WO2018152560A1 - Conveyor chain for conveying piece-like or pourable conveyed material - Google Patents

Abstract

The invention relates to a conveyor chain (1) for conveying piece-like or pourable conveyed material. This conveyor chain (1) comprises a first tension cord (4) and a second tension cord (5), which tension cords (4, 5) run parallel to each other. Immediately consecutive link plate elements (10) of the first tension cord (4) and immediately consecutive link plate elements (11) of the second tension cord (5) are connected in an articulated manner by means of coupling elements (9) arranged therebetween. The coupling elements (9) each have a first axis of articulation (13) and a second axis of articulation (14), which axes of articulation (13, 14) are arranged spaced apart from each other in the longitudinal direction of the conveyor chain (1). The first axis of articulation (13) is provided for articulated coupling with a first pair of link plate elements (10, 11) and the second axis of articulation (14) is provided for articulated coupling with a second pair of link plate elements (10, 11) that follow in series. A link element (10, 11) that is inclined at a predefined articulated angle position with respect to the coupling element (9) can be mechanically decoupled or removed from the coupling element (9).

Description

 Conveyor chain for conveying piece-like or free-flowing material

The invention relates to a conveyor chain for conveying piece-like or free-flowing conveying goods, as indicated in claim 1.

Conveyor chains for transporting or removing pieces of conveyed material, such as wood, rock, finished products, workpieces and the like, as well as for transporting or discharging free-flowing conveyed material, such as wood chips, biomass, animal feed or silage, grain, gravel and the like are known in various versions of the prior art. Depending on the application, such conveyor chains vary considerably in terms of their limb size or in terms of their pitch and maximum tensile strength. The conveyor chains adapted in each case in their dimensions can be used by a parallel arrangement of at least two conveyor chains for the construction of so-called transport or conveyor belts. In such transport or conveyor belts with parallel conveyor chains can be provided that at the same longitudinal or dividing position present chain links are connected to each other via carrier webs in order to ensure an optimized transport of the material to be conveyed. Alternatively or in combination, it can be provided that individual chain links of a generic conveyor chain are connected with carriers, in particular with welded-on extensions, such as sheet metal webs or bar profiles, in order to support the conveyance of lumpy or pourable material to be conveyed.

In practice, proven conveyor chains have chain links, which have mutually parallel, transversely to the longitudinal direction of the conveyor chain spaced tab members, which tab members are typically formed from a sheet metal part. Between the serially consecutive chain links hollow cylindrical or formed of solid material connecting bolts are arranged, which define the joint axes between the individual chain links. In this case, the end sections of the chain links each overlap with the adjacent end sections of a serially connected or subsequent chain link. The joint or connecting bolts therefore connect and respectively pass through the mutually facing end sections of a total of four link elements. Such a link chain is known for example as a drive chain for bicycles, electric motor drives, or as a timing chain of internal combustion engines. In such conveyor, drive or timing chains special closure or connecting members may be provided to connect the ends of the respective chain together and to be able to build a self-contained, annular chain can. These special closure or connecting members may comprise cotter pins in order to enable a tool-free activation and deactivation of the specially designed, usually only once existing link. But it can also be provided so-called rivet or welding members, in which, after appropriate riveting or welding of the respective parts separation is basically no longer provided, or only with the aid of cutting or grinding tools is possible.

The CH 36850 A describes a transmission chain with bayonet-like articulated hinges. The corresponding chain in this case comprises a plurality of completely identical, serially hung chain links. Each individual chain link can be released from the transmission chain without the aid of tools, or a chain link can be inserted into the transmission chain at any time without the need for auxiliary tools. Each of these elongated chain links has a first end, on which a semicircular joint head is formed. At the opposite, second end, the chain links on a mouth or fork-shaped end portion. In such a mouth or fork-shaped end portion of a joint head of a serially connected chain link is directly inserted, whereby a mutual positive connection can be established. A positive joining and separating serially successive chain links is only possible when taking a right angled position between see immediately consecutive chain links. In the extended position of chain links coupled to each other, the serially consecutive chain links are secured with respect to a separation and positively coupled with each other. In this positively coupled position, the semicircular hinge heads engage in the corresponding, fork-like end portions of a serially connected structurally identical chain link. However, the practical suitability and also the economic viability of such a transmission chain is only partially satisfactory. The present invention has for its object to provide a conveyor chain for conveying conveyed available, which conveyor chain has improved practicality, in particular offers the simplest possible variability of the chain length and thereby has the highest possible robustness.

The object of the invention is achieved by a conveyor chain according to the features of claim 1.

Accordingly, the conveyor chain comprises a first and a second pull cord, which pull cords run parallel to each other and are arranged transversely to the longitudinal direction of the conveyor chain spaced from each other. The first tensile strand and the second tensile strand each comprise a plurality of tab elements arranged next to one another in the longitudinal direction of the conveyor chain. Immediately successive tab members of the first tension cord and immediately successive tab members of the second tension cord are each connected by means of a common coupling element articulated. Such a coupling element is designed structurally different compared to a tab element or designed structurally independent. By a plurality of coupling elements is thereby formed a plurality of transversely to the longitudinal direction of the conveyor chain extending joint axes between a plurality of serially successive pairs of tab members of the first and second pull string.

In a conveyor chain designed according to the invention, the coupling elements each have a first joint axis and a second joint axis or define the coupling elements respectively a first and a second joint axis, wherein the first and the second joint axis are arranged with respect to each other with respect to the longitudinal direction of the conveyor chain. The first articulation axis is provided for articulated coupling with a first pair of tab members, while the second articulation axis is provided for articulated coupling with a second, serially connected pair of tab members. In this case, on the first and second articulation axis of the coupling elements, in particular on the four pivot pins of a coupling element, which articulation pins define the two joint axes, axially acting holding means, in particular in the form of limiting or Abgleitsicherungen for the coupled thereto or couplable tab elements , Such a holding means, which can be designed as a simple holding nose or as a finger-like holding extension, In this case, by adopting at least one predetermined joint angle position between the coupling element and a tab element coupled thereto or a pair of tab elements coupled thereto, it can be deactivated or overcome in its holding function relative to the respective tab element. In particular, when assuming the at least one predefined articulation angle position, a coupled tab element or a pair of coupled tab elements relative to the coupling element - and vice versa - mechanically decoupled, especially from the coupling element detachable and removable, without the need for special tools or other tools would be required. Due to the construction according to the invention a particularly practical conveyor chain is created. In particular, the specified conveyor chain, despite its manual Zerleg- and Zusam- availability, which can be done without the aid of tools, a high mechanical robustness or stability. In addition, the specified conveyor chain has a high security against unwanted dissolution or dissection. In particular, the serial arrangement of two-axis coupling elements, which respectively support a pair of link elements coupled or coupled thereto at their two joint axes, virtually excludes the possibility of undesired cancellation of the corresponding joint connections. This is ensured, inter alia, by the joint axes of the coupling element which are distanced from one another in the longitudinal direction of the conveyor chain. In particular, when the conveyor chain is in use and is claimed to train, unwanted decoupling can not or hardly occur. Another advantage is that by a serial juxtaposition or coupling of pairs of tab elements with the interposed, quasi double-articulated coupling elements and conveyor chains can be created, which can be adapted in a simple manner to the particular desired or required length , Thus, despite a mechanically relatively simple construction, a high degree of robustness, but also a practicable maintenance or packaging of a conveyor chain designed according to the invention is made possible.

The specified conveyor chain allows, for example, a very simple and rapid shortening of the chain length, for example after reaching a certain elongation due to a long service life or high stress on the conveyor chain. In particular, the desired chain tension can be restored relatively easily by removing at least a portion from the conveyor chain. Mechanical clamping device for adjusting the Chain tension of a conveying device can thus be constructed comparatively simply or have a relatively short tensioning path.

It is expedient here if the tab elements of the first tension cord and of the second tension cord are structurally identical, in particular designed as identical parts. In particular, a chain with the desired chain length can thus be constructed without problems, in particular quickly and without a compulsory requirement of auxiliary tools, with only two differently designed components, in particular with coupling elements and tab elements. Such chain systems thus allow a rapid construction and easy maintenance of existing conveyor systems or transport systems. In particular, this service and maintenance can be significantly simplified and accelerated.

According to an expedient embodiment, the coupling elements of the conveyor chain each have a central base body with four pivot pins projecting therefrom, a first pair of opposing hinge pins defining the first hinge axis and a second pair of opposing hinge pins defining the second hinge axis. As a result, the joint axes are spaced apart from one another with respect to the longitudinal direction of the conveyor chain and, as a result, maintenance of the tension in the conveyor chain reliably prevents unwanted disassembly or disassembly of the conveyor chain. Another advantage is the execution of pins or pin-like projections on the coupling elements for defining the joint axes, since such pin-like projections production technology can be relatively easily implemented and intuitive recognition of the function and operation is ensured, whereby the assembly of a corresponding conveyor chain without special enrollment - or instruction measures can be carried out.

Advantageously, the first and the second joint axis run parallel to one another. This makes it possible to guide the conveyor chain to a rotatably mounted deflection pulley or to a sprocket or can thereby be carried out with the conveyor chain also bends or deflections. Another advantage is that tensile stresses between successive chain links of the conveyor chain exactly at right angles to the each coupling joint axes run. The first and the second joint axis of the coupling elements are mutually rigidly positioned or immovable relative to each other in their relative position. According to an expedient embodiment, the pivot pins are integrally formed on the base body, so that one-piece coupling elements are formed. In particular, coupling elements are thereby created, which, starting from a central basic body, form four articulated pins projecting therefrom, in particular integrally formed thereon or integrally formed. The formation of pivot pin has, inter alia, manufacturing technology see advantages. In contrast to breakthroughs or storage bushes, such pivot pins can be produced relatively easily and inexpensively. In addition, the planned functionality of the coupling elements or of its pivot pin is intuitively recognizable. In addition, this can also make it unnecessary to design structurally independent or separate joint bolts. In particular, the variety of parts can thereby be kept low and the most cost-effective possible construction of the conveyor chain can be achieved.

Characterized in that on each of the pivot pin of a coupling element each a tab member is articulated, a clearly structured structure of the conveyor chain is possible. In addition, overlaps between serially successive tab elements are thereby avoided in sections. The longitudinal axes of serially successive tab elements can thus run in alignment, whereby the robustness of the conveyor chain is favored. In particular, no shear stresses are exerted on such a journal as would occur with two tab members per hinge pin.

According to an expedient embodiment, the retaining means are formed by retaining extensions or retaining lugs formed on the cantilevered ends of the pivot pins and extending radially relative to the respective pivot axis, which retaining projections act as axial deflection safeguards against the tab elements articulated on the respective pivot pins. In this way, the simplest possible structure of the holding extensions or the coupling elements can be achieved. In particular, an axial slipping or unwanted stripping of the tab elements away from the central base body of a coupling element can be prevented or restrained in a simple manner. Especially These holding projections can act as axially acting holders or limiting stops for a lug element rotatably mounted on the respective pivot pin.

According to an advantageous embodiment, only a single, radially extending to the respective joint axis retaining extension is formed at the free-projecting ends of the joint pin, wherein the holding extensions on the hinge pin of the first joint axis extend in a first radial direction and the holding extensions on the pivot pin of the second joint axis in a second radial direction. A particular advantage of this measure is that thereby directly successive coupling elements support and support the interposed tab elements as best as possible. In particular, an undesirable tilting of the tab elements of the first tension cord about its longitudinal center axis and an undesirable tilting of the tab elements of the second tension cord around its longitudinal center axis is thereby counteracted in a practicable manner. In particular, this ensures that a first pair of, for example, upwardly extending holding extensions counteracts a V-shaped tilting of a pair of tab elements, while a second pair of downwardly extending holding extensions on an immediately adjoining coupling element of an A-shaped embossing or spreading of a Counteracts pair of tab elements. In particular, this favors the stability of the conveyor chain with respect to tilting loads against the plate-like or strip-like tab elements and achieves an increased tilt stability of the tab elements within the conveyor chain.

Advantageously, the holding extensions extend perpendicular or approximately perpendicular to a plane connecting or receiving the first and second joint axis. Thereby, an optimized interlocking locking between the coupling elements and the tab elements can be created, which counteracts locking an unwanted decoupling between the chain parts. With exactly vertical alignment of the holding extensions or of their longitudinal axes with respect to a plane receiving the joint axes, it is advantageous that care must be taken when placing the conveyor chain on a deflection wheel on the Auflege- direction, in particular not between a top and bottom of the Chain must be distinguished after regardless of the turning state of the conveyor chain each have the same reliability against unwanted mechanical analysis or decoupling. Another expedient embodiment of the conveyor chain is characterized in that the tab elements each have partially circular openings in their opposite end sections, the wall sections of which are provided as bearing surfaces with respect to circular cross-sections or cylindrical or partially cylindrical lateral surfaces of the pivot pins. As a result, a low-friction or long-term wear-free and reliable articulated bearing between the pivot pin of a coupling element and the lug elements coupled thereto is achieved. In particular, this ensures a long-term functional joint connection between a coupling element and the lug elements coupled thereto articulated.

According to an expedient measure, it is provided that the partially circular apertures of the tab elements pass into free-standing sections, which release sections allow passage of the holding extension of a pivot pin relative to a tab element, so that an articulated coupling and decoupling of the tab element relative to the pivot pin can be performed. The partially circular openings in the tab elements can be made particularly simple and thus relatively inexpensive. The mutually corresponding cropping sections and holding extensions can be used in a simple manner for intermeshing and locking as required between a joint pin or its holding extension and a tab element. In particular, this provides a shape or contour correspondence similar to the key and keyhole principle.

According to an expedient embodiment, it is provided that the pivot pins in conjunction with the holding extensions with respect to an end view on the pivot pin form a cam-shaped or egg-shaped outline contour and the openings in the tab elements have a corresponding or gegengleiche cam-shaped or egg-shaped outline contour. An advantage of such cam-shaped or egg-shaped contour contours on the pivot pin of the coupling elements, in particular with respect to the end faces, is that these contours can be relatively easily manufactured. In particular, such

Contours are also produced in a drop forging method, whereby the corresponding shapes in a simple, process-reliable and cost-effective way and Way can be made. But also in relation to the tab elements with the opposite or correspondingly shaped, cam-shaped or egg-shaped breakthroughs result in production engineering and economic advantages in terms of creating these breakthroughs. In particular, in connection with simple punching processes such breakthroughs can be produced quickly, reliably and with sufficiently high accuracy. In addition, the tensile strength values or stability values of the tab elements can thereby be promoted, since no sharp-angled, the risk of breakage or the notch effect supporting edge profiles or bends are required. Preferably, the free-standing sections in the mutually opposite end sections of the tab sections each point in the direction of the longitudinal center of the tab elements. In this way, a maximum or optimized tensile strength of the tab elements can be accomplished. Above all, in comparison to free-cutting sections extending transversely to the longitudinal center axis of the tab elements, higher tensile or tear-off strengths of the end sections of the tab elements result, in which the partially circular openings are formed.

According to a practicable measure, a longitudinal extension of the partially circular apertures or the release portions is oriented at an angle between 5 ° to 45 °, preferably at an angle of approximately 20 °, particularly preferably at an angle of 22 °, to the longitudinal axis of the tab elements , It is thereby advantageous that the tab elements, which are coupled to a coupling element, can be bent at an acute angle relative to the longitudinal axis of the coupling elements in order to achieve mechanical decoupling between the respective tab element and the coupling element, in particular by an axial distance of the coupling element allow respective tab member from the corresponding pivot pin. As a result, the probability of undesired cancellation of the articulated connection between a tab element and a coupling element can be virtually eliminated or minimized. It is expedient if the coupling elements are formed by forged components, in particular by means of a drop forging method are produced. As a result, on the one hand a high degree of robustness of the coupling elements can be ensured and a cost-effective production can be achieved even for smaller series or average quantities. Is an advantage Furthermore, that thereby a one-piece or integrally executed component can be created, on which in a robust manner, the pivot pins are formed to form the joint axes. In particular, structurally relatively complex bodies or components can be created by forging processes, which nevertheless have a high degree of robustness or strength. In particular, it is thereby not necessary to produce a plurality of individual parts which would have to be assembled or mounted in a separate assembly step for the corresponding coupling element.

According to an expedient embodiment, the tab elements are formed by stamped components from sheet metal, in particular sheet metal. As a result, an optimized ratio between production costs and benefits or strength can be achieved. In particular, such tab elements can be created extremely reliable and at the same time cost. Punching processes make it possible to provide tab elements in large numbers with relatively short cycle times.

According to an advantageous measure, it can be provided that the coupling elements have at least one threaded hole or at least one welded connection zone which is provided for fastening a carrier web or driver profile for conveyed goods to be conveyed. In particular, the conveying behavior of the conveyor chain can be favored with such carriers. In the case of the execution of threaded holes a simple and rapid assembly and disassembly of drivers can be made. The formation of weld joint zones offers the advantage that an extremely robust and cost-effective design of a coupling element can be created. In addition, the required expenditure for the possible attachment of carriers can thereby be kept low. In addition, the pitch or the distance between the carriers can be varied freely or be selected particularly flexible when all coupling elements of the conveyor chain have a weld zone.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

In each case, in a highly simplified, schematic representation: 1 shows an embodiment of a partial section of the conveyor chain in combination with a chain sprocket deflecting the conveyor chain;

FIG. 2 shows a partial section of the conveyor chain according to FIG. 1 in side view and with a partially broken joint zone; FIG.

FIG. 3 shows the conveyor chain according to FIG. 2 in plan view with partially broken joint zones; FIG.

4 shows a partial section of a coupling element and two tab elements coupled thereto in a side view when assuming an angled position between the coupling element and one of the tab elements, which hinge angle position permits a mechanical decoupling of the angled tab element;

FIG. 5 shows the conveyor chain according to FIG. 3, cut along lines V-V in FIG. 3; FIG.

FIG. 6 shows the conveyor chain according to FIG. 3, cut along the lines VI-VI in FIG. 3;

Fig. 7 is a tab element of the conveyor chain in side view.

By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location.

Fig. 1 shows a portion of a conveyor chain 1 in cooperation with a sprocket 2, which can act as a deflecting member and / or as a drive element for the conveyor chain 1. The sprocket 2 is designed as a gear. Alternatively, the sprocket 2 may also be formed by a rotatably mounted deflection pulley, so be carried out toothless. This especially when the conveyor chain 1 in the direction perpendicular to its conveying or supporting plane 3 has a sufficient depression or projections for lateral guidance. Such depressions or lateral projections on the conveyor chain 1 allow the construction of a sufficient positive engagement with the disc-like sprocket 2 in order to avoid undesired sliding of the conveyor chain 1 from the disk-shaped sprocket 2.

Especially when the sprocket 2 is to act as a drive wheel for the conveyor chain 1, this is - as shown schematically - designed as a gear which is in meshing or toothed connection with the conveyor chain 1. The conveyor chain 1 can be provided as a single strand, or can also be arranged in at least two conveyor strands running parallel to one another. From this it is clear that the conveyor chain 1 can be a significant component of a conveyor belt or a conveyor system for piece-like or free-flowing material or conveyed. Such conveyors or conveyor belts are suitable, for example, for conveying wood in pieces, such as logs or lumber, rocks and the like. However, corresponding conveyor belts or conveyor belts are also suitable for conveying free-flowing material, such as gravel, demolition material, grain, cattle feed, silage, fertilizer, compost and the like. Among other things, the high robustness and insensitivity to contamination distinguishes the specified conveyor chain 1.

In the illustrated embodiment, the conveyor chain 1 is deflected by 180 ° and this to the sprocket 2, which can act as a drive, out. Typically, the conveyor chain 1 is self-contained, that is ring-shaped or loop-shaped. In this context, it should be noted that to form a self-contained loop or an endless ring of the conveyor chain 1 no special closure or special parts are required. In particular, the two ends of a claimed conveyor chain 1 can be coupled or connected to one another without the need for special members or special parts. In addition, as a rule, no tools or any special aids are required in order to construct a self-contained conveyor chain 1, as can be clearly seen from the illustration according to FIG.

The conveyor chain 1 comprises a first tensile strand 4 and a second tensile strand 5, which second tensile strand 5 runs parallel and at a predetermined distance from the first tensile strand 4. Among other things, these two tension cords 4, 5 are provided for receiving the respective tensile forces with respect to the conveyor chain 1. The thus parallel acting and parallel tensile cords 4, 5 are therefore among other things for the achievable tensile strength of the conveyor chain

1 determining. A trained between the two tension cords 4, 5, clear distance 6 is co-determining the width of the conveyor chain 1 and the thickness or thickness of the sprocket

2 decisive, especially for the transferable from the sprocket 2 torque or for its lateral stability mitentscheidend. Typically, a width 8 of the conveyor chain 1 measured transversely to the longitudinal direction-double arrow 7-of the conveyor chain 1 may be between 20 mm and 100 mm, typically between 30 mm and 80 mm. Thus, a variety of conveyor technology applications can be covered.

The clear distance 6 between the two tie rods 4, 5 is essentially defined by coupling elements 9 which are arranged between the two pull cords 4, 5 and hold them substantially at a distance 6 from one another, as well as the parallelism between the two pull cords 4, 5 maintained. The first tensile strand 4 comprises a plurality of first lashing elements 10 arranged one behind the other. The second tensile strand 5 comprises a plurality of second lashing elements 11 arranged one behind the other. The individual lashing elements 10 of the first tensile strand 4 and the individual lashing elements 11 of the second pulling strand 5 are in FIG Structurally identical, in particular designed as common parts, and positioned in a uniform grid, ie arranged with respect to the longitudinal direction 7 of the conveyor chain 1 without longitudinal offset.

A coupling element 9 of the conveyor chain 1 defines, in cooperation with an articulated thereto, the closest pair of tab elements 10, 11, which two tab elements 10, 11 originate from the first tensile strand 4 and the second tensile strand 5, the so-called pitch 12 of the conveyor chain 1.

From the illustrations it is clear that by using only two structurally different components or element types, namely from a certain number of coupling elements 9 and from a corresponding number of paired, preferably identically designed tab elements 10, 11 a conveyor chain 1 of basically arbitrary Length can be assembled. In particular, by serially successive, alternating arrangement of a coupling element 9 and a pair of opposite lashing elements 10, 11, the respective desired length of the conveyor chain 1 are assembled, wherein the total length of the conveyor chain is a multiple of the pitch 12. The tab elements 10, 11 are preferably designed strip-shaped or elongated and preferably have rounded longitudinal ends. The tab elements 10, 11 are preferably formed of metal, in particular formed by plate-like metal strips. According to an expedient measure, the tab elements 10, 11 are formed by stamped components, in particular by means of elements punched out of metal sheets.

The first tension cord and the second tension cord 4, 5 each comprise a plurality of tab members 10 and 11, which are arranged next to one another in the longitudinal direction 7 of the conveyor chain. The tab members 10 of the first tension cord 4 and the tongue elements 11 of the second tension cord 5 are in this case arranged serially one behind the other or respectively aligned with the axis, in particular not overlapping. The tab members 10 of the first tension cord 4 and the transversely to the longitudinal direction 7 spaced tab members 11 of the second tension cord 5 are coupled with their present in the same transverse plane longitudinal ends of a common coupling element 9 articulated. In particular, it is provided that immediately successive tab elements 10 of the first tension cord 4 and immediately successive tab members 11 of the second tension cord 5 are each hinged at their longitudinal ends to a common, centrally positioned coupling element 9. With respect to a pair of mutually opposite tab elements 10, 11, in each case such a coupling element 9 is hinged or held at each of the two opposite longitudinal ends of the tab elements 10, 11. Accordingly, by alternating juxtaposition of coupling elements 9 and hinged thereto pairs of tab members 10, 11, the respective desired length of the conveyor chain 1 are assembled or assembled. The coupling elements 9 define a plurality of hinge axes 13, 14 running transversely to the longitudinal direction 7 of the conveyor chain 1 in relation to the pairs of tab elements 10, 11 coupled thereto. It is essential that such a coupling element 9 of the conveyor belt derkette 1 defines a first joint axis 13 and further defines a second joint axis 14, which second joint axis 14 is positioned with respect to the longitudinal direction 7 of the conveyor chain 1 to the first joint axis 13 spaced. The two joint axes 13, 14 are typically arranged at a distance 15 between 15 mm to 80 mm, preferably at a distance of between 20 mm and 40 mm, in order to be able to fulfill typically required stabilities or to meet the widest possible range of applications to be able to. The final distance 15 between the joint axes 13, 14 is determined inter alia by the robustness or tensile strength to be achieved and the desired pitch 12 of the conveyor chain 1. The first articulation axis 13 is provided for articulated coupling with a first pair of parallel-positioned tab elements 10, 11, while the second articulation axis 14 of the coupling element 9 is provided for articulated coupling with a second pair of tab members 10, 11 positioned in parallel. The joint axes 13, 14 of a coupling element 9 are aligned axially parallel to each other, extend transversely to the conveying direction or transversely to the longitudinal direction 7 of the conveyor chain 1 and are arranged within or parallel to the conveying or supporting plane 3 of the conveyor chain 1.

The two joint axes 13, 14 of a coupling element 9 are preferably defined by a paired arrangement of joint pins 16, 16 'and 17, 17'. In particular, the first joint axis 13 is formed by opposing joint journals 16, 16 'that project from the central base body 18. The second joint axis 14 is also defined by the base body 18 each projecting, opposing hinge pin 17, 17 '. Preferably, the base body 18 and the joint pins 16, 16 'and 17, 17' formed thereon form a one-part component. This one-piece, ie, decomposable only by cutting separation or only by mechanical action component is preferably made in a forging process, in particular formed by a drop forging. The central body 18 of the coupling element 9 may be executed block-like, as shown in Fig. 1. This main body 18 can be understood as a common support body for the joint pin 16, 16 'projecting therefrom for forming the first joint axis 13, and also as a support body for the joint pin 17, 17' projecting therefrom for forming the second joint axis 14. It is possible to perform the coupling element 9 block-like or rib-like, to provide with openings, or run, for example, annular or X-shaped. Likewise, a substantially Shaped basic contour or outline contour for the coupling element 9 or for the base body 18 conceivable. Accordingly, it is provided that a coupling element 9 via its two joint axes 13, 14 with a total of four spaced-apart tab elements 10, 11 coupled or can be hingedly connected.

The conveyor chain 1 can be dismantled or extended and shortened without the need for tools or without the need for special aids. In particular, the respective desired length or overall length of the conveyor chain 1 can be made completely without tools by simple positive coupling of coupling elements 9 with a corresponding number of tab elements 10, 11 for maintenance work or for adaptation work. In addition, no welding or riveting operations and no glands are required to achieve a durable or long-term mechanical connection between the coupling elements 9 and the tab members 10, 11 to achieve. On the contrary, technical measures are implemented in order to be able to accomplish a tool-free executable, form-fitting coupling and decoupling between the tab elements 10, 11 and the coupling elements 9 of the conveyor chain 1. For this purpose, at the first hinge axis 13 and at the second joint axis 14 of the coupling elements 9 axially acting holding means 19, 19 'and 20, 20' is formed. These holding means 19, 19 'and 20, 20' are respectively formed on the four pivot pins 16, 16 'and 17, 17', in particular on the side facing away from the base 18 end faces of the pivot pins 16, 16 'and 17, 17' educated. These holding means 19, 19 'and 20, 20' represent axially acting Abgleitsicherungen for the tab members 10, 11, which prevent undesirable sliding of the tab members 10, 11 of the pivot pins 16, 16 'and 17, 17'. The holding means 19, 19 'and 20, 20' thus limit a maximum possible, axial displacement of the tab elements 10, 11 with respect to the common or coupling coupling element 9 or against the respective pivot pin 16, 16 'or 17, 17', if the tab elements 10, 11 and the coupling element 9 corresponding therewith are in the typical position of use or use, as can be seen in FIGS. 1 to 3. In contrast, in a second state, in particular in a maintenance state of the conveyor chain 1 or the individual Koppelemente 9 and tab elements 10, 11 allows mechanical decoupling, in particular a repeal of the mechanical positive connection between any coupling element 9 and the or it is coupled tab elements 10, 11 allows. Accordingly, a form-fitting or limiting acting holding means 19, 19 'and 20, 20' deactivatable or surmountable when a predetermined joint angle position 21 - Fig. 4 - between the respective coupling element 9 and a lug element coupled thereto 10 and 11 respectively is taken. When taking this at least one predefined or structurally predetermined joint angle position 21 between a coupling element 9 and a lug element 10, coupled thereto, the parts mentioned are mechanically separable from one another. In particular, when taking this joint angle position 21, a removal of the tab elements 10, 11 of the respective joint axes 13, 14 and of the respective pivot pins 16, 16 'and 17, 17' are made without tools or special tools are required. Thus, the axially acting slipping or slip-off between the tab members 10, 11 and the coupling element 9 can be disabled or canceled by taking the at least one predetermined joint angle position 21, as best seen in a synopsis of Figs. 2 and 4 , Accordingly, those tab members 10, 11, which are angled in accordance with the predetermined joint angle position 21 relative to the next associated coupling element 9, mechanically decoupled from the coupling element 9 and deducted from the joint axes 13 and 14 in the axial direction. The at least one predetermined joint angle position 21 refers to the longitudinal axes of the tab elements 10, 11 and the coupling element 9 reference, which longitudinal axes each parallel or achsfluchtend to the longitudinal direction 7 of the conveyor chain 1 when the conveyor chain 1 in the in Fig. 2 , 3 shown, stretched or rectilinear use position or position is present.

The joint angle position 21 is preferably defined as an acute angle, in particular by an angle less than 90 °, preferably defined by an angle between 40 to 85 °, more preferably by a joint angle position 21 of about 68 °. As a result, unintentional or unintentional decoupling between a coupling element 9 and a tab element 10 or 11 connected thereto in a form-fitting manner can be reliably prevented and also a high degree of robustness or tensile strength of the conveyor chain 1 can be achieved. In particular, one end of a tab element 10 or 11 is articulated on each of the pivot pins 16, 16 'and 17, 17' and secured against axial sliding when the coupling element 9 and the respective tab element 10, 11 in Winkelstellun- gene outside the predefined joint angle position 21 are aligned with each other. In particular, when the conveyor chain 1 or its coupling members 9 and tab members 10, 11 are present in their elongated or at least approximately paraxial or aligned position, which position corresponds to the typical use or use position of the conveyor chain 1, is a decomposition of Conveyor chain 1 due to active Begrenzungsbzw. Holding means 19, 19 'and 20, 20' with respect to the tab elements 10, 11 prevented.

The depending on the angle position or joint angle position 21 between the coupling element 9 and the tab elements 10, 11 can be activated and deactivated holding means 19, 19 'and 20, 20' are suitably formed by holding projections 22, 22 'and 23, 23' , which holding projections 22, 22 'and 23, 23' are provided as axial Abgleitsicherungen against the respective pivot pin 16, 16 'and 17, 17' hinged tab member 10 and 11 respectively. The holding projections 22, 22 'and 23, 23' at the ends facing away from the base 18 of the pivot pins 16, 16 'and 17, 17' can in the form of retaining lugs or other projections relative to the pivot pins 16, 16 'and 17, 17 'executed. In particular, these holding projections 22, 22 'and 23, 23' protrude from the respective lateral surfaces of the at least partially cylindrical or completely cylindrical pivot pins 16, 16 'and 17, 17' in the radial direction and thus provide a respective projection or stop finger for the respective end portions of the tab members 10, 11 is.

According to an expedient embodiment, only one single retaining extension 22, 22 'and 23, 23' extending radially to the respective joint axis 13, 14 is formed on the cantilevered ends of the joint journals 16, 16 'and 17, 17'. 2 and 3, the holding extensions 22, 22 'on the first articulation axis 13 extend in a first radial direction, while the holding extensions 23, 23' extend on the front ends of the further articulation stems 17 , 17 'extend in a second radial direction different from the first direction. It is expedient if the first holding projections 22, 22 'are aligned perpendicular to the conveying or supporting plane 3, for example pointing downwards, while the two further holding extensions 23, 23' on the second articulated axis 14 run in the opposite direction, in particular upwards, as is best seen in FIGS. 1, 2. Thus, the first pair of support extensions 22, 22 'are perpendicular or approximately perpendicular to one of the first and second articulations. axis 13, 14 connecting plane, in particular down, while the distance to the longitudinal 7 spaced, closest pair of holding projections 23, 23 'in the opposite direction thereto, in particular facing upward. As further best seen in FIGS. 2, 3, the end faces of the pivot pins 16, 16 'and 17, 17' in combination with the holding extensions 22, 22 'and 23, 23' in an end view of the pivot pins 16, 16 'and 17, 17' each have a cam-shaped or egg-shaped outline contour. That is, the side holding projections 22, 22 'and 23, 23' seen in side view have a partially circular outline contour and then pass into the respective retaining lug or in a radial projection. Instead of cam-shaped or egg-shaped outline contours, it is also possible to form the holding extensions 22, 22 'and 23, 23' in a side view quadrangular, triangular or even pin-like or finger-like. It is advantageous if the holding projections 22, 22 'and 23, 23' protrude in one direction only, ie unidirectionally or on one side from the respective pivot pins 16, 16 'or 17, 17'.

The tab elements 10, 11 have at their opposite end portions respectively recesses or openings 24, 24 'and 25, 25', which in comparison with the frontal contour of the pivot pins 16, 16 'and 17, 17' opposite or have corresponding outline contour. According to an advantageous embodiment, as shown in the figures, the tab elements 10, 11 in their opposite end portions each have partially circular openings 24, 24 'and 25, 25', whose wall sections 26, 26 'and 27, 27 'as bearing or sliding surfaces with respect to circular cross-sectional areas, in particular with respect to cylindrical or partially cylindrical formed lateral surfaces of the pivot pins 16, 16' and 17, 17 'are provided. According to the example, the openings 24, 24 'and 25, 25' in normal view on the flat sides of the strip or plate-shaped tab elements 10, 11 also cam-shaped or egg-shaped outline contours. This creates a positive fit similar to a combination of key and keyhole.

It is expedient that the partially circular apertures 24, 24 'or 25, 25', which are respectively arranged in the end portions of the tab elements 10, 11, in exemption pass sections 28, 28 'and 29, 29', which exemption sections a feedthrough of the holding extension 22, 22 'and 23, 23' of the respective pivot pin 16, 16 'and 17, 17' relative to the respectively associated tab element 10, eleventh allow, so that an articulated coupling and decoupling of the tab member 10 and 11 relative to the respective pivot pin 16, 16 'and 17, 17' is executable.

As best seen in Figs. 2, 3 and 7, these cut-free portions 28 and 28 'and 29 and 29' of a tab member 10 and 11 respectively point toward the longitudinal center of the tab members 10 and 11, respectively the cam-shaped or egg-shaped apertures 24, 24 'or 25, 25' in the direction of the longitudinal center or show these points substantially to one another. A longitudinal extent of the partially circular, for example cam or egg-shaped openings 24, 24 'and 25, 25' is at an angle between 5 ° to 45 °, preferably at an angle of about 20 °, particularly preferably at an angle of 22 ° to the longitudinal axis or central axis of the tab elements 10, 11 aligned.

The holding means 19, 19 ', 20, 20' on a coupling element 9 can thus ver in cooperation with the apertures 24, 24 ', 25, 25' on a pair of tab members 10, 11 as a positive-acting, if necessary, activatable and deactivatable coupling devices ver - become.

As best seen in Fig. 5 it can be seen, at least individual coupling elements 9 of the conveyor chain 1 at least one breakthrough or at least one threaded bore 30 which is provided for releasably securing or screwing with a Mit- carrier web or Mitnehmerprofil for conveying conveyed as needed. Alternatively or in combination, it can be provided that at least individual coupling elements 9 of the conveyor chain 1 define a weld connection zone 31, for example, relatively flat depressions or elevations, which are provided for producing a welded connection with respect to a Mitnehmersteg or Mitnehmerprofil for conveying conveyed, as this Best seen in Fig. 6 can be seen. The embodiment shows a possible embodiment variant, wherein it should be noted at this point that the invention is not limited to the specifically illustrated embodiment, but rather also various variations of the individual design features are possible and this possibility of variation due to the teaching of technical action by objective invention in the knowledge of the person working in this technical field.

The scope of protection is determined by the claims. However, the description and drawings are to be considered to interpret the claims. Individual features or combinations of features from the embodiment shown and described may represent for themselves inventive solutions. The task underlying the independent inventive solutions can be taken from the description.

All statements of value ranges in the present description should be understood to include any and all sub-ranges thereof, e.g. is the statement 1 to 10 to be understood that all sub-areas, starting from the lower limit 1 and the upper limit 10 are included, ie. all sub-areas begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8, 1, or 5.5 to 10.

For the sake of order, it should finally be pointed out that for a better understanding of the construction, elements have been shown partially unevenly and / or enlarged and / or reduced in size.

REFERENCE NUMBERS

1 conveyor chain

 2 sprocket

 3 conveyor or carrying level

 4 tensile strand

 5 cord

 6 distance

 7 longitudinal direction

 8 width

 9 coupling element

 10 tab element

 11 tab element

 12 pitch

 13 joint axis

 14 joint axis

 15 distance

, 16 'pivot pin

, 17 'pivot pin

 18 basic body

, 19 'holding means

, 20 'holding means

 21 joints wi nkel position

, 22 'holding process

, 23 'holding process

'24' breakthrough

'25' breakthrough

, 26 'wall section

, 27 'wall section

, 28 'exemption section

, 29 'Exemption Section

 30 tapped hole

Claims

Patent claims 1. conveyor chain (1) for conveying piece-like or pourable material, comprising a first tensile strand (4) and a second tensile strand (5), which tensile cords (4, 5) parallel to each other and transverse to the longitudinal direction (7) of the conveyor chain (1 ), wherein the first tensile strand (4) and the second tensile strand (5) each comprise a plurality of tab elements (10, 11) arranged next to each other in the longitudinal direction of the conveyor chain (1), and wherein directly successive tongue elements (10) of the first pull string (4) and immediately successive tab members (11) of the second pull string (5) are pivotally connected by means of interposed coupling elements (9), so that a plurality of joints between serially successive pairs of. By a plurality of coupling elements (9) Laschenelementen (10, 11) of the first and second pull cord (4, 5) are formed, characterized in that the coupling elements (9) each have a first joint axis (13) and a second joint axis (14) or define that the first and the second joint axis (13, 14) on each of the coupling elements (9) in the longitudinal direction of the conveyor chain (1) spaced apart wherein the first hinge axis (13) is for pivotal coupling with a first pair of tab members (10, 11) and the second hinge axis (14) is for articulated coupling with a second, serially adjacent pair of tab members (10, 11) is that and on the first and second hinge axis (13, 14) of the coupling elements (9) axially acting holding means (19, 19 ', 20, 20') for the tab members (10, 11) are formed, wherein such retaining means ( 19, 19 ', 20, 20') can be deactivated or overcome by assuming at least one predetermined joint angle position (21) between a coupling element (9) and a tab element (10, 11) coupled thereto, so that a tab element (10 , 1 1), which is angled relative to the coupling element (9) with the corresponding predetermined joint angle position (21), is mechanically decoupled or removable from the coupling element (9). 2. Conveyor chain according to claim 1, characterized in that the coupling elements (9) each have a base body (18) with four each of which projecting hinge pin (16, 16 ', 17, 17'), wherein a first pair of opposed pivot pins (16, 16 ') define the first hinge axis (13) and a second pair of opposed hinge pins (17, 17') define the second hinge axis (14 ) Are defined. 3. conveyor chain according to claim 1 or 2, characterized in that the first and the second hinge axis (13, 14) parallel to each other. 4. conveyor chain according to claim 2 or 3, characterized in that the pivot pins (16, 16 ', 17, 17') on the base body (18) are integrally formed so that integrally formed coupling elements (9) are formed. 5. conveyor chain according to at least one of claims 2 to 4, characterized in that on each of the hinge pin (16, 16 ', 17, 17') of a coupling element (9) each one end portion of a tab member (10, 11) articulated is. 6. conveyor chain according to at least one of claims 2 to 5, characterized in that the holding means (19, 19 ', 20, 20') by at the free-projecting ends of the pivot pins (16, 16 ', 17, 17') formed , in each case radially to the respective joint axis (13, 14) extending retaining extensions (22, 22 ', 23, 23') are formed, which holding projections (22, 22 ', 23, 23') as axial Abgleitsicherungen compared to the respective pivot pin (16, 16 ', 17, 17') hinged tab member (10, 11) are provided. 7. conveyor chain according to claim 6, characterized in that at the free-projecting ends of the pivot pin (16, 16 ', 17, 17') in each case only a single, radially to the respective joint axis (13, 14) extending retaining extension (22, 22 ', 23, 23 ') is formed, wherein the holding extensions (22, 22') on the hinge pin (16, 16 ') of the first hinge axis (13) in a first radial direction and the holding extensions (23, 23') on the pivot pin (17, 17 ') of the second articulation axis (14) extend in a second radial direction. 8. conveyor chain according to claim 6 or 7, characterized in that the holding extensions (22, 22 ', 23, 23') perpendicular or approximately perpendicular to a first and second hinge axis (13, 14) connecting plane. 9. conveyor chain according to at least one of claims 2 to 8, characterized in that the tab elements (10, 11) in their opposite Endab- each have partially circular openings (24, 24 ', 25, 25'), whose wall sections (26, 26 ', 27, 27') as support or bearing surfaces against cylindrical or partially cylindrical lateral surfaces of the pivot pin (16, 16 ', 17 , 17 ') are provided. 10. conveyor chain according to claim 9, characterized in that the partially circular openings (24, 24 ', 25, 25') of the tab elements (10, 11) in exemption sections (28, 28 ', 29, 29') merge, which exemption sections (28, 28 ', 29, 29') allow passage of the holding extension (22, 22 ', 23, 23') of a pivot pin (16, 16 ', 17, 17') relative to a tab member (10, 11), so that an articulated coupling and decoupling of the tab element (10, 11) relative to the pivot pin (16, 16 ', 17, 17') is executable. 11. conveyor chain according to at least one of claims 2 to 10, characterized in that the hinge pin (16, 16 ', 17, 17') and the holding projections (22, 22 ', 23, 23') in an end view of the pivot pin (16 , 16 ', 17, 17') form a cam-shaped or egg-shaped outline contour, and the apertures (24, 24 ', 25, 25') in the tab elements (10, 11) have a cam-shaped or egg-shaped outline contour corresponding thereto. 12. conveyor chain according to claim 10 or 11, characterized in that the free-standing sections (28, 28 ', 29, 29') in the opposite end portions of Tab members (10, 11) respectively in the direction of the longitudinal center of the tab members (10, 11) show. 13. conveyor chain according to at least one of claims 9 to 12, characterized in that a longitudinal extent of the partially circular openings (24, 24 ', 25, 25') or the exemption sections (28, 28 ', 29, 29') in an angle between 5 ° to 45 °, preferably at an angle of about 20 ° to the longitudinal axis of the tab members (10, 11) is aligned. 14. conveyor chain according to at least one of the preceding claims, characterized indicates that the coupling elements (9) are formed by forged components. 15. conveyor chain according to at least one of the preceding claims, characterized in that the tab elements (10, 11) are formed by stamped from sheet metal components. 16. conveyor chain according to at least one of the preceding claims, characterized in that the coupling elements (9) at least one threaded bore (30) or at least one welding connection zone (31), which is provided for attachment of a Mitnehmersteges or Mitnehmerprofils for conveying conveyed.