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(11) | EP 3 081 722 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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| (54) |
APPARATUS ARRANGED IN WOODEN POLE FOR REDUCING POLE DEFLECTION IN HOLZMAST ANGEORDNETE VORRICHTUNG ZUR VERRINGERUNG DER MASTBIEGUNG APPAREIL PLACÉ DANS UN POTEAU EN BOIS POUR RÉDUIRE LA DÉVIATION DE PÔLE |
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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 invention relates to an apparatus arranged in use in a wooden pole for reducing the deflection of the wooden pole when said wooden pole is subjected to a lateral tensile load affecting at a particular height.
[0002] Prior art knows guy ropes which are used to support wooden poles under lateral forces and which are installed between the top part of a wooden pole and a suitable fixing point usually built in the ground so that the guy rope prevents the wooden pole from deflecting in the direction of the pulling lateral load. Such guy ropes are awkward almost everywhere, such as in built-up areas, fields, and even forests, in particular because they are usually located transversely in relation to a power line, for example, spanning along the wooden poles. Other prior art solutions for supporting and reinforcing wooden poles are disclosed by DE 10 2009 005 735 A1, DE 20 2005 001 759 U1, US 4 934 675 and US 2005/0210821.
[0003] With the aid of the apparatus according to the invention, the deflection of a wooden pole, caused by a lateral load, may substantially be reduced by largely transferring the stress moment increasing towards the bottom part in conventional prior art poles into tensile and compression load. The apparatus according to the invention is characterised in that the apparatus includes a coupling element receiving said lateral tensile load, a mechanism which is connected to said coupling element and which, on its first arm portion, has a fixing point arranged with the chance to move in the direction of the tensile load, and a fixing point on a second arm portion is arranged with the chance to move in the vertical direction, whereby said arm portions are interconnected to move together by turning around a common axle, and in that the second arm portion is coupled by its fixing point to a counterpart adapted to form a base part of said wooden pole by means of a tensile member running in uses within said wooden pole.
[0004] An advantage of the invention is that a wooden pole will deflect less than prior art wooden poles by means of the apparatus according to the invention when lateral load is present. As a result, wooden poles may be used without guys as originating of terminating poles of, for example, overhead cables, without unaesthetic deflection being caused in them.
[0005] In the following, the invention will be explained in closer detail with reference to the accompanying drawing, in which
Figure 1 shows a prior art wooden pole deflected due to a load.
Figure 2 shows a wooden pole according to the invention essentially undeflected.
Figure 3 is a sectional view of a wooden pole according to the invention.
Figure 4 shows a wooden pole according to the invention on a metal base.
[0006] Figures 1 and 2 both show a wooden pole positioned on a sturdy base. The bases remain stationary, even if a force F loads the wooden poles in the lateral direction. The wooden pole in Figure 1 has a conventional structure and it deflects due to the load when stretch is created in said pole on the outer edge of the deflection arc. The wooden pole of Figure 2 has the apparatus according to the invention installed in it, which receives the tensile stress on behalf of the wooden structure through a tensile member 8 and thus reduces the deflection of the wooden pole to almost unnoticeable.
[0007] Figure 3 shows in greater detail a way to fix the tensile member 8 to the bottom part of a wooden pole to a metal baseplate by means of a counterpart 9, the tensile member 8 pulling the plate upward by a force Fy. The same baseplate also receives a downward force Fa from the right-hand side portion of the wooden pole 1. The mechanism according to the invention, capable of turning around an axle 7, transfers the force pulling on the coupling element 2 into force Fy pulling on the tensile member 8. The force is converted inversely proportional to the length of first 3 and second arm portion 5. Loading force from the mechanism transfers through the axle 7 to the right edge of the wooden pole into force Fa. Because wood can withstand compression force well, the right edge of the wooden pole will not give in even with considerable force Fa. The compression of the wood or the stretching of the tensile member 8 has no importance in this case, because said compression or stretching does not reduce the force causing them.
[0008] Figure 4 shows a wooden pole installed in a metal base 10. At the end of the tensile member 8 there is a nut that may be used to adjust the length of the tensile member 8. The wooden pole 1 is supported by a flange 11 in the top part of the base 10. The lower end of the tensile member 8 may be connected to said flange.
[0009] The fixing points 4, 6 of the first 3 and second arm portion 5 are substantially at a 90° angle with respect to each other in relation to the common axle 7.
[0010] Further, the common axle 7 included in the mechanism is arranged outside of the wooden pole 1 or substantially on the edge part of the pole 1.
[0011] The fixing point 4 belonging to the first arm portion 3 is located at least as far from the common axle 7 as the fixing point 6 of the second arm portion 5.
1. An apparatus arranged in use in a wooden pole (1) for reducing the deflection of said
wooden pole (1) when said wooden pole (1) is subjected to a lateral tensile load affecting
at a particular height, characterised in that the apparatus includes a coupling element (2) receiving said lateral tensile load,
a mechanism which is connected to said coupling element (2) and which, on its first
arm portion (3), has a fixing point (4) arranged with the chance to move in the direction
of the tensile load, and a fixing point (6) on a second arm portion (5) is arranged
with the chance to move in the vertical direction, whereby said arm portions (3) and
(5) are interconnected to move by turning around a common axle (7), and in that the second arm portion (5) is coupled in use by its fixing point (6) to a counterpart
(9) adapted to form a base part of said wooden pole (1) by means of a tensile member
(8) running in use within said wooden pole (1).
2. An apparatus as claimed in claim 1, characterised in that the fixing points (4); (6) of the first (3) and second arm portion (5) are substantially
at a 90° angle with respect to each other in relation to the common axle (7).
3. An apparatus as claimed in claim 1, characterised in that the common axle (7) included in the mechanism is arranged in use outside of the wooden
pole (1) or substantially on the edge part of the wooden pole (1).
4. An apparatus as claimed in claim 2, characterised in that the fixing point (4) belonging to the first arm portion (3) is located at least as
far from the common axle (7) as the fixing point (6) of the second arm portion (5).
5. An apparatus as claimed in claim 2, characterised in that the distance of the fixing point (4) belonging to the first arm portion (3) from
the common axle (7) is at least twice the distance of the fixing point (6) of the
second arm portion (5).
6. An apparatus as claimed in claim 1, characterised in that the first (3) and the second arm portion (5) are of the same structure.
1. Vorrichtung, die bei Verwendung in einem Holzmasten (1) angeordnet ist zum Verringern
der Auslenkung des Holzmastens (1), wenn der Holzmasten (1) einer seitlichen Zugbelastung
ausgesetzt ist, die sich auf eine bestimmte Höhe auswirkt, dadurch gekennzeichnet, dass die Vorrichtung ein Kupplungselement (2) aufweist, das die seitliche Zugbelastung
aufnimmt, einen Mechanismus, der mit dem Kupplungselement (2) verbunden ist und der
an seinem ersten Armabschnitt (3) einen Befestigungspunkt (4) aufweist, der mit der
Möglichkeit angeordnet ist, sich in Richtung der Zugbelastung zu bewegen und wobei
ein Befestigungspunkt (6) an einem zweiten Armabschnitt (5) mit der Möglichkeit angeordnet
ist, sich in die vertikale Richtung zu bewegen, wobei die Armabschnitte (3) und (5)
miteinander verbunden sind, um sich durch Drehen um eine gemeinsame Achse (7) zu bewegen,
und dass der zweite Armabschnitt (5) bei Verwendung durch seinen Befestigungspunkt
(6) mit einem Gegenstück (9) gekoppelt ist, das angepasst ist, ein Basisteil des Holzpfostens
(1) mittels eines Zuggliedes (8), das bei Verwendung innerhalb des Holzstabes (1)
verläuft, auszubilden.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Befestigungspunkte (4); (6) des ersten (3) und zweiten Armabschnitts (5) im Verhältnis
zu der gemeinsamen Achse (7) in Bezug zueinander im Wesentlichen in einem Winkel von
90° stehen.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die im Mechanismus enthaltene gemeinsame Achse (7) bei Verwendung außerhalb des Holzmastens
(1) oder im Wesentlichen an dem Randteil des Holzmastens (1) angeordnet ist.
4. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der Befestigungspunkt (4), der zu dem ersten Armabschnitt (3) gehört, zumindest so
weit entfernt von der gemeinsamen Achse (7) angeordnet ist, wie der Befestigungspunkt
(6) des zweiten Armabschnitts (5).
5. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der Abstand des Befestigungspunktes (4), der zu dem ersten Armabschnitt (3) gehört,
ab der gemeinsamen Achse (7) mindestens das Zweifache des Abstands des Befestigungspunktes
(6) von dem zweiten Armabschnitt (5) beträgt.
6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der erste (3) und der zweite Armabschnitt (5) aus der gleichen Struktur bestehen.
1. Appareil agencé en utilisation dans un poteau en bois (1) pour réduire la déviation
dudit poteau en bois (1) lorsque ledit poteau en bois (1) est soumis à une charge
de traction latérale agissant à une hauteur particulière, caractérisé en ce que l'appareil inclut un élément de couplage (2) recevant ladite charge de traction latérale,
un mécanisme qui est relié audit élément de couplage (2) et qui, sur sa première partie
de bras (3), présente un point de fixation (4) agencé avec la possibilité de se déplacer
dans la direction de la charge de traction, et un point de fixation (6) sur une seconde
partie de bras (5) est agencé avec la possibilité de se déplacer dans la direction
verticale, moyennant quoi lesdites parties de bras (3) et (5) sont reliées entre elles
pour se déplacer par rotation autour d'un axe commun (7), et en ce que la seconde partie de bras (5) est couplée en utilisation par son point de fixation
(6) à une contrepartie (9) adaptée pour former une partie de base dudit poteau en
bois (1) à l'aide d'un élément de traction (8) s'étendant en utilisation dans ledit
poteau en bois (1).
2. Appareil selon la revendication 1, caractérisé en ce que les points de fixation (4) ; (6) de la première (3) et seconde partie de bras (5)
sont sensiblement à un angle de 90° l'un par rapport à l'autre en relation avec l'axe
commun (7).
3. Appareil selon la revendication 1, caractérisé en ce que l'axe commun (7) inclus dans le mécanisme est agencé en utilisation à l'extérieur
du poteau en bois (1) ou sensiblement sur la partie d'arête du poteau en bois (1).
4. Appareil selon la revendication 2, caractérisé en ce que le point de fixation (4) appartenant à la première partie de bras (3) est situé au
moins aussi loin de l'axe commun (7) que le point de fixation (6) de la seconde partie
de bras (5).
5. Appareil selon la revendication 2, caractérisé en ce que la distance du point de fixation (4) appartenant à la première partie de bras (3)
de l'axe commun (7) est au moins deux fois la distance du point de fixation (6) de
la seconde partie de bras (5).
6. Appareil selon la revendication 1, caractérisé en ce que la première (3) et la seconde (5) partie de bras présentent la même structure.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.
Patent documents cited in the description