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(11) |
EP 0 557 261 B1 |
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EUROPEAN PATENT SPECIFICATION |
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Mention of the grant of the patent: |
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17.04.1996 Bulletin 1996/16 |
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Date of filing: 18.02.1993 |
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Apparatus for the manufacture of concrete columns
Vorrichtung zum Herstellen von Betonsäulen
Dispositif pour la fabrication de colonnes en béton
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Designated Contracting States: |
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AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE |
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Priority: |
21.02.1992 FI 920163 U
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Date of publication of application: |
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25.08.1993 Bulletin 1993/34 |
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Proprietor: PARTEK CONCRETE OY AB |
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SF-00501 Helsinki (FI) |
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Inventor: |
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- Virtanen, Olli
SF-21600 Parainen (FI)
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Representative: Örtenblad, Bertil Tore |
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Noréns Patentbyra AB
Box 27034
S-102 51 Stockholm
S-102 51 Stockholm (SE) |
| (56) |
References cited: :
EP-A- 0 311 145
EP-A- 0 440 591
DE-A- 2 243 933
LU-A- 85 372
US-A- 3 119 164
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EP-A- 0 340 185
EP-A- 0 490 856
GB-A- 276 737
US-A- 2 669 073
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| Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
|
[0001] The present invention relates to an apparatus for the manufacture of concrete columns,
the apparatus having a concrete-gunning unit and a column-grinding unit, the gunning
unit having a gun moving along a vertical boom and a grinding disc, by means of which
a concrete column is manufactured by gunning a concrete mix against a specific blank
turning about its axis, whereafter the hardened column is transferred to the grinding
unit, where the surface of the concrete column is ground and polished by means of
a second grinding device moving on a vertical boom (see e.g. EP-A-0 440 591).
[0002] The apparatus is used for manufacturing concrete columns by a concrete-gunning method
known
per se, described in a number of previous patent applications. After the gunning the fresh
concrete is cut and ground straight by means of a rotating tool. Concreting completed,
the fresh element is transferred, supported by its jig, to the hardening site. When
the element has hardened, it is detached from the jig or is lifted into a grinding
apparatus, in which it fits without centering, since the apparatus has the same rotating
and supporting devices. The surface of the element is ground down by about 2-4 mm,
for example with a diamond tool, whereby the aggregate is exposed, whereafter the
element is ground smooth by using polishing tools. All the methods described above
are known
per se. The manufacturing apparatus according to the invention is characterized in that
both the gunning unit and the grinding unit have tilting devices by means of which
the vertical booms can be tilted relative to the axis of the concrete column so that
conical columns are produced. By tilting the vertical booms of the fresh-working and
dry-working tools, a conical column can be produced as easily as can a straight one.
The saving in forms is emphasized in the conical column, since the making of a conical
form is expensive, and all that is needed in the apparatus according to the invention
is control of the travel direction of the moving devices. The actual gun has distance
control which enables the distance of the nozzles from the element to be maintained
unchanged even though the element narrows towards the upper end. The inner block of
the concrete column is of thin metal sheet and the steel reinforcement is conical.
The invention is described below in the form of an example, with reference to the
accompanying drawing, in which Figure 1 depicts the gunning unit in the apparatus
for manufacturing concrete columns, and
Figure 2 depicts the grinding unit in the manufacturing apparatus.
[0003] The apparatus for manufacturing concrete columns has a concrete-gunning unit 1 and
a column-grinding unit 2. The gunning unit has a gun 4, moving along a vertical boom
3, and a grinding disc 5. The gun 4 and the grinding disc 5 are located adjacently
and can be moved in the lateral direction for the steps required. The concrete mix
is sprayed through the nozzle of the gun against a blank rotating about its axis 6,
whereby a concrete column narrowing conically upwards is produced. Thereafter, the
surface of the column is smoothed by means of the grinding disc 5. When the concrete
column has hardened, it is transferred to the grinding unit, where the surface of
the concrete column is ground and polished by means of a second grinding device 8
moving along a vertical boom 7 in the grinding unit. Both the gunning unit 1 and the
grinding unit 2 have tilting devices 9, 10, by means of which the vertical booms can
be tilted relative to the axis 11 of the concrete column so that conical columns are
produced. The tilts are indicated with dot-dashed lines. Concrete columns manufactured
in an apparatus according to the invention can be used for construction purposes as
various vertical columns or even by combining cones to each other to produce angular
components of a desired shape.
1. An apparatus for manufacturing concrete columns, having a concrete-gunning unit (1)
and a column-grinding unit (2), the concrete-gunning unit having a gun (4) moving
along a vertical boom (3) and a grinding disc (5), by means of which a concrete column
is manufactured by gunning a concrete mix against a specific blank rotating about
its axis (6), whereafter the hardened column is transferred to the column-grinding
unit (2), where the surface of the concrete column is ground and polished by means
of a second grinding device (8), moving along a vertical boom (7), characterized in that both the concrete-gunning unit and the column-grinding unit have tilting
devices (9, 10) by means of which the vertical booms (3, 7) can be tilted relative
to the axis (11) of the concrete column so that conical columns are produced.
1. Vorrichtung zum Herstellen von Betonsäulen mit einer Beton-Kanonen-Einheit (1) und
einer Säulen-Schleif-Einheit (2), wobei die Beton-Kanonen-Einheit eine Kanone (4)
aufweist, die sich entlang eines vertikalen Baumes (3) bewegt, und eine Schleifscheibe
(5), womit eine Betonsäule dadurch hergestellt wird, daß ein Betongemisch gegen einen
speziellen Rohling gespritzt wird, der um seine Achse (6) umläuft, worauf die ausgehärtete
Säule zur Säulenschleifeinheit (2) überfuhrt wird, wo die Oberfläche der Betonsäule
mittels einer zweiten Schleifvorrichtung (8) geschliffen und poliert wird, die sich
ihrerseits entlang eines vertikalen Baumes (7) bewegt, dadurch gekennzeichnet, daß
die Beton-Kanonen-Einheit und die Säulen-Schleif-Einheit Kippvorrichtungen (9, 10)
aufweisen, mittels welcher die vertikalen Bäume (3, 7) relativ zur Achse (11) der
Betonsäule geneigt werden können, so daß konische Säulen erzeugt werden.
1. Appareil de fabrication de colonnes de béton, comportant une unité (1) de projection
de béton et une unité (2) de meulage de colonne, l'unité de projection de béton comportant
un organe de projection (4) se déplacant le long d'un mât vertical (3) et un disque
de meulage (5), au moyen duquel une colonne de béton est fabriquée en projetant un
mélange de béton contre une pièce brute spécifique tournant autour de son axe (6),
après quoi la colonne durcie est transférée à l'unité (2) de meulage de colonne, où
la surface de la colonne de béton est meulée et polie au moyen d'un second dispositif
de meulage (8), se déplaçant le long d'un mât vertical (7), caractérisé par le fait
que l'unité de projection de béton et l'unité de meulage de colonne possèdent toutes
les deux des dispositifs d'inclinaison (9, 10) au moyen desquels les mâts verticaux
(3, 7) peuvent être inclinés par rapport à l'axe (11) de la colonne de béton, de telle
sorte que des colonnes coniques soient obtenues.
