DE1168518B - Pressure screw of a screw terminal - Google Patents

Pressure screw of a screw terminal

Info

Publication number
DE1168518B
DE1168518B DESCH29562A DESC029562A DE1168518B DE 1168518 B DE1168518 B DE 1168518B DE SCH29562 A DESCH29562 A DE SCH29562A DE SC029562 A DESC029562 A DE SC029562A DE 1168518 B DE1168518 B DE 1168518B
Authority
DE
Germany
Prior art keywords
screw
grooves
pressure
face
terminal
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.)
Pending
Application number
DESCH29562A
Other languages
German (de)
Inventor
Dipl-Kfm Alois Schiffmann
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DESCH29562A priority Critical patent/DE1168518B/en
Priority to US174180A priority patent/US3191139A/en
Publication of DE1168518B publication Critical patent/DE1168518B/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/36—Conductive members located under tip of screw
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2475—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by screws, nuts or bolts
    • H01R4/2483—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by screws, nuts or bolts penetrating the area under the screw tip
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/49—Member deformed in situ
    • Y10T403/4974—Member deformed in situ by piercing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7041—Interfitted members including set screw
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/71—Rod side to plate or side
    • Y10T403/7129—Laterally spaced rods
    • Y10T403/7141—Plural channels in connector

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)

Description

Druckschraube einer Schraubklemme Die Erfindung bezieht sich auf eine Druckschraube einer Schraubklemme zum Festklemmen an isolierte elektrische Leitungen, deren Schraubenstirnseite mit Fräsnuten versehen ist. Diese sogenannte Frässchraube dient dazu, die Isolierschicht einer elektrischen Leitung, an der eine Abzweigleitung über die Schraubklemme angeschlossen werden soll, für die kontaktherstellende Stirnfläche der Druckschraube wegzufräsen. In der Praxis wird oft gefordert, daß eine Abzweigleitung an eine andere elektrische Leitung, z. B. an ein Stromversorgungskabel angeschlossen werden soll, ohne die Spannung dieses Stromversorgungskabels abschalten zu müssen. Hierfür wird die Schraubklemme an die stromführende Leitung angesetzt und die Druckschraube mittels eines isolierten Werkzeuges angezogen. Die Fräsnuten an der Stirnseite der Druckschraube zerstören dabei die Isolation der Leitung an dieser Stelle, so daß schließlich eine metallische Berührung zwischen der Stirnseite der Druckschraube und dem von der Isolation befreiten Leitungsteil erfolgt.Pressure screw of a screw terminal The invention relates to a Pressure screw of a screw terminal for clamping to insulated electrical lines, whose screw face is provided with milled grooves. This so-called milling screw serves to the insulating layer of an electrical line to which a branch line is to be connected via the screw terminal for the face making the contact mill away the pressure screw. In practice it is often required that a branch line to another electrical line, e.g. B. connected to a power supply cable without having to switch off the voltage of this power supply cable. For this purpose, the screw terminal is attached to the current-carrying line and the pressure screw tightened by means of an insulated tool. The milled grooves on the face of the Pressure screw destroy the insulation of the line at this point, so that finally, a metallic contact between the face of the pressure screw and the part of the line that has been freed from the insulation.

Bisher war es üblich, die Frässchraube mit einer Nut zu versehen, deren gleichbleibende Tiefe etwa ihrer Breite entsprach. Nachteilig ist bei dieser bekannten Frässchraube, daß die so ausgebildete Nut das von der Leitung abgeschabte Isolationsmaterial nur in beschränktem Umfang aufnehmen kann und somit beim Aufreiben einer starken Isolation bald verstopft ist.Until now it was common to provide the milling screw with a groove, whose constant depth roughly corresponded to their width. This is a disadvantage known milling screw that the groove formed in this way is scraped off from the line Insulation material can only absorb to a limited extent and thus when rubbing strong insulation is soon clogged.

Zur Vermeidung dieses Nachteils schlägt die Erfindung vor, daß die Fräsnuten aus der Mitte der Stirnseite sternförmig verzweigt sind und daß die Tiefe der Fräsnuten von der Mitte der Stirnseite zum Schraubenumfang zunehmend ausgebildet ist.To avoid this disadvantage, the invention proposes that the Milled grooves from the center of the face are branched in a star shape and that the depth the milling grooves increasingly formed from the center of the face to the screw circumference is.

Hierdurch wird erreicht, daß die Fräsnuten in dem Bereich, in dem mehr Isolationsmaterial abgearbeitet wird, nämlich amUmfang derSchraube, eine größere Menge Material aufnehmen können. Darüber hinaus entsteht durch die zunehmende Tiefe der Fräsnuten eine Schräge am Boden der Nuten, die ein Herausschieben des in den Nuten befindlichen Materials durch das nachfolgende Material ermöglicht.This ensures that the milling grooves in the area in which more insulation material is processed, namely at the circumference of the screw, a larger one Can absorb a lot of material. It also arises from the increasing depth of the milled grooves a bevel at the bottom of the grooves, which prevents the in the Grooves located material made possible by the following material.

Es ist bei Druckschrauben bekannt, die Stirnseite mit mehreren Fräsnuten zu versehen, die dreieckförmigen Querschnitt haben und eine gleichbleibende Tiefe aufweisen. Die Breite der Fräsnuten an ihrem offenen Ende beträgt dabei etwa ein Fünftel des Schraubendurchmessers. Dadurch ist es möglich, daß beim Einklemmen eines dünnen Leiters dieser von den Kanten der Nut mitgenommen und mit der Schraube beim Festziehen derselben gedreht wird.It is known for pressure screws that the end face has several milled grooves to be provided that have a triangular cross-section and a constant depth exhibit. The width of the milling grooves at their open end is about one Fifth of the screw diameter. This makes it possible that when one is jammed thin conductor this taken from the edges of the groove and with the screw at Tightening the same is rotated.

Dieser Nachteil wird verhindert, wenn gemäß der weiteren Ausbildung der Druckschraube nach der Erfindung die Breite der Fräsnuten kleiner als ein Zehntel des Schraubendurchmessers ist.This disadvantage is prevented if according to the further training the pressure screw according to the invention, the width of the milling grooves is less than a tenth of the screw diameter.

Es ist besonders zweckmäßig, die Fräsnuten zur Schraubenachse entgegen der Schraubrichtung geneigt anzuordnen, damit sieh das von der Isolation abgearbeitete Material noch besser aus den Fräsnuten herausschieben kann.It is particularly useful to counter the milling grooves to the screw axis to be arranged inclined to the screwing direction, so that you can see the processed from the insulation Material can be pushed out of the milled grooves even better.

Eine beispielhafte Ausführungsform der Druckschraube nach der Erfindung ist in der Zeichnung dargestellt, und zwar zeigt F i g. 1 eine Seitenansicht einer Klemme mit Druckschraube, F i g. 2 die Stirnseite einer erfindungsgemäßen Druckschraube, F i g. 3 einen Schnitt durch den Schaft der Schraube nach der Linie III-III in F i g. 2 und F i g. 4 eine Druckschraube in Seitenansicht.An exemplary embodiment of the pressure screw according to the invention is shown in the drawing, namely F i g. 1 is a side view of a Clamp with pressure screw, F i g. 2 the end face of a pressure screw according to the invention, F i g. 3 shows a section through the shaft of the screw along the line III-III in F. i g. 2 and F i g. 4 shows a pressure screw in side view.

Die Klemme 1, die um den nicht dargestellten elektrischen Leiter gelegt und mittels schwalbenschwanzförmiger Nuten durch den Bügel 2 geschlossen wird, nimmt in einem Gewinde die Druckschraube 3 auf. Zwischen der Stirnseite der Schraube und dem quer zur Leiterrichtung verlaufenden Schneiden 4 der Klemme wird der Leiter eingeklemmt. Mittels der Schraube 5 wird in bekannter Weise ein Abzweigleiter an der Klemme festgelegt.The terminal 1, which is placed around the electrical conductor, not shown and is closed by means of dovetail-shaped grooves through the bracket 2, takes the pressure screw 3 in a thread. Between the face of the screw and the cutting edge 4 of the terminal, which runs transversely to the direction of the conductor, becomes the conductor trapped. By means of the screw 5, a branch conductor is connected in a known manner fixed to the terminal.

Die Stirnseite 7 der Druckschraube 3 ist mit drei jeweils um 120° gegeneinander versetzten schmalen Fräsnuten 6 versehen. Die Tiefe der Fräsnuten 6 nimmt, wie F i g. 3 zeigt, von der Schraubenmitte zum Schraubenumfang zu. Vorzugsweise sind die Fräsnuten 6 zur Schraubenachse entgegen der Schraubrichtung geneigt, wie F i g. 4 zeigt.The end face 7 of the pressure screw 3 is three at 120 ° Narrow milling grooves 6 offset from one another are provided. The depth of the milled grooves 6 takes, as shown in FIG. 3 shows, from the screw center to the screw circumference. Preferably the milling grooves 6 are inclined to the screw axis opposite to the screwing direction, as F i g. 4 shows.

Claims (3)

Patentansprüche: 1. Druckschraube einer Schraubklemme zum Festklemmen an isolierte elektrische Leitungen, deren Schraubenstirnseite mit Fräsnuten versehen ist, dadurch gekennzeichnet, daß die Fräsnuten (6) aus der Mitte der Stirnseite (7) sternförmig verzweigt sind und daß die Tiefe der Fräsnuten (6) von der Mitte der Stirnseite (7) zum Schraubenumfang zunehmend ausgebildet ist. Claims: 1. Pressure screw of a screw terminal for clamping to insulated electrical cables, the screw face of which is provided with milled grooves is, characterized in that the Milled grooves (6) from the middle the end face (7) are branched in a star shape and that the depth of the milled grooves (6) from the center of the end face (7) to the screw circumference is increasingly formed. 2. Druckschraube nach Anspruch 1, dadurch gekennzeichnet, daß die Breite der Fräsnuten (6) kleiner als ein Zehntel des Schraubendurchmessers ist. 2. Pressure screw according to claim 1, characterized in that the width of the milling grooves (6) is less than one tenth the diameter of the screw. 3. Druckschraube nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Fräsnuten (6) zur Schraubenachse entgegen der Schraubrichtung geneigt sind. In Betracht gezogene Druckschriften: Französische Patentschrift Nr. 705 121; deutsches Gebrauchsmuster Nr. 1812 278.3. Pressure screw according to claim 1 or 2, characterized in that the milling grooves (6) are inclined to the screw axis counter to the screwing direction. Documents considered: French Patent No. 705 121; German utility model No. 1812 278.
DESCH29562A 1961-04-17 1961-04-17 Pressure screw of a screw terminal Pending DE1168518B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DESCH29562A DE1168518B (en) 1961-04-17 1961-04-17 Pressure screw of a screw terminal
US174180A US3191139A (en) 1961-04-17 1962-02-19 Tap connector and setscrew therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH29562A DE1168518B (en) 1961-04-17 1961-04-17 Pressure screw of a screw terminal

Publications (1)

Publication Number Publication Date
DE1168518B true DE1168518B (en) 1964-04-23

Family

ID=7431471

Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH29562A Pending DE1168518B (en) 1961-04-17 1961-04-17 Pressure screw of a screw terminal

Country Status (2)

Country Link
US (1) US3191139A (en)
DE (1) DE1168518B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0420060A1 (en) * 1989-09-28 1991-04-03 ARCUS ELEKROTECHNIK Alois Schiffmann GmbH Contact screw
DE102020104278A1 (en) 2020-02-18 2021-08-19 Wieland Electric Gmbh Piercing screw

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* Cited by examiner, † Cited by third party
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FR2058441A5 (en) * 1969-09-04 1971-05-28 Sicame Sa
FR2498016A2 (en) * 1981-01-09 1982-07-16 Verlant Beaurain Insulated tapping connector for cables under tension - has insulation piercing grip-screws and has rear projection allowing derivation cable to run parallel to cable under tension
FR2596209B1 (en) * 1986-03-20 1989-06-16 Verlant Beaurain MONOBLOCK BYPASS CONNECTOR, ESPECIALLY FOR LIVE POWER LINES
DE3740266A1 (en) * 1987-11-27 1989-06-01 Rxs Schrumpftech Garnituren CLAMPING DEVICE FOR PRODUCING A BRANCH ON THE MAIN LADDER OF A LIVE VOLTAGE CABLE
US5201678A (en) * 1991-11-06 1993-04-13 Homac Mfg. Company Set screw bus connector
WO1995013756A1 (en) * 1993-11-19 1995-05-26 Cross Medical Products, Inc. Spine rod anchors, spine rod connectors and nut alignment guide
FR2744288B1 (en) * 1996-01-30 1998-03-06 Simel CONNECTION CONNECTION FOR ELECTRIC LINE
EP0854538A3 (en) * 1997-01-20 1999-09-08 Fornitalia S.r.l. Grub screw for a connecting terminal of an electrical cable, adapted to pierce through the insulating sheath and establish the contact
GB9926519D0 (en) * 1999-11-10 2000-01-12 B & H Nottingham Ltd Insulation piercing bolt
FR2875955B1 (en) * 2004-09-27 2006-12-01 Mecelec Sa CONNECTOR, STARTING GRID FORMED WITH MULTIPLE CONNECTORS AND CONNECTING BOX EQUIPPED WITH SUCH A GRID
IT1398147B1 (en) 2009-07-08 2013-02-14 Pini TERMINAL FOR ELECTRICAL CONNECTIONS
US11264736B2 (en) * 2018-08-20 2022-03-01 Hubbell Incorporated Insulation piercing connector
CA3127076C (en) 2019-01-18 2023-08-15 Hubbell Incorporated Compression connectors with insulating cover
CN111769376A (en) * 2020-05-21 2020-10-13 国网浙江省电力有限公司嘉兴供电公司 Precession broken skin binding clip
DE102021128799A1 (en) * 2021-11-05 2023-05-11 Arcus Elektrotechnik Alois Schiffmann Gmbh CABLE BRANCH TERMINAL FOR ELECTRICAL CONNECTION OF A MAIN CONDUCTOR TO A BRANCH CONDUCTOR

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Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR705121A (en) * 1930-10-24 1931-06-01 C & F Schlothauer G M B H Connection terminal or similar part
DE1812278U (en) * 1960-03-02 1960-06-02 Anton Kathrein Aelteste Spezia CONNECTING CLAMPING DEVICE FOR TWO-WIRE ANTENNA, RIBBON AND HOSE CABLES.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0420060A1 (en) * 1989-09-28 1991-04-03 ARCUS ELEKROTECHNIK Alois Schiffmann GmbH Contact screw
DE102020104278A1 (en) 2020-02-18 2021-08-19 Wieland Electric Gmbh Piercing screw
DE102020104278B4 (en) 2020-02-18 2021-12-09 Wieland Electric Gmbh Piercing screw

Also Published As

Publication number Publication date
US3191139A (en) 1965-06-22

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