EMBODIMENTS

[0046] FIG. 1 shows a conveyor system 10 having a conveyor belt 12 which is deflected at a tripper pulley 14.

[0047] The conveyor system 10 comprises a scraper system 20 having a number of scraper modules 24. The scraper modules each have scraping elements, here in the form of scraping lamellae 26 which are pressed against the conveyor belt 12 in order to scrape off contaminations, etc. adhering thereto.

[0048] In the case of the first embodiment shown of a scraper system 20 in the form of a so-called main scraper, the scraping elements (scraping lamellae 26) lie in contact with the lower run of the conveyor belt 12 from below.

[0049] The scraper system 20 has a system carrier 22 which is arranged running transversely to the transport direction of the conveyor belt 12. The system carrier 22 is attached to the belt framework at both ends by means of a fastening 16.

[0050] The system carrier 22 is 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.

[0051] As is obvious from FIG. 2 and in particular from the exploded representation in FIG. 3, a module carrier 30, onto which the scraper modules 24 are fastened, is attached onto the upper side of the system carrier 22.

[0052] The module carrier 30 is configured as an elongate tube. Its cross-sectional form is, as is obvious for example from the sectional representation of FIG. 4, externally substantially rectangular (with rounded-off corners). Internally, the module carrier 30 has a longitudinal bore 32 into which a circular rod is plugged as a locking element 34.

[0053] As is very obvious in particular from the enlarged representation in FIG. 7, base plates 36, onto which the scraper modules 24 are releasably fastened, preferably by screw connections, are each firmly attached onto, preferably welded onto, the upper side of the module carrier 30. The scraper modules 24 each comprise angles 38 which are fastened by means of screw connections to the module carrier 30. Scraping levers 42 are attached to the angles 38 via hinges 40, which scraping levers carry the scraping lamellae 26. The hinges 40 are each embodied as spring hinges so that the scraping lamellae 26 can be pressed against the belt 12 under spring tension.

[0054] The module carrier 30 with the scraper modules 24 fastened thereto is, as depicted in FIG. 3, releasable from the system carrier 22. The module carrier 30 is attached to the system carrier 22 via a releasable clamping connection by means of a separate clamping rod 50.

[0055] To this end, clips 44 are attached onto the upper side of the system carrier 22, in each case with a front holding element 46 and a rear counter-holding element 48. The module holder 30 is firmly clamped by means of the clamping rod 50 within the clips 44 between the holding elements 46 and counter-holding elements 48. To this end, the clamping rod 50 has a number of wedge elements 52 distributed uniformly over its length.

[0056] The attachment of the module carrier 30 to the system carrier 22 is depicted in FIG. 4, and FIG. 5. FIG. 4 shows the module carrier 30 with a scraper module 24, the clamping rod 50 with a wedge element 52 and the system carrier 22 with a clip 44 firstly as separate, spaced elements. FIG. 5 shows the clamping assembly formed therefrom, in which the module carrier 30 is received within the clip 44 between the holding element and counter-holding element 46, 48 and clamped by the clamping rod 50.

[0057] The wedge elements 52 of the clamping rod 50 have, in the case of the embodiment shown, an outer wedge surface 54 which forms, in the example shown, a wedge angle of approx. 15°. The wedge surface 54 forms a surface pairing with the inside of the holding element 46 (see FIG. 5). When the clamping rod 50 acts on the system carrier 22 in a wedge or insertion direction (tensioning force F in FIG. 5), the surface pairing between the wedge surface 54 and the holder element 46 brings about a clamping force on the module carrier 30 so that the latter is clamped within the clip (44) and held in a frictionally engaged manner.

[0058] The tensioning force F acting on the clamping rod 50 in the insertion direction is applied by a connection assembly having screws 56a and nuts 56b. Two screws 56a are spaced apart from one another in the region of both ends of the clamping rod 50 and penetrate the clamping rod which has a wider configuration there. By tightening the nuts 56b, the tensioning force F is applied to the clamping rod 50, by means of which tensioning force the clamping holding device is tensioned.

[0059] The module carrier 30 is, as is obvious in particular from FIG. 3, attached to the system carrier 22 at the end represented on the right there by means of a hinge 58 so that, when the clamping connection is released, it can be swiveled with respect to this. The hinge 58 is attached between the locking element 34 of the module carrier and the system carrier 22. As depicted, the module carrier 30 can be pivoted thereon between a swiveled-out position, in which the module carrier 30 is spaced apart from the system carrier 22 (FIG. 3 and FIG. 4) and an operating position, in which the module carrier 30 is positioned directly on the system carrier 22 parallel to the system carrier (FIG. 2, FIG. 5). Thus, by operation from the side, it is possible to release the module carrier 30 simply from the system carrier 22, without having to carry out work in the region beneath the conveyor belt 12.

[0060] The module carrier 30 is not in one piece in the embodiment shown, but rather is composed of individual, aligned module carrier segments 30a, 30b, 30c which are pushed onto the locking element 34.

[0061] The module carrier segments 30a, 30b, 30c are each interconnected by a secured plug connection. As is obvious from FIG. 7, the module carrier segments 30b, 30c each have a pin 60, the longitudinal direction of which is aligned perpendicularly to the longitudinal direction of the system carrier 22 and the locking element 34. The pin 60 is attached to a tongue protruding at one end of the module carrier segment 30b, said tongue being part of the base plate 36 of the respective module carrier segment 30b, 30c. Compatible with this, the module carrier segments 30a, 30b have bores 62 at the respective adjoining end, the bore direction of said bores likewise being aligned perpendicularly to the longitudinal direction.

[0062] In order to couple the module carrier segments 30a, 30b, 30c to one another, these are mated and arranged in an aligned manner such that in each case the pin 60 of the module carrier segments 30b, 30c engages in the bore 62 of the following module carrier segment 30a, 30b. The plug-in direction is, in each case, aligned perpendicularly to the longitudinal direction. Thus, a plug connection of the module carrier segments 30a, 30b, 30c to one another is established.

[0063] The plug connection is subsequently secured by plugging the locking element 34 in the longitudinal direction, that is to say transversely to the plug-in direction of the respective pins 60 into the bores 62, through the longitudinal bores 32 of the module carrier segments 30a, 30b, 30c.

[0064] FIG. 8 shows a longitudinal section of the secured plug connection thus formed between the module carrier segments 30a, 30b. The pin 60 engages in the bore 62. The locking element 34 is plugged transversely thereto into the aligned longitudinal bores 32. The module carrier segments 30a, 30b are thus fixed to one another in a positive manner and form the module carrier 30 when assembled.

[0065] In order to dismantle the scraper modules 24, the clamping rod 50 is first removed by releasing the connection assembly with screws 56a and nuts 56b on both sides. This releases the clamping assembly so that the module carrier 30 having the locking element 34 can be freely moved in the hinge 58. The module carrier 30 can then be swiveled out as shown in FIG. 3. By grasping handles 64 attached to the ends, the module carrier segments 30a, 30b, 30c can then be slid in the longitudinal direction (see, for example, FIG. 6). As soon as the module carrier segments 30a, 30b have been slid so far that the locking element 34 is retracted from the longitudinal bore 32, the plug connection of pin 60 and bore 62 is releasable so that the module carrier segments 30a, 30b, 30c can be removed separately from one another.

[0066] A number of changes, alternatives and modifications to the embodiment shown are possible. Thus, the clamping rod 50 can, for example, have a continually wedge-shaped cross-section, or a different number or arrangement of the wedge elements 52 can be selected. Instead of the individual clips 44, the holding elements and counter-holding elements 46, 48 can also be configured as strips which extend in the longitudinal direction of the system carrier 22.

[0067] FIG. 9 shows a second, alternative embodiment of a scraper system 120, wherein the representation corresponds to the sectional representation of the first embodiment of the scraper system 20 in FIG. 5 and, incidentally, the construction of the scraper system 120 also largely corresponds to that of the scraper system 20. Coinciding elements are identified by the same reference numerals. Only the differences between the embodiments are dealt with below.

[0068] In the case of the second embodiment of a scraper system 120, a clamping rod 150 is provided with round elements 152, while holding elements 146 attached to the system carrier 22 are each provided with wedge surfaces 154. The round elements 152 and the wedge surfaces 154 form, 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 carrier 30 between the holding element 146 and the counter-holding element 48.

[0069] FIG. 10 shows a third, alternative embodiment of a scraper system 220. Here as well, the construction of the scraper system 220 largely corresponds to that of the scraper system 20 according to the first embodiment and coinciding elements are identified by the same reference numerals.

[0070] The sole difference of the scraper system 220 compared with the scraper system 20 is the different configuration of the scraper modules 224. In the case of the third embodiment, these have scraping blocks 226.

[0071] The scraper system 220 can, for example, serve as a preliminary scraper of a conveyor system and can be attached such that the scraping blocks 226 lie in contact with the conveyor belt 12 in the region of the front side of the tripper pulley 14.

[0072] As in the case of the first embodiment, the scraper modules 224 having scraping blocks 226 are attached to a module carrier 3o which is fixed by means of a clamping holding device to the system carrier 22.