EP0026865B1 - Arrangement for the removal of a fire-alarm unit from a socket - Google Patents

Arrangement for the removal of a fire-alarm unit from a socket Download PDF

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Publication number
EP0026865B1
EP0026865B1 EP19800105626 EP80105626A EP0026865B1 EP 0026865 B1 EP0026865 B1 EP 0026865B1 EP 19800105626 EP19800105626 EP 19800105626 EP 80105626 A EP80105626 A EP 80105626A EP 0026865 B1 EP0026865 B1 EP 0026865B1
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EP
European Patent Office
Prior art keywords
fire detector
cylindrical component
fire
cylindrical
removal
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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
Application number
EP19800105626
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German (de)
French (fr)
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EP0026865A3 (en
EP0026865A2 (en
Inventor
Rudolf Fässler
Wolfgang Schubert
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Cerberus AG
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Cerberus AG
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Publication of EP0026865A2 publication Critical patent/EP0026865A2/en
Publication of EP0026865A3 publication Critical patent/EP0026865A3/en
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/12—Checking intermittently signalling or alarm systems
    • G08B29/14—Checking intermittently signalling or alarm systems checking the detection circuits
    • G08B29/145—Checking intermittently signalling or alarm systems checking the detection circuits of fire detection circuits

Definitions

  • the invention relates to a device for removing a fire detector with an essentially rotationally symmetrical shape from a bayonet base, which device has a cylindrical component which can be pushed over the fire detector and whose axis corresponds to the axis of rotation of the fire detector.
  • Such devices are known, for example, from Swiss Patents No. 508251 and No. 558 963. They serve a fire detector, the outer shape and housing of which are essentially, ie. H. apart from, for example, openings and retaining webs, rotationally symmetrical, i.e. e.g. is cylindrical or slightly conical, from a base. In most cases, this base is designed as a bayonet base. To insert the fire detector into the base and to remove the same from this base, the fire detector must therefore be rotated about its axis.
  • fire detectors and their bases are usually installed in places where they are not easily accessible by hand. Removing the fire alarm from a base, for example for inspection and cleaning purposes, is therefore very time-consuming without tools.
  • Devices have already been described in the preceding publications with which a fire alarm can be removed from a base quickly and easily, even in the case of an unfavorable placement.
  • the previously known fire detectors described contain locking elements which make it impossible to release the bayonet lock without aids.
  • this locking takes place by means of a movable element which slips into a recess in the fire alarm.
  • the removal device suitable for releasing the closure consists of a cylindrical component which presses the locking element mentioned back into its starting position as soon as the cylindrical component is pushed over the fire detector.
  • a rubber insert in the cylindrical component clamps the fire detector so that it can be rotated around its axis so that the bayonet catch is released.
  • a disadvantage of this known device is that it can only be used if the dimensions of the fire detectors can be kept within very narrow tolerances. Even if these tolerances are slightly exceeded, the fire detector cannot be securely clamped and the locking mechanism can no longer be safely released.
  • the known removal devices were not usable for different types of fire detectors, which may also be used mixed in the same system, so that a special removal device was required for each detector type.
  • the object of the invention is to eliminate the above-mentioned disadvantages of previously known devices and, in particular, to provide a device for removing a fire detector from a base, which can be used for fire detectors with greater tolerances of the external dimensions than before, and at the same time can be used for fire detectors of different types and dimensions is.
  • this object is achieved in that a clamping device is provided which has at least one element which, when an axially directed pressure is exerted, can be pushed inwards in the radial direction until it is seated on the outer surface of the fire detector.
  • a bushing 9 is inserted into the upper opening of a long holding rod 10, which is designed as a tube and carries a plate 11 on its upper edge.
  • a sliding tube 12 is fitted so as to be movable in the axial direction.
  • this sliding tube In the lower part of this sliding tube there is an end plate 18, while a stamp 13 is inserted in the upper part thereof, the position of the stamp being fixed by a pin 14 inserted into one of the bores 15.
  • a stop plate 5 is attached to the upper end of the stamp 13, the upper side of which bears a rubber or plastic pad 6.
  • the sliding tube 12 with the plunger 13 and the stop plate 5 is pressed upwards by a spiral spring 19 arranged between the bushing 9 and the end plate 18.
  • this sleeve 8 On the stop plate 5 is by means of one or more, for. B. three, bracket 7 attached at a suitable distance above the stop plate 5, a sleeve 8.
  • the upper end of this sleeve 8 is shaped as a cylindrical component 3.
  • the opening of this cylindrical component 3 is provided in such a way that it is a little bit larger than the outside diameter of the fire detector 20 to be removed from a base.
  • a clamping device is attached to the sleeve 8, which comprises a movable element 1, the free end of which rests on an oblique piece of the strip 4.
  • a fire detector 20 shown schematically in the figure with a rotationally symmetrical e.g.
  • the device shown is placed over the fire detector from below, so that the cylindrical component 3 is guided over the outer wall 21 of the fire detector 20.
  • the device is pushed over the fire detector until its underside 22 touches the stop plate 5. If a further pressure is now exerted in the axial direction, the spring 19 is compressed, the plate 11 moves upward, as do the strips 4 attached to this plate 11.
  • the free ends of the movable elements 1 of the clamping device are pressed radially inwards until their jaws 2 are firmly seated on the outside 21 of the fire detector housing and thus clamp the fire detector.
  • the device can then be rotated with the fire detector clamped in place and the bayonet base released. After the connection has been released, the spring 19 relaxes again, so that the movable elements 1 spring back and the jaws 2 release the fire detector and the latter can be removed from the device.
  • the device can be adjusted by changing the position of the plunger 13 relative to the sliding tube 12. This is done by inserting the pin 14 into one of the other bores 15 of the stamp. A suitable stepless height adjustment can of course also be provided.
  • the cylindrical component 13 can be completely slipped over the fire detector 20, namely into the groove between the fire detector and base bead.
  • This is particularly expedient in the case of fire detectors which are protected in a base by a locking bolt against unauthorized removal, as described, for example, in Swiss Patent No. 558,963.
  • the locking bolt is pressed back into this gap by completely pressing the cylindrical component 3, and the fire detector can be detached from the base.
  • Fig. 2 shows such a device, in which the parts identical to the previous figure have the same designations.
  • the device according to FIG. 2 differs only in the design of the sleeve.
  • this consists of an outer sleeve part 28 and the cylindrical component 23 movable in this part.
  • a plurality of springs 24 are provided which press the part 23 upwards in comparison to the part 28.
  • three slots 25 are provided in the inner part 23, through which the clamping jaws 2 protrude from the outer part 28 through the inner cylinder part 23 and can clamp the fire detector 20.
  • the inner cylindrical part 23 When this device is pushed onto a fire detector 20, the inner cylindrical part 23 first slides into the slot between the fire detector and base and presses the locking bolt back. If a further pressure is now exerted, the spring 24 is tensioned and the rest of the device is also pushed over the fire detector until the jaws of the fire detector clamps and the bayonet catch can be unlocked.
  • the mobility of the two sleeve parts 23 and 28 relative to one another means that the device can in any case be pushed far enough over the fire detector to ensure secure clamping and at the same time the locking is released. In order to obtain a larger margin, it can be expedient to make the stop adjustable for the mobility of the two sleeve parts 23 and 28 against each other, e.g.
  • a device designed in this way for removing a fire detector from a base thus shows a largely universal usability in fire detectors with a rotationally symmetrical shape of different structural heights without the need to maintain close tolerances.
  • stop plate 5 and the cylindrical component 3 or 23 may be expedient to design the stop plate 5 and the cylindrical component 3 or 23 to be movable relative to one another.
  • This embodiment differs from the devices according to FIGS. 1 and 2 that the holding tube 10 carries a closure plate 32, in the center of which a ball joint 30 is arranged.
  • a rod 31 which is displaceably guided by the end plate 18 of the sliding tube 12 against the force of the spring 19, can be rotated with respect to the mounting tube 10 to a certain angle.
  • the sliding tube 12 is displaceable in the sleeve 29, which is connected to the rod 31.
  • the funnel 33 attached to the end plate 32 limits the possible angular deflection.

Description

Die Erfindung betrifft eine Vorrichtung zur Entnahme eines Brandmelders mit im wesentlichen rotationssymmetrischer Form aus einem Bayonettsockel, welche Vorrichtung ein über den Brandmelder schiebbares zylindrisches Bauteil aufweist, dessen Achse der Rotationsachse des Brandmelders entspricht.The invention relates to a device for removing a fire detector with an essentially rotationally symmetrical shape from a bayonet base, which device has a cylindrical component which can be pushed over the fire detector and whose axis corresponds to the axis of rotation of the fire detector.

Solche Vorrichtungen sind beispielsweise aus den Schweizer Patenten Nr. 508251 und Nr. 558 963 bekannt. Sie dienen dazu einen Brandmelder, dessen äussere Form und Gehäuse im wesentlichen, d. h. abgesehen beispielsweise von Öffnungen und Haltestegen, rotationssymmetrisch, d.h. z.B. zylindrisch oder leicht konisch ausgebildet ist, aus einem Sockel zu entnehmen. Dieser Sockel ist in den meisten Fällen als Bayonettsockel ausgebildet. Zum Einsetzen des Brandmelders in den Sockel und zum Entnehmen desselben aus diesem Sockel ist daher eine Verdrehung des Brandmelders um seine Achse erforderlich.Such devices are known, for example, from Swiss Patents No. 508251 and No. 558 963. They serve a fire detector, the outer shape and housing of which are essentially, ie. H. apart from, for example, openings and retaining webs, rotationally symmetrical, i.e. e.g. is cylindrical or slightly conical, from a base. In most cases, this base is designed as a bayonet base. To insert the fire detector into the base and to remove the same from this base, the fire detector must therefore be rotated about its axis.

Brandmelder und deren Sockel sind jedoch meist an Stellen angebracht, wo sie von Hand nicht ohne weiteres zugänglich sind. Eine Entnahme des Brandmelders aus einem Sockel, beispielsweise zu Überprüfungs- und Reinigungszwecken, ist daher ohne Hilfsmittel sehr zeitraubend. In den angeführten Vorpublikationen sind bereits Vorrichtungen beschrieben worden, mit welchen eine Entnahme eines Brandmelders aus einem Sockel auch bei ungünstiger Plazierung schnell und leicht möglich ist.However, fire detectors and their bases are usually installed in places where they are not easily accessible by hand. Removing the fire alarm from a base, for example for inspection and cleaning purposes, is therefore very time-consuming without tools. Devices have already been described in the preceding publications with which a fire alarm can be removed from a base quickly and easily, even in the case of an unfavorable placement.

Dabei wird gleichzeitig dem Umstand Rechnung getragen, dass eine Entnahme eines Brandmelders durch jedermann, insbesondere durch unbefugte Personen, ohnehin unerwünscht ist. Die beschriebenen vorbekannten Brandmelder enthalten zu diesem Zweck Arretierelemente, welche eine Lösung des Bayonettverschlusses ohne Hilfsmittel verunmöglichen. Bei Ausführungsbeispielen, die im Schweizer Patent Nr. 558 963 beschrieben sind, erfolgt diese Arretierung durch ein bewegliches Element, das in einer Aussparung des Brandmelders hineinrutscht. Die zur Lösung des Verschlusses geeignete Entnahmevorrichtung besteht dabei aus einem zylindrischen Bauteil, welches das genannte Arretierelement in seine Ausgangslage zurückdrückt, sobald das zylindrische Bauteil über den Brandmelder geschoben wird. Dabei wird gleichzeitig durch eine Gummieinlage im zylindrischen Bauteil der Brandmelder festgeklemmt, sodass dieser um seine Achse verdreht werden kann, sodass der Bayonettverschluss sich löst.At the same time, the fact is taken into account that removal of a fire alarm by anyone, especially by unauthorized persons, is undesirable anyway. For this purpose, the previously known fire detectors described contain locking elements which make it impossible to release the bayonet lock without aids. In the case of exemplary embodiments which are described in Swiss Patent No. 558,963, this locking takes place by means of a movable element which slips into a recess in the fire alarm. The removal device suitable for releasing the closure consists of a cylindrical component which presses the locking element mentioned back into its starting position as soon as the cylindrical component is pushed over the fire detector. At the same time, a rubber insert in the cylindrical component clamps the fire detector so that it can be rotated around its axis so that the bayonet catch is released.

Nachteilig bei dieser vorbekannten Vorrichtung ist jedoch, dass sie nur brauchbar ist, wenn die Abmessungen der Brandmelder in sehr engen Toleranzen gehalten werden können. Schon bei geringfügigen Überschreitungen dieser Toleranzen ist kein sicheres Festklemmen des Brandmelders und keine sichere Lösung der Arretierung mehr gewährleistet. Für verschiedene Typen von Brandmeldern, welche gegebenenfalls auch untermischt in der gleichen Anlage verwendet werden, waren die vorbekannten Entnahmevorrichtungen ohnehin nicht brauchbar, sodass für jeden Meldertyp eine besondere Entnahmevorrichtung erforderlich war.A disadvantage of this known device, however, is that it can only be used if the dimensions of the fire detectors can be kept within very narrow tolerances. Even if these tolerances are slightly exceeded, the fire detector cannot be securely clamped and the locking mechanism can no longer be safely released. In any case, the known removal devices were not usable for different types of fire detectors, which may also be used mixed in the same system, so that a special removal device was required for each detector type.

Aufgabe der Erfindung ist die Beseitigung der vorstehend erwähnten Nachteile vorbekannter Vorrichtungen und insbesondere die Schaffung einer Vorrichtung zur Entnahme eines Brandmelders aus einem Sockel, welche für Brandmelder mit grösseren Toleranzen der äusseren Abmessungen als bisher betriebssicher brauchbar ist, sowie gleichzeitig für Brandmelder verschiedener Typen und Abmessungen verwendbar ist.The object of the invention is to eliminate the above-mentioned disadvantages of previously known devices and, in particular, to provide a device for removing a fire detector from a base, which can be used for fire detectors with greater tolerances of the external dimensions than before, and at the same time can be used for fire detectors of different types and dimensions is.

Erfindungsgemäss wird diese Aufgabe dadurch gelöst, dass eine Klemmeinrichtung vorgesehen ist, die wenigstens ein Element aufweist, das bei Ausübung eines axialgerichteten Andruckes sich in radialer Richtung nach innen bis zum Aufsitzen auf die Aussenfläche des Brandmelders schieben lässt.According to the invention, this object is achieved in that a clamping device is provided which has at least one element which, when an axially directed pressure is exerted, can be pushed inwards in the radial direction until it is seated on the outer surface of the fire detector.

Eine zweckmässige Weiterbildung ergibt sich, wenn mehrere, z.B. wenigstens drei, bewegliche Elemente auf einem Kreisumfang angeordnet sind.Appropriate further training results if several, e.g. at least three, movable elements are arranged on a circumference.

Die Erfingung wird anhand der in den Figuren im Schnitt dargestellten Ausführungsbeispiele beschrieben.

  • Fig. 1 zeigt eine erste Vorrichtung mit starrem zylindrischem Bauteil.
  • Fig. 2 zeigt eine weitere Vorrichtung mit beweglichem zylindrischem Bauteil.
  • Fig. 3 zeigt eine dritte Vorrichtung mit Kugelkopfgelenk.
The invention is described using the exemplary embodiments shown in section in the figures.
  • Fig. 1 shows a first device with a rigid cylindrical component.
  • Fig. 2 shows another device with a movable cylindrical member.
  • Fig. 3 shows a third device with ball joint.

Bei dem in Fig. 1 dargestellten Ausführungsbeispiel ist in die obere Öffnung einer langen, als Rohr ausgebildeten Haltestange 10 eine Buchse 9 eingesetzt, die an ihrem oberen Rand einen Teller 11 trägt. In der Buchse 9 ist ein Gleitrohr 12 in axialer Richtung beweglich eingepasst.In the exemplary embodiment shown in FIG. 1, a bushing 9 is inserted into the upper opening of a long holding rod 10, which is designed as a tube and carries a plate 11 on its upper edge. In the bushing 9, a sliding tube 12 is fitted so as to be movable in the axial direction.

Im unteren Teil dieses Gleitrohres befindet sich eine Abschlussplatte 18, während in dessen oberen Teil ein Stempel 13 eingesetzt ist, wobei die Position des Stempels durch einen in eine der Bohrungen 15 gesteckten Stift 14 festgelegt ist. Auf das obere Ende des Stempels 13 ist ein Anschlagteller 5 angesetzt, dessen Oberseite eine Gummi-oder Kunststoffauflage 6 trägt. Das Gleitrohr 12 mit dem Stempel 13 und dem Anschlagteller 5 wird durch eine zwischen der Buchse 9 und der Abschlussplatte 18 angeordnete Spiralfeder 19 nach oben gedrückt.In the lower part of this sliding tube there is an end plate 18, while a stamp 13 is inserted in the upper part thereof, the position of the stamp being fixed by a pin 14 inserted into one of the bores 15. A stop plate 5 is attached to the upper end of the stamp 13, the upper side of which bears a rubber or plastic pad 6. The sliding tube 12 with the plunger 13 and the stop plate 5 is pressed upwards by a spiral spring 19 arranged between the bushing 9 and the end plate 18.

Am Anschlagteller 5 ist mittels eines oder mehrerer, z. B. drei, Haltebügel 7 in geeignetem Abstand oberhalb des Anschlagtellers 5 eine Hülse 8 angebracht. Das obere Ende dieser Hülse 8 ist als zylindrisches Bauteil 3 ausgeformt. Dabei ist die Öffnung dieses zylindrischen Bauteiles 3 so gewährt, dass diese ein klein wenig grösser ist als der Aussendurchmesser des aus einem Sockel zu entnehmenden Brandmelders 20.On the stop plate 5 is by means of one or more, for. B. three, bracket 7 attached at a suitable distance above the stop plate 5, a sleeve 8. The upper end of this sleeve 8 is shaped as a cylindrical component 3. The opening of this cylindrical component 3 is provided in such a way that it is a little bit larger than the outside diameter of the fire detector 20 to be removed from a base.

Am unteren Teller 11 sind ein oder mehrere, z. B. ebenfalls drei, Streifen 4 befestigt, deren oberes Ende an der Innenwand der Hülse 8 anliegt und an dieser Innenwand nach oben zu gleiten vermag. Weiterhin ist an der Hülse 8 eine Klemmeinrichtung befestigt, welche ein bewegliches Element 1 umfasst, dessen freies Ende auf einem schrägen Stück des Streifens 4 aufliegt.On the lower plate 11, one or more, for. B. also three, strips 4 attached, the upper end of which rests against the inner wall of the sleeve 8 and slide upwards on this inner wall can Furthermore, a clamping device is attached to the sleeve 8, which comprises a movable element 1, the free end of which rests on an oblique piece of the strip 4.

Gebrauch und Wirkungsweise der vorstehend beschriebenen Vorrichtung sind wie folgt:Use and operation of the device described above are as follows:

Um einen in der Figur schematisch dargestellten Brandmelder 20 mit rotationssymmetrischer, z.B. zylindrischer oder leicht konischer Gehäuseform aus einem Sockel zu entnehmen, wird die dargestellte Vorrichtung von unten über den Brandmelder gestülpt, sodass das zylindrische Bauteil 3 über die Aussenwand 21 des Brandmelders 20 hinweggeleitet wird. Die Vorrichtung wird soweit über den Brandmelder geschoben, bis dessen Unterseite 22 den Anschlagteller 5 berührt. Wird nun ein weiterer Andruck in axialer Richtung ausgeübt, so wird die Feder 19 zusammengedrückt, der Teller 11 bewegt sich nach oben, ebenso die an diesen Teller 11 angesetzten Streifen 4. Dadurch werden die freien Enden der beweglichen Elemente 1 der Klemmvorrichtung radial nach innen gedrückt bis deren Klemmbacken 2 fest auf der Aussenseite 21 des Brandmeldergehäuses aufsitzen und somit den Brandmelder festklemmen. Daraufhin kann die Vorrichtung mit dem festgeklemmten Brandmelder verdreht werden und der Bayonettsockel gelöst werden. Nach Lösung der Verbindung entspannt sich die Feder 19 wieder, sodass die beweglichen Elemente 1 zurückfedern und die Klemmbacken 2 den Brandmelder freigeben und dieser aus der Vorrichtung entnommen werden kann.Around a fire detector 20 shown schematically in the figure with a rotationally symmetrical, e.g. To remove a cylindrical or slightly conical housing shape from a base, the device shown is placed over the fire detector from below, so that the cylindrical component 3 is guided over the outer wall 21 of the fire detector 20. The device is pushed over the fire detector until its underside 22 touches the stop plate 5. If a further pressure is now exerted in the axial direction, the spring 19 is compressed, the plate 11 moves upward, as do the strips 4 attached to this plate 11. As a result, the free ends of the movable elements 1 of the clamping device are pressed radially inwards until their jaws 2 are firmly seated on the outside 21 of the fire detector housing and thus clamp the fire detector. The device can then be rotated with the fire detector clamped in place and the bayonet base released. After the connection has been released, the spring 19 relaxes again, so that the movable elements 1 spring back and the jaws 2 release the fire detector and the latter can be removed from the device.

Auf diese Weise wird also automatisch sichergestellt, dass ein Brandmelder in dem Augenblick festgeklemmt wird, in dem die Vorrichtung vollständig über den Brandmelder gestülpt ist. Der genaue Durchmesser des Brandmelders oder die Einhaltung von engen Toleranzen ist dabei überflüssig, da die Klemmbacken sich in jedem Fall nach Berührung des Anschlagtellers radial nach innen bewegen, solange bis der Brandmelder in hinreichendem Masse festgeklemmt ist. Abweichungen der Abmessungen des Brandmelders werden auf diese Weise automatisch ausgeglichen. Zur Anpassung an grössere Abweichungen der Abmessungen oder an andere Meldertypen mit abweichender Höhe lässt sich die Vorrichtung verstellen, indem die Position des Stempels 13 zum Gleitrohr 12 verändert werden kann. Dies erfolgt dadurch, dass der Stift 14 in eine der anderen Bohrungen 15 des Stempels eingesetzt wird. Natürlich kann auch eine geeignete stufenlose Höhenverstellung vorgesehen sein.In this way it is automatically ensured that a fire detector is clamped at the moment when the device is completely slipped over the fire detector. The exact diameter of the fire detector or compliance with narrow tolerances is superfluous, since the clamping jaws always move radially inwards after touching the stop plate until the fire detector has been sufficiently clamped. Deviations in the dimensions of the fire detector are automatically compensated in this way. In order to adapt to larger deviations in dimensions or to other types of detectors with different heights, the device can be adjusted by changing the position of the plunger 13 relative to the sliding tube 12. This is done by inserting the pin 14 into one of the other bores 15 of the stamp. A suitable stepless height adjustment can of course also be provided.

Weiterhin kann es von Vorteil sein, wenn das zylinderförmige Bauteil 13 vollständig über den Brandmelder 20 gestülpt werden kann, und zwar bis in die Rille zwischen Brandmelder und Sockelwulst. Dies ist besonders zweckmässig bei solchen Brandmeldern, welche in einem Sockel durch einen Arretierbolzen gegen unbefugte Entnahme geschützt sind, wie beispeilsweise im Schweizer Patent Nr. 558 963 beschrieben. In diesem Fall wird durch das vollständige Hineindrükken des zylindrischen Bauteiles 3 in diesen Spalt der Arretierbolzen zurückgedrückt, und der Brandmelder lässt sich aus dem Sockel lösen.Furthermore, it can be advantageous if the cylindrical component 13 can be completely slipped over the fire detector 20, namely into the groove between the fire detector and base bead. This is particularly expedient in the case of fire detectors which are protected in a base by a locking bolt against unauthorized removal, as described, for example, in Swiss Patent No. 558,963. In this case, the locking bolt is pressed back into this gap by completely pressing the cylindrical component 3, and the fire detector can be detached from the base.

In diesem Fall ist es zweckmässig, die Vorrichtung so auszuführen, dass das zylindrische Bauteil 3 gegenüber der Hülse beweglich ist. Fig. 2 zeigt eine solche Vorrichtung, bei welcher die mit der vorhergehenden Figur identischen Teile die gleichen Bezeichnungen tragen.In this case, it is expedient to design the device in such a way that the cylindrical component 3 is movable relative to the sleeve. Fig. 2 shows such a device, in which the parts identical to the previous figure have the same designations.

Die Vorrichtung nach Fig. 2 unterscheidet sich lediglich durch die Ausbildung der Hülse. Diese besteht bei diesem Beispiel aus einem äusseren Hülsenteil 28 und dem in diesem Teil beweglichen zylindrischen Bauteil 23. Zwischen den unteren Rändern der Teile 23 und 28 sind mehrere Federn 24 vorgesehen, die das Teil 23 im Vergleich zum Teil 28 nach oben drücken. Dabei sind, um die Beweglichkeit der Klemmbacken 2 zu gewährleisten, im inneren Teil 23 drei Schlitze 25 vorgesehen, durch welche die Klemmbacken 2 vom äusseren Teil 28 durch den inneren Zylinderteil 23 hindurchragen und den Brandmelder 20 festklemmen können.The device according to FIG. 2 differs only in the design of the sleeve. In this example, this consists of an outer sleeve part 28 and the cylindrical component 23 movable in this part. Between the lower edges of the parts 23 and 28, a plurality of springs 24 are provided which press the part 23 upwards in comparison to the part 28. In order to ensure the mobility of the clamping jaws 2, three slots 25 are provided in the inner part 23, through which the clamping jaws 2 protrude from the outer part 28 through the inner cylinder part 23 and can clamp the fire detector 20.

Beim Aufschieben dieser Vorrichtung auf einen Brandmelder 20 gleitet zunächst der innere zylindrische Teil 23 in den Schlitz zwischen Brandmelder und Sockel hinein und drückt den Arretierungsbolzen zurück. Wird nun ein weiterer Andruck ausgeübt, so wird die Feder 24 gespannt, und der Rest der Vorrichtung schiebt sich ebenfalls über den Brandmelder, so lange bis die Klemmbacken den Brandmelderfestklemmen und der Bayonettverschluss entriegelt werden kann. Durch die Beweglichkeit der beiden Hülsenteile 23 und 28 gegeneinander wird also erreicht, dass die Vorrichtung in jedem Fall weit genug über den Brandmelder geschoben werden kann, um ein sicheres Festklemmen zu gewährleisten und gleichzeitig die Arretierung aufgehoben wird. Um einen grösseren Spielraum zu bekommen, kann es dabei zweckmässig sein, den Anschlag für die Beweglichkeit der beiden Hülsenteile 23 und 28 gegeneinander einstellbar zu machen, z.B. mittels eines versetzbaren oder entfernbaren Anschlagstiftes 26. In diesem Fall kann entweder dieser Anschlagstift 26 oder die umgebogene Kante 27 des äusseren Hülsenteiles 28 die Bewegung der beiden Hülsenteile gegeneinander begrenzen. Eine auf diese Weise ausgebildete Vorrichtung zur Entnahme eines Brandmelders aus einem Sockel zeigt damit eine weitgehend universelle Verwendbarkeit bei Brandmeldern mit rotationssymmetrischer Form verschiedener Bauhöhe ohne die Notwendigkeit der Einhaltung enger Toleranzen.When this device is pushed onto a fire detector 20, the inner cylindrical part 23 first slides into the slot between the fire detector and base and presses the locking bolt back. If a further pressure is now exerted, the spring 24 is tensioned and the rest of the device is also pushed over the fire detector until the jaws of the fire detector clamps and the bayonet catch can be unlocked. The mobility of the two sleeve parts 23 and 28 relative to one another means that the device can in any case be pushed far enough over the fire detector to ensure secure clamping and at the same time the locking is released. In order to obtain a larger margin, it can be expedient to make the stop adjustable for the mobility of the two sleeve parts 23 and 28 against each other, e.g. by means of a displaceable or removable stop pin 26. In this case, either this stop pin 26 or the bent edge 27 of the outer sleeve part 28 can limit the movement of the two sleeve parts against one another. A device designed in this way for removing a fire detector from a base thus shows a largely universal usability in fire detectors with a rotationally symmetrical shape of different structural heights without the need to maintain close tolerances.

Zur Aufnahme von Positionsungenauigkeiten bei der Handhabung der Vorrichtung und zur Gewährleistung einer seitlichen Auskränkung kann es zweckmässig sein, den Anschlagteller 5 und das zylindrische Bauteil 3 oder 23 gegeneinander beweglich auszubilden.To accommodate position inaccuracies when handling the device and to ensure a lateral limitation, it may be expedient to design the stop plate 5 and the cylindrical component 3 or 23 to be movable relative to one another.

Fig. 3 zeigt eine derartige zweckmässige Weiterbildung der Erfindung, wobei identische Bauteile wiederum die gleichen Bezeichnungen tragen.3 shows such an expedient development of the invention, identical components in turn having the same designations.

Von den Vorrichtungen nach Fig. 1 und 2 unterscheidet sich dieses Ausführungsbeispiel dadurch, dass das Halterohr 10 einen Abschlussteller 32 trägt, in dessen Zentrum ein Kugelkopfgelenk 30 angeordnet ist.This embodiment differs from the devices according to FIGS. 1 and 2 that the holding tube 10 carries a closure plate 32, in the center of which a ball joint 30 is arranged.

Durch dieses ist eine durch die Abschlussplatte 18 des Gleitrohres 12 gegen die Kraft der Feder 19 verschiebbar geführte Stange 31 in einem gewissen Auskränkungswinkel gegenüber dem Halterungsrohr 10 verdrehbar. Das Gleitrohr 12 ist in der Hülse 29, die mit der Stange 31 verbunden ist, verschiebbar. Der am Abschlussteller 32 angesetzte Trichter 33 begrenzt die mögliche Winkelauslenkung.Through this, a rod 31, which is displaceably guided by the end plate 18 of the sliding tube 12 against the force of the spring 19, can be rotated with respect to the mounting tube 10 to a certain angle. The sliding tube 12 is displaceable in the sleeve 29, which is connected to the rod 31. The funnel 33 attached to the end plate 32 limits the possible angular deflection.

Durch diese Ausgestaltung wird ohne komplizierte, empfindliche und nur mit grossem Aufwand genau einzustellende Bauteile, wie z.B. bereits vorgeschlagene Cardan-Aufhängungen, erreicht, dass bei der Handhabung der Vorrichtung auftretende Positionsungenauigkeiten, z. B. ein nichtgenau vertikales Halten der Vorrichtung, automatisch ausgeglichen werden. Eine soche Vorrichtung besitzt also noch zusätzlich den Vorteil der leichteren Handhabbarkeit.With this configuration, components that are complicated, sensitive and can only be set with great effort, such as e.g. Cardan suspensions already proposed, achieved that position inaccuracies occurring when handling the device, for. B. a not exactly vertical holding of the device can be automatically compensated. Such a device also has the additional advantage of easier handling.

Claims (9)

1. Device for the removal of a fire detector (20) having a substantially rotational symmetrical form of a bayonet socket which device comprises a cylindrical component (3, 23) sliding over said fire detector, and the axis of said component corresponding to the rotational axis of said fire detector, characterized by a gripping device having at least one element (1) which on application of an axial pressure to said device is sliding over the outer surface (21) of said fire detector (20) in radial direction inward until it contacts said outer surface (21) of said fire detector (20).
2. Device according to Patent Claim 1, characterized in that the sliding element (1) comprises at its inner surface a material (2) having a great value of friction which material locks the outer surface (21) of said fire detector (20) if the device is distorted about its axis in order to unlock the bayonet fitting.
3. Device according to Patent Claim 2, characterized in that the gripping device as sliding element (1) comprises at least three clamps (1) being arranged on a circumference having approximately the radius of the cylindrical components (3, 23), which clamps (1) are pressed inward on application of an axial pressure to a mechanical gear (4).
4. Device according to one of the Patent Claims 1 to 3, characterized in that the cylindrical component (3, 23) is sliding in axial direction.
5. Device according to Patent Claim 4, characterized in that a lower stop of the cylindrical component (3, 23) is adjustable.
6. Device according to one of the Patent Claims 1 to 3, characterized in that the device comprises a stop disk (5) for the upper of the fire detector.
7. Device according to Patent Claim 6, characterized in that the stop disk (5) and the cylindrical component (3, 23) are reselient movable against each other.
8. Device according to Patent Claim 6, characterized in that the stop disk (5) is adjustable in axial direction.
9. Device according to any of Patent Claims 1 to 3, characterized in that the cylindrical component (3, 23) is connected by a swivel joint with a standard hand rod (30).
EP19800105626 1979-10-05 1980-09-19 Arrangement for the removal of a fire-alarm unit from a socket Expired EP0026865B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH8986/79 1979-10-05
CH898679A CH639859A5 (en) 1979-10-05 1979-10-05 DEVICE FOR REMOVING A FIRE DETECTOR FROM A BASE.

Publications (3)

Publication Number Publication Date
EP0026865A2 EP0026865A2 (en) 1981-04-15
EP0026865A3 EP0026865A3 (en) 1982-02-03
EP0026865B1 true EP0026865B1 (en) 1985-04-10

Family

ID=4347074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800105626 Expired EP0026865B1 (en) 1979-10-05 1980-09-19 Arrangement for the removal of a fire-alarm unit from a socket

Country Status (4)

Country Link
EP (1) EP0026865B1 (en)
JP (1) JPS6240609Y2 (en)
CH (1) CH639859A5 (en)
DE (1) DE3070454D1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2198383A (en) * 1986-11-22 1988-06-15 Anthony Francis Flanagan Gripping device
JP2574674Y2 (en) * 1991-05-01 1998-06-18 能美防災株式会社 Fire detector attachment / detachment
JP2584866Y2 (en) * 1991-05-01 1998-11-11 能美防災株式会社 Fire detector attachment / detachment
WO2003088167A2 (en) * 2002-04-11 2003-10-23 Mcgreal Timothy R Smoke alarm and mounting kit
DE10353837B4 (en) * 2003-11-18 2017-05-24 Robert Bosch Gmbh Testing device for fire detectors
AU2014214554B2 (en) * 2013-08-27 2019-10-31 Holy Smoke Alarms Pty Ltd Smoke alarm mounting and dismounting system and method
DE102018113461A1 (en) 2018-06-06 2019-12-12 Clemens Willy Manually manageable implement for erecting and maintaining detectors
CN111958524A (en) * 2020-09-23 2020-11-20 东风汽车集团有限公司 Cylinder quick centering mechanism

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH508251A (en) * 1970-07-23 1971-05-31 Cerberus Ag Ionization fire alarms
US3900795A (en) * 1973-08-15 1975-08-19 Honeywell Inc Installation and test tool for ionization smoke detector
CH558963A (en) * 1973-12-07 1975-02-14 Cerberus Ag FIRE ALARM.
JPS5617061Y2 (en) * 1977-08-30 1981-04-21

Also Published As

Publication number Publication date
DE3070454D1 (en) 1985-05-15
JPS6240609Y2 (en) 1987-10-17
JPS5656356U (en) 1981-05-15
EP0026865A3 (en) 1982-02-03
EP0026865A2 (en) 1981-04-15
CH639859A5 (en) 1983-12-15

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