EP0718449A1 - Roof tile - Google Patents

Abstract

The tile has a single head groove (214) between the head block (215) and the head edge strip (211) in which the outer (442) and the inner (441) ribs engage. An elongation (281) is added in the region of the head groove in alignment with the side rib (513) and a sunken elongation (292) is in alignment with the tile edge section (3). Both elongations extend with the same cross-section to the outer head edge strip (211), which has a hook-shaped bent section (291).

Description

The invention relates to a interlocking tile for bandage and row covering, mainly trough-fold tile, with a head and side fold and a vertical side and head parting line, each with a simple corner cutout in the head cover and foot side fold corner and a sliding area in the longitudinal direction of the brick in the form of a head clearance is limited compared to the central tile field by a transversely directed, uncovered head block lying outside the interlocking head.

So-called hollow rebate tiles have been known since the end of the last century. This z. B. from DE-PS 16 757 roof tiles has proven itself. It can be laid both in an association and in rows. Laying in the bond has the advantage that the side fold drains onto the middle field of the underlying tile.

The well-known hollow rebate tile has a vertical side parting line and a vertical head parting line. In the head area of this type of tile there is a head block located in front of the head rebate outside of the rebate, which contributes significantly to the rainproofness of this type of roof tile. It blocks a large part of the rainwater, which would be blown in if the wind came from the eaves.

The vertical side parting has the disadvantage that rainwater can be introduced much easier by the wind than with a horizontal side parting, on the other hand the advantage that the side fold is very slim. As a result, less tiles / m² can be covered with this brick with the same mass and weight. The roof is becoming more economical.

The object of the invention is to provide a interlocking tile of the type mentioned with a significantly increased headroom without increasing the head coverage.

The increased headroom has several reasons:
There is more and more covering work, and the trough rebate tile is recommended as an inexpensive roof tile model, since there is no need to re-bed with increased headroom when changing work. With newly covered roofs, the roof division is made considerably easier by a large headroom.

Assume that the headroom is 30 mm and the roof tile is 360 mm long. Then with a rafter length of 12 x 360 mm = 4320 mm = about 4.3 m, one row can be saved by pushing or pushing the bricks. Averaging is less about saving a row of bricks, but rather that a perfect eaves and ridge finish can be made.

So-called longitudinally displaceable roof tiles have been known since the 1970s, including some that are similar to the hollow rebate tile.

A longitudinally displaceable roof tile model known from DE-PS 26 44 227 has only a single head edge strip, which is why its rainproofness is insufficient.

Another brick known from EP 432 783 does have a second, inner top rabbet rib and can also be laid in a bandage, but it does not have the well-known function of the outside rabbet (DE-PS 16 757), which is well-proven in its function, and therefore not covered head block.

• 1. Steigerung der Regensicherheit, sowohl bei Reihen- als auch insbesondere bei Verbanddeckung, Verbesserung der Regeneintragssicherheit,
• 2. Erhaltung des Kopfblocks,
• 3. Erhöhung des Kopfspielraumes ohne Vergrößerung der Kopfüberdeckung, das heißt, Erhaltung der gleichen Deckfläche bei gleichen Ziegelaußenmaßen.

The subject of the invention is an improvement of the aforementioned folding tile in the following points:

• 1. Increase in rain safety, both with row and especially with bandage coverage, improvement of rain entry security
• 2. preservation of the head block,
• 3. Increasing the headroom without increasing the head coverage, that is, maintaining the same top surface with the same external brick dimensions.

This object is achieved in that between the head block and the head edge strip there is a single head rebate groove, in which the outer and inner foot rebate rib engage together when covering and that an extension is attached in the area of the head rebate groove, in alignment with the inner, not covered side rebate rib and a aligned extension of the cover fold part is arranged in alignment with the cover fold part and go through both extensions with the same cross section up to the outer top edge strip.

As already mentioned, the head block is known for hollow rebated tiles and has proven itself with regard to its positive effects on the security against rain entry. However, the known hollow rebate tiles generally have two top rebate ribs, the head block and accordingly two top rebate grooves, and two foot rebate ribs and, accordingly, a foot rebate groove. If the longitudinal clearance in the rafter direction of the roof is to be increased in the known hollow rebate tile, then both the width of the two top rebate grooves and the width of the foot rebate groove must be increased by the desired amount.

In accordance with the increase in headroom, the corner cutouts would also have to be enlarged in the longitudinal direction of the brick. Due to this necessary enlargement of the corner cut-outs, there is a risk that the four-tile corner, or the three-tile corner, will open when the bandage is covered and driving rain or snow will thus be driven in. This means that the headroom must be expanded so that the corner cut-outs in the top deck fold and in the foot side fold corner need not be enlarged.

A widening of the two top rebate grooves and the foot rebate groove, however, results in a significant increase in head coverage. This means that the tile must either be made longer, ie more expensive, or more pieces are required per m² of roof area. This also makes the roof more expensive.

The depth of the inner and outer top groove is different in the previously known hollow rebate tiles. The outer top rebate groove is less deep, since the inner foot rebate rib, which engages in this groove, can be made less high for reasons of horizontal stackability. The reason for the smaller depth of the outer top rebate groove and thus the inner foot rebate rib is also the task that this tile should be laid in rows as well as in a bandage.

The known outer foot rib consists essentially of two pegs which lie in the troughs of the inner foot groove. When stacking horizontally, the two pegs of the outer foot rib lie in the troughs to the left and right of the midfield. The inner foot rib lies on the top fold plate, midfield and side fold part and can therefore not be made higher. In order to ensure a corresponding intervention, the inner top groove also had to be made less deep.

The shallow depth of the outer top groove made it possible to stack the bricks horizontally in the head area by placing the hanging lugs in the outer head groove.

Since even with the trough rebate tile known up to now, the outer top rebate groove could not be drained to the middle field due to the then necessary drainage heads in the middle top rebate rib, the outer top rebate groove was drained into the side rebate, which led to an overflow of the side rebate in the eaves area during heavy rainfall.

In the roof tile model according to the invention, the inner and outer foot rebate rib are placed as close together as is ceramically acceptable. Now with a favorable design the invention also the inner foot rib in the same way as the outer with two pins which each engage in one and the same trough in the top groove. This measure made the inner head rebate superfluous and the two resulting troughs, which are located in the extension of the midfield troughs, can now be drained together via the already known overflow heads in the head block.

As a result of this measure, the now only top rebate groove could be made very wide, which leads to the desired large headroom.

The top rebate groove should now under no circumstances be drained into the side rebate part, as with the well-known hollow rebate tile, which is why the covered and lowered extension of the inner side rebate rib and the lowered top rebate part in the same cross-section, starting from the head block, up to the top edge strip was carried out to limit the only top rebate groove. This resulted in a highly effective lateral delimitation of the top rebate groove, which forces the rainwater that is produced or blown in to run off through the overflow heads in the head block. Rainwater is thus kept away from the side rebate, even when laid in rows.

In the known hollow rebate tile there is also an extension running through in the same cross-section, both of the inner side rebate rib and of the cover rebate part, but this only runs as far as the inner top rebate rib. The outer top fold rib drains into the side fold, as beerits mentioned. This fact was one of the disadvantages of the well-known hollow rebate tiles.

A large part of the well-known hollow rebate tiles have a very narrow web in the top deck seam in the extension of the inner head rebate rib. There is no rain protection at the corner cut-out itself.

In an advantageous development of the invention it is provided that the head edge strip in the form of a hook-shaped kink is angled around the corner cutout in the top deck corner.

From DE-PS 26 44 227 a head edge rib is known, which is angled around the cutout of the top deck fold.

This solution was possible with the roof tile model mentioned there because there was no double interlocking of the head. This model has only a single head edge strip.

In the case of a roof tile according to EP 432 784, the height of the inner head rebate rib is very low. The height of the inner fold of the foot is reduced by the amount of the height of the inner fold of the head.

The height of the top edge strip, which is guided around the top deck corner corner cutout in the known bricks, is very low, since the top fold part is carried out at the same height up to the top edge strip. In the brick according to the invention, the cover fold part is lowered in an extension after the head block, as a result of which the angled top edge strip can be made substantially higher in the area of the corner cutout.

But if you now want to guide the top edge strip around the corner cutout at the same height, even if you have two equal-height ribs, then the tile can no longer be laid in a bond. In order to enable laying in the dressing, it is proposed in a further development of the invention to provide the inner foot rib with a notch into which the angled head edge strip can insert in the area of the top corner fold cutout when the dressing is covered.

This notch initially represents a weakening in terms of the security against rain entry. This weakening in the intervention, particularly in the case of row coverage, was compensated for by a lowering in the area of the extension of the middle field. This lowering represents a swirl chamber in the manner of the Venturi nozzle. By attaching this swirl chamber, there was also a second effect, which was achieved with the aid of a locking lug slippage of the tiles from each other is prevented when stacked on the roof. This effect will be discussed later.

In another development of the invention, it is provided that between the head block and the outer top edge strip, that is to say in the existing single top groove, an increase in extension of the elevated central field is provided, it being possible advantageously to provide that the increase does not extend to the outer top edge strip is carried out, but has a recess before the junction in the outer head edge strip.

The middle field was drawn in the form of an increase across the entire width of the top rebate groove, except for the decrease already mentioned. With this, both the inner and the outer top rebate rib could be provided with pins. Through these measures, the required condition was met that the tiles can be laid in rows as well as in the association.

However, the measures described above resulted in an additional difficulty that was not initially expected. The stack height in the known trough rebate tile is defined in the head area by the height of the hanging lugs, which, as already mentioned, lie in the outer top rebate groove. In the foot area, the stacking height results from the height of the footrest of the roof tiles among one another, which is ensured in the known trough rebate tile by the continuous inner foot rebate rib.

In order to ensure the greatest possible rain safety, the top rabbet groove and the pins engaging in it should be designed as deep as possible.

This gave the possibility of stacking the bricks in the foot area through the cones that lay in the hollows of the middle field. To do this, however, it was necessary to increase the height of the support ribs known per se, which are located on the rear side of the hollow rebate tile. this in turn made it necessary to lower the raised support ribs in the area of the roof batten in order to ensure that the hanging lugs engage as deeply as possible in the roof batten.

First of all, attempts were made to loosen the bricks in the head region in a known manner with the aid of the hanging lugs which lay in the two depressions of the top rabbet groove.

In view of the drying and firing pads available in the roof tile factories, the hanging tabs cannot be made as high as would be necessary with the required depth of the top rebate groove. At first, the bricks could not be stacked in the head area. Help came from stacking humps, which are preferably arranged in the extension of the support ribs in the head region of the rear of the brick, which lie on the top edge strips when stacked horizontally.

In order to avoid excessively large material accumulations, which can lead to tension and thus to tears, especially in the head area, recesses were arranged between the stacking knobs.

• 1. Die Aufhängenasen wären soweit in Richtung Mittelfeld zu verrutschen gewesen, daß beim Betreten des Daches ein Kippmoment auftritt, da dann die Dachlatte praktisch unter dem Kopfblock liegt und insbesondere bei gezogenen Ziegeln die Zapfen der Fußfalzrippen den darunterliegenden Ziegel zum Kippen bringen,
• 2. mit Rücksicht auf die bei den Dachziegelwerken vorhandenen Trocken- und Brennunterlagen konnten die Aufhängenasen nicht soweit in Richtung Ziegelmittelfeld gerückt werden.

An additional difficulty was that due to the widening of the single top rabbet groove, the tiles slipped apart when stacked on the roof. It was not possible to move the hanging lugs so far towards the center of the brick that they could have locked on the head block:

• 1. The hanging lugs would have slipped so far in the direction of the middle field that a tipping moment occurs when entering the roof, since then the roof batten is practically under the head block and, in particular with drawn bricks, the pins of the rebate ribs cause the underlying brick to tip,
• 2. With regard to the drying and firing pads available at the roof tile factories, the hanging lugs could not be moved as far towards the central tile field.

If you leave the hanging lugs in the known, correct position, the tiles slide off each other when they are stored in packages on the roof, which is common today.

Roof tiles are first placed on the roof battens in packages of 4 to 8 pieces before covering, then they are covered. In order to enable the stacking of roof tiles on the roof, which is usually carried out by auxiliaries, it is necessary for the individual roof tiles to be prevented from slipping on the slope of the roof structure. This is usually done by hanging the lugs in the top rabbet groove of the underlying tile when stacking the roof tiles horizontally one above the other.

In order to make it impossible for the tiles to slide off on the roof, in a favorable further development of the invention, the elevation in the top rabbet groove was provided with a recess in the middle of the head in the extension of the middle field. When the bricks are stored horizontally, a third locking lug engages in this recess, which is located between the two hanging lugs. The two suspension lugs and the locking lug can also be combined into a single bar in a variant of the invention. However, this measure is not recommended in all cases. Such a bar tends to tear or bend when pressed and dried.

• 1. die beiden Fußfalzrippen sind so eng aneinander gelegt, wie dies keramisch noch zu vertreten ist, um einerseits die Kopffalznut und damit die Kopfüberdeckung so klein wie möglich zu halten, andererseits die Kopffalznut so reichlich bemessen zu können, daß der gewünschte große Kopfspielraum zur Verfügung steht. Aus Gründen der Regeneintragssicherheit sind auf zwei Fußfalzrippen vorhanden,
• 2. die beiden bei der Gattung vorhandenen Kopffalznuten sind zu einer einzigen, möglichst tiefen Kopffalznut zusammengefaßt, die bei gleicher Kopfüberdeckung die für den gewünschten und erhöhten Kopfspielraum notwendige Breite hat,
• 3. sowohl innere als auch äußere Fußfalzrippe können mit Zapfen versehen sein, die in die Mulden der Kopffalznut eingreifen,
• 4. der Kopfrandsteifen kann um den Eckausschnitt im Deckfalzeck abgewinkelt hakenförmig herumgeführt werden,
• 5. die innere Fußfalzrippe kann im Bereich des Mittelfeldes mit einer Ausklinkung versehen sein, so daß die hakenförmige Abwinkelung des Kopfrandstreifens, auch beim Verlegen im Verband nicht hinderlich ist.
• 6. die nunmehr einzig vorhandene Kopffalznut kann links und rechts durch Verlängerungen der inneren Seitenfalzrippe und des Deckfalzteiles, der abgesenkt im gleichen Querschnitt bis zum Kopfrandstreifen durchgeführt sind, seitlich begrenzt sein, wodurch Regenwasser gezwungen ist, durch die Überlaufköpfe im Kopfblock abzufließen,
• 7. die horizontale Stapelhöhe kann durch Erhöhung der Stützrippen auf der Rückseite des Ziegels vergrößert sein,
• 8. um trotz der Erhöhung der Stützrippen einen einwandfreien Eingriff in die Dachlatten zu gewährleisten, können die Stützrippen im Bereich der Dachlatten mit Absenkungen versehen sein,
• 9. in Verlängerung der Stützrippen können am Kopfende an der Ziegelrückseite Stapelhöker angebracht sein, die sich beim horizontalen Stapeln auf den Kopfrandstreifen des darunterliegenden Ziegels auflegen.
• 10. da nur noch ein Kopfrandstreifen vorhanden ist, kann dieser so dick ausgebildet werden, daß eine Verletzung des Kopfrandstreifens durch das horizontale Stapeln nicht möglich ist,
• 11. die Aufhängenasen sind an der ursprünglichen Position belassen und dazwischen kann eine weitere Verrieglungsnase angeordnet sein, die in eine hierfür vorgesehene Ausnehmung eingreift, die sich am Kopfende der Erhöhung in Verlängerung des Mittelfeldteiles in der Kopfnut befindet,
• 12. die oben erwähnte Verlängerung, beziehungsweise Erhöhung des Mittelfeldteiles in der Kopffalznut sind im Bereich des Kopfrandstreifens ausgenommen, nicht nur um dort eine Verriegelung mit Hilfe der bereits erwähnten Verriegelungsnase zu gewährleisten, sondern auch um hier eine Wirbelkammer zu schaffen, die geeignet ist, die Ausnehmung im Bereich der inneren Kopffalznut bei Verlegung in Reihen bezüglich der Regeneintragssicherheit zu kompensieren,
• 13. da es bei der Erhöhung in Verlängerung des Mittelfeldes in der Kopffalznut zu keramisch untragbaren Materialanhäufungen kommt, kann die Ziegelrückseite im Bereich der Erhöhung ausgenommen sein.

The advantages of the invention are as follows:

• 1. The two foot rebate ribs are placed as close to one another as is ceramically acceptable, on the one hand to keep the top rebate groove and thus the head coverage as small as possible, and on the other hand to be able to dimension the top rebate groove sufficiently that the desired large headroom is available stands. For reasons of rain protection, there are two ribs on the toes,
• 2. the two top rabbet grooves present in the genus are combined into a single, as deep as possible top rabbet groove, which has the width necessary for the desired and increased head clearance with the same head coverage,
• 3. Both the inner and outer foot rebate rib can be provided with pins which engage in the depressions of the top rebate groove,
• 4. The top edge stiffener can be angled around the corner cutout in the top fold corner in a hook shape,
• 5. the inner foot rib can be provided in the area of the central field with a notch, so that the hook-shaped angling of the top edge strip is not a hindrance even when laying in a bandage.
• 6. the now only top rebate groove can be limited on the left and right by extensions of the inner side rebate rib and the top rebate part, which are lowered in the same cross-section to the top edge strip, whereby rainwater is forced to flow through the overflow heads in the head block,
• 7. The horizontal stack height can be increased by increasing the support ribs on the back of the brick.
• 8. in order to ensure a perfect engagement in the roof battens despite the increase in the support ribs, the support ribs can be provided with depressions in the area of the roof battens,
• 9. In extension of the support ribs, stacking bumps can be attached to the head end on the back of the brick, which lie on the top edge strips of the underlying brick during horizontal stacking.
• 10. since there is only one head edge strip left, it can be made so thick that it is not possible to damage the head edge strip by horizontal stacking,
• 11. The hanging lugs are left in their original position and between them can be arranged a further locking lug, which engages in a recess provided for this purpose, which is located in the head groove at the head end of the elevation in the middle groove,
• 12. The above-mentioned extension or elevation of the central field part in the top rebate groove are excluded in the area of the top edge strip, not only to ensure locking there with the aid of the locking nose already mentioned, but also to create a swirl chamber that is suitable for the purpose To compensate for recesses in the area of the inner top groove when laying in rows with regard to the protection against rain entry,
• 13. Since there is a buildup of material that is intolerable to ceramics when extending in the middle of the top groove, the back of the tile in the area of the elevation can be excluded.

An exemplary embodiment of the invention is described below with reference to a drawing.

Figur 1

eine Draufsicht auf den erfindungsgemäßen Dachziegel,

Figur 2

eine Druntersicht auf den Falzziegel von Figur 1,

Figur 3

einen Vertikalschnitt von zwei erfindungsgemäßen Falzziegeln, die horizontal übereinander gestapelt sind,

Figur 4

einen Vertikalschnitt gemäß der Linie IV-IV in Figur 1 durch zwei miteinander eingedeckte erfindungsgemäße Ziegeln,

Figur 5

einen Vertikalschnitt gemäß der Linie V-V von Figur 1 durch zwei miteinander eingedeckte Ziegel, und

Figur 6

einen Teilvertikalschnitt und eine Seitenansicht gemäß der Linie VI-VI von Figur 1 durch zwei miteinanander eingedeckte Ziegel.

It shows:

Figure 1

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

Figure 2

a bottom view of the interlocking tile of Figure 1,

Figure 3

2 shows a vertical section of two interlocking tiles according to the invention which are stacked horizontally one above the other,

Figure 4

2 shows a vertical section along the line IV-IV in FIG. 1 through two tiles according to the invention covered with one another,

Figure 5

a vertical section along the line VV of Figure 1 through two roofed tiles, and

Figure 6

a partial vertical section and a side view along the line VI-VI of Figure 1 by two tiles covered with each other.

Interlocking tile 1 has a head part 2, a top fold part 3, a foot fold part 4, a side fold part 5 and a middle field part 6.

The top side fold corner is designated 28, the top cover fold corner with 29, the foot side fold corner with 48 and the foot cover fold corner with 49.

The interlocking tile 1 according to the invention is a hollow interlocking tile, which can be laid both in an association and in rows. It has a vertical side and head separation joint and has a sliding area in the longitudinal direction of the brick, which is bounded at the bottom by an uncovered inner head block 215. A simple corner cut-out is available in each of the top deck fold 29 and the foot side fold corner 48.

An elevation 2142 is located between the uncovered inner head block 215 and an outer head edge strip 211, which is located in the only existing head groove 214 and extends upward as an extension of an elevated central field 611. The top rebate groove 214 is bounded towards the side rebate 5 by an extension 281 of the inner side rebate rib 513, upward by the top edge strip 211, to the right by a lowered extension 292 of the top rebate part 3 and downward by the head block 215.

In alignment with the midfield troughs 612 and 613, troughs 2141 are present adjacent to an elevation 2142, which is located in an extension of the midfield 611.

The midfield troughs 612 and 613 have the same level at their deepest point, as do the troughs 211 in the top rebate groove 214, in order to enable a continuous and unimpeded drainage of the head rebate on the brick center panel. For this purpose there are drainage openings 2151 in the top rebate block 215 at the lowest point of the troughs.

The elevation 2142, which is in the extension of the middle field 611, is not carried out up to the top edge strip 211, but instead has a depression 2143 in front of the top edge strip.

Lowering 2143, troughs 2141 and troughs 612 and 613 to the left and right of the center field 611 are preferably at the same low level.

The head edge strip 211 has a hook-shaped kink 291 in the area of the top deck corner section 29.

The upper apex surface 312 of the top fold part 3 is lowered in the region of the top fold groove 214. The side fold part 5 is equipped with covered side fold ribs 511 and side fold grooves 512. A water switch 481 and the locking pin 482 are located in the base side fold corner 48. A lowered region 282 is located in the head side fold corner 28.

A locking lug 222 is arranged on the back of the brick between the two hanging lugs 221 and engages in the depression 2143 of the top rabbet groove when the bricks are stacked horizontally. It is used to lock the tiles stacked on top of each other and prevents the tiles from slipping off each other on the roof. The locking lug 222 and the two hanging lugs 221 form a continuous bar, as it were.

On the back of the brick there are support ribs 621 which are carried out up to the top edge of the brick and act there as stacking knobs 622. When the bricks are stacked horizontally as shown in FIG. 3, they lie on the top edge strip 211 of the brick underneath.

In order to avoid material accumulations in the particularly dry-sensitive top rebate part, recesses 623 are arranged between stacking knobs 622.

There is a recess 624 on the back of the brick corresponding to the elevation 2142. The hanging lugs 221 and the locking lug 222 preferably have the same height.

The foot rebate part 4 consists essentially of the inner foot rebate rib 441 and the outer foot rebate rib 442. The inner foot rebate rib 441 has pins 4411 which insert into the depressions 2141 of the top rebate groove 214 when the tiles are covered.

Approximately in the area of the middle field there is a notch 4412 in the inner foot rib 441, which engages in the hook-shaped kink 291 of the top edge strip 211 when covering in the bandage. The outer foot rib 442 also has pins 4421 in a manner known per se.

The supporting ribs 621 have depressions 625 in the area of the roof batten in front of the hanging lugs 221 and the locking lug 222 in order to enable the hanging lugs 221 to engage as deeply as possible on the roof batten. This is necessary in the roof tile according to the invention, since the support ribs 621 have been increased for the reasons already mentioned.

FIG. 4 shows the foot area of a covering brick as it engages in the interlocking of the roof of the covered brick. The lower ends of the pins 4411 and 4421 of the foot rebate lie in the recess 2141 of the covered brick. The vertical section runs through drainage opening 2151 and shows the type of drainage.

This and the subsequent vertical sections of FIGS. 5 and 6 make the large headroom at the same time less Coverage clearly. Figure 4 in particular shows the large displacement range.

FIG. 6 shows brick III from the side, while brick I in vertical section. It can be clearly seen how the water from the water switch 481 drains into the top interlocking of the covered brick.

Claims (16)

Interlocking bricks, primarily hollow rebated bricks, with a head and side rebate and a sliding area in the longitudinal direction of the brick in the form of a head clearance, which is limited compared to the central brick area by a transverse, uncovered head block lying outside the head rebate,
characterized,
that between the head block (215) and the top edge strip (211) there is a single top rebate groove (214), in which the outer (442) and the inner foot rebate rib (441) engage when covered and that in the area of the top rebate groove (214), an extension (281) is attached in alignment with the inner, not covered side fold rib (513) and a lowered extension (292) of the cover fold part is arranged in alignment with the cover fold part (3) and both extensions have the same cross-section as far as the outer top edge strip (211). Interlocking tile according to claim 1,
characterized,
that the top edge strip (211) in the form of a hook-shaped kink (291) is angled around the corner cutout (295) in the top corner fold (29). Interlocking tile according to at least one of the preceding claims,
characterized,
that the inner foot rib (441) has pins (4411, 4421) in the same way as the outer foot rib (442). Interlocking tile according to at least one of the preceding claims,
characterized,
that in the area of the middle field (611) on the back of the brick in the inner foot rib (441) a notch (4412) is attached in which the hook-shaped bend (291) engages when concealed in the bandage. Interlocking tile according to at least one of the preceding claims,
characterized,
that between the head block (215) and the outer head edge strip (211), that is, in the existing single head groove (214), an increase (2142) in extension of the elevated middle field (611) is attached. Interlocking tile according to at least one of the preceding claims,
characterized,
that the elevation (2142) is not carried out up to the outer head edge strip (211), but has a recess (2143) before it flows into the outer head edge strip (211). Interlocking tile according to at least one of the preceding claims,
characterized,
that a locking lug (222) is arranged on the back of the brick between the hanging lugs (221), which engages in the recess (2143) when the bricks are laid horizontally one on the other. Interlocking tile according to at least one of the preceding claims,
characterized,
that the suspension lugs (221) and the locking lug (222) have the same height. Interlocking tile according to at least one of the preceding claims,
characterized,
that the two suspension lugs (221) and the locking lug (222) are combined to form a continuous rib in the form of a suspension and locking strip and one of these strips engages in the recess (2143) when the tiles are laid horizontally. Interlocking tile according to at least one of the preceding claims,
characterized,
that in extension of the troughs (612) and (613) to the left and right of the raised middle field (611), and to the left and right of the elevation (2142) in the top groove (214) also troughs (2141) are provided, in which both the Engage pins (4421) of the outer foot rib (442) as well as the pins (4411) of the inner foot rib (441). Interlocking tile according to at least one of the preceding claims,
characterized,
that the troughs (2141) and the recess (2143) located in the extension of the middle field troughs (612) and (613) in the top rebate groove lie in one plane. Interlocking tile according to at least one of the preceding claims,
characterized,
that the support ribs (621) located on the back of the brick are carried out up to the top edge of the brick and act there as stacking knobs (622) which rest on the top edge strip (211) of the underlying brick when the bricks are laid horizontally. Interlocking tile according to at least one of the preceding claims,
characterized,
that the support ribs (621) have depressions (625) in the head region. Interlocking tile according to at least one of the preceding claims,
characterized,
that recesses (623) are arranged between the stacking knobs (622). Interlocking tile according to at least one of the preceding claims,
characterized,
that there is a recess (624) on the back of the brick, in the area of the top elevation (2142). Interlocking tile according to at least one of the preceding claims,
characterized,
that stack humps (622) are arranged after the hanging and locking bar, which lie on the top of the head strip (211) of the underlying brick when the bricks are laid horizontally.

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