WO1990008082A1 - Installation for monitoring conveying belts - Google Patents

Installation for monitoring conveying belts Download PDF

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Publication number
WO1990008082A1
WO1990008082A1 PCT/EP1990/000015 EP9000015W WO9008082A1 WO 1990008082 A1 WO1990008082 A1 WO 1990008082A1 EP 9000015 W EP9000015 W EP 9000015W WO 9008082 A1 WO9008082 A1 WO 9008082A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
garlands
support roller
conveyor belt
loading station
Prior art date
Application number
PCT/EP1990/000015
Other languages
German (de)
French (fr)
Inventor
Orenstein & Koppel Ag O&K
Dietmar Gawlok
Ian Thomson
Original Assignee
Orenstein & Koppel Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Orenstein & Koppel Ag filed Critical Orenstein & Koppel Ag
Publication of WO1990008082A1 publication Critical patent/WO1990008082A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors 
    • B65G39/10—Arrangements of rollers
    • B65G39/12—Arrangements of rollers mounted on framework
    • B65G39/16—Arrangements of rollers mounted on framework for aligning belts or chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
    • B65G43/02—Control devices, e.g. for safety, warning or fault-correcting detecting dangerous physical condition of load carriers, e.g. for interrupting the drive in the event of overheating

Definitions

  • the invention relates to a device for, in particular, electro-mechanical monitoring of conveyor belts in the area of feed stations, which are formed at least from a plurality of supporting roller garlands articulated on associated stationary carriers for receiving the upper run of a conveyor belt, one with the carriers below the supporting roller garlands or the loading station is arranged elastically connected and provided with a warning device.
  • a slit monitoring device for conveyor belts at a feed station is known, at which the upper run of the conveyor belt is supported and guided by means of pendulums on the supporting structure of the feed device of suspended garland roller sets, a switching device for Switching off the belt drive is provided if an object pierces the belt.
  • the slit monitoring device has a frame attached below the garland roller sets and connected to the switching device, which extends over the length of the feed device, is movably mounted in the longitudinal direction of the belt on the support structure of the feed device, and has stop strips which are between the individual gir ⁇ grab landing roller sets.
  • the frame is provided in a complex manner with vertically arranged stop bars which have a corresponding recess in the area of the respective contact surface with the support rollers.
  • the recess is selected so that, in addition to the central support roller, the subsequent two inclined support rollers, which are arranged at an incline, are acted upon when the frame is displaced.
  • a switch finger is provided on the frame, which, when shifted accordingly, actuates a switch-off device which switches the Conveyor belt drive switches off.
  • a switch-off device which switches the Conveyor belt drive switches off.
  • the invention is based on the object of further developing a device mentioned in the generic part of the first claim in such a way that damage to both the frame and the idler roller garlands is largely avoided, the structural design, in particular the mechanical part of the monitoring device, being simplified .
  • the frame has at least such a width that the substantially horizontally arranged central support rollers of each support roller garland protrude at least partially into the space formed between the longitudinal webs of the frame and that on both sides of the central support rollers of each support roller garland Connecting elements are provided which, on the one hand, connect the central support rollers of all the support roller garlands to one another and, on the other hand, their free ends are fastened outside the support roller garlands to the end profiles of the frame which run transversely to the longitudinal webs.
  • the idler roller garlands By fixing the idler roller garlands within the frame, a structural unit that is elastically adjustable with respect to the carrier or the loading station is created, at which, in the event of an object striking through the conveyor belt, the frame is taken along in connection with the supporting roller garlands, as a result of which damage to the girls is largely prevented.
  • the design of the spring force is to be selected as a function of the respective conveying speed, so that the frame connected to the supporting roller garlands cannot be deflected too much. Only when a specified travel range is exceeded is a signal given by a limit switch and the conveyor belt switches off automatically.
  • This limit switch is preferably formed by a two-part inductive switch which reacts to the change in the magnetic force.
  • the springs arranged between the frame and the carrier ensure that the system is not switched off unintentionally by slight pendulum movements, which are almost always present in this area.
  • Figure 1 Material feed station with a combined monitoring device in the side view
  • Figure 2 vertical section through the bunker of the material feed station and the fixed support frame for receiving the idler garlands according to the line A-A
  • Figure 3 vertical section through the bunker of the material feed station in connection with the oscillating suspension of the monitoring device according to the line B-B
  • the invention is shown in FIGS. 1 to 6 on the basis of a side view and various sectional views.
  • the material feed station 1 is formed by a bunker 2, which is formed from two inclined side walls 3, 4 and two end walls 5, 6.
  • the walls 3-6 of the bundle 2 are connected with feet 7, 8 arranged in a stationary manner, which can optionally be connected to further components.
  • On the walls 3, 4 of the bunker 2, as seen in the longitudinal direction of the bunker 2, a plurality of fixed supports 9, 10 are arranged in pairs opposite one another.
  • Each * pair of carriers 9, 10 is used to displace a supporting roller garland 11, which is formed from at least three individual supporting rollers 12, 13, 14.
  • the end regions 15, 16 of each idler garland 11 are detachably and possibly adjustably connected, for example by screwing to the carriers 9, 10.
  • each support roller garland 11 protrude the free space 28 of the frame 24 into it.
  • the central support rollers 13 of each support roller garland 11 are connected to one another in the region of their free ends 29, 30 via connecting elements 31, 32, for example in the form of chains.
  • the free ends 33, 34, 35 and 36 of the connecting elements 31, 32 are fastened in the region of the front end profiles. This measure creates a structural unit between the frame 24 and the support rollers 13.
  • FIG. 7 shows the subject matter of the invention according to independent claim 2. Shown is a frame 42 $ which is composed of two side members 43, 44 and two cross members 45, 46, which have a U-Prof design "Open between the side members 43, 44" in cross section there are a large number of further carriers 47 which serve for the stationary reception of the support rollers 48, 49, 50.
  • FIGS 8 and 9 show vertical sections through the bunker 59 at different locations.
  • plate-shaped securing elements 63 extending at least partially into the carriers 51, 52 of the feed device 59 are provided on the longitudinal carrier 44.
  • the lower leg 64 of the longitudinal beams 44 rests on a rotatable support roller 65 and rolls when the frame 42 and the relative movement Feeder 59 on this.
  • the frame is supported on the carrier 51, 52 via the securing elements 63.
  • FIG. 10 shows an enlarged view of the monitoring device 66, which is designed analogously to the sensor device 40, 41 according to FIG. 1. Furthermore, the longitudinal beam 44, the eye 56, the beam 54 and the
  • Spring 58 is designed as a compression spring and is biased by a screw 67.
  • the functioning of this monitoring device is identical to that according to FIGS. 1 to 6.
  • the monitoring device 66 is of an inductive type and reacts to changes in the magnetic field. If the frame 42 is deflected too strongly in relation to the feed device (not shown further), the conveyor belt drive is switched off.

Abstract

Installation, en particlier pour la surveillance électromécanique de bandes transporteuses de stations d'alimentation, dans laquelle un cadre (24) à suspension oscillante est relié au moins avec les rouleaux porteurs (13) généralement horizontaux de chaque guirlande de rouleaux porteurs (11, 48, 50). Le cadre (24) est suspendu de manière oscillante par rapport à la station d'alimentation (1) et monté sur ressorts, ce qui neutralise les faibles mouvements oscillatoires en mode opérationnel. La partie électrique de l'installation de surveillance consiste en un détecteur (40, 41) qui émet un signal et coupe l'entraînement de la bande transporteuse lorsque le trajet produit par l'excursion du cadre (24) par rapport à la station d'alimentation (1) dépasse une valeur prédéterminée.Installation, in particular for the electromechanical monitoring of conveyor belts of supply stations, in which a frame (24) with oscillating suspension is connected at least with the generally horizontal carrying rollers (13) of each chain of carrying rollers (11, 48 , 50). The frame (24) is suspended in an oscillating manner relative to the supply station (1) and mounted on springs, which neutralizes the weak oscillatory movements in operational mode. The electrical part of the monitoring installation consists of a detector (40, 41) which emits a signal and cuts off the drive of the conveyor belt when the path produced by the excursion of the frame (24) relative to the station of supply (1) exceeds a predetermined value.

Description

Einrichtung zur Überwachung von Förderbändern Device for monitoring conveyor belts
Die Erfindung betrifft eine Einrichtung zur insbesondere elek- tro-mechanischen Überwachung von Förderbändern im Bereich von Aufgabestationen, die zumindest aus mehreren, an zugehörigen stationären Trägern angelenkten Tragrollengirlanden zur Auf¬ nahme des Obertrums eines Fördergurtes gebildet sind, wobei unterhalb der Tragrollengirlanden ein mit den Trägern bzw. der Aufgabestation elastisch verbundener und mit einer Warneinrichtung versehener Rahmen angeordnet ist.The invention relates to a device for, in particular, electro-mechanical monitoring of conveyor belts in the area of feed stations, which are formed at least from a plurality of supporting roller garlands articulated on associated stationary carriers for receiving the upper run of a conveyor belt, one with the carriers below the supporting roller garlands or the loading station is arranged elastically connected and provided with a warning device.
Durch die DE-PS 24 53 294 ist eine Aufschlitzüberwachungsvor- richtung für Förderbänder an einer Aufgabestation bekannt, an der das Obertrum des Förderbandes mittels Pendeln an der Trag¬ konstruktion der Aufgabevorrichtung aufgehängter Girlandenrol¬ lensätze abgestützt und geführt ist, wobei eine Schalteinrich¬ tung zum Abschalten des Bandantriebes vorgesehen ist, sofern ein Gegenstand das Band durchstößt. Die Aufschlitzüberwachungs- einrichtung weist einen mit der Schaltvorrichtung verbundenen unterhalb der Girlandenrollensätze angebrachten Rahmen auf, der sich über die Länge der Aufgabevorrichtung erstreckt, an der Tragkonstruktion der Aufgabevorrichtung gegenüber den Girlan¬ denrollensätzen in Bandlängsrichtung beweglich gelagert ist und Anschlagleisten aufweist, die zwischen die einzelnen Gir¬ landenrollensätze greifen. Die Nachteile einer solchen Über¬ wachungseinrichtung sind im wesentlichen darin zu sehen, daß der Rahmen in aufwendiger Weise mit vertikal angeordneten Anschlagleisten versehen ist, die im Bereich der jewei¬ ligen Berührungsfläche mit den Tragrollen eine entsprechende Ausnehmung aufweisen. Die Ausnehmung ist hierbei so ge¬ wählt, daß neben der mittleren Tragrolle auch die darauf¬ folgenden geneigt angeordneten beiden seitlichen Tragrollen bei einer Verschiebung des Rahmens beaufschlagt werden. Am Rahmen ist ein Schaltfinger vorgesehen, der bei entsprechen¬ der Verschiebung eine Abschaltvorrichtung betätigt, die den Förderbandantrieb abschaltet. In Abhängigkeit von der Förder¬ geschwindigkeit kann es nun passieren, daß ein durch das För¬ derband durchgeschlagener Gegenstand eine schlagartige Aus¬ lenkung des Rahmens bewirkt, bei welchem die .Anschlagleisten ebenfalls schlagartig an sämtlichen Tragrollengirlanden zur Anlage kommen. Hier ist nicht auszuschließen, daß an den Anschlagleisten und/oder den Tragrollengirlanden Beschädi¬ gungen auftreten können, da es einige Sekunden benötigt, bis die Notabschaltung das Förderband stillgesetzt hat.From DE-PS 24 53 294 a slit monitoring device for conveyor belts at a feed station is known, at which the upper run of the conveyor belt is supported and guided by means of pendulums on the supporting structure of the feed device of suspended garland roller sets, a switching device for Switching off the belt drive is provided if an object pierces the belt. The slit monitoring device has a frame attached below the garland roller sets and connected to the switching device, which extends over the length of the feed device, is movably mounted in the longitudinal direction of the belt on the support structure of the feed device, and has stop strips which are between the individual gir ¬ grab landing roller sets. The disadvantages of such a monitoring device are essentially to be seen in the fact that the frame is provided in a complex manner with vertically arranged stop bars which have a corresponding recess in the area of the respective contact surface with the support rollers. The recess is selected so that, in addition to the central support roller, the subsequent two inclined support rollers, which are arranged at an incline, are acted upon when the frame is displaced. A switch finger is provided on the frame, which, when shifted accordingly, actuates a switch-off device which switches the Conveyor belt drive switches off. Depending on the conveying speed, it can happen that an object penetrated by the conveyor belt causes an abrupt deflection of the frame, in which the stop bars also abut abruptly on all idler garlands. It cannot be ruled out here that damage may occur to the stop bars and / or the idler roller garlands, since it takes a few seconds for the emergency stop to stop the conveyor belt.
Ausgehend von diesem St.d.T. liegt der Erfindung die Auf¬ gabe zugrunde, eine im gattungsbildenden Teil des ersten Patentanspruches angesprochene Einrichtung dahingehend wei¬ terzubilden, daß Beschädigungen sowohl am Rahmen als auch an den Tragrollengirlanden weitestgehend vermieden werden, wobei der konstruktive Aufbau insbesondere des mechanischen Teiles der Überwachungseinrichtung vereinfacht werden soll.Starting from this St.d.T. the invention is based on the object of further developing a device mentioned in the generic part of the first claim in such a way that damage to both the frame and the idler roller garlands is largely avoided, the structural design, in particular the mechanical part of the monitoring device, being simplified .
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Rahmen zumindest eine solche Breite hat, daß die im wesent¬ lichen horizontal angeordneten mittleren Tragrollen einer jeden Tragrollengirlande in den zwischen den Längsstegen des Rahmens gebildeten Freiraum zumindest teilweise hineinragen und daß beiderseits der mittleren Tragrollen einer jeden Tragrollengirlande Verbindungselemente vorgesehen sind, die einerseits die mittleren Tragrollen sämtlicher Tragrollen¬ girlanden miteinander verbinden und deren freie Enden ande¬ rerseits außerhalb der Tragrollengirlanden an den quer zu den Längsstegen verlaufenden Ξndprofilen des Rahmens be¬ festigt sind.This object is achieved in that the frame has at least such a width that the substantially horizontally arranged central support rollers of each support roller garland protrude at least partially into the space formed between the longitudinal webs of the frame and that on both sides of the central support rollers of each support roller garland Connecting elements are provided which, on the one hand, connect the central support rollers of all the support roller garlands to one another and, on the other hand, their free ends are fastened outside the support roller garlands to the end profiles of the frame which run transversely to the longitudinal webs.
Vorteilhafte Weiterbildungen des Erfindungsgegenstandes sind den ün eransprüchen zu entnehmen.Advantageous further developments of the subject matter of the invention can be found in the claims.
Durch die Fixierung der Tragrollengirlanden innerhalb des Rah¬ mens wird hier eine gegenüber dem Träger bzw. der Aufgabesta¬ tion elastisch verstellbare bauliche Einheit geschaffen, bei der im Falle des Durchschlagens eines Gegenstandes durch das Förderband der Rahmen in Verbindung mit den Tragrollengir¬ landen mitgenommen wird, wodurch Beschädigungen an den Girlan¬ den weitestgehend unterbunden werden. Die Auslegung der Feder¬ kraft ist hierbei in Abhängigkeit von der jeweiligen Förderge¬ schwindigkeit zu wählen, damit keine allzu große Auslenkung des mit den Tragrollengirlanden verbundenen Rahmens erfolgen kann. Erst bei überschreiten eines vorgegebenen Wegbereiches wird durch einen Endschalter ein Signal gegeben und das Förderband schaltet automatisch ab. Dieser Endschalter ist vorzugs¬ weise durch einen zweiteiligen Induktivschalter gebildet, der auf die Veränderung der Magnetkraft reagiert. Die zwischen Rahmen und Träger angeordneten Federn bewirken, daß die Anlage nicht durch geringfügige Pendelbewegungen, die nahezu immer in diesem Bereich gegeben sind, ungewollt abgeschaltet wird.By fixing the idler roller garlands within the frame, a structural unit that is elastically adjustable with respect to the carrier or the loading station is created, at which, in the event of an object striking through the conveyor belt, the frame is taken along in connection with the supporting roller garlands, as a result of which damage to the girls is largely prevented. The design of the spring force is to be selected as a function of the respective conveying speed, so that the frame connected to the supporting roller garlands cannot be deflected too much. Only when a specified travel range is exceeded is a signal given by a limit switch and the conveyor belt switches off automatically. This limit switch is preferably formed by a two-part inductive switch which reacts to the change in the magnetic force. The springs arranged between the frame and the carrier ensure that the system is not switched off unintentionally by slight pendulum movements, which are almost always present in this area.
Die Erfindung ist anhand eines Ausführungsbeispieles in der Zeichnung dargestellt und wird wie folgt beschrieben. Es zeigen:The invention is illustrated in the drawing using an exemplary embodiment and is described as follows. Show it:
Figur 1 - Materialaufgabestation mit kombinierter Überwachungseinrichtung in der Seiten¬ ansichtFigure 1 - Material feed station with a combined monitoring device in the side view
Figur 2 - vertikaler Schnitt durch den Bunker der Materialaufgabestation sowie dem fest¬ stehenden Trägergestell zu Aufnahme der Tragrollengirlanden gemäß der Linie A-AFigure 2 - vertical section through the bunker of the material feed station and the fixed support frame for receiving the idler garlands according to the line A-A
Figur 3 - vertikaler Schnitt durch den Bunker der Materialaufgabestation in Verbindung mit der pendelnden Aufhängung der Überwachungs¬ einrichtung gemäß der Linie B-BFigure 3 - vertical section through the bunker of the material feed station in connection with the oscillating suspension of the monitoring device according to the line B-B
Figur 4 - vertikaler Schnitt vor dem „Bunker derFigure 4 - vertical section in front of the "bunker of the
Materialaufgabestation gemäß der Linie C-C Figur 5 - horizontaler Schnitt durch die die mittleren Tragrollen aufnehmende Über¬ wachungseinrichtung gemäß der Linie D-DMaterial feed station according to the CC line Figure 5 - horizontal section through the monitoring device receiving the middle idlers according to the line DD
Figur 6 - Schnitt durch Figur 5 gemäß Linie E-EFigure 6 - section through Figure 5 along line E-E
Die Erfindung ist in den Figuren 1 bis 6 anhand einer Sei¬ tenansicht sowie verschiedener Schnittdarstellungen darge¬ stellt. Die Materialaufgabestation 1 wird durch einen Bunker 2 gebildet, der aus zwei geneigt verlaufenden Seitenwänden 3,4 sowie zwei stirnseitigen Wänden 5,6 gebildet ist. Die Wände 3-6 des Bunders 2 sind mit stationär angeordneten Füßen 7,8 verbunden, die ggf. mit weiteren Bauteilen verbindbar sind. An den Wänden 3,4 des Bunkers 2 sind, in Längsrichtung des Bunkers 2 gesehen, mehrere feststehende Träger 9,10 paarweise gegenüberliegend angeordnet. Jedes*Trägerpaar 9,10 dient zur Verlagerung jeweils einer Tragrollengirlande 11, die jeweils aus mindestens drei einzelnen Tragrollen 12,13,14 gebildet ist. Die Endbereiche 15,16 einer jeden Tragrollengirlande 11 werden beispielsweise durch Verschrauben mit den Trägern 9,10 lösbar und ggf. einstellbar verbunden. Im Bereich der geneigt angeord¬ neten Bunkerwände 3,4 sind weitere Träger 17,18 befestigt, die in Ösen 19 auslaufen. Unterhalb der Tragrollengirlanden 11 ist ein aus zwei Längsstegen 20,21 sowie zwei stirnseitigen End¬ profilen 22,23 gebildeter, im Querschnitt etwa rechteckiger Rahmen 24 angeordnet. Die Längsstege 20,21 weisen hierbei eben¬ falls Ösen 25,26 auf. Der Rahmen 24 ist im Bereich seiner Ösen 25,26 an Ketten 27 angelenkt, die im Bereich ihres freien Endes an den Ösen 19 befestigt sind. Durch diese Ma߬ nahme wird eine pendelnde Aufhängung des Rahmens 24 gegenüber den feststehenden Trägern 9,10 bzw. der Materialaufgabesta¬ tion 1 erreicht.The invention is shown in FIGS. 1 to 6 on the basis of a side view and various sectional views. The material feed station 1 is formed by a bunker 2, which is formed from two inclined side walls 3, 4 and two end walls 5, 6. The walls 3-6 of the bundle 2 are connected with feet 7, 8 arranged in a stationary manner, which can optionally be connected to further components. On the walls 3, 4 of the bunker 2, as seen in the longitudinal direction of the bunker 2, a plurality of fixed supports 9, 10 are arranged in pairs opposite one another. Each * pair of carriers 9, 10 is used to displace a supporting roller garland 11, which is formed from at least three individual supporting rollers 12, 13, 14. The end regions 15, 16 of each idler garland 11 are detachably and possibly adjustably connected, for example by screwing to the carriers 9, 10. In the area of the inclined bunker walls 3, 4, additional supports 17, 18 are fastened, which end in eyelets 19. A frame 24, which is approximately rectangular in cross section, is arranged below the idler roller garlands 11 and is made up of two longitudinal webs 20, 21 and two end profiles 22, 23 on the front side. The longitudinal webs 20, 21 also have eyelets 25, 26 here. The frame 24 is articulated in the region of its eyelets 25, 26 to chains 27 which are fastened to the eyelets 19 in the region of their free end. As a result of this measure, a swinging suspension of the frame 24 with respect to the fixed supports 9, 10 or the material feed station 1 is achieved.
Erfindungsgemäß ragen zumindest die horizontal verlaufenden mittleren Tragrollen 13 einer jeden Tragrollengirlande 11 in den Freiraum 28 des Rahmens 24 hinein. Die mittleren Trag¬ rollen 13 einer jeden Tragrollengirlande 11 sind im Bereich ihrer freien Enden 29,30 über Verbindungselemente 31,32, beispielsweise in Form von Ketten, gelenkig miteinander verbunden. Die freien Enden 33,34,35 und 36 der Verbindungs¬ elemente 31,32 sind im Bereich der stirnseitigen Endprofile befestigt. Durch diese Maßnahme wird zwischen dem Rahmen 24 und den Tragrollen 13 eine bauliche Einheit geschaffen. Da bei der Materialaufgabe auf den Fδrdergurt 37, in Förder¬ richtung F gesehen, eine kontinuierliche Pendelbewegung des Rahmens 24 gegenüber der Materialaufgabestation 1 stattfinden würde, die u.U. zu einem unerwünschten Abschalten des Förderbandantriebes (nicht dargestellt) führen würde, sind, entgegengesetzt zur Förderrichtung gesehen, zwischen den Füßen 8 und einer Verlängerung 38 des Endprofiles 23 Flachspiralfedern 39 vorgesehen. Diese Federn 39 können auf einen Wert eingestellt oder ausgelegt werden, der etwa der Pendelbewegung des Rahmens 24 gegenüber der Materialaufgabe¬ station 1 bei normaler Materialaufgabe entspricht. Der elek¬ trische Teil der Überwachungseinrichtung wird durch einen zweiteiligen induktiven Sensor 40,41 gebildet, der bei ent¬ sprechender Auslenkung des Rahmens 24, in Förderrichtung gesehen, durch Änderung des Magnetfeldes eine Abschaltung des nicht weiter dargestellten Förderbandantriebes bewirkt.According to the invention, at least the horizontally running middle support rollers 13 of each support roller garland 11 protrude the free space 28 of the frame 24 into it. The central support rollers 13 of each support roller garland 11 are connected to one another in the region of their free ends 29, 30 via connecting elements 31, 32, for example in the form of chains. The free ends 33, 34, 35 and 36 of the connecting elements 31, 32 are fastened in the region of the front end profiles. This measure creates a structural unit between the frame 24 and the support rollers 13. Since the material feed onto the conveyor belt 37, seen in the conveying direction F, a continuous pendulum movement of the frame 24 with respect to the material feed station 1 would take place, which would possibly lead to an undesired switching off of the conveyor belt drive (not shown), are seen opposite to the conveying direction , 23 flat spiral springs 39 are provided between the feet 8 and an extension 38 of the end profile. These springs 39 can be set or designed to a value which corresponds approximately to the pendulum movement of the frame 24 relative to the material feed station 1 in the case of normal material feed. The electrical part of the monitoring device is formed by a two-part inductive sensor 40, 41 which, when the frame 24 is deflected accordingly, seen in the conveying direction, causes the conveyor belt drive (not shown) to be switched off by changing the magnetic field.
Im Falle eines Durchschlagens eines Fremdkörpers durch den Fördergurt 37 werden durch den auftreffenden Widerstand des Fremdkörpers der Rahmen 24 mit den verbundenen Tragrollen 13 der Tragrollengirlanden 11 in Förderrichtung F gegenüber dem feststehenden Anlagenteil 1 verschoben. Wie bereits angesprochen wird bei Überschreitung eines vorgegebenen Wegbereiches durch den Sensor 40,41 ein Signal gegeben und das Förderband 37 schaltet automatisch ab. Figur 7 zeigt den Erfindungsgegenstand gemäß Nebenanspruch 2. Dargestellt ist ein Rahmen 42$ der aus zwei Längsträgern 43,44 sowie zwei Querträgern 45,46 zusammengesetzt ist, die ein im Querschnitt nach innen offenes U-Prof Taufweisen« Zwischen den Längsträgern 43,44 erstrecken sich eine Vielzahl weiterer Träger 47, die zur stationären Aufnahme der Tragrollen 48,49,50 dienen. Von der Aufgabestation sind lediglich die äußeren Trägerrahmen 51,52,53 und 54 dargestellt. An den Längsträgern 43,44 sind Augen 55,56 angeschweißt. Zwischen den Trägern 51 und 54 sowie den Augen 55 und 56 erstreckt sich jeweils eine Druckfeder 57,58, die dazu dienen, extreme Auslenkungen bei der Materialaufgäbe auf den nicht weiter darge¬ stellten Fördergurt zu verhindern. Infolge der Federn 57,58 ist der Rahmen 42 gegenüber der nicht weiter dargestellten Aufgabestation elastisch, in Förderrichtung F gesehen, bewegbar. Für den Fall, daß ein Gegenstand den Fördergurt durchschlägt und an einer der Tragrollen 48-50 zur Anlage kommt, wird der Rahmen 42 gegenüber den Trägern 51-54 in Förderrichtung F mitge¬ nommen, wobei der Förderbandantrieb (nicht dargestellt) bei Überschreiten eines vorgegebenen Weges mittels einer in Figur 10 dargestellten Überwachungseinrichtung stillgesetzt wird.In the event that a foreign body penetrates through the conveyor belt 37, the frame 24 with the connected support rollers 13 of the support roller garlands 11 are displaced in the conveying direction F with respect to the fixed system part 1 by the impinging resistance of the foreign body. As already mentioned, when a predetermined travel range is exceeded, a signal is given by the sensor 40, 41 and the conveyor belt 37 switches off automatically. FIG. 7 shows the subject matter of the invention according to independent claim 2. Shown is a frame 42 $ which is composed of two side members 43, 44 and two cross members 45, 46, which have a U-Prof design "Open between the side members 43, 44" in cross section there are a large number of further carriers 47 which serve for the stationary reception of the support rollers 48, 49, 50. From the loading station only the outer support frames 51, 52, 53 and 54 are shown. Eyes 55, 56 are welded to the longitudinal members 43, 44. A compression spring 57, 58 extends between the supports 51 and 54 and the eyes 55 and 56, which serve to prevent extreme deflections in the material feed onto the conveyor belt (not shown). As a result of the springs 57, 58, the frame 42 can be moved elastically relative to the feed station (not shown further), seen in the conveying direction F. In the event that an object breaks through the conveyor belt and comes into contact with one of the support rollers 48-50, the frame 42 is taken along with respect to the carriers 51-54 in the conveying direction F, the conveyor belt drive (not shown) when a predetermined value is exceeded Way is stopped by means of a monitoring device shown in Figure 10.
Im Gegensatz zu den in den Figuren 1 bis 6 dargestellten Rahmen ragen hier die Tragrollen nicht in den Rahmen selber hinein sondern sind stationär mit ihm verbunden. In Abhängigkeit vom Anwendungsfall stellt diese Maßnahme eine einfachere Bauform gegenüber den in den Figuren 1 bis 6 angesprochenen Rahmen dar.In contrast to the frames shown in Figures 1 to 6, the idlers do not protrude into the frame itself but are connected to it in a stationary manner. Depending on the application, this measure represents a simpler design compared to the frame mentioned in FIGS. 1 to 6.
Die Figuren 8 und 9 zeigen Vertikalschnitte durch den Bunker 59 und zwar an verschiedenen Stellen. Erkennbar sind die Bunkerwände 60,61, die Förderrollen 48,49,50, der Fördergurt 62, die Trägerrahmen 51,52, der Rahmen 42 bzw. seine Längsträger 43,44 sowie die quer dazwischen angeord¬ neten Träger 47, die zur Aufnahme der Tragrollen 48-50 dienen.Figures 8 and 9 show vertical sections through the bunker 59 at different locations. The bunker walls 60, 61, the conveyor rollers 48, 49, 50, the conveyor belt 62, the carrier frames 51, 52, the frame 42 or its longitudinal members 43, 44 and the carriers 47 arranged transversely therebetween, which are used to receive the Serve rollers 48-50.
In Figur 9 ist angedeutet, daß an dem Längsträger 44 zumindest partiell sich bis in die Träger 51,52 der Aufgabevorrichtung 59 erstreckende plattenför ig ausgebildete Sicherungselemente 63 vorgesehen sind. Der untere Schenkel 64 der Längsträger 44 ruht auf einer drehbaren Stützrolle 65 und rollt bei Relativbewegung zwischen dem Rahmen 42 und der Aufgabevorrichtung 59 auf dieser ab. Bei evtl. Ausfall einer der Rollen 65 stützt sich der Rahmen über die Sicherungselemente 63 am Träger 51,52 ab.In FIG. 9 it is indicated that plate-shaped securing elements 63 extending at least partially into the carriers 51, 52 of the feed device 59 are provided on the longitudinal carrier 44. The lower leg 64 of the longitudinal beams 44 rests on a rotatable support roller 65 and rolls when the frame 42 and the relative movement Feeder 59 on this. In the event of one of the rollers 65 possibly failing, the frame is supported on the carrier 51, 52 via the securing elements 63.
In Figur 10 ist die Überwachungseinrichtung 66 vergrößert dargestellt, die analog zu der Sensoreinrichtung 40,41 gemäß Figur 1 ausgebildet ist. Ferner erkennbar sind der Längsträger 44, das Auge 56, der Träger 54 sowie dieFIG. 10 shows an enlarged view of the monitoring device 66, which is designed analogously to the sensor device 40, 41 according to FIG. 1. Furthermore, the longitudinal beam 44, the eye 56, the beam 54 and the
Feder 58, die sich zwischen dem Auge 56 und dem Träger 54 erstreckt. Die •Spring 58 which extends between the eye 56 and the carrier 54. The •
Feder 58 ist als Druckfeder ausgebildet und wird von einer Schraube 67 vorgespannt.Spring 58 is designed as a compression spring and is biased by a screw 67.
Die Funktionsweise dieser Überwachungseinrichtung ist identisch zu der gemäß den Figuren 1 bis 6. Die Überwachungseinrichtung 66 ist induktiver Art und reagiert auf Änderungen des Magnetfeldes. Bei zu starker Auslenkung des Rahmens 42 gegenüber der nicht weiter dargestellten Aufgabeeinrichtung wird der Förderbandantrieb abgeschaltet. The functioning of this monitoring device is identical to that according to FIGS. 1 to 6. The monitoring device 66 is of an inductive type and reacts to changes in the magnetic field. If the frame 42 is deflected too strongly in relation to the feed device (not shown further), the conveyor belt drive is switched off.

Claims

Patentansprüche Claims
1. Einrichtung zur insbesondere elektro-mechanischen Über¬ wachung von Förderbändern im Bereich von Aufgabestationen, die zumindest aus mehreren, an zugehörigen stationären Trägern angelenkten Tragrollengirlanden zur Aufnahme des Obertrums eines Fördergurtes gebildet sind, wobei unter-1. Device for, in particular, electro-mechanical monitoring of conveyor belts in the area of feed stations, which are formed from at least several supporting roller garlands articulated on associated stationary carriers for receiving the upper run of a conveyor belt,
- halb der Tragrollengirlanden ein mit den Trägern bzw. der Aufgabestation elastisch verbundener und mit einer Warn¬ einrichtung versehener Rahmen angeordnet ist, dadurch gekennzeichnet, daß der Rahmen (24) zumindest eine solche Breite hat, daß die im wesentlichen horizontal angeord¬ neten mittleren Tragrollen (13) einer jeden Tragrollen¬ girlande (11) in den zwischen den Längsstegen (20,21) des Rahmens (24) gebildeten Freiraum (28) zumindest teilweise hineinragen und daß beiderseits der mittleren Tragrol¬ len (13) einer jeden Tragrollengirlande (11) Verbindungs¬ elemente (31,32) vorgesehen sind, die einerseits die mitt¬ leren Tragrollen (13) sämtlicher Tragrollengirlanden (11) miteinander verbinden und deren freie Enden (33-36) andererseits außerhalb der Tragrollengirlanden an den quer zu den Längsstegen (20,21) verlaufenden Endpro¬ filen (22,23) des Rahmens (24) befestigt sind.- Half of the idler garlands is a frame which is elastically connected to the carriers or the loading station and is provided with a warning device, characterized in that the frame (24) has at least such a width that the substantially horizontally arranged middle idlers (13) of each support roller garland (11) at least partially protrude into the free space (28) formed between the longitudinal webs (20, 21) of the frame (24) and that on both sides of the central support rollers (13) of each support roller garland (11 ) Connecting elements (31, 32) are provided which on the one hand connect the central support rollers (13) of all the support roller garlands (11) and their free ends (33-36) on the other hand outside the support roller garlands on the crossways to the longitudinal webs (20 , 21) extending end profiles (22, 23) of the frame (24) are fastened.
2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Rahmen (24) im Bereich seiner beiden Längsstege (20,21) über Seile oder Ketten (27) pendelnd zumindest mit an der Aufgabestation (1) angeordneten weiteren Trägern (17,18) verbunden ist, wobei die weiteren Träger (17,18) zwischen den die Enden (15,16) der Tragrollengirlanden (11) auf¬ nehmenden Trägern (9,10) vorgesehen sind. 2. Device according to claim 1, characterized in that the frame (24) in the region of its two longitudinal webs (20, 21) oscillating via ropes or chains (27) at least with further supports (17, 18) arranged on the loading station (1). is connected, the further supports (17, 18) being provided between the supports (9, 10) receiving the ends (15, 16) of the idler roller garlands (11).
3. Einrichtung nach den Ansprüchen 1 und 2, dadurch gekenn¬ zeichnet, daß die Endbereiche der Seile oder Ketten (27) im Bereich des Rahmens (24) und/oder der zusätzlichen Träger (17,18) in daran befestigten Ösen (19,25,26) fixierbar sind.3. Device according to claims 1 and 2, characterized gekenn¬ characterized in that the end regions of the ropes or chains (27) in the region of the frame (24) and / or the additional carrier (17, 18) in eyelets (19, 25, 26) can be fixed.
4. Einrichtung nach den Ansprüchen 1 bis 3, dadurch gekenn¬ zeichnet, daß im der Fδrderrichtung (F) abgewandten Bereich des Rahmens (24) mindestens eine elastisch verformbare Vorrichtung (39) vorgesehen ist, die mit einem Teilbereich eines korrespondierenden Fußes (8) der Aufgabestation (1) verbunden ist.4. Device according to claims 1 to 3, characterized gekenn¬ characterized in that in the conveying direction (F) facing away from the frame (24) at least one elastically deformable device (39) is provided which with a portion of a corresponding foot (8) the loading station (1) is connected.
5. Einrichtung nach den Ansprüchen 1 bis 4, dadurch gekenn¬ zeichnet, daß jeweils eine elastisch verformbare Vorrich¬ tung (39) zwischen einem der Füße (8) sowie dem mit seit¬ lichen Verlängerungen (38) vorgesehenen Endprofil (23) verbunden ist.5. Device according to claims 1 to 4, characterized gekenn¬ characterized in that in each case an elastically deformable Vorrich¬ device (39) between one of the feet (8) and the side extensions (38) provided end profile (23) is connected .
6. Einrichtung nach den Ansprüchen 1 bis 5, dadurch gekenn¬ zeichnet, daß die elastisch verformbare Einrichtung (39) durch mindestens eine Flachspiralfeder gebildet ist.6. Device according to claims 1 to 5, characterized gekenn¬ characterized in that the elastically deformable device (39) is formed by at least one flat spiral spring.
7. Einrichtung nach den Ansprüchen 1 bis 6, dadurch gekenn¬ zeichnet, daß der elektrische Teil der Warneinrichtung durch einen zweiteiligen, insbesondere induktiven, Sensor (40,41), gebildet ist, der einerseits an einem der feststehenden Trägerteile (8) und andererseits am elastisch verschiebbaren Rahmen (24) bzw. an Bauteilen (20) desselben angeordnet ist. 7. Device according to claims 1 to 6, characterized gekenn¬ characterized in that the electrical part of the warning device is formed by a two-part, in particular inductive, sensor (40,41), on the one hand on one of the fixed support parts (8) and on the other is arranged on the elastically displaceable frame (24) or on components (20) thereof.
PCT/EP1990/000015 1989-01-12 1990-01-04 Installation for monitoring conveying belts WO1990008082A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3900670 1989-01-12
DEP3900670.0 1989-01-12
DEP3926558.7890811 1989-08-11
DE19893926558 DE3926558A1 (en) 1989-01-12 1989-08-11 DEVICE FOR MONITORING CONVEYOR BELTS

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CA (1) CA2007701A1 (en)
DE (1) DE3926558A1 (en)
WO (1) WO1990008082A1 (en)

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DE3926558A1 (en) 1990-07-26
CA2007701A1 (en) 1990-07-12
AU4828990A (en) 1990-08-13

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