EP0258590B1 - Feed-through piece for connecting cables of an electric cooking plate - Google Patents

Feed-through piece for connecting cables of an electric cooking plate Download PDF

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Publication number
EP0258590B1
EP0258590B1 EP87110250A EP87110250A EP0258590B1 EP 0258590 B1 EP0258590 B1 EP 0258590B1 EP 87110250 A EP87110250 A EP 87110250A EP 87110250 A EP87110250 A EP 87110250A EP 0258590 B1 EP0258590 B1 EP 0258590B1
Authority
EP
European Patent Office
Prior art keywords
bushing
cover plate
hotplate
hotplate body
leads
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
EP87110250A
Other languages
German (de)
French (fr)
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EP0258590A1 (en
Inventor
Felix Schreder
Josef Krist
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Gerate Blanc und Fischer 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 EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Gerate Blanc und Fischer GmbH
Priority to AT87110250T priority Critical patent/ATE76551T1/en
Publication of EP0258590A1 publication Critical patent/EP0258590A1/en
Application granted granted Critical
Publication of EP0258590B1 publication Critical patent/EP0258590B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/70—Plates of cast metal
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates

Definitions

  • the invention relates to a bushing according to the preamble of claim 1 and a method for its attachment.
  • Feedthroughs of this type are customary in the conventional electric hotplates with hotplate bodies made of cast material and are known, for example, from DE-B-1 291 032. These lead-through pieces have a circumferential shoulder with which they are pressed by the cover plate against the underside of the embedding including the heating. As a result, they are in thermal contact with the heating and heat up relatively quickly.
  • lead-through pieces have already become known which were only held by the wires penetrating them and were not supported directly on the embedding.
  • the assembly had to be done by hand threading the grommets onto the leads and sliding them into position before threading the cover plate over the grommet and then securing it.
  • This assembly was very complex and could not be automated.
  • the object of the invention is to provide a bushing which, with comparable electrical and mechanical safety and strength, enables easier and possibly automatic assembly.
  • the bushing can first be attached to the cover plate, which can then be inserted together with the bushing with the ends of the connecting lines, which usually consist of solid wire.
  • the feed-through piece is a relatively flat, plate-shaped piece, which is preferably attached to the lid by means of bent retaining tabs, and a very substantial one Distance from the bottom of the heater. As a result, the bushing also has a relatively low thermal mass.
  • connection piece should always have direct thermal contact with the underside of the heating in order to heat up quickly and to avoid that moisture condenses on the bushing in the heating phase and impermissibly impairs electrical safety (leakage currents). It has been shown that this does not occur in the invention, which is obviously due to the plate shape with a relatively large area facing the heating compared to the thermal mass.
  • Automatic assembly can be carried out according to a preferred method according to claim 9 are automatically installed by automatically connecting and disconnecting the connecting cables after attaching the grommet to the end cover using a gripper, so that the leadthrough can be threaded together with the end cover.
  • an electric hotplate 11 is partially shown, which has a hotplate body 12 made of cast iron with an upper closed, flat cooking surface 13 and a peripheral, downward flange-like edge 14 surrounding the edge area.
  • a hotplate body 12 made of cast iron with an upper closed, flat cooking surface 13 and a peripheral, downward flange-like edge 14 surrounding the edge area.
  • heating resistors 16 consisting of wire helices 16 are arranged in spirally arranged grooves 15 in an originally pourable, compressed, electrically insulating investment compound 17. You are over the investment pins projecting pins 18 connected to leads 19 which consist of solid wires.
  • the underside of the hotplate is closed off by an end cover 20 made of deformed sheet metal, which is supported on the edge 14 and closes off an interior space 21 below the heating, which is usually annular.
  • a bushing 22 is attached, which is made of highly heat-resistant insulating material, such as steatite. It has the shape of an elongated, plate-shaped body with rounded narrow sides 23. It is supported by a circumferential shoulder 24 (FIG. 4) in the region of an opening 25 of the end cover, which has an indentation 26 that is stamped towards the hotplate body 12 at this point.
  • the lead-through piece 22 does not protrude downward over the lower edge 27 of the edge or the end cover 20 lying thereon, and the connecting wires guided through the lead-through piece 22 are still above this lower edge. This is very important for the packaging for transport.
  • the lead-through piece 22 has a plurality of, in the present example four lead-through openings 28 in the form of round or oval holes lying in a row, which run from the inner flat side 29 to the outer flat side 30 and have funnel-shaped insertion bevels 31 on their inner sides, ie facing the hotplate body 12 .
  • groove-like or groove-like depressions 32 are provided transversely to the longitudinal extent of the lead-through piece 22, in which, as shown, the connecting lines 19 which are bent on the underside of the hotplate towards the circumference are guided and are guided. This also reduces the overall height.
  • the bushing 22 On the two narrow sides 23, the bushing 22 has rectangular recesses 33, which extend from the lower flat side 30 to slightly above the height of the shoulder 24 and reach into the bushing so far that the stepped, inner part of the bushing is engaged. In these recesses 33 retaining tabs 34 of the end cover are bent and thus fix the grommet directly on the end cover, d. H. without having to rely on connecting lines, the hotplate body or the like. indirect holding means.
  • the connecting lines 19, in the present case 4 are welded to the connecting pins 18 and protrude through the through openings 28 and are then bent towards the outer edge of the hotplate.
  • the bushing 22 When installing the hotplate, the bushing 22 is first attached to the end cover 20. At the edge of the opening 25, the two retaining tabs 34 are formed, but bent outwards (below), so that the stepped part of the lead-through piece 22 can be passed freely through the opening above the shoulder. This can be done automatically by means of appropriate gripping devices. On the gripping device 35 carrying the grommet 22, which is indicated by dash-dotted lines, stamps 36 can be provided which are pushed upward after the insertion of the grommet 22 into the opening 25 and thereby flip the retaining tabs 34 so that they are in the position according to FIG 1 come and hold the bushing 22 on the end cover 20 directly in cooperation with the shoulder 24. Insertion bevels 37 facilitate the merging.
  • the thus pre-assembled unit cover 20 / bushing 22 is in turn gripped by a gripper, not shown, and brought together with the hotplate. At that point, they were still vertical connecting lines 19 standing away from the hotplate are also gripped by a gripper which aligns the four lines at their ends to one another and holds them in this aligned position.
  • the orientation corresponds to the arrangement of the feed-through openings 28, which, supported by the insertion funnel 31, can be easily and automatically brought together.
  • the end plate is fastened in the usual manner, for example by means of a central bolt which is screwed into a corresponding cast projection and the ends of the connecting lines 19 are bent into the position shown in the drawing, where they lie relatively close above the end cover 20.
  • the connecting lines 19 are so long that they extend close to or beyond the hotplate circumference. However, they can also be made so short that they protrude only slightly from the lead-through openings 28 and are welded there to other feed lines instead of being bent over. These supply lines then lie next to the connecting lines 19 on the unimpeded lower surface 30, ie on ribs which form between the depressions 32. This ensures a certain electrical safety distance between the feed lines and the end plate 20.
  • connection lines end within the hotplate edge.
  • the lead-through piece and the method for manufacturing is also ideally suited for longer connecting lines, because the ends are gripped and aligned anyway by a gripper and then after the threading and opening and pulling back of the gripper, the end cover is automatically in the correct position falls.
  • the lead-through piece 22, as described is firmly and directly attached to the end cover. It can be seen that the end piece has significantly smaller dimensions and, above all, a lower thermal mass compared to those according to the prior art, so that it is easy to get to the temperature required to rule out condensation.
  • the space between the bushing and the underside 40 of the hotplate body is free and large enough to be able to lay the rigid connecting lines unhindered. So you do not have to lay around parts of the bushing.
  • the feed-through piece can even be displaced in the direction of the hotplate body in order to create an arrangement which does not project downwards over the edge 27.
  • the bushing itself that steatite is made of the relatively expensive and difficult-to-process insulating material, is simple to design and saves material in a simply divided form.
  • the thickness of the bushing is less than a third, preferably only a fifth of the total length.

Landscapes

  • Resistance Heating (AREA)
  • Baking, Grill, Roasting (AREA)
  • Multi-Conductor Connections (AREA)
  • Electric Stoves And Ranges (AREA)
  • Insulators (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Insulated Conductors (AREA)

Abstract

A hotplate (11) has a flat, plate-like bushing (22) for connecting leads (19). The bushing (22) is directly fitted in a cover plate (20) of the hotplate (11) by means of retaining clips (34). The connecting leads (19) are threaded through the bushing, which bushing is retained in the cover plate (20). The cover plate (20), with bushing affixed is then fixed to the hotplate body. The bushing (22) is not supported on the hotplate underside (40), but is wholly supported in the cover plate (20), facilitating assembly by automated equipment.

Description

Die Erfindung betrifft ein Durchführungsstück nach dem Oberbegriff des Anspruchs 1 und ein Verfahren zu seiner Anbringung.The invention relates to a bushing according to the preamble of claim 1 and a method for its attachment.

Derartige Durchführungsstücke sind bei den üblichen Elektro-Kochplatten mit aus Gußmaterial bestehendem Kochplattenkörper üblich und beispielsweise aus der DE-B-1 291 032 bekannt. Diese Durchführungsstücke haben eine umlaufende Schulter, mit der sie von dem Abdeckblech gegen die Unterseite der die Beheizung einschließenden Einbettung gedrückt werden. Sie stehen dadurch in Wärmekontakt mit der Beheizung und heizen sich relativ schnell auf.Feedthroughs of this type are customary in the conventional electric hotplates with hotplate bodies made of cast material and are known, for example, from DE-B-1 291 032. These lead-through pieces have a circumferential shoulder with which they are pressed by the cover plate against the underside of the embedding including the heating. As a result, they are in thermal contact with the heating and heat up relatively quickly.

Andererseits sind auch schon Durchführungsstücke bekanntgeworden, die nur von den sie durchdringenden Drähten gehalten wurden und nicht unmittelbar auf der Einbettung abgestützt waren.On the other hand, lead-through pieces have already become known which were only held by the wires penetrating them and were not supported directly on the embedding.

So ist aus der DE-A1-33 01 219 und der DE-C3-26 20 004 eine Kochplatte mit einem Durchführungsstück bekanntgeworden, das sich auch mit einer an einem Flasch vorhandenen Schulter an dem Abschlußdeckel abstützt, jedoch ohne an die Unterseite der Beheizung des Kochplattenkörpers angedrückt zu werden. Es wird nur durch die Anschlußleitungen festgehalten.From DE-A1-33 01 219 and DE-C3-26 20 004, a hotplate with a feed-through piece has become known, which is also supported by a shoulder on a bottle on the end cover, but without on the underside of the heating of the Hotplate body to be pressed. It is only held by the connecting cables.

In jedem Falle mußte die Montage so vor sich gehen, daß die Durchführungsstücke auf die Leitungen von Hand aufgefädelt und in ihre Position geschoben wurden, bevor das Abdeckblech über das Durchführungsstück gefädelt und dann befestigt wurde. Diese Montage war sehr aufwendig und ließ sich nicht automatisieren.In any case, the assembly had to be done by hand threading the grommets onto the leads and sliding them into position before threading the cover plate over the grommet and then securing it. This assembly was very complex and could not be automated.

Aufgabe der Erfindung ist es, ein Durchführungsstück zu schaffen, das bei vergleichbarer elektrischer und mechanischer Sicherheit und Festigkeit eine leichtere und ggf. automatische Montage ermöglicht.The object of the invention is to provide a bushing which, with comparable electrical and mechanical safety and strength, enables easier and possibly automatic assembly.

Diese Aufgabe wird durch das Kennzeichen des Anspruchs 1 gelöst.This object is achieved by the characterizing part of claim 1.

Nunmehr kann das Durchführungsstück zuerst am Abdeckblech befestigt werden, das dann gemeinsam mit dem Durchführungsstück mit den Enden der Anschlußleitungen, die ja üblicherweise aus massivem Draht bestehen, gesteckt werden kann. Dabei ist das Durchführungsstück ein relativ flaches plattenförmiges Stück, das vorzugsweise mittels abgebogener Haltel aschen am Deckel angebracht wird und einen ganz erheblichen Abstand von der Unterseite der Beheizung hat. Dadurch hat das Durchführungsstück auch eine relativ geringe thermische Masse.Now the bushing can first be attached to the cover plate, which can then be inserted together with the bushing with the ends of the connecting lines, which usually consist of solid wire. The feed-through piece is a relatively flat, plate-shaped piece, which is preferably attached to the lid by means of bent retaining tabs, and a very substantial one Distance from the bottom of the heater. As a result, the bushing also has a relatively low thermal mass.

Bisher war angenommen worden, daß das Anschlußstück stets unmittelbaren Wärmekontakt zur Unterseite der Beheizung haben sollte, um sich schnell aufzuheizen und zu vermeiden, daß in der Aufheizphase Feuchtigkeit am Durchführungsstück kondensiert und die elektrische Sicherheit (Ableitströme) unzulässig beeinträchtigt. Es hat sich gezeigt, daß dies bei der Erfindung nicht auftritt, was offensichtlich an der Plattenform mit relativ großer der Beheizung zugewandter Fläche im Vergleich zur thermischen Masse liegt.So far it had been assumed that the connection piece should always have direct thermal contact with the underside of the heating in order to heat up quickly and to avoid that moisture condenses on the bushing in the heating phase and impermissibly impairs electrical safety (leakage currents). It has been shown that this does not occur in the invention, which is obviously due to the plate shape with a relatively large area facing the heating compared to the thermal mass.

Die automatische Montage kann nach einem bevorzugten Verfahren gemäß Anspruch 9 automatisch montiert werden, indem die Anschlußleitungen nach der Befestigung des Durchführungsstückes am Abschlußdeckel mittels eines Greifers automatisch erfaßt und ausgerichtet werden, so daß das Durchführungstück zusammen mit dem Abschlußdeckel darübergefädelt werden kann.Automatic assembly can be carried out according to a preferred method according to claim 9 are automatically installed by automatically connecting and disconnecting the connecting cables after attaching the grommet to the end cover using a gripper, so that the leadthrough can be threaded together with the end cover.

Weitere Vorteile und Merkmale der Erfindung sind in den Unteransprüchen und der nachfolgenden Beschreibung im Zusammenhang mit der Zeichnung näher erläutert, wobei einzelne Merkmale für sich allein oder in ihrer Kombination vorteilhafte Ausführungen ergeben können und auch bei anderen Anwendungen vorteilhaft eingesetz werden können.Further advantages and features of the invention are explained in more detail in the subclaims and the following description in connection with the drawing, wherein individual features alone or in combination can result in advantageous designs and can also be used advantageously in other applications.

Ein Ausführungsbeispiel ist in der Zeichnung dargestellt und wird im folgenden näher erläutert.An embodiment is shown in the drawing and is explained in more detail below.

Es zeigen:

Fig. 1
einen vertikalen Teilschnitt etwa nach der Linie I in Fig. 2,
Fig. 2
eine Unteransicht eines Teils einer Kochplatte mit Durchführungsstück,
Fig. 3
einen Schnitt durch Durchführungsstück und einen Teil des Abdeckblechs vor der Montage aneinander und
Fig. 4
einen Schnitt nach der Linie IV in Fig. 2.
Show it:
Fig. 1
a partial vertical section approximately along the line I in Fig. 2,
Fig. 2
a bottom view of part of a hotplate with feed-through piece,
Fig. 3
a section through bushing and part of the cover plate before assembly to each other and
Fig. 4
a section along the line IV in Fig. 2nd

In Fig. 1 ist eine Elektrokochplatte 11 teilweise gezeigt, die einen aus Eisenguß bestehenden Kochplattenkörper 12 mit einer oberen geschlossenen, ebenen Kochfläche 13 und einem im Randbereich umlaufenden, abwärtsgerichteten flanschartigen Rand 14 aufweist. An der Unterseite des Kochplattenkörpers 12 sind in spiralförmig angeordneten Nuten 15 aus Drahtwendeln bestehende Heizwiderstände 16 in einer ursprünglich schüttfähigen, verdichteten, elektrisch isolierenden Einbettmasse 17 angeordnet. Sie sind über aus der Einbettmasse herausragende Anschlußstifte 18 mit Anschlußleitungen 19 verbunden, die aus massiven Drähten bestehen.In Fig. 1, an electric hotplate 11 is partially shown, which has a hotplate body 12 made of cast iron with an upper closed, flat cooking surface 13 and a peripheral, downward flange-like edge 14 surrounding the edge area. On the underside of the hotplate body 12, heating resistors 16 consisting of wire helices 16 are arranged in spirally arranged grooves 15 in an originally pourable, compressed, electrically insulating investment compound 17. You are over the investment pins projecting pins 18 connected to leads 19 which consist of solid wires.

Die Unterseite der Kochplatte ist durch einen aus verformten Blech bestehenden Abschlußdeckel 20 abgeschlossen, der sich auf dem Rand 14 abstützt und einen unterhalb der Beheizung liegenden Innenraum 21 abschließt, der üblicherweise ringförmig ist.The underside of the hotplate is closed off by an end cover 20 made of deformed sheet metal, which is supported on the edge 14 and closes off an interior space 21 below the heating, which is usually annular.

An dem Abschlußblech 20 ist ein Durchführungsstück 22 befestigt, das aus hoch wärmefesten Isoliermaterial, beispielsweise Steatit. Es hat die Form eines langgestreckten, plattenförmigen Körpers mit abgerundeten Schmalseiten 23. Durch eine umlaufende Schulter 24 (Fig. 4) stützt es sich im Bereich einer Öffnung 25 des Abschlußdeckels ab, das an dieser Stelle eine zum Kochplattenkörper 12 hin eingeprägte Vertiefung 26 hat. Dadurch ragt, wie aus Fig. 1 zu erkennen ist, das Durchführungsstück 22 nicht über die untere Randkante 27 des Randes bzw. des daraufliegenden Abschlußdeckels 20 nach unten und auch die durch das Durchführungstück 22 geführten Anschlußdrähte liegen noch oberhalb dieser unteren Randkante. Das ist für die Verpackung zum Transport sehr wichtig.On the end plate 20, a bushing 22 is attached, which is made of highly heat-resistant insulating material, such as steatite. It has the shape of an elongated, plate-shaped body with rounded narrow sides 23. It is supported by a circumferential shoulder 24 (FIG. 4) in the region of an opening 25 of the end cover, which has an indentation 26 that is stamped towards the hotplate body 12 at this point. As a result, as can be seen from FIG. 1, the lead-through piece 22 does not protrude downward over the lower edge 27 of the edge or the end cover 20 lying thereon, and the connecting wires guided through the lead-through piece 22 are still above this lower edge. This is very important for the packaging for transport.

Das Durchführungsstück 22 hat mehrere, im vorliegenden Beispiel vier Durchführungsöffnungen 28 in Form von in einer Reihe liegenden runden oder ovalen Löchern, die von der inneren Flachseite 29 zur äußeren Flachseite 30 verlaufen und an ihren inneren, d. h. dem Kochplattenkörper 12 zugewandten Seiten trichterförmige Einführschrägen 31 haben. Im Bereich der Außenseiten 30 sind quer zur Längserstreckung des Durchführungstückes 22 nut- oder rillenartige Vertiefungen 32 vorgesehen, in denen, wie dargestellt, die an der Unterseite der Kochplatte zum Umfang hin abgebogenen Anschlußleitungen 19 liegen und geführt sind. Auch dadurch wird die Bauhöhe verringert.The lead-through piece 22 has a plurality of, in the present example four lead-through openings 28 in the form of round or oval holes lying in a row, which run from the inner flat side 29 to the outer flat side 30 and have funnel-shaped insertion bevels 31 on their inner sides, ie facing the hotplate body 12 . In the area of the outer sides 30, groove-like or groove-like depressions 32 are provided transversely to the longitudinal extent of the lead-through piece 22, in which, as shown, the connecting lines 19 which are bent on the underside of the hotplate towards the circumference are guided and are guided. This also reduces the overall height.

An den beiden Schmalseiten 23 hat das Durchführungsstück 22 rechteckige Ausnehmungen 33, die von der unteren Flachseite 30 bis etwas über die Höhe der Schulter 24 reichen und soweit in das Durchführungsstück hineingreifen, daß der abgesetzte, innere Teil des Durchführungsstückes hintergriffen wird. In diese Ausnehmungen 33 sind Haltelaschen 34 des Abschlußdeckels hineingebogen und legen so das Durchführungsstück direkt am Abschlußdeckel fest, d. h. ohne daß es zum Halt auf Anschlußleitungen, den Kochplattenkörper o. dgl. indirekte Halterungsmittel angewiesen wäre.On the two narrow sides 23, the bushing 22 has rectangular recesses 33, which extend from the lower flat side 30 to slightly above the height of the shoulder 24 and reach into the bushing so far that the stepped, inner part of the bushing is engaged. In these recesses 33 retaining tabs 34 of the end cover are bent and thus fix the grommet directly on the end cover, d. H. without having to rely on connecting lines, the hotplate body or the like. indirect holding means.

Die Anschlußleitungen 19, im vorliegenden Fall 4, sind mit den Anschlußstiften 18 verschweißt und ragen durch die Durchführungsöffnungen 28 hindurch und sind dann in Richtung auf den Außenrand der Kochplatte hin abgebogen.The connecting lines 19, in the present case 4, are welded to the connecting pins 18 and protrude through the through openings 28 and are then bent towards the outer edge of the hotplate.

Bei der Montage der Kochplatte wird zuerst das Durchführungsstück 22 am Abschlußdeckel 20 befestigt. Am Rand der Öffnung 25 sind die zwei Haltelaschen 34 ausgebildet, jedoch nach außen (unten) abgebogen, so daß der abgesetzte Teil des Durchführungsstückes 22 oberhalb der Schulter frei durch die Öffnung hindurchgeführt werden kann. Dies kann mittels entsprechenden Greifvorrichtungen automatisch geschehen. An der das Durchführungsstück 22 tragenden Greifvorrichtung 35, die strichpunktiert angedeutet ist, können Stempel 36 vorgesehen sein, die nach dem Einführen des Durchführungsstücks 22 in die Öffnung 25 nach oben gedrückt werden und dabei die Haltelaschen 34 so umlegen, daß sie in die Lage nach Fig. 1 kommen und im Zusammenwirken mit der Schulter 24 das Durchführungsstück 22 am Abschlußdeckel 20 direkt festhalten. Einführungsschrägen 37 erleichtern das Zusammenführen.When installing the hotplate, the bushing 22 is first attached to the end cover 20. At the edge of the opening 25, the two retaining tabs 34 are formed, but bent outwards (below), so that the stepped part of the lead-through piece 22 can be passed freely through the opening above the shoulder. This can be done automatically by means of appropriate gripping devices. On the gripping device 35 carrying the grommet 22, which is indicated by dash-dotted lines, stamps 36 can be provided which are pushed upward after the insertion of the grommet 22 into the opening 25 and thereby flip the retaining tabs 34 so that they are in the position according to FIG 1 come and hold the bushing 22 on the end cover 20 directly in cooperation with the shoulder 24. Insertion bevels 37 facilitate the merging.

Die somit vormontierte Einheit Abschlußdeckel 20/Durchführungsstück 22 wird nun ihrerseits durch einen nicht dargestellten Greifer ergriffen und mit der Kochplatte zusammengeführt. Deren zu diesem Zeitpunkt noch vertikal von der Kochplatte hinweg stehende Anschlußleitungen 19 werden dabei ebenfalls von einem Greifer erfaßt, der die vier Leitungen an ihren Enden zu einander ausrichtet und in dieser ausgerichteten Lage hält. Die Ausrichtung entspricht dabei der Anordnung der Durchführungsöffnungen 28, die so, unterstützt durch die Einführtrichter 31, leicht automatisch zusammengeführt werden können. Dann wird das Abschlußblech in üblicher Weise befestigt, beispielsweise durch einen Mittelbolzen, der in einen entsprechenden Gußvorsprung eingeschraubt wird und die Enden der Anschlußleitungen 19 werden in die in der Zeichnung dargestellte Lage umgebogen, wo sie relativ dicht über dem Abschlußdeckel 20 liegen. Sie stören so beim Transport nicht und werden vor dem Einbau der Kochplaten in einen Kochherd, wenn ein isolierendes Anschlußstück auf die Leitungen aufgebracht wird, automatisch wieder etwas von dem Abschlußblech abgehoben. Diese Bewegung wird durch die Vertiefungen 32 nicht behindert, die jedoch zu einer guten Parallelführung der Anschlußleitungen beitragen. Im Ausführungsbeispiel sind die Anschlußleitungen 19 so lang, daß sie bis nahe an den Kochplattenumfang oder darüber hinaus reichen. Man kann sie aber auch so kurz machen, daß sie nur wenig aus den Durchführungsöffnungen 28 hinausragen und dort mit anderen Zuführungsleitungen verschweißt sind, statt umgebogen zu werden. Diese Zuführungsleitungen liegen dann neben den Anschlußleitungen 19 auf der unvertieften unteren Fläche 30, d. h. auf sich zwischen den Vertiefungen 32 bildenden Rippen. Dadurch wird ein gewisser elektrischer Sicherheitsabstand zwischen den Zuführungsleitungen und dem Abschlußblech 20 sichergestellt.The thus pre-assembled unit cover 20 / bushing 22 is in turn gripped by a gripper, not shown, and brought together with the hotplate. At that point, they were still vertical connecting lines 19 standing away from the hotplate are also gripped by a gripper which aligns the four lines at their ends to one another and holds them in this aligned position. The orientation corresponds to the arrangement of the feed-through openings 28, which, supported by the insertion funnel 31, can be easily and automatically brought together. Then the end plate is fastened in the usual manner, for example by means of a central bolt which is screwed into a corresponding cast projection and the ends of the connecting lines 19 are bent into the position shown in the drawing, where they lie relatively close above the end cover 20. They do not interfere with transport and are automatically lifted off the end plate again before installing the hot plates in a cooker, if an insulating connector is applied to the lines. This movement is not hindered by the depressions 32, which, however, contribute to a good parallel routing of the connecting lines. In the exemplary embodiment, the connecting lines 19 are so long that they extend close to or beyond the hotplate circumference. However, they can also be made so short that they protrude only slightly from the lead-through openings 28 and are welded there to other feed lines instead of being bent over. These supply lines then lie next to the connecting lines 19 on the unimpeded lower surface 30, ie on ribs which form between the depressions 32. This ensures a certain electrical safety distance between the feed lines and the end plate 20.

Im vorliegenden Beispiel enden die Anschlußleitungen innerhalb des Kochplattenrandes. Das Durchführungsstück und das Verfahren zur Herstellung ist aber auch für längere Anschlußleitungen bestens geeignet, weil die Enden ohnehin von einem Greifer erfaßt und ausgerichtet werden und nach der Auffädelung und Öffnung und Zurückziehen des Greifers der Abschlußdeckel dann von selbst in die richtige Lage fällt. Dazu ist es jedoch erforderlich, daß das Durchführungsstück 22, wie beschrieben, fest und direkt an dem Abschlußdeckel angebracht ist. Es ist zu erkennen, daß das Abschlußstück im Vergleich zu denen nach dem Stand der Technik wesentlich geringere Abmessungen und vor allem eine geringere thermische Masse hat, so daß es leicht auf die benötigte Temperatur kommt, um Kondensatbildungen auszuschließen. Es ist auch vorteilhaft, daß der Raum zwischen dem Durchführungsstück und der Unterseite 40 des Kochplattenkörpers frei und groß genug ist, um die starren Anschlußleitungen unbehindert verlegen zu können. Sie müssen also nicht um Teile des Durchführungsstückes herum verlegt werden. Durch die Vertiefung 26 im Abschlußdeckel läßt sich das Durchführungsstück sogar noch in Richtung auf das den Kochplattenkörper hin versetzen, um außen eine nicht über die Randkante 27 nach unten ragende Anordnung zu schaffen. Das Durchführungsstück selbst, daß aus dem relativ teuren und schwer zu verarbeitenden Isoliermaterial Steatit hergestellt ist, ist in der Gestaltung einfach und materialsparend in einer nur einfach geteilten Form herzustellen. Die Dicke des Durchführungsstückes beträgt weniger als ein Drittel, vorzugsweise nur ein Fünftel der Gesamtlänge.In the present example, the connection lines end within the hotplate edge. The lead-through piece and the method for manufacturing is also ideally suited for longer connecting lines, because the ends are gripped and aligned anyway by a gripper and then after the threading and opening and pulling back of the gripper, the end cover is automatically in the correct position falls. For this purpose, however, it is necessary that the lead-through piece 22, as described, is firmly and directly attached to the end cover. It can be seen that the end piece has significantly smaller dimensions and, above all, a lower thermal mass compared to those according to the prior art, so that it is easy to get to the temperature required to rule out condensation. It is also advantageous that the space between the bushing and the underside 40 of the hotplate body is free and large enough to be able to lay the rigid connecting lines unhindered. So you do not have to lay around parts of the bushing. Through the recess 26 in the end cover, the feed-through piece can even be displaced in the direction of the hotplate body in order to create an arrangement which does not project downwards over the edge 27. The bushing itself, that steatite is made of the relatively expensive and difficult-to-process insulating material, is simple to design and saves material in a simply divided form. The thickness of the bushing is less than a third, preferably only a fifth of the total length.

Claims (9)

  1. Bushing for the passage of connecting leads (19) through a lower cover plate (20) of an electric hotplate (11), which has a hotplate body (12) and heating resistors (16) embedded on its underside, the bushing (22) being made from thermally stable insulating material, is inserted in an opening (25) of the cover plate (20), is supported on one side thereof and has several passage openings (28), which are open to both sides of the cover plate (20) and receive leads (19), characterized in that the bushing (22) is shaped like a flat plate located in the plane of the cover plate (20) and whose thickness is less than one third and preferably approximately one fifth of its length and that the bushing (22) is directly fixed to the cover plate (20) in the vicinity of the opening (25) by retaining means (33, 34) acting directly between the bushing (22) and the cover plate (20), without it being necessary for holding purposes to have indirect retaining means, such as a support on leads or the hotplate body.
  2. Bushing according to claim 1, characterized in that it is at a considerable distance, preferably of the order of magnitude of the thickness of the bushing (22), from the underside (40) of the hotplate body or heating means and preferably the distance is roughly half the height of the space (21) between the underside (40) of the hotplate body (12) and the cover plate (20) or more.
  3. Bushing according to any one of the preceding claims, characterized in that the hotplate body (12) is made from cast iron.
  4. Bushing according to any one of the preceding claims, characterized in that it has outwardly open retaining recesses (33), in which engage the retaining clips (34) of the cover plate, which are preferably arranged on both narrow sides (23) of the oval, elongated bushing (22).
  5. Bushing according to any one of the preceding claims, characterized in that it has a flange-like shoulder (24) on its side remote from the hotplate body (12) and which is preferably placed in a cover plate (20) depressed towards the hotplate body.
  6. Bushing according to any one of the preceding claims, characterized in that the passage openings (28) have funnel-shaped extensions (31) on the side thereof facing the hotplate body (12).
  7. Bushing according to any one of the preceding claims, characterized in that the passage openings (28) are arranged in a row and the bushing (22) has on its side (30) remote from the hotplate body (12) groove-like depressions (32), which are at right angles to the direction of the row and preferably run from one side of the bushing (22) to the other.
  8. Bushing according to any one of the preceding claims, characterized in that on the outer edges of the side of the bushing facing the hotplate body (12) it has insertion slopes (37).
  9. Method for fitting a cover plate (20) with bushing (22) and with leads (19) passed through passage openings (28) therein of an electric hotplate to the hotplate body (12) thereof, characterized in that firstly the bushing (22) is fixed in an opening of the cover plate (20) and is firmly fitted therein by retaining means (33, 34) and then the leads (19) are automatically gripped by means of a gripper and held in an orientation corresponding to the passage openings (28) and that then the cover plate with the bushing (22) fitted thereto is so guided over the free ends of the leads (19) that they are threaded into the passage openings (28) and subsequently the cover plate is fixed to the hotplate body (12).
EP87110250A 1986-08-30 1987-07-16 Feed-through piece for connecting cables of an electric cooking plate Expired - Lifetime EP0258590B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87110250T ATE76551T1 (en) 1986-08-30 1987-07-16 FEED-THROUGH FOR FEED-THROUGH CONNECTING CABLES FOR AN ELECTRIC HOT PLATE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3629549 1986-08-30
DE19863629549 DE3629549A1 (en) 1986-08-30 1986-08-30 PERFORMANCE PIECE FOR THROUGH CONNECTING CABLES FOR AN ELECTRIC COOKING PLATE

Publications (2)

Publication Number Publication Date
EP0258590A1 EP0258590A1 (en) 1988-03-09
EP0258590B1 true EP0258590B1 (en) 1992-05-20

Family

ID=6308552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110250A Expired - Lifetime EP0258590B1 (en) 1986-08-30 1987-07-16 Feed-through piece for connecting cables of an electric cooking plate

Country Status (8)

Country Link
US (1) US4808797A (en)
EP (1) EP0258590B1 (en)
JP (2) JPS6369190A (en)
AT (1) ATE76551T1 (en)
AU (1) AU605502B2 (en)
DE (2) DE3629549A1 (en)
ES (1) ES2032779T3 (en)
YU (1) YU47268B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4993553A (en) * 1988-02-09 1991-02-19 E.G.O. Elektro Gerate Blanc U. Fischer Electric hotplate stacking aid
DE3803806A1 (en) * 1988-02-09 1989-08-17 Ego Elektro Blanc & Fischer Electric hotplate
DE4004308A1 (en) * 1990-02-13 1991-08-14 Ego Elektro Blanc & Fischer Electric hotplate with feedthrough connector
EP1098498A1 (en) 1999-11-04 2001-05-09 Koninklijke Philips Electronics N.V. Device having a display for stereoscopic images
DE102017211100A1 (en) * 2017-06-29 2019-01-03 E.G.O. Elektro-Gerätebau GmbH hotplate

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE262004C (en) * 1913-03-06
US2101110A (en) * 1932-07-01 1937-12-07 Westinghouse Electric & Mfg Co Heating unit
FR994833A (en) * 1945-02-05 1951-11-22 Calor Sa Improvement in the assembly of hotplates on stoves and electric cookers
DE1021967B (en) * 1955-04-06 1958-01-02 Karl Fischer Electric mass cooking plate
DE1291032B (en) * 1962-09-20 1969-03-20 Ego Elektro Blanc & Fischer Electric mass cooking plate
US3300621A (en) * 1964-04-22 1967-01-24 Fischer Karl Electric hotplate and method of making same
DE1565049B2 (en) * 1965-02-25 1972-03-30 Siemens Electrogerate GmbH, 1000 Berlin u 8000 München CLOSED ELECTRIC COOKING PLATE
DE1690557C3 (en) * 1968-02-01 1974-06-27 Duras, Herbert, Dipl.-Ing., 7518 Bretten Electric mass cooking plate
JPS5111680U (en) * 1974-07-11 1976-01-28
DE2620004C3 (en) * 1976-05-06 1979-05-31 Fischer, Karl, 7519 Oberderdingen Electric hotplate with a temperature limiter
JPS5851606B2 (en) * 1978-04-20 1983-11-17 松下電器産業株式会社 Acoustic characteristics measurement method
JPS5924098U (en) * 1982-08-05 1984-02-15 株式会社小松製作所 Radio controlled parts to be operated. Manual operation switching device
DE3301219A1 (en) * 1983-01-15 1984-07-19 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen ELECTRIC COOKING PLATE
DE3425896A1 (en) * 1984-07-13 1986-01-23 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen ELECTRIC COOKING PLATE

Also Published As

Publication number Publication date
ES2032779T3 (en) 1993-03-01
EP0258590A1 (en) 1988-03-09
YU47268B (en) 1995-01-31
AU605502B2 (en) 1991-01-17
DE3629549A1 (en) 1988-03-03
AU7765687A (en) 1988-03-03
YU154987A (en) 1990-04-30
US4808797A (en) 1989-02-28
ATE76551T1 (en) 1992-06-15
DE3779223D1 (en) 1992-06-25
JPH0585323U (en) 1993-11-19
JPS6369190A (en) 1988-03-29

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