EP0557973B1 - Longitudinally adjustable roof tile - Google Patents

Abstract

The longitudinally displaceable interlocking roofing tile (1) is provided with an essentially uniform profiling on the upper side. The head interlocking part contains a head edge rib which extends over the entire width of the tile. In addition to a side interlocking part (5) and a top interlocking part (3), the tile also has a foot interlocking part (4) with an outer foot interlocking rib. In the region of troughs (614, 616), U-shaped ribs with oblique side walls on both U-legs are integrally formed on the rear side of the tile. The plaster fin on the foot side runs essentially in one level in the region of the side interlocking part and top interlocking part and of the elevated central zone (612). When placing the tile on the roof, a vertical side expansion joint is obtained. The interlocking roofing tile is to be resistant to frost, avoid damage during transportation and, despite the longitudinal displaceability when placed on the a roof, is to be sealed. The foot interlocking part (4) has, in the region of the troughs, in each case one chamber which is planar on the underside, encloses the U-rib and is adjoined by the outer foot interlocking rib. On the side (914) of the chamber, the plaster fin is drawn, in the form of a U, downwards to the edge of the tile. The surface of each trough (614, 616) is provided with a gently curved tongue which reaches as far as the plaster fin. <IMAGE>

Description

The invention relates to a longitudinally displaceable interlocking tile with a substantially constant top profile over its length and with a top edge rib extending over the entire width of the tile and a side, top and foot rebate part, the latter having an outer foot rebate rib and in the region of depressions each has U-shaped ribs on the back with sloping side walls on the two U-legs, which together with the foot rebate rib form a suitcase and the foot-side cleaning ridge in the area of the side and top rebate part and the raised midfield runs essentially level, a vertical side joint is created when the tile is covered.

From DE-U-90 05 384 a interlocking tile of the type just mentioned is known. The cleaning ridge runs flat and horizontally in the foot area from the side rebate edge to the top rebate edge of the brick. The troughs end in a relatively high, steeply rising footstep, as does the raised middle section, the side and top fold section.

When this known brick is pressed, boundary layers - in technical jargon called "Ingenpass tonsures" - can form in the material flow due to this course of the cleaning ridge and the formation of the foot step just mentioned, which later lead to flaking of the boundary layer under the influence of weather, especially frost .

This applies in particular to low pitched roofs because there the cullet has a higher moisture content due to the low roof pitch than is the case with steeper roofs.

The formation of a boundary layer also creates water voids, pinch folds and air bubbles, which can lead to transport and frost damage.

The previously known tile has an open side fold, which forms a vertical side joint when covered. In the area of the brick base, this joint continues as a gap that is freely exposed to the wind. The tightness of the roof covered in this way, in particular the four-tile corner resulting from covering, leaves something to be desired.

The invention has for its object to provide a hollow rebate tile of the type mentioned, which also serves three purposes, namely the frost resistance of the shards in the foot area, prevents transport damage and improves the tightness of the covering despite the longitudinal displaceability of the brick.

This object is achieved in that the case is flat on the underside and adjoins the outer foot rib and on the front of the case the plaster burr - following the cross section of the case - is pulled U-shaped down to the edge of the brick, whereby To improve the material flow during pressing and to minimize the body thickness, the surface of each trough with a flat curved tongue extends to the cleaning ridge.

In the invention, the foot-side cleaning ridge is shaped like a meander. In the area of the side and top rebate part as well as the raised middle field, the cleaning ridge runs approximately at a height, and in the area of the hollows it is U-shaped lowered at the bottom, the depressions being drawn down to the lowered cleaning ridge with a flat curve, in the form of a tongue. The flat-curved tongue extends over a case arranged on the underside, which in turn is pulled through with its side walls and with its underside to the base of the brick.

The curvature of the troughs and the design of the case just described allow an improved material flow, which prevents the formation of boundary layers. During pressing, the material can reach the cleaning burr opening with a flow velocity that is relatively constant over the cross section. Because of its flat curvature, the tongue is drawn far down to the cleaning ridge, so that different flow velocities are avoided when pressing within the material and an essentially homogeneous tone flow results.

The voids, air and water inclusions and textures found on the back of the tile in the prior art, no longer occur, since the clay flow is homogeneous. The design of the cases also contributes to this. The case walls extend to the brick base and thus form continuous flow channels for the clay material during pressing.

The inclined, flat side walls of the suitcase lie against the recesses in the recesses or the side walls of the recesses on the top of the brick. Together with the troughs, they form large-area sealing surfaces which, according to the "hat in hat" principle, lie in a V-shape and ensure high tightness.

The pulled-out tongue tongues avoid the high foot step criticized in the previously known brick. This not only optimizes the material flow during pressing, but also results in a more streamlined cascade shape when laying the tile on the roof, which reduces the overpressure area that always occurs on the tile surface when the roof flows horizontally. Within this overpressure area there is a risk that water will be driven under the roof skin by the side folds. If you reduce this overpressure, the roof becomes denser.

In order to increase the material flow in the area of the two cases and to improve the pressing out of the back of the brick, the foot part parallel to the outer foot rib can include an equally high central foot rib, which extends from the top edge of the tile edge to the first case and between the two cases.

This creates a foot groove between the two foot ribs, which is composed of two closed caverns. After the two rebate ribs are of the same height, they form a flat surface on the covered tile together with the caverns when covered. This condition increases the tightness, the caverns serve as swirl chambers.

In order to further optimize the material flow, an inner foot rib can advantageously be provided between the two suitcases. It serves to facilitate the flow of material to the side of the case walls. It also increases the density of the roof skin in the area of the middle field.

Depending on the design of the middle field, the inner foot rib can run in the same plane as the other two foot ribs or can be elevated in relation to them.

The flank of the inner foot fold rib facing the middle field can advantageously run in the same plane as the middle field walls of the two cases. This also improves the material flow.

In an advantageous development of the invention, each case has a cavity leaving a minimum body thickness to the surface of the trough. It prevents material from accumulating and stiffens the base of the brick. The cavity can have a web parallel to the rebate ribs, which facilitates the filling of the underside when the brick is pressed.

It is advantageous if the inclination of the flanks of the troughs - measured on a normal base area thereof - is also the same in the area of the curved tongue as in the center of the brick. The air in the foot area is streamlined over the troughs, the flanks deliberately form tear-off edges that create air vortices that run obliquely to the roof. The over area on the outside of the roof is reduced.

The same applies to the advantageous further development, in which the tongue tapers and narrows in the direction of the brick base. This also improves the material flow during pressing and optimizes the air flow. In addition, the water is drained into the interior of the hollows of the covered brick.

The generic interlocking tile has a hump in the foot area of the side rebate part, which is preceded by a water switch as a collector for the side rebate grooves. In a favorable manner, the cover fold part in the invention has an outer and middle cover fold rib which are connected on the foot side by a connecting rib which extends obliquely analogously to the course of this water switch up to a flank which forms the connection on the underside of the cover fold part to the trough. The connecting rib directs the water collected in the side rabbet over the water switch at an angle to the outside of the brick, whereby it reaches the hollow of the covered brick. The connecting rib serves as a top-level water guiding element, as it pushes the collected water to the side. The wind flowing in through the foot gap cannot flow into the side rebate grooves through this connecting rib.

In the category, the side rebate part has an outer and an inner side rebate groove as well as a pin of the top edge rib directed towards the side rebate groove.

This pin should advantageously extend in the extension of the inner side groove. Moving the pin increases the tightness in the critical four-brick corner.

While in the prior art the vertical side parting runs through to the top edge rib and presents itself as an upwardly open gap, in the invention the vertical side parting line ends before the pin. The tenon itself lies in the extension of the inner side groove when covered. The air that blows up through the vertical side parting line, including any rain and snow that may have blown with it braked in front of the spigot, the spigot itself being a barrier against blowing into the four-brick corner.

The passage to the four-tile corner is hindered by the double corner cut-out and a W-ribbing, which will be explained below. The pin forms, as it were, a head-side end block of the inner side groove and the vertical side parting line. It forces penetrating air away from the four-tile corner towards the neighboring hollow of its own brick, which means that any water that has reached the top edge of the head is drained again via the hollow. The unwanted penetration of rain and snow into the four-tile corner is significantly reduced.

With regard to this peg, it is advantageous if the tile in the top corner seam has an upper and lower corner cutout and in the extension of the top edge rib a rib is led around the corner cutouts to the edge of the tile, whereby the peg comes to rest in the lower corner cutout.

For the sake of simplicity, the W rib has the same height as the outer foot rib. It encloses the two corner cut-outs and represents a flow barrier to protect the four-tile corner. The outer W-leg ends approximately at right angles on the outer edge of the brick. When covered, it lies in front of the tenon of the neighboring tile and protects it from the influx of air, rain and snow.

The generic brick has a corner cutout in the side seam fold. In the invention, however, two corner cutouts are provided there. In order to improve the sealing in the four-tile corner, the outer foot rebate rib in the area of the foot side seam corner can also have a W-rib have, which is guided around these two corner cutouts. The outer W-leg runs parallel to the outside of the side edge of the tile edge and ends there freely. When covering, this W-rib lies in front of the W-rib of the covered neighboring tile, so that the four-tile corner is now secured three times. The free-ending W-leg runs parallel to the side edge of the tile and not only prevents this W-rib from being knocked off unintentionally, but also forms a lateral barrier against the inflow.

In order to further seal the four-tile corner, a block can be placed in front of the middle foot rebate rib in the foot deck seam corner, which creates the connection to the outer flank on the underside. When the tile is covered, the block is placed in the upper corner cut-out of the foot gusset.

The inner foot rebate rib, the block and the said flank of the trough together form a W-rib which, when covered, is placed around the corner cutouts of the foot side seam corner of the neighboring covered tile. In this way, the water switch of this brick and the water outflow from the side interlocking are shielded against blowing in. The water collected in the side rebate part of the covered neighboring tile can flow unhindered to the top of the tile of the next adjacent tile on the foot side without the risk that this water will be driven into the underside of the roof skin during the drainage. The block forms a vertical and horizontal closure in the area of the upper corner cutout of the adjacent covered tile. The side parting joint, which is open towards the front, is thus sealed at the side to ensure free water drainage from the water switch

The multiple W-folds of the tile according to the invention in the area of the four-tile corner is designed so that the longitudinal displaceability of the tile does not suffer, but the tightness is guaranteed.
The generic tile has a cusp in the foot seam corner, which represents the foot end of the side fold and at the same time forms the water switch for the drainage of the side fold.

In the invention, this cusp can be preceded by a plateau, which adjoins both the upper and the lower corner cutout and is lower than the cusp. This plateau forms a vertical sealing step to seal the vertical side parting gap that is open to the front when covering.

Together with a step in front of the middle of the middle rebate rib, which is arranged above the plateau when covered, it forms a stair seal in the very critical foot area of the covered bricks together with the rebate. The stair seal initially acts as a barrier to blowing in. If rain and water are blown in, it is braked so that the blown particles get into the water switch behind. There they rain and are carried away together with the water collected in the side folds. Further blowing into the side fold prevents the oblique connecting rib of the two side fold ribs arranged there.

For this purpose, a hollow can be provided between the step and the side fold, in which the hump lies when the roof is covered.

In order to remove any condensate that may be formed on the back, it is still advantageous if the walls of the step are directed towards the block and end there.

If the bricks are laid in rows, it can be advantageous if the inner rebate rib is higher than the middle and outer rebate rib and, if covered, engages in a top rebate groove on the raised central tile area in the head area of the covered brick. Now it can be favorable if the top rebate groove is preceded by a stop lug on the raised middle section. When pulled, the middle foot rib lies against this stop nose.

The top rebate groove also facilitates the vertical stacking of the tile according to the invention in the package. When stacking, namely, a stacking rib can engage, which is advantageously arranged between the two suspension lugs. It prevents the tiles from slipping even when a tile package is slanted on the roof.

In order to make the gap of the vertical side joint even closer, the inner side rebate rib on its outer flank to the inner side rebate groove can be provided with a shoulder that extends to the bottom of the groove and protrudes outward in cross section and is covered by a counter shoulder if covered located on the outer tile edge of the top seam part.

The same advantage is obtained if the side rebate-side brick edge has an outwardly projecting shoulder at the bottom, which is covered by a counter-paragraph when covered, which is located on the outer flank of the cover rebate part on the back of the brick.

Here too, the gap between the bricks is increased by increasing the gap area and attaching the heels. The friction reduces the flow velocity and thus the blowing in.

Fig. 1

eine Draufsicht auf eine erste Ausführungsform des erfindungsgemäßen Dachziegels,

Fig. 2

die Druntersicht des Ziegels von Fig. 1,

Fig. 3

einen Längsschnitt durch den Ziegel von Fig. 1 gemäß der Schnittlinie III-III von Fig. 1,

Fig. 4

die Stirnansicht des Fußbereichs des Ziegels,

Fig. 5

einen Teilvertikalquerschnitt durch zwei benachbarte, einander überdeckende Ziegel ohne Berücksichtigung der hinter der Bildebene liegenden Ziegelbestandteile,

Fig. 6

eine Teilvertikal-Längsschnitt zweier ineinander gedeckter Ziegel im Bereich der Mittelfeldmulde, wobei Ziegel I im Kopfbereich und Ziegel II durch den Koffer geschnitten ist,

Fig. 7

die Draufsicht zweier ineinander gedeckter Ziegel im Bereich des Fußseitenfalzecks, wobei von Ziegel I das Fußseitenfalzeck und von Ziegel II die Untersicht des Fußdeckfalzecks dargestellt ist,

Fig. 8

einen Teilvertikal-Längsschnitt durch drei ineinander gedeckte Ziegel, wobei Ziegel I im Bereich der rechten Mulde, Ziegel III als Seitenansicht des Fußseitenfalzecks und Ziegel IV im Schnitt des Fußdeckfalzecks dargestellt sind,

Fig. 9

die Eindeckung im Bereich des Vierziegelecks, wobei Ziegel I mit der schematischen Draufsicht des Kopfseitenfalzecks, Ziegel II mit der Draufsicht des Kopfdeckfalzecks (strichpunktiert), Ziegel III mit der Untersicht des Fußseitenfalzecks (durchgezogene Linie) und Ziegel IV mit der Unteransicht des Fußdeckfalzecks (strichpunktiert) zu sehen sind,

Fig. 10

die Draufsicht auf eine zweite Ausführungsform des erfindungsgemäßen Ziegels mit einer Kopffalznut im Bereich des erhöhten Ziegelmittelfeldes,

Fig. 11

einen Teilvertikal-Längsschnitt durch zwei miteinander verlegter Ziegel gemäß Fig. 10, wobei der Schnitt durch das erhöhte Ziegelmittelfeld des überdeckten Ziegels verläuft,

Fig. 12

einen Teilvertikal-Längsschnitt durch zwei übereinander gestapelte Ziegel gemäß Fig. 10,

Fig. 13

eine Draufsicht auf eine weitere Ausführungsform des erfindungsgemäßen Ziegels mit einem ebenen Ziegelmittelfeld.

Fig. 14

die Druntersicht des Ziegels von Figur 13 und

Fig. 15

die Druntersicht einer weiteren Ausführungsform des erfindungsgemäßen Ziegels mit einer geänderten Fußverfalzung.

Exemplary embodiments of the invention are described below. Show it:

Fig. 1

a plan view of a first embodiment of the roof tile according to the invention,

Fig. 2

the bottom view of the brick of Fig. 1,

Fig. 3

2 shows a longitudinal section through the brick of FIG. 1 along the section line III-III of FIG. 1,

Fig. 4

the front view of the foot area of the brick,

Fig. 5

a partial vertical cross section through two adjacent, overlapping bricks without taking into account the brick components lying behind the image plane,

Fig. 6

a partial vertical longitudinal section of two nested tiles in the area of the central field, brick I in the head area and brick II cut through the case,

Fig. 7

the top view of two interlaced bricks in the area of the toe fold, wherein the tile fold is shown from tile I and the bottom view of the tile fold from tile II,

Fig. 8

a partial vertical longitudinal section through three nested bricks, brick I in the area of the right trough, brick III as a side view of the toe fold and brick IV in the section of the toe fold,

Fig. 9

the covering in the area of the four-tile corner, whereby brick I with the schematic top view of the top hinge corner, brick II with the top view of the top corner hinge (dash-dotted line), brick III with the bottom view of the foot-side hinge corner (solid line) and brick IV with the bottom view of the foot hinge corner (dash-dotted line) you can see,

Fig. 10

the top view of a second embodiment of the brick according to the invention with a top rabbet groove in the area of the raised central tile field,

Fig. 11

10 shows a partial vertical longitudinal section through two bricks laid with one another according to FIG. 10, the section running through the raised central brick field of the covered brick,

Fig. 12

10 shows a partial vertical longitudinal section through two bricks stacked one above the other according to FIG. 10,

Fig. 13

a plan view of a further embodiment of the brick according to the invention with a flat central tile field.

Fig. 14

the bottom view of the brick of Figure 13 and

Fig. 15

the bottom view of a further embodiment of the tile according to the invention with a modified foot fold.

The tile 1 has a top fold part 2, top fold part 3, foot fold part 4, side fold part 5 middle field 6, head side fold corner 28, head cover fold corner 29, foot cover fold corner 49 and a foot side fold corner 48.

On the upper side of the brick, the top interlocking consists of a top edge rib 211, which extends from a center side interlocking rib 515 to be explained, preferably at the same height, through the entire width of the brick up to the top rebate part 3. There is an upper and lower corner cut-out 2951, 2952, around which the top edge rib continues as a W-rib 2953 at approximately the same height. The W-legs are preferably at right angles to one another, the outermost W-leg ending at right angles on the outer cover fold flank 311.

In the area of an inner side groove 516 there is a pin 2133, which is preferably of the same height as the top edge rib 211. Together with a portion of the top edge rib, it is T-shaped in plan view and extends in the extension of said inner side groove 516 in the direction of the Groove.

Between the side fold side end of the top edge rib 211 and the brick outer edge there is still a plateau 2114, which is preferably at the level of an outer side fold rib 513.

• Seitenrandstreifen 511,
• äußere Seitenfalzrippe 513,
• äußere Seitenfalznut 514,
• mittlere Seitenfalzrippe 515,
• mittlere Seitenfalznut 516,
• innere Seitenfalzrippe 517.

The side fold part 5 has the following parts:

• Side margin strips 511,
• outer side rebate rib 513,
• outer side groove 514,
• middle side rebate rib 515,
• middle side groove 516,
• inner side rebate rib 517.

The parts just mentioned each extend at a constant height from the head area to close to the foot area of the brick. Two corner cut-outs are provided in the foot side corner 48, namely an upper 4851 and a lower 4852. The upper one is smaller than the lower one.

To the side of the upper corner cut-out 4851 and above the lower corner cut-out 4852 is a plateau 5137, which is in front of a bump 532 and is lower than the top of the bump. The hump has a wedge-shaped shape in plan view that extends widening from the outside of the brick to the inner side rebate rib 517 and rests against the flank thereof facing outwards. Its outer tip is rectangular in plan view and forms the head-side end of the upper Eckausschnitts 4851. Its head side wall extending at 45 ^° to the brick outside and defining a water diverter 531, which represents a collection channel for the two Seitenfalznuten 514 and 516th The water switch also runs under 45 ^o to the outer edge of the brick. The inner 513 and outer side fold rib 515 are cut obliquely at their foot end at the same angle.

The hump 532 has a sloping connecting wall to the plateau 5137 on the foot side, which extends from the inner corner of the upper corner cut 4851 runs slightly obliquely to the flank of the inner side rebate rib 517.

The inner side rebate rib 517 has a shoulder 5171 on its outer flank to the side rebate groove, which extends to the bottom of the groove and protrudes outwards in cross section and is covered by a counter shoulder when covered (see FIG. 5), which is located on the outer brick edge of the top seam part 3 .

The side fold part has the side edge strip 511 already mentioned, which has an outwardly projecting shoulder 512 which, when covered (see FIG. 5), is covered by a counter shoulder 3271 which is located on the inner cover fold flank 3132.

The interlocking tile 1 is longitudinally displaceable and therefore has a top profile that is constant over its length. The brick center panel 6 contains a left recess 614, which is arranged between the side fold part 5 and an elevated center panel 612. It is laterally delimited by an outer flank 518 of the inner side rebate rib 517 and by the left flank 613 of the raised midfield part.

A right midfield trough 616 is delimited by the right flank 615 of the raised midfield part and the inner top fold flank 313 of the top fold part.

The inclination of the flanks 518, 613, 615 and 313, measured in a normal of the base area of the troughs, is the same in each case, even in the foot area. There, the troughs 614 and 616 are in a gently curved curve in FIG Form of tongues 619 pulled far down to a plaster ridge 961.

FIG. 4 shows that the cleaning ridge 962 runs in the area of the side fold part 5, the raised middle field 612 and the cover fold part 3 at the same height and level. The cleaning ridge 961 in the region of the depressions 614 and 616, on the other hand, is lower than the cleaning ridge 962. It is located on the bottom, bottom brick edge. The plaster burr follows the cross-sectional shape of the brick, resulting in a meandering course. The plaster burr 961 is consequently - in accordance with the trough shape - lowered in a U-shape, the U-legs having the same inclination as the flanks of the troughs just mentioned.

1, 4 and 10 can also be seen that the troughs taper and narrow towards the brick base. This is a consequence of the constant inclination of the flanks in the area of the brick base and the tongues 619, which results in the narrowing in connection with the curved lowering of the tongues.

Now to the back of the brick.

The top rabbet part has a hanging nose 221 on the underside of the troughs, which are integrally connected to one another via a stacking rib 225. The stacking rib is preferably somewhat lower than the hanging lugs. The stacking rib and the hanging tabs can also form a one-piece rib.

• äußere Deckfalzflanke 3171,
• äußere Deckfalzrippe 323,
• äußere Deckfalznut 324,
• mittlere Deckfalzrippe 325,
• mittlere Deckfalznut 326,
• Gegenabsatz 3271 an der inneren, unterseitigen
• Deckfalzflanke 3132.

The cover fold part 3 comprises the following elements:

• outer cover seam flank 3171,
• outer top seam rib 323,
• outer top groove 324,
• middle top fold rib 325,
• middle cover groove 326,
• Counterparagraph 3271 on the inner underside
• Top fold flank 3132.

The two top seam ribs 323 and 325 extend from the head-side corner cutouts 2951 and 2952 to close to the foot area of the brick. There they obliquely in an angle of 45 ^o to the extending brick outside connecting rib 3293, which respectively extends from the brick outside to the inner interlocking cover flank 3132 to the edge of a plateau 4954th The middle foot rib 425 continues at a height along the adjacent case 9 to the head end of the case in the form of the plateau 4954. The plateau ends at the top with a middle panel wall 911 of the case. The end of the plateau on the top seam side is formed by a flank which extends approximately in the extension of the inner top seam flank 3132 and ends at a block 4953, which will be explained later. The connecting rib 3293 has the same height as the top seam ribs 323 and 325. In front of it on the foot side is a hollow 3292 which, when covered, comes to lie above the hump 532 of the top of the brick (see FIGS. 7 and 8).

A step 3291 follows on the foot side, which is located in front of a central foot rib 425 and which is arranged above the plateau 5137 when covered. Together with the toe fold to be explained, the step forms a stair seal, which can be seen particularly well in FIG. 8.

The connecting wall of the step facing the cavity 3292 runs obliquely from the outside of the brick to a block 4953, which is in front of the central foot rib 425 and is located in the corner between the said foot rib 425 and the flank of the plateau 4954.

As FIG. 7 shows, when the tiles are covered, the block 4953 is inserted into the upper corner cut-out 4851 of the foot-side seam corner 48. In the present case, the block is just as high as the central foot rib 425 and the plateau 4954.

2 comprises an outer foot rib 423, a middle foot rib 425 and an inner foot rib 427. The former two together with the block 4953 are of the same height and thus form a flat contact surface, which only extends from the outer foot groove 424 is interrupted. The outer foot rib 423 is located directly on the edge of the brick, while the middle foot rib is arranged at a short distance behind it.

Both ribs each end on suitcases 9, which are located below the two troughs 614 and 616. On the underside of the side fold part 5 in the area of the foot side fold 48, the outer foot rib 423 is formed along the case in the form of a plateau 4854 and encloses the two corner cut-outs 4852 and 4851 in the form of a W-rib 4853. The freely ending W-leg runs in the direction of the outer edge of the brick in the side seam part of the top seam part and protrudes just as far in the direction of the brick head as the case 9 just mentioned, or respectively plateaus 4854 and 4954 arranged laterally from the case Plateaus each end on the midfield walls 911 of the suitcase, the free-ending W leg of the W rib 4853 consequently ends in the plane of these midfield walls.

The two plateaus 4854 and 4954 form sliding shoes that extend over the entire length of the case, which not only guarantee the movability of the brick, but also increase the tightness in the area of the case.

The middle foot groove 426 is located between the middle foot rib 425 and the inner foot rib 427. The inner foot rib 427 can be as high as the rest of the foot ribs.

The flank of the inner foot rib 427 directed towards the middle field runs essentially in one plane with the middle field walls 911 of the two cases. Spacer lugs 917 are arranged in the center of these walls and, as shown in FIG. 6, have the same inclination as the top edge rib 211. If the bricks are pulled to the stop, the foot region of the covering brick does not rise from the head region of the covered brick.

The suitcases 9 extend at a constant height from the foot-side brick edge to the central field-side end of the foot rebate part 4. They have a rectangular shape, the longer sides of the rectangle being directed in the longitudinal direction of the brick. Starting from the center panel walls 911, a left side wall 912 and a right side wall 913 each extend to the bottom edge of the brick. These side walls are flat and, analogously to the inclination of the troughs 614 and 616 on the top side, so inclined that the suitcases lie flat against the troughs when covered.

The surface of the case is also flat in order to achieve a level support on the base of the trough in this area as well. Each case has a cavity 915, which can be divided by a crosspiece 916. To improve the material flow during pressing and to minimize the body thickness of the surface of the trough, the trough tongues 619 are drawn in a flat curvature over the case 9 to the cleaning ridge. Due to this curvature and the setting of the minimum body thickness, the foot-side cavity 915 is less deep than the center-field side, as shown in FIGS. 3 and 6.

The troughs 614 and 616 are reinforced on the underside by longitudinal ribs 621, which have the same height as an edge rib arranged at the edge of the side fold. They all have an equally large and equally inclined lowering 627 towards the brick base.

FIG. 5 shows schematically the engagement of the top seam part 3 of a left-hand brick according to the invention in the side seam part 5 of a right-sided brick according to the invention. The purpose of the representation is to show the mutual interference of density between paragraph 5171 and counterparagraph 3171 or paragraph 512 and counterparagraph 3271.

The shoulder 5171 is located on the outer flank of the inner side rebate rib 517 and is covered when the brick is covered by the counter-heel 3171, which is located on the outer flank of the top rebate part 3 of the adjacent brick according to the invention.

The pairing between paragraph and counter-paragraph narrows the gap which is formed by the vertical side parting line 54 and which is open at the top.

FIG. 5 also shows the narrowing of the gap in the vertical deck joint 55, which is open at the bottom. There, the shoulder 512 on the side fold flank 511 is overlaid by the counter shoulder 3271, which is arranged on the outer cover fold flank 3132.

FIG. 7 shows the overlap in the foot area of the side rebate part 5 of a right-sided brick according to the invention by the top rebate part 3 of a left-sided neighboring brick according to the invention. The viewer looks through the bricks as it were at the engagement of the different parts of the interlocking.

One recognizes the vertical side parting line 54. The already mentioned stair seal results from the mutual engagement of the plateau 5137 and the step 3291. One recognizes the advantageous function of the front wall of the hoop 532 running diagonally upwards to the right. As a result, the vertical side parting line 54 may blow in Rain or snow from the four-tile corner is pressed upwards, whereupon the ingresses either reach the brick surface of the adjacent brick on the right or the side folds 5 of the brick on the right-hand side. In the latter case, the rain and snow that is blown in is collected via the side rebate grooves 514 and 516 and discharged with the aid of the water switch 531. It is important that the inclined front wall 5321 of the hanger extends obliquely to the top right, because only in this way can any penetrations that have penetrated be pushed away from the critical four-tile corner.

If indentations pass over the hump 532, the connecting rib 3293 also serves to force the indentations downward into the water switch 531, whereupon they are connected With the help of the same can be carried out laterally on the upper side of the tile of the covered tile. FIG. 7 likewise shows the W-shaped toothing engagement of the foot-side seam corner 48 of the right-sided brick in the W-shape of the middle foot-seam rib 425, the block 4953 and the plateau 4954.

FIG. 8 once again explains the staircase seal just mentioned in the area of the foot rebate of brick III or the foot rebate of brick IV.

FIG. 9 shows an overall view of the interlocking parts of the bricks I, II, III and IV present in the four-tile target corner. In order not to confuse the viewer too much, the outlines of the bricks and their remaining components were not included.

However, it should be noted that the top edge rib 211 in connection with the pin 2133 the brick I, the top edge rib 211 in connection with the W rib 2953 the brick II, the W rib 4853 and the plateau 4854 the brick III and the plateau 4854 , the block 4953 and the middle foot rib 425 are assigned to brick IV. The illustration shows the extremely intimate interlocking of the different types of W-ribs, the sealing achieved in this way is optimal.

The embodiment of the brick according to the invention according to Figures 1 and 2 can be laid both in rows and in a composite. Figure 10 shows a variant of this brick, which can however only be laid in rows because it is in the head section of the raised Center field 612 has a top rebate groove 2111, in which the inner foot rebate rib 427 can engage with a corresponding design. If the intervention is desired, the inner foot rib 427 is to be increased compared to the other two foot ribs 423 and 425, so that it extends down to the bottom of the groove 2111 when covered.

The top rabbet groove 2111 can be preceded by a stop rib 2113 which limits the longitudinal displaceability of the brick and forms a further safeguard against blowing in.

The brick of Figure 10 otherwise corresponds to the brick of Figure 1 ff., So that it is sufficient to refer to the above description.

FIG. 11 shows the engagement of the raised inner foot rib 427 in said top groove 2111 during covering.

FIG. 12 shows the effect of this groove when the bricks of FIG. 10 according to the invention are stacked on top of one another. In this case, the stacking rib 225 of the hanging lugs 221 can be designed in such a way that it engages in the top rabbet groove 2111 for the stacking process and thus brings about a locking within the stack.

FIG. 13 shows a further embodiment of the invention, in which the central tile field 6 is flat and has no depressions 613 and 616. The brick again essentially corresponds to the embodiment of FIGS. 1 ff., So that in principle reference is made to the above description and only a few further details are discussed.

The brick in turn has a profile that is essentially constant over its length. The head rebate not only contains the top edge rib 211, which has already been repeatedly addressed, but also a stop rib 2113, which is now placed at the level of the flat central panel 6 and extends almost over the width of the same from the side rebate part 5 to the top rebate part 3.

FIG. 14 shows the associated foot rebate part 4. Here too, as with the other modified embodiments, it applies that only the changed details are dealt with and the same reference numerals relate to the same parts.

The foot area is dominated by a single case 9, which extends from the top fold part 5 to the side fold part 3. The outer foot rib 423 is divided into two branches 4231 and 4232 by the case 9. The cover fold-side part extends from the outer cover fold flank 311 to the sloping side wall 912 of the case 9. In parallel behind it lies the inner head fold rib 425, in analogous combination with the block 4953 and the plateau 4954. The case contains an elongated, transverse rectangular cavity 915, in which the top fold rib 2113 engages when covered. The length of this cavity determines the longitudinal clearance of the brick.

In the area of the side fold part 5 there is a remnant of the outer foot fold rib 4232 in the form of the plateau 4854 and the W rib 4853.

The plateaus 4854 and 4954 flank the case 9 analogously to the embodiment of FIG. 1 and form a lateral sliding shoe which ends on the head side with the center panel wall 911 of the case.

FIG. 15 shows the bottom view of a further variant of the brick according to the invention.

• Äußere Fußfalzrippe 423,
• innere Fußfalzrippe 424,
• mittlere Fußfalzrippe 425,
• mittlere Fußfalznut 426,
• innere Fußfalzrippe 427.

The rebate includes the following elements:

• Outer foot rib 423,
• inner foot rib 424,
• middle foot rib 425,
• middle foot groove 426,
• inner foot rib 427.

The outer foot rib 423 connects all three foot ribs to one another in the region of the top seam part 3 with the aid of a W rib 4953. The W-rib includes a part of the middle foot rib 423, a block 4953 and a plateau 4954. All these parts and all foot ribs are of the same height.

The same applies to the cover fold part. There the outer foot rib 423 is connected to the other foot ribs and the W rib 4853 via the plateau 4854.

The middle and inner foot rib 425, 427 are notched on the underside of the brick center panel 612 or run over it at a reduced height.

Claims (27)

1. Longitudinally displaceable interlocking roofing tile (1) having an upper-side profiling which is essentially uniform along its length and having a head border rib (211) extending across the entire width of the roofing tile and a side, top and foot interlocking part (5, 3, 4), the latter having an outer foot interlocking rib (423) and on the rear side, in the region of troughs (614, 616), possessing U-shaped ribs with oblique side walls on the two U-limbs, which ribs, together with the foot interlocking rib (423), form a box (9), and the foot-side plaster verge (962) running in a planar manner at essentially one height in the region of the side and top interlocking parts and of the raised central zone (612), a vertical side expansion joint being formed when the roofing tile is laid, characterized in that the box (9) is planar on the underside and is adjoined by the outer foot interlocking rib (423) and, at the end face (914) of the box (9), the plaster verge (961) is drawn downwards in a U-shape towards the roofing tile border, following the cross-section of the box (9), the surface of each trough (614, 616) reaching with a tongue (619), having a shallow curvature, as far as the plaster verge (961), in order to improve the material flow during pressing and to minimize the thickness of the body.
2. Interlocking roofing tile according to Claim 1, characterized in that the oblique side walls (912, 913) of the box (9) are taken in a planar manner as far as the end face (914) and have a uniform inclination which is such that they bear flat against the U-shaped surface form of the troughs (614, 616) of the covered roofing tile in a sealing manner when they are laid.
3. Interlocking roofing tile according to Claim 2, characterized in that the foot interlocking part (4) comprises, parallel to the outer foot interlocking r-b (423), a central foot interlocking rib (425) of the same height, which extends from the top rebate-side roofing tile border as far as the first box (9) and between the two boxes (9).
4. Interlocking roofing tile according to at least one of Claims 1 to 3, characterized in that an inner foot interlocking rib (427) runs between the two boxes (9).
5. Interlocking roofing tile according to Claim 4, characterized in that the flank of the inner foot interlocking rib (427) directed towards the central zone (6) lies in the same plane as central zone walls (911) of the boxes (9).
6. Interlocking roofing tile according to at least one of Claims 1 to 5, characterized in that each box (9) has a cavity (915) while leaving a minimum thickness (S) of the body to the surface of the trough tongue (961).
7. Interlocking roofing tile according to Claim 6, characterized in that the cavity (915) of the box (9) has a web (916) parallel to the foot interlocking ribs (423, 425), which web ends, in particular, flush with the underside of the box.
8. Interlocking roofing tile according to at least one of Claims 1 to 7, characterized in that the plaster verge (961) of the two troughs (614) in the foot region lies below the plaster verge (962) of the side interlocking part (5), central zone (6) and top interlocking part (3).
9. Interlocking roofing tile according to at least one of Claims 1 to 8, characterized in that the inclination of the flanks (518, 613, 615, 313) of the troughs (614, 616) - measured in a normal of the base area of the troughs - is the same even in the region of the curved tongue (619) as in the centre of the roofing tile.
10. Interlocking roofing tile according to at least one of Claims 1 to 9, characterized in that the tongue (619) tapers and narrows in the direction of the foot of the roofing tile.
11. Interlocking roofing tile according to one of Claims 1 to 10, having a hump (532) arranged in the foot region of the side interlocking part, in front of which hump a water shunt (531) is arranged as a collector for side interlocking grooves, characterized in that the top interlocking part (3) has an outer and an inner top interlocking rib (323, 325), which are connected at the foot side by-a connecting rib (3293) which, analogously to the path taken by the water shunt , extends obliquely as far as an inner flank (3132), which forms the underside connection of the top interlocking part (3) to the trough (616).
12. Interlocking roofing tile according to one of Claims 1 to 11, having a side interlocking part (5), which has an outer and an inner side interlocking groove (514, 516), and a peg (2133), directed towards the side interlocking part, of the head border rib (211), characterized in that the peg (2133) runs in line with the inner side interlocking groove (516).
13. Interlocking roofing tile according to Claim 12, characterized in that the roofing tile (1) has, in the head/top interlocking corner (26), an upper and lower corner cutout (2951, 2952) and a W-rib (2953) is led around the corner cutouts as far as the roofing tile border, as an extension of the head border rib (211), the peg (2133) coming to lie in the lower corner cutout (2952) during laying.
14. Interlocking roofing tile according to one of Claims 1 to 13, having at least one corner cutout in the foot/side interlocking corner, characterized in that two corner cutouts (4851, 4852) are present in the foot/side interlocking corner (4) and the outer foot interlocking rib (423) has a W-rib (4853) which is led around the two corner cutouts, and in that the outer W-limb of the W-rib (4853) runs parallel to the outside of the side rebate-side roofing tile border and ends freely there.
15. Interlocking roofing tile according to one of Claims 1 to 14, characterized in that the outer foot interlocking rib (423) is designed in the region of the foot/side interlocking corner (48) along the box (9) in the form of a plateau (4854), which extends primarily over the entire length of the box and is preferably the same height as the outer foot interlocking rib (423).
16. Interlocking roofing tile according to one of Claims 1 to 15, characterized in that the central foot interlocking rib (425) is designed, in the region of the foot/top interlocking corner (49), as a plateau (4954), which extends as far as the head-side end of the adjacent box and preferably is the same height as the outer foot interlocking rib (423).
17. Interlocking roofing tile according to Claims 11 and 16, characterized in that the connecting rib (3293) ends on the outer flank of the plateau (4954), which flank simultaneously forms the boundary for the hollow (3292).
18. Interlocking roofing tile according to Claims 14 and 16, characterized in that a block (4953), which provides the connection to the outer flank of the plateau (4954) and which, furthermore, is inserted into the upper corner cutout (4851) of the foot/side interlocking corner when the roofing tiles are laid, is arranged in front of the central foot interlocking rib (425) in the foot/top interlocking corner (49).
19. Interlocking roofing tile according to Claim 14, having a hump (532) in the foot/side interlocking corner (48), characterized in that a plateau (5137), in that [sic] adjoins both the upper (4851) and the lower corner cutouts (4852) and is situated deeper than the hump (532), is arranged in front of the hump (532).
20. Interlocking roofing tile according to Claim 19, characterized in that a step (3291), which is situated above the plateau (5137) of the covered roofing tile during laying and forms a step seal together with the foot interlocking rebate, is arranged in front of the central foot interlocking rib (425) in the foot/top interlocking corner (49).
21. Interlocking roofing tile according to Claim 20, characterized in that a hollow (3292), into which the hump (532) is inserted during laying, is provided between the step (3291) and the side interlocking rebate (3).
22. Interlocking roofing tile according to Claims 18 and 20, characterized in that the vertical wall of the step (3291) is directed towards the block (4953) and ends there.
23. Interlocking roofing tile according to at least one of Claims 1 to 22, characterized in that the inner foot interlocking rib (427) is higher than the central and outer foot interlocking ribs (425, 423) and, when laying in rows, engages in a head interlocking groove (2111) present on the elevated roofing tile central zone (612) in the head region during laying.
24. Interlocking roofing tile according to Claim 23, characterized in that a stop rib (2113) is arranged in front of the head interlocking groove (2111) on the elevated central zone (612).
25. Interlocking roofing tile according to one of Claims 1 to 24, having two suspension lugs (221) on the rear side of the tile, characterized in that a stacking rib (225) is arranged in the region between suspension lugs (221).
26. Interlocking roofing tile according to at least one of Claims 1 to 25, characterized in that the inner side interlocking rib (517) is provided on its outer flank with a shoulder (5171), which extends as far as the base of the groove, projects outwards in cross-section and is covered by a mating shoulder (3171) during laying, which mating shoulder is situated on the outer roofing tile border of the top interlocking part (3).
27. Interlocking roofing tile according to at least one of Claims 1 to 26, characterized in that the side rebate-side roofing tile border has an outwardly protruding shoulder (512) at the bottom, which is covered by a mating shoulder (3271) during laying, which mating shoulder is situated on the top interlocking flank (3132).

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