CHANNEL SECTION FOR TRANSPORTATION CHAIN CONVEYORS, SUPERPOSED MENSULA AND FIXING MEDIA FOR THIS
DESCRIPTION OF THE INVENTION The invention relates to a section of channel for crawler chain conveyors with lateral restrictions arranged on both sides of an extraction channel, of which at least one is configured as an assembly part for a superimposed bracket and comprises a Test plate that is provided with recesses to fix the overlapping bracket by removable fixing means. The invention further relates to a bracket superimposed for, by means of fixing means, being fixed to a mounting part comprising a tester plate with recesses of a channel section for a chain conveyor, grooving, wherein the overlying bracket is configured U-shaped and comprises, aligned parallel to each other, an upper wing and a fixing wing with recesses for fixing means, which are connected to each other by an intermediate wing. Finally, the invention also relates to the fixing means for fixing the overlapping brackets which in a fixing wing are provided with recesses to test plates provided with recesses of sections of channel of a crawler chain conveyor.
In crawler conveyors that are used in mining extraction operations, the gutter sections that constitute an extraction gutter are restricted by lateral profiles to which the assembly parts are joined screwed, cast or welded. In the case of a pit extractor, it is usual to fix corbels or superimposed brackets in the gutter sections at least on the sides of the filling or crimp, which stand out from the lateral profile that constitutes the lateral restriction of the gutter sections and thereby they increase the load cross-section of the extraction channel on the tundish side, so that the product to be transported, extracted by means of an exploitation apparatus, does not flow out of the extraction channel on the side of the tundish. In the case of conveyors in sheltered galleries, it is also possible to have test plates on both sides with connection possibilities for overlapping brackets, in order to avoid on both sides that the transported material is lost to the outside. For the overlapping brackets numerous design forms are known, among which also overlapping brackets with profiles in the form of an angle or U, which are fixed by screwing to the lateral profiles or to the mounting parts of the channel sections (for example, DE 39 25 672 Al).
A section of gutter of the type under consideration with overlapping brackets of the generic type in question is known from DE 20 2004 004 652 Ul. In the test plates they are located, distributed along the length of the gutter section, for example, eight recesses closed around, which in the state of assembly of an overlapping bracket are in each case traversed by the threaded pin of a fixing screw. The fixing screws pass through recesses at the same time which are aligned or adapted in the lower fastening flanges of overlapping corbels which are U-shaped. The assembly of the overlapping brackets takes a long time because the screw head is inside. of the overlapping bracket and it is necessary to tighten a fastening nut below the end plate. Furthermore, it is a disadvantage that it is necessary to tighten a multitude of screws and that through the screw heads it is possible that damage to the cables takes place in a superimposed bracket which at the same time constitutes a wiring channel. The object of the invention is to create a channel section and a superimposed bracket and a fixing means for this which do not suffer from the disadvantages listed above and which allow, in particular, that the overlapping brackets can be assembled and disassembled quickly and safely by means of fixing means. In accordance with the invention, this problem is solved for the channel section and the overlapping bracket by comprising the recesses for the fastening means in the end plate of the channel section and in the fastening wing of the superimposed corbel two windows communicated through a slot in the base. which can be inserted fixing means composed of two press jaws that are tightened by a screwed connection. That is to say, in the solution according to the invention, fastening screws which, with their pin shank, pass through recesses perpendicular to the surface of the end plate and the fixing wing and press both plate surfaces between the head of the nut and the head of the screw, but the bolted connection according to the invention is tightened parallel to the plane of the head plate and the fixing wing, and both plates are pressed against each other by press jaws. With the slit, the threaded bolt of the bolted connection can pass through the slot that connects the windows, so that when assembling it is possible to insert the press jaws in the windows before tightening the bolted connection and then tighten them by tightening the bolt. tighten that is central with respect to the plane of the tester plate and the plane of the fixing wing. In a possible configuration of a channel section according to the invention, in both side constraints are provided mounting parts whose end plate comprises in each case recesses comprising two windows and a communicating groove. A section of gutter of this kind can be used in particular as a pit extractor. According to a preferred alternative configuration, a lateral restriction consists of a brush guide, so that the channel section then forms a section of a brush channel in total. In this embodiment, only one end plate is provided in the mounting part of the gripping side, in which it is possible to fix overlapping brackets and that for this purpose it is provided with the recesses formed by windows and communicating groove. According to a favorable configuration it is possible to fix to the channel section overlapping brackets which are configured in a U-shape and which comprise, aligned in parallel, an upper wing and a fixing wing provided with recesses for fixing means, which are connected one with another by means of an intermediate wing, the recesses for the fastening means configured in the fastening wing comprising two windows communicated by a communicating groove into which the fastening means comprising two clamping press jaws can be inserted. by means of a screwed connection. According to an alternative configuration, the overlapping bracket can also be constituted by an L-shaped angular plate whose long-wing side constitutes a fixing wing and is provided with recesses comprising two windows and a communicating groove in which they can be formed. inserting the fastening means comprising two press jaws that are tightened by the screwed connection. An angular L-shaped plate is favorable in particular in the case of thin seams. It is then particularly advantageous if a flexible mat, in particular a rubber mat, is removably attached or attached to the short wing of the L-shaped angular plate. In the case of thin seams it is possible that during the operation of a section of gutter of this type the bridge of the roof of a siding that is kept open with a strut can be supported in the extreme case on the rubber mat and even temporarily deforming this rubber mat without damaging the bridge of the roofing due to the bumper of the bridge of the roof of the siding and the section of gutter. In accordance with another favorable configuration, the head plate can comprise centering recesses in which the centering pins of the overlapping bracket can be inserted. With the centering recesses and the centering pins it is possible to ensure that the windows and the communicating grooves of the head plate and the fixing wing of the overlying bracket are aligned in a matching manner before the fixing means is fixed. Insert them into the windows and then brace them by tightening the bolted connection. In the case of a superimposed cantilever having a U-shape, it is particularly advantageous if recesses comprising two windows communicated through a slot are also provided in the upper wing. This allows, then, to assemble several overlapping brackets with identical fixing means when the same section of channel is to be used in the case of very thick seams. According to another favorable configuration, in the U-shaped overlapping brackets according to the invention it is possible to weld in the upper wing holding plates parallel with respect to the intermediate wing, to which removable fasteners can be fixed to delimit a channel cabling. Conveniently, the corresponding fasteners can be provided at their front end with a projection or the like that can intervene in a corresponding locking recess in the head plate and the upper wing of a superimposed bracket. Then it is only necessary to tighten between the other end of the fastener and the fastening plate a fixing screw or the like to securely mount the fastener as delimitation of the wiring channel. Both in the channel section according to the invention and also in a superimposed bracket according to the invention, it is particularly advantageous for the windows and communicating grooves to form recesses which are essentially I-shaped. It is also preferable that one of the windows of each the notch has the edge open. The window with the open edge then coincides with the outer front edge of the end plate and of the fixing wing and / or of the upper wing, so that the screw for the fixing means is freely accessible from the outer side or from the outer side. attached to the gutter section. In easily accessible bolted connections it is then possible to use almost any tool, including electric tools to tighten the bolted connection of the fixing means. It is also preferable that the edges which limit the windows into which the communicating gap opens, are provided at least unilaterally, preferably only unilaterally with a wedge-shaped chamfer. This chamfer is then conveniently located on the underside of the head plate or of the upper wing and on the upper side of the fixing wing, so that the press jaws with their presser legs move towards each other along the chamfers In the form of a wedge, when the screwed connection is tightened, the pressing pressure perpendicular to the plane of the plate and wing increases. It is particularly advantageous if the pressing surfaces of the press jaws are also chamfered in a wedge-shaped manner. The above problem is also solved by means of fixation for the sections of channel and / or overlapping brackets according to the invention, which comprises two press jaws that are tightened by a screwed connection and can be inserted into recesses of the plate the top and the fixing wing of an overlapping bracket comprising two windows connected by a communicating groove. In accordance with the preferred configuration, both clamping jaws of the fixing means are provided with wedge-shaped chamfers on the opposing press surfaces. It is also preferable that one of the presser jaws comprise a housing for screw head, for receiving a screw head of the clamping screw, and the other clamping jaw is provided with a recess for the recessed housing of a clamping nut or the like which is screwed onto a threaded rod of the clamping screw. The outer walls of at least one of the press jaws may be configured preferably bulged or rounded to securely prevent the cables lying on the overlying brackets from being damaged by vibrations on the outer walls of the press jaws. Other advantages and configurations of the invention are apparent from the following description of exemplary embodiments schematically represented in the drawing of a channel section, a superimposed bracket and the preferred configuration of the fixing means according to the invention. In the drawing show: Figure 1 in perspective an example of embodiment of a section of gutter with brush according to the invention with superimposed bracket mounted on the side of grinding; Figure 2 in perspective the overlapping bracket as well as the fixing means, partially in exploded view; 3 shows a horizontal section through the overlapping bracket according to the invention with the end plate drawn in schematic form of a channel section according to the invention; and Figure 4 a second embodiment of a channel section according to the invention with an overlapping bracket that has the shape of L. In figure 1 is represented, designated in total with the reference symbol 10, a section of channel of compliance with the invention in its embodiment as a brush channel section, comprising, arranged in an overlapping manner, a return channel 1 and an extraction channel 2, which have lateral welded profiles 3 which restrict them laterally to laterally guide a chain creeping with chain scrapers. By means of a multitude of sections 10 of the channel of identical configuration and arranged successively, a creeping chain conveyor is formed in which then the coal obtained with an operating brush is transported as harvest (material piled up) in the extraction branch 2. In the lateral restriction of the channel section 10, posterior in FIG. 1, which in the operating operation constitutes the operating front, a brush guide 4 protruding from the upper lateral profiles 3 is welded as an added part. In the front side profiles 3 in FIG. 1, which in operation constitute the side of tying, an external side plate 5 to which they are fixed is welded externally as a mounting part of the tightening side, in particular numerous parts are welded additional functionalities such as, for example, bags 6 for accommodating tags or a device 7 for connection to an arm. The angular plate 5 comprises a wing that protrudes vertically and a wing bent towards the gripping side, which for the elements of the mounting part arranged below constitutes a front plate 8 to which, by fixing means 40, a removable plate is fixed. overlapping bracket designated in total with the reference symbol 20. The angled head plate 8 is reinforced relative to the vertical protruding wing of the angular plate 5 by several welded support plates 9 which are vertical aligned to support the total weight of several 20 overlapping brackets. The overlapping bracket 20 according to the invention as well as the fixing means 40 are shown in detail also in figures 2 and 3. The overlapping bracket 20 is substantially U-shaped and comprises a lower fixing wing 21, a wing 22 superior parallel to this and an intermediate wing 23 connecting these two together, being that in the example of embodiment shown the upper wing 22 and the intermediate wing 23 consist of a piece of angled sheet that is welded with the wing 21 of base. In the example of embodiment shown, the end plate 8 of the channel section 10, the fixing wing 21 and the upper wing 22 of the overlapping bracket 20 each comprise four recesses 14, 24 and 34, which each comprise two windows 15, 25 and 35 communicating with one another through a communicating slot 16, 26 and 36. The window 25 that in each case is on the side of the gripping has the edge open, that is to say it is open towards the front edge 17, 27 and 37 of the front plate 8, of the fixing wing 21 and of the upper wing 22. In the recesses 14, 24 and 34, the fixing means 40 can be inserted in each case, which comprise two clamping jaws 41, 42 which can be tightened by means of a clamping screw 43 so that the distance between the two jaws 41, 42 pressures decreases by tightening a clamping nut 44. In the assembled state, the shank of the clamping screw 43 extends through the slits 14, 24 and 44. As can be seen particularly well in FIG., the cross section of both press jaws 41, 42 is substantially C-shaped, and the outer walls 45, 46 of both press jaws 41, 42 are rounded. In the opposing legs of the press jaws, which extend across the width of the press jaws 41, 42, a wedge-shaped chamfer is provided on the inner surfaces 47 and 48 in each case, so that the induced pressing forces in the inner surfaces 47, 48 press against each other both, the plate 8 tester and fixing wing 21 to be pressed, which are superimposed. In order to increase the pressing effect of the wedge-shaped inner surfaces 47, 48 also on the edges 18, 28 and 38 delimiting the windows 15, 25 and 35 in which the slits 16, 26 and 36 open in each case they unilaterally provide wedge-shaped chamfers. The wedge surfaces aligned in opposite directions on the inner sides of the clamping jaws 41, 42 and on the delimiting edges cooperate during the pressing. In Figure 3 it is possible to recognize the wedge surfaces 381 particularly well for the upper flange 22 of the overlapping bracket 20. On the rear side of the press jaw 42 there is provided a housing 49 for a screw head which houses, by positively locking, a screw head 43 of the clamping screw 43. A cavity 49 'for the recessed housing of the clamping nut 44 is provided on the back of the presser clamp 41. The width of the opening of the cavity 49 'must be sufficient to be able to apply a tool for tightening or loosening the clamping nut 48 in the fixing means 40. The clamping nut 44 is exposed on the front edge of the head plate 8 and the fixing wing 21.
With the superimposed bracket 20 which is placed and mounted directly on the end plate 8 of the channel section 10, it is possible to form a wiring channel 33. For this purpose, clamping plates 39 are welded parallel to the intermediate wing 23 and extend downwards in the upper wing 22, in which a fastener 50 extending between the two front flanges 37 and 27 of the wing can be detachably detached. 22 upper and the fixing wing 21. The holding plate 39 has here a square recess 51, which constitutes an anti-rotation lock of a fixing screw 52 for the fastener 50. At the lower end the fastener 50 has a centering pin 53 which cooperates with a corresponding recess in FIG. the plate 8 testera. Additionally, in order to center the bracket 20 superimposed when it is assembled, the fixing wing 21 is provided on the side edges with centering pins 29 which intervene in corresponding centering recesses 19 of the front plate 8. In addition, corresponding centering recesses 31 are provided in the upper flange 22, so that when mounting several overlapping brackets 20 on top, the windows 25, 35 and grooves 26, 36 of the recesses 24, 34 are in each case centered relative to one another. and fixing means 40 can be inserted without problem. In the intermediate flange 23 of the overlapping bracket 20, a sealing plate 60 is screwed in as a delimitation for the wiring channel 33, as illustrated in FIG. 2. With the same securing means, an additional seal 61 can also be attached to the side external facing towards the extraction channel of the intermediate wing 23. Figure 4 shows the same channel section 10 as that of the exemplary embodiment according to figure 1, but nevertheless with a modified superimposed bracket 120. The end plate 8 on the angle plate 5 on the activated side of the channel section 10 is identical to that of the first exemplary embodiment. However, the superimposed bracket 120 is constituted in this case by a L-shaped angular plate 122 having a longer fixing wing 121 and a short wing 123 extending upwards, orthogonal with respect to the previous one. Also on the fixing wing 121, recesses 124 are provided as in the first embodiment, which, as in the previous embodiment, comprise two windows communicating with one another by means of a communicating groove into which the means 40 of the invention are inserted. fixing identical to those of the first embodiment to press the front plate 8 and the fixing wing 121. In contrast to the previous embodiment, in the short wing 123 protruding upwards from the overlapping bracket 120, a vertical rubber protruding mat 161 is screwed by means of several fixing screws 160, on which the roof bridge of a bracket It can rest when descending in the case of thin veins. On both side edges of the rubber mat 161, rubber sealing pieces 162 are fixed which serve as a joint in the bracket joints. For the expert, numerous modifications that fall within the scope of perfection of the appended claims emerge from the foregoing description. Instead of I-shaped recesses, the recesses could also have a slightly different contour if the clamping jaws are also provided with another contour. Instead of four it is also possible to provide more or less recesses per end plate and retaining wing or upper wing. It is also possible to mount overlays more overlapping brackets. The superposed bracket could also be made of a piece of sheet metal with two folds.