EP2633954B1 - Electronically insulated fixing screw driver - Google Patents

Electronically insulated fixing screw driver Download PDF

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Publication number
EP2633954B1
EP2633954B1 EP13001021.8A EP13001021A EP2633954B1 EP 2633954 B1 EP2633954 B1 EP 2633954B1 EP 13001021 A EP13001021 A EP 13001021A EP 2633954 B1 EP2633954 B1 EP 2633954B1
Authority
EP
European Patent Office
Prior art keywords
head
shaft
insulating
screwdriver
insulating sheath
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.)
Active
Application number
EP13001021.8A
Other languages
German (de)
French (fr)
Other versions
EP2633954A2 (en
EP2633954A3 (en
Inventor
Jaroslav Fojtik
Frank Züker
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.)
Schuermann Sro
Original Assignee
Schuermann SRO
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 Schuermann SRO filed Critical Schuermann SRO
Publication of EP2633954A2 publication Critical patent/EP2633954A2/en
Publication of EP2633954A3 publication Critical patent/EP2633954A3/en
Application granted granted Critical
Publication of EP2633954B1 publication Critical patent/EP2633954B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B15/00—Screwdrivers
    • B25B15/02—Screwdrivers operated by rotating the handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/02—Arrangements for handling screws or nuts
    • B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
    • B25B23/10—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means
    • B25B23/101—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means for hand-driven screw-drivers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/10—Handle constructions characterised by material or shape
    • B25G1/12—Handle constructions characterised by material or shape electrically insulating material
    • B25G1/125—Handle constructions characterised by material or shape electrically insulating material for screwdrivers, wrenches or spanners

Definitions

  • the invention relates to an electrically insulated screwdriver, namely a retaining screwdriver, which can be safely worked on under voltage electrical equipment.
  • the object of the invention is to provide an electrically isolated retaining screwdriver according to the above criteria.
  • the screwdriver has in the usual way a handle 1 made of electrically insulating plastic and a blade 2, which has a long, with its rear end rotatably anchored in the handle 1 shank 21 made of metal, namely a suitable tool steel, and a front profile head 22.
  • the blade may be a cross-slotted blade, as shown, or any other conventional blade shape, including, for example, a hex for engagement in Allen screws to understand.
  • the shaft 21 is electrically insulated over its entire length to directly to the blade tip by an insulating jacket (parts 3 to 6).
  • the insulating jacket consists of several parts, namely a socket part 3 adjoining the handle 1 and immersed in the handle around the blade 2, a sleeve part connected thereto in an axial direction, a part 4 which is again connected thereto, and an insulating sleeve part 6, which adjoins this front, extending over the remaining length of the blade shaft 21.
  • axially elastic part 4 is only an example.
  • the training can also be modified. It is only important that the insulating jacket in the course of its axial length has an axially elastic intermediate piece, which allows a compression and in particular an expansion of the insulating jacket in the axial direction.
  • the formation of the insulating jacket of several parts is only an example.
  • the insulating jacket may also be integrally formed or consist of two interconnected parts.
  • a one-piece design may be advantageous in terms of strength considerations, since the insulating jacket must be sufficient to train sufficient load. It must be axially expandable to the necessary extent, and the front area of the insulating jacket serving to hold the screw must be sufficiently rigid to reliably perform the holding function.
  • a one-piece insulating jacket even with a relatively high rigidity of the material, a large axial length is available over which the required expansion path can be distributed.
  • the front Isolierhülsenteil 6 is in FIG. 2 shown separately, in a perspective view, so that in particular the formation of the head part 61 is clearly visible.
  • This head part 61 is formed like a hollow box, wherein the chamber 62 formed therein is closed by a front end wall and has a side opening out opening.
  • the front end wall has a central, also sideways slot-like opening through which, as in FIG. 1 is visible, the front profile head 22 of the screwdriver blade 2 can protrude.
  • the head part 61 has a hexagonal outline shape in the embodiment, wherein the inner circumference of the chamber 62 is hexagonal.
  • the head 61 may of course have different forms from the embodiment, for example, to optimally adapt to a particular screw head shape. It is understood that various versions or assortments are provided by the retaining screwdriver according to the invention, which are not only adapted to the size of various conventional screws in the electrical field, but are also adapted to different head shapes of screws.
  • the elastic part 4 of the insulating jacket allows some axial compression when the profile head 22 must be inserted deeper into a slot formation of a screw, for example, when the screw is recessed, but allows in particular an axial expansion of the insulating jacket such that the head 61 of the Isoliermülsenteils six can be pulled forward over the end of the screwdriver blade 2 to insert into the sideways opening chamber 62 a screw which protrudes with its shaft through the opening of the front end wall forward and whose head is located in the chamber 62.
  • the elastic part 4 seeks to retract the insulating sleeve part 6 back to its normal position.
  • the profile head blade tip engages in the slot or other formation of the screw head, so that the screw is held both positively and by the spring action frictionally in the head 61 and can be safely and effortlessly screwed.

Description

Die Erfindung betrifft einen elektrisch isolierten Schraubendreher, und zwar einen Festhalte-Schraubendreher, mit dem gefahrlos an unter Spannung stehenden elektrischen Anlagen gearbeitet werden kann.The invention relates to an electrically insulated screwdriver, namely a retaining screwdriver, which can be safely worked on under voltage electrical equipment.

Es ist oftmals notwendig oder wünschenswert, an elektrischen Anlagen, insbesondere Schalt- oder Verteileranlagen, zu arbeiten, ohne die gesamte Anlage, die möglicherweise eine Vielzahl von Stromkreisen umfasst, außer Betrieb setzen zu müssen.It is often necessary or desirable to operate on electrical equipment, particularly switchgear or distribution equipment, without having to decommission the entire equipment, which may include a variety of electrical circuits.

Dabei kann es auch erforderlich sein, Schrauben einzudrehen, beispielsweise an Klemmen, wobei stets das Problem besteht, dass man die Schraube festhalten muß, bis sie ein Stück weit eingedreht ist, oder auch beim Herausdrehen einer Schraube, damit sie nicht in die Anlage hinein herunterfällt. Das ist an elektrischen Anlagen, insbesondere in Schaltschränken und Verteilerschränken, auch dann gefährlich, wenn der jeweilige Stromkreis abgeschaltet ist, wenn in daneben liegenden Bereichen spannungsführende Komponenten oder Anschlüsse vorhanden sind. Um eine Schraube, die einzudrehen ist, nicht von Hand festhalten zu müssen, ist es wünschenswert, die Schraube mit dem Werkzeug selbst festzuhalten, so dass die Arbeitsperson nicht mit der Hand in die Nähe spannungsführender Teile greifen muß und bei Unachtsamkeit in Berührung mit spannungsführenden Teilen kommt.It may also be necessary to screw in screws, for example, to terminals, where there is always the problem that you have to hold the screw until it is screwed in a bit, or even when unscrewing a screw so that it does not fall into the system , This is dangerous in electrical installations, especially in cabinets and distribution cabinets, even if the respective circuit is switched off, if live components or connections are present in adjacent areas. In order to avoid having to manually hold a screw to be screwed in, it is desirable to hold the screw with the tool itself, so that the worker does not have to grab by hand near live parts and if inadvertently in contact with live parts comes.

Dazu bedarf es allerdings eines Werkzeugs, das zuverlässig isoliert ist, um sowohl einen zuverlässigen Berührungsschutz für die arbeitende Person zu gewährleisten als auch zuverlässigen Schutz gegen Erzeugen von Kurzschlüssen oder dergleichen zwischen nahe benachbarten blanken Teilen wie Anschlussdrähten, Schrauben, Klemmen oder dergleichen in elektrischen Anlagen, wenn beispielsweise das Werkzeug von einer Schraube abrutschen sollte, und das trotzdem eine Schraube verlässlich festhalten kann.However, this requires a tool that is reliably isolated to provide both a reliable contact protection for the working person and reliable protection against short circuits or the like between closely adjacent bare parts such as lead wires, screws, clamps or the like in electrical equipment, For example, if the tool should slip off a screw, and still be able to reliably hold a screw.

Aus der US 5 515 755 ist ein üblicher elektrisch isolierter Schraubendreher bekannt, dessen Schaft bis hinterhalb der Schraubendreherklinge von einem Isoliermantel umgeben ist, und auf den ein als separates Bauteil ausgebildeter ausgebildetes Festhalteteil aufsteckbar ist, das aus Metall oder Kunststoff hergestellt sein kann und zwei diametral gegenüberliegende, nach vorne ragende Zangenelemente aufweist.From the US 5 515 755 a conventional electrically insulated screwdriver is known, the shank is surrounded by an insulating jacket to the rear of the screwdriver blade, and on which a designed as a separate component trained retaining part can be plugged, which can be made of metal or plastic and two diametrically opposed, forwardly projecting pliers elements having.

Aufgabe der Erfindung ist es, einen den obigen Kriterien entsprechenden elektrisch isolierten Festhalte-Schraubendreher zu schaffen.The object of the invention is to provide an electrically isolated retaining screwdriver according to the above criteria.

Diese Aufgabe wird durch den im Anspruch 1 angegebenen Festhalte-Schraubendreher gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by the specified in claim 1 retaining screwdriver. Advantageous embodiments of the invention are the subject of the dependent claims.

Der erfindungsgemäße Festhalte-Schraubendreher wird nachfolgend unter Bezugnahme auf die anliegenden Zeichnungen in näheren Einzelheiten beschrieben. In den Zeichnungen zeigt:

Fig. 1
den Schraubendreher im Längsschnitt, und
Fig. 2
das vordere Isolierhülsenteil des Isoliermantels der Schraubendreherklinge mit der Schraubenfesthaltemechanik.
The retaining screwdriver according to the invention will be described in more detail below with reference to the accompanying drawings. In the drawings shows:
Fig. 1
the screwdriver in longitudinal section, and
Fig. 2
the front Isolierhülsenteil of the insulating jacket of the screwdriver blade with the Schraubenfesthaltemechanik.

Der Schraubendreher weist in üblicher Weise einen Griff 1 aus elektrisch isolierendem Kunststoff und eine Klinge 2 auf, die einen langen, mit seinem rückwärtigen Endbereich drehfest im Griff 1 verankerten Schaft 21 aus Metall, nämlich einem geeigneten Werkzeugstahl, und einen vorderen Profilkopf 22 aufweist.The screwdriver has in the usual way a handle 1 made of electrically insulating plastic and a blade 2, which has a long, with its rear end rotatably anchored in the handle 1 shank 21 made of metal, namely a suitable tool steel, and a front profile head 22.

Die Klinge kann eine Kreuzschlitzklinge sein, wie dargestellt, oder jede andere gebräuchliche Klingenform haben, worunter beispielsweise auch ein Sechskant zum Eingriff in Innensechskantschrauben zu verstehen ist.The blade may be a cross-slotted blade, as shown, or any other conventional blade shape, including, for example, a hex for engagement in Allen screws to understand.

Der Schaft 21 ist über seine gesamte Länge bis unmittelbar zur Klingenspitze elektrisch durch einen Isoliermantel (Teile 3 bis 6) isoliert.The shaft 21 is electrically insulated over its entire length to directly to the blade tip by an insulating jacket (parts 3 to 6).

Der Isoliermantel besteht aus mehreren Teilen, nämlich aus einem sich an den Griff 1 anschließenden und um die Klinge 2 herum in den Griff eintauchenden Buchsenteil 3, einem dieses übergreifend damit verbundenen, in axialer Richtung elastischen Teil 4, einem sich wieder daran anschließenden Buchsenteil 5, und einem sich vorne an dieses anschließenden, sich über die restliche Länge des Klingenschafts 21 erstreckenden Isolierhülsenteil 6.The insulating jacket consists of several parts, namely a socket part 3 adjoining the handle 1 and immersed in the handle around the blade 2, a sleeve part connected thereto in an axial direction, a part 4 which is again connected thereto, and an insulating sleeve part 6, which adjoins this front, extending over the remaining length of the blade shaft 21.

Die konkrete Ausgestaltung des Isoliermantels mit dem zwischen den beiden Hülsenteilen 3 und 5 verlaufenden, axial elastischen Teil 4 ist nur beispielhaft. Die Ausbildung kann auch abgewandelt werden. Es kommt lediglich darauf an, daß der Isoliermantel im Verlauf seiner axialen Länge ein axial elastisches Zwischenstück aufweist, das eine Stauchung und insbesondere eine Dehnung des Isoliermantels in axialer Richtung zulässt.The concrete embodiment of the insulating jacket with the running between the two sleeve parts 3 and 5, axially elastic part 4 is only an example. The training can also be modified. It is only important that the insulating jacket in the course of its axial length has an axially elastic intermediate piece, which allows a compression and in particular an expansion of the insulating jacket in the axial direction.

Auch die Ausbildung des Isoliermantels aus mehreren Teilen ist nur beispielhaft. Der Isoliermantel kann auch einstückig ausgebildet sein oder aus zwei miteinander verbundenen Teilen bestehen. Eine einstückige Ausbildung kann vorteilhaft sein im Hinblick auf Festigkeitsüberlegungen, da der Isoliermantel auch ausreichend auf Zug belastbar sein muss. Er muss axial in dem notwendigen Maße dehnbar sein, und der vordere, zum Halten der Schraube dienende Bereich des Isoliermantels muss ausreichend steif sein, um die Haltefunktion zuverlässig erfüllen zu können. Allerdings steht bei einem einstückigen Isoliermantel auch bei relativ großer Steifigkeit des Materials eine große axiale Länge zur Verfügung, über welche der erforderliche Dehnungsweg verteilt werden kann.The formation of the insulating jacket of several parts is only an example. The insulating jacket may also be integrally formed or consist of two interconnected parts. A one-piece design may be advantageous in terms of strength considerations, since the insulating jacket must be sufficient to train sufficient load. It must be axially expandable to the necessary extent, and the front area of the insulating jacket serving to hold the screw must be sufficiently rigid to reliably perform the holding function. However, with a one-piece insulating jacket, even with a relatively high rigidity of the material, a large axial length is available over which the required expansion path can be distributed.

Der vordere Isolierhülsenteil 6 ist in Figur 2 gesondert dargestellt, und zwar in perspektivischer Ansicht, so dass insbesondere die Ausbildung von dessen Kopfteil 61 klar ersichtlich ist.The front Isolierhülsenteil 6 is in FIG. 2 shown separately, in a perspective view, so that in particular the formation of the head part 61 is clearly visible.

Dieser Kopfteil 61 ist hohlkastenartig ausgebildet, wobei die darin gebildete Kammer 62 durch eine vordere Stirnwand abgeschlossen ist und eine seitwärts ausmündende Öffnung hat. Die vordere Stirnwand hat eine mittige, sich ebenfalls seitwärts schlitzartig öffnende Öffnung, durch die, wie in Figur 1 sichtbar ist, der vordere Profilkopf 22 der Schraubendreherklinge 2 hindurchragen kann. Der Kopfteil 61 hat beim Ausführungsbeispiel eine sechseckige Umrissform, wobei auch der Innenumfang der Kammer 62 sechseckig ist.This head part 61 is formed like a hollow box, wherein the chamber 62 formed therein is closed by a front end wall and has a side opening out opening. The front end wall has a central, also sideways slot-like opening through which, as in FIG. 1 is visible, the front profile head 22 of the screwdriver blade 2 can protrude. The head part 61 has a hexagonal outline shape in the embodiment, wherein the inner circumference of the chamber 62 is hexagonal.

Auch der Kopf 61 kann natürlich vom Ausführungsbeispiel abweichende Formen haben, beispielsweise um sich einer bestimmten Schraubenkopfform optimal anzupassen. Es versteht sich, dass von dem erfindungsgemäßen Festhalte-Schraubendreher verschiedene Versionen oder Sortimente vorgesehen sind, die nicht nur an die Größe verschiedener gebräuchlicher Schrauben im Elektrobereich angepasst sind, sondern auch unterschiedlichen Kopfformen von Schrauben angepasst sind.Of course, the head 61 may of course have different forms from the embodiment, for example, to optimally adapt to a particular screw head shape. It is understood that various versions or assortments are provided by the retaining screwdriver according to the invention, which are not only adapted to the size of various conventional screws in the electrical field, but are also adapted to different head shapes of screws.

Der elastische Teil 4 des Isoliermantels ermöglicht eine gewisse axiale Stauchung, wenn der Profilkopf 22 tiefer in eine Schlitzformation einer Schraube eingeführt werden muß, zum Beispiel wenn die Schraube versenkt angeordnet ist, ermöglicht aber insbesondere eine axiale Dehnung des Isoliermantels derart, dass der Kopf 61 des Isolierhülsenteils sechs nach vorne über das Ende der Schrauendreherklinge 2 gezogen werden kann, um in die seitwärts ausmündende Kammer 62 eine Schraube einzulegen, die mit ihrem Schaft durch die Öffnung der vorderen Stirnwand nach vorn hinaus ragt, und deren Kopf in der Kammer 62 liegt.The elastic part 4 of the insulating jacket allows some axial compression when the profile head 22 must be inserted deeper into a slot formation of a screw, for example, when the screw is recessed, but allows in particular an axial expansion of the insulating jacket such that the head 61 of the Isoliermülsenteils six can be pulled forward over the end of the screwdriver blade 2 to insert into the sideways opening chamber 62 a screw which protrudes with its shaft through the opening of the front end wall forward and whose head is located in the chamber 62.

Aufgrund seiner Elastizität sucht der elastische Teil 4 den Isolierhülsenteil 6 wieder in seine Normalposition zurückzuziehen. Dabei greift die Profilkopf-Klingenspitze in die Schlitz- oder sonstige Formation des Schraubenkopfes, so dass die Schraube sowohl formschlüssig als auch durch die Rückfederwirkung kraftschlüssig in dem Kopf 61 gehalten wird und sicher und mühelos eingedreht werden kann.Due to its elasticity, the elastic part 4 seeks to retract the insulating sleeve part 6 back to its normal position. In this case, the profile head blade tip engages in the slot or other formation of the screw head, so that the screw is held both positively and by the spring action frictionally in the head 61 and can be safely and effortlessly screwed.

Claims (4)

  1. An electrically insulated fixing screwdriver, with a handle (1) made of an electrically insulating material and a shaft (21) made of metal that is anchored in the handle (1) with its rear end region in a rotationally fixed manner, the shaft presenting on its front end a profiled head (22) conformed to the profile of the engagement region of a screw, and presenting an insulating sheath (3, 4, 5, 6) surrounding the shaft (21),
    characterised in that the insulating sheath (3, 4, 5, 6) has a part (4) that is flexible in an axial direction, and in that on the front end of the insulating sheath a head portion (61) is arranged that is configured like a hollow box and presents an aperture that opens to the side, as well as a central aperture on a front face also opening to the side, in the form of a slot through which the front end portion of the shaft (21) forming the profile head (22) can protrude.
  2. The screwdriver according to claim 1, wherein the insulating sheath is configured as at least two pieces and has a front insulating sleeve part (6) having the head part (61) on its front end, and has a flexible rear part (4) that is axially stretchable.
  3. The screwdriver according to claim 2, wherein the insulating sheath is made of three parts and presents a bushing part (3) anchored in the handle (1) with its rear end between the axially stretchable and flexible rear part (4)
  4. The screwdriver according to claim 2 or 3, wherein the front insulating sleeve part (6) is connected to the axially stretchable and flexible part (4) by means of a bushing part (5).
EP13001021.8A 2012-03-02 2013-02-28 Electronically insulated fixing screw driver Active EP2633954B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012004036 2012-03-02

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Publication Number Publication Date
EP2633954A2 EP2633954A2 (en) 2013-09-04
EP2633954A3 EP2633954A3 (en) 2016-11-30
EP2633954B1 true EP2633954B1 (en) 2019-10-02

Family

ID=47845691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13001021.8A Active EP2633954B1 (en) 2012-03-02 2013-02-28 Electronically insulated fixing screw driver

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EP (1) EP2633954B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105666390A (en) * 2015-09-08 2016-06-15 余建桥 Anti-sliding and labor-saving screwdriver and auxiliary device of screwdriver

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190091A (en) * 1978-09-26 1980-02-26 Sebastian Zuppichin Screw, screwdriver and screw-holding attachment therefor
US5515755A (en) * 1994-01-03 1996-05-14 Kung; Sean H. Insulated fastener retainer for fastener driver

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
EP2633954A2 (en) 2013-09-04
EP2633954A3 (en) 2016-11-30

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