EP3795295B1 - Schleifmaschine mit sicherheitssystem zum verhindern des auswurfs von panelen - Google Patents

Schleifmaschine mit sicherheitssystem zum verhindern des auswurfs von panelen Download PDF

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Publication number
EP3795295B1
EP3795295B1 EP20186870.0A EP20186870A EP3795295B1 EP 3795295 B1 EP3795295 B1 EP 3795295B1 EP 20186870 A EP20186870 A EP 20186870A EP 3795295 B1 EP3795295 B1 EP 3795295B1
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EP
European Patent Office
Prior art keywords
panel
sander machine
rolling member
transporting
machine
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EP20186870.0A
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English (en)
French (fr)
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EP3795295A1 (de
Inventor
Marco Venturini
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SCM Group SpA
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SCM Group SpA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/06—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving conveyor belts, a sequence of travelling work-tables or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation

Definitions

  • the present invention relates to a sander machine with a safety system to prevent the ejection of panels.
  • the safety system which the sander machine according to the invention is equipped with turns out to be particularly effective in the case of processing metal panels, although it finds advantageous application in the case of non-metal panels.
  • the invention relates to a sander machine equipped with one or more rotary sanding members and a braking member arranged downstream of the latter, to reduce the advancement speed of the panels being processed in the cases in which these have accumulated, due to the effect of the smoothing action of the smoothing members themselves, kinetic energy that is too high and therefore dangerous for the safety of the operators.
  • Traditional sander machines for the treatment of metal panels comprise one or more conveyor belts for transporting the panels to be processed, and one or more abrasive rollers arranged above said conveyor belts to smooth the upper face of the panels.
  • the rotation direction of the abrasive rollers is concordant with the advancement direction of the panel being processed.
  • This type of working process has among the various residual risks that of the possible ejection of the panels leaving the machine, deriving from the fact that the tangential component of cutting, or abrasion, is parallel to the panel advancement plane.
  • Another object of the invention is to provide a sander machine with a safety system to prevent the ejection of panels, which does not compromise the safety of the operators present in the areas surrounding said machine.
  • a further object of the present invention is to provide a sander machine with a safety system to prevent the ejection of panels, which is such as to increase the passive safety of the machine itself.
  • a sander machine for sanding at least one panel, comprising an operative station which is provided with an inlet and an outlet which is placed downstream from said inlet, at least one transporting member for transporting, in use, said at least one panel, according to a transporting speed, from said inlet to said outlet according to a predetermined advancing direction, at least one rotating abrasive member for sanding said at least one panel placed on said at least one transporting member, said at least one rotating abrasive member being rotatable in the same direction as said predetermined advancing direction and placed above said at least one transporting member between said inlet and said outlet, said sander machine being characterized in that it comprises a braking device comprising in turn a rolling member which is able to roll on said at least one panel and arranged facing said outlet and above said at least one transporting member between said at least one rotating abrasive member and said outlet, and a braking member, which is connected with said rolling member and able to
  • said braking member comprises motor means which are connected with said rolling member and configured to make said rolling member rotate at a predetermined speed in the same direction as said at least one rotating abrasive member, such that said rolling member slips on said at least one panel slowing down the advancing movement of the at least one panel when said at least one panel exceeds said predetermined speed.
  • said braking member further comprises a clutch arranged between said motor means and said rolling member.
  • said rolling member is a roller which is provided with an outer surface configured to generate, in use, friction with said at least one panel.
  • said predetermined speed of said rolling member is synchronized with said transporting speed of said at least one transporting member.
  • said outer surface of said roller is made of rubber.
  • said outer surface of said roller is substantially smooth.
  • said rolling member protrudes downward by a predetermined height with respect to said at least one rotating abrasive member.
  • said machine can comprise at least one flexible means for transmitting a rotating motion, which is connected with said motor means and said rolling member to transmit a rotating motion from said motor means to said rolling member.
  • said machine can comprise a warning system that is configured to provide an operator with an acoustic and/or visual and/or tactile warning signal when said at least one panel is decelerated.
  • said warning system is configured to send said warning signal to wearable devices, and/or movable devices, and/or desktop personal computer.
  • said warning system is configured to send said warning signals to a remote cloud server, which sends, in turn, said warning signals to wearable devices, and/or movable devices, and/or desktop personal computer.
  • said warning system comprises an accelerometer configured to measure vibrations of said sander machine or said rolling member, or a sensor of capacitive, optic or inductive type, or a mechanical feeler configured to detect an anomaly, preferably a reduction and/or increase in the tension of said at least one flexible means.
  • said at least one transporting member comprises a conveyor belt.
  • Said sander machine 1 comprises a frame 2 and an operative station 3 supported by said frame 2.
  • the operative station 3 provides an external cabin or an external casing 3', in which an inlet 4 and an outlet 5 are defined for the panels to be treated or to be sanded.
  • a conveyor belt 6 is provided in the same operative station 3, which moves according to a transporting speed, operating in such a way as to impart a movement to said panel P according to a predetermined advancement direction F.
  • Said abrasive rollers 7, 8, 9 are arranged one after the other according to said predetermined advancement direction F, and can be operated by means of respective drive systems 10, 11, 12, so as to be capable of rotating around the respective rotation axes in a direction according to this predetermined advancement direction F.
  • the rotation axes of the three abrasive rollers 7, 8, 9 are parallel to the plane, on which the panel P lies and moves in the operative station 3.
  • a braking device 13 comprising a rolling member 131, such as a roller, and a braking member 132, coupled to said rolling member 131.
  • Said roller 131 is provided with a substantially smooth rubber coating.
  • Said roller 131 is arranged downstream of the abrasive rollers 7, 8, 9, and precisely between the outlet 5 and the abrasive roller 9 closest to it.
  • said roller 131 is arranged opposite said outlet 5, and above said conveyor belt 6, between said at least one rotary abrasive member 7, 8, 9 and said outlet 5.
  • the roller 131 is arranged above the conveyor belt 6 and is also rotatable around a fixed axis of rotation parallel to the aforementioned lying plane in a direction concordant with said predetermined advancement direction F.
  • the roller 131 is positioned in such a way that it protrudes below by a predetermined height with respect to the abrasive rollers 7, 8, 9, so that the same roller 131 is capable of exerting a pressure on the panel P while transiting on the conveyor belt 6.
  • Said braking member 132 is capable of driving said roller 131 in rotation around its own axis by means of a motor controlled by an inverter and a chain 14 or a belt to transmit the rotary motion from said motor to the roller 131.
  • said roller 131 is subject to less wear.
  • the sander machine 1 also comprises an alarm system for providing an audible and/or visual alarm signal to the operator in case of braking of the panel P by the roller 131.
  • the aforementioned warning system comprises an accelerometer suitable for measuring the vibrations of the sander machine 1 or of the roller 131, or a sensor 15 of capacitive, optical or inductive type or a mechanical feeler associated with the chain or transmission belt of the roller 13 to detect the sudden movement of said chain or belt caused by the impact suffered by the latter during the braking.
  • Said warning system is configured to send an acoustic, and/or visual, and/or tactile alarm signal to an operator in case of the braking of said at least one panel P, or to wearable devices, and/or mobile devices, and/or desktop personal computers.
  • said warning system is configured to send said alarm signal to a remote cloud server, which in turn sends said alarm signal to wearable devices, and/or mobile devices, and/or desktop personal computers.
  • the aforesaid braking action is possible thanks to the friction that is created between the rubberized part of the roller 131 and the upper face of the panel P due to the pressure exerted on the latter by the roller 131.
  • roller 131 and the members and the devices associated with it to allow their correct operation allow to effectively exclude any risk of violent ejection of the panels P from the sander machine 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (14)

  1. Schleifmaschine (1) zum Schleifen von zumindest einer Platte (P), umfassend eine Arbeitsstation (3), ausgestattet mit:
    einem Einlauf (4) und einem Auslauf (5), der stromabwärts von dem Einlauf (4) angeordnet ist;
    zumindest einem Förderelement (6), um, beim Gebrauch, die zumindest eine Platte (P) mit einer Fördergeschwindigkeit entlang einer vorgegebenen Vorschubrichtung (F) von dem Einlauf (4) zu dem Auslauf (5) zu befördern;
    zumindest einem rotierenden Schleifelement (7, 8, 9) zum Schleifen der zumindest einen Platte (P), die auf dem zumindest einen Förderelement (6) angeordnet ist, wobei das zumindest eine rotierende Schleifelement (7, 8, 9) in einer Richtung drehbar ist, die der vorgegebenen Vorschubrichtung (F) entspricht, und auf dem zumindest einen Förderelement (6) zwischen dem Einlauf (4) und dem Auslauf (5) angeordnet ist;
    wobei die Schleifmaschine (1) dadurch gekennzeichnet ist, dass sie eine Bremsvorrichtung (13) umfasst, die wiederum umfasst:
    ein Rollelement (131), das auf der zumindest einen Platte (P) rollen kann und dem Auslauf (5) zugewandt und über dem zumindest einen Förderelement (6) zwischen dem zumindest einen rotierenden Schleifelement (7, 8, 9) und dem Auslauf (5) angeordnet ist; und
    ein Bremselement (132), das mit dem Rollelement (131) verbunden und in der Lage ist, das Rollen des Rollelements (131) so zu verlangsamen, dass die Vorschubbewegung der zumindest einen Platte (P) abgebremst wird.
  2. Schleifmaschine (1) nach Anspruch 1, dadurch gekennzeichnet, dass das Bremselement (132) Motormittel umfasst, die mit dem Rollelement (131) verbunden und konfiguriert sind um zu bewirken, dass sich das Rollelement (131) mit einer vorgegebenen Geschwindigkeit in dieselbe Richtung dreht wie das zumindest eine rotierende Schleifelement (7, 8, 9), so dass das Rollelement (131) auf der zumindest einen Platte (P) rutscht und somit die Vorschubbewegung der zumindest einen Platte (P) abbremst, wenn die zumindest eine Platte (P) die vorgegebene Geschwindigkeit überschreitet.
  3. Schleifmaschine (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass das Bremselement (132) ferner eine Kupplung umfasst, die zwischen den Motormitteln und dem Rollelement (131) angeordnet sind.
  4. Schleifmaschine (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Rollelement (131) eine Rolle ist, die mit einer Außenoberfläche versehen ist, die dafür konfiguriert ist, beim Gebrauch eine Reibung mit der zumindest einen Platte (P) zu erzeugen.
  5. Schleifmaschine (1) nach einem der Ansprüche 2-4, dadurch gekennzeichnet, dass die vorgegebene Geschwindigkeit des Rollelements (131) mit der Fördergeschwindigkeit des zumindest einen Förderelements (6) synchronisiert ist.
  6. Schleifmaschine (1) nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass die Außenoberfläche der Rolle (131) aus Gummi hergestellt ist.
  7. Schleifmaschine (1) nach einem der Ansprüche 4-6, dadurch gekennzeichnet, dass die Außenoberfläche der Rolle (131) im Wesentlichen glatt ist.
  8. Schleifmaschine (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Rollelement (131) in Bezug auf das zumindest eine rotierende Schleifelement (7, 8, 9) um eine vorgegebene Höhe nach unten hervorragt.
  9. Schleifmaschine (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie zumindest ein flexibles Mittel (14) zum Übertragen einer Drehbewegung umfasst, das mit den Motormitteln und dem Rollelement (131) verbunden ist, um eine Drehbewegung von den Motormitteln auf das Rollelement (131) zu übertragen.
  10. Schleifmaschine (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie ein Warnsystem umfasst, das dafür konfiguriert ist, einer Bedienperson ein akustisches und/oder optisches und/oder taktiles Warnsignal bereitzustellen, wenn die zumindest eine Platte (P) abgebremst wird.
  11. Schleifmaschine (1) nach Anspruch 10, dadurch gekennzeichnet, dass das Warnsystem konfiguriert ist, um das Warnsignal an tragbare Geräte, und/oder mobile Geräte, und/oder Desktop Personal Computer zu senden.
  12. Schleifmaschine (1) nach Anspruch 11, dadurch gekennzeichnet, dass das Warnsystem konfiguriert ist, um die Warnsignale an einen entfernten Cloud Server zu senden, der diese Warnsignale wiederum an tragbare Geräte, und/oder mobile Geräte, und/oder Desktop Personal Computer sendet.
  13. Schleifmaschine (1) nach einem der Ansprüche 10-12, dadurch gekennzeichnet, dass das Warnsystem einen Beschleunigungsmesser umfasst, der dafür konfiguriert ist, Vibrationen der Schleifmaschine (1) oder des Rollelements (131) zu messen, oder einen Sensor (15) kapazitiver, optischer oder induktiver Art umfasst, oder einen mechanischen Fühler umfasst, der konfiguriert ist, eine Anomalie, vorzugsweise eine Verringerung und/oder Erhöhung der Spannung des zumindest einen flexiblen Mittels (14), zu erkennen.
  14. Schleifmaschine (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das zumindest eine Förderelement ein Förderband (6) umfasst.
EP20186870.0A 2019-08-29 2020-07-21 Schleifmaschine mit sicherheitssystem zum verhindern des auswurfs von panelen Active EP3795295B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000015228A IT201900015228A1 (it) 2019-08-29 2019-08-29 Macchina levigatrice con sistema di sicurezza contro l’eiezione di pannelli.

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EP3795295A1 EP3795295A1 (de) 2021-03-24
EP3795295B1 true EP3795295B1 (de) 2022-04-13

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IT (1) IT201900015228A1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100007355A1 (it) * 2021-03-25 2022-09-25 Scm Group Spa Macchina con sistema di trasporto perfezionato.

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3832808A (en) * 1973-07-09 1974-09-03 Timesavers Inc Abrasive belt-type lumber planing machine
ES2081792T1 (es) * 1994-05-24 1996-03-16 Timesavers Inc Topes limitadores de desplazamiento automaticamente asegurables para zapatas de presion usadas en una maquina de acabado con abrasivo.
DE19915909C2 (de) * 1998-12-11 2003-05-28 Steinemann Technology Ag St Ga Verfahren zur Steuerung des Schleifprozesses sowie Rechnersteuerung für Breitschleifmaschine
US6913512B2 (en) * 2002-08-21 2005-07-05 Howard W. Grivna Material removal monitor

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EP3795295A1 (de) 2021-03-24

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