MXPA98010035A - A band direction assembly for transported band centering - Google Patents

Abstract

The present invention relates to a reversible band steering assembly for centering conveyor belts which during operation are subject to lateral displacement away from the neutral position, comprising: a rotating mechanism that supports at least one steering roller for the belt conveyor, and that is rotationally attached to a first fixed beam for rotation of an axis perpendicular to the conveyor belt, a first set of guide rollers that splice the sides of the conveyor belt and which are displaced laterally depending on the lateral displacement of the belt conveyor, and a first transfer mechanism that holds the first set of guide rollers to transfer the lateral displacement of the first set of guide rollers to the rotary mechanism, to rotate the steering rollers to a position where they guide the conveyor belt back to the neutral position, character raised because the reversible band steering assembly comprises a second set of guide rollers corresponding to the first set of guide rollers, and a second transfer mechanism corresponding to the first transfer mechanism, which the two sets of guide rollers and the two transfer mechanisms are placed mutually opposite and inverted with respect to an intermediate axis of symmetry that is transverse to the longitudinal direction of the band and extends through the axis of the rotating mechanism, and that the reversible band unit also comprises a switching mechanism to disconnect and connect the first and second transfer mechanism in relation to the rotating mechanism

Description

A BAND STEERING ASSEMBLY FOR CONVEYOR BAND CENTERING DESCRIPTION OF THE INVENTION The invention relates to a reversible band steering assembly for centering conveyor belts, comprising a rotating mechanism. which is rotatable about an axis perpendicular to the conveyor belt and which supports at least one steering roller for the conveyor belt, and a first transfer mechanism that supports first guide rollers, where the guide rollers of the conveyor belt are guided laterally in relation to the longitudinal direction of the conveyor belt and where in the case of one of the natural nematodes of the conveyor belt from the neutral position for the conveyor belt and the belt management assembly, the first Transference mechanism 1 transfers the movement of the guide rollers to the rotating mechanism for rotation of the steering rollers to a position in which they direct the conveyor belt back to the neutral position.

The band steering assembly is used to guide the conveyor belt in processing plants of various types of materials such as granulated metal ores. In DE 174491 a conveyor belt device is described for correcting the ineam in lateral coughs that occur during operation and then returning the belt to its normal position.A set of idler rollers for the conveyor belt is assembled. On a plate which is rotatably connected to the base, an arm with a transverse support is mounted on the turntable, the arm can be connected and rotated around a rotating joint which is attached to the base. s the guide rollers that move along the edge of the conveyor belt, and which in the case of one of the lateral side of the belt transfer the displacement towards the transverse support. the lever arm, which in turn transfers the displacement to the plate with the result that the steering roller shafts tilt, returning the t I put the conveyor belt in its normal position.

Document NO 178 853 discloses a band steering assembly of a similar type, although the lever arm is rotatably attached both to the plate that holds the steering rollers and to the transverse support that holds the guide rollers. The lever arm is rotatably attached to a fixed point located at a distance from the rotating fasteners on the plate and the transverse support and parallel rotary support is mounted parallel to the lever arm, between the transverse support and a fixed base on the shape of a beam, with the result that the transverse support always remains upright at right angles to the center line of the conveyor belt. Known band steering assemblies of the type described in DE 174491 and similar types have a tendency to cause migration and s to ine ine the conveyor belt, especially when there is unequal load or uneven weight distribution, thus causing wear along the edges of the band. In comparison with those other known band steering assemblies, the band steering assembly described in a document in NO 178 853 provides a more uniform movement of the conveyor belt and consequently there is less wear and a longer service life. The band address assembly described in document NO 178 853 only works when the band is moving in one direction, which is not suitable for a number of purposes. The object of the invention is to provide a band steering assembly that can be used to direct a reversible conveyor belt in both directions of travel. This object is achieved according to the invention, with a band steering assembly of the type mentioned in the introduction, characterized by the features indicated in the claims. Therefore, the invention consists of a band steering assembly comprising a rotating mechanism with at least one steering roller. Depending on the direction of deflection of the belt, the rotating mechanism with the steering roller can be controlled by means of a switch mechanism by means of two different sets of guide rollers, with the result that the steering roller returns to the band in its neutral position. In a preferred embodiment of the transverse support with the guide rollers are located perpendicular to the longitudinal direction of the transducer band, and the transfer of movement from the guide rollers to the steering roller is impregnated with the type of mechanism that is applied. described in document NO 178 853. The invention will now be explained in more detail in relation to a description of the specific embodiment, and with reference to the drawings, in which: Figure 1 is a perspective view of a steering assembly Reversible band according to the invention, Figure 2 illustrates a manual switch mechanism according to the invention, and Figure 3 illustrates an automatic switch mechanism according to the invention. The same reference numbers are used for corresponding parts in all figures. Figure 1 illustrates a reversible band steering assembly 1, comprising a first beam 2, a second beam 4 and a third beam 4 ', all of which are attached to the side members or to the frame of a conveyor with a conveyor belt . The actual conveyor with the conveyor belt is of a known type and is not shown here in order to illustrate the actual invention more clearly, although it should be understood that the first, second and third beams are attached to the side members of the conveyor with assembly clamps. 15, and that three beams are therefore firmly secured in relation to the base. The support rollers (not shown) transversally connected between the side members support the conveyor base, thereby allowing it to be moved in its longitudinal direction, indicated by the arrow P. A rotating mechanism in the form of a rotating plate 3 is attached at the half of the first beam 2 for rotation about an axis a. A beam 19 with clamps 20 is firmly secured to the turntable 3, and the clamps 20 have slots 21 for mounting a steering roller (not shown, thereby allowing it to be rotated about the axis a in the same manner as the turntable .

A first lever arm 5 is attached to the middle of the second beam 4 for rotation about an axis b, and fastening members in the shape of a pin 12 on a first end 6 of the first lever arm 5 and a fork 11 on the turntable 3 it can transfer the movement from the first lever arm to the turntable. The first lever arm 5 is additionally attached at a second end 7 to a first transverse support 8, thus allowing it to be rotated about an axis c. The first transverse support 8 also has first guide rollers rotatably mounted 9, each of which is spliced against its outer edge of the conveyor belt. A first parallel support 10 is provided parallel to the first lever arm 5 rotatably parallel to the second beam 4 for rotation about an axis d, and rotatably attached to the first transverse support 8 for rotation about an axis e. The distance bd is equal to the distance ce, and the distance bc is equal to the distance be, with the result that the second beam 4, the first lever arm 5, the first transverse support 8 and the first parallel support 10 form a parallelogram.

The first transverse support 8 will therefore always be parallel to the second beam 4, that is to say perpendicular to the longitudinal direction of the conveyor belt P. The first transverse support 8, the first parallel support 10 and the first lever arm 5 with the pin 12 thus forms a transfer mechanism for transferring movement from the first guide rollers 9 to the rotating plate 3, since a lateral displacement of the conveyor belt through its longitudinal direction P will be transferred to the first rollers of guide 9, by means of the first transverse support 8 towards the first lever arm 5, and through the pin 12 and the fork 11 towards the turntable 3, thereby causing it to be rotated about the axis a. The steering roller mounted on the clamps 20 on the beam 19 which is firmly secured on the turntable 3 will therefore be tilted and exert a force directed laterally on the band, thus returning the band from the position it occupied before was displaced laterally. A second transfer mechanism, comprising a second lever arm 5 'rotatably secured to the third beam 4', a second transverse support 8 'and a second parallel support 10' for transferring movement from second guide rollers 9 'to the rotating plate 3 are positioned opposite the steering roller and corresponding to the first lever arm 5, the second beam 4, the first transverse support 8 and the first parallel support 10, with the result that the second transfer mechanism in the embodiment illustrated is an inversion of the first transfer mechanism. The second transfer mechanism is indicated in FIG. 1 with the same reference numbers as the first transfer mechanism, with the addition of a mark (4 ', 5', etc.) and the second transfer mechanism will not be described in FIG. detail for 'both. The first, second and third beams, the transverse supports and the beam for the steering roller are laterally adjustable by means of outer telescopically movable square tubes 16 and internal square tubes 17, thus allowing the band steering assembly to be adjusted to to guide the conveyor belt to a desired neutral position. In addition, the transverse supports have fasteners 18 for adjusting the contact angle of the guide rollers towards the edges of the conveyor belt. When the conveyor belt is moved in the direction indicated by the arrow P the turntable 3 is controlled by the first transfer mechanism as shown in Figure 1. When the conveyor belt is inverted so that its direction of travel is opposite to that of the conveyor belt. direction from the arrow P, the first transfer mechanism is disconnected and the second transfer mechanism is connected by coupling with the turntable 3 by means of a switch mechanism, the fork 11 which is carried out coupling with the pin 12 and the fork 11 'is carried in engagement with the pin 12 '. Figure 2 illustrates one embodiment of the switching mechanism, in which the forks 11, 11 'are connected to each other by means of a fork support 26. The fork support is passed through and guided laterally by a bearing and guide 27. , and can be manually moved in its longitudinal direction with a handle 13, thereby causing the forks to be moved in and out of engagement with the pins.

By means of the fork support, one embodiment of the switch mechanism is obtained in which the turntable can be connected to only one transfer mechanism at a time, since one fork will be removed from the coupling at the same time that the other fork is moved in coupling with its respective pin. The. Figure 3 illustrates an electrically driven switch mechanism where the fork support 26 is moved by an actuator 14 in the form of grid 28 driven by an electric motor 29. The electric motor can be controlled manually, or can be controlled by a signal indicating the direction of displacement of the conveyor belt. The illustrated embodiment of the conveyor belt device is the so-called "oversteer", that is, it is designed to direct the conveyor belt when it moves in a creeping direction on the underside of the conveyor. Correspondingly, "understeer" is used to direct the conveyor belt when moving in a direction of travel over the top of the conveyor. In principle the oversteer will be similar to the understeer, although the design will be slightly different due to the union of the lateral members of the conveyor. The invention has been explained in the foregoing with reference to a specific embodiment. It has been shown here how the specific object is achieved with the provision of a band steering assembly that is capable of driving a reversible conveyor belt in both directions of travel. The illustrated embodiment of the transfer mechanism, wherein the second beam 4, the first lever arm 5, the first transverse support 8 and the first parallel support 10 form a parallelogram, is a preferred embodiment of the invention since it is demonstrated, as described in document NO 178 853, which is favorable for the stability of the band and counteracts a tendency to sa 1 ine ami to to. This transfer mechanism can of course be designed in other forms in other embodiments, for example by moving the rotary assemblies of the parallel support in such a way that this part of the mechanism no longer forms an exact parallelogram. Another simpler version of the transfer mechanism may consist in rigidly connecting the first lever arm 5 and the first transverse support 8 to each other and omitting the first parallel support 10. Another variation can be produced by a different design of two transfer mechanisms, since that of course, there is no requirement that they be similar. This may be relevant if the conveyor belt moves by a specific direction, and it is only in exceptional cases or when there is light load that the belt goes in the other direction. Other varieties can be associated with the design of the clamping members and the switching mechanism, or the steering roller assembly. Those and other similar varieties of the invention may be implied by a person skilled in the art without departing from the invention as defined in the claims.

Claims (10)

1. A band management assembly Reversible for centering conveyor belts which during the operation are subject to lateral displacement away from the neutral position, comprising: a rotating mechanism that supports at least one steering roller for the conveyor belt, and which is rotatably attached to a first conveyor belt; Fixed beam for rotation of an axis perpendicular to the conveyor belt, a first set of guide rollers that splice the sides of the conveyor belt and. which ones are displaced laterally depending on the lateral displacement of the conveyor belt, and a first transfer mechanism that holds the first set of guide rollers to transfer the lateral displacement of the first set of guide rollers to the rotating mechanism, to rotate the steering rollers to a position where they guide the conveyor belt back to the neutral position, characterized in that the reversible belt steering assembly comprises a second set of guide rollers corresponding to the first set of guide rollers, and a second transfer mechanism corresponding to the first transfer mechanism, that the two sets of guide rollers and the two transfer mechanisms are placed mutually opposite and inverted with respect to an intermediate axis of symmetry that is transverse to the longitudinal direction of the band and extends through the axis of the mechanism rotary, and that the reversible band unit also comprises a switching mechanism for disconnecting and connecting the first and second transfer mechanism in relation to the rotary mechanism.

2. The reversible band steering assembly according to claim 1, characterized in that the first and second transfer mechanisms are comprised of a respective second lever arm extending essentially in the longitudinal direction of the conveyor belt, the first and second Lever arms are rotatably attached to a second and third fixed beams extending transverse to the longitudinal direction of the conveyor belt, the rotary joint which is positioned about an axis perpendicular to the rotating band, which the first and second arms of At the first ends confronting the rotating mechanism are provided with fastening members for coupling with corresponding fastening members of the rotary mechanism, which the first and second lever arms at second ends facing away from rotating mechanism, are rotatably joined to a first and second apo and respective transverse supports that hold the respective first and second guide assemblies, the rotary union that is positioned about an axis perpendicular to the conveyor belt, and that the first and second respective parallel supports that are parallel or essentially parallel to the first or second arms. of respective lever extend between the respective second and third respective fixed beams and the first and second respective transverse supports.

The reversible band steering assembly according to claim 2, characterized in that the switching mechanism is achieved by the securing members of the rotating mechanism which are securely interconnected and movable between a position of the securing member of the first arm of lever that is in engagement with the corresponding clamping member of the rotary mechanism while the second lever arm clamping member is out of engagement with the rotating mechanism and an opposite position.

4. The reversible band steering assembly according to claim 2 or 3, characterized in that the fastening members of the lever arms consist of pins, and that the fastening members of the rotary mechanism consist of forks.

5. The reversible band steering assembly according to one of the preceding claims, characterized in that the switching mechanism comprises a handle for manual switching.

The reversible band steering assembly according to one of the preceding claims, characterized in that the switching mechanism comprises an electrically-operated actuator for automatic switching.

7. The reversible band steering assembly according to claim 6, characterized in that the electrically driven actuator is controlled by a signal that reflects the direction of travel of the band.

8. The reversible band steering assembly according to one of the preceding claims, characterized in that the band steering assembly is laterally adjustable in relation to the longitudinal direction of the band.

9. - The reversible band steering assembly according to claim 8, characterized in that the first, second and third fixed beams are laterally attached adjustable to a fixed frame in order to be able to adjust the band steering assembly laterally.

10. The reversible band steering assembly according to claim 9, characterized in that the laterally adjustable linkage is executed with mutually mobile telescopic rails or tubes, preferably square tubes. SUMMARY OF THE INVENTION A reversible steering assembly (1) for centering conveyor belts comprises a rotary mechanism that is rotatable about an axis (a) perpendicular to the conveyor belt and which supports at least one steering roller for the conveyor belt and a first conveyor mechanism. transfer holding first guide rollers (9). The first guide rollers (9) are guided laterally by the conveyor belt in relation to the longitudinal direction of the conveyor belt (P) and, in the case of a lateral conveyor belt of the conveyor belt from one position. neutral, the first transfer mechanism transfers the movement of the first guide rollers (9) towards the rotary mechanism for rotation of the steering rollers to a position where they guide the conveyor belt back to the neutral position. The reversible band steering assembly (1) also comprises second guide rollers (9 ') and a second transfer mechanism corresponding to and positioned opposite the steering rollers and corresponds to the first guide rollers (9) and the first transfer mechanism. A switching mechanism disconnects and connects the first and second transfer mechanism in relation to the rotating mechanism, the direction of travel of the band depending.