CH179168A

CH179168A - Automatic protection and safety device intended for use on presses and similar machines.

Info

Publication number: CH179168A
Authority: CH
Inventors: Albert Crelerot Henri
Original assignee: Albert Crelerot Henri
Priority date: 1934-09-08
Filing date: 1934-09-08
Publication date: 1935-08-31

Description

Dispositif automatique de protection et de securite destine ä etre utilise Sur les pressec et machines similaires. Les dispositifs automatiques de protec- tion et de securite, destines ä etre utilises Sur les pressec et machines similaires telles que les pressec ä. decouper, ä emboutir, comportent generalement un volet mobile de protection, deplace par 1'organe de contröle de la ma- chine et qui vient s'interposer entre celle-ei et 1'onvrier des qu'on agit Sur cet o,rgane de eontröle. Le volet, qui est amene en Posi tion de protection automatiquement avant la mise en fonction?iement de la machine, chasse les mains de 1'ouvrder hors de la tra.je-ctoire des outils, dans 1e ras dune maladresse, dune inattention ou d'une imprudence de 1'ouvrier. Automatic protection and safety device intended for use on presses and similar machines. Automatic protection and safety devices intended for use on presses and similar machines such as presses ä. cutting, stamping, generally include a movable protective flap, moved by the control device of the machine and which comes to interpose itself between the latter and the operator as soon as one acts on this control device. control. The shutter, which is brought into the protective position automatically before the machine is started, chases the operator's hands out of the path of the tools, in the face of clumsiness, inattention or of a worker's imprudence.

Ces dispositifs de protection ne permet- tent cependant pas d'eviter les prinoipaux accidents, qui ne se produisent que rarement ä. 1a- mise en fonctionnement .de la machine mais generaleinent par Suite Tun retour de la maehine ou d'un double provoque par la rupture d'un organe de la presse, et no- tamment de la clavette -d'arret, ce retour ou ce double s'effectuant lonsque 1'organe de con- tröle de la machine est au repos et que, par Suite, 1e volet protecteur est hors d'action. However, these protective devices do not make it possible to avoid major accidents, which occur only rarely. the start-up of the machine but generally subsequently a return of the machine or of a double caused by the rupture of a member of the press, and in particular of the key -d'arret, this return or this double being effected when the control member of the machine is at rest and when, subsequently, the protective shutter is out of action.

La presente invention a pour but de re- medier aux inconvenients preeites et 1e dispo- sitif automatique @de protection et de securite qui en fait 1'objet se caracterise en ce que 1e volet mobile .de prote-ction Best egalement de- plac6 par un organe mobile de rette machine, de maniere que 1e volet soit amene en Position de protection independamment de la Position de 1'organe de contröle, des que la machine fonetionne. The object of the present invention is to remedy the aforementioned drawbacks and the automatic device for protection and safety which is the subject of it is characterized in that the mobile shutter Best also moved by a movable member of the machine, so that the first shutter is brought into the protective position independently of the position of the control member, as soon as the machine is working.

Cette disposition simple permet, en ras d'un fonetionnement accidentel dune presse, lorsque 1'organe de contröle est en Position de repos, de placer automatiquement 1e volet en- tre la mathine et 1'ouvrier tout en ehassant les mains de celui-ei. This simple arrangement makes it possible, in the event of accidental operation of a press, when the control member is in the rest position, to automatically place the flap between the machine and the worker while ehassing the latter's hands. .

Une forme d'executio.n du dispositif de protectiou et de secuizte peut, par exemple, se caracteriser en ce qu'une eame, montee Sur 1'arbre vilebrequin de la presse, agit Sur un One form of execution of the protection and safety device may, for example, be characterized in that a blade, mounted on the crankshaft of the press, acts on a

levier sollicite dans une .direction par un res sort, ee levier @tant reli6 cin6matiquement au volet. lever urged in one direction by a spring, the lever being connected kinematically to the flap.

Dans une variante, 1e levier peut eire ar ticule ä une extr6mi-#e du volet, lequel est guide ä son autre extr6mit6 sur un rail .de guidage. Alternatively, the lever may be articulated at one end of the shutter, which is guided at its other end on a guide rail.

La liaison cinAmatique, entre Porgane de eontröle de la machine et 1e volet de prote-c tion, peut comporter un multiplicateur provo quant, pour un faible mouvement de la pe dale, un .dAplacement important,du volet. The kinematic connection, between the machine's control organ and the first prote-c tion flap, may include a provoking multiplier, for a slight movement of the pedal, a significant displacement of the flap.

Le multiplicateur peut etre constitu6 par un dispositif du type moufle et comporter deux s6ries de poulies, les poulies de la Pre miere s@rie -etant tourillonnees sur un axe fixe et les poulies de la seconde sur un axe reli6 ä une Pedale de-eommande, une chaine, fix6e ä ses extr6mit6s, dune Part, en un point fixe et, d'autre Part, au volet protecteur, Passant suc eessivement et alternativement sur les pou lies de chaque serie. The multiplier can be constituted by a device of the muffle type and comprise two series of pulleys, the pulleys of the first series being journalled on a fixed axis and the pulleys of the second on an axis connected to a control pedal , a chain, fixed at its ends, on the one hand, to a fixed point and, on the other hand, to the protective flap, Passing successively and alternately over the pulleys of each series.

La tige de liaison ä la p6dale peut eire r6 glable en longueur. The connecting rod to the pedal can be adjustable in length.

Le point de fixation de 1a chaine ou oäble au volet de proteetion peut etre rA.glable. The attachment point of the chain or rope to the protection flap can be adjustable.

Le bord avaut du volet peut comporter un dispositif 61astique de protection constitue par un boudin de ,caoiitehou-c recourb6 en U. The avaut edge of the flap may comprise a 61astique protection device constituted by a sausage of, caoiitehou-c recourb6 in U.

Le volet de protection peut Ure articule sirr deux bras paralleles, eux-memes articules sirr la machine, de maniere que 1'ensemble constitue un Parallelogramme articu16. The protective shutter can Ure articulated sirr two parallel arms, themselves articulated sirr the machine, so that 1'ensemble constitutes a parallelogram articu16.

Le volet peut etre verrouill6, en Position de protection, par un bras s'appliquant contre une butee, en ras de fermeture du volet par la came. The shutter can be locked, in the protective position, by an arm resting against a stop, flush with the closure of the shutter by the cam.

Le volet de protection peut eire coinbin6 avec un volet secondaire mobile en translation verticale sirr 1e Premier et sollicit6 constam ment en position de fermeture dune lumiere qui est menagee Jans 1e volet de protection. The protective shutter can eire coinbin6 with a secondary movable shutter in vertical translation sirr the first and solicit6 constantly in the closed position of a light which is provided Jans first protective shutter.

Le dessin annexe repr6sente, ä titre d'exemple seulement, des formes d@ex6.cutioii -d'un dispasitif automahqwe de protection et ,de securit6 Jestin6 ä etre utilis6 sirr les presses et machines similaires. The appended drawing shows, by way of example only, exemplary forms of an automatic protective and safety device intended to be used on presses and similar machines.

La fig. 1 est une @l6vation d'ensemble dune Premiere forme d'exkution dun dispo sitif protecteur mont6 sur une presse; La fig. 2 est un Profil partiel correspon dant, ä plus .grande Gehelle, müntrant plus specialement 1e multiplicateur de d6pla-ce ment; La fig. 3 est une -616vation s,ch & matique dune seconde forme d'exkution; La fig. 4 est une perspective sch6matique dune troisieme forme d'ex6eution; La fig. 5 est une 616vation d'ensemble dune quat.rieme forme d'ex6eution; La fig. 6 est une dlevation du volet pro tecteur, ä plus grande 6chelle, et correspon dant .ä la figure pr@@cedente, une coupe par tielle Mant effeetu6e suivant la ligne VI-VI de la fig. 7; La fig. 7 est un plan du @dispositif -d'at tache .du volet au bras de commande. fig. 1 is an overall elevation of a first embodiment of a protective device mounted on a press; fig. 2 is a corresponding partial profile, at a larger Gehelle, showing more specifically the first displacement multiplier; fig. 3 is a schematic elevation of a second form of execution; fig. 4 is a schematic perspective view of a third embodiment; fig. 5 is an overall elevation of a fourth embodiment; fig. 6 is an elevation of the protective flap, on a larger scale, and corresponding to the preceding figure, a partial section Mant effected along the line VI-VI of FIG. 7; fig. 7 is a plan of the @dispositif -d'at tache. du shutter to the control arm.

La presse 1 comporte un volet 2 de protec tion actionn6 normalement par la p6dale 6 de contröle -de la presse, mais qui est 6galement d,6plac6, pour constituer une s6curit6, par un organe mobile de rette presse qui est .dans cet exemple une came 18 agissant sur un galet 29 mont6 sur un bras 15. Ce bras est articu16, ,d'une pari, autoirr d'un point fixe 16 et, d'autre paxt, ä une extr6mit6, en 22, sirr 1e vo let 2, 1'autre extremit6 du bras kernt so@umise .ä 1'a@etion d'un ressort 17. The press 1 comprises a protective flap 2 actuated normally by the control pedal 6 of the press, but which is also moved, to constitute a safety feature, by a mobile member of the press which is, in this example, a cam 18 acting on a roller 29 mounted on an arm 15. This arm is articu16, on the one hand, around a fixed point 16 and, on the other hand, at one end, at 22, sirr the first flap 2 , the other end of the kernt arm subjected to the a@etion of a spring 17.

0n interpose, entre la Pedale 6 et 1e volet 2, un multiplicateur de dAplacement constitue ,de pr6ference par deux s6ries .de poulies; les poulies 30 de la Premiere s6rie sont tourillon n6es sirr un axe fixe 31 et les poulies 32 de la seconde s6rie .sont tourillonnees sirr un axe 33 mont6,dans une fourche 34 terminant la Par tie suphieure de la tige 7 de liaison ä la p6 dale 6. 0n interposes, between the Pedal 6 and the first shutter 2, a displacement multiplier constitutes, preferably by two series of pulleys; the pulleys 30 of the First series are pinned on a fixed axis 31 and the pulleys 32 of the second series are pinned on an axis 33 mounted in a fork 34 terminating in the upper part of the rod 7 connecting to the p6 slab 6.

Un cäble ou une chaine 35, fix6 ä une ex tr6mitA en 36, au volet 2, et ä son autre extre mit6 ä un point fixe 37, passe successivement et alternativement sirr les poulies 30 et 32 de chaque s6rie, 1e nombre des poulies, par s6 rie, 6tant @6videmment fonction,de la multipli cation Usirk. La longueur de la tige 7 p^a@t ehre regl6e. A cable or chain 35, fixed at one end at 36, to shutter 2, and at its other end at a fixed point 37, passes successively and alternately over pulleys 30 and 32 of each series, the first number of pulleys, by series, being obviously a function of the Usirk multiplication. The length of the rod 7 p^a@t ehre regulated.

La fig. 3 illustre une autre forme d'exe cution dann laquelle 1e vol-et 2 est maintenu par deux bras 39 et 40, articules ä leurs ex tr6mites respeetivement sur 1e volet et sur des axes fixes, de maniere ä coustituer un pa ra,llelogramme arti.cule. fig. 3 illustrates another form of execution in which the flight and 2 is held by two arms 39 and 40, articulated at their extremities respectively on the first shutter and on fixed axes, so as to create an arti .cule.

Dans une variante d'exkution, 1e volet prineipal de protection peut etre combine avec un volet secondaire mobile en translation ver ticale sur 1e premier. Ce second volet peut etre sollicite vers 1e bas par la pesanteur ou par 1'intermediaire d'un ressort, de maniere quo 1'espace entre 1e tablier ou la table de la machine et 1e volet soit constamment obture tout en permettant cependant 1e passage de bandes,ä d-kouper ou ä emboutir. In a variant of execution, the first protective shutter can be combined with a secondary shutter mobile in vertical translation on the first. This second flap can be biased downwards by gravity or by the intermediary of a spring, so that the space between the apron or the table of the machine and the first flap is constantly closed while nevertheless allowing the passage of strips, to cut or to stamp.

Dans la forme d'exkution representee aux fig. 5, 6 et 7, 1e bras 15 est solidarise avec une piece 50 formant rollier par 1'interme diaire d'un ecrou 51 et d'un bouton 52. Cette pike peut etre orientee et immobilisk, Jans une piece 54, par une vis 55, rette pike 54 etant articulk, par un axe 56, dans une chape 57 montee sur 1e volet 2. In the form of execution represented in figs. 5, 6 and 7, the first arm 15 is secured to a part 50 forming a rollier by means of a nut 51 and a button 52. This pike can be oriented and immobilized, Jans a part 54, by a screw 55, rette pike 54 being articulated, by an axis 56, in a yoke 57 mounted on the first shutter 2.

Le bord avant du volet 2 comporte un amortisseur 58 de caoutchoue constitue, de preference, par une bande recourbk en U et rivee sur 1e volet 2. The front edge of the flap 2 comprises a rubber damper 58 constituted, preferably, by a curved band in U and riveted on the first flap 2.

En ras d'embrayage de 1a. presse, provo que accidentellement, la came ferme 1e volet; a cet instant, la chaine se trouve d.,Atendue et 1e doigt 60, sous 1'effet de 1a. pesanteur ou d'un ressort, bascule dann 1e sens de la flehe 62, son deplacement etant limite par une bu tee 63 de maniere quo 1e doigt 60 vienne s'arreter contre une butee 64 fixee au rail 3 comme 1e montre la fig. 6. D.? rette manike, IL, volet 2 est verrouille, en position de pro tection, son deverrouilla.ge etant effectue automatiquement des qu'on agit sur la pedale de eommande de la machine, la .chaine etant fixee en 60a au brazz 60, de maniere ä ramener ae bras dann Faxe d-2 tensiou de la ehaine et ä 1e degager de la butee 64. Flush with 1a clutch. presses, causing the cam to accidentally close the shutter; a at this instant, the chain is d., Extended and the finger 60, under the effect of 1a. gravity or a spring, rocker dann the first direction of the arrow 62, its movement being limited by a bu tee 63 so that the first finger 60 comes to rest against a stop 64 fixed to the rail 3 as the first shown in FIG. 6. D.? rette manike, IL, shutter 2 is locked, in the position of protection, its unlocking. to bring the arm back into the tension of the chain and to disengage it from the stop 64.

La gatte 59 est terminee, ä sa pa.rtie infe rieure, par un doigt 65 obligeant 1e volet ä suivre 1e ra.il. La commande automatique de securite du volet par la machine, au moment oü celle-ci fon ctionne, peut etre assuree par 1'un quel- conque des organes mobiles de la machine. The gate 59 is terminated, at its lower part, by a finger 65 obliging the first flap to follow the first rail. The automatic safety control of the shutter by the machine, when the latter is in operation, can be ensured by any of the moving parts of the machine.

Claims

CLAIM Automatic device for protection and, of se urite, intended for ä. eire used on presses and similar machines, and which comprises a movable protective shutter, moved by the control organ of the machine, characterized in that the movable protective shutter is also (moved by a movable china, so that the first flap is in the protective position, independently of the position of the control unit, when the machine works. in that a cam, mounted on the crankshaft of the press, acts on a lever biased in one direction by a spring, this lever being automatically linked to the shutter.

2 Device according to claim and sub-claim 1, characterized in that the lever is articulated at one end of the shutter, which is guided at its other end on a guide rail.

3 Device according to claim and los sub-claims 1 and 2, characterized in that the kinematic connection, between the organ of the trölle neck of the machine and the first shutter of protection, comprises a multiplier causing, for a slight movement of the pedal, a significant displacement of the flap.

4 Device according to the claimed claim and the sub-claims 1, 2 and 3, cara-cterise in that the first multiplier is constituted by a .dispositif of the muffle type and comprises two series of pulleys, los. pulleys of the first series being journalled on a fixed axis and the pulleys of the second on an axis connected to a control pedal, a chain, fixed at its ends, to a gart, in a fixed point and, from another guy, at

protective shutter Passing successively and alternately over the pulleys of each series 5 Device according to claim and sub-claims 1 to 4, characterized in that the rod connecting to the Pedal is adjustable in length. 6 Device according to claim and sub-claims 1 to 4, characterized in that the first point of attachment of the chain to the protective flap is adjustable. 7 Device according to claim and sub-claims 1, 3 and 3, characterized in that the first front edge of the flap co.mporte an elastic protection device cons titu6 by a rubber bead re curb6 in U. 8 Device according to claim, charac t6ris6 in that the first shutter -of protection is

articulated on two parallel arms, themselves articulated on the machine, so that the whole constitutes an articulated para.lle logram. 9 Device according to claim and sub-claim 1, characterized in that the first flap is locked in the protective position by an arm bearing against a stop in the event of closure of the flap by 1a. cam. 10 Device according to claim, charac t6ris6 in that the first protective flap is -combine with a mobile secon.daire flap in translation, n vertical on the first and solicited @ constantly in the closed position meture Tune light which is menag @ e. in the 1st protective pane.