EP1146528B1 - Electrical switch mat with device for static current monitoring - Google Patents

Electrical switch mat with device for static current monitoring Download PDF

Info

Publication number
EP1146528B1
EP1146528B1 EP01106720A EP01106720A EP1146528B1 EP 1146528 B1 EP1146528 B1 EP 1146528B1 EP 01106720 A EP01106720 A EP 01106720A EP 01106720 A EP01106720 A EP 01106720A EP 1146528 B1 EP1146528 B1 EP 1146528B1
Authority
EP
European Patent Office
Prior art keywords
contact mat
plates
current monitoring
quiescent current
intermediate layer
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.)
Expired - Lifetime
Application number
EP01106720A
Other languages
German (de)
French (fr)
Other versions
EP1146528A2 (en
EP1146528A3 (en
Inventor
Karlheinz Beckhausen
Jürgen Menz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gelbau & Co KG GmbH
Original Assignee
Gelbau & Co KG GmbH
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 Gelbau & Co KG GmbH filed Critical Gelbau & Co KG GmbH
Publication of EP1146528A2 publication Critical patent/EP1146528A2/en
Publication of EP1146528A3 publication Critical patent/EP1146528A3/en
Application granted granted Critical
Publication of EP1146528B1 publication Critical patent/EP1146528B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
    • H01H3/141—Cushion or mat switches

Definitions

  • the invention relates to a device for closed-circuit current monitoring with an electrical contact mat with at least two in the quiescent current with spaced-apart plates according to the features of the preamble of claim 1.
  • Such contact mats find various applications as safety devices, as warning devices, possibly also as burglar alarms.
  • EP-0 395 784 It is also known (EP-0 395 784 ) produce the plates of rubber, plastic or the like and provided with spacers.
  • the spacers are designed as knobs, strips or strips and made in one piece with a plate. This results in plates that are expensive and therefore expensive to manufacture, especially since the plate with spacers must be designed so that the spacer is not conductive, the plate but conductive.
  • the electrically conductive surfaces comprise a braid, a woven or knitted fabric, which are conductive.
  • the distance-giving device has loop-like threads which are attached either to both surfaces or to a surface. It is also an elastic intermediate layer between the conductive surfaces, wherein the contacting takes place after compression of the elastic intermediate layer and the evaluation device is supplied, wherein the evaluation device has an ohmic or capacitive termination.
  • the invention has for its object to overcome the disadvantages of the device for quiescent current monitoring with an electrical contact mat and to create a contact mat that is simple and inexpensive to manufacture and even with small forces sufficiently safe response.
  • the spacers form a substantially inelastic intermediate layer which has openings of such a size that the inner surfaces of the plate contact one another under pressure, the plates being formed as thin, preferably flexible and elastic switching elements.
  • the plates preferably have a thickness of 2.5 mm, wherein the intermediate layer, which is preferably formed as a mesh or perforated film made of plastic or cotton, has a thickness of 0.5 mm, wherein the openings in the intermediate layer in a mesh fabric mesh size of about 5 mm.
  • the plates preferably have a Shore hardness of 50 to 65.
  • the plates have knobs or other elevations which are arranged at a distance from one another on their surface facing away from the intermediate layer. As a result, the contact ability is increased, especially when the load is applied more flat than punctiform.
  • a contact mat can be produced by simple means which already forms a unit in itself.
  • an adhesive tape may be used as the enclosure.
  • the proposed contact mat is suitable for forming a bumper or other safety switching elements with a large follow-up distance, which then connect to the contact mat transmission elements which are attached to a support element, wherein also the side facing away from the transmission elements of the support element an elastic upper body, preferably made of foam is.
  • the support member is articulated movable perpendicular to the contact mat and designed to be substantially rigid so that forces on the elastic upper body to trigger a contact of the contact mat.
  • the transmission elements are formed on the contact mat facing the end so that they form a small transfer surface, which in Range of 10 mm 2 lies. If several transmission elements, eg. B. arranged in several rows, in particular oblique forces can lead to the elastic upper body for safe release of the contact mat. Due to the number and arrangement of the transmission elements, therefore, the switching trip can be varied.
  • the contact mat and the support member may be housed in a frame, the frame enclosing these two elements and holds against each other with an edge.
  • the proposed contact mat is also preferably suitable for forming a safety edge, wherein then the contact mat is formed as a contact strip to which a support bar connects by means of transmission elements, which is articulated perpendicular to the contact strip movable.
  • the structure is similar to that of the bumpers, although this is not primarily about a large caster, but about a special type of safety edge.
  • the transmission elements may be formed integrally with the support strip, wherein the support strip should have a certain flexibility, so that a point load causes a contact release.
  • the proposed contact mat can also be bent like a bead and attached at its two ends to a machine, to a roller shutter or the like and be designed as a safety contact rail, wherein a pressure on the outer jacket of the bead-like contact mat triggers a switching pulse.
  • the plates forming the switch of a tactile sensor are connected to an electronic evaluation unit which has at least one threshold value switch and one switching stage. This makes it possible to realize a compact evaluation unit which, in addition to detecting an obstacle by means of the tactile sensor, also effects the evaluation by means of the threshold switch and the triggering of a switching operation by means of a switching stage.
  • FIG. 1 is generally designated 2 a contact mat having at its periphery a cutting line.
  • the contact mat 2 has plates 2a and 2b, which are made of rubber or polymers and are electrically conductive by the addition of conductive substances, such as carbon black, graphite, metal powder or the like.
  • electrical lines 15 and 16 are connected, leading to a tactile sensor, so that the mat is part of a device for closed-circuit monitoring.
  • the plates 2a and 2b have a thickness of about 2.5 mm and are resilient.
  • an intermediate layer is designated, which is substantially inelastic and made of non-conductive material, preferably a mesh.
  • the netting has, like FIG. 1 can be seen, through openings, so that under pressure, for example, the plate 2b, the inner surface of this plate through the mesh plate 2a can touch and thus acts as an electrical switch for the device for quiescent current monitoring.
  • the mesh size of the mesh fabric is preferably about 5 mm.
  • the thickness of the fabric is about 0.5 mm.
  • the netting can for example be made self-adhesive on both sides, so that after compression of the plates 2a and 2b, these are fastened to one another via the netting or the intermediate layer 2c are.
  • the edges can be subsequently enclosed by means of an adhesive tape, so that the contact mat 2 is protected against the ingress of dirt and the like.
  • the contact mat 2 can still be wrapped in a work mat, not shown, so that a mat is formed, which can be run over by wheels and has increased strength and protection.
  • FIG. 2 is the contact mat 2 in turn composed of the plates 2a and 2b and the intermediate layer 2c on a solid surface 17, for example, supported on a machine part or on a vehicle.
  • an elastic upper body 18 is arranged, which is fastened to a support element 19, which in turn is in operative connection by means of transmission elements 20 and 21 with the contact mat 2.
  • the elastic upper body 18 encounters a resistance, a force is also exerted on the support element 19 which transmits this force to the plate 2b via the transmission elements 20 and / or 21, thereby contacting the plate 2b with the plate 2a and thereby the mat acts as a switch in conjunction with the quiescent current monitoring device and triggers a switching pulse that results in a warning signal or a shutdown of the vehicle or machines and the like.
  • the elastic upper body is designed spatially so large and so elastic that the time between the switching pulse and the stoppage of the machine or the vehicle to a distance of the elastic compliance of the upper body 18 fits, so that the machine or the vehicle comes to a standstill, without causing any damage.
  • the support member 19 must be opposite to the mat parallel to the plane of the FIG.
  • the support member may therefore be suspended, for example, pendulum or radially supported with the contact mat in a frame and in the plane of the drawing FIG. 2 be movable so that the support member and the contact mat can not move against each other, but can be compressed.
  • the switching triggering and the reaction time and force to trigger the switching pulse of the contact mat can be changed.
  • the switching triggering and the reaction time and force to trigger the switching pulse of the contact mat can be changed.
  • the switching triggering and the reaction time and force to trigger the switching pulse of the contact mat can be changed.
  • the transmission elements and oblique forces can trigger a switching pulse on the elastic upper body.

Landscapes

  • Push-Button Switches (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

Electrical contact mat (2) with at least two plates (2a, 2b) arranged at a spacing from each other in the at-rest condition, which plates are fabricated in particular from rubber or polymers and made electrically conductive by the admixture of conductive substances such as carbon black, graphite, metal powder and the like, the spacing being established by one or more nonconductive spacers, and with a device for closed-circuit protection, which is operatively connected with the plates (2a, 2b), the spacers being designed as a substantially inelastic interlayer (2c), which has openings of such size that the inner surfaces of the plates (2a, 2b) make mutual contact when the contact mat (2) is under compressive load and thus form the switch of a tactile sensor (1) of the device for closed-circuit protection, the sensor (1) having an electrical connection (3) in parallel with the contact mat (2).

Description

Die Erfindung betrifft eine Vorrichtung zur Ruhestromüberwachung mit einer elektrischen Kontaktmatte mit zumindest zwei im Ruhestrom mit Abstand zueinander angeordneten Platten gemäß den Merkmalen des Oberbegriffs des Patentanspruchs 1.The invention relates to a device for closed-circuit current monitoring with an electrical contact mat with at least two in the quiescent current with spaced-apart plates according to the features of the preamble of claim 1.

Derartige Kontaktmatten finden verschiedenartige Anwendungen als Sicherheitseinrichtungen, als Warneinrichtungen, ggf. auch als Einbruchsicherungen.Such contact mats find various applications as safety devices, as warning devices, possibly also as burglar alarms.

Es ist bekannt ( EP- 0 109 159 ) die Platten einer elektrischen Kontaktmatte aus Metall herzustellen. Derartige Kontaktmatten sind möglicherweise für einen rauen Einsatz mit großen Schaltkräften geeignet, sie sind aber nicht vorteilhaft, wenn es darum geht, dass auch kleinere punktförmige Lasten einen Kontakt auslösen sollen. Des Weiteren sind sie nicht anpassungsfähig an unebene Flächen, Krümmungen und dergleichen.It is known ( EP-0 109 159 ) to produce the plates of an electrical contact mat made of metal. Such contact mats may be suitable for harsh use with large switching forces, but they are not advantageous when it comes to the fact that even smaller point loads should trigger contact. Furthermore, they are not adaptable to uneven surfaces, bends and the like.

Es ist weiterhin bekannt ( EP- 0 395 784 ) die Platten aus Gummi, Kunststoff oder dergleichen herzustellen und mit Distanzhaltern zu versehen. Die Distanzhalter sind als Noppen, Streifen oder Leisten ausgebildet und einstückig mit einer Platte hergestellt. Dadurch ergeben sich Platten, die aufwendig und damit teuer in der Herstellung sind, zumal die Platte mit Distanzhaltern so ausgebildet sein muss, dass die Distanzhalter nicht leitend, die Platte aber leitend ist.It is also known ( EP-0 395 784 ) produce the plates of rubber, plastic or the like and provided with spacers. The spacers are designed as knobs, strips or strips and made in one piece with a plate. This results in plates that are expensive and therefore expensive to manufacture, especially since the plate with spacers must be designed so that the spacer is not conductive, the plate but conductive.

Es ist noch bekannt ( DE- 195 10 617 A1 ), zwei einander zugeordnete, zumindest teilweise elektrisch leitende Flächen einer Kontaktmatte vorzusehen, wobei zwischen den Flächen eine Distanz bildende Einrichtung angeordnet ist und die Flächen nach Zusammendrücken der Distanz gebenden Einrichtung um einen vorgebbaren Wert eine von einer Auswerteeinrichtung auswertbare elektrische Verbindung herstellen. Die elektrisch leitenden Flächen weisen ein Geflecht, ein Gewebe oder ein Gewirk auf, die leitend sind. Die Distanz gebende Einrichtung weist schlaufenartige Fäden auf, die entweder an beiden Flächen oder an einer Fläche befestigt sind. Es handelt sich auch hier um eine elastische Zwischenlage zwischen den leitenden Flächen, wobei nach Zusammendrücken der elastischen Zwischenlage die Kontaktierung erfolgt und der Auswerteeinrichtung zugeführt wird, wobei die Auswerteeinrichtung einen Ohm'schen oder kapazitiven Abschluss aufweist.It is still known ( DE-195 10 617 A1 ), two mutually associated, at least partially provide electrically conductive surfaces of a contact mat, wherein between the surfaces of a distance-forming device is arranged and the surfaces after compressing the distance-giving device by a predetermined value produce an evaluable by an evaluation electrical connection. The electrically conductive surfaces comprise a braid, a woven or knitted fabric, which are conductive. The distance-giving device has loop-like threads which are attached either to both surfaces or to a surface. It is also an elastic intermediate layer between the conductive surfaces, wherein the contacting takes place after compression of the elastic intermediate layer and the evaluation device is supplied, wherein the evaluation device has an ohmic or capacitive termination.

Es ist weiterhin bekannt, eine elektrische Schalteinrichtung an sicherheitstechnischen Einrichtungen vorzusehen, um z. B. eine Maschine abzuschalten oder eine Warneinrichtung zu betätigen, wenn ein Schalter einen Schaltimpuls auslöst. Um Leitungsbrüche, Kurzschlüsse oder dergleichen zu erfassen, wird eine so genannte Ruhestromüberwachung durchgeführt. Dabei weist ein taktiler Sensor neben der Schalteinrichtung auch einen elektrischen Abschluss auf, wobei dieser elektrische Abschluss in einem Ruhestromkreis liegt. Durch diesen elektrischen Abschluss fließt permanent ein Ruhestrom, der, wenn kein Schaltimpuls vorliegt, einen konstanten Wert hat. Sollte plötzlich ein Kurzschluss oder eine Leitungsunterbrechung auftreten, wird dies durch Änderung des konstanten Ruhestroms erfasst. Ebenso verändert sich der Ruhestrom, wenn der Schalter den elektrischen Abschluss kurzschließt, so dass durch diese in ihrer Größe bekannte Änderung des Ruhestromes ein Schaltvorgang ausgelöst werden kann.It is also known to provide an electrical switching device to safety equipment to z. B. shut down a machine or to operate a warning device when a switch triggers a switching pulse. To detect wire breaks, short circuits or the like, a so-called closed-circuit monitoring is performed. In this case, a tactile sensor in addition to the switching device on an electrical termination, said electrical termination is in a closed circuit. Through this electrical circuit permanently flows a quiescent current, which, if no switching pulse is present, has a constant value. If suddenly a short circuit or an open circuit occurs, this is detected by changing the constant quiescent current. Likewise, the quiescent current changes when the switch shorts the electrical termination, so that by this known in size change in the quiescent current, a switching operation can be triggered.

Der Erfindung liegt die Aufgabe zugrunde, die Nachteile der Vorrichtung zur Ruhestromüberwachung mit einer elektrischen Kontaktmatte zu beheben und eine Kontaktmatte zu schaffen, die einfach und kostengünstig in der Herstellung ist und bereits bei kleinen Kräften hinreichend sicher reagiert.The invention has for its object to overcome the disadvantages of the device for quiescent current monitoring with an electrical contact mat and to create a contact mat that is simple and inexpensive to manufacture and even with small forces sufficiently safe response.

Die Aufgabe der Erfindung wird durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.The object of the invention is solved by the characterizing features of claim 1.

Erfindungsgemäß bilden die Distanzhalter eine im Wesentlichen unelastische Zwischenlage, die Öffnungen solcher Größe aufweist, dass die Innenflächen der Platte bei Druckbelastung sich gegenseitig berühren, wobei die Platten als dünne, vorzugsweise biegsame und elastische Schaltelemente ausgebildet sind. Die Platten haben vorzugsweise eine Stärke von 2,5 mm, wobei die Zwischenlage, die vorzugsweise als Netzgewebe oder gelochte Folie aus Kunststoff oder Baumwolle ausgebildet ist, eine Stärke von 0,5 mm hat, wobei die Öffnungen in der Zwischenlage bei einem Netzgewebe eine Maschengröße von ca. 5 mm haben. Die Platten haben vorzugsweise eine Shore-Härte von 50 bis 65. Erfindungsgemäß wird noch vorgeschlagen, dass die Platten an ihren der Zwischenlage abgewandten Oberfläche Noppen oder sonstige Erhebungen, die mit Abstand zueinander angeordnet sind, aufweisen. Dadurch wird die Kontaktfähigkeit erhöht, insbesondere auch dann, wenn die Last mehr flächig als punktförmig aufgebracht wird.According to the invention, the spacers form a substantially inelastic intermediate layer which has openings of such a size that the inner surfaces of the plate contact one another under pressure, the plates being formed as thin, preferably flexible and elastic switching elements. The plates preferably have a thickness of 2.5 mm, wherein the intermediate layer, which is preferably formed as a mesh or perforated film made of plastic or cotton, has a thickness of 0.5 mm, wherein the openings in the intermediate layer in a mesh fabric mesh size of about 5 mm. The plates preferably have a Shore hardness of 50 to 65. According to the invention, it is also proposed that the plates have knobs or other elevations which are arranged at a distance from one another on their surface facing away from the intermediate layer. As a result, the contact ability is increased, especially when the load is applied more flat than punctiform.

Wird die Zwischenlage, wie weiterhin vorgeschlagen, beidseitig klebend ausgeführt, so kann mit einfachen Mitteln eine Kontaktmatte hergestellt werden, die in sich schon eine Einheit bildet. Zur Verbesserung der Haltbarkeit kann auch z. B. ein Klebeband als Einfassung verwendet werden.If the intermediate layer, as further proposed, is adhesive on both sides, a contact mat can be produced by simple means which already forms a unit in itself. To improve the durability can also z. For example, an adhesive tape may be used as the enclosure.

Erfindungsgemäß eignet sich die vorgeschlagene Kontaktmatte zur Bildung eines Bumpers oder sonstiger Sicherheitsschaltelemente mit großem Nachlaufweg, wobei sich dann an die Kontaktmatte Übertragungselemente anschließen, die an einem Stützelement befestigt sind, wobei auch der den Übertragungselementen abgewandten Seite des Stützelements ein elastischer Oberkörper, vorzugsweise aus Schaumstoff vorgesehen ist. Das Stützelement ist senkrecht zur Kontaktmatte beweglich angelenkt und im Wesentlichen starr ausgeführt, damit Kräfte auf den elastischen Oberkörper zur Auslösung eines Kontakts der Kontaktmatte führen. Die Übertragungselemente sind dabei an dem der Kontaktmatte zugewandte Ende so ausgebildet, dass sie eine kleine Übertragungsfläche bilden, die im Bereich von 10 mm2 liegt. Werden mehrere Übertragungselemente, z. B. in mehreren Reihen angeordnet, so können insbesondere auch schräge Kräfte auf den elastischen Oberkörper zur sicheren Auslösung der Kontaktmatte führen. Durch die Anzahl und Anordnung der Übertragungselemente kann daher die Schaltauslösung variiert werden.According to the invention, the proposed contact mat is suitable for forming a bumper or other safety switching elements with a large follow-up distance, which then connect to the contact mat transmission elements which are attached to a support element, wherein also the side facing away from the transmission elements of the support element an elastic upper body, preferably made of foam is. The support member is articulated movable perpendicular to the contact mat and designed to be substantially rigid so that forces on the elastic upper body to trigger a contact of the contact mat. The transmission elements are formed on the contact mat facing the end so that they form a small transfer surface, which in Range of 10 mm 2 lies. If several transmission elements, eg. B. arranged in several rows, in particular oblique forces can lead to the elastic upper body for safe release of the contact mat. Due to the number and arrangement of the transmission elements, therefore, the switching trip can be varied.

Um eine senkrecht zur Kontaktmatte bewegliche Anlenkung des Stützelements mit elastischem Oberkörper zur Kontaktmatte zu gewährleisten, können die Kontaktmatte und das Stützelement in einem Rahmen untergebracht sein, wobei der Rahmen diese beiden Elemente umschließt und mit einem Rand gegeneinander festhält.In order to ensure a perpendicular to the contact mat articulation of the support member with elastic upper body to the contact mat, the contact mat and the support member may be housed in a frame, the frame enclosing these two elements and holds against each other with an edge.

Die vorgeschlagene Kontaktmatte eignet sich auch vorzugsweise zur Bildung einer Sicherheitsschaltleiste, wobei dann die Kontaktmatte als Kontaktstreifen ausgebildet ist, an die sich mittels Übertragungselementen eine Stützleiste anschließt, die senkrecht zum Kontaktstreifen beweglich angelenkt ist. Der Aufbau ist ähnlich wie der des Bumpers, wobei es hier nicht primär um einen großen Nachlauf, sondern um eine besondere Art einer Sicherheitsschaltleiste geht. Die Übertragungselemente können einstückig mit der Stützleiste ausgebildet sein, wobei die Stützleiste eine gewisse Flexibilität aufweisen sollte, damit auch eine Punktlast eine Kontaktauslösung bewirkt.The proposed contact mat is also preferably suitable for forming a safety edge, wherein then the contact mat is formed as a contact strip to which a support bar connects by means of transmission elements, which is articulated perpendicular to the contact strip movable. The structure is similar to that of the bumpers, although this is not primarily about a large caster, but about a special type of safety edge. The transmission elements may be formed integrally with the support strip, wherein the support strip should have a certain flexibility, so that a point load causes a contact release.

Die vorgeschlagene Kontaktmatte kann auch wulstartig gebogen und an ihren beiden Enden an einer Maschine, an einem Rolltor oder dergleichen befestigt sein und als Sicherheitskontaktschiene ausgebildet sein, wobei ein Druck auf den Außenmantel der wulstartig gebogenen Kontaktmatte einen Schaltimpuls auslöst.The proposed contact mat can also be bent like a bead and attached at its two ends to a machine, to a roller shutter or the like and be designed as a safety contact rail, wherein a pressure on the outer jacket of the bead-like contact mat triggers a switching pulse.

Die den Schalter eines taktilen Sensors bildenden Platten sind an eine elektronische Auswerteeinheit angeschlossen, die zumindest einen Schwellwertschalter sowie eine Schaltstufe aufweist. Dadurch lässt sich eine kompakte Auswerteeinheit realisieren, die neben Erfassung eines Hindernisses mittels des taktilen Sensors auch die Auswertung mittels des Schwellwertschalters und die Auslösung eines Schaltvorgangs mittels einer Schaltstufe bewirkt.The plates forming the switch of a tactile sensor are connected to an electronic evaluation unit which has at least one threshold value switch and one switching stage. This makes it possible to realize a compact evaluation unit which, in addition to detecting an obstacle by means of the tactile sensor, also effects the evaluation by means of the threshold switch and the triggering of a switching operation by means of a switching stage.

Zur weiteren Erläuterung der Erfindung wird auf die Zeichnungen verwiesen, in denen Ausführungsbeispiele der Erfindung vereinfacht dargestellt sind.For further explanation of the invention reference is made to the drawings, in which embodiments of the invention are shown in simplified form.

Es zeigen:

Figur 1:
eine Draufsicht auf eine erfindungemäße Kontaktmatte, wobei die obere Platte geschnitten ist, um den Blick auf die Zwischenlage und die untere Platte freizugeben und
Figur 2:
eine Seitenansicht auf eine elektrische Kontaktmatte mit im Abstand dazu angeordnetem Stützelement mit einem elastischen Oberkörper.
Show it:
FIG. 1:
a plan view of a erfindungemäße contact mat, wherein the upper plate is cut to release the view of the intermediate layer and the lower plate and
FIG. 2:
a side view of an electrical contact mat with spaced support element with an elastic upper body.

In Figur 1 ist mit 2 allgemein eine Kontaktmatte bezeichnet, die an ihrem Umfang eine Schnittlinie aufweist. Dies bedeutet, dass die Matte in ihren Abmessungen beliebig sein kann und dass es sich bei Figur 1 nur um einen Ausschnitt handelt, an dem der Aufbau der Kontaktmatte 2 ersichtlich ist. Die Kontaktmatte 2 weist Platten 2a und 2b auf, die aus Gummi oder Polymeren hergestellt sind und durch Beimischung von leitenden Stoffen, wie Russ, Graphit, Metallpulver oder dergleichen elektrisch leitend sind. An den Platten 2a und 2b sind elektrische Leitungen 15 und 16 angeschlossen, die zu einem taktilen Sensor führen, so dass die Matte Bestandteil einer Vorrichtung zur Ruhestromüberwachung ist. Die Platten 2a und 2b haben eine Stärke von etwa 2,5 mm und sind nachgiebig ausgebildet. Mit 2c ist eine Zwischenlage bezeichnet, die im Wesentlichen unelastisch ist und aus nicht leitendem Material, vorzugsweise einem Netzgewebe, besteht. Das Netzgewebe hat, wie Figur 1 zu entnehmen ist, durchgehende Öffnungen, so dass bei Druckbelastung beispielsweise der Platte 2b, die innere Oberfläche dieser Platte durch die Maschen die Platte 2a berühren kann und damit als elektrischer Schalter für die Vorrichtung zur Ruhestromüberwachung wirkt. Die Maschenweite des Netzgewebes beträgt vorzugsweise etwa 5 mm. Die Dicke des Gewebes ist etwa 0,5 mm. Das Netzgewebe kann beispielsweise beidseitig selbstklebend ausgeführt sein, so dass nach Zusammendrücken der Platten 2a und 2b diese über das Netzgewebe bzw. die Zwischenlage 2c gegeneinander befestigt sind. Die Ränder können nachträglich mittels eines Klebebandes eingefasst sein, so dass die Kontaktmatte 2 gegen Eindringen von Schmutz und dergleichen geschützt ist. Die Kontaktmatte 2 kann aber noch in eine nicht dargestellte Arbeitsmatte eingepackt sein, so dass eine Matte entsteht, die auch von Rädern überfahren werden kann und eine erhöhte Festigkeit bzw. Schutz aufweist.In FIG. 1 is generally designated 2 a contact mat having at its periphery a cutting line. This means that the mat can be arbitrary in its dimensions and that it is at FIG. 1 is only a section on which the structure of the contact mat 2 can be seen. The contact mat 2 has plates 2a and 2b, which are made of rubber or polymers and are electrically conductive by the addition of conductive substances, such as carbon black, graphite, metal powder or the like. On the plates 2a and 2b electrical lines 15 and 16 are connected, leading to a tactile sensor, so that the mat is part of a device for closed-circuit monitoring. The plates 2a and 2b have a thickness of about 2.5 mm and are resilient. With 2c an intermediate layer is designated, which is substantially inelastic and made of non-conductive material, preferably a mesh. The netting has, like FIG. 1 can be seen, through openings, so that under pressure, for example, the plate 2b, the inner surface of this plate through the mesh plate 2a can touch and thus acts as an electrical switch for the device for quiescent current monitoring. The mesh size of the mesh fabric is preferably about 5 mm. The thickness of the fabric is about 0.5 mm. The netting can for example be made self-adhesive on both sides, so that after compression of the plates 2a and 2b, these are fastened to one another via the netting or the intermediate layer 2c are. The edges can be subsequently enclosed by means of an adhesive tape, so that the contact mat 2 is protected against the ingress of dirt and the like. The contact mat 2 can still be wrapped in a work mat, not shown, so that a mat is formed, which can be run over by wheels and has increased strength and protection.

In Figur 2 ist die Kontaktmatte 2 wiederum zusammengesetzt aus den Platten 2a und 2b und der Zwischenlage 2c an einem festen Untergrund 17, beispielsweise an einem Maschinenteil oder an einem Fahrzeug abgestützt. Auf der dem Untergrund 17 gegenüberliegenden Seiten der Matte ist ein elastischer Oberkörper 18 angeordnet, der an einem Stützelement 19 befestigt ist, das seinerseits mittels Übertragungselementen 20 und 21 mit der Kontaktmatte 2 in Wirkverbindung steht. Tritt der elastische Oberkörper 18 auf einen Widerstand, so wird auch auf das Stützelement 19 eine Kraft ausgeübt, das diese Kraft über die Übertragungselemente 20 und/oder 21 auf die Platte 2b überträgt, wodurch eine Kontaktierung der Platte 2b mit der Platte 2a erfolgt und dadurch die Matte als Schalter in Verbindung mit der Vorrichtung zur Ruhestromüberwachung wirkt und einen Schaltimpuls auslöst, der zu einem Warnsignal oder einem Abschalten des Fahrzeuges oder der Maschinen und dergleichen führt. Der elastische Oberkörper ist dabei räumlich so groß ausgeführt und so elastisch, dass die Zeit zwischen dem Schaltimpuls und dem Stillstand der Maschine bzw. des Fahrzeuges zu einer Wegstrecke der elastischen Nachgiebigkeit des Oberkörpers 18 passt, so dass die Maschine oder das Fahrzeug zum Stillstand kommt, ohne das Schäden entstehen. Das Stützelement 19 muss sich gegenüber der Matte parallel zur Zeichnungsebene der Figur 2 frei bewegen können, um die Kräfte übertragen zu können und einen Schaltimpuls auszulösen. Das Stützelement kann daher beispielsweise pendelnd aufgehängt sein oder mit der Kontaktmatte in einem Rahmen radial abgestützt sein und in Zeichnungsebene der Figur 2 so beweglich sein, dass das Stützelement und die Kontaktmatte sich nicht gegeneinander entfernen können, wohl aber zusammengedrückt werden können.In FIG. 2 is the contact mat 2 in turn composed of the plates 2a and 2b and the intermediate layer 2c on a solid surface 17, for example, supported on a machine part or on a vehicle. On the opposite sides of the substrate 17, an elastic upper body 18 is arranged, which is fastened to a support element 19, which in turn is in operative connection by means of transmission elements 20 and 21 with the contact mat 2. If the elastic upper body 18 encounters a resistance, a force is also exerted on the support element 19 which transmits this force to the plate 2b via the transmission elements 20 and / or 21, thereby contacting the plate 2b with the plate 2a and thereby the mat acts as a switch in conjunction with the quiescent current monitoring device and triggers a switching pulse that results in a warning signal or a shutdown of the vehicle or machines and the like. The elastic upper body is designed spatially so large and so elastic that the time between the switching pulse and the stoppage of the machine or the vehicle to a distance of the elastic compliance of the upper body 18 fits, so that the machine or the vehicle comes to a standstill, without causing any damage. The support member 19 must be opposite to the mat parallel to the plane of the FIG. 2 can move freely to transmit the forces and trigger a switching pulse. The support member may therefore be suspended, for example, pendulum or radially supported with the contact mat in a frame and in the plane of the drawing FIG. 2 be movable so that the support member and the contact mat can not move against each other, but can be compressed.

Durch die Verteilung der Übertragungselemente zwischen dem Stützelement 19 und der Kontaktmatte sowie durch ihre Anzahl und durch die Größe der der Kontaktmatte zugewandten Enden der Übertragungselemente kann die Schaltauslösung und die Reaktionszeit und -kraft zur Auslösung des Schaltimpulses der Kontaktmatte verändert werden. Je nach Anordnung der Übertragungselemente können auch schräge Kräfte auf den elastischen Oberkörper einen Schaltimpuls auslösen.By the distribution of the transmission elements between the support member 19 and the contact mat as well as by their number and by the size of the contact mat facing the ends of the transmission elements, the switching triggering and the reaction time and force to trigger the switching pulse of the contact mat can be changed. Depending on the arrangement of the transmission elements and oblique forces can trigger a switching pulse on the elastic upper body.

Claims (5)

  1. Apparatus for quiescent current monitoring having an electrical contact mat (2) with at least two plates (2a, 2b) which are arranged at a distance from one another in the rest state and have electrically conductive surfaces, wherein the distance is produced by non-conductive spacers, wherein the inner surfaces of the plates (2a, 2b) touch one another when pressure is applied to the contact mat (2), thus forming the switch of a tactile sensor of the apparatus for quiescent current monitoring, and wherein the sensor has an electrical termination connected in parallel with the contact mat,
    characterized in that the spacers are in the form of an essentially non-elastic intermediate layer (2c), and the openings are of such a size that the inner surfaces of the plates (2a, 2b) touch one another when pressure is applied to the contact mat (2),
    in that the plates (2a, 2b) are in the form of thin, flexible and elastic switching elements, are composed of rubber or polymers and are made electrically conductive by the admixing of conductive substances, such as soot, graphite, metal powder and the like, and in that the intermediate layer is in the form of a non-conductive network mesh, preferably composed of plastic or cotton.
  2. Apparatus for quiescent current monitoring having an electrical contact mat according to Claim 1,
    characterized in that the intermediate layer (2c) is adhesive on both sides.
  3. Apparatus for quiescent current monitoring having an electrical contact mat according to one of Claims 1 or 2,
    characterized in that, on their surfaces facing away from the intermediate layer (2c), the plates (2a, 2b) have studs or other projections which are arranged at a distance from one another.
  4. Apparatus for quiescent current monitoring having an electrical contact mat according to one of the preceding claims,
    characterized in that transmission elements (20, 21), which are attached at a supporting element (19), are connected to the contact mat (2) in order to form a bumper or some other safety switching element with a large deflection movement,
    in that the supporting element (19) is fitted with an elastic upper body (18), preferably composed of foam material, on the side facing away from the transmission elements (20, 21), and
    in that the supporting element (19) is articulated such that it can move at right angles to the contact mat.
  5. Apparatus for quiescent current monitoring having an electrical contact mat according to one of the preceding claims,
    characterized in that the contact mat (2) is in the form of a contact strip, to which transmission elements which are attached to a supporting strip are connected, in order to form a safety switching strip or some other safety switching element, and
    in that the supporting strip is articulated such that it can move at right angles to the contact strip.
EP01106720A 2000-04-14 2001-03-16 Electrical switch mat with device for static current monitoring Expired - Lifetime EP1146528B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10018475A DE10018475A1 (en) 2000-04-14 2000-04-14 Electrical contact mat with device for quiescent current monitoring
DE10018475 2000-04-14

Publications (3)

Publication Number Publication Date
EP1146528A2 EP1146528A2 (en) 2001-10-17
EP1146528A3 EP1146528A3 (en) 2004-04-28
EP1146528B1 true EP1146528B1 (en) 2010-07-14

Family

ID=7638706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01106720A Expired - Lifetime EP1146528B1 (en) 2000-04-14 2001-03-16 Electrical switch mat with device for static current monitoring

Country Status (5)

Country Link
US (1) US6486424B2 (en)
EP (1) EP1146528B1 (en)
AT (1) ATE474320T1 (en)
DE (2) DE10018475A1 (en)
ES (1) ES2348220T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0204838D0 (en) * 2002-03-01 2002-04-17 Tapeswitch Ltd Safety monitor for machinery
US8016037B2 (en) * 2004-04-15 2011-09-13 National Oilwell Varco, L.P. Drilling rigs with apparatus identification systems and methods
DE102008006323B4 (en) * 2007-02-27 2014-04-30 Eichenauer Heizelemente Gmbh & Co. Kg Reductant supply system for an exhaust gas purification catalyst of an internal combustion engine and plug connection for connecting heated liquid lines

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1703497U (en) * 1955-03-15 1955-07-28 Erich Grusa CONTACT RUNNER FOR AREA CONTACT.
FR2033446A5 (en) * 1969-02-25 1970-12-04 Tubest Sa
DE2101193A1 (en) * 1971-01-12 1972-08-03 Ver Baubeschlag Gretsch Co Contact mat
US4324962A (en) * 1980-10-14 1982-04-13 Oak Industries Inc. Membrane switch having a puff ink spacer
GB2128031B (en) * 1982-09-30 1986-06-25 Minnesota Mining & Mfg Pressure sensitive switchmats
JPS59118040U (en) * 1983-01-31 1984-08-09 アルプス電気株式会社 input device
DE3528382A1 (en) * 1985-08-07 1987-02-12 Huebner Gummi & Kunststoff CONTACT MAT
EP0395784B1 (en) * 1989-05-05 1995-02-15 Karlheinz Beckhausen Electrical switch mat
DE3915931A1 (en) * 1989-05-16 1990-11-22 Mayser Gmbh & Co SECURITY BUFFER
DE4323542C2 (en) * 1993-07-14 1996-12-19 Hans Juergen Hennig Electrical switch
US5588673A (en) * 1994-02-01 1996-12-31 The Bergquist Company Membrane switch for use over a steering wheel airbag assembly
DE4421447A1 (en) * 1994-06-22 1996-01-04 Hans Juergen Hennig Electric switch e.g. for computer technology
DE19510617A1 (en) * 1995-03-23 1996-09-26 Leon Helma Christina Flexible contact mat e.g. for pressure sensitive switching device
US5695859A (en) * 1995-04-27 1997-12-09 Burgess; Lester E. Pressure activated switching device
US5642901A (en) * 1995-05-26 1997-07-01 Larry J. Winget Thermoplastic air bag cover having a membrane switch with enhanced activation
JP3345425B2 (en) * 1995-06-29 2002-11-18 日本信号株式会社 Mat sensor
US5639114A (en) * 1995-11-14 1997-06-17 Trw Inc. Steering wheel with air bag cover and horn switch
DE19946039A1 (en) * 1999-09-25 2001-03-29 Beckhausen Karlheinz Device for monitoring the quiescent current of a safety-critical device

Also Published As

Publication number Publication date
EP1146528A2 (en) 2001-10-17
DE10018475A1 (en) 2001-10-18
ATE474320T1 (en) 2010-07-15
ES2348220T3 (en) 2010-12-01
DE50115548D1 (en) 2010-08-26
US20010037932A1 (en) 2001-11-08
US6486424B2 (en) 2002-11-26
EP1146528A3 (en) 2004-04-28

Similar Documents

Publication Publication Date Title
DE102012105411B4 (en) Use of a signature resistor element in a backup loop
EP0663656B1 (en) Monitoring sensor
EP3399292A1 (en) Multilayer tactile sensor
DE102012100404B4 (en) collision protection
DE112018000027B4 (en) Body pressure switch, vehicle seat, vehicle and method for processing a body pressure switch
EP0398844A2 (en) Pressure sensitive mat-shaped electric switch gear
WO2007116024A1 (en) Tactile area sensor
EP1146528B1 (en) Electrical switch mat with device for static current monitoring
DE202016105266U1 (en) Electromotive furniture drive
DE4010774A1 (en) ALARM OR SIGNALING DEVICE
DE102016118430B4 (en) switch unit
EP2602069B1 (en) Anti-collision device
DE102012219024B4 (en) Housing panel module, arrangement and method with collision detection for medical devices
DE102021117216A1 (en) Vehicle comprising a battery system, method of using a vehicle
DE19754295A1 (en) Window damage detection
DE102015106226A1 (en) Checking a textile for damage
DE19801052C2 (en) Electrical switch contact mat
DE10218613A1 (en) Mechanical power detection apparatus has detection plate including measurement layers whose characteristics change, if power that is to be detected acts on measurement layers
AT504406B1 (en) MEASURING DEVICE
DE3431347C2 (en)
DE4435829A1 (en) Security switching plate triggering alarm and/or control on contact
DE102016204676A1 (en) X-ray image detector and X-ray imaging device with a collision detection unit and method for detecting a collision
DE102021122968B4 (en) Protective plate with damage detection, a battery system having this and associated damage detection method
DE102019219521B4 (en) Foam sensor and method of operating a machine
DE202017104945U1 (en) Redundant film switch device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20040901

AKX Designation fees paid

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

17Q First examination report despatched

Effective date: 20060526

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: GELBAU GMBH & CO. KG

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 50115548

Country of ref document: DE

Date of ref document: 20100826

Kind code of ref document: P

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20100714

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: R. A. EGLI & CO. PATENTANWAELTE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100714

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100714

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100714

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101015

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100714

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100714

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100714

26N No opposition filed

Effective date: 20110415

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 50115548

Country of ref document: DE

Effective date: 20110415

BERE Be: lapsed

Owner name: GELBAU G.M.B.H. & CO. KG

Effective date: 20110331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110331

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 474320

Country of ref document: AT

Kind code of ref document: T

Effective date: 20110316

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110316

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110316

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100714

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100714

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 50115548

Country of ref document: DE

Representative=s name: GOSDIN, CARSTENSEN & PARTNER PATENTANWAELTE PA, DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20200321

Year of fee payment: 20

Ref country code: SE

Payment date: 20200317

Year of fee payment: 20

Ref country code: GB

Payment date: 20200325

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20200310

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20200619

Year of fee payment: 20

Ref country code: ES

Payment date: 20200402

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 50115548

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20210315

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20210315

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20210730

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20210317