Method and product for flying of stretched flags
The invention relates to a method of flying with stretched flags such as flags stretched with banner arms in flagstaffs such as flagstaffs with fixed top knob and pulley and external flag line.
The invention moreover relates to products for hoisting, lowering and flying with stretched flags in flagstaffs such as flagstaffs with fixed top knob and pulley and external flag line.
It is known to fly with stationary stretched flags where the flag is e.g. stretched horizontally with a so-called banner arm. The advantage of flying with stretched flags is obviously that the flag can also be viewed in calm weather.
It has been found, however, that this prior art involves some drawbacks.
One of these drawbacks is that ordinary flagstaffs with a fixed top knob and a flag line pulley and external flag line can not be used for flying of stretched flags, in that the flag in this case can not be turned around the flagstaff when the wind changes direction.
This means that the stretched flag, which is suspended in an ordinary flagstaff will be destroyed by the wind pressure when this reaches a given force.
Stretched flags are therefore usually suspended in a relatively expensive flagstaff with rotatable top knob or flag line pulley and are hoist and lowered with a flag line internally lead in the flagstaff.
With the known technique the owners of ordinary flagstaffs with fixed top
knob and external flag line can not in practice fly with stretched flags.
It is therefore a purpose of the invention to improve the known method and product for flying with stretched flags.
The object of the invention is achieved by a method of the type stated in the introductory portion of claim 1 , which is characterized in that the item, which stretches the flag, such as a banner arm is suspended in a rotatable part.
In this way it thus becomes possible to turn the stretched flag with the direction of the wind, even though the flag is hoist in an ordinary flagstaff with both fixed top knob and flag pulley.
As stated in claim 2 it is also a characteristic of the invention that the rotatable part, in which the banner arm is suspended, is placed preferably above the top knob preferably with the axis of rotation situated on preferably the same line as the vertical central axis of the flagstaff.
Hereby it is achieved that the stretched flag can freely turn around an ordinary flagstaff without any angular limits.
Further preferred embodiments of the method of the invention are defined in claims 3 through 5.
As mentioned the invention also relates to products.
These products are characterized in that the flag is held stretched by an item such as a banner arm, which is suspended in a rotatable part, which is placed preferably above the top knob preferably with the axis of rotation situated on preferably the same line as the vertical central axis of the flagstaff and where the rotating part is mounted in the top of an hoisting rod
in which the flag line is fastened, and which is provided with a ring at the bottom, which fully or partly encloses the flagstaff.
Hereby it thus becomes possible to manufacture stationary stretched flags for application in all existing flagstaffs with a fixed top knob and flag line pulley and external flag line guidance.
The invention will now be explained more fully with reference to the drawings, in which:
Fig. 1 shows an example of hoisting or lowering of a stretched flag in an ordinary flagstaff with fixed top knob and flag line pulley and external flag line guidance.
Fig. 2 shows a stretched flag hoist in a flagstaff with fixed top knob and flag line pulley and external flag line guidance.
Fig. 3, like fig. 2, shows a stretched flag hoist in a flagstaff with fixed top knob and flag line pulley and external flag line guidance, but where the flag is rotated 180 degrees compared to fig. 2.
In fig. 1 is shown a flagstaff 9 with a fixed top knob 6, on which is mounted a fixed flag line pulley 11. The externally guided flag line 10 is after passage of the flag line pulley 11 fastened to a hook shaped hoisting rod 5, which is in the top mounted in the lower part of a rotatable part 4, in whose upper part is fixed a banner arm 2 for stretching of a flag 1.
The hoisting rod is in the bottom provided with a ring 8, which encloses the flagstaff 10, but has a greater inner diameter than the flagstaff's external diameter, whereby it is secured that the ring 8 easily slides along the flagstaff 9, when the hoisting rod 5 is raised or lowered via the flag line 10.
The banner arm 2 is provided with a cross-arm 3, which i.a. fastens the flag in the vertical direction, but is also provided with a ring 7, which encloses both the flagstaff 9 and the hoisting rod 5.
The ring 7 has an inner diameter, which has got a size that ensures that an angle 12 arises between the hoisting rod 5 and the flagstaff 9 as a result of the gravity's pull in the flag parts when the flag 1 is hoisted or lowered. The angle 12 must have such a size that it enables the flag parts, which are hoisted, including the rotatable part 4, to freely pass the top knob 6.
The cross-arm 3 can obviously be provided with one or more rings, similar to the shown 7, but in this case all the dimensions of these rings must be specified after the above-mentioned demand for the angle 12.
The flag line 10 will in a preferred embodiment be lead from the pulley 11 internally in the rings 7 and 8, which will give the easiest flag hoist- and lowering functionality.
It is a part of the present invention that the rings, which encloses the flagstaff 9, as the in 8 and 7 shown, are provided with an opening mechanism, and thus the whole arrangement on which the stretched flag is mounted can easily be fastened or removed from the flagstaff 9.
It is likewise a part of the present invention if the rings 7 and 8 fully or only partly encloses the flagstaff 9.
In fig. 2 is shown an example of a hoisted stretched flag 1 in a flagstaff with fixed knob 6 and flag line pulley.
Since the flag is stretched by the banner arm 2, which is fastened to the top
of the rotatable part 4, which is placed above the flag knob 6 with the rotational axis aimed at coinciding with the vertical central axis of the flagstaff, the flag 2 will freely and unrestrictedly be able to turn around the flagstaff 9.
In fig. 3 is shown the same preferred embodiment of the invention, which is also the basis of fig. 1 and fig. 2, but where the flag 1 comparred to fig. 2 is turned 180 degrees.
As it will appear from the figures and the description, it is with the invention made possible to fly with stretched flags in ordinary flagstaffs with fixed knob and/or flag line pulley and external flag line leading.