MXPA00012268A - Fastener for junction points of conveyor belts - Google Patents

Abstract

The fastener includes incorporated curved claws (4) that are used to fix it on one end of a conveyor belt. The lower fixing plate of the fastener is provided with curved, raised edges (6) enabling the tips of the claws (4) to be placed under the bars of the gates (5) that are made in the lower fixing plate by shearing and stamping. The tips of the claws (4) are locked along the lower front and rear edges (9) by lowering the bars of the gates (5) during the final tightening of the fasteners when they are fixed on the end of a conveyor belt.

Description

BRAZIER FOR CONNECTING POINTS OF CONVEYOR BANDS The invention relates to fasteners for conveyor belt joints, belts and similar products, which comprise articulation elements and are fixed in the same way through one end of the conveyor belt, the articulation elements which are capable of being placed between similar articulation elements that belong to a similar fastener in the The other end of the conveyor belt, the two fasteners that are linked by a link and articulation pin that alternately passes in an articulation element belonging to one of the two fasteners and in an articulation element belonging to the other of the two fasteners, and so on. Fasteners of this general type can be attached to one end of the conveyor belt by various known means, such as rivets, nails, double-point staples, nut and screw systems. Certain fasteners can be linked directly, without using separate fastening organs, thanks to the hooks that are part of the fastener, which are joined in the thickness of the conveyor belt when the fastener is adjusted on one end of the conveyor belt. DE-A-832 366 shows fasteners such as those in Figures 1, 2, 3 and 4 (in particular hooks 10, 11. 12, 13, Figure 3 and hooks 14, 15, 16. 17, Figure 4) The document US-A-4 344 209 also shows hooks 106, in Figure 2. A document FR-A-2 163 833 now in the public domain shows such fasteners, comprising curved hooks which, once the fastener is fixed in place, they cross through the conveyor belt completely and are pushed back underneath it and not over the bottom of the fastener (see pages 4114 to 4128). However, since a space is not excluded between the two branches of the fastener with such an arrangement, this patent considers using, in combination with the hooks included in the fastener, classic double-ended staples, whose intention is to ensure that during the operation of the fastener. the conveyor belt the two parts of the fastener forming the fixing plates do not separate in the case where the hooks, in the sense that they are adjusted, are not able to avoid such separation. Therefore, the purpose of the present invention is to propose a conveyor belt fastener, which fastening is secured by hooks that are parts of the fastener itself, but without requiring, or, in combination, separate conventional fastening means, such as clamps, rivets, nut and screw systems and that does not require for its fixation any pre-drilled holes in the end of the conveyor belt, as is the case, for example, for rivets that are frequently used.

Another intention of the invention is to propose a fastener as mentioned above, which does not include, once fixed at one end of the conveyor belt, any roughness beyond the limits of the external faces of the fixing plates, which could be trapped by a scraper like those used in many industries that use conveyor belts. This problem is solved by means of a fastener for conveyor belt connections comprising an upper fixing plate and a lower fixing plate, the two plates which are linked along their edges by U-shaped articulation elements, leaving spaces therebetween for embedding similar articulation elements belonging to another similar fastener, a pin to link and the jointing joint that is capable of being inserted into the inlaid articulation elements to produce the articulated fastener link, said fastener being provided with hooks that are part of the upper fixing plate and are oriented towards the lower fixing plate, presenting a curve or curves whose concavity is preferably oriented towards the articulation elements, characterized in that the plates comprise ports on their opposite side in the articulation elements, the ports are constituted of a small bar of the same material as that constituting the lower plate, oriented parallel to the edge of the lower plate located opposite the articulation elements and raised relative to the general plane of the lower plate, a cut that is made on each side of the small bar, the edge of the lower plate located opposite the articulation elements which are raised and which have a curved profile, the hooks of the upper plate, the ports and the raised edge of the lower plate which are respectively placed, such that when the fastener is initially opened , they are closed, the points of the hooks reach against the raised edge with a curved profile at the top, on the raised edge side with curved profile 10 facing the fastener articulation elements. A particularly advantageous embodiment of the invention will now be described as an illustrative but not limiting example, in relation to the drawing, in which: Figure 1 represents a fastener according to the invention, seen in perspective, Figure 2 represents a band of fasteners according to coupling from the cut and the swath, presented as bands of fasteners; Figure 3 represents folded fasteners embedded in one another by articulation elements, Figure 4 is a cross section of the fasteners of Figure 3 following the cut line IV-IV of Figure 3, Figures 5 and 6 show the fasteners that are tight on the end of the conveyor belt, n? iiiiiy.iMUif É i ?? Figure 7 shows in detail, following the arrow F7 in Figure 3, the fastener from the side with hooks, fixed on the end of the conveyor belt, Figure 8 shows the points of the hooks coupled in the ports, deformed by a flattening of the ports. In Figure 1, the fasteners comprise an inner fixing plate 1, with U-shaped articulation elements 2. The upper fixing plates 3 comprise hooks 4 slightly curved at the tip and at the junction with the upper fixing plate 3 The lower fixing plates 1 comprises, on its opposite side to that of the articulation elements 2, the ports 5 and at one of its longitudinal ends, a middle port 5 '. The abutments 7 that are observed, which will serve during the fastening to the block of the fastener against the edge of the end of the conveyor belt. A particularly important element is the raised edge 6, which forms an individual piece with the rest of the lower fixing plate 1. The raised edge 6 has a curved profile, both inwards and outwards and its internal curve is at a level with the entrance to the ports along the same. This curved profile plays a general stiffening role, although in particular the curve, inside, plays an essential role, which when the fasteners are placed, is to guide the tips of the hooks towards the entrance of the ports making them curved in the appropriate shape, since, when the two halves of the fastener are brought against one of the respective faces of the end of the conveyor belt, the hooks go through the thickness of the conveyor belt and their tips arrive against the internal curve of the raised edge 6, and the internal curve of the raised edge 6 which acts as a matrix progressively flexes. The curved edge sections also exist between the bases of the hooks on the edge of the upper fixing plate 3. Other interesting details will appear in the description of the fastening of the fasteners according to the invention. In Figure 2, the hooks 4, the ports 5, the stops 7, the articulation elements 2, still flat in this stage, the raised edge curve 6 are observed. It is observed that the hooks 4 have a "roof profile" "obtained by stamping on the cutting press, giving greater resistance to the hook. In Figure 3, the points of the hooks 4 can be seen coupled in the ports 5, the reinforced stops 7 which are intended to block the end of the conveyor belt on which the fastener is fixed. Figure 4 is a cross section of the fasteners of Figure 3 in which the aforementioned elements are identifiable through their references. Fastener fixation will now be explained, along with the advantages gained during fastener fixation and after the fastener has been put in place. A first advantage comes from the fact that it is not necessary to make any previous holes before fixing the bras. The latter are fixed on the ends of the conveyor belts, only because their hooks, which are traversed through the thickness of the conveyor belt separate, if no problems are used, the reinforcement wires of the conveyor belts, without cutting them and even damage them. Since no other separate classic fastening device requires pre-fabricated holes such as rivets, it is necessary due to the fastening of the hook tips, explained below, the end of the conveyor belt on which the fastener is fixed maintains its Perfectly intact tensile strength properties. To fix the fastener, it is sufficient, as shown in Figures 5 and 6, to bring it closer through the end of the conveyor belt, push it until the edge of the fastener reaches the stop. The fastener can be closed with a hammer, the lower fastening plate of the fastener that is placed on a heavy flat surface, or by means of pneumatic or hydraulic press brakes that are not specific to the fastener according to the invention. The hooks 4 then pass through the thickness of the conveyor belt and, when they arise from the conveyor belt, they come into contact with the internal curve of the raised edge of the curved profile. Since their tips are curved, they curve progressively further following this internal curve of the raised edge and are lodged under the ports, going beyond ÜHMM these and resting on the upper face of the internal fixation plate. It should be noted that when the fastener has been completely adjusted and closed on the end of the conveyor belt, the fixing of the fastener is obtained thanks, on the one hand, to the hooks passing through the thickness of the conveyor belt and on the other hand, thanks to the curve of the raised edge of the lower fixing plate which, in conjunction with the edge curves located between the bases of the hooks of the upper fixing plate, hold the end of the conveyor belt tightly. This clamping reinforces the retention of the fastener and contributes to a longer life for the joint obtained, releasing the hooks and avoiding premature tears that would otherwise finally occur under the effect of the high tensile forces applied to the hooks and transmitted through the reinforcement of the conveyor belt. This clamping also has the effect of coordinating the action of the hooks by forming a dynamic link between them, which reduces the individual tensile forces to which a single hook could be attached, cutting off the general traction between the assembly of the hooks. hooks. Finally, it is understood that the tips of the hooks 4 coupled below small bars forming the ports 5 are retained by the latter against the vertical forces that tend to open the hooks and to undo the hooks 4 from the end of the conveyor belt. This is especially true, as shown in Figure 8, at the moment that the fasteners are fixed, from the 5 small bars arrangement of the ports 5 and the points of the hooks 4, the small bars, as long as they are partially embedded in the material of the lower face of the conveyor belt, are deformed by lightly flattening and therefore press on the tips of the hooks 4 coupled below of them, which causes double bending for the tips of the hooks 4 along the lower front and rear edges 9 of the flattened ports 5, and this double bending results in a geometric locking of the port-tip assembly hook. In fact, any traction that tends to extract the tips of the hooks 4 from the ports 5 will arise against a double blockage due to these ridges 9. The fastener according to the invention therefore achieves all the intentions established at the beginning. Obviously, numerous variants are possible, which remain within the Field of the appended claims.

Claims (3)

1. Fastener for conveyor belt connections comprising an upper fixing plate and a lower fixing plate, the two plates which are linked along their 5 edges by U-shaped articulation elements, leaving spaces between them they allow similar articulation elements to be embedded belonging to another similar fastener, a link pin for articulation and joint that is capable of being inserted into the embedded joint elements to create 1C an articulated link between the fasteners, the fastener that is provided with hooks that are part of the upper fixing plate, which are oriented towards the lower fixing plate and which present a curve or curves, whose cavity is oriented towards the elements of articulation, characterized because the plates The lower parts comprise on their opposite side the articulation elements, the ports, said ports that are constituted by a small bar of the same material that constitutes the lower plate, oriented parallel to the edge of the lower plate located opposite the articulation elements and elevated in relation to 27 general plan of the lower plate, a cut that is made on each side of the small bar, the edge of the lower plate located opposite the articulation elements that is raised and that has a curved profile, the hooks of the upper plate , the ports and the raised edge of the bottom plate that are placed 2c respectively in such a way that when the fastener, The original opening is closed, the tips of the hooks come into contact with the raised edge with the curved profile on its upper part, on the side of the elevated edge with a curved profile oriented towards the articulation elements of the bra The fastener according to claim 2, characterized in that the edges with a curved profile, facing the lower fixing plate are placed on the upper fixing plates between the bases of the hooks on the side of the upper fixing plate located opposed to the elements of articulation. The fastener in accordance with one or other of claims 1 or 2, characterized in that the hooks have a "roof" profile.