DE3921874A1 - Screw with a countersunk recess in the head, a right-handed and a left-handed thread being located on the inner wall of said recess. Screwdriver with complementary threads on the outer border of the part which is screwed into the countersunk recess in order to screw in, and unscrew, the screw - Google Patents

Screw with a countersunk recess in the head, a right-handed and a left-handed thread being located on the inner wall of said recess. Screwdriver with complementary threads on the outer border of the part which is screwed into the countersunk recess in order to screw in, and unscrew, the screw

Info

Publication number
DE3921874A1
DE3921874A1 DE19893921874 DE3921874A DE3921874A1 DE 3921874 A1 DE3921874 A1 DE 3921874A1 DE 19893921874 DE19893921874 DE 19893921874 DE 3921874 A DE3921874 A DE 3921874A DE 3921874 A1 DE3921874 A1 DE 3921874A1
Authority
DE
Germany
Prior art keywords
screw
recess
handed
screwed
countersunk recess
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.)
Ceased
Application number
DE19893921874
Other languages
German (de)
Inventor
Juergen Hoehler
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.)
HOEHLER JUERGEN DIPL VOLKSW
Original Assignee
HOEHLER JUERGEN DIPL VOLKSW
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 HOEHLER JUERGEN DIPL VOLKSW filed Critical HOEHLER JUERGEN DIPL VOLKSW
Priority to DE19893921874 priority Critical patent/DE3921874A1/en
Publication of DE3921874A1 publication Critical patent/DE3921874A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/02—Shape of thread; Special thread-forms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0084—Specially shaped nuts or heads of bolts or screws for rotations by a tool with a threaded engagement between the head of the bolt or screw and the tool

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)

Abstract

The screw head or the shank end of the screw connection has a countersunk recess (2), two internal threads which run one above the other, a right-handed and a left-handed thread, being provided (3) on the inner border of said recess. On the outer border of the part which is screwed into the countersunk recess, the screwdriver likewise has right-handed and left-handed threads running one above the other (Figure 2). They are complementary to the internal threads of the countersunk recess. In order to screw in the screw or the screw connection, this part of the screwdriver is screwed into the countersunk recess corresponding to the direction of the external thread of the screw or of the screw connection. If the end of the countersunk recess is reached, the screw or the screw connection can be screwed into the workpiece. If the screwing procedure has been completed, the screwdriver can be unscrewed in the opposite direction. Unscrewing the screw or the screw connection takes place in a similar manner, but in opposite directions of rotation in each case. <IMAGE>

Description

Eine Schraube oder eine Schraubverbindung dient im wesentlichen dazu, lösbare oder nicht lösbare Verbindungen herzustellen. Beim Herstellen der Verbindung wird die Schraube oder die Schraubverbindung mit Hilfe eines Eindrehwerkzeuges eingedreht und beim Lösen mit Hilfe eines Ausdrehwerkzeuges ausgedreht. Ein- und Ausdrehwerkzeug sind meist identisch.A screw or a screw connection essentially serves to be releasable or make non-detachable connections. When connecting is the screw or the screw connection using a Screwing tool turned in and when loosening with the help of a turning tool turned out. Screwing and unscrewing tools are mostly identical.

Sowohl beim Ein- als auch beim Ausdrehen sind die Schraube und das Drehwerkzeug bei den üblichen Schrauben und Werkzeugen meist nicht fest miteinander verbunden. Somit ist es nicht möglich, die Schraube ohne ein zusätzliches Hilfsinstrument, im einfachsten Fall die Finger der menschlichen Hand, an die Stelle, an der sie eingedreht werden soll, heranzuführen. Hinzu kommt, daß Schraube und Drehwerkzeug beim Eindrehen keine für schwierige Anwendungen notwendige genaue axiale Verbindung gewährleisten. So kann z.B. eine selbstschneidende Schraube den gewünschten Eindrehwinkel verlassen: die Schraube wird schief sitzen. Infolge der fehlenden axialen Verbindung von Schraube und Eindrehwerkzeug kann die zum Eindrehen notwendige Kraft nicht mehr voll auf die Schraube übertragen und der zum Ein- und Ausdrehen notwendige radiale Druck nicht umgesetzt werden. Darüberhinaus kann eine nicht feste Verbindung zwischen Schraube und Drehwerkzeug dazu führen, daß letzteres bei starkem Drehdruck aus dem üblicherweise im Schraubenkopf vorhandenen Längs- oder Kreuzschlitz herausspringt. Das führt meist zu beschädigten Schraubenköpfen und beschädigten Drehwerkzeugen. Wird beim Eindrehen die Hand benutzt, um die axiale Verbindung von Schraube und Drehwerkzeug herbeizuführen, kann das Drehwerkzeug beim Herausspringen die Hand verletzen.Both when screwing in and out, are the screw and that Turning tool usually not tight with the usual screws and tools connected with each other. Thus, it is not possible to remove the screw without one additional auxiliary instrument, in the simplest case the fingers of the human Hand to the point where it should be screwed in. In addition comes that screw and turning tool when screwing in not for difficult Applications ensure accurate axial connection necessary. For example, a self-tapping screw leave the desired screwing angle: the Screw will be crooked. Due to the lack of axial connection of The screw and screwing tool cannot do the force necessary for screwing in more fully transferred to the screw and that for screwing in and out necessary radial pressure can not be implemented. In addition, a not firm connection between screw and turning tool cause the latter with strong rotational pressure from the usually in the screw head existing longitudinal or cross slot pops out. That usually leads to damaged screw heads and damaged turning tools. Will be at Screwing the hand used to the axial connection of screw and To bring the turning tool, the turning tool can jump out Hurt hand.

Bei selbstschneidenden Schrauben, z.B. einer Holzschraube, kann die fehlende feste Verbindung dazu führen, daß die Schraube durch die Materialstruktur oder infolge ungenügendem Vorbohren abgelenkt wird. Durch den beim Eindrehen verwendeten Druck kann dann die Schraube umknicken und die Oberfläche des Werkstückes beschädigen.With self-tapping screws, e.g. a wood screw, the missing one firm connection cause the screw through the material structure or is distracted due to insufficient pre-drilling. By the when screwing in  used pressure can then bend the screw and the surface of the Damage the workpiece.

Ohne eine feste Verbindung zwischen Schraube und Drehwerkzeug ist es oft beschwerlich, eine Schraube an die Stelle heranzuführen, an der sie eingeschraubt werden soll. Das ist z.B. dann der Fall, wenn die Stelle im Werkstück vertieft sitzt oder die Schraube nicht von oben nach unten, sondern geneigt oder gar von unten nach oben an die Stelle herangeführt werden muß. Ebenso ist es oft schwierig, eine gelöste Schraube ohne eine feste Verbindung zwischen ihr und dem Drehwerkzeug aus einer Vertiefung herauszuziehen.It is often without a fixed connection between screw and turning tool difficult to insert a screw in the place where it to be screwed in. This is e.g. then the case when the position in Workpiece is recessed or the screw is not from top to bottom, but must be inclined or even brought up to the point from bottom to top. Likewise, it is often difficult to get a loosened screw without a tight connection pull it out of a recess between it and the turning tool.

Der Erfindung liegt die Aufgabe zugrunde, Schraube und Ein- und Ausdrehwerkzeug oder zwei oder mehrere miteinander zu verbindende schraubverbindungen fest, aber dennoch wieder lösbar miteinander zu verbinden.The invention is based, screw and on and the task Boring tool or two or more to be connected screw connections firmly, but still releasably together connect.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Schraube im Kopf oder die Schraubverbindung im Schaftende am Innenrand einer Senkausnehmung zwei übereinanderlaufende Innengewinde, und zwar ein Rechts- und ein Linksgewinde, und das Ein- und Ausdrehwerkzeug (z.B. ein Schraubenzieher) am Außenrand des Teils, der in die Senkausnehmung der Schraube oder der Schraubverbindung eingedreht werden soll, zwei den Innengewinden der Schraube oder der Schraubverbindung entsprechende Außengewinde aufweist.This object is achieved in that the screw in the head or the screw connection in the shaft end on the inner edge of a countersink recess two overlapping internal threads, one right and one Left-hand thread, and the screwing and unscrewing tool (e.g. a screwdriver) on Outer edge of the part that fits into the countersunk recess of the screw or Screw connection should be screwed in, two the internal threads of the screw or the screw connection has corresponding external threads.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daßThe advantages achieved by the invention are in particular that

  • - Schraube und Drehwerkzeug oder zwei oder mehrere Schraubverbindungen während des Schraubvorgangs miteinander verbunden sind, und zwar genau axial;- screw and turning tool or two or more Screw connections with each other during the screwing process are connected, exactly axially;
  • - weder Schraube, noch Drehwerkzeug, noch Schraubverbindung während des Schraubvorgangs aus der axialen Verbindung ausbrechen können und es nicht zu Beschädigungen kommt;- Neither screw, nor turning tool, nor screw connection during the screwing process can break out of the axial connection and there is no damage;
  • - Schraube oder Schraubverbindung leicht an die Stelle, an der sie eingeschraubt werden soll, herangeführt und dort fixiert werden kann; - Screw or screw connection slightly in the place where it to be screwed in, brought in and fixed there can;  
  • - Schraube oder Schraubverbindung leicht aus Vertiefungen herausgeholt und leicht aus jedem Schraubloch mit Hilfe des Drehwerkzeuges herausgenommen werden kann, ohne daß die Gefahr besteht, daß sie herausfällt und verlorengeht oder dadurch Schäden anrichtet;- Screw or screw connection easily from recesses removed and easily from each screw hole with the help of Turning tool can be removed without the risk exists that it falls out and is lost or thereby damaged wreaks;
  • - Eindrehen und Ausdrehen der Schraube mit demselben Drehwerkzeug durchgeführt werden kann.- Screw in and unscrew the screw using the same turning tool can be carried out.

Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels im Zusammenhang mit der beiliegenden Zeichnung näher erläutert.In the following the invention using an exemplary embodiment in Connection explained in more detail with the accompanying drawing.

Die Fig. 1 zeigt einen Schnitt durch den Kopf einer Kopfschraube. Fig. 1 shows a section through the head of a cap screw.

In Übereinstimmung mit dem Patentanspruch weist der Kopf (1) eine Senkausnehmung (2) auf. An der Innenwand der Senkausnehmung befinden sich ein Rechts- und ein Linksgewinde (3).In accordance with the claim, the head ( 1 ) has a countersink recess ( 2 ). There is a right-hand and a left-hand thread ( 3 ) on the inner wall of the countersink recess.

Fig. 2 zeigt die Seitenansicht des Teils eines Drehwerkzeuges, der die Erfindung betrifft. An der Außenwand des Teils, der in die Senkausnehmung der Schraube oder der Schraubverbindung eingedreht werden soll, befinden sich ein Rechts- und ein Linksgewinde komplementär zu den Innengewinden der Senkausnehmung. Fig. 2 shows the side view of the part of a turning tool which relates to the invention. On the outer wall of the part that is to be screwed into the countersunk recess of the screw or screw connection, there are right-hand and left-hand threads complementary to the internal threads of the countersunk recess.

In eine so ausgebildete Schraube wird das Drehwerkzeug zum Eindrehen der Schraube entsprechend der Richtung des Außengewindes der Schraube - rechts oder links - in das Innengewinde der Schraube eingedreht. Sobald das Ende des Innengewindes erreicht ist, ist die axiale Verbindung hergestellt. Die Schraube kann nun an die zum Eindrehen vorgesehene Stelle am Werkstück herangeführt und eingedreht werden. Nach erfolgtem Eindrehen der Schraube kann das Drehwerkzeug in entgegengesetzter Richtung wieder ausgedreht werden; die Schraube verbleibt fest im Werkstück.In a screw designed in this way, the turning tool for screwing the screw in according to the direction of the external thread of the screw - right or left - is screwed into the internal thread of the screw. As soon as the end of the internal thread is reached, the axial connection is established. The screw can now be brought to the point on the workpiece intended for screwing in and screwed in. After the screw has been screwed in, the turning tool can be unscrewed again in the opposite direction; the screw remains firmly in the workpiece.

Zum Ausdrehen der Schraube wird das Drehwerkzeug in der dem Außengewinde der Schraube entgegengesetzten Richtung in die Senkausnehmung eingedreht. Sobald das Ende des Innengewindes erreicht ist, kann die Schraube gelöst und aus jeder Stelle im Werkstück, an der sich die Schraube befindet, problemlos mit dem Drehwerkzeug herausgenommen werden.To unscrew the screw, the lathe tool is screwed into the external thread Screw in the opposite direction into the counterbore. As soon as the end of the internal thread is reached, the screw can be loosened and removed  with every point in the workpiece where the screw is located be removed from the turning tool.

Claims (2)

1. Schraube oder Schraubverbindung mit im Kopf oder im Schaftende vorgesehener Senkausnehmung zur Aufnahme eines Ein- und Ausdrehwerkzeuges, dadurch gekennzeichnet, daß die Senkausnehmung am Innenrand zwei übereinanderlaufende Innengewinde, und zwar ein Rechts- und ein Linksgewinde, aufweist.1. screw or screw connection provided in the head or in the shaft end recess for receiving a screwing and unscrewing tool, characterized in that the countersink on the inner edge has two overlapping internal threads, namely a right-hand and a left-hand thread. 2. Ein- und Ausdrehwerkzeug nach Anspruch 1, dadurch gekennzeichnet, daß der Teil, der in die Senkausnehmung der Schraube oder Schraubverbindung gedreht wird, am äußeren Rand zwei den der Innengewinde der Senkausnehmung entsprechende Außengewinde, und zwar ein Rechts- und ein Linksgewinde, aufweist.2. Screwing and unscrewing tool according to claim 1, characterized in that the Part that rotated into the countersunk recess of the screw or screw connection is, on the outer edge two that of the internal thread of the counterbore corresponding external threads, namely a right-hand and a left-hand thread, having.
DE19893921874 1989-07-04 1989-07-04 Screw with a countersunk recess in the head, a right-handed and a left-handed thread being located on the inner wall of said recess. Screwdriver with complementary threads on the outer border of the part which is screwed into the countersunk recess in order to screw in, and unscrew, the screw Ceased DE3921874A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893921874 DE3921874A1 (en) 1989-07-04 1989-07-04 Screw with a countersunk recess in the head, a right-handed and a left-handed thread being located on the inner wall of said recess. Screwdriver with complementary threads on the outer border of the part which is screwed into the countersunk recess in order to screw in, and unscrew, the screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893921874 DE3921874A1 (en) 1989-07-04 1989-07-04 Screw with a countersunk recess in the head, a right-handed and a left-handed thread being located on the inner wall of said recess. Screwdriver with complementary threads on the outer border of the part which is screwed into the countersunk recess in order to screw in, and unscrew, the screw

Publications (1)

Publication Number Publication Date
DE3921874A1 true DE3921874A1 (en) 1989-11-30

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Family Applications (1)

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DE19893921874 Ceased DE3921874A1 (en) 1989-07-04 1989-07-04 Screw with a countersunk recess in the head, a right-handed and a left-handed thread being located on the inner wall of said recess. Screwdriver with complementary threads on the outer border of the part which is screwed into the countersunk recess in order to screw in, and unscrew, the screw

Country Status (1)

Country Link
DE (1) DE3921874A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881400A1 (en) * 1997-05-26 1998-12-02 MiTek Industries GmbH Fastening screw, in particular tubular screw
US7051624B2 (en) * 2001-12-10 2006-05-30 Zbigniew Oleszek Security nut, bolt and screw
CN101126409B (en) * 2007-04-12 2010-05-26 陈伟明 Theft-proof screw bolt and the dedicated tool
EP2314418A1 (en) 2009-10-22 2011-04-27 Erwin Lidauer Screw and rotating tool for rotating a screw

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1082945A (en) * 1911-05-24 1913-12-30 Standard Company Safety set-screw.
US3482481A (en) * 1968-10-24 1969-12-09 Strohm Newell Bolt or nut head
GB1290109A (en) * 1970-03-03 1972-09-20
DE2451384A1 (en) * 1973-10-30 1975-05-22 Kobe Steel Ltd REINFORCING STEEL BAR WITH THREAD
EP0266969A1 (en) * 1986-11-03 1988-05-11 Hewlett-Packard Company Press-in locking post

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1082945A (en) * 1911-05-24 1913-12-30 Standard Company Safety set-screw.
US3482481A (en) * 1968-10-24 1969-12-09 Strohm Newell Bolt or nut head
GB1290109A (en) * 1970-03-03 1972-09-20
DE2451384A1 (en) * 1973-10-30 1975-05-22 Kobe Steel Ltd REINFORCING STEEL BAR WITH THREAD
EP0266969A1 (en) * 1986-11-03 1988-05-11 Hewlett-Packard Company Press-in locking post

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881400A1 (en) * 1997-05-26 1998-12-02 MiTek Industries GmbH Fastening screw, in particular tubular screw
US7051624B2 (en) * 2001-12-10 2006-05-30 Zbigniew Oleszek Security nut, bolt and screw
CN101126409B (en) * 2007-04-12 2010-05-26 陈伟明 Theft-proof screw bolt and the dedicated tool
EP2314418A1 (en) 2009-10-22 2011-04-27 Erwin Lidauer Screw and rotating tool for rotating a screw

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OAV Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1
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8131 Rejection