AN ARCH DECORATION FOR A WALL OPENING
Technical field
The present invention relates to an arch decoration for a wall opening, in- eluded in a set of two identical arch decorations joined together by means of an arch-facing running around the inner side of the wall opening.
Description of the invention
The arch decoration according to the invention is intended for a wall open- ing and forms part of a set of two identical arch decorations joined together by means of an arch facing running around the inner side of the wall opening. The arch decoration comprises two corner pieces designed to be placed on the wall at the corners of the wall opening and to be joined to each other, as well as to a strip placed on each side of the wall opening or to an additional component included in the arch decoration. The various components have joint surfaces corresponding to each other, by means of which they can be joined. Each corner piece has a section facing the wall opening and which is substantially in the shape of an arc. The protruding ends of the corner piece extend some way out from, or beyond, the arc, with constant cross-sectional profile, thereby permitting these ends to be cut at an optional point while still retaining their cross-sectional shape. The arc preferably consists of a 90° circular arc and extends between a vertical line and a horizontal line through the centre of the arc. The corner piece thus has one horizontally and one vertically protruding end.
One or more open grooves are arranged on the inside of each protruding end of the corner piece and continue out through their joint surfaces. Corresponding grooves are arranged in the other corner piece, and in the strips or other component included in the arch decoration. The grooves in all components in the arch decoration are placed identically in relation to each other, thereby permitting the components to be joined together by means of pins applied across each joint. In a preferred embodiment of the corner piece the protruding ends and the grooves in these ends are perpendicular to each other. The grooves in the corner piece extend from each joint surface along the respective protruding end and some way inside the defining lines of the arc so that the corner pieces can be cut along the defining lines, enabling two combined corner components to form a semicircular arch. The grooves in the strips extend longitudinally along the entire length of the strip, thus enabling these to be cut at an optional point along its length.
In a special embodiment of the arch decoration in accordance with the invention one of the protruding ends of the corner piece is longer than the other
end. This embodiment enables an arch to be created in which the upper part is horizontal and is surrounded by arc-shaped corner components. The joint between the two corner pieces may be marked with an intermediate piece that also has grooves like those on the corner pieces. The joint surface at at least one of the protruding ends of the corner piece may be arranged inclining towards its longitudinal direction, in which case an intermediate piece shall also have inclined joint surfaces. In another embodiment of the arch decoration in accordance with the invention a lengthening piece may be arranged between two corner pieces, with or without intermediate pieces. Further details and characteristics relating to the invention are revealed in the following description of the drawings and in the claims.
Description of the drawings
The invention is described below in the form of one embodiment by way of example, with reference to the accompanying sheet of drawings.
Figures 1 A-E show components included in an arch decoration in accordance with the invention comprising a corner piece as shown in figure 1A, a strip constituting the dressing of a door as shown in figure 1 B, a crown piece between corner piece and strip as shown in figure 1C, an intermediate piece intended to be placed between two corner pieces as shown in figure 1 D, and a floor block for placing between strip and floor. Figure 2 shows an alternative embodiment of a corner piece.
Figure 3 shows a lengthening piece for placing between two corner pieces, with or without intermediate pieces.
Figure 4 shows an alternative embodiment of an intermediate piece.
The arch decoration illustrated in figures 1 A-D, only one side of which is shown in the drawings, comprises two corner pieces 10, as in figure 1A, intended for placing on the wall at each upper corner of a wall opening to smooth the tran- sition at the corners of the wall opening. The vertical sides of the wall opening are covered by strips 11 , as in figure 1 B, intended to constitute the "dressings of the door". A crown piece 12, as in figure 1C is designed to give an attractive transition between the corner piece 10 and the strip 11. An intermediate piece 13, as in figure 1 D, is intended to provide a corresponding transition between the two corner pieces 10. The horizontal part 10.1 of the corner piece 10 can be cut to the desired length depending on the breadth and height of the wall opening. The strip 11 constituting the "dressing of the door" may be cut to optional length and adjusted to a desired placing of the crown piece 12 in vertical direction. The intermediate
piece 13 is usually placed centrally in the wall opening. A floor block 14, shown in figure 1 E, is intended for insertion between the strip 11 and the floor.
Each corner piece 10 is provided with open grooves 15 running in the surface intended to abut the wall at the wall opening. Similar grooves 15 are arrang- ed with the same spacing in the strips 11 , the crown pieces 12, intermediate piece 13 and floor block 14. The grooves 15 extend the entire length of the strips 11 , crown pieces 12, intermediate piece 13 and floor block 14.
Two arch decorations, each comprising two corner pieces 10 and two strips 11 , as well as possibly two crown pieces 12, an intermediate piece 13 and two floor blocks 14 are intended to be applied on each wall surface at a wall opening and to be joined together by an arch facing, not shown in the drawings, which is inserted into grooves 16 facing each other that run in all the parts of the arch along the edge situated nearest the wall opening.
The components making up the arch decoration are joined together by pins 17, which are pressed down into the open grooves 15. The pins 17 are preferably glued into the grooves 15. The pins 9 at the crown piece 12 and the intermediate piece 13 may be of such a length that they protrude on both sides of the respective piece so that they simultaneously connect the crown piece 12 with both the upper piece 10 and the strip 11 and join the intermediate piece 13 to both cor- ner pieces 10 at the same time. Since the grooves 15 extend along the entire length of the strip 11 they can be cut to the desired length and still have grooves that continue out into the joint surface 1.1.
The corner piece 10 shown in figure 1A is symmetrical and has a section facing the wall opening which is shaped as a 90° arc and is defined by the lines I- I and ll-ll in figure 1A. The horizontal and vertical ends of the corner piece 10 extend some way out, with constant cross-sectional profile, from the lines l-l and ll-ll marking the arc, and can therefore be cut to desired length while still providing an identical joint between the upper piece 10 and the adjacent pieces. If a semicircular arch is desired, each upper piece 10 can be cut along the vertical line l-l on one of the corner pieces 10 and joined without the intermediate piece 13. To enable this the grooves 15 are arranged to extend some way inside the defining lines l-l, ll-ll so that pins 17 can be inserted in the joint between the corner pieces 10. If corner pieces 10 of the same shape are to be used for both the left and the right side of the wall opening in a semicircular arch, each upper piece shall also be cut along the horizontal line ll-ll of the corner piece 10 in figure 1A.
The corner piece 10 illustrated in figure 2 is asymmetrical and shows a horizontal section, with constant cross-sectional shape, that is longer than the equivalent vertical section. This embodiment of the corner piece 10 is intended for
use in particularly wide wall openings and to be joined by means of an intermediate piece 13. If the wall opening is extremely wide a lengthening piece 18, as in figure 3, may be used either together with symmetrical corner pieces 10, or two asymmetrical corner pieces 10, depending on the aesthetic considerations. The horizontal section of the corner piece 10 may also be connected to an intermediate piece 13 where the joint surfaces do not extend at right angles to the horizontal line, but may incline towards this as shown in figure 4. In principle a crown piece 12 may also be given this shape.