HK1158160B - Apparatus for stripping off material from a conveyor belt of a belt conveyor - Google Patents

Description

Device for wiping off material from a conveyor belt of a belt conveyor

Technical Field

The invention relates to a device for wiping off material from a conveyor belt of a belt conveyor in the curved region of an unloading drum below the unloading point of the belt conveyor, having a wiping body consisting of a single part or a plurality of parts.

Background

The wiping device of a conventional belt conveyor arranged in the region of the unloading roller runs parallel to the roller axis. Furthermore, in the known wiping devices of rotating drums or belt conveyors, use is also made as wiping body of a wire which is screwed transversely to the surface of the drum or via a part of the outer circumference of the drum. Here, the wire is provided with a tension spring at one or both ends, which subjects the wire to a tensile stress (DE 801144).

Similar erasing devices are known from us 2878926. One or two helical springs arranged parallel to one another are used as wiping bodies here, which are likewise helically tensioned via a part of the outer circumference of the unloading drum of the belt conveyor.

The known wiping devices of german patent DE801144 and us 2878926 are not practically feasible, possibly because their cleaning effect is not ideal, in particular because the substances to be delivered have a relatively high viscosity.

Disclosure of Invention

The object of the invention is to provide a device as described above which is optimally adapted to the belt surface, takes up relatively little space and has a good cleaning effect during careful handling of the conveyor belt.

The above object is achieved by an erasing device having the features of claim 1.

The wiping body of the device according to the invention, which is made of a single part or of several parts, has a bearing member by means of which the wiping body is pulled or can be pulled onto the conveyor belt, and furthermore has a lifting member (abhebeeelement) which is arranged at a distance from the bearing member on the wiping body and supports the wiping body if the wiping body is moved in the direction of travel of the belt.

Here, it is preferable that the lifting member is fixed to a fixed position of the belt conveyor in such a manner as to have no elastic load or a strong elastic load than the supporting member. When excessive forces caused by large belt damage or foreign bodies fixed on the conveyor belt act on the wiping body and the supporting member in the tangential direction of the conveyor belt wound on the drum, the lifting member on the wiping body generates a reaction force which generates a torque away from the drum, so that the wiping body or rather the corresponding loading part of the wiping body is lifted by the conveyor belt, whereby the wiping body is moved together away from the conveyor belt damage or the foreign body is fixed.

Therefore, the erasing device of the invention cleans the conveyor belt more gently than the conventional erasing device. In particular, the inventive wiping device makes it possible, by virtue of the combination of the support member with the additional lifting member, to optimize the adaptation of the wiping body to the belt surface to be cleaned and thus to provide good cleaning results. The space required by the erasing device of the present invention is also very small, and is only slightly larger than the space required by the erasing device of the conventional U.S. patent 2878926.

Preferably, the support members and the lifting members are made of steel cables and/or steel chains. The support or lifting members produced by this technique are very flexible while being particularly strong.

According to a further advantageous embodiment of the invention, the supporting member and the lifting member are formed integrally with the wiping body, for example in that the metal chains are cast in the wiping body made of plastic or elastomer.

Alternatively, the tubular passages or cavities for the support member and the lifting member may be integrated in the wiping body, in particular integrally cast therein. According to a preferred embodiment of the invention, the cavity associated with the support member or lifting member is made as an open channel. In particular, this embodiment has the advantage that the wiping body is assembled from a plurality of components. Individual worn components can be replaced relatively quickly with new components.

An advantageous embodiment of the device according to the invention is that the wiping body comprises a plurality of wiping members which form a wiping edge and which are more resistant to wear with respect to the material of the wiping body, wherein the wiping members are manufactured and/or arranged such that the wiping edges of adjacent wiping members partially overlap. The adaptation of the wiping body to the belt surface in the region of the unloading roller of the belt conveyor and the cleaning performance of the device are thereby further improved.

A further preferred embodiment is one in which the wiping body of the device according to the invention is twisted along a spatially curved structure, that is to say drawn helically on the conveyor belt, and in which the respective lower wiping members are partially overlapped by the wiping member arranged thereon. This overlapping of the stepped arrangement of the wiping members ensures that foreign bodies fixed on the conveyor belt or damaged belt sections protruding from the upper surface of the belt do not catch on the individual wiping members.

In order to ensure an optimum adaptation of the wiping body to the belt surface, in particular when the wiping body twisted along a spatial curve approaches the conveyor belt surrounding the unloading drum, a further embodiment of the device according to the invention is provided in which the wiping body is made of a resiliently flexible material, preferably plastic and/or elastomer.

In order to keep the wear of the wiping body as low as possible with good cleaning action, it is furthermore provided that the wiping body has at least two edge regions facing the transport belt, and at least the upper or first edge region, viewed in the direction of travel of the transport belt, is formed by at least one wiping element, which has a higher wear resistance than the material of the wiping body. In particular the wiping member or members are made of hard metal and/or ceramic.

According to a further advantageous embodiment of the invention, at least one wiping member is fitted with at least one resilient member. This results in, on the one hand, a good pressing effect of the wiping member on the conveyor belt and, on the other hand, the wiping member being able to deflect when it strikes against a foreign body fixed on the conveyor belt and protruding from the upper surface of the belt or a protruding belt damage. Preferably here, the elastic member has at least one ring segment which is penetrated by the support member or the lifting member or the bar-type connection.

Drawings

Further preferred advantageous embodiments of the device according to the invention are given in the dependent claims. A number of embodiments will be described in detail below, which are illustrated by means of the figures. As shown in the figure:

figure 1 comprises a cross-sectional view of an unloading drum of a belt conveyor of a wiping device according to the invention;

FIG. 2 includes a longitudinal side perspective view of the unloading roller of the scrubbing device of FIG. 1;

FIG. 3 is a longitudinal side view of a partially fabricated swab portion of a device according to the present invention;

FIG. 4 is a cross-sectional view of the erase body of FIG. 3;

FIG. 5 is a longitudinal side view of an assembled swab body portion of the device according to the invention;

FIG. 6 is a cross-sectional view of the erase body of FIG. 5;

FIG. 7 is a longitudinal side view of an expanded partially fabricated swab portion of the device according to the present invention;

FIG. 8 is a cross-sectional view of the erase body of FIG. 7;

FIG. 9 is a longitudinal side view of a further modular swab portion of the device according to the invention;

FIG. 10 is a cross-sectional view of the erase body of FIG. 9;

FIG. 11 is a longitudinal side view of a belt conveyor discharge roller having a wiping device of the present invention; the wiping body is drawn to the conveying belt in a spiral manner by a part of the outer circumference of the unloading roller;

figure 12 is a cross-sectional view of the unloading roller of the wiping device of figure 11;

FIG. 13 is a longitudinal side view of a partially fabricated swab portion of a conveyor belt twisted along a spatially curved configuration;

FIG. 14 is a cross-sectional view of the erase body of FIG. 13;

FIG. 15 is a detail view on an enlarged scale of FIG. 13;

FIG. 16 is a longitudinal side view of a further partially fabricated wiping body portion of the conveyor belt, the wiping body being twisted along a spatially curved configuration;

FIG. 17 is a cross-sectional view of the erase body of FIG. 16;

figures 18 to 21 longitudinal side, front, top and perspective views of an unloading drum of a belt conveyor with a further wiping device according to the invention, the wiping body made of a plurality of successively arranged parts being helically drawn over a part of the outer circumference of the unloading drum onto the conveyor belt;

FIG. 22 is a detail view on an enlarged scale of FIG. 21;

FIG. 23 is a cross-sectional view of yet another erase body member;

FIG. 24 is a perspective view of the components shown in FIG. 23;

FIG. 25 is a perspective view of three components of yet another erase body;

FIG. 26 is a cross-sectional view of the erase body of FIG. 25;

FIG. 27 is a perspective view of three components of yet another erase body;

FIG. 28 is a cross-sectional view of the component of FIG. 27;

FIG. 29 is a cross-sectional view of five different embodiments of a wiping body of a device according to the invention;

figure 30 shows cross-sectional views of five different embodiments of an erase body of a device according to the invention.

Detailed Description

Fig. 1 and 2 show an unloading or turning drum 1 of a belt conveyor. The direction of travel of the conveyor belt or the direction of turning of the drum 1 is indicated by the arrow.

On the curved surface of the discharge drum around which the belt is looped, more precisely below the region where the material to be conveyed is discharged from the conveyor belt (not shown in the figures), there is arranged a wiping body 4 constructed of a single part or of a plurality of parts. The material to be transported and still adhering to the belt is separated from the belt by the wiping body 4.

The length of the wiping body 4 corresponds approximately to the axial length of the drum 1, but at least to the width of the conveyor belt. The wiping body 4 is made of a resiliently flexible material, preferably plastic and/or elastomer. The wiping body 4 has a support member 3a, for example a metal chain, preferably a steel chain, via which support member 3a the wiping body 4 is pulled over the conveyor belt. Further, the wiping body 4 has a lifting member 3b, which can likewise be made of metal or a steel chain.

The metal chains 3a, 3b are cast in the elastically flexible material of the wiping body 4 at a distance from each other. The metal chain used as the supporting member 3a is preferably provided at the upper longitudinal edge portion of the wiping body 4, and the metal chain used as the lifting member 3b is provided at the lower longitudinal edge portion of the wiping body 4. Inside the wiping body 4, two metal chains 3a, 3b are arranged substantially parallel to each other.

The support members 3a and the lifting members 3b are fixed on a support frame (bracket) or on a belt conveyor side cover plate (not shown) which is mounted to the support frame at the pivot bearing area of the unloading drum 1. The fixing locations 5a, 5b in the above-described embodiments are arranged such that the elongate wiping body 4 or the metal chains 3a, 3b extend substantially parallel to the axis of rotation of the unloading drum 1.

A metal chain used as the support member 3a is fixed to the fixing portion 5a via a tension spring or a gas spring 6a in the tension direction. A metal chain, which is also used as the lifting member 3b, can also be fixed in the tensioning direction at the fixing location 5b via a tension or gas spring 6b (see fig. 2). The spring effect of the tension or gas-filled springs 6a, 6b can be adjusted. The lifting member 3b is fastened to the fastening point 5b of the belt conveyor and is more elastic, i.e. has a greater modulus of elasticity (restoring force), than the support member 3 a. The pneumatic spring or tension spring 6a mounted at least at one end of the support member 3a reduces vibrations generated during operation of the wiping body 4.

Instead of chains, it is also possible to use wire ropes as the supporting member 3a and the lifting member 3b of the device according to the invention. At least one of the two fixing locations 5a or 5b associated with the two support members 3a or lifting members 3b, respectively, is designed with a tensioning device, for example a tensioning hook screwed on a bolt to tension the support member 3a or lifting member 3 b. The fixing points 5a, 5b or the fixing means provided there comprise predetermined separation points (solbrrechellen).

The support member 3a is subjected to a substantial restoring force during normal operation of the wiping device. Excessive forces act on the wiping body 4, which may cause the wiping body 4 to be displaced in the direction of belt travel, for example due to large belt damage or foreign bodies fixed on the conveyor belt. These can be solved by a force-limiting spring 6a, by which the support member 3a is fixed at the fixing location 5a (below) (see fig. 2 and 11). If the wiping body 4 is displaced in the direction of belt travel, the lifting member 3b starts to provide support because the lifting member 3b is fixed at the fixing location 5b without elasticity or with a significantly strong elasticity. The fixing member 5 provided there preferably has at least one preset separation point.

Due to the shape of the wiping body 4, which is arranged relative to the unloading drum 1 and the bearing members 3a and lifting members 3b arranged according to the invention, by means of the tangentially acting excessive force and the reaction force generated by the wiping body 4, a torque is generated as a result, which causes the wiping body 4 or the respective loading part 4d of the wiping body 4 to be lifted off the conveyor belt 2, the wiping body 4 sliding over the damaged part of the conveyor belt 2. These are plotted in fig. 1 by means of force vectors, wherein the conveyor belt is not shown for the sake of simplicity. Vector 16 represents the tangentially acting excess force and vector 17 represents the reaction force generated on the erase body 4; in the drawn representation, the vector 18 corresponds to the left-hand moment at the assumed roller or conveyor belt radius 19.

The wiping body 4 is constructed in such a way that the supporting member 3a and the lifting member 3b, which preferably consist of a wire rope or a steel chain, respectively, are integrated in the wiping body 4 without requiring any additional space. The erase body 4 can be made very flat, for example in the form of a stripe. The relatively flat profile of the wiping body 4 prevents material from accumulating on the wiping body and impairing the function of the wiping device.

The support member 3a and the lifting member 3b arranged at a distance therefrom are connected integrally or in a form-fitting manner to the wiping body 4. In order to obtain a form-fitting connection, a receptacle 7 or an embedded tubular sleeve 7' is made in the wiping body 4, through which the support member 3a or the lifting member 3b passes. The wiping body 4, which is made of one part or several parts, is made of plastic or a rubber-like material. The cavity 7 or the sleeve 7' is formed by injection or recasting of the material of the wiping body 4 (see fig. 6 and 10).

Alternatively, the support member 3a and the lifting member 3b may also be embedded in the material of the wiping body 4, thus forming an integral connection (see fig. 4 and 8).

The wiping body 4 has two edge regions facing the conveyor belt 2, each formed by one or more wiping members 13a, 13b, which have a higher wear resistance than the material of the wiping body 4. The wiping members (friction members) 13a, 13b are made of hard metal and/or ceramic.

Further, it can be seen from the figure that the wiping body 4 has a recess 20 on its side facing the conveyor belt, which extends in the longitudinal direction of the wiping body 4. The recess 20 is made in the shape of a trough with an arc or V-shaped cross-section.

The wear-resistant wiping members 13a, 13b can be connected with the resiliently flexible material of the wiping body 4 in various ways. For example, the wiping members 13a, 13b can have a back-projecting fixing member around which the material of the wiping body 4 is cast in one piece.

The embodiment shown in fig. 3, 4 is an erase body 4 made of one piece. In its top region facing in the direction of belt travel, it comprises wiping members 13a made of wear-resistant material, which wiping members 13a are arranged alternately at right angles to the longitudinal axis of the wiping body 4 in a projecting and retracting manner. The direction of belt travel is indicated by the arrow. The protruding wiping members (friction members) 13a thus overlap with the wiping members 13 a' arranged therebetween in a retracted manner.

Furthermore, a friction element 13b is also provided at the lower region of the longitudinal edge of the wiping body 4. The upper and lower friction members 13a, 13b are interconnected by a plurality of resilient members 4c, for example welded connections, wherein each resilient member 4c is integrally cast into the material of the wiping body 4. The elastic member 4c is made of spring steel, for example.

In addition, a spacer 7 "is cast into the wiping body 4 at a distance from the curved surface. The spacer sleeve 7 "serves as a receiving or guiding means for a cable-like or rod-like tensioning member (not shown).

The embodiment shown in fig. 5 and 6 differs from the embodiment shown in fig. 3 and 4 in that the wiping body 4 is manufactured in an assembly, that is to say assembled from a plurality of relatively long and narrow parts (one-piece components) 4d, 4 d'. The above-described arrangement makes it possible to adapt the length of the wiping body 4 simply to the width of the conveyor belt 2 to be cleaned, by adding or removing the respective component 4d, 4 d'. The elongated one-piece elements 4d, 4d ' of the wiping body 4 have two different sizes, specifically one size (4d ') that is matched to the wiping element (friction element) 13a ' set back and one size (4d) that is matched to the opposite projecting wiping element (friction element) 13 a.

At the lower longitudinal edge there is also provided a wiping member 13b, wherein the respective upper and lower friction members 13a, 13a 'of each part 4d, 4 d' are connected via a wire rope 4c or such a part made of spring steel. The resilient or connecting members 4c are cast into the respective parts 4d, 4 d'. Further, spacer sleeves or hoses or tubes 7 ', 7 "are cast into the respective parts 4d, 4 d', which are intended for receiving or guiding a rope-like or rod-like tensioning member (not shown), or for passing a steel chain or wire rope used as the support member 3a or the lifting member 3b, respectively.

Fig. 7 to 10 show two embodiments, most in accordance with the embodiments described above. The difference from the embodiment of fig. 3 to 6 is that the top area of the wiping body 4 facing the direction of belt travel is here made trapezoidal. The protruding wiping member (friction member) 13a also overlaps with the wiping member 13 a' disposed therebetween in a retreated manner.

Figures 11 and 12 show a preferred embodiment in which the wiping body 4 is made to rotate (twist) about its longitudinal axis or is adapted to rotate through approximately 90 deg., in particular made to be flexible and/or partially pre-curved, so that the wiping body 4 extends along a spatially curved surface on the belt-wound unloading drum 1. The supporting member 3a and the lifting member 3b, in the form of a wire rope or a steel chain, are integrated in the outer shape of the wiping body 4, without requiring additional space. The wiping body 4 is not pressed against the transport belt 2 as in other conventional belt scrapers, but is drawn up to the belt 2 by means of the supporting member 3a and the lifting member 3 b. It is clear that the elongated wiping body 4 operates along a spatial curve on the curved surface of the drum 1 around which the conveyor belt 2 is wound, wherein the wiping body 4 is close to the belt 2, inclined and not perpendicular with respect to the direction of belt travel. The wiping body 4 is arranged and aligned in such a way that the starting point 2a of the belt 2 on the wiping body 4 is located at or near half of the winding belt 2 on the unloading drum (see fig. 11 and 12). The exit point 2b is located a few centimeters before the transition from the circular belt guide on the unloading drum to the linear belt guide leaving the belt 2.

The wiping body 4 is manufactured as described below, not only with a length adapted to the curvature of the belt 2 or the radius 19 of the drum 1, but also to be twisted/rotated through 90 °, so that its entire length can clean the belt. If the support members 3a are oriented tangentially with respect to the curved surface of the conveyor belt 2 wound around the unloading roller 1, practically no forces are introduced into the conveyor belt 2 in the surrounding area of the conveyor belt 2, so that careful cleaning of the belt 2 can be achieved with relatively slight pressure. The embodiment shown in fig. 11 and 12 essentially achieves a limitation of the introduced forces acting on the middle region of the belt 2, which normally would have a conveyor belt material sticking.

According to the embodiment shown in fig. 13, 14, the above-mentioned wiping body 4 inclined with respect to the belt running direction, which is curved against the unloading drum 1 wound around the belt, is also designed with a plurality of wiping members (friction members) 13a, which define a wiping edge 13.1 inclined towards the belt running direction. The wiping members 13a arranged at the upper longitudinal edge of the wiping body 4 are here shaped and positioned as described below, the wiping edges 13.1 of adjacent wiping members 13a partially overlapping. The overlap ensures that the optimum cleaning effect of the conveyor belt 2 is obtained, and may therefore also be referred to as a "cleaning overlap". In the embodiment on an enlarged scale in fig. 15, two adjacent friction elements 13a with wiping edges oriented obliquely to the belt running direction are depicted in such a way that the wiping edge 13.1 of the friction element 13a in the low position is located locally within the "shadow" 10 of the friction element in the higher position. This partial overlap further ensures that belt damage or foreign matter protruding from the belt upper surface does not occur on the single friction member 13 a.

Due to the groove-shaped recess 20 in the region of the wiping body 4 facing the belt 2, it is achieved that the wiping body 4 contacts the belt 2 only with the friction members 13a, 13b of relatively small surface area, whereby the friction members 13a, 13b define the upper and lower longitudinal edges of the wiping body 4. Similar to the embodiment shown in fig. 5, 6, 9, 10, a spring steel member 4c is incorporated in each component (one-piece member) 4d, the spring steel member 4c being rigidly connected with the friction members 13a, 13 b.

A further different outer shape (cross-section) of the wiping body 4 or the sections 4d is shown in fig. 29, the sections 4d forming the wiping body 4 when arranged to each other.

Further, it is preferred that the elastic member 4c connected to the friction members 13a, 13b has at least one annular part 4a, 4b, 4 e. In the particular embodiment shown in fig. 13, 14, each elastic member 4c comprises two annular parts 4a, 4b through which a bushing 7' is passed for accommodating a wire rope or a steel chain used as the supporting member 3a or the lifting member 3 b.

Fig. 16 and 17 show an embodiment in which a sleeve or tube 7 'is used as a receptacle for the support element 3a and the lifting element 3b, between which sleeve or tube 7' a further tube or hose 7 ″ is arranged and which is integrated in the wiping body 4. The tube or hose 7 "serves as a receptacle for additional support members or connecting members, which may likewise consist of steel chains, wire ropes or metal rods. The elastic member 4c has a corresponding third annular part 4e, which part 4e is penetrated by a tube or hose 7 ".

Fig. 18 to 21 show an embodiment in which an elastic, flexible wiping body 4 twisted along a spatially curved structure is pulled onto the conveyor belt 2, wherein the wiping body 4 is formed by a plurality of relatively narrow elements (single components) 4d arranged one behind the other.

The application of force is effected by a force limiting spring, preferably a pendulum damping gas-filled spring 6a, which acts on the low-lying end of the wiping body. The force application region is designed with a predetermined separation point which ensures that the wiping body 4 is released from the relevant fixing location 5a if a predetermined maximum force is exceeded.

The single member 4d of the wiping body 4 is substantially double-ramp-shaped in cross-section. The single member 4d is cast or injection molded from plastic or rubber. In the adjoining region towards the conveyor belt 2, each individual component 4d has a flat plate 13a, 13b made of wear-resistant ceramic or hard metal, which flat plates 13a, 13b are intended to slide on the belt 2. The friction member 13a positioned on the upper part of the wiping body 4 forms a wiping edge for sweeping the belt 2 of the conveyed substance still adhering to the conveyor belt. The length of the wiping body 4 is such that the wiping body 4 projects slightly beyond the lateral edge of the conveyor belt 2 to be cleaned.

In the material of the individual members 4d of the wiping body 4, sleeves or tubes 7 'are embedded, wherein steel chains as bearing or lifting members 3a, 3b are passed through the two sleeves or tubes 7' arranged near the longitudinal edges of the wiping body 4, the bearing or lifting members 3a, 3b being fixed at fixing points 5a, 5b of the steel frame supporting the unloading drum 1 via fixing means, in particular tensioning members connected via tension springs or gas-filled springs.

Below the ridge of the double-tapered single component 4d, a further sleeve 7 "or a further tubular piece is embedded in its material. Metal rods or cables are inserted in these axially aligned sleeves or tubes 7 ". All the individual members (sections) 4d are connected to each other and slightly tensioned from the first section to the last section by means of metal rods or cables. The function of the bearing or tensioning members is overall to position the individual parts 4d of the wiping body 4 without gaps between them and to support each adjacent member 4 d. If, for example, a single component 4d is lifted due to a belt or belt connection gap damage, this movement is partially transmitted to the adjacent component 4d, which also partially lifts the adjacent component 4 d. The damaged belt or belt connecting seam runs past the wiping body 4 without damage (schadlos).

The wiping body 4 is drawn to the unloading drum 1 around which the conveyor belt 2 is wound via a supporting member 3a and a lifting member 3b extending substantially parallel to the latter, and a rod-shaped connecting member 3c extends obliquely to the direction of belt travel and forms an angle α of about 15 ° to 25 °, preferably about 20 °, with a substantially horizontal upper belt surface parallel to the axis of rotation of the unloading drum 1 (see fig. 18). The dirt particles to be wiped off the belt 2 influence the wiping edge 13.1 of the wiping member 13 a. Further, the wiping bodies 4 are arranged on the conveyor belt 2 such that the wiping bodies 4 extend over a belt wrap angle β of approximately 70 ° to 80 °, for example approximately 76 ° (see fig. 19).

The contact pressure of the wiping body 4 caused by the axial tensioning of the bearing members 3a (and the lifting members) has practically no effect on the outer zone (peripheral zone) of the belt 2, since in the region of the two ends of the wiping body 4 the support members 3a are tangentially guided to the drum 1. In the main operating range of the wiping body 4, in other words in the middle of the belt, the contact pressure is greatest, but it is limited by the tension to be adjusted on the support member 3 a. It is very advantageous that in those belt conveyors, the tension can be applied by means of the wiping device extending along a spatially curved structure on the unloading drum 1, the conveyor belt 2 of which is made of clamped or hook-connected conveyor belt pieces. The seam of the belt 2 sinks when it hits the upper end of the wiping body 4 or the individual component 4d, and the entire process is almost without force. The supporting action between the adjacent individual members 4d ensures that the seam of the belt 2 passes the wiping body 4 without being damaged.

Fig. 23 and 24 show one part (single part) 4d of the wiping body 4, the wiping body 4 being assembled from a plurality of such parts 4d arranged one behind the other. The part 4d has a substantially double-ramp-shaped cross-section, which is designed at its upper and lower longitudinal edges with friction members 13a, 13b of wear-resistant material in contact with the conveyor belt. In the less flexible and less wear-resistant material of the part 4d situated opposite it, there are integrated pipes or hoses 7', 7 "which run substantially parallel to the longitudinal edges of the part 4d for receiving (passing through) supporting, lifting elements as bearings.

Figures 25 to 28 show a further embodiment of an erase body 4 assembled from elongated single parts 4d of an erase device according to the invention. This one-piece part 4d is also made double-tapered or V-shaped and is fitted with friction members 13a, 13 b. The angle of spread theta between the edges of the single parts depends on the size of the diameter 19 of the unloading drum 1. The deployment angle θ is close to 180 °, for example 170 °. The upper friction member 13a, which faces in the direction of belt travel, acts as an erasing member and defines a straight erasing edge 13.1. The wiping edges 13.1 of adjacent and successive wiping members 13a are arranged step-like to each other. The individual components 4d of the wiping body 4 are arranged in a sheet-like manner relative to one another.

In the cross-sectional views of the various wiping bodies 4 depicted in fig. 30, the receptacles 7 as support and lifting members are made as open channels. This embodiment allows a quick change of the wiping body 4 or of the individual parts 4d of the wiping body 4. The above-mentioned changes have the advantage, inter alia, that the individual parts 4d of the wiping body are subject to higher wear and/or shorter replacement times due to the lack of friction members.

Claims (20)

1. Device for wiping material from a conveyor belt (2) of a belt conveyor, with a wiping body (4) made of one or more parts, characterized in that the wiping body (4) is fitted with a supporting member (3a) made of a wire rope and/or a metal chain, by means of which supporting member (3a) the wiping body (4) is or can be pulled over the conveyor belt (2), and in addition, is fitted with a lifting member (3b), in which wiping body (4) the lifting member (3b) is arranged at a distance from the supporting member (3a), and which lifting member (3b) supports the wiping body (4) if the wiping body (4) is moved in the direction of belt travel, wherein the wiping of material from the conveyor belt (2) is in the curved area of the unloading drum (1) in the lower part of the unloading point of the belt conveyor.

2. Device according to claim 1, characterized in that the lifting member (3b) is made of a wire rope and/or a metal chain.

3. Device according to claim 1, characterized in that the support member (3a) is arranged in a first cavity made in the wiping body (4).

4. Device according to claim 1, characterized in that the lifting member (3b) is arranged in a second housing made in the wiping body (4) at a distance from the support member (3a) or the first housing associated with the support member (3 a).

5. A device according to claim 3, wherein the first and second volumes are formed as open channels.

6. Device according to claim 1, characterized in that the support member (3a) is fitted with an extension spring and/or a gas spring (6a) in the extension direction.

7. Device according to claim 1, characterized in that the support member (3a) and/or the lifting member (3b) are fixed to a fixing member (5) having a predetermined separation point.

8. Device according to claim 1, characterized in that the wiping body (4) is made of a resiliently flexible material.

9. Device according to claim 1, characterized in that the wiping body (4) comprises at least two edge regions facing the conveyor belt (2), wherein at least the upper or at least the first edge region, seen in the direction of travel of the conveyor belt, is formed by one or more wiping members (13a, 13a '), which one or more wiping members (13a, 13 a') have a higher wear resistance than the material of the wiping body (4).

10. Device according to claim 9, characterized in that at least one wiping member (13a, 13 a') is made of hard metal and/or ceramic.

11. Device according to claim 9 or 10, characterized in that at least one wiping member (13a, 13 a') is fitted with at least one resilient member (4 c).

12. Device according to claim 11, characterized in that the elastic member (4c) comprises at least one annular part (4a, 4b, 4 e).

13. Device according to claim 12, characterized in that the annular parts (4a, 4b, 4e) of the elastic member (4c) are crossed by a support member (3a), a lifting member (3b) or a rod-or cord-like connecting member (3 c).

14. Device according to claim 1, characterized in that the wiping body (4) has a recess (20) running in the longitudinal direction of the wiping body (4) on its side facing the conveyor belt (2).

15. Device according to claim 1, characterized in that the wiping body (4) comprises a plurality of wiping members (13a, 13a '), which wiping members (13a, 13 a') define a wiping edge (13.1) and have a higher wear resistance than the material of the wiping body (4), which wiping members (13a, 13a ') are made and/or arranged in such a way that the wiping edges (13.1) of adjacent wiping members (13a, 13 a') partly overlap.

16. Device according to claim 15, characterized in that the wiping edges (13.1) are arranged in a mutually stepped arrangement.

17. Device according to claim 15, characterized in that the wiping edges (13.1) are arranged alternately in a projecting or retracting manner with respect to each other.

18. Device according to claim 1, characterized in that the wiping body (4) is formed by overlapping parts (4d), which parts (4d) are placed in rows on a common rod-like connecting member (3 c).

19. Device according to claim 1, characterized in that the wiping body (4) is drawn torsionally along the spatially curved structure to the conveyor belt (2).

20. Device according to claim 8, characterized in that the wiping body (4) is made of plastic.