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DE800783C - Electromagnetic dowel fixation in the manufacture of concrete bodies - Google Patents

Electromagnetic dowel fixation in the manufacture of concrete bodies

Info

Publication number
DE800783C
DE800783C DE1948P0000446 DEP0000446D DE800783C DE 800783 C DE800783 C DE 800783C DE 1948P0000446 DE1948P0000446 DE 1948P0000446 DE P0000446 D DEP0000446 D DE P0000446D DE 800783 C DE800783 C DE 800783C
Authority
DE
Germany
Prior art keywords
formwork
dowel
steel
electromagnetic
manufacture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE1948P0000446
Other languages
German (de)
Inventor
Hermann Dr-Ing Meier
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.)
Deutsche Bundesbank
Original Assignee
Deutsche Bundesbank
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 Deutsche Bundesbank filed Critical Deutsche Bundesbank
Priority to DE1948P0000446 priority Critical patent/DE800783C/en
Application granted granted Critical
Publication of DE800783C publication Critical patent/DE800783C/en
Expired legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • E04B1/41Connecting devices specially adapted for embedding in concrete or masonry
    • E04B1/4114Elements with sockets
    • E04B1/4121Elements with sockets with internal threads or non-adjustable captive nuts

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Description

Oft ist die Einbetonierung von Stahldübeln bei Stahlbetonkörpern aller Art zweckmäßig. So werden z. B. bei Spannbetonschwellen solche verwendet zur Aufnahme der Verschraubung von Schiene und Unterlagsplatte. Die Dübel müssen meist mit großer Genauigkeit im Betonkörper sitzen, was bisher durch anfängliche Verschraubung vier Dübel finit der Stahlschalung erreicht wurde. Es ist sofort ersichtlich, daß dieses Einbauverfahren der Dübel beim Gebrauch großer Spannbetten erhebliche Schwierigkeiten bereitet, insbesondere wenn die Dübel am Boden der Schalung sitzen und selbst verhältnismäßig kurz sind. Die Verschraubung der Dübel mit der Stalilschallxiig zur Erreichung eifies genauen Sitzes muß von unten her erfolgen und muß auch von unten her wieder gelöst werden. Dies verlangt aber die Anordnung besonderer Gänge unter dem Spannbett, die so groß sein müssen, daß ein Mann hineinkriechen und dort arbeiten kann.Often, the setting in concrete of steel dowels in reinforced concrete bodies is everyone Kind of functional. So z. B. in prestressed concrete sleepers such used for recording the screw connection of the rail and the base plate. The dowels usually have to be large Accuracy sit in the concrete body, what so far by initial screwing four Dowel finite the steel formwork was achieved. It is immediately apparent that this Installation method of the dowels when using large clamping beds considerable difficulties prepares, especially when the dowels sit on the bottom of the formwork and even proportionally are short. The screwing of the dowels with the Stalilschallxiig to achieve eifies exact fit must be done from below and must also be released from below will. But this requires the arrangement of special aisles under the bed, which must be big enough for a man to crawl in and work there.

Wesentlich einfacher ist es, in solchen Fällen aiif eine Verschraubung zu verzichten und die sichere Festhaltung des Dübels an der Schalung durch magnetische Kraftwirkung zu erzielen. hierin liegt das Wesen der Erfindung.In such cases it is much easier to use a screw connection to do without and the secure holding of the anchor on the formwork by magnetic To achieve force effect. this is the essence of the invention.

Die Wirkungsweise wird in folgendem Beispiel erläutert: Abb. i zeigt den Dübel a im Betonkörper fest einbetoniert. Der Dübel besitzt eine Gewindehoiirung b.The mode of operation is explained in the following example: Fig. I shows the dowel a firmly concreted in the concrete body. The dowel has a threaded hole b.

"\lili. ? zeigt die Schraubfüllung c, die genau in die Gewindebohrung b paßt. Die Schraubfiillung c ist beispielsweise mit einem Aussparungsteller d und dem "Lentrierkegel e zu einem festen Stück vereinigt. Die Seliraubfü llung c wird zunächst ganz in den Dübel a eingedreht."\ lili.? shows the screw filling c, which is exactly in the threaded hole b fits. The screw filling c is for example with a recess plate d and the "Lentrierkegel e united to a solid piece. The Seliraubfü lling c is first screwed completely into the dowel a.

Wie Abb.3 zeigt, wird nuninehr der Gesamtkörper mit der Zentrierspitze c genau auf eine gleiche Aussparung f der Schalung g gestellt. Dann wird der Elektromagnet h unter Strom gesetzt, anfangs nur gering für die Dübelfixierung auf der Schalung ;, dann beim Einbringen und Rütteln (los Betolis mit größter Kraftwirkung. Der 1?lelctroniagliet lt ist daher in seiner Kraftwirkung so zu Beinessen, daß der Dübel unverrückbar sitzt gegenüber all den Kräften, die beim Einbringen und Rütteln des Betons auf den Dübel ausgeübt werden können. Nach Beendigung des Rüttelns wird der Strom wieder ausgeschaltet. Bei der Entsclialung des Betonkörpers entstehen nicht die geringsten \\'iderstsinde. Die Schraubfüllung 1<ißt sich leicht herausschrauben. Der Dübel bleibt im Hetonkörper.As Fig.3 shows, the entire body with the centering point is now c placed exactly on the same recess f in the formwork g. Then the electromagnet h electrified, initially only slightly for fixing the dowels to the formwork ;, then when introducing and shaking (los Betolis with the greatest force. The 1? lelctroniagliet According to it, the force of the leg eats in such a way that the dowel cannot be moved sits against all the forces that occur when pouring and shaking the concrete the dowel can be exercised. When the shaking is finished, the current will be restored switched off. Not the slightest occurs when the concrete body is desclialed \\ 'iderstsinde. The screw filling 1 <can easily be unscrewed. The dowel remains in the hetone body.

Claims (2)

PATF,NTANSPRCC11E i. Verfahren zum 1?iiil)riii",eii und Festlegen von Stahldübeln in Stalilbetonkörpern, dadurch gekennzeichnet, daß zuliäclist der Stahldübel selbst oder mit ihln fest verbundene Stahlteile (a, c) an die Schalung (g) angehalten und dann vermittels eines ihnl gegenüber, außerhalb derselben Schalung (g) angeordneten Elektroniagneten (h) durch Stromschluß an der Schalung (g) unverrückbar und lagesicher festgehalten und danach der ihn umschließende Beton eingebracht wird. PATF, NTANSPRCC11E i. Procedure for 1? Iiil) riii ", eii and setting of steel dowels in Stalilbetonkodies, characterized in that the Zuliäclist Steel dowels themselves or steel parts firmly connected to them (a, c) to the formwork (g) stopped and then by means of a himl opposite, outside the same formwork (g) Arranged electronic assemblies (h) cannot be moved due to a short circuit on the formwork (g) and held securely in position and then the concrete surrounding it is poured in. 2. Vorrichtung nach !\iispruch t, dadurch gekennzeichnet, daß der Kopf der Schraubfülliing (c) des Stahldübels (a, c) mit einem Zentrierkegel (c) versehen ist, der beim Fixieren in cine =\ussparung der Schalung (g) eingreift. 3. \-orriclitun;g nach .\nspruch i, dadurch gekeinizeichnet, dal.i der Elektromagnet (h) in seiner Kraftwirkung stufenweise veränderlich ausgebildet ist.2. Device according to! \ Iis Claim t, characterized in that the head of the screw filling (c) of the steel dowel (a, c) is provided with a centering cone (c), which when fixed engages in the recess of the formwork (g). 3. \ -orriclitun; g according to. \ Nspruch i, thereby denied that i the force of the electromagnet (h) is gradual is designed to be changeable.
DE1948P0000446 1948-10-02 1948-10-02 Electromagnetic dowel fixation in the manufacture of concrete bodies Expired DE800783C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1948P0000446 DE800783C (en) 1948-10-02 1948-10-02 Electromagnetic dowel fixation in the manufacture of concrete bodies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1948P0000446 DE800783C (en) 1948-10-02 1948-10-02 Electromagnetic dowel fixation in the manufacture of concrete bodies

Publications (1)

Publication Number Publication Date
DE800783C true DE800783C (en) 1950-12-07

Family

ID=577649

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1948P0000446 Expired DE800783C (en) 1948-10-02 1948-10-02 Electromagnetic dowel fixation in the manufacture of concrete bodies

Country Status (1)

Country Link
DE (1) DE800783C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19746111A1 (en) * 1997-02-21 1998-09-03 Hochtief Ag Hoch Tiefbauten Multi-section formwork body for manufacturing cut-back recesses such as anchor holes in concrete

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19746111A1 (en) * 1997-02-21 1998-09-03 Hochtief Ag Hoch Tiefbauten Multi-section formwork body for manufacturing cut-back recesses such as anchor holes in concrete
DE19746111C2 (en) * 1997-02-21 1999-02-04 Hochtief Ag Hoch Tiefbauten Multi-part formwork body for producing undercut recesses, especially anchor holes, in concrete

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