FR2459087A1 - Press safety cut=out device - uses sprung bar to operate switches carried by pivoted press arm - Google Patents
Press safety cut=out device - uses sprung bar to operate switches carried by pivoted press arm Download PDFInfo
- Publication number
- FR2459087A1 FR2459087A1 FR7916322A FR7916322A FR2459087A1 FR 2459087 A1 FR2459087 A1 FR 2459087A1 FR 7916322 A FR7916322 A FR 7916322A FR 7916322 A FR7916322 A FR 7916322A FR 2459087 A1 FR2459087 A1 FR 2459087A1
- Authority
- FR
- France
- Prior art keywords
- arm
- rigid rod
- press
- circuit
- descent
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
- F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
- F16P3/16—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine with feeling members moved by the machine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/22—Safety devices specially adapted for cutting machines
- B26D7/24—Safety devices specially adapted for cutting machines arranged to disable the operating means for the cutting member
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Auxiliary Devices For Machine Tools (AREA)
Abstract
Description
La présente invention concerne le domaine des équipements de sécurité de presses, en particulier de presses à bras pivotant, et a pour objet un dispositif de sécurité pour presse à découper à bras pivotant. The present invention relates to the field of press safety equipment, in particular presses with pivoting arm, and relates to a safety device for a cutting press with pivoting arm.
Actuellement, les presses à découper à bras pivotant sont généralement munies d'un levier manoeuvrable d'une main, et d'un contacteur manuel actionné au moyen de l'autre main, afin d'éviter les risques d'accident tels qu'un écrasement de la mzin ou des doigts. Dans de telles machines, la sécurité peut aussi être assurée par des dispositifs à double commande obligeant l'opérateur, par exemple, à appuyer simultanément sur deux boutons de commande suffisamment éloignés l'un de l'autre pour nécessiter l'utilisation des deux mains. Currently, cutting presses with pivoting arms are generally provided with a lever which can be operated with one hand, and a manual contactor actuated by means of the other hand, in order to avoid the risk of accidents such as crushing of the mzin or fingers. In such machines, safety can also be ensured by dual-control devices forcing the operator, for example, to simultaneously press two control buttons far enough apart from one another to require the use of both hands .
Toutefois, ces dispositifs de sécurité connus ne permettent généralement pas un bon rendement, du fait de l'importante perte de temps due aux manipulations des dispositifs lors de chaque cycle de travail. However, these known safety devices generally do not allow good performance, due to the significant loss of time due to the handling of the devices during each work cycle.
La présente invention a pour but de pallier ces inconvénients. The present invention aims to overcome these drawbacks.
Elle a, en effet, pour objet un dispositif de sécurité pour presse à découper à bras pivotant, essentiellement constitué par un contacteur fin de course ou interrupteur de position placé sur le bras pivotant, coopérant avec une tige rigide montée avec espacement sur le bras pivotant au moyen de lames-ressorts. It has, in fact, for its object a safety device for a cutting press with a swivel arm, essentially constituted by a limit switch or position switch placed on the swivel arm, cooperating with a rigid rod mounted with spacing on the swivel arm by means of leaf springs.
Conformément à une caractéristique de l'invention, le contacteur fin de course est une vanne toute position reliée à la tige rigide au moyen d'un levier de commande. According to a characteristic of the invention, the limit switch is an all position valve connected to the rigid rod by means of a control lever.
L'invention sera mieux comprise grâce à la description ciaprès, qui se rapporte à un mode de réalisation préféré, donné à titre d'exemple non limitatif, et expliqué avec référence aux dessins schématiques annexés, dans lesquels la figure 1 est une vue en plan du dispositif conforme à l'invention monté sur un bras pivotant de presse à découper, et la figure 2 est une vue en Slévation latérale du dispositif de la figure 1. The invention will be better understood from the following description, which relates to a preferred embodiment, given by way of nonlimiting example, and explained with reference to the appended schematic drawings, in which FIG. 1 is a plan view of the device according to the invention mounted on a pivoting cutting press arm, and FIG. 2 is a view in side elevation of the device of FIG. 1.
Conformément à l'invention, et comme le montrent, à titre d'exemple, les figures 1 et 2 des dessins annexés, le dispositif de sécurité pour presse à découper à bras pivotant est essentiellement constitué par un contacteur fin de course 1 solidaire du bras pivotant 2, et dont le levier 3 coopère avec une tige rigide 4, de préférence métallique, montée avec espacement sur le bras pivotant 2 au moyen de lames-ressorts 5. In accordance with the invention, and as shown, by way of example, in Figures 1 and 2 of the accompanying drawings, the safety device for a cutting press with a pivoting arm is essentially constituted by a limit switch 1 fixed to the arm pivoting 2, and the lever 3 of which cooperates with a rigid rod 4, preferably metallic, mounted with spacing on the pivoting arm 2 by means of leaf springs 5.
les lames-ressorts 5 sont de préférence des lames très sensibles, et maintiennent la tige rigide 4 à une distance constante, de préférence de 3 cm, des bords du bras 2, de telle manière que tout déplacement, à un endroit quelconque, de la barrière formée par cette tige, a pour effet de provoquer une tension sur ladite tige 4, et ainsi un actionnement du contacteur 1 au moyen de son levier 3, par déplacement de ce dernier hors de sa position de re pos,
Pour permettre une meilleure protection de lropérateur, la tige 4 est, en outre, décalée vers le bas par rapport à la surface inférieure du bras 2, vers le plateau de presse 6, de sorte qu'une main, meme posée à plat sur le plateau 6, provoquera un déplacement de la tige 4, qui aura pour effet de déclencher le contacteur 1.Ce déclenchement du contacteur 1 arrêtera immédiatement la descente du bras 2, et, éventuellement, de manière connue, provoquera la remontée dudit bras 2 à son point de départ au moyen d'un inverseur de descente.the leaf springs 5 are preferably very sensitive blades, and keep the rigid rod 4 at a constant distance, preferably 3 cm, from the edges of the arm 2, so that any movement, at any location, of the barrier formed by this rod, has the effect of causing a tension on said rod 4, and thus an actuation of the contactor 1 by means of its lever 3, by displacement of the latter out of its rest position,
To allow better protection for the operator, the rod 4 is, moreover, shifted downward relative to the lower surface of the arm 2, towards the press plate 6, so that one hand, even placed flat on the plate 6, will cause a displacement of the rod 4, which will have the effect of tripping the contactor 1.This tripping of the contactor 1 will immediately stop the descent of the arm 2, and, possibly, in a known manner, will cause the ascent of said arm 2 to its starting point by means of a descent reverser.
Dans le cas du positionnement de la tige 4 par rapport à la surface inférieure du bras 2, il est essentiel que la tige 4 et le bras 2 soient au moins au meme niveau. Un décalage de la tige 4 vers le bas par rapport à la surface inférieure du bras 2 améliore donc sensiblement la sécurité. In the case of positioning the rod 4 relative to the lower surface of the arm 2, it is essential that the rod 4 and the arm 2 are at least at the same level. A shift of the rod 4 downward relative to the lower surface of the arm 2 therefore significantly improves safety.
Conformément à une variante de réalisation de l'invention, non représentée aux dessins annexés, le dispositif de sécurité peut être constitué par un circuit électronique coopérant avec la barrière formée par la tige rigide. Dans ce cas, la poignée de commande est isolée et est, par exemple, reliée au pâle moins d'une source de courant, et la tige rigide est également isolée et est reliée au pâle plus de cette source, de sorte que si l'opérateur touche simultanément la poignée et la tige rigide, il provoque un court circuit qui est transformé par le circuit électronique en une impulsion d'arrêt de la descente du bras pivotant. According to an alternative embodiment of the invention, not shown in the accompanying drawings, the safety device can be constituted by an electronic circuit cooperating with the barrier formed by the rigid rod. In this case, the control handle is insulated and is, for example, connected to the blade less than one power source, and the rigid rod is also insulated and is connected to the blade more than this source, so that if the operator simultaneously touches the handle and the rigid rod, it causes a short circuit which is transformed by the electronic circuit into a pulse to stop the descent of the swivel arm.
Il est également possible, selon une autre variante de réalisation de l'invention, de réaliser le circuit électronique sous forme d'un circuit capacitif, le contact de la tige rigide avec une main de l'opérateur ayant alors pour conséquence de provoquer une variation de capacité du circuit électronique commandant l'arrt de la descente du bras pivotant, voire sa remontée. It is also possible, according to another alternative embodiment of the invention, to produce the electronic circuit in the form of a capacitive circuit, the contact of the rigid rod with an operator's hand then having the consequence of causing a variation capacity of the electronic circuit controlling the stopping of the descent of the pivoting arm, or even its ascent.
Enfin, le circuit de commande pourrait également être constitué par un circuit hydraulique ou pneumatique, interrompant la descente du bras, dès que la tige rigide est soumise à une traction. Finally, the control circuit could also be constituted by a hydraulic or pneumatic circuit, interrupting the descent of the arm, as soon as the rigid rod is subjected to traction.
Grâce à l'invention, il est possible de réaliser une protection efficace de l'opérateur servant une presse à découper à bras pivotant, sans le contraindre à effectuer des mouvements inutiles ralentissant son travail. Thanks to the invention, it is possible to provide effective protection for the operator serving a cutting press with pivoting arm, without forcing him to make unnecessary movements slowing down his work.
Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et représenté. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments, ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention. Of course, the invention is not limited to the embodiment described and shown. Modifications remain possible, in particular from the point of view of the constitution of the various elements, or by substitution of technical equivalents, without thereby departing from the scope of protection of the invention.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7916322A FR2459087A1 (en) | 1979-06-14 | 1979-06-14 | Press safety cut=out device - uses sprung bar to operate switches carried by pivoted press arm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7916322A FR2459087A1 (en) | 1979-06-14 | 1979-06-14 | Press safety cut=out device - uses sprung bar to operate switches carried by pivoted press arm |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2459087A1 true FR2459087A1 (en) | 1981-01-09 |
FR2459087B1 FR2459087B1 (en) | 1983-03-25 |
Family
ID=9227063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7916322A Granted FR2459087A1 (en) | 1979-06-14 | 1979-06-14 | Press safety cut=out device - uses sprung bar to operate switches carried by pivoted press arm |
Country Status (1)
Country | Link |
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FR (1) | FR2459087A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2583137A1 (en) * | 1985-06-06 | 1986-12-12 | Yoshida Kogyo Kk | SAFETY DEVICE FOR A COVER THAT CAN BE OPENED AND CLOSED AUTOMATICALLY |
EP0493907A1 (en) * | 1990-12-13 | 1992-07-08 | DVSG Engineering und Patentverwaltungs GmbH | Cutting press having movable cutting head |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2049990A (en) * | 1934-11-05 | 1936-08-04 | Luella B Armstrong | Safety guard for foot presses |
CH279018A (en) * | 1950-03-09 | 1951-11-15 | Oetiker Hans | Device on the punching machine to protect a worker operating the punching machine. |
FR1461572A (en) * | 1965-10-25 | 1966-02-25 | Buhler Freres | Electronic automatic safety and protection device |
GB1393292A (en) * | 1972-03-24 | 1975-05-07 | Huwood Ltd | Safety devices in combination with machine tools |
FR2251772A1 (en) * | 1973-11-19 | 1975-06-13 | Usm Corp | |
FR2305681A1 (en) * | 1975-03-27 | 1976-10-22 | Guilliet Ets | Electrical safety control for guillotine clamps - has insulated metallic clamp insert which senses skin contact to reverse clamp drive |
-
1979
- 1979-06-14 FR FR7916322A patent/FR2459087A1/en active Granted
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2049990A (en) * | 1934-11-05 | 1936-08-04 | Luella B Armstrong | Safety guard for foot presses |
CH279018A (en) * | 1950-03-09 | 1951-11-15 | Oetiker Hans | Device on the punching machine to protect a worker operating the punching machine. |
FR1461572A (en) * | 1965-10-25 | 1966-02-25 | Buhler Freres | Electronic automatic safety and protection device |
GB1393292A (en) * | 1972-03-24 | 1975-05-07 | Huwood Ltd | Safety devices in combination with machine tools |
FR2251772A1 (en) * | 1973-11-19 | 1975-06-13 | Usm Corp | |
FR2305681A1 (en) * | 1975-03-27 | 1976-10-22 | Guilliet Ets | Electrical safety control for guillotine clamps - has insulated metallic clamp insert which senses skin contact to reverse clamp drive |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2583137A1 (en) * | 1985-06-06 | 1986-12-12 | Yoshida Kogyo Kk | SAFETY DEVICE FOR A COVER THAT CAN BE OPENED AND CLOSED AUTOMATICALLY |
EP0493907A1 (en) * | 1990-12-13 | 1992-07-08 | DVSG Engineering und Patentverwaltungs GmbH | Cutting press having movable cutting head |
Also Published As
Publication number | Publication date |
---|---|
FR2459087B1 (en) | 1983-03-25 |
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ST | Notification of lapse |